Nghiên cứu tìm nguyên nhân và đề xuất giải pháp khắc phục một số tồn tại phát sinh khi vận hành cửa van đập đáy

DANH SACH CAC BANG Gia tri gdc a img vdi mdi mftc md cua van Gdc P cua day keo van Chuyen vi cua mat tran Tradng hgp 13.9m iTng suat Sn va S22 trong ban mat khi dinh van 13.9 LTng suat t

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BO NONG NGHIEP VA PHAT TRIEN NONG THON BHTL

TRU'dNG BAI HQC THUY Lgfl

175 Tay Sun - Quan Bong Ba - Ha Npi

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NGHIEN c t r u TIM NGUYEN NHAN VA

DE XUAT GIAI PHAP KHAC PHyC M O T SO

T 6 N TAI PHAT SINH KHI VAN HANH

HOI B 6 N G DANH GIA CHINH THlTC

CHU TICH HOl D6NG

Hd Npi, ngccyti thdngfndm 2010

ca QUAN CHU TRI i>t TAI

^fpi-HBfU TRUdNG /f RUdNG B^l HQC THUY LQI

HdNgi, ngay thdng ndm 2010

CO QUAN QUAN LY fife TAI

DIWONG

DANH SACH CAC CA NHAN THAM GIA CHINH

GS.TS Nguyin Van Le

Th.S Le dinh Phat

PGS.TS Hoang dmh Tri

TS Nguyen dinh Tan

PGS TS Trin manh Tuan

ThS Nguyin anh Diing

ThS Vu hoang Hung

TS Hoing xuan Thanh

ThS Hoing anh Giang

Th S Trinh quang Thiiy

Co quan Tracmg Dai hgc Thiiy loi

Tradng Dai hgc Thiiy lgi

Vien khoa hgc thiiy Igi

Tradng Dai hgc Thuy lgi

Tradng Dai hpc Thiiy Igi

Tradng Dai hgc Thity lgi

Tracing Dai hgc Thity Igi

Tradng Dai hgc Thiiy Igi

Tracmg Dai hgc Thiiy Igi

Vien KH CN

X D B g X D BQL cdng frinh phan lu sdng Day

Nhiem \"u Tradng nhdm phu trach nhdm

NC frang thai img suat khi md lech

Tratjng nhdm phan tich ket qua

Tradng nhom phu trach nhdm

NC frang thai irng suat khi md can

Phu frach theo doi do bien dang va luc keo cu dap Day Phu trach nghien cim vat lieu thep dap Day

Phu trach do dac khao sat an mdn

Phu trach chuyen de phan tich

So lieu do thtrc te Phuang an gia cd gdi ban le

Tratjng nhdm khao sat do dac chuyen vi cua van va dp lech true

Tmdng nhom do bien dang va lire keo van

Bao cao tong quan cdng trinh, van de nut mdi han, tieng keu

13 GO

(33/6 Z ? ^ ' - ^

DANH SACH CAC BANG

Gia tri gdc a img vdi mdi mftc md cua van Gdc P cua day keo van

Chuyen vi cua mat tran (Tradng hgp 13.9m) iTng suat Sn va S22 trong ban mat (khi dinh van 13.9) LTng suat trong dam chinh sd 1 va sd 9

Chuyen vi dirng (Uz), ngang (Ux) cua gian chdng xoan Ket qua tinh loan lire dgc trong gian chdng xoan(CTI3.9) Chuyen vi dimg (Uz) ctia gian chdng udn

Luc dgc Idn nhat trong thanh canh Chuyen vi dimg Uz ciia gian do I Ket qua tinh loan luc dgc Idn nhat trong gian dd 1 Ngi lire Itm nhat va nhd nhat trong cac dam phu Phan lire lien ket R tai cac gdi ban le 1.3.6.9

Do chenh theo phuong dirng tai dinh van hai dau Gia tri gdc a ung vdi mdi muc cao trinh

Gdc P ciia day keo van Ket qua tinh loan chuyen vi ciia 2 diem A va B khi dinh vandCT-t^l3.9

Ket qua tinh toan chuyen vi mat Iran l/ng suat Sl 1 va S^^ trong ban mat ctia van khi dinh van d CT+13.9

Ket qua tinh loan chuyen vi cua dam chinh khi dinh van d CT-i-13.9

Ket qua tinh loan chuyen vj cua dam chinh khi dinh van d CT-i-13.9

Chuyen vi thang dimg Uz ciia dan chdng xoan Ket qua tinh toan luc dgc trong gian chdng xoan Ket qua tinh loan lire dpc trong gian chdng xoan

Ket qua tinh toan luc dgc trong dan dd I khi dinh van d CT-i-13.9

Ket qua tinh chuyen vi thang dirng ciia dan dd II khi dinh vandCT-H3.9

Ket qua tinh toan luc dgc trong dan dd 11 Ket qua tinh toan ngi luc ciia dam phu dihig va ngang Phan lire lien ket tai eac gdi ban le khi dinh van d CT-i-13.9

Ket qua tinh chuyen vi cua 2 diem A va B Luc keo ciia day cap C d tai van phai Ket qua tinh chuyen vi cua mat Iran

iSng suat Sn va S22 trong ban mSt cua van

Ket qua tinh chuyen vi dam chinh Ket qua tinh loan img suit trong dam chinh Ket qua tinh chuyen vi ctia din chdng xoan Ket qua tinh loan luc dgc trong din chdng xoan Ket qua tinh toan luc dgc trong din chdng xoan Ket qua tinh chuyen vi ciia dan chdng udn Ket qua tinh toan ngi luc trong dan chdng udn Ket qua tinh loan chuyen vi cua dan do 1 Ket qua tinh loan luc dgc trong din dd 1 Ket qua tinh loan chuyen vj thing dirng ciia dan dd 2 Ket qua tinh loan luc dgc trong dan do 2

Chuyen vi dam dung d 2 dau van Chuyen vj dam dirng d 2 dau cua van Phan lire lien ket tai cac gdi ban le Dien bien ung suit trong thanh din khi keo van Cac tradng hgp tinh loan

Ket qua tinh toan chuyen vi mat trin

Ket qua tinh loan lire dgc trong dan chdng xoan Ket qua tinh loan chuyen vi cua dan chdng udn Ket qua tinh loan ngi luc trong dan chdng udn Ket qui tinh loan chuyen vi ctia dan do 1 Ket qui tinh toin ngi luc trong dan dd 1 Ket qua tinh toan chuyen vi trong din dd 2 Ket qui tinh toan ngi luc trong dan do 2 Ket qua tinh toin ngi luc cita dim phu dimg va ngang img vdi MNTL +13.9 dinh van +13.9

Ket qua tinh toin ndi luc ciia dim phu dimg v i ngang Phan lire lien ket tai cac gdi ban le

Luc keo tao lech ctia day cap d tai van phii Ket qui tinh loan ehuyen vi cua mat trin Ung suit Sl 1 vi S22 trong ban mat cua van Ket qua tinh toan chuyen vi cua dam chinh Ket qui tinh toin img suit trong dam chinh Chuyen vi ciia dan chdng xoan

Kit qui tinh toan luc dgc trong din chdng xoan Ket qui tinh toan chuyen vj ciia dan chdng udn Ket qui tinh toan ndi luc trong din chdng udn Kit qui tinh loan chuyen vj ctia din do 1 Ket qua tinh toan luc dgc trong dan dd 1 Ket qui tinh loan chuyen vi ctia din dd 2 Ket qua tinh toan luc dgc trong din dd 2 Ket qua tinh loan chuyen vj cita dam phu ngang va dung Ket qua tinh toan ndi luc ciia dam phu ngang va dftng Phin luc lien ket tai cac gdi ban le

Chuyen vj d hai dau van

Anh hudng cua keo lech tdi chuyen vj vi irng suat ciia cua van

Diln bien chuyen vi vi iing suat ctia cua van khi dp chenh hai dau din

Chuyen vi ciia dan chdng xoan khi cd tai va khi khdng tai Chuyen vi cua dan chdng udn khi cd tii v i khi khdng tai Chuyen vi ciia dan do 1 v i 2 khi co tii va khi khdng tii Ung suat Sl 1 vi S22 trong bin mat cua van khi co tii v i khdng tai

iTng suit trong dim chinh khi cd tai v i khdng tii Luc dgc trong din chdng xoan khi cd tii v i khdng tai Luc dgc trong din chong udn khi cd tii vi khdng tii Luc dgc trong din ddi khi cd tai va khdng tai

Luc dgc trong dan 60 2 khi cd tai v i khdng tai

Ngi luc cua dam phu dftng vi ngang khi cd tii vi khdng tii

Phin lire lien ket tai cac gdi ban Ie Ung suit Sii va S22 trong bin mat khi dinh van d CT+13.9 Ket qua tinh toin chuyen vi cua dam chinh

Ket qua tinh toin ung suit trong dam chinh Chuyen vi thang dirng Uz cua din chong xoan Ndi luc trong cac thanh hi nirt mdi ban

Chuyen vi Uz cua bin mat va dam chinh 9 vi 17 iTng suat phap S cua ban mat ha luu

Chuyen vi Uz cua giin chdng xoan , chdng udn, gian do 1

v i giin do 2 Luc dgc N trong cic thanh giin chdng xoin, giin chdng udn, giin dd 1 v i 2

Phin luc gdi ban le Rxz sd 1,9,17 Bing thdng ke thdi diem xuat hien tieng keu IJng suit trong 6 dam khi md lech

va MNTL+13.9 Ket qua tinh loan lire dgc trong cac thanh dan chdng xoan khi cao trinh dinh van va MNTL +13.9

Hieu qua giam dp lech hai dau van khi van hanh chiu ap luc nudc khi dinh van va MNTL d +13.9

Chuyen vi Uz hanh E cua giin chdng xoan khi dinh van

va MNTL+13.9 Ket qui tinh toin lire dgc trong trong din chdng xoan khi dinh van v i MNTL+13.9

Phan luc lien ket tai cac gdi ban le khi dinh van va MNTL + 13.9

IJng suit trong gdi ban le

DANH SACH CAC HINH VE VA DO THI

So dd ket cau cua van sau khi cai tao

So dd ket cau efta v i ket ciu ddng md d +13.9

Md hinh toin cinh 3D cua van dap Diy Dim chinh

Dan tang cucmg hai dau

Mo hinh toin cinh nhin tu dudi ctia cua van dap Day Ket ciu dam chinh, din ngang, din cheo, dim phu ngang

v i dirng

So dd ket ciu din do

So dd cua van phu Anh binh xe cu Cdi bim le Miy do do day vat lieu parametrics Model 25

So do bd tri ludi do mat ngoii cua 3 vi 7

So dd bd tri cac mdc quan trie tren din chdng xoin sd 7 Anh may toin dac dien tu LEICA TC-1800

Bieu dd chuyen vi thing dimg hang 1 d ban mat sd 7 Biiu dd chuyen vi thang dimg hang 2 d ban mat sd 7 Bieu dd chuyen vi thang dirng hing 3 d ban mat sd 7 Bieu dd lech ngang ciia true quay ciia cua van sd 7 Bieu dd lech dung cua true quay ciia cua van sd 7 Miy ddng md

May ddng md (chdt thang, cdc ham)

So dd ciu tao cac bd phan co khi co ban cua may ddng

Cum phien do tren dam chinh

Sa dd vi tri gin phien do tren thanh do true cdi ban le Thiet bi do

Cac ket cau chinh cua van

Vi tri cac vet mil cua 7

Vi tri cic vet nirt cua 6

Vi tri cic vet nirt cua 5

Vi tri cic vet mil cua 4

Vi tri cac vet nirt cua 3 Mdi ban nirt

Mdi han nirt Hien trang cdi bin le

Md hinh hda ket cau van dip Diy Mat cat ngang cua van

He tpa dp tinh loan Hinh dang chuyen vj mil trin Chuyen vj mat Iran

Phd chuyen vi bin mat van thay ddi theo muc do md Phd irng suat ban mat thay ddi theo muc dp md Dien bien irng suit ban mat thay ddi theo muc do md Chuyen vj ciia dam chinh sd 9 khi dinh van d CT+13.9 Phd ftng suit cua cic dim chinh khi dinh van d CT+13.9

So dd ket eau dan chdng xoan Bieu dd chuyen vi cua cac hang d giin chdng xoan Hinh dang chuyen vi ctia giin chdng xoan

Bieu do luc dgc cua giin chdng xoan Diln bien luc dgc trong thanh 2-3 d cic hing Dien bien luc dgc trong thanh dirng 1 -2 d cac hing Ket cau din chdng udn

Hinh dang chuyen vi diing ciia din chdng udn Phd bieu dd lire dgc ciia din chdng udn

So dd ket cau dan do 1

So dd bien dang vi phd bieu dd ndi luc ciia dam dung sd

17 Khi dinh van d C T + 13.9 Phd bieu do ndi luc ctia dam dgc sd 10 Phin luc lien ket tai cac gdi bin le Dien bien phin luc khi md can Cua van nhin tft ha luu

Mat cat ngang cua van Cua van dau trai d cao trinh ZA*

Cua van d cao trinh +13.90 Hinh dang bien dang ciia cira van Hinh dang bien dang ciia ban mat van Dudng thing chuyen vi Uz cua bin mat van Bieu dd chuyen vi thing dirng cua 3 hing I, II, III d mat tran

Bieu dd irng suit phip Si i Bieu dd irng suit phip S22 Hinh dang bien dang ciia cic dam chinh Hinh dang chuyen vi ciia dim chinh sd (17) Bieu dd ftng suit phip Si 1 cua cic dam chinh Bieu do ftng suit phap Sn cua bin bung dam s d ( l ) Bieu dd img suit phap S| 1 cda bin bung dam sd (9) Bieu dd irng suat phap S11 cua bin bung dam sd (17) Bieu dd irng suat phap S22 ciia cac dim chinh

Bieu dd irng suit phap S22 ctia bin bung dam sd (1) Bieu do ung suit phap S22 ctia bin bung dim sd (9) Bieu dd ung suit phap S22 cila bin bgng dim sd {17) Bieu do img suit phip S22 ciia ban canh cac dim chinh Ket cau din chdng xoin

Bieu dd luc dgc ciia dan chdng xoan Ket cau dan chdng udn

Bidu dd luc doc ciia din chdng udn khi dinh van d CT +13

Bieu do luc dgc cua din dd2 Bieu dd chuyen vi ciia dim phu ngang 2,5,10, dam phu dimgsd 1,17 v i 3 4

Bieu do mdmen udn ciia cac dam phu dimg v i ngang

So dd bien dang va bieu dd ngi luc ciia dim dirng sd 1 Bieu do ndi luc cua dam ngang sd 2

Phin luc lien ket tai cac gdi ban le Cua van d cao trinh +12.90

So dd bien dang ciia dam phu dimg sd 1 va 34

So do tinh toin cua van cd tii Dudng mat nudc

So dd ap luc nudc tic dung len bin mat van va phucmg trinh ap luc nudc p(z) ctia mdi doan bin mat van

Bieu dd ap luc thuy tmh bang phd miu cac tmdng hgp tinh

Hinh dang bien dang ciia bin mat van Bieu do chuyen vi thing dimg ctia hing 1, II, III d mat tran

Phd miu chuyen vi Uz Phd mau ung suit phip Si i cua bin mat nhin tu phia tren (Top) MNTL+13.9

Phd miu ling suat phap S22 cua ban mat nhin tu phia tren (Top) MNTL+13.9

Vi tri 10 diem dugc xac dinh chuyen vi cita dim chinh Hinh dang bien dang ctia cac dim chinh

Phd ung suit Sn ban bung cac dam chinh (1), (3) (9) tradng hgp V (Dinh van +12,90; MNTL +13.90) Phd ling suit S22 ban bung cac dam chinh (1), (3), (9) tradng hap V (Dinh van +12,90; MNTL +13.90)

So dd ket cau gian chdng xoin Bieu dd chuyen vi hing E, K, F, K', E' cua dan chdng xoin

Bieu do luc dgc ctia giin chdng xoin Bieu dd chuyen vi hing E, G', G ciia din chdng udn

Ket cau dan dd 1 Bieu dd chuyen vi hing F va I ctia din dd 2 Bieu do luc dgc cila giin dd 2

Hinh dang bien dang dim phu dung va ngang Bieu do chuyen vi Uz(mm) ctia dim ngang sd 3 trong cic trucmg hgp

Bieu dd mdmen udn M33 cua cac dam phu dftng va ngang MNTL +13,90 dinh van +13,90

Bieu do ngi luc ciia dam ngang sd 3 MNTL +13,90, dinh van+13,90

So dd bien dang vi Bieu dd ndi luc cua dim dimg sd 1 ung vdi MNTL+13,90, dinh van +13,90

Phin luc lien ket tai cic gdi bin li Bieu do phin luc lien ket tai cic gdi ban le cac tradng hgp Cua van nhin tu thugng Itm

Ket cau van dip diy Mat cat ngang cua van (+13,90) Bieu dd ip luc thuy tinh img vdi MNTL + 10.35 Bieu dd ip luc thily ttnh iing vdi MNTL + 11.70 Bieu dd ip luc thiiy tinh img vdi MNTL + 12.90 Bieu dd ap luc thuy tinh iing vdi MNTL + 13.90 Phd miu ip luc nudc tic dung len ban mat van Hinh dang bien dang ciia cua van

Hinh dang bien dang ctia bin mat van Dudng thing chuyen vi Uz ctia bin mat van Phd miu irng suit phap Si i ctia bin mat nhin tft ha luu Phd mau ting suit phap S22 cua bin mat van nhin ttt ha luu

Phd miu irng suit phap Sn cita bin mat van thugng luu Phd miu iing suit phap S22 bin mat thugng luu

Vj tri cac diem tren mat trin cd img suit phap Idn nhat

Vi tri cic diem tren mat thugng luu cd img suit phip Icm nhit

Vi tri cac diem cd S„ai va S^n cila ban bung dim (1) Phd miu ftng suit phip Si 1 ctia bin bung dim Phd miu img suit phap S22 ciia ban bung dim (9)

Vi tri cic diem cd S^ax va Sm,n ctia ban bung dam (9) Phd miu img suit phip Si 1 cua ban bung dim chinh (17) Phd miu ung suit phap S22 cua ban bung dam chinh (17)

Vj tri eac diem cd S„,„ vi S„i„ cua bin bung dam (17)

Vj tri iing suit phap Itm nhit cua bin canh dim chinh

Vj tri ling suit phap Itm nhit cui ban canh dim chinh (9)

Vj tri irng suit phap Idn nhit cui ban canh dim chinh (17) Bieu do chuyen vj ciia GCX khi md lech, MNTL +10.35 Bieu dd luc dgc ciia giin chdng xoan

Bieu dd chuyen vj hang E, G', G ciia gian chdng udn Bieu dd luc dpc cua gian chdng udn

Bieu do luc dpc cua giin do 1 Bieu dd luc dpc cua dan do 2 Bieu dd chuyen vj Uz(m) cita dim ngang sd 3 Bieu dd mdmen udn cita cic dam phu dung v i ngang ung vdi MNTL+10.35

Biiu do ndi luc cua dim ngang sd 3 img vdi MNTL + 10.35

So dd bien dang vi Bieu do ndi luc ciia dim dimg sd 1 ung vdi MNTL+10.35

Phin lire lien ket tai cac gdi ban le iing vdi MNTL +10.35 Bieu dd phan luc lien ket tai cic gdi ban le

Dien biin luc keo lech khi khdng tai (KT) v i khi cd tii (CT)

Mat cat ngang d hai dau van A* v i B*

Chuyen vj mat Uin khi cd tii v i khdng tii Dien bien chuyen vj cua nut 17 bing 11 v i III

Diln biin ung suit cua diim Bl.AlO, Hl.El v i Hl.ElO khi MNTL thay ddi tu+10.35 din+13.90

Phin luc gdi bin le khi cd tii v i khi khdng tii Phin lire gdi bin le khi MNTL thay ddi

Hlnb dang bien dang cila cua van khi dinh van d CT + 13.9

Mat cat ngang cua van Phd img suit phap S22 md cin Phd ling suit phap S22 md lech Dien bien img suat d ban mil Hinh dang bien dang ciia cic dim chinh Hinh dang chuyen vj ciia dam chinh sd (17) Chuyen vj ciia dim chinh sd 1, sd 9, vi sd 17 Phd ling suit phip Sn cua dam chinh sd 1 Phd img suit phip S22 ciia dam chinh sd 1 Dien bien ung suit d cinh v i bung dam chinh

So dd ket eiu giin chdng udn Chuyen vj cua giin chdng udn khi dinh van d CT + 13.9 (md can)

Ngi luc trong gian chdng udn Chuyin vj ciia giin chdng udn khi dinh van d CT + 13.9 (md lech)

Ngi lue ctia giin chdng udn khi dinh van d CT + 13.9 (md lech)

So do ket ciu dan dd 1 Chuyin vj cila giin do I khi dinh van d CT + 13.9 (md can)

Npi luc cila gian dd 1 khi dinh van d CT + 13.9 (md cin) Chuyin vj cila gian dd I khi dinh van d CT + 13.9 (md lech)

Ngi lire cila gian dd I khi dinh van d CT + 13.9 (md lech) Ket ciu din chdng xoin

Bieu dd lire dgc ctia giin chdng xoan

Vj tri nirt mdi hin d GCX Bieu dd phan bd phan luc R^, R^ md can d cao trinh + 9.00

Dudng bieu dien phin luc khi md can theo cao trinh dinh van

Ducmg bieu dien phin luc khi md lech Dudng bieu diln phin luc khi md lech Diln bien phin luc gdi 1 khi md cin va md lech theo muc

Vi tri bd xung thanh dung Mat ha luu da dugc gia cd bang cac dam phu dgc

Dd thj do chenh dinh hai diu van cua sd 7 Chuyen vj hang 3 bin mat ha lim

Dien bien img suit S| i d bin mat thugng Itm Dien bien phan luc gdi 1 khi md cin va lech Thiet bj ddng md van

Vj tri 5 ming ngan Ket ciu ming ngan theo phuang in 4

Md hinh khdng gian mdt gdi bin le Gdi bin le va giai phap gia cd

Su thay ddi img suit khi gia cd cdi ban Ic

Truong Dgi hoc Thiiy lot

Md diu

Tdng quan ve ket cau cua van Dap Day hien nay

Nhirng hien tugng phit sinh khi vin hanh cua van

Muc tieu va nhiem vu nghien cim

CHlTONG II Ket qui khio sat do dac thuc te hien tradng

Ket qua khao sat an mon

Ket qua do chuyen vi cua cila 3 vi ciia 7

Ket qua do bien dang khung chinh, coi bin le va lire keo van

Ket qua khio sat hien tucmg nirt moi hin

Khao sat tieng keu

IChao sat gdi bin le

CHl/ONG III Phan tich ngi lire, irng suit va chuyen vj ciia

cira van cin khi chua chju ap luc nudc

Dat van de

Phuong phip phin tich kit ciu ctia van - Phircng phap PTHH

Phan tich noi luc, chuyen vj ciia cua van sd 7

Chuyen vi vi img suit cua ban mat cira van

Chuyen vj vi ftng suit cua dam chinh

Chuyen vi va noi luc dan chdng xoan

Chuyen vi vi ndi luc dan chdng udn

Chuyen vi vi noi luc dan da 1

Chuyen vi vi noi luc cua dim phu dirng va dim phu ngang

Phan luc lien ket tai cac gdi bin le

CHlfONG IV Phan ti'ch ndi luc, irng suit va chuyin vi ciia

cua van lech khi chua chiu ap luc nudc

Npi dung va muc tieu nghien cim

Nghien ciru tim nguyen nhan va de xuat giai phdp khac phue mot so

hi?n (u(mg ton lgi khi van hanh cua van Dap Ddy

Truong Dgi hoc Thiiy lai

Phuang phip PTHH phin tich ket cau cira van

Tinh toan ngi lire vi chuyen vi cua van d CT+13.9

So do tinh loan cua van

Xac dinh lire T5

Chuyen vj vi irng suit ciia bin mat cua van

Chuyen vi va iirng suit ciia dam chinh

Chuyen vi va noi luc dan chdng xoan Chuyen vj va ngi lire dan chdng udn

Chuyen vj va npi lire dan dd 1

Chuyen vi vi npi luc din dd 2

Chuyen vi vi noi luc cua dam phu dimg va dam phu ngang

Phan lire lien ket tai cic gdi ban le

Noi lire va chuyen vj cira van d cac cao trinh khic Xac djnh luc T4

Chuyen vi vi ftng suit ciia ban mat cua van Chuyen vi va img suit ciia dam chinh Chuyen vj vi npi lire din chdng xoan

Chuyen vi vi ngi lire dan chong uon

Chuyen vj va ngi luc dan do 1

Chuyen vj vi ngi luc dan dd 2

Chuyen vi va ngi lire ciia dam phu dftng va dim phu ngang

Phin lyre lien ket tai cac gdi ban le

Ket luin vi kien nghj

CHU*ONG V Phan tich ngi luc, img suit va chuyen vj ciia cua

van cin khi chua chiu ip luc nudc

Ngi dung va muc lieu nghien cim

Ket qua tinh toan

Nghien ciru tim nguyen nhdr vd de xudi gidi phdp khac phue mpt so

hi^n tuang ion tgi khi van hdnh cira van Ddp Ddy

Tritang Dgi hpc Thuy lai

Chuyen vj va irng suat cua ban mat cua van

Chuyen vj va ftng suit cua dam chinh

Chuyen vi vi noi luc dan chdng xoin Chuyen vj vi ngi lire dan chdng udn

Chuyen vi v i ngi lire dan da 1

Chuyen vi vi noi luc din do 2

Chuyen vj vi npi luc cua dam phu dung va dam phu ngang

Phin luc lien ket tai gdi ban le

CHlTONG VI Phan tich ngi lire, img suit va chuyen vi cua

efta van lech chju ap lire nudc

Ngi dung va muc tieu nghien ciru

Ket qua tinh toin

Cuavan dong d CT+13.9 vi chiu ap luc nudc

Chuyen vi vi iing suit cua bin mat cua van

Chuyen vj vi ftng suit ciia dim chinh

Chuyen vj vi ngi lire din chdng xoan

Chuyen vj vi ngi lire dan chdng udn

Chuyen vj vi ngi lire din dd 1

Chuyen vj va ngi lire din dd 2

Chuyen vj vi ngi luc cua dim phu dung vi dam phu ngang

Phan luc lien ket tai cic goi bin le

Ket luin vi kien nghi

CHlTONG VH Phin tich tim nguyen nhan va de xuat giii

phip khac phue

Mddiu

Phan tich ngi luc va chuyen vj ciia cua van khi van hinh chua

chju ap luc nudc

Dien bien ngi lire va chuyen vj Dien bien ngi luc Idn nhil va

Nghien cuu tim nguyen nhdn vd de xudt gidi phdp khac phue mot s

hi^n tu^g ton tgi khi van hdnh cira van Dap Ddy

Truang Dgi hpc Thuy loi

Chuyen vj va iing suit cua bin mat cua van

Chuyen vi va ftng suit cua dam chinh

Chuyen vi vi ngi luc din chong xoan Chuyen vj va npi lire dan chong u6n

Chuyen vj vi ngi luc din dd 1

Chuyen vi va ngi luc din dd 2

Chuyen vi va ngi luc ciia dam phu dirng va dim phu ngang

Phin lire lien ket tai goi bin le

CHlTONG VI Phan tieh ngi luc, ung suit va chuyen vj ciia

efta van lech chiu ip luc nudc

Ngi dung vi muc tieu nghien cim

Ket qui tinh loan

Cuavan dong d CT+13.9 va chiu ap luc nudc

Chuyen vi va irng suit ciia ban mat cua van

Chuyen vj vi irng suit cua dim chinh

Chuyen vj vi ngi luc din chdng xoan

Chuyen vj vi ngi luc dan chdng udn

Chuyen vi va noi luc din do 1

Chuyen vi vi noi luc din dd 2

Chuyen vi vi ndi luc cua dim phu dimg vi dim phu ngang

Phin lire lien ket tai cic goi bin le

Ket luin vi kien nghi

CHlTONG VII Phan tich tim nguygn nhan vi di xuit giii

phip khac phue

Md diu

Phan lich ngi luc va chuyen vi cua cua van khi van hinh chua

chju ip lire nudc

Dien bien ngi lire va chuyen vj Dien bien ngi luc Idn nhit va

Nghien ciru tim nguyen nhdn vd de xudt gidi phdp khac phue mot so

hien tugng ton tgi khi van hdnh cira van Ddp Ddy

Trirong Dgi hpc Thuy Ipi

nhd nhat d ban mat efta van khi dinh van d CT+13.9

Diln biin ngi lire Itm nhat va nho nhat d dim ehiiih khi van bi

lech

Dien bien chuyen vj v i ndi lue d giin chong uon

Dien bien chuyen vj va ngi luc Idn nhit va nhd nhit d gian dd 1

Dien bien chuyen vj va ngi lue Idn nhit va nhd nhit d gian

chdng xoan

Phan tich dien bien phin luc gdi tua khi van md lech

Phan tich ngi luc vi chuyen vj cua cua van khi van hanh chju

ap lire nudc

Cic hien tuting tdn tai, nguyen nhan vi cac giii phip khae

phue ddi vdi ket ciu cua van

Hien tugng an mdn

Hi?n tutjrng nftt mdi han

Hien tugng xuit hien tieng keu

Hien tugng cua van ludn ludn d trong trang thai keo Igch

Hien trang gdi bin le, giii phip gia cd

Hifn trang gdi ban le

Giai phap gia cd

Ket luin

Phu luc A

Phu luc B

Ngi dung chuyen de va bao cio

Tai li?u tham khio

Nghien cuu tim nguyen nhdn vd de xudt gidi phdp khac phue mot sc

hi^n tupng ton tgi khi van hdnh cira van Ddp Ddy

Trirang Dgi hpc Thuy lai

2 de noi lien vai de song Hong Ben trai Dap Day la de La Thach dai 8 km, ben phai la

de PhiJc Tho dai 12km Duong dan vao tai tuyen de huu song Hong tinh tu de La Thach den de Phue Tho rpng 3km (hinh 1)

Hinh 1.1 Ban do khu vuc cong trinh song Day

Nghien cuu tim nguyen nhdn vd de xudt gidi phdp khac phue mot so

hi4n lupng ton tgi khi van hanh cua van Ddp Ddy

Trirang Dai hpc Thiiy lai

Cong trinh phan lu dap Day duac xay dung each day han 70 nam Ngay tu nam 1929 ngucri Phap da nhan thay can phai xay dung cong trinh nay d6 bao ve thii do Ha Noi khoi

bj uy hiep eua lu song Hong Cho nen nam 12/1934 nguai Phap khai cong xay dung cong trinh dap Day vcri ban thiet ke mgt loai cua van co ket cau rat mai, lan dau tien ducrc xay dung tren the gioi - Cua van mai nha - vai hinh thuc dong ma tu dgng thuy luc c6 sir ho trg cua ap luc khi (hinh 2)

MAT CAT NGANG CONG TRINH D A P DAY CU

Hinh 1.2 Ket cau van do Phap xay dimg Den thang 7/1937 khanh thanh Nhiem vu dat ra liic bay gia la:

1) Phan lu song Hong de bao ve eho Ha Ngi va cac tinh ha luu vai luu lucrng thiet

ke la 3.000 mVs 800 mVs

2) Chong lu cho nhung vung ven song Day

3) Chong ling cho nhijng vung ven song Day

D^p duqrc xay dung theo kieu mai nha, \gp bang go, mai thugng luu goi Ien mai ha luu

ca 2 deu eo ban le quay gan hen vai ban mong cua dap Ben trong bd tri he th6ng phao

(16 phao)gan ehat vko khung chinh a dinh van Cua nang len ha xuong nha phao va sue

Nghien ctiu tim nguyen nhdn vd de xudt gidi phdp khac phue mot sc

hien tupng ton tgi khi van hdnh ciia van Ddp Day

Trirang Dgi hpc Thiiy lai

d3y ciia nucrc trong h^m phao (hinh 1) Cong trinh g6m 7 cira, moi cua rgng 33.75m , cao tu cao trinh 7,00 dan cao trinh 12,50m Giua 2 ciia co tru pin rong rong 3 m, trong va tren tru b6 tri cac thi^t bi dong mcr va diSu khien dong ma Tuang nguc cao 2,3 m (tii cao trinh 12,50 d6n cao trinh 14,80) dat tren tru pin d^ giG nuac, giir eiia va Iam nhiem

vu cau cong tac

Nguyen ly lam viec;

Quy trinh dong:

De khong cho nudc trim qua, cua van can duge dong lai bang each ma ciia van phu a hai dSu sat mo tru de dua nude vao buong van Nhd luc day cua nudc trong ham van, phao trong buong van hi day len, dua van len eao hem muc nudc thugng luu Ciia van liic nay

d trang thai dong - ngan khong cho niiac chay ve ha luu

Quy trinh md:

Lgi dung su ch§nh l?ch muc nudc thugmg ha luu, md cua van ha luu trong mo tru de thao nudc trong buong van ve phia ha luu, phao ha thap dan theo mue nudc trong ham van kSt hgrp vdi tac tac dung eua trgng luqmg ban than, cua van dugc ha dan xuong va cho nudc trkn qua

Vi?c lgi dung luc day noi cua phao nam dudi cua van va trgng lugng ban than lam luc nSng, ha cua van khi hoat dgng ve ly thuyet rat dam bao ky thuat, lgi ve kinh te va quan

ly Nhung khi thilt kl va xay dung da khong tiiih hit duge dieu kien khach quan:

Kha nang kho ddng true giiia cac goi ban Ie, lire ma sat d nhiJng bg phan chuyen dgng quay va trugt

- Qud trinh bien doi ap luc nude trong do ap luc thuy dgng rat phiic tap, din den su kho khan trong dilu khien ciia van khi dang boat dpng Thuc te cho thay khi cua van boat dpng vdi chenh lech muc nudc thugng ha luu nho (kiem tra) thi ap luc thiiy dgng khong Idn lim nen khi nudc tran qua ciia van, cung nhu cho nude vao hoac ra buong van de nang ha ciia van khdng anh hudng nhilu den qua trinh hoat dgng ciia chiing Khi md cua van vdi cgt nude Idn su bien ddi ve ap luc nude tae dung len ciia van bien doi rat phiic t^p (ap luc nudc trong budng van tac dung 16n phao, mat trong ciia van, ben ngoai ap lire nude tac dyng len mat ngoai ciia van) nen viec ddng md cua van khong diing vdi du kien thilt kl ban dSu (k6 ca khi cd hd trg eiia hai ep de dieu khiln), the hien qua nhihig l4n phan lu :

- Phan lii thii nghiem nam 1939.1941 va 1942 cong trinh lam viec tot, xii ly dugc nhiing true trac ky thuat nho Phan lii thuc sir nhiing nam 1940, 1945, 1947, ea 3 Ian cong trinh deu co sir co va bi hu hdng nang, khdng ddng md duge ciia dap, khdng th\rc hien dugc nhiem vu phan lu de ra Vi the:

Nghien ciru lim nguyen nhdn vd de xudt gidi phdp khac phue mdt so

hien luang ton lgi khi van hdnh cira van Bdp Ddy

Trirang Dai hoc Thiiy lai

Nam 1954 khi hoi binh lip lai Chinh phii ta da tiSn hinh nghien cim dau m siia chira thich ding; tir nim 1954 den nim 1958 nghien ciiu va m sua cip tdc cac hu hdng nang cii Tir nim 1959 den nim 1961 nghien ciiai thiSt ke cii tao dip Diy vtii nhieu y kien khic nhau chua thdng nhat nhu:

* Phi di va thiet ke mgt dap mdi

* Sir dung phin mdng vi phin thin cdn cua se dugc thay the bing ciia cung

Nam 1962 - 1964 tiep tuc nghien ciru nguyen nhin su co cua dip de khoi phue va sua chira tich cue; nen qua 2 lin phin lu nam 1969, 1971 da ban chS dugc cac hu hong Itim, cira vln lim viec dugc tuy luu lugng xi qua it, khdng chu dgng trong viec ning ha cua Chinh phu quySt djnh cai tao dip Diy (QD 300/TTg ngiy 7.2/1974) vdi nhiem vu thirc hien phan lii dugc khan tmong, an toin, chinh xic, thirc hien ddng md chii dgng an toan vdi nhiem vu:"dan lu tir sdng Hdng vio song Day vi thoit lii qua dap Diy vdi Itm lut;mg

5.000 m Is, theo dang lii nam 1971, giir mire nudc d Hi Ngi khong len qua cao trinh tuyet

doi 13,60 m"

De thirc hign nhiem vu tren, mgt trong cic hang muc dugc cii tao li kSt ciu cira van dip Diy Nim 1974 - 1975 di lien hinh:

Hoinh triet ciia so 1

Ning cao tru pin tir cao trinh 14,80 m len cao trinh 16,00 m vi md rgng mat tru tir 3,0 m Ien 8,20 m de bd tri thiit bi ning ha ciia

Giir nguyen kit ciu, hinh dang tudng nguc, kich ning tudng ngtrc tir cao trinh 14,80 m len cao trinh 16,00 m

Siia chira ciia mii nha thinh ciia quat c6

* Chiiurgng B = 33,75 m

* Chiiu cao cira (chin nudc): H = 13,9 - 9,00 = 4,9 m

* Ban kinh quay R = 10,75 m

* Trgng lugng G = 160 tan ( ki ci phin cu)

Giir nguydn 17 tam quay ha lim gan vdi bin day; bd mii thugng luu va cac bin li quay phia thugng luu

* Ning cao ngudng thugng Itm den cao trinh 9,00 m

* Mdi cira dugc bo tri 2 miy ddng md co siic ning ha 75 tin (ky hieu 75V) chay bing dien (hinh 1.3)

Nghien ciru tim nguyen nhdn va de xudt gidi phdp khac phue moi s

hien luang ion lai khi van hanh cira van Dap Day

Tnrcmg Dgi hpc Thuy lai

MAT CAT NGANG CONG TRINH DAP DAY SAU CAl TAO

Hinh 1.3 Sa do ket cau ciia van sau khi cai tao

- Sau khi cai tao ket cau ciia van thay ddi hokn toan Tii kieu mai nha (mai thugng luu

goi len mi.\ ha luu) chuyen sang dang hinh quat (bd mai thugng luu, gia cd ket cau mai

ha luu) Nang ha cua van chuyen tu lgi dung chenh lech cpt nudc (phao day) sang kieu chii dgng b§ng dpng ea dien (keo ciia van bang day thong qua 2 tai van) Ngoai ra cdn thay doi nhieu phan thiiy cdng, dien de phu hgp vdi ket cau ciia van mdi

Tir do den nay dap Day dugc tien hanh phan lu thu nghiem 1 lan ( nam 1977) va

chiia lu 1 \kn do vd de song Hong nam 1986 Cong trinh chua phan lu thuc su lan nao

ILTbNG QUAN VE KET CAU CITA VAN DAP DAY HIEN NAY

Ket cau eua van gom co cac phan ehinh sau :

- Mat bung bing ton day 10 mm gan len cac dim phu diing va ngang

- Mat tr&n bSng ton day 10 mm dugc tang cudng bing cac dim phu ngang va dpe

- Gi&n chong xoin diing thep [ va L ghep lai nhau cd gia tri nhu mgt tam tdn mdng 0,15m ndi tii dau mat bung den gan tam quay eiia cua

- Dim dd I: N6i tu khoang giiia dan chong xoin den mat ton bung thugng luu

- Dam dd II: Noi tu dan chong xoan den mat tran ha luu

- Tai van bang ton ghep (xem hinh 1-4)

Vat Ii?u sii dung : Thep CT3 lam tdn bung

Nghien cuu tim nguyen nhdn vd de xudt gidi phdp khac phue mpt so

hien lupng ton tgi khi van hdnh cira van Dap Ddy

Trirang Dgi hpc Thuy lai

} I Cira van phu

12 Ddy cdp keo cira van

13 Goi xoay

14 Tai keo cira van

Hinh 1-4: Sa dd kit ciu ciia va ket cau dong md d cao trinh dinh tran 13,9m

Ciia dugc eai tao dua tren ea sd phan dam chinh cu eiia ciia phia ha luu ehuyen thknh ciia quat bing thep (So do kit cau tong the xem hinh 1-5 Ket cau eiia mdi hoan toan khac ciia trude, chi sii dung cac cdi ban le va dam I 900 cu chuyen thanh dam

khung chinh

Nghien cuu tim nguyen nhdn vd de xudi gidi phdp khac phue moi so

hi^n tupng ton lgi khi van hdnh cira van Ddp Ddy

Tnrcmg Dgi hoc Thin- Ipi

l/'iiih / \ Mo Innh loan canh 3D cuu van Ddp Dax

Phaii dam chnili cii dura sia co Phar han rheir

1 )(

Co: l^aii le

Hiiili 1.6 Daii: dim]i

Cau t^o ctia gdm eae phan sau:

Nghien ciru lim nguyen nhdn va de xudt gidi phdp khac phue mpt so

hi^n tupng ton tgi khi van hdnh cira van Ddp Ddy

Trirang Bgi hoc Thiiy lai

- Tdn bung thucmg luu: Lam bing cic lim thep Idn diy 1 Oram dugc han vdi nhau de

chin nudc phia thugng lim van Vl true tiip chju ip lire nudc nen cic dim phu ngang dugc dat day hem cic dim phu ngang d bin mat Iran Ban mat bung thugng luu co kich thudc 33,7 X 5,44ra

- Mat Iran: Ciing dugc chi tao tir cic tam thep Idn diy 10mm hin vdi nhau cd kich thudc

33,75x9,70m Di phi chin khdng trong him van va trgn mat trin dugc lao hai hing 16

vj tri khoet dugc xac djnh bang thi nghiem thuy lire vdi yeu ciu giim luc tic dung vio mat tran de ha luc keo d mire cd lgi nhat

Dg ciing kit cau dgc cua dugc thiet ke tthoi man dieu kien cho phep keo cua vdi chenh lech 2 dau den 10 cm

Ddm chinh : Dugc cii tao tir he dam chinh ciia ciia van ci Tiet dien dim cii co dang chii

1 vdi chiiu cao 900mm, mdi cira van co 17 dim chinh Cudi mdi dim dugc lien ket vdi

mdi cdi bin le (Hmh 1-6)

Dim chinh cti dugc bin them chieu cao d doan cong de ting dg cao cho dim Dim chinh cimg vdi cac thanh cua din do va thanh bung diing ciia din chdng xoan tao thinh khung chinh Giu-a khung chinh 1 vi 2, 16 vi 17 dugc bd xung them dim chinh de lien ket vdi phin tai keo Khung chinh li ket ciu chuyen toin bg lire vi cdi bin le

- Gian chdng udn co chieu cao 5520mm, cd ciu tao d^ng din song song, hai thanh canh

cd djng liet dien ghep ][300xl00x6,5 Cac thanh bung su dung tiet dien ghep [200x76x5,2 Hai diu dugc tang cudng them hai din gom cic thanh ghep bdi cic thep gdc 2L.63x9 (Hinh 1-7)

Dugc-Hinhl-7

- H^ Ihdng ddm phu (hinh 1-8)

Dd bin mat thugng luu gdm he thdng cic dim phu dimg (thep diy 10mm cao 200mm)vi dim phu ngang cd tiit dien ]N9.200x76x5 dat each nhau 700mm Dd tdn bung mat trin cd dim phu dimg bing thep diy 10mm cao 200mm vi cic dim phu ngang bing thep ] Ne.200x76x5,2 dit cich nhau Im He niy dugc han lien ket vdi nhau \ i hin true tiep vio cic khung dirng He thong dam phu dd bin mat tang do cimg va tang khi ning on djnh cho bin mit

8

Nghien cim lim nguyen nlidn vd de xudi gidi phdp Ichac phue mot so

hien luang Ion lgi iihi van hdnh cira van Ddp Ddy

Trirang Dgi hpc Thuy lai

Hinh 1-8 Mo hinh toan canh nhin tu dudi ciia ciia van Dap Day

Nghien ciiu lim nguyen nhdn va de xudt gidi phdp khac phue mpt s

hien lupng ton tgi khi vdn hdnh cira van Ddp Ddy

Trucmg Dgi hpc Thuy lai

- G'lcin ngang dual mat trdn (Hinh 1.8, hinh 1- 9): G6m 2 dan song song nam dudi va

chay dgc suot mat tran cd chieu cao 90cm, gian nay dugc ghep bang eac thanh 2LNe.63x63x6 de dd mat tran, chung bo tri each cdi quay la 2m va 6m Chiing dugc ban vdi khung dung va mat tran Gian nay tang cudng on dinh t6ng the cho khung chinh

- Gian cheo cao 70 cm (hinh 1-8; hinhl-9): La he cae thanh thep hinh dugc bo tri giira 2

gian ngang C^c gian nay duge ghep bang eac thanh 2LN9.63x63x6 va LN9.63x63x6 Chiing dugc han ndi vdi nhau roi ban vao khung diing va dam phu mat tran He thdng gian ngang va gian cheo co tac dung tang dp ciing cho ban mat cua van, tang dp dn dinh cho he thong dam phu

Hinh 1-9 Ket cau dam chinh, gian ngang, gian cheo, dam phu ngang va ddng

Gian da IT dugc cau tao bdi cac thanh thep tiet dien ghep ][N» 160x64x5, Cd tac dung

lien ket dkn chong xoan vdi dam chinh Hai thanh canh co tiet dien Idn ban

.][No.200x76x5,2 va thanh hai diu co tilt dien Idn ban ][No300xl00x6,5 {Hinh 1-10)

Nghien ciru tim nguyen nhdn vd de xudi gidi phdp khde phue mpt so

hien tupng ton tgi khi van hdnh cira van Dap Ddy

10

Trirang Dgi hpc Thuy lai

- Gian da I co hinh dang gidng gian dd II va cung co tae dung lien ket gian chong xoan

vdi he khung dung phia mat tran Gian dd I va gian dd II tao thanh gdc 90 va tao thanh

he ket cau chdng uon cho eiia van (hinh 1- 10)

Hinh 1.10 Sa do ket cau gian da

- Cira phu: Gom co 2 ciia dugc bd tri d hai dau phia dudi thugng luu cua van Mdi ciia dugc

noi vdi he dan chdng xoin thong qua cae true ic co the quay dugc Kich thudc mdi ciia la

BxH = 76xl60cm {Hinhl-11)

Hinh 1-11: Sa dd cOra van phu

- Tai van: Dugc cau tao bdi cac thep tam day tu 12mm den 40mm han lai vdi nhau tao

th&nh mgt ket cau ciing chiing dugc lien ket true tiep vdi hai khung chi'nh: khung mdi \ a

Nghien ciru lim nguyen nhdn vd de xudt gidi phdp khac phue mpi so

hien lupng ton tgi khi vdn hdnh cira van Ddp Ddy

Trirang Dgi hpc Thuy lai

khung diing sd 2, 16 {Hinh 1.4) Dau moi tai van dugc gan puli va noi vdi ddng ca may

dong md bang he thong day cap nam trong mat phing xoz (vuong gdc vdi dpc true van) Phuang ciia day keo hgp vdi phuang thang diing mgt goe bien thien tir 46,17° den 22,08° tiiy thugc vao vi tri nang ha van

- Bdnh xe cir (hinh 1-12): Moi ciia van cd 4 banh xe cir, moi ben 2 banh xe dung de dan

hudng cho ciia van khi dong md

- Cao su chdn nuac: Chan nudc lam bang cao su, khi ciia van hoat dgng chiing tao nen

cac lire ma sat gay can trd qua trinh ddng md cira van

- Coi bdn le: Toan bp mdt eiia van cd 17 cdi ban le (hinh 1-13) Toan bg luc tac dung

vSo ciia van dugc truyen ve coi ban le roi truyen xuong nen cong trinh bang be tdng

III NHtTNG HlfN TU^gfNG PHAT SINH KHI VAN HANH CITA VAN

Theo bien ban kiem tra cua Bp Nong nghiep va PTNT, cang nhirng nam gan day d cong trinh dap Day c&ng xuat hien tieng keu la cang nhieu Bien ban ngay 08/06/2007 ghi rd " Trong qud trinh van hanh khdng tai, trong ket cau mdt sd ciia van xuat hien tieng keu to vdi tan suat 15 giay/1 lan, day la hien tugng khong binh thudng Mgt so moi hki cae thanh giang lien ket bi mit va mdt phan ket cau khung dan ciia eiia bi ngap thudng xuyen trong nudc nen sinh ra han gi va an mdn, anh hudng den su on dinh "' Theo ket qua khao sat cua nhom thue hien de tai ciing thay ba hien tugng ton tai xuat hi?n khi v|n h^nh ciia van dap Day:

- Xuat hi?n tieng keu trung binh khoang 25 giay mgt lan , tap trung vao viing ban mgt t r ^

Nghien cuu tim nguyen nhdn vd de xudt gidi phdp khde phue mpt s

hi4n lupng ton tai khi van hdnh cira van Dap Ddy

12

Trirang Dgi hpc Thuy Ipi

- Niit mdi ban; Nut moi han chii yeu say ra d dan chdng xoan va mdi han bi mit d dau

thanh, mdt sd moi han bi nut d ban dem dat d giiia thanh

- Hien tugng an mdn say ra kha tram trgng nhat la d cac thanh hi ngap nudc hien tudng mai mon khdng deu d cdi ban le ciing rit rd

IV MVC TIEU VA NHIEM VU NGHIEN ClTU

De tai dat ra muc tieu nghien ciiu :

Nghien ciiu danh gia nguyen nhan phat sinh tieng k6u, hien tugng "tach mdi han" va tinh toan kha nang chiu luc ciia eae gdi dd va ket cau ciia ciia van dap Day

NghiSn ciiu de xuat cac giai phap khac phue cac hien tugng neu tren khi van hknh cua van

De dat dugc muc tieu tren, cdng tae nghien cuu dat ra nhiem vu:

Khao sat do dae ehuyen vi ciia cac ket cau ehinh ciia ciia van nhu ban mat,

khung chmh, gian chdng xoan, gian cong uon, gian do

Khao sat do dac dp lech true ciia cac cdi ban le

Khao sat su an mon d cae ket cau chinh

Khao sat su rach tach moi han

Do dac bien dang d khung chinh, coi ban le de xac dinh iing suat d khung chinh

va phan luc coi ban le Do dac luc keo cua van

Tinh toan xac dinh trang thai ung suat chuyen vi d cac ket cau chinh cua cua van khi van d cac do md khac nhau (9,0; 10,35; 11,7; 12,90; 13,9) vdi hai trang thai ciia cua van khi van can va khi van lech cho trudng hgp van chi chiu trgng lugng ban than (khdng tai) va cho trudng hgp chiu ap lire nudc ( co tai)

Dua ra eac giai phap khae phue mgt sd ton tai phat sinh khi van hanh ciia van dap Day

Nghien cuu lim nguyen nhdn vd de xudt gidi phdp khac phue mpt so

hien tuang Ion lai khi van hanh cira van Ddp Ddy

13

Trucmg Dai hoc Thuy lai

CHX/ONG II KET QUA KHAO S^T DO B A C THUC TE HIEN TRUONG

Nghidn cuu do dac tai hien trudng l i mdt cdng viee phtic tap nhung nhtmg sd lieu

do dugc lai rit quy gii cho viec dinh gia hien trang lim viec ciia cdng trinh vi do tin ciy khi nghien ciru ly thuyet Trong chuong niy se trinh bay ket qui khao sat do

an mdn chuyen vj etia cira van, do lech true ban l i , , luc keo van, irng suit bien dang d khung chinh v i phin luc gdi bin le

I KET QUA KHAO SAT AN MON

1.1 Thiet bj sir dung do an mon

Sir dung may do do diy vit lieu Panametries Model 25 ctia My (Hinh 2-1)

Hinh 2-1 May do do diy vat lieu Panametries Model 25

1-2 Phuo-ng phap va ket qua do do day con lai tai hien trudng

Phuong phap do: Mdi diem do 3 lan, chieu diy do dugc li sd tmng binh cua 3 lan dgc Chung tdi di tien hinh do cho 1108 diem do Ket qui duge the hien trong bing 2-1

Bing 2-1: Tdng hgp ket qua do an mdn d eac ket ciu ciu

Nghien cuu lim nguyen nhdn vd de xudt gidi phdp khde phue mot sd

hien tupmg ion lai khi van hdnh ciia van Ddp Ddy

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Truang Dai hoc Thuy loi

GiOa mil ha Itru

Gin sit gdi quay

Thep gdc va bin bung ciia thep chir [

bj in mdn Id d=lcm,

do sau id ttr l~2mm, cinh thanh thep chir

Bin mil dan dd 1

Bin mat din dd 11

Ban mit d chan din

dd

Ban canh thep chQ 1

Bin bung thep chit 1

Nghien ctiu tim nguyen nhdn vd de xudt gidi phdp khde phue mdi sS

hi4n tupng ton tgi khi van hdnh cua van Ddp Ddy

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Trucmg Dgi hpc Thiiy lai

Ban canh thep chir [

Ban bung thep chir [

Cdi quay bj rd siu tdi 6mm

Ghi chii: Gid tri timg diem do cdc bo phdn kit cdu cira van dugc Irinh bay Irong bdo cdo chuyen ife"Do dac chieu sau in mdn cac phan td chinh d eita van dip

Diy."

II KET QUA DO CHUYEN VI CUTA VAN 3 VA 7

Chuyen vj ciia cua van khi van hanh d cic do md khic nhau, dugc tiSn hinh khio sit do dae eho hai eiia: ciia sd 3 v i cua sd 7 Qua ket qui khao sat, ciia van sd 7 cd chuyen vj lech Idn nen duge chgn de nghien cira trang thii ling suit d dam chinh, phin lire gdi bin le, lire keo van Vi viy trong bio cio chi gidi ban neu cac ket qui

do chuyen vj cua cua sd 7 Chuyen vj ciia ciia 3 xem trong tai heu chuyen ih

2.1 Thiet ke ludi do chuyen vi

De xic djnh chuyen vj ctia cira van theo true dgc phutmg nam ngang v i theo

3-1 4-3

Nghien ciru lim nguyen nhdn vd de xudi giai phdp khac phue moi s6

hien lugng Ion lgi Khi vdn hdnh cira van Dap Ddy

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Truimg Dgi hoc Thiiy lgi

phucmg thing diing khi van hinh chiing tdi da thiit ke mang ludi quan trie bao gdm

cic mdc dugc lim bang cic dinh nhgn khdng ri va dugc hin vio mat ngoai ciia cda van vi lay mui nhgn ciia dinh lim tam

Cic mdc do bin mat ha Itm cira van dugc gin 3 hang dinh song song vdi true dgc cua van, mdi hing duge gin 5 mdc each d6u nhau, rieng hing 1 gin 2 mdc hai diu eiia van (Hinh 2.2)

2.1.2 Ludi do ehuyen vj gian chdng xoin cira van

Giin chdng xoin cua cira van sd 7 dugc gin theo 5 hang song song vdi true dgc cira van, hing 1 v i hing 5 mdi hing dugc gin 2 mdc hai dau ctia van, d hang 2

gin 5 mdc, hing 3 dugc gin 9 mdc cich Siu nhau v i hing 4 gin 5 mdc cich ddu

nhau (Hinh 2.3) Nhu viy sd mdc dugc gin tren bin mat ha luu v i tren gian chdng xoin cua cita van sd 7 li 35 mdc Tren mdi mdc da sii dung gucmg giiy dit chinh xic vio cac diem dinh cita mui dinh Sir dung may toin dac dien tii TC-1800 so miy LG 3475 do hing Leica Thuy Sy sin xuat (hinh 2.4), cd do phdng dai x30 vi

dg chinh xic (che do do ehuin Standard)

9

Hilili; 1

Hail;

l l i i i i p l

Hinh 2.3 So dd bd tri cac mdc quan trie tren din chdng xoin cira sd 7

Nghien cwi lim nguyen nhdn vd de xudt gidi phdp khde phue moi s6

Men lucmg ion lgi khi vdn hdnh cita van Ddp Day

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Trudng Dgi hoc Thiiy lgi

Tat ci cie vj tri cua cie mdc tren mat ha luu deu dugc xic dinh d trong he tga

dg thdng nhit vi do cao dugc la\ tir mgt diem mdc de cd the so sanh trong ciing mgt he eao do

2.1.3 Ludi do chuyen vj cic bin le true cita van

Hinh 2-4 May loan dac dien tu LEICA TC- 1800

De xic djnh do khdng ddng true ctia 17 cdi bin le cira sd 3 v i 7, chiing tdi da ditng de ren van vio cic Id cua true quay de xic djnh tim true d hai diu cic ban Id Nhu vay mdi cua cd 34 mdc v i dugc ky hieu theo thir tu 1, 2, 3 17 tir trii qua phii (tinh tir phia ha luu dip nhin len) kem theo chir P hoac chir T (ben phii hoac ben trii ban le), sau dd sti dung miy toan dae dien tir LEICA TC- 1800 vi guong giiy

dit tai hai mdc (d ben phii v i trii mdi ban le) ii xic djnh toa do X, Y va Z cua cic

aim nay Tren ea sd tga dg vi do cao cic diem nay dua vio true chinh de xac dinh

do lech true cua cic bin le

2.2 Ket qua do ehuyen vi

2.2,1 Ket qua do chuyen vi ban mat cira so 7

Chuyen vj d mdi diem mdc tren mdi hing tuong img vdi mire l(dinh van d cao trinh 9.0), mire 2(10.35), mile 3(11.70), mire 4(12.90), mire 5(13.90) tren mat tran (bin mat ha lim) dugc ghi trong bang 2-2 vi bieu diin tren dd thj tir hinh 2-5

Ket qui do chuyen vj eho thiy chenh lech hai dau van dugc the hien trong bing sau:

Ngiiien ctru lim nguyen nhdn va de xudt gidi phdp khac phue moi sti

hien luang ion lgi khi van hdnh cira van Ddp Ddy

Truang Dai hpc Thuy lai

- 0,073

- 0,092 Til bing cho thay chenh lech hai diu van d cira sd 7 la Itin hem ctia sd 3 Vl viy de tinh loan ndi lire, img suit, chuyen vi khi eita van lech ta chgn ciia sd 7 de tinh loan

2.2.2 Ket qua do chuyen vj dan chdng xoin cua s6 7

Chuyen vj d mdi diem mdc tren mdi hang eita din chdng xoin tucmg iing vdi mure Kdinh van d cao trinh 9.0), miic 2(10.35), mire 3(11.70 , mite 4(12.90) miic 5(13.90) dugc ghi trong bang 2-3 Cic ket qui do dac ehuyen vj gian chdng xoan cua cila sd 7 xem phu lue A (Hinh 2-8 -:- 2-12.)

Theo ket qui do trong bing 2-3 cho thay:

Cac hang 1-5 v i hing 2-4 ddi ximg hinh hgc qua hing 3 nhtmg chuyen vj thing dimg etia cic cip ddi khdng ddi xiing thim chi cd diem cdn phin ddi ximg nhu cac diem 3 cua hing 2 v i 4 Dieu dd chimg td din chdng xoan bj van vd dd Chinh hien tugng niy se tao ra md men xoan trong cie thanh d din ehdng xoan

2.3.1 Ket qua do dg khong dong true

Cic cda van dugc quay quanh true dugc gin bdi 17 bin le, mdi bin le dii

khoing 26-27cm De do vj tri cic diem tim true bSn trii vi bdn phii cua mdi bin \i,

lin lugt xac dinh tga do X, Y va dg cao Z cac diem mdc tim true ben phii va ben trii ciia eac bin le bing miy toin dac dien tii Ket qui khio sit cho thay cac gia tri tga dg vi do eao eic mdc tim true ben trai vi phii cua bin le cua sd 7 dugc the hien trong bing 2.4 Tren co sd liy tim true dilm diu vi cudi lim chuin quy cic diem khic ve theo he tga do mdi niy theo phep chuyen Helmet ta cd do lech theo phucmg ngang v i phuong diing cic diem tim true ben trai v i ben phai ciia cic bin le so vdi true quay chuin (bing 2-5) Hinh anh lech true dugc the hien tren hinh 2.8, 2.9 Cic ket qui do dac cira sd 3 xem bio cio ehuyen de " Ket qui do chuyen vj cira sd 3 v i sd 7 Dip D i y '

Ngiiien ctru lim nguyen nhdn va de xudi gidi phdp khde phue moi sd

hien luang Ion lai khi van hdnh cua van Dap Ddy

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