被动区加固后基坑悬臂支护桩性状研究  

RESEARCH ON THE EFFECT OF FLOATING PILE WORKING BEHAVIOR IN FOUNDATION PIT EXCAVATING WITH REINFORCED PASSIVE SOIL REGION

作　　者：叶茂[1] 

机构地区：[1]杭州市城建设计研究院有限公司,杭州310027

出　　处：《低温建筑技术》2009年第4期88-90,共3页Low Temperature Architecture Technology

摘　　要：基于弹塑性损伤本构模型和Mohr-Coulomb弹塑性本构模型,在桩侧与桩周土体之间设置了能够反映二者脱离的接触单元,采用有限单元法分析了桩前被动区加固与否时悬臂支护桩在基坑开挖时工作性状。结果表明,对桩前土体进行加固处理后,桩身侧向位移减小明显,而桩身塑性应变增加不是很大,所以为了减小基坑开挖对周围环境的影响应在桩前被动区的土体进行加固处理。Based on elasto - plastic damaged constitutive models and Mohr - Coulomb elasto - plastic constitutive models, the finite element method was adopted to analysis the floating piles＇ working behavior in foundation pit excavating with reinforced passive region or not. In modeling, the contact element was taken to emulate the state of stress and deformation of soil around the pile. The result indicates： with passive soil region reinforced, the deformation of the pile can be minished while plastic strain increases a little. Therefore, the soil in the passive region should be reinforced in order to restrain the bad effects of foundation pit excavating.

关 键 词：基坑开挖 被动区加固 有限单元法 Mohr-Coulomb弹塑性模型 接触单元 

分 类 号：TU473.1[建筑科学—结构工程]