Microstructural characteristics of volumetric deformation of clay under different compression stresses

CHEN Bao; ZHU Rong; CHANG Fang-zhen

English Version Journal Login

您当前的位置：

首页 >

文章列表页 >

Microstructural characteristics of volumetric deformation of clay under different compression stresses

更新时间：2026-06-25

- Microstructural characteristics of volumetric deformation of clay under different compression stresses
- Vol. 32, Issue S1, (2011)
- 作者机构：
  
  1. 同济大学岩土及地下工程教育部重点实验室,上海,200092
  2. 上海市宝山区建设和交通委员会,上海,201900
  3. 中交上海港湾工程设计研究院有限公司,上海,200032
- 作者简介：
- 基金信息：
- DOI：
  CLC： TD853.34
- Online First：16 May 2011，
  
  Published：2011
- 稿件说明：
移动端阅览
CHEN Bao, ZHU Rong, CHANG Fang-zhen. Microstructural characteristics of volumetric deformation of clay under different compression stresses[J]. 2011, 32(S1).
DOI：

CHEN Bao, ZHU Rong, CHANG Fang-zhen. Microstructural characteristics of volumetric deformation of clay under different compression stresses[J]. 2011, 32(S1). DOI：

摘要

为了研究黏土体积变形的微观结构变化特征，选取上海第4层淤泥质黏土为研究对象，分别采用各向等压和K0压缩两种方法制备体积变化率相同的土样，经冷冻真空干燥后对土样进行压汞试验并测定土中孔隙大小分布状况。压汞试验结果表明：试验黏土中孔隙可分为大孔隙、中孔隙、小孔隙和微孔隙，小孔隙占据土中孔隙的大部分空间，且其变化能够反映微观结构的主要特性；在各向等压应力状态下，随着压应力增高、体积压缩量增大，黏土颗粒发生空间平移使颗粒间变得更为紧密，孔隙分布曲线变化以孔隙波峰往孔隙变小方向偏移为主要特征，孔隙尺寸变小而孔隙形态基本不变；在K0压缩应力状态下，随着压应力增高，黏土颗粒发生旋转使孔隙变得扁平，表现为孔隙波峰位置基本不发生偏移，而以峰值降低为主要特征，孔隙结构形态明显改变

Abstract

With the soft clay samples of the 4th soil layer in Shanghai prepared by isotropic compression and K0 compression respectively

some mercury intrusion porosimetry (MIP) tests were carried out to investigate the microstructural characteristics of the volumetric deformation of clay under different compression stresses. By analyzing and comparing the pore size distribution curves (PSDC) obtained from MIP tests

some conclusions are drawn as follows. The pores in tested clay can be divided into macropore

mesopore

fine pore and micropore; where the fine pores account most on the volumetric deformation of clay; under the isotropic compression state

the soil particles move and get closer to each other with the development of compression

which make the main peak according to fine pores moves towards left (become smaller) with the pore shape unchanged in PSDC. While under the K0 compression state

the soil particles rotate and the pores become flat

which presents that the peak value of fine pores in PSDC drops down evidently.

关键词

Keywords

references

Views

1624

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

A damage constitutive model for sand based on the analysis of the sliding of skeleton grains

Stability of plate anchors in NC clay

Damage Evolution Analysis of Frozen Aeolian Soil in the West of Liaoning Province Under Dynamic Loading

Research on engineering characteristic of soil in alluvial plain by Yellow River

Study on variation of microstructure and mechanical properties of water-weakening slates

Related Author

WANG Jing-tao

ZHANG Guang-yong

XU Hui

KONG Xian-jing

LIU Jun

YU Long

ZHANG Shu-guang

SUN Yang

Related Institution

School of Civil Engineering & Mechanics, Huazhong University of Science and Technology

State Key Laboratory of Coastal & Offshore Engineering, Dalian University of Technology

Liaoning Technical University

Shandong Expressway Corporation

Shandong University

AI问答

⁰