垫层厚度及压缩模量对刚性、半刚性桩复合地基的影响性能研究  

Influence of cushion thickness and compression modulus on property of composite foundation

作　　者：孙莹[1] 高轩能[2] 

机构地区：[1]南昌市公路管理局青山湖分局,江西南昌330077 [2]华侨大学土木工程学院,福建泉州362021

出　　处：《南昌工程学院学报》2009年第6期60-66,共7页Journal of Nanchang Institute of Technology

摘　　要：现以土力学和弹性理论为基础推导出了刚性、半刚性桩复合地基的竖向变形协调方程,应用Berrum公式计算桩侧摩擦阻力,从理论上建立了垫层厚度及压缩模量对刚性、半刚性桩复合地基性质和形状影响的数学表达式.在此基础上,得出了不同的垫层厚度及垫层模量对桩土应力比、桩身最大应力位置、桩身最大应力、桩土荷载传递的影响,这与工程实践中的数据相符.利用该方法可对刚性、半刚性桩复合地基进行优化设计.Based on soil mechanics and elastic theory, the correspondence equation of the vertical deformation of the composite foundation with the rigid half rigid pile is derived. The rnathematies formula of the influence of the cushion thickness and compression modulus on the composite foundation with the rigid and half rigid pile is derived. Based on it, the influence of the different cushion thickness and compression modulus on the stress ratio of pile and soil, on the location of the greatest stress and the greatest stress in pile, on the load transfer in pile and soil is determined. This conclusion is consistent with the thickness used in the project. The optimized design of the composite foundation with the rigid and half rigid pile can be performed with this method.

关 键 词：刚性桩 复合地基 垫层 应力比 沉降 

分 类 号：TU433[建筑科学—岩土工程]