摘要
黏性土的压缩变形特征是岩土工程中地基沉降计算与稳定性评估的核心问题。本文以海南地区典型黏性土为研究对象,通过室内固结试验系统分析了黏性土的压缩变形特征及其对应力路径的响应规律。研究结果表明:海南地区黏土固结变形过程可分为两个阶段,各阶段孔隙率变化幅度分别为10%以内、25%以上;两种应力路径中黏土试样均表现出了应力软化效应,且随着固结压力的增大,试样应力-应变曲线上的应变软化现象越来越明显。本文研究成果可为区域黏土应力-应变规律研究提供数据支持,同时为工程建设活动提供理论依据。
The compressive deformation characteristics of clayey soils are the core problem of foundation settlement calculation and stability assessment in geotechnical engineering.This paper takes typical clayey soil in the Hainan area as the research object,and analyzes the compressive deformation characteristics of clayey soil and its response law to the stress path through indoor consolidation test systematically.The results show that the deformation process of clay consolidation in Hainan region can be divided into two stages,and the porosity changes in each stage are within 10%,and more than 25%,respectively;And the clay specimens in the two kinds of stress paths show the stress softening effect,and with the increase of the consolidation pressure,the strain softening phenomenon on the specimen’s stress-strain curve is more and more obvious.The research results of this paper can provide data support for the study of regional clay stress-strain laws and provide a theoretical basis for engineering construction activities.
作者
黄艳
HUANG Yan(Hainan Hydrogeological and Engineering Geological Survey Institute,Haikou Hainan 571100,China)
出处
《北方建筑》
2025年第3期158-162,共5页
Northern Architecture
关键词
黏土
压缩变形
固结试验
应力-应变分析
clay
compressive deformation
consolidation test
stress-strain analysis
