Experimental study of effect of wetting-drying path on small-strain shear modulus of silt

XU Jie; ZHOU Chao

doi:10.16285/j.rsm.2015.S1.065

English Version Journal Login

您当前的位置：

首页 >

文章列表页 >

Experimental study of effect of wetting-drying path on small-strain shear modulus of silt

更新时间：2026-06-25

- Experimental study of effect of wetting-drying path on small-strain shear modulus of silt
- Vol. 36, Issue S1, Pages: 377-381(2015)
- 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,江苏,南京,210098
  2. 河海大学岩土工程研究所,江苏,南京,210098
  3. 香港科技大学土木与环境工程学系,香港
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2015.S1.065
  CLC： TU443
- Online First：14 June 2018，
  
  Published：2015
- 稿件说明：
移动端阅览
XU Jie, ZHOU Chao. Experimental study of effect of wetting-drying path on small-strain shear modulus of silt[J]. 2015, 36(S1): 377-381.
DOI：

XU Jie, ZHOU Chao. Experimental study of effect of wetting-drying path on small-strain shear modulus of silt[J]. 2015, 36(S1): 377-381. DOI： 10.16285/j.rsm.2015.S1.065.

摘要

天然土尤其是地表浅层土常处于非饱和状态，其小应变剪切模量是预测地基变形及土工结构物动力反应的一个重要参数。通过对非饱和压实粉土三轴样进行弯曲元试验，研究了吸力和干湿路径对其小应变剪切模量的影响。试验结果表明，非饱和压实粉土样的小应变剪切模量各向异性忽略不计；小应变剪切模量G0(vh)、G0(hh)和G0(hv)均随吸力增大而非线性增大；同一吸力下不同干湿路径上的土样，饱和度不同，其小应变剪切模量随饱和度升高而减小，主要原因是土的平均骨架应力和土中毛细水的作用。根据试验结果对非饱和土小应变剪切模量的半经验公式进行了改进，同时考虑了吸力与饱和度的作用。

Abstract

Natural soils are usually under unsaturated state

especially soils at shallow depths below ground. The small-strain shear modulus of unsaturated soil is an important parameter for predicting ground deformation and dynamic responses of earth structures. Bender element tests were carried out on unsaturated compacted silt triaxial specimens to investigate the effects of suction and wetting-drying on small-strain shear modulus. Test results show that the small-strain shear modulus anisotropy of unsaturated compacted silt is negligible. The small-strain shear moduli G0(vh)

G0(hh) and G0(hv) all increase with suction nonlinearly. For specimens under same suction but along different wetting-drying paths

their saturation degrees are different. Small-strain shear moduli decrease with increase of saturation degree. These observations are mainly due to the changes of average skeleton stress and meniscus water effect. Semi-empirical equation for describing small-strain shear modulus of unsaturated soil is modified based on test results; the effects of suction and saturation degree are both considered.

关键词

Keywords

references

Views

228

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Three-dimensional method for constitutive relationship of overconsolidation unsaturated soil

Simplified computation of two-dimensional consolidation of unsaturated soils

Effect of saturation degree on mechanical behaviours of unsaturated soils

Research on effects of suction,water content and dry density on shear strength of remolded unsaturated soils

Analysis of diverse suctions in compact accumulation model composed of ball-shaped particles

Related Author

NIU Lei

YAO Yang-ping

CUI Wen-jie

WAN Zheng

CAO Xue-shan

YIN Zong-ze

SUN De-an

SHEN Chun-ni

Related Institution

School of Transportation Science and Engineering, Beihang University

College of Traffic, Hohai University

Institute of Geotechnical Engineering, Hohai University

Department of Civil Engineering, Shanghai University

School of Civil Engineering and Architecture, Chongqing University of Science and Technology

AI问答

⁰