不同土工合成材料加筋土界面的静动力直剪特性

doi:10.3969/j.issn.1007-2861.2016.01.016

Journal of Shanghai University（Natural Science Edition） ›› 2016, Vol. 22 ›› Issue (5): 637-647.doi: 10.3969/j.issn.1007-2861.2016.01.016

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Direct shear behavior of reinforcement soil interface in different geosynthetics

LIU Feiyu1, SHEN Chunchun1, WANG Jun2,3, WANG Pan1

1. Department of Civil Engineering, Shanghai University, Shanghai 200072, China;
2. College of Civil Engineering and Architecture, Wenzhou University, Wenzhou 325035, Zhejiang, China;
3. Key Laboratory of Engineering and Technology for Soft Soil Foundation and Tideland Reclamation of Zhejiang Province, Wenzhou 325035, Zhejiang, China

Received:2015-12-04 Online:2016-10-31 Published:2016-10-31

Abstract

Abstract:

To investigate the reinforcement soil interface cyclic and post-cyclic shear behavior in different geosynthetic materials (woven geotextile, nonwoven geotextile, geomembrane), a series of direct shear tests, cyclic shear tests and post-cyclic direct shear tests were performed through a large-scale direct shear device. Comparison and analysis were made between the results from direct shear tests and post-cyclic direct shear tests. In the direct shear tests, the interface shear stress-displacement curve presented large difference due to different material mechanical properties and structural characteristics. More evident deformation was observed in higher vertical stress. Cyclic shear stress degradation was observed in both woven and nonwoven geotextile-sand interfaces, whereas hardening phenomenon appeared in the geomembrane-sand interface.

Key words: cyclic shear, monotonic direct shear, reinforced materials type, soil-geosynthetic interface

LIU Feiyu1, SHEN Chunchun1, WANG Jun2,3, WANG Pan1. Direct shear behavior of reinforcement soil interface in different geosynthetics[J]. Journal of Shanghai University（Natural Science Edition）, 2016, 22(5): 637-647.

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Direct shear behavior of reinforcement soil interface in different geosynthetics

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