摘要
以筋材-砂-黏土层状体系为研究对象,采用界面剪切试验,对筋材-黏土间夹砂层后改善筋土之间相互作用效果进行试验研究.借助直接剪切试验和拉拔试验,通过改变砂层的粒度成分（粗砂和细砂）和砂层厚度（1～3cm）,分析该层状体系的具体影响.试验结果表明,尽管在筋材-黏土间夹砂层可有效提高界面的抗剪强度,但在25 ～ 75 kPa法向应力下,砂的组构（粗砂和细砂）和砂层厚度对该体系的影响都不明显.
The geosynthetic-soil interaction improved by adding sand layer between geosynthetics and clay was explored by using interface shear tests.By changing the grain size composition （coarse sand or fine sand） and the thickness of sand layer （1-3cm） in direct shear test and pull-out test,the specific influence of sand layer was analyzed.Results revealed that sand layer between geosynthetic reinforcement and clay could effectively enhance the strength of the interface,but the grain size composition and the thickness of sand layer had little influence on the shear strength of geosynthetic-sand interface under 25-75kPa normal stress.
出处
《长江科学院院报》
CSCD
北大核心
2014年第3期69-72,共4页
Journal of Changjiang River Scientific Research Institute
基金
湖北省交通科学研究计划项目(2011-700-3-42)
关键词
筋材-砂-黏土层状体系
界面剪切试验
砂层厚度
粒度成分
reinforcement-sand-clay layer system
interface shear test
thickness of sand layer
grain size composition
