钢塑凸榫土工格栅及其筋土界面特性研究

王睿; 王双; 彭大雷

doi:10.13544/j.cnki.jeg.2016.03.008

钢塑凸榫土工格栅及其筋土界面特性研究

doi: 10.13544/j.cnki.jeg.2016.03.008

王睿^1,2,
王双²,
彭大雷³

1.
成都理工大学环境与土木工程学院成都 610059;
2.
中国民航机场建设集团公司西南分公司成都 610212;
3.
喀斯特环境与地质灾害防治教育部重点实验室贵州大学贵阳 550003

基金项目:

中国民航机场建设集团公司科技及基础研发项目(项目编号:jsrdkyn201011)资助

详细信息

作者简介:
王睿(1977-),男,博士生,高级工程师,主要从事机场岩土工程咨询设计工作.Email:wrbeyond@163.com

中图分类号: TU473
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出版历程
- 收稿日期: 2015-01-05
- 修回日期: 2015-04-09
- 刊出日期: 2016-06-25

STEEL-PLASTIC TENON GEOGRID AND ITS INTERACTION CHARACTERISTICS WITH BACKFILLS

1.
College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu 610059;
2.
Southwest Branch of China Airport Construction Group Corporation of CAAC, Chengdu 610212;
3.
Key Laboratory of Karst Environment and Geohazard Prevention, Ministry of Education, Guizhou University, Guiyang 550003

摘要

摘要: 本文在钢塑土工格栅之上辅以凸榫设计,研制出一种新型的土工格栅结构类型,即钢塑凸榫土工格栅。将钢塑土工格栅和钢塑凸榫土工格栅分别与多种不同类型的典型填料进行室内直剪试验和室内拉拔试验,证明了凸榫的设置有利于筋土界面性能的改善。通过对凸榫土工格栅的破坏模型进行理论分析,推导了凸榫格栅与岩土体间界面抗剪强度的理论公式。通过与室内试验结果对比分析表明,该理论公式求得的内摩擦角值基本符合实际,而黏聚力则不符合实际,凸榫对黏聚力的贡献值建议取2~7kPa。
- 钢塑土工格栅 /
- 凸榫 /
- 直剪试验 /
- 拉拔试验 /
- 筋土界面强度
Abstract: In this paper, a new type of geogrid structure named steel-plastic composite tenon geogrid is designed by attaching tenon to steel-plastic geogrid. Laboratory direct shear tests and pull-out tests between various typical backfills and geogrid and tenon geogrid are carried out respectively. The test results demonstrate that the tenon is useful to improve the mechanical characteristics between geogrid and backfills. Damage model between tenon geogrid and soils is analyzed. A simple theoretical formula describing the interaction shear strength is deduced. Comparisons between laboratory test results and theoretical results indicate that the friction angle based on the formula calculations coincides with that of the test results, although the cohesion is far different from the that of the test results. Based on the test results, the value of tenons contribution to cohesion is recommended to be 2 kPa to 7 kPa.
- Steel-plastic geogrid /
- Tenon Direct shear test /
- Pull-out test /
- Interaction strength between geogrid and soils /

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