r r Hpi nghi khoa hoc kT thuat md quoc te 2010 Cong nghiep mo tien tiin vi su phdt trien ben virng N G H I E N CTJTJ A P D U N G C O N G N G H E C H O N G G I U * CAC DlTCTNG LO CO DAT DA NOC NIPT NE[.]
Hpi nghi Cong nghiep r r khoa hoc kT thuat md quoc te - 2010 mo tien tiin vi su phdt trien ben virng N G H I E N CTJTJ A P D U N G C O N G N G H E CHONG GIU* CAC DlTCTNG LO CO DAT DA NOC NIPT NE DE SAP DO 11 12 GS T h S Zhang - W e n j u n Wangdong Z h a n g - m i n g x u , L i - y u n h a o T r u o n g D a i hoc k y thuat L i e u N i n h ; C o n g t y T H H H dien than SonTay, C o n g t y T N H H l u y e n than Son T a y ( T r u n g Q u o c ) Tdm tat: Khdi niem duoc dua bdi bdo doi voi viec chong giir dudng Id cd ddt dd ndc nut ne de sap do, dua tren co sd phan tich chi tiet cdc dir lieu dia chat cua dudng Id, ly thuyet ve chdng giir dudng Id phii hop vdi tinh hinh thuc te ciing dd duoc cung cap vd lua chon cdng^ thirc phii hop O cdc dieu kien dia chat hoac chdng giir khdc nhau, phdn tich mo phong dudng Id bdng phdn mem sd cd the thu duac dp lire dd gan ke, sir dich chuyen, phdn bd ciia cdc khu virc dirt gay cdc dudng Id duoc chdng giir bang neo hoac neo cap dieu kien dp luc md vd loai ndc khdc Moi thdng sd thu duoc tir viec phdn tich md phong bang sd cd the la co sd cua viec tinh toan chdng giir bdng neo hoac neo cap Gidi thieu Vach true tiep cua via than tai md than Zhenchengdi cua Cdng ty, TNHH dien than Tay Son bao g d m l d p cd chieu day tir m + m So v d i vach true tiep thdng t h u d n g d dieu kien d n d i n h t r u n g b i n h t h i bien dang noc tang tir % den % v a k h u vuc dut gay tang tir % den % D a x u n g quanh cd t i n h o n d i n h k e m va bien dang m a n h k h o n g chi gay khd khan cho viec chdng l d ma l a m mat an toan va t r i n h t u san xuat Chong giu Id kieu truyen thdng ludn duoc sir dung d dudng ld tuong tu ciia md nhung cd m o t so van de n h u bien dang da x u n g quanh, ket qua c h d n g g i u k e m , c h i p h i cao De giai quyet van de cdng t y D i e n Than Tay Son bat dau tien hanh nghien c u u cung v d i t r u d n g dai hoc t r o n g nude O cac dieu kien thuc te va tren c o sd phan t i c h cdng nghe chong g i u d u o n g Id v a quy t r i n h k y thuat, cac p h u o n g phap phan t i c h v a t i n h toan l y thuyet, md phong bang sd, quan trac ap luc se duoc ap dung t r o n g bai bao D d n g t h d i , se sir dung neo c u d n g c a o , , l u d i k i m loai, dam thep va neo cap de c h d n g g i u d u d n g l d Sau nam ap dung tren thuc te, cdng tac khai thac k h o n g chi dien an toan v a hieu qua ma mang lai l o i i c h ve mat k i n h te, k y thuat va xa h d i dang ke Thiet ke thu* nghiem chong giir duong 16 Theo nguyen tac ket hop chdng g i u lien ket bang neo hoac neo cap va yeu cau ciia cong nghe chong g i u t h i p h u o n g phap m o phong bang so duoc sir d u n g t r o n g thiet ke ban dau ciing v d i viec phan t i c h l y thuyet va su t u o n g ddng ve k y thuat 1.1 Nguyen ly chdng giir vach kit hop vdi neo va neo cap di dap irng tinh hinh hien tqi 1) Tang kha nang chiu tai cua khoi chong giu dat da bang neo bang each tang cudng lien ket v d i dat da gan ke Khu vuc chdng giu bang neo deo d phia ngoai cac khu vuc da dut gay gan ke cu the la chieu dai neo l d n h o n chieu sau cua k h u v u c da dut gay gan ke g i u p neo duoc sir dung hoan toan de gia co dat da nong gan ke N e o cap cq c u n g i m g luc trudc phii hop v d i neo l a m tdng chieu day ciia l d p c h i u luc chdng g i u bdng neo, tang cudng kha nang c h i u tai cua k h d i chong g i u bang neo 351 Hdi Cong nghi khoa nghiep hoc md tien ki thudt tien md qudc vi su phdt ti - trien 2010 bin vung L -, Lz v a h l a n l u o t la chieu dai neo, chieu dai gia cp, sau cua k h u virc dut gay gan ke B e gia co da gan ke m o t each h i e u qua t h i c h i e u dai neo nen la LD>ho+L D z 2) N e o cap l a m n g i r n g dat da k h o n g o n d i n h de ngan ngira tai nan sap 16 Kha nang chiu luc cua neo cap nen Ion hon luong da cac khu vuc dut gay noc Co the n o i rang ben keo k y thuat cua neo nen I o n h o n t a i t r o n g treo de cho neo co the hoan toan treo d u o c da r o i gan ke va ngan ngira sap 16 Cac ket qua mo phong bang so cho thay hinh dang cac khu vuc dut gay noc giong h i n h Parabon, cao v o m bang sau cua cac k h u v u c d u t gay n h i e u nhat khoang 1,5 lan chieu rong d u o n g 16 V i biet d u o c t r o n g l u o n g da tren m o i met o cac k h u virc dut gay noc va ben keo k y thuat cua neo, theo cac yeu cau ve t r o n g l u o n g da cua k h u v u c dut gay noc treo t h i so neo tren m o i met bang 0,19 lan sau cua k h u v u c d u t gay I o n nhat va bang mot nira r o n g d u o n g 16 3) Do dan dai ky thuat cua day neo phai phu hop voi bien dang da gan ke tai khu vuc treo Do dan dai ky thuat cua neo cap noc nen Ion hon bien dang da gan ke tai khu vuc treo dieu co the ngan ngira sir qua tai cua neo cap ap l u c b i e n dang I o n Cac ket qua mo phong bang so cho thay he so giira dich chuyen da noc U/ neo cap ben va sut noc U la k h o a n g 0.35 B i e n dang da la U k h u v u c treo cua neo Neu Ls va Fy la neo cap ben t r o n g va irng l u c t r u o c t h i dan k y thuat cua neo cap la e = 1.8%, v i vay chieu dai day neo Los la: ms T -T r UAU Li rjn — Li\ T Li-x T 398 - F r r r 1.2 Dinh nghia phuong phap chdng giir co ban va cdc thdng so chdng giir chinh Tren co so dinh nghTa ve cac nguyen tac chong giu noc ket hop voi neo va neo cap, m o t so each c h o n g g i u duoc so sanh bang he t h o n g phan t i c h x i r l y sut 16 dat da Ophah m e m t i n h toan R F P A ) C u o i cung, b i e n phap chong g i u t o i u u da d u o c xac d i n h : neo, d a m thep va l u o i , neo cap d u o c sir dung de gia co Co the t h u d u o c cac ket qua tir cac thir n g h i e m bang so ve su phan bo k h u virc d u t gay da gan ke v a p h a n bo bien dang Sau co the t i n h toan cac t h o n g so chong giir c h i n h va lira chon neo v a nguyen l y chong g i u neo cap n h u sau D S r Bang Cdc kit qua md phong K h u vuc Sut noc / m m su bien dang dd gan ki va phan D i c h chuyen noc 6m /mm bo cdc khu vuc dut gay D o sau cua cac D o sau ciia cac k h u virc dirt gay k h u vuc dirt noc / m gay hong 16 /m G i u a neo 89 28 1.65 2.55 Thanh neo 52 21 1.50 1.05 Trung binh 71 25 1.60 1.80 Tren co so cac ket qua m o p h o n g , co the thay duoc c h i e u dai neo la m, khoang each v a k h o a n g each hang la 0 0 m m , dai neo cap la 6,5m, k h o a n g each via than la , m , so cho m o i hang, dai cua neo h o n g 16 l a 1,8, k h o a n g each va khoang each hang 800>