土工基础

›› 2016, Vol. 30 ›› Issue (3): 387-390.

• 工程实录 • 上一篇    下一篇

不同应力路径下饱和软粘土静力特性试验研究

沈 娟1，曾芳金1，曹树刚1，董爱群2   

  1. （1.江西理工大学 建筑与测绘工程学院，江西赣州 341000； 2.江苏中核华兴建筑装饰有限公司，南京 210019）
  • 收稿日期:2015-06-17 修回日期:2015-06-27 出版日期:2016-06-20 发布日期:2016-06-21
  • 作者简介:沈〓娟（1990-），女，硕士研究生，研究方向为土动力学。 

Stress Path Tests on Saturated Wenzhou Soft Clays

SHEN Juan1, ZENG Fangjin1, CAO Shugang1, DONG Aiqun2   

  1. (1.School of Architectural and Surveying & Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou 341000;
    2.Huaxing Building Decoration Co,. Ltd, China Nuclear Industry, Nanjing 210019)
  • Received:2015-06-17 Revised:2015-06-27 Online:2016-06-20 Published:2016-06-21

摘要： 采用英国GDS变围压动三轴系统对温州饱和软粘土分别进行了应力路径斜率 η =1/3时不同初始有效固结围压的静力试验和不同应力路径的静力试验，研究了不同条件下温州饱和软粘土的强度特性。试验结果表明，不同初始有效固结围压和不同应力路径的温州饱和软粘土均呈应变硬化规律，且呈非线性；随着初始有效固结围压的增加，土体的强度在增加；应力路径斜率 η =1/3 时不同初始有效固结围压下，土体所呈现的变化曲线具有相似性。

关键词: 软粘土, 应力路径, 静力特性, GDS动三轴, 有效固结围压

Abstract: The Stress path tests on saturated Wenzhou soft clays were conducted on the GDS dynamic triaxial testing system with variable confining pressures. Tests are performed with the slope of the stress path is set to be 1/3 with different initial effective confining stress and with various stress paths. The test results indicate that, the nonlinear strain hardening phenomena can be observed in different initial effective confining pressures and different stress paths. With the increase of initial effective consolidation pressure, the strength of the soft clay increases. Under a stress path slope of 1/3, all soil hardening curves are similar.

Key words: Soft Clays, Stress Path, Strength Characterization, Dynamic Triaxial Testing Equipment, Effective Consolidation Pressure