粉质粘土变形特性的渗流固结和直剪试验研究  

Study on Deformation Characteristics of Silty Clay by Seepage Consolidation and Direct Shear Tests

作　　者：范丽萍[1] 王云飞[2] 郭俊温[3] 赵晓军[4] 

机构地区：[1]北京市轨道交通建设管理有限公司,北京100037 [2]北京科技大学土木与环境工程学院,北京100083 [3]内蒙古科技大学,内蒙古包头市014010 [4]北京市勘察设计研究院有限公司,北京100038

出　　处：《矿业研究与开发》2011年第1期19-22,共4页Mining Research and Development

基　　金：国家自然科学基金资助项目(50074002)

摘　　要：为满足工程建设的需要,对某市高新区表土层进行了渗流固结和直剪试验研究。试验测定了土体的基本物理性质指标并命名为粉质粘土;在一维固结渗流试验中测定得出土体的压缩系数为0.38 MPa-1、压缩指数为0.28,确定土体为中性压缩性土;得到了土体在各级压力下的变形曲线和竖向应变;在直剪试验中测定了土体在不同竖向压应力下的抗剪强度及土体的粘聚力和内摩擦角,为该地区的工程建设及建筑物的沉降分析提供了土体的基本参数。In order to meet needs of engineering construction,seepage consolidation and direct shear tests of surface soil from a high-tech zone in a city were carried.The indicators about the basic physical properties of the soil were determined,and called as silty clay in the test.In the one-dimensional seepage consolidation test,tested compression coefficient of the silty clay is 0.38 MPa-1,tested compression index of it is 0.28,it was identified as neutral compressive soil,and the deformation curves and vertical strain under pressure at all levels were obtained.In the direct shear test,the shear strength of the silty clay under different vertical pressures and its gotten cohesive strength and internal friction angle were determined.These tests provided the basic parameters of soil for the engineering construction and settlement analyses of buildings in the region.

关 键 词：粉质粘土 变形特性 渗流固结试验 直剪试验 

分 类 号：TU41[建筑科学—岩土工程]