^^_ KHOA HOC VA CfiNG NGHl MO (NGHIEN CUU VA XAC DjNH KET CAU CHONG GlffTOI UU KHI X^V DlTNG CRC D U d N G HnM TICT DI€N L N BANG S DO HA BAC TS T R A N T U A N MINH - Tnrdng D^i hfc Kld-DIa ehit ThS NGUYEN H O U S A - Trwimg D^i Ape Ba Ria-VBng Tau gdy vi$c xdy dung d c dudng him d ehilu rflng 6+10 m vd chllu cao 8+10 m thudng sir dgng so d i khai ddo hg b$c d l ndng cao tic dfl khai ddo cOng nhu ldm giam tdc dflng din khii dd xung quanh dudng him Cde ly thuylt phdn tich trude ddy thudng dupe glal quyet trgn ca sd dudng him dgng trfln vd su dgng budc khai ddo mfli trudng ddn hll, ddn hii deo [1], [2], [6] hojc dec cho dit dd cirng vO'ng vd dit dd mim yiu [3], [4], [5], [7] Tuy nhign, trgn thgc t l hinh dgng cua d c dudng him khflng phai id dgng trfln md cfl nhilu logi hinh dgng khde Chlnh vl v5y md vl$c nghidn edu ddnh gid trgng thdi ung suit biln dgng vd iga chpn cdc ket clu ching gifl' phii hpp xung quanh d c dudng ham cfl tilt dign Idn khai ddo bang sa d i chia guang hg N b^c phgc vu cflng tdc phdn tich vd thilt k l i n djnii ede dudng him Id v i n d l cin thilt vd cfl tinh thiit thgc Trong bdi bdo ndy chi vi$c nghign cirl trgng thdi dng suit biln dgng xung quanh dudnl him chia guang mfli trudng dit dd d ^ nhit vd iga chpn kit d u ching t i i uu trgn co s l phuang phdp s i Cac thdng s i ddu vao cho phdn tich Gia thilt mflt dudng ham cfl ehilu rflng khai ddfl 10 m, ehilu cao dudng him khai ddo m dupe xdy dgng khii dit dd liln khii, lidn tvc vdi hd s l kign c i d i t dd f=3 vd cdo d^c tinh nhu Bang Chiiu sdu ddt dudng him SO m So^ d l 1;^ thuygt cOa bdi todn dupe the hlfln nhu tronj hinh H.1 • J ' ' n 10 H Sa dd bdi todn /y thuyit cho phdn tich CONG NGHIlP mo stf 1-2015 N\ ' KHOA HOC VA CtfNG NGHE MO _^^ Bdng Cdc tham so dung dac tinh vo U tong phun (Bang 3) Bdng Cac dac finh vd chdng be tong phun Ten c^c tham s6 Loai vat li^u Mddun dan hoi Chieu day Hd s6 Poisson Ky hidu Tinh chit E d \^ Bon vi Dan hdi 32000 Thay ddi 0,2 GiS trj' MPa m IS H.6 Phdn bo chuyen vj tong the tren bien ham theo cdc bui5'c khai dao vdi chieu day be tong phun khdc nhau: a - B€ tong phun d=5 cm; b Bd tdng phun d=25 cm Sau phSn tich b^ng phin mem so chiing ta nhgn dyoc phan b6 va gi^ trj cua i^ng suit vS chuyen vj xung quanh Swimg him cung vdi c^c bu'oc khai dao du'ong him c6 sip dyng ket c^u chong la neo va be tong phun, k^t qua du'g'c th^ hJ0n nhu'trong hinh H.11 va 12 v^ Bang Bing phan tich cung e6 the quan sat duoc sy bi§n do! ciia vung pha huy xung quanh du'ong h^m c^c byoc khai dao khac cung voi sy thay doi cac dac tinh ket ciu chong giO' khac (quan sat hinh H.7) Sau phan tich co the thiet lap dy^c m6i H.5 Kit qua phan bd ung suit thing dung xung quan he quy luat glQ-a icng suit va chuyin vi trfin quanh du^ng him dwac chdng giO-bang neo 2,5n6c cua duong him voi sy thay d6i cac tham so m (axa=1,5x1,5 m) be tdng phun cm: a - Bum: ket cau chong giCf du'ong ham, ket qua du'oc the 1; b - Bt«5c hi^n nhu-trong hinh H.8, CtfNG NGHIEP md stf - KHOA HOC VA CflNG NGHE MO Bdng Gii tri img suit a,, 05 vi ehuyin vl ting thi tai cic diim khdc trdn bidn cua audng him thay ail chiiu ddy bd tdng phun TT Budc Budc USBD Ol az u, ''^