地基土参数对旋喷群桩复合地基承载特性影响的数值分析  

Numeral Analysis of Influence of Soil Parameters on Bearing Characteristics of Composite Foundation Formed by Chemical Churning Pile Groups

作　　者：安关峰[1] 张洪彬[1] 刘添俊[1] 

机构地区：[1]广州市市政集团有限公司,510060

出　　处：《特种结构》2010年第6期42-45,共4页Special Structures

摘　　要：旋喷桩加固软土地基的方法目前在各种地基处理工程中得到了越来越广泛的应用。对旋喷桩的研究多数集中在其施工工法的改进上,而在地基土参数对旋喷群桩的承载特性影响方面则研究不多。本文根据工程实际情况,采用基于MIDAS-GTS的三维有限元分析技术,通过改变旋喷群桩复合地基中桩土接触面系数以及地基土的弹性模量、内摩擦角和粘聚力等相关材料参数,对旋喷群桩复合地基随这些参数变化而表现出来的承载特性进行了研究。通过本文的研究,可为实际工程中进行旋喷桩复合地基处理提供参考。The method of soft soil foundation reinforcement with chemical churning pile is used more and more in the project of foundation treatment. At present, the research about chemical churning pile is usually focus on improvement of the construction method, but research about bearing characteristics of chemical churning pile groups is not ordinary . Based on the practical project situation, the FEM analysis based on MIDAS-GTS is used in this paper to research the change of bearing characteristics when parameters of chemical churning pile groups and the pile-soil inter-face coeffcient are changed. These soil parameters include modulus of elasticity, angle of internal friction, cohesion, initial contact stiffness and so on. The research results can provide some references for actual projects in which the method of soft soil foundation reinforcement with chemical churning pile is used.

关 键 词：旋喷桩 复合地基 承载特性 数值分析 

分 类 号：TU473.1[建筑科学—结构工程]