摘要
利用GEO-Experts应力相关的土水特征曲线压力板仪对镇江某工程不同深度的重塑土样进行土水特征曲线试验研究,并对试验结果的影响因素进行分析。研究发现,各深度下的土样在脱水过程中,随着基质吸力的增大,土样的体积含水率逐渐减小;吸水过程中,随之基质吸力的减小,土样的体积含水率逐渐增大;变化相同的基质吸力值,表层土体比深层土体有更大的体积含水率的变化;土样在完成脱水过程后再进行吸水试验,土样不可能完全回复到原来的状态;分析了影响试验结果的主要因素,并提出了相应的减小误差的措施,从而为本地区降雨入渗对边坡土体抗剪强度的影响以及稳定性影响研究打下基础。
In order to study the soil and water characteristic curve of remolded soil samples at different depths of soil,an experiment is done in a project in Zhenjiang using the stress-related GEO-Experts soil and water characteristic curve pressure plate apparatus.The factors influencing the test consequences are also analyzed in the experiment.According to the tests,with the increasing matrix suction,the volumetric water content of soil gradually decreases,during the dehydration process of soil samples at different depths.However,when the soil samples are in the process of absorbing water,the results are on the contrary.And with the same variable quantity of matrix suction values,the greater the soil depth,the more change the water content.What’s more,even if the soil samples absorb water again,they will not return to the original state when they have finished the dehydration process.In addition,the main influencing factors are analyzed,and several corresponding methods are given.It is helpful to the research on the influence of rainfall infiltration on the soil shear strength in local region and the slope stability.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2013年第S1期124-128,共5页
Chinese Journal of Geotechnical Engineering
基金
江苏省社会发展项目(BE2011746)
江苏省国土资源厅自然科学基金项目(2009015)
住建部研究开发项目(2011-K3-37)
关键词
非饱和土
土水特征曲线试验
基质吸力
体积含水率
影响因素
unsaturated soil
soil-water characteristic curve test
matric suction
volumetric water content
influence factor
