- Lap bao cao khao sat Khi tu g Thug van 3 Khao sat dia hinh lap NCTKT tuy6n DDK 500k
6. Khdo sat ki6m tra toan tuy6n DDK lAn
a) Kim tra tinh dung din, chinh xac cila tai lieu khao sat.
b) Hi@.1 chinh lai vi tri tuy6n cong trinh cho phi.' hgp vai thuc t6, a cong trinh có tinh kha thi hcm.
c) Thanh ph'in tham gia khdo sat g'om CNDA, CNKS va chil tri khdo satithi6t Ice cac chuyen nganh lien quan.
7. Bao cao k6t qua khdo sat xay dung phuc vu lap NCKT
Bao cao k6t qua khao sat xay dung dam bao cac not dung nhu Quy dinh tai Khoan 6, Dieu 43 dm Quy dinh nay. Bien the Bao cao ket qua khdo sat xay clung tham khdo a phan Phu luc 4 — luc cac cong trinh luai di'n.
Dieu 45. Khdo sat 14p TKKT DDK cap dien ip 110kV 4- 500 kV
1. Muc dich khao sat
Cung cap cac tai WO khdo sat day dii, chi tit ve dia hinh, dia chit, khi tugng - till:1y van oh tuyen duo.n.g day dugc chon va phe duy'e't lam co so. tinh toan cac giai phap thiet ke, to chfrc xay dung va lap tong du toan.
2. Thanh phAn khdo sat 1613 TKKT DDK 110kV ± 500 kV a) Khdo sat dia hinh
- Do dac, phan tru trung gian tai thuc dia.
- DiL tra, do dac b6 sung dia hinh, dia vat... phat sinh phuc vu cong tac ki6m tra va hi:0 chinh thiet ke
- Do ve ho4c trich xudt tren ban de) khong anh n6u phucmg an ky that khdo sat bang cong ngN khdo sat khong anh binhd)dia hinh tST l' 1/200 vai khoang cao d'eu duang dong mire 0,5m cac vi tri cot có thiet ke san gat — ke mong.
- Lap bao cao khdo sat dia hinh b) Khao sat dia chit
- Tham de DCCT (tai cac vi tri cot c10, cac vi tri có kha nang sat truv't, cac vi tri cla khoan a giai °loan NCKT nhttng china di chieu sau hojc so hiving yeu cau)
- Do din to. sudt cua ddt Din
- Khao sat ngu'on vat HO xay dung dia phuang - L4p bao cao khao sat dia chdt
* Trit.&ng hop tuyin cat qua Wing có cliu kien cilia chat cong trinh cac biet nhuw cac-ta, hoat clOng tan kien tao, tai bien cilia chat quy mo loin thi thy.c hien theo cac chi dan k9 thuOt chuyen nganh va phai cluvc cliii clau tic phe duyet.
c) Khao sat Khi tugng - Thug van
- Thu thap va dieu tra b6 sung cac thong s6 Khi tugng - ThuS, van - L4p bao cao khao sat Khi Wong - Thug -van
3. Khdo sat dia hinh lap TKKT cho DDK 110kV ± 500 kV a) Do dac, phan tru trung gian tai thgc dia
- Dua timg vi tri cot thie't k6 tren ban ye ra thgc dia bang thi6t bi do dac dia hinh hoac trich xuat tren ban do khong anh neu phuang an ky that khao sat bang cong ngN khao sat khong anh.
- Danh ddu, chon m6c bang be tong tat ca cac vi tri cot:
+ Vi tri cot goc neo: Thgc hiin theo chi clan Khoan 3.1 - Di6u 44 cua Quy dinh nay.
+ Vi tri OA trung gian: ChM m6c be tong có lai thep tai tim vi tri cot. M6c bao
NT' truOc va sau duck danh clan bang c9c go.
-, Khi cam OA trung gian, ne'u phat hi'n thay nhang vi tri OA ma mong cua chimg có the anh hue:mg den cac cong trinh da có nhu clueing giao thong, ao ho, kenh muang, nha cira va nhang cong trinh khac, hoac gan nhimg lyZy xoi 16..... ngtrai do dac phai bao cao vai CNTK bi6t d6 diL chinh, khong tax ST di6u chinh. Sau khi coy ki6n dm CNTK ti6p tuc do dac cam cot trung gian.
b) Di'eu tra, do dac b6 sung dia hinh, dia vat... phat sinh phuc vu cong tac ki6m tra va h* chinh thiet ke
, - Trong qua trinh phan cot trung gian can tin hanh cap nh4t, diL tra va do dac bo sung cac thay doi, phat sinh ye dia hinh, dia vat, cay col ... tren tuyen DDK de dieu chinh thie't 1(6 ky thu4 cho phii hop.
c) Ve binh d6 dia hinh CST l' 1/200 vai khoang cao cIL clueing dong mix 0,5m - Tai nhang vi tri cot co dO d6c lan han 10° can thi6t k6 san gat hoac Ice mong va cac vi tri co dia hinh phuc tap (gan ao ho, kenh muang, me...) can xir 1ST cot, mong rieng cl&I phai do binh c16 tS71" 1/200. Pham vi do ye:
+ Tai cac vi tri có di'eu ki.'n dia chit on dinh, ye rting v6' m8i ben tim tuy6n 40m va doc theo huong tuyen ye phia truac va sau, m8i phia 40m (cloi vai DDK 110kV ÷ 220kV ye rOng ye moi ben tim tuyen 30m ya doc theo huang tuyen ye phia truac ya sau, m8i phia 40m)
+ Tai cac vi tri co dO doc dia hinh lan han 20° hoac di6u kien dia chit kern on dinh, (sat, tnrot la, hoac co nguy ca sat la, cau tao lap dat (Id mem yeu, mai ho mong
mor rOng ho;ac phai thie't ke bin phap xir pham vi do ve binh do co the can ma rOng han va dugc Juan chdng 1.6 trong Nhiem vu khao sat.
d) Lap bao cao khdo sat dia hinh
- Lap bao cao ket qua khao sat dia hinh thuye't minh, cac phu luc, ban ve, ban tinh, bang thong ke va cac tai lieu lien quan.
4. 'ado sat DCCT lap TKKT cho DDK 110kV ± 500 kV 4.1 Tham d6 DCCT
a) Bo tri khoan dao than). do DCCT
- Cac ho khoan dugc be) tri dung vao vi tri xay dung OA da de xac dinh dia tang tai ,cac vi tri xay dung. Khong qua 3ho/km. Doi vai vang,DCCT don gian, &rig nhat (Dong bang Cr Long, Tay nguyen) c6 the xem xet giam so lugng ho khoan.
- Doi vori cac vi tri cot neo goc da c6 he) khoan trong giai doan khao sat lap NCKT, neu giai phap thiet ke sir dung cot neo 2 than, ho4c3 than tren \rung c6 dieu kien DCCT or mirc trung binh va phirc tap thi can khoan 138 sung them 1 hoac 2 ho khoan de m8i than cot deu co 1 10 khoan phuc vu tinh toan thiet ke.
- Trong tnr&ng hop vi tri cOt ctat tren stroll ckic han 200, cac vi tri cot khoang vuot 16n co dieu kien dia chat phirc tap, vi tri cot tiem an nguy co truot for gay mat on dinh, can bo sung them cac ho khoan, dao de lam 115 so lieu dia chat cling nhu kha nang mat on dinh won d6c. So lugng cac ho khoan dao se dugc 1u4n chUng trong Nhiem vu khao sat.
b) ChiL sau khoan ciao than de DCCT
- ChiL sau ht) khoan phu thuc)c vao cau tao dia chit tai vi tri xay dung cot tren co so ket qua kith) sat giai doan lap NCKT, ket qua tinh toan mong, drib huang cua mong den nen dat va dugc luan chimg trong Nhiem vu khao sat, thong thuong:
+ Doi vai vimg trung du, cfoi nui dimg mOng tru, vi tri dat cot co lop ddt phu voi be day torn, khoan sau tai dual cao do day mong khoang 4 ± 6m, neu lap dat phil co chieu day mong va mong dat tren lop da cirng thi khoan sau clued cao de.) day mong du kien khoang tir 1 ± 1,5m. Luu g, doi vai cac vi tri d4t cot tren stroll doc, chieu sau ho khoan phai tinh them chieu cao san gat mg bang mong.
+ D6i vai yang dAt y'e'u sinh lay, chiL sau 11'6 khoan dtrac xac dinh tren co sa tinh toan so b'() anh huang cua mong den nen dat. Neu du kien rdimg giai phap mOng ban thi
cac ho khoan co chieu sau khoang 12m; Neu dung c9c ch8ng ho4c coc co mui chiu luc
la chinh, chieu sau tham do khong it han 5m cluai mui coc; Neu dimg coc ma sat hoac ma sat la chinh, chieu sau tham do phai vuot qua chieu sau \ding hoat dOng cua mong
khoi Quy uoc duai miii c9c, tori d'() sau ma ling suat cua ding trinh truyen xuong nho
han hoac bang 15% ling suat do trong lugng ban than cila dat gay ra. 4.2 L'Ay mau va thi nghiem
- Lay mau nguyen clang hoac khong nguyen dpg cho tat ca cac lop dia tang trong cac to khoan tham do. Trtrong hop, h6 khoan co 1 lap dia tang holac co be day lap lorn han 3m thi trung binh cu them 3m lay mot mau thi nghi'01.
- S6 lugng mau de phan tich thi ngh*n: thi nghiem b'6" sung a cung cap chi tieu ca 1)"/ cho cac lap dia tang neu co su khac b* so vai mall a giai clop NCKT, ho4c khoang 2km phai co 01 mau cfla ding mot lap dia tang dugc thi nghiem phan tich. Rieng cac lap dia tang du kien dla't mong, trung binh lkm phai co 01 mau clugc thi ngh*n phan tich. Thong thuomg, trung binh , hokhoan tai vi tri db. trung gian du kien co 01 _ dugc thi Doi vai cac yang DCCT don gian, su khac biet giira cac mau khong lan, c6 the giam khoi lacing mau thi
- Quy cach mau, bao quail va cac chi tieu phan tich thi nghim mau ddt da thuc hien theo Khoan 4.3— Dieu 44 dm Quy dinh nay.
- So lugng mau nuac ngAm, nuac mat can dugc lay 1:16 sung theo phan \rang a tong clop tuyen. Truang hop tuyen nam gon trong 1 Yang nuac ngam ho4c nuac mat thi khong can xac dinh them ma dung ket qua da khdo sat trong giai clop truck. Ngodi ra can lay them mau nuac mat yUnglan can tuyen de phan tich nuac , cho Be tong xay dung cong trinh. Phuang phap lay mau, loci mau, quy each mau thuc hien theo chi N
an Khoan 4.3 - Di&I 44 dm. Quy dinh nay. 4.3 Do din tra suit ddt n'en
- Su dung phuang phap do sau di'Oxac dinh din tra suit cua &At nL.
- Doi vai DDK 500kV: yUng tuye'n co diL kien DCCT a cap dan gian va trung binh bi5 sung them diem do a vi tri cot so luting di6rn do khoang 1 diem/3km (bao gOm ca nhfing diem cid do a giai clop truac); \Tung tuyen co di'eu kien DCCT a cap phirc tap bo sung them diem do a vi tri cot cICY, so luting diem do khoang 1 diem/lkm.
- D6i vai DDK 110±220kV: \Tung tuye'n co di6'u kien DCCT a mirc dan gian va trung binh khong can 13.6 sung them diem do; VAng tuy6n co DCCT mi x phirc tap thi phai be) sung them diem do de so luting diem do dat dugc khoang 1 di6m/2km.
4.4 Khdo sat ngui)n vat lieu xay dung dia phuang
- Di'eu tra thuc dia hien trang cac ngu6n VLXD dia phuang, ti'&11 nang ngu'on VLXD trong khu vac du an va viing lan can.
- Danh gia tong the ve chdt luting, trit luting va cu ly cac nguon VLXD. 4.5. 14p bao cao khao sat dia chdt
- Ket qua khao sat dia chk cong trinh g6m: thuye't minh, cac phu lac, ban ye, ban tinh, ket qua phan tich thi nghi'0.1va cac tai lieu lien quan.