Experimental research on dynamic Poisson’s ratio of undisturbed marine soil

PAN Hua; CHEN Guo-xing; SUN Tian

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Experimental research on dynamic Poisson’s ratio of undisturbed marine soil

更新时间：2026-06-25

- Experimental research on dynamic Poisson’s ratio of undisturbed marine soil
- Vol. 32, Issue S1, (2011)
- 作者机构：
  
  南京工业大学岩土工程研究所,南京,210009
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU411
- Online First：16 May 2011，
  
  Published：2011
- 稿件说明：
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PAN Hua, CHEN Guo-xing, SUN Tian. Experimental research on dynamic Poisson’s ratio of undisturbed marine soil[J]. 2011, 32(S1).
DOI：

PAN Hua, CHEN Guo-xing, SUN Tian. Experimental research on dynamic Poisson’s ratio of undisturbed marine soil[J]. 2011, 32(S1). DOI：

摘要

利用空心圆柱扭剪（HCA）仪，针对原状海洋粉质黏土，通过循环三轴及循环扭剪试验，得出相应的杨氏模量、剪切模量和动泊松比，探讨了有效固结围压、固结应力比对动泊松比的影响。试验结果表明：土体的动泊松比随着广义剪应变的增大而增大；有效固结围压、固结应力比均对动泊松比有显著的影响，动泊松比随着有效固结围压、固结应力的增大而逐渐减少；且随着广义剪应变的增大，两者对动泊松比的影响减小，当广义剪应变增大到1.8×10-2左右，试验终止，此时土体动泊松比约为0.48。试验中未出现动泊松比大于0.5的现象，说明土体未出现剪胀现象，试验所采用的粉质黏土在循环荷载作用下具有较好的稳定性

Abstract

Cyclic torsional shear and cyclic triaxial tests are performed on undisturbed marine silty clay by the hollow cylinder apparatus; and the shear modulus and Young’s modulus are obtained respectively. Meanwhile

the effect of effective confining pressure and stress ratio on dynamic Poisson’s ratio is investigated on the basis. It is found that the dynamic Poisson’s ratio increases with generalized shear strain

but decreases with increasing effective confining pressure and stress ratio. The effects of effective confining pressure and stress ratio on dynamic Poisson’s ratio is weakened as the generalized shear strain increasing. The dynamic Poisson’s ratio is about 0.48 when the Poisson’s ratio increased to 1.8×10-2 or so

and the tests are terminated. There are no shear dilatation during all tests because the Poisson’s ratios are smaller than 0.5. It is indicated that the undisturbed marine silty clay tested in the paper has a good stability under cyclic loadings

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