路基工程Issue(5)：95-100,6.DOI:10.13379/j.issn.1003-8825.202405083
含水率和围压对粉质黏土力学性能的影响研究
Study on the Influence of Moisture Content and Confining Pressure on the Mechanical Properties of Silty Clay
杨文杰 1唐泽龙 1潘元贵 2郑余朝 2章慧健 2邵世友 2卢锋 3杨楚涵3
作者信息
- 1. 中铁八局集团第七工程有限公司,成都 610300
- 2. 西南交通大学土木工程学院,成都 611752||西南交通大学交通隧道工程教育部重点实验室,成都 610031
- 3. 西华大学应急管理学院,成都 610039
- 折叠
摘要
Abstract
Taking the silty clay from a certain region as the research object,a triaxial compression test was carried out on the soil samples using the TSZ fully automatic triaxial loading system to investigate the mechanical properties of the silty clay under different water contents and different enclosing pressures.The result shows that,the strength of silty clay at 15.0％and 16.1％water content is 64.4％and 42.6％of that at 8.2％natural water content,respectively.The sensitivity of cohesion to water content is much higher than that of internal friction angle.For every 100 kPa increase in confining pressure,the strength of silty clay increases by about 190 kPa,and the influence of confining pressure on the maximum principal stress and maximum strain values at each stage are gradually increasing.The weakening of capillary water,the enhancement of lubrication effect,the loosening of particle arrangement and the alteration of microstructure are the main influencing mechanisms of water content,while the increase of contact stress between particles,the enhancement of inter-particle friction and adhesion,and the compression and closure of internal pores,which increase the density of the soil body,are the main influencing mechanisms of the confining pressure.关键词
粉质黏土/三轴试验/含水率/黏聚力/围压/力学特征Key words
silty clay/triaxial test/moisture content/cohesion/confining pressure/mechanical properties分类
建筑与水利引用本文复制引用
杨文杰,唐泽龙,潘元贵,郑余朝,章慧健,邵世友,卢锋,杨楚涵..含水率和围压对粉质黏土力学性能的影响研究[J].路基工程,2025,(5):95-100,6.
