开挖过程及桩锚间距对遮帘式支挡结构影响数值模拟分析  

Numerical Simulation Analysis on Excavation and Pile Anchor Spacing of Barrier Structure

作　　者：赵晨羽[1,2] 朱珍德[1,2] 曹加兴[1,2] Zhao Chenyu;Zhu Zhende;Cao Jiaxing(Key Laboratory of Ministry of education for Geomechanics and Embankment Engineering,Hohai University,Nanjing 210098,China;Jiangsu Research Center for Geotechnical Engineering Technology,Hohai University,Nanjing 210098,China)

机构地区：[1]河海大学岩土力学与堤坝工程教育部重点实验室,南京210098 [2]江苏省岩土工程技术工程研究中心,河海大学,南京210098

出　　处：《河南科学》2017年第1期105-110,共6页Henan Science

基　　金：国家自然科学基金资助项目(51379065,51579081)

摘　　要：遮帘式支挡结构是近几年来在我国贸易飞速发展、产业结构调整等动力驱动下,大型水利工程、城市深基坑开挖等不断向现代化、大型化、深水化方向延伸而发展起来的一种新型支护结构.与原支护结构相比,在支挡结构后增加了一排遮帘桩.运用有限元分析软件ABAQUS建立三维遮帘式支挡结构模型,通过模拟港池开挖以及改变遮帘桩与后端锚定结构间距,分析对遮帘式支挡结构工作性状的影响.结果表明:基坑开挖过程中,前端支护结构侧向位移变化明显,遮帘桩的设置充分利用了土体自身抗剪力学特性,遮帘效应明显;桩锚间距D在一定范围内对遮帘式支挡结构侧向位移、土压力大小影响呈现由大变小再变大的过程,即存在一个最优桩锚间距.With the rapid development of China’s trade,industrial restructuring and other power-driven in recent years,large-scale water conservancy projects,urban deep excavation and so on extend to keep the modern,large,deepwater when the barrier structure arises at the historic moment. Compared with the sheet pile structure,the wall structure adds a row of barrier piles after it. Using the ABAQUS finite element software to establish 3D barrier structure analyzes the effect of work traits for barrier structure by simulating basin excavation and pile anchor. The results show that the wall lateral displacement changes significantly. Setting barrier piles take the full advantage of the mechanical properties of the soil shear itself. The effect of the barrier structure becomes more obvious. Pile anchor spacing Ds in a range of barrier structure lateral displacement. The soil pressure influences the size from large to small and then renders larger process,which means that there is an optimal pile anchor spacing.

关 键 词：遮帘式支挡结构 港池开挖 有限元分析 桩锚间距D 

分 类 号：TU43[建筑科学—岩土工程]