岩土力学2017，Vol.38Issue(1)：150-156,7.DOI:10.16285/j.rsm.2017.01.019
颗粒粒径对格栅-土界面静、动力直剪特性的影响
Influence of soil particle size on monotonic and cyclic direct shear behaviors of geogrid-soil interface
摘要
Abstract
To investigate the influence of soil particle size on geogrid-coarse soil interface cyclic and post-cyclic shear strength behavior,a series of large scale direct shear tests,cyclic shear tests and post-cyclic direct shear tests is conducted through a large-scale direct shear device.The influence of cyclic shear history on interface shear behavior is studied according to the comparison and analysis of the results obtained from direct shear tests and post-cyclic direct shear tests.The results show that,in direct shear tests,the interface apparent cohesion and friction angle both increase with soil particle size increase.In cyclic shear tests,the shear strength tends to harden under different particle sizes;for the same amplitude of cyclic shear displacement,the smaller the particle size is,the faster the hardening rate of interface is.After subjected to cyclic shear,the ratio between residual shear stress and peak shear stress of interface decreases;and the peak apparent shear stress increases insignificantly.关键词
筋-土界面/颗粒粒径/循环剪切/应力历史Key words
geogrid-soil interface/particle size/cyclic shear/stress history分类
建筑与水利引用本文复制引用
刘飞禹,王攀,王军,蔡袁强..颗粒粒径对格栅-土界面静、动力直剪特性的影响[J].岩土力学,2017,38(1):150-156,7.基金项目
国家自然科学基金资助项目(No.51478255,No.51678352,No.51622810) （No.51478255,No.51678352,No.51622810）
上海市自然科学基金资助项目(No.14ZR1416100).This work was supported by the National Natural Science Foundation of China (51478255,51678352,51622810) and the Natural Science Foundation of Shanghai(14ZR1416100). （No.14ZR1416100）
