The pore pressure model and undrained shear strength of soft clay under cyclic loading

NIE Qing-ke; BAI Bing; HU Jian-min; SHANG Wei-dong

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The pore pressure model and undrained shear strength of soft clay under cyclic loading

更新时间：2026-06-25

- The pore pressure model and undrained shear strength of soft clay under cyclic loading
- Vol. 28, Issue S1, (2007)
- 作者机构：
  
  1. 河北建设勘察研究院有限公司,石家庄,050031
  2. 北京交通大学土木建筑工程学院,北京,100044
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU473
- Online First：28 March 2014，
  
  Published：2007
- 稿件说明：
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NIE Qing-ke, BAI Bing, HU Jian-min, et al. The pore pressure model and undrained shear strength of soft clay under cyclic loading[J]. 2007, 28(S1).
DOI：

NIE Qing-ke, BAI Bing, HU Jian-min, et al. The pore pressure model and undrained shear strength of soft clay under cyclic loading[J]. 2007, 28(S1). DOI：

摘要

通过循环三轴剪切试验，研究原状软土的变形和孔压发展规律。建议了一个循环荷载作用下孔隙水压力的发展模式。研究了不排水循环荷载作用下软土的动强度以及作用后饱和软土静强度的衰减特征，讨论了周围固结压力和荷载作用频率对动强度的影响。研究表明，在某一轴向应变条件下，循环次数随循环剪应力比的增加而迅速减小；随循环剪切应力比的增大，饱和软土的静强度有一定衰减。

Abstract

The developments of pore pressure and axial deformation of undisturbed samples are studied by cyclic axial shear tests. A model for predicting the evolution of pore pressure under cyclic shear loading is proposed. The dynamic shear strength under undrained cyclic shear conditions is determined

and the degradation characteristics of undrained monotonic shear strength after cyclic loading are also analyzed. The effects of confining pressure and the frequency of cyclic loading on dynamic shear strength are studied. Studies show that

under a definite axial strain

the cyclic numbers decreases notably with the increase in cyclic stress ratio. Besides

the static undrained shear strength is degraded with the increase in cyclic stress ratio.

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