摘要
对南水北调中线强膨胀岩重塑样进行了膨胀率试验,分析吸湿条件下膨胀岩膨胀变形规律。通过控制应变的广义膨胀力试验,研究了广义膨胀力的影响因素,并推导出广义膨胀力经验公式。膨胀率试验表明,邯郸强膨胀岩的膨胀率与干密度线性正相关,与初始含水率线性负相关。广义膨胀力试验表明:广义膨胀力与干密度和含水率线性相关,随干密度增加、初始含水率降低而增加,反之减小;边界约束对于广义膨胀力的影响显著,膨胀应变的略微增加,广义膨胀力大大降低。
The swelling deformation properties of expansive rock during moisture absorption are studied by means of the expansion ratio tests.Through the swelling force tests,the influential factors are analyzed,and several empirical formula are deduced.According to the expansion ratio tests,the expansive rock has a positive linear correlation with its dry density,and negative linear correlation with its initial water content.The swelling force tests indicate that the general swelling force increases with the dry density and decreases with the initial water content.Moreover,the boundary constraint has significant impact on the general swelling force,and slight increase of expansion strain will cause dramatic decrease of the general swelling force.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2011年第5期826-830,共5页
Chinese Journal of Geotechnical Engineering
基金
国家"十一五"科技支撑计划重点项目(2006BAB04A10)
关键词
膨胀率
广义膨胀力
南水北调
膨胀应变
expansion ratio
general swelling force
South-to-North Water Diversion
expansion strain
