不同剪切速率下格栅–土界面循环剪切及其后直剪特性

doi:10.13722/j.cnki.jrme.2014.1711

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Abstract In order to investigate the influence of shear rate on cyclic and post-cyclic shear behavior of sand-geogrid interface，a series of large scale direct shear，cyclic shear and post-cyclic direct shear tests were performed. The effect of shear rate on shear stress and volumetric strain at interface was studied. Moreover，comparison was made between the direct shear and post-direct shear test results. The results showed that the shear rate had little effect on shear behavior of interface in direct shear tests. On contrary，the cyclic shear stress softening and hardening were observed in the cases of low shear rate and high shear rate respectively. The interface behavior was significantly affected by the shear rate in cyclic shear tests and the shear strength of interface was impaired by cyclic loading. Overall，the influence of shear rate in post-cyclic direct shear tests was evident.

Key words： soil mechanics soil/geogrid interface shear rate cyclic shear monotonic direct shear

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2014.1711 OR http://www.rockmech.org/EN/Y2016/V35/I2/387

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