摘要
对双向土工格栅加筋膨胀土进行一系列不同压实密度下的无侧限压缩和固结不排水剪试验,研究了干密度对其强度与变形特性的影响。无侧限压缩试验表明,当小于最优含水率2%,干密度较大时,加筋对应力-应变特征的影响较大,加筋后峰值与残余强度及其分别对应应变提高的比例较大;干密度对加筋效果的影响趋势还与含水率有关。固结不排水剪试验表明,加筋后膨胀土峰值强度与硬化程度均得以提高,干密度对强度与变形特性影响程度也随含水率而异。
The expansive soil samples reinforced with biaxial geogrid are adopted to carry out a series of tests at different dry density. Effects of reinforcement on the strength and deformation characteristics of expansive soil at different dry density are analyzed. Unconfined compression tests indicate, when higher dry density and the water content less 2% than the optimum quantity, reinforcement has great effects on the stress-strain features, and increment of the peak and residual strength, and the corresponding strain are great after reinforced. Whereas, reinforcement has great effects on the stress-straln features when lower dry density and the water content more 2 % than the optimum quantity. The consolidated undrained triaxial tests indicate, the peak strength and hardening degree of expansive soil are improved after reinforced, and effect of dry density on strength and deformation characteristics is also different upon water content.
出处
《水文地质工程地质》
CAS
CSCD
北大核心
2009年第5期40-43,共4页
Hydrogeology & Engineering Geology
基金
国家十一五科技支撑计划重大项目(2006BAB04A10)
关键词
干密度
双向土工格栅
加筋膨胀土
无侧限压缩试验
固结不排水剪试验
dry density
biaxial geogrid
reinforced expansive soil
unconfined compression test
consolidated undrained triaxial test
