Experimental study of yield property of clayey soil under unloading

HE Shi-xiu; LONG Li-hua; YANG Xue-qiang; HE Yi

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Experimental study of yield property of clayey soil under unloading

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- Experimental study of yield property of clayey soil under unloading
- Vol. 29, Issue S1, (2008)
- 作者机构：
  
  1. 湖北工业大学,武汉,430068
  2. 广东工业大学,广州,510006
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU43
- Online First：15 April 2016，
  
  Published：2008
- 稿件说明：
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HE Shi-xiu, LONG Li-hua, YANG Xue-qiang, et al. Experimental study of yield property of clayey soil under unloading[J]. 2008, 29(S1).
DOI：

HE Shi-xiu, LONG Li-hua, YANG Xue-qiang, et al. Experimental study of yield property of clayey soil under unloading[J]. 2008, 29(S1). DOI：

摘要

通过扰动的粉质黏土室内固结排水卸载剪切试验，分别得到真三轴和普通三轴侧向卸载条件下的应力-应变曲线。对这些曲线分析可知，它们表现为应变硬化和非线性，其初始阶段呈直线状，很快转变为曲线；真三轴试验（轴向应力为常量、减围压、保持应变 0）相比普通三轴试验（为常量、减，且中主应力），真三轴试验屈服发生在应力差（）值较高、轴向应变值较小处；将试验取得的各屈服点进行整理分析，认为这种土在卸载条件下的屈服表现较适宜于Matsuo-Nakai屈服强度准则。

Abstract

By shear test of disturbed silty clay at true triaxial apparatus and triaxial apparatus under isotropic consolidation drainage and lateral unloading

the stress-stain curves are obtained. Analysis shows: these curves are nonlinear and strain hardening; curvilinear shape changes from original straight line into curve; stress value of yield point is larger at true triaxial lateral unloading test( constant

is decreased

0) than at triaxial lateral unloading test; strain value of yield point is smaller at true triaxial lateral unloading test than at triaxial lateral unloading test. Analysis shows: Matsuoka-nakai strength criteria is suitable for sdudy yield property of Wuhan silty clay at lateral unloading.

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