Study of dilatancy behaviors of coarse-grained soils in large-scale triaxial test

CHU Fu-yong; ZHU Jun-gao; YIN Jian-hua

English Version Journal Login

您当前的位置：

首页 >

文章列表页 >

Study of dilatancy behaviors of coarse-grained soils in large-scale triaxial test

更新时间：2026-06-25

- Study of dilatancy behaviors of coarse-grained soils in large-scale triaxial test
- Vol. 34, Issue 8, (2013)
- 作者机构：
  
  1. 丽水学院土木工程学系,浙江,丽水,323000
  2. 重庆交通大学水利水运工程教育部重点实验室,重庆,400074
  3. 河海大学岩土力学与堤坝工程教育部重点实验室,南京,210098
  4. 香港理工大学土木工程系，香港九龙红磡
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU411.5
- Online First：13 August 2013，
  
  Published：2013
- 稿件说明：
移动端阅览
CHU Fu-yong, ZHU Jun-gao, YIN Jian-hua. Study of dilatancy behaviors of coarse-grained soils in large-scale triaxial test[J]. 2013, 34(8).
DOI：

CHU Fu-yong, ZHU Jun-gao, YIN Jian-hua. Study of dilatancy behaviors of coarse-grained soils in large-scale triaxial test[J]. 2013, 34(8). DOI：

摘要

采用大三轴剪切仪对3种不同相对密度的双江口心墙坝覆盖层料进行固结排水剪切试验，重点研究粗粒土的剪胀特性，分析粗粒土的剪胀性与围压、相对密度之间的关系，并检验修正剑桥模型的剪胀方程、Rowe剪胀方程对粗粒土的适用性。结果表明，粗粒土在低围压下表现出明显的剪胀趋势，随着围压的增加，逐渐由剪胀向剪缩过渡；随着密度的增大，粗粒土的剪胀性明显增强；相变应力比是粗粒土剪胀强弱的一个重要影响因素，其随密度的增加而增加，随围压的增大则呈线性减小趋势；粗粒土的剪胀性与相对密度、围压关系密切，根据试验数据得出最大剪胀率与相对密度、围压之间的关系式；修正剑桥模型的剪胀方程不能反映粗粒土的剪胀性；Rowe剪胀方程在一定程度上能反映粗粒土的剪胀性，但高围压下在压缩阶段低估了其压缩性，而在剪胀阶段则高估了其剪胀性。

Abstract

Using large-scale shearing device

isotropic consolidated-drained triaxial tests under different confining pressures are performed for three relative densities overburden material of Shuangjiangkou earth dam. The dilatancy of coarse-grained materials is investigated; the relationship among dilatancy

relative density and confining pressure are discussed; and applicability of dilatancy equation of modified Cam-clay model and Rowe dilatancy equation for coarse-grained soils are tested. It is found that the confining pressure and initial density influence dilatancy evidently; that is

under low confining pressure coarse-grained soils are characterized by volumetric dilatancy; and with the increasing of confining pressure they exhibit volumetric compression. The increasing of density results in the increase of dilatancy. Phase transformation stress ratio is an important factor affecting dilatancy

which exhibit increasing with the increase of density and linear decrease with the increase of confining pressure. According to the test data

a relationship formula among dilatancy ratio and relative density and confining pressure is obtained. Dilatancy equation of modified Cam-clay model cannot reflect the dilatancy; and Rowe dilatancy equation can reflect the dilatancy of the coarse-grained materials; but when confining pressure is higher it underestimate the compression during compression stage and overestimate the dilatancy during shearing stage.

关键词

Keywords

references

Views

2131

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

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

Shear strength and volume change behavior of clay-rich soil at high suctions

Dilatancy of coarse-grained soil in large-scale triaxial tests study

A cyclic constitutive model of saturated dense sands considering fabric change effects

Experimental study of compaction characteristics and fractal feature in crushing of coarse-grained soils

Related Author

CHU Fu-yong

ZHU Jun-gao

WANG Ping

DU Qing

WEN Yan-feng

XU Xiao

ZHAO Cheng-gang

JIANG Jing-shan

Related Institution

Hydro-China Chengdu Design and Research Institute

Jiangsu Provincial Communications Planning and Design Institute

Department of Geotechnical Engineering, China Institute of Water Resources and Hydropower Research

College of Civil Engineering and Architecture, Guilin University of Technology

Key Laboratory of Urban Underground Engineering of Ministry of Education, Beijing Jiaotong University

AI问答

⁰