大型深水基础施工方案研究 [复制链接]

大型深水基础施工方案研究于祥君1 , 戴宗诚2(11中铁大桥局集团第二工程有限公司,南京　210015; 21中铁大桥局集团有限公司,武汉　430050)QBxS^Y¦qbbs.3c3t.com«Äãó‰çâåö
摘　要:介绍大型深水基础施工方案的研究,包括双壁钢吊箱围堰定位方案的比选、重型锚碇系统的设计和布置等。QBxS^Y¦qbbs.3c3t.com«Äãó‰çâåö
关键词:深水基础; 双壁钢吊箱围堰; 锚碇系统QBxS^Y¦qbbs.3c3t.com«Äãó‰çâåö
中图分类号:U445155 + 6 　　文献标识码: BQBxS^Y¦qbbs.3c3t.com«Äãó‰çâåö
文章编号: 1004 2954 (2005) 06 0034 04QBxS^Y¦qbbs.3c3t.com«Äãó‰çâåö
Study of Con struction Scheme for Large2sca le Deepwa terFounda tionYu X iangjun1 , Dai Zongcheng2QBxS^Y¦qbbs.3c3t.com«Äãó‰çâåö
Abstract　This paper p resents the study of construction scheme forlarge2scale deepwater foundation, including the alternative of locatemode for double2wall steel boxed cofferdam, design and arrange2ment of heavy anchorage system.QBxS^Y¦qbbs.3c3t.com«Äãó‰çâåö
Keywords　deepwater foundation; double2wall steel boxed coffer2QBxS^Y¦qbbs.3c3t.com«Äãó‰çâåö
dam; anchorage system Author’s address　The 2nd Engineering Company of ** Rail2 wayMajor Bridge Engineering Group Co. ,L td. ,Nanjing　210015QBxS^Y¦qbbs.3c3t.com«Äãó‰çâåö
1　概述QBxS^Y¦qbbs.3c3t.com«Äãó‰çâåö
111　工程概况QBxS^Y¦qbbs.3c3t.com«Äãó‰çâåö
拟建某特大桥一主墩在主河槽深泓线附近。墩位处常水位+ 7100 m 时水深约44 m,基础采用46 根<218 m钻孔灌注桩,桩按纵向5排,横向10列布置;承台为圆端型,圆端部分直径34m,平面尺寸: 76100m(横桥向) ×34100 m (顺桥向) ,底面高程- 1310 m,顶面高程- 7 m;承台厚610 m。QBxS^Y¦qbbs.3c3t.com«Äãó‰çâåö
112　水文地质情况QBxS^Y¦qbbs.3c3t.com«Äãó‰çâåö
(1)水文情况QBxS^Y¦qbbs.3c3t.com«Äãó‰çâåö
桥址处河段位于长江下游感潮区内,水流既受上游径流影响,又受潮汐影响。潮汐为不正规半日潮,潮差较小。水流为单向流,水流与桥轴线法向夹角约3°。一般每年5～10月为汛期, 11月～次年4月为枯水期。5月～10月间施工设防水位+ 810 m。11～次年4月间施工设防水位+ 510 m。冲刷:施工期间一般冲刷线按冲刷至高程- 47 m考虑;局部冲刷按5 m考虑。QBxS^Y¦qbbs.3c3t.com«Äãó‰çâåö
详细内容见下面附件：QBxS^Y¦qbbs.3c3t.com«Äãó‰çâåö