长江科学院院报 ›› 2014, Vol. 31 ›› Issue (3): 69-72.DOI: 10.3969/j.issn.1001-5485.2014.03.010

• 试验研究 • 上一篇    下一篇

筋材-砂-黏土层状体系接触面剪切特性试验研究

刘 枫a, b, 徐 超a, b, 宋世彤a, b   

  1. 同济大学 a.岩土及地下工程教育部重点实验室;b.地下建筑与工程系, 上海 200092
  • 收稿日期:2013-11-15 修回日期:2014-03-07 出版日期:2014-03-07 发布日期:2014-03-07
  • 作者简介:刘 枫(1989-), 男, 江苏泰州人, 硕士研究生, 主要从事地基处理与土工合成材料方面的研究, (电话)13761186705(电子信箱)liufeng0023@gmail.com。
  • 基金资助:
    :湖北省交通科学研究计划项目(2011-700-3-42)

Interface Shear Characteristics of Reinforcement-Sand-Clay System

LIU Feng1, 2, XU Chao1, 2, SONG Shi-tong1, 2   

  1. 1.Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China;2. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China
  • Received:2013-11-15 Revised:2014-03-07 Online:2014-03-07 Published:2014-03-07

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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(1～3 cm), 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。

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

Abstract: 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.

Key words: reinforcement-sand-clay layer system, interface shear test, thickness of sand layer, grain size composition

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