Study of deformation and strength characteristics of coarse grained soil under K0-consolidation condition

CHU Fu-yong; ZHU Jun-gao; WANG Ping; DU Qing; WEN Yan-feng

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Study of deformation and strength characteristics of coarse grained soil under K0-consolidation condition

更新时间：2026-06-25

- Study of deformation and strength characteristics of coarse grained soil under K0-consolidation condition
- Vol. 33, Issue 6, (2012)
- 作者机构：
  
  1. 河海大学岩土力学与堤坝工程教育部重点实验室,南京,210098
  2. 丽水学院土木工程学系,浙江,丽水,323000
  3. 中国水电顾问集团成都勘测设计研究院,成都,610072
  4. 江苏省交通规划设计院股份有限公司,南京,210098
  5. 中国水利水电科学研究院岩土工程研究所,北京,100038
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU411.5
- Online First：14 June 2012，
  
  Published：2012
- 稿件说明：
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CHU Fu-yong, ZHU Jun-gao, WANG Ping, et al. Study of deformation and strength characteristics of coarse grained soil under K0-consolidation condition[J]. 2012, 33(6).
DOI：

CHU Fu-yong, ZHU Jun-gao, WANG Ping, et al. Study of deformation and strength characteristics of coarse grained soil under K0-consolidation condition[J]. 2012, 33(6). DOI：

摘要

采用大三轴剪切仪对不同相对密度的双江口心墙坝覆盖层料，进行了K0固结及各向等压固结条件下的排水剪切试验，探讨了K0固结过程中粗粒土的变形特性。将K0固结与等压固结条件下的排水剪切试验的结果进行了对比分析。结果表明，K0固结加载阶段，平均主应力p与体应变? v之间、剪应力q剪应变? s之间的关系都可用幂函数形式表示。K0固结稳压阶段，? a-t关系呈指数关系。与等压固结试验相比，K0固结试样的排水剪强度略大。K0固结排水剪试验所得到的初始弹性模量Ei、初始泊松比vi均大于等压固结排水剪试验相同应力条件下的弹性模量、泊松比；且K0固结条件下试样的剪胀性也较为明显。

Abstract

Using large-scale shearing device

K0 consolidated-drained triaxial test and isotropically consolidated-drained triaxial test under different confining pressures are performed for three relative density overburden material of Shuangjiangkou earth dam. The behaviour of coarse-grained soil under K0-consolidation is investigated. The test results from K0 consolidated-drained tests are compared with those from isotropically consolidated-drained tests. The results show that the relationship between mean principal stress and volumetric strain and between deviatoric stress and deviatoric strain during the K0-consolidation can be fitted with power function. In the stage with steady pressure after K0-consolidation

the strain-time curve can be fitted with exponential function. The strength of K0 consolidated-drained triaxial shear test is slight greater than that of isotropically consolidated-drained test. The initial elastic modulus Ei and Poisson’s ratio vi obtained from K0 consolidated-drained triaxial test is larger than that from isotropically consolidated-drained test. The dilatancy K0-consolidated sample is more evident.

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