Coefficient of earth pressure at rest and undrained shear strength of overconsolidated soft clays

JIU Yong-zhi; HUANG Mao-song

doi:10.16285/j.rsm.2017.04.004

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Coefficient of earth pressure at rest and undrained shear strength of overconsolidated soft clays

更新时间：2026-06-25

- Coefficient of earth pressure at rest and undrained shear strength of overconsolidated soft clays
- Vol. 38, Issue 4, Pages: 951-957(2017)
- 作者机构：
  
  1. 同济大学地下建筑与工程系
  2. 中原工学院建筑工程学院
  3. 同济大学岩土及地下工程教育部重点实验室
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2017.04.004
  CLC： TU442
- Published：2017
- 稿件说明：
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[1]纠永志,黄茂松.超固结软黏土的静止土压力系数与不排水抗剪强度[J].岩土力学,2017,38(04):951-957+964.

JIU Yong-zhi, HUANG Mao-song. Coefficient of earth pressure at rest and undrained shear strength of overconsolidated soft clays[J]. 2017, 38(4): 951-957.
[1]纠永志,黄茂松.超固结软黏土的静止土压力系数与不排水抗剪强度[J].岩土力学,2017,38(04):951-957+964. DOI： 10.16285/j.rsm.2017.04.004.

JIU Yong-zhi, HUANG Mao-song. Coefficient of earth pressure at rest and undrained shear strength of overconsolidated soft clays[J]. 2017, 38(4): 951-957. DOI： 10.16285/j.rsm.2017.04.004.

摘要

通过应力路径三轴试验对不同超固结比下饱和软黏土的K

系数及K

超固结软土的抗剪强度进行了研究

提出了超固结软土的K

系数计算公式

基于各向异性屈服准则推导了K

超固结软黏土的不排水抗剪强度

并与试验结果对比证明了计算公式的有效性。分析表明

常用的Mayne-Kulhawy K

系数计算公式过高地估算较大超固结比OCR时的K

系数

同时所提出的K

超固结软黏土不排水抗剪强度公式通过考虑土体K

系数随OCR的变化

避免了假设以有效上覆压力表示的回弹线斜率为常数所存在的问题。通过与试验结果对比表明

该公式能较好地预测K

超固结土体的不排水抗剪强度。

Abstract

The stress path triaxial tests were conducted to examine the coefficient of K

of different stress paths and the undrained shear stress-strain under K

-conlidation.Formula of K

coefficient was proposed for K

overconsolidated soil.Based on anisotropic yield criteria

the undrained shear strength equations of K

overconsolidated soil were developed.The validity of proposed procedure was verified by comparing calculated results and experimental results.The results indicated that the formula proposed by Mayne and Kulhawy overestimated the coefficient when the OCR was

large.The undrained shear strength equations of K

overconsolidated soil avoided errors which were caused by assuming a constant slope of rebound denoted by the effective overburden pressure

by considering the variation of K

coefficient with OCR.Experimental results indicated that the proposed formula has the advantage to predict the undrained shear strength of K

overconsolidated soil.

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