Bearing structure of unsaturated soil and generalized structural properties

DUAN Xiao-meng; ZENG Li-feng

doi:10.16285/j.rsm.2016.3004

English Version Journal Login

您当前的位置：

首页 >

文章列表页 >

Bearing structure of unsaturated soil and generalized structural properties

更新时间：2026-06-25

- Bearing structure of unsaturated soil and generalized structural properties
- Vol. 39, Issue 9, Pages: 3103-3112(2018)
- 作者机构：
  
  1. 大连理工大学大连工业装备结构分析国家重点实验室,辽宁,大连,116023
  2. 大连理工大学工程力学系,辽宁,大连,116023
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2016.3004
  CLC： TU411
- Online First：08 October 2018，
  
  Published：2018
- 稿件说明：
移动端阅览
DUAN Xiao-meng, ZENG Li-feng. Bearing structure of unsaturated soil and generalized structural properties[J]. 2018, 39(9): 3103-3112.
DOI：

DUAN Xiao-meng, ZENG Li-feng. Bearing structure of unsaturated soil and generalized structural properties[J]. 2018, 39(9): 3103-3112. DOI： 10.16285/j.rsm.2016.3004.

摘要

鉴于非饱和土的复杂性，经典的3相模型过于简单，不利于分析相间相互作用及正确定义土中应力。将非饱和土视为一种特殊结构，并细分为6相，定义了其承载结构——广义土结构，进而分析了饱和土与非饱和土的主要差异：承载结构和孔隙流体均不同。基于承载结构的共性，提出了一套定性描述土体结构特点的指标——广义结构性，其普遍适用于描述不同土的承载结构特点。结合实际现象，分析了各指标的合理性，指出湿陷的本质是广义土结构的弱化。此后，分析了两种代表性相间相互作用，揭示了中性应力的物理意义，并合理定义了吸应力，最终明确了土骨架总应力就是“有效应力”。

Abstract

Because of the complexity of unsaturated soil

traditional three-phase model for unsaturated soil is oversimplified

which is unfit for interphase analysis and determination of stresses in soil. Considering a special structure in unsaturated soil

in this work

soil water system is divided into six phases and its bearing structure

named generalized soil structure

is defined. Then the differences between saturated and unsaturated soils are concluded: the bearing structures and pore liquids are different. Based on the similarity of bearing structures

a set of variables to depict the structural properties of soils is defined as generalized structural properties to describe the properties of the bearing structures of different soils. The rationality of some variables is analyzed by explaining some practical phenomena

e.g. the essence of collapse phenomenon is the weakening of the bearing structure of soil. Two representative interphase interactions are discussed and the physical significance of neutral stress is revealed

and the suction stress is redefined. Finally

it proves that the total skeleton stress in the grain is the “effective stress” for unsaturated soil.

关键词

Keywords

references

Views

196

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Origin and development of the concept of effective stress for soils

Rankine's earth pressure analysis of unsaturated soil under condition of rainfall infiltration

Skeleton and force chain network in static granular material

Principle of generalized effective stress for unsaturated soils

Study on elastoplastic model of unsaturated soil

Related Author

ZENG Li-feng

SHAO Long-tan

GUO Xiao-xia

WANG Ding-jian

TONG Long-yun

QIU Yue-feng

SUN Qi-cheng

XIN Hai-li

Related Institution

State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology

Faculty of Engineering, China University of Geosciences

Chengdu Hydrogeological and Engineering Geological Team, Sichuan Bureau of Geology and Mineral Resources Exploration

State Key Laboratory of Hydroscience and Engineering, Tsinghua University

Institute of Geotechnical Engineering, Beijing Jiaotong University

AI问答

⁰