摘要
首先介绍了旁压试验的原理和其构造;其次,通过对不同埋深条件下粉质黏土和淤泥质土的旁压曲线进行分析,并计算得出相应的地基承载力和压缩模量;最后,和静力初探试验中地基承载力和变形模量进行对比分析。结果表明:其旁压曲线主要分为三个阶段:第一阶段为初始阶段受到成孔作用下土体受到扰动,致使土体快速压缩,第二阶段为弹性阶段,第三阶段为土体塑性变形阶段;通过旁压试验测得土体地基承载力可以乘以相应土体的折减系数;得到相应土体下压缩模量和变形模量之间的换算系数。
Firstly,the principle and structure of the pressure test are introduced.Secondly,through the analysis of the pressure curves of silty clay and silty soil under different buried depth,the corresponding bearing capacity and compressive modulus of the foundation are calculated.Finally,the ground bearing capacity and deformation modulus of the static and preliminary experiments are compared and analyzed.The results show that the curve of the pressuremeter test is mainly divided into three stages:the first stage is the initial stage,the soil is disturbed by the pore formation,causing the soil to compress rapidly,the second stage is the elastic stage,and the third stage is plastic deformation stage of soil.The bearing capacity of the soil foundation can be multiplied by the reduction coefficient of the corresponding soil by the pressuremeter test,and the conversion coefficient between the compression modulus and the deformation modulus of the corresponding soil is obtained.
作者
伍钊源
廖广超
李杰
谢志斌
张李东
黎辉
Wu Zhaoyuan;Liao Guangchao;Li Jie;Xie Zhibin;Zhang Lidong;Li Hui(Guangdong Bureau of Coal Geology Guangzhou 510170,China)
出处
《广东土木与建筑》
2019年第3期42-45,共4页
Guangdong Architecture Civil Engineering
关键词
旁压试验
埋深
地基承载力
压缩模量
变形模量
the pressuremeter test
buried depth
bearing capacity of foundation
compression modulus
deformation modulus
