Study of characteristics of pore water pressure and strength of overconsolidated saturated marine clay under bidirectional cyclic loadings

LIU Gong-xun; LUAN Mao-tian

English Version Journal Login

您当前的位置：

首页 >

文章列表页 >

Study of characteristics of pore water pressure and strength of overconsolidated saturated marine clay under bidirectional cyclic loadings

更新时间：2026-06-25

- Study of characteristics of pore water pressure and strength of overconsolidated saturated marine clay under bidirectional cyclic loadings
- Vol. 32, Issue S2, (2011)
- 作者机构：
  
  1. 中交上海航道勘察设计研究院有限公司中交疏浚技术重点实验室,上海,200120
  2. 大连理工大学土木工程学院岩土工程研究所,辽宁,大连,116024
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU411.6
- Online First：26 August 2011，
  
  Published：2011
- 稿件说明：
移动端阅览
LIU Gong-xun, LUAN Mao-tian. Study of characteristics of pore water pressure and strength of overconsolidated saturated marine clay under bidirectional cyclic loadings[J]. 2011, 32(S2).
DOI：

LIU Gong-xun, LUAN Mao-tian. Study of characteristics of pore water pressure and strength of overconsolidated saturated marine clay under bidirectional cyclic loadings[J]. 2011, 32(S2). DOI：

摘要

针对长江口地区的重塑饱和海洋黏土，进行了一系列均等固结条件下的应力控制式轴向-扭转双向耦合循环剪切试验，着重探讨了循环荷载分量比R与超固结比OCR对孔压与动强度特性的影响。试验结果表明，随着R的减小，波动孔压幅值逐渐降低，而残余孔压先降低后升高，R = 1时残余孔压最小。在循环耦合剪切作用过程中，对应相同循环次数，随着OCR的增大，累积孔压变小，而波动孔压幅值却在增大。对应相同循环次数比N/Nf，随着OCR增大，残余孔隙水压力比ur / urmax减小。经归一化处理后ur / urmax-N/Nf关系曲线对于正常固结与超固结饱和黏土可分别用不同的表达式来表达。随着R的降低，破坏循环次数先增大后减小，R = 1时最大。随着OCR的增大，饱和黏土的强度变化减小

Abstract

Through a series of stress-controlled coupling vertical and torsional shear tests under isotropic consolidation stress conditions on the remoulded saturated marine clay in the Yangtze River estuary

the effects of the ratio of two stress components (R) and the over consolidation ratio (OCR) on the characteristics of pore water pressure and dynamic strength were examined. It is found that with a decrease in R

the amplitude of fluctuated pore water pressure decreases all along

while the residual pore water pressure decreases at first and then increases

and it reaches the lowest at R = 1. At the same cycle number

the residual pore water pressure decreases

while the amplitude of fluctuated pore water pressure increases with the increasing of OCR. At the same ratio of number of cycles (N/Nf)

the ratio of residual pore water pressure (ur / urmax) decreases with the increasing of OCR. The relationship curves of ur / urmax-N/Nf for the normally consolidated and overconsolidated saturated clays can be expressed by different expressions. The cycle number at failure increases at first and then decreases with a decrease in R; and it reaches the most at R = 1. The change of the dynamic strength decreases with an increase in OCR.

关键词

Keywords

references

Views

1789

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Dynamic properties variation of tire shred-soil mixtures

Influence of long-term partial drainage of shield tunnel on tunnel deformation and surface settlement

Stability of high relative density silt under cyclic principal stress axis rotation

Dynamic strength and pore pressure property of marine deposit soft clay

Nonlinear mechanical response of surrounding rock in compressed air energy storage cavern based on Hoek-Brown criterion

Related Author

LI Li-hua

XIAO Heng-lin

TANG Hui-ming

HU Qi-zhi

SUN Miao-jun

SUN Long

WU Bo

SUN De-an

Related Institution

Engineering Faculty, China University of Geosciences

Key Laboratory of Safety for Geotechnical and Structural Engineering of Hubei Province, Wuhan University

School of Civil Engineering and Architecture, Hubei University of Technology

Shanghai Construction Group Co., Ltd.

Department of Civil Engineering, Shanghai University

AI问答

⁰