荷载作用下黏性土坡位移场应变场分析

›› 2011, Vol. 32 ›› Issue (11): 3263-3268.

荷载作用下黏性土坡位移场应变场分析

王伟，王中华，许芝娟，陈蔚

江南大学环境与土木工程学院，江苏无锡 214122

收稿日期:2010-03-01 出版日期:2011-11-01 发布日期:2011-11-09
作者简介:王伟，女，1952年生，硕士，教授，主要从事土力学地基基础教学及软土地基处理、抗震等方面的研究工作

Analysis of displacement field and strain field of clay soil slopes under loading

WANG Wei，WANG Zhong-hua，XU Zhi-juan，CHEN Wei

Department of Environment and Civil Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China

Received:2010-03-01 Online:2011-11-01 Published:2011-11-09

摘要/Abstract

摘要： 通过室内土坡模型试验，研究了在荷载作用下黏性土坡竖向位移随深度的变化规律、土坡大主应变与最大剪应变分布、土坡的蠕变特性及裂缝作用机制。结果表明，随着荷载的逐渐增大，土坡微结构蠕变不断增加，土体的蠕变过程实质上是土体损伤过程，是土坡微结构能量耗散的过程。土坡的蠕变和损伤积累随着加荷时间延续而增大，损伤各向异性更加明显。坡顶和斜坡面处的损伤程度较大，在坡顶和斜坡面出现裂缝，坡顶的竖向位移大于侧向位移，相反坡底处侧向位移大于竖向位移。

关键词: 黏性土坡, 模型试验, 荷载, 位移场及应变场, 蠕变, 损伤

Abstract: Through laboratory model tests, the following discussions are performed based on macrostructure and microstructure: the vertical displacements varying with depth, the distribution of maximum principal strain and maximum shear strain of clay soil slopes, creep properties and crack functionary mechanism of clay soil slopes respectively under loading. The results show that, with the increase in loading, the values of creep increase microstructure of soil slopes. Creep of soil slopes can be considered as the process of damage, and process of energy dissipation of microstructure of soil slopes; and anisotropy of damage is made clear. The longer time of loading is, the larger vertical creep and damage accumulation of soil slopes is. At the top and inclined slope of soil slopes, damage becomes serious; and cracks appeared. The top of soil slopes, the values of vertical displacement are bigger than lateral displacement; on the contrary, at the bottom of soil slopes, the values of lateral displacement are larger than that of vertical displacement.

Key words: clay soil slopes, model test, loading, displacement field and strain field, creep, damage

中图分类号:

TU 432

王伟，王中华，许芝娟，陈蔚. 荷载作用下黏性土坡位移场应变场分析[J]. , 2011, 32(11): 3263-3268.

WANG Wei，WANG Zhong-hua，XU Zhi-juan，CHEN Wei. Analysis of displacement field and strain field of clay soil slopes under loading[J]. , 2011, 32(11): 3263-3268.

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