船闸闸室结构刚性桩加固地基承载特性分析  

Bearing characteristic analysis on lock chamber with rigid-pile strengthening foundation

作　　者：李成强 陶桂兰[2] 曹称宇 

机构地区：[1]中交第三航务工程勘察设计院有限公司,上海200032 [2]河海大学港口海岸与近海工程学院,南京210098

出　　处：《水道港口》2017年第3期263-268,共6页Journal of Waterway and Harbor

摘　　要：结合东部沿海地区某刚性桩加固地基船闸工程,运用ANSYS软件分别模拟一体式和分开式桩基加固地基船闸闸室结构,接触面均采用库伦摩擦模型,对两种桩基加固地基闸室结构分别进行闸室底板沉降与地基沉降、桩身竖向应力、桩身水平位移以及桩土荷载承担比共4个方面的对比分析。研究表明:一体式桩基加固闸室结构在一定程度上有利于减小闸室整体沉降和地基沉降,素混凝土垫层起到一定的调节作用;一体式桩基加固闸室结构桩基承担的竖向荷载大于分开式,土承担的荷载比例小于分开式;两种结构桩身水平位移沿桩基入土深度的变化趋势一样;分开式桩基加固闸室结构在一定程度上有利于减小闸室底板弯矩。Based on the ship lock with rigid-pile in the east coastal area,Coulomb friction model was used as the contact constitutive model and the finite analysis software ANSYS was used to establish two kinds of lock chambers with rigid-pile. Sedimentation of lock chamber＇s floor and foundation,vertical stress of the piles,horizontal displacement of the piles and distribution of the load ratio of pile-soil were analyzed in comparison. The research shows that the one-piece lock chamber with rigid-pile can reduce sedimentation of lock chamber＇s floor and foundation to some extent, and the plain concrete cushion layer is of some use to adjust the sedimentation. The piles of one-piece lock chamber with rigid-pile can bear more loads than the separated lock chamber with rigid-pile,but the foundation can only bear less. Piles of the two different forms of lock chamber with rigid-piles have the same change trend on the horizontal displacement. Separated lock chamber with rigid-pile can reduce the bending moment of lock chamber＇s floor to some extent.

关 键 词：刚性桩 加固地基 闸室 接触模型 承载特性 

分 类 号：U641.3[交通运输工程—船舶及航道工程] TV331[交通运输工程—船舶与海洋工程]