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

上海大学学报(自然科学版) ›› 2016, Vol. 22 ›› Issue (5): 637-647.doi: 10.3969/j.issn.1007-2861.2016.01.016

不同土工合成材料加筋土界面的静动力直剪特性

刘飞禹1, 沈春春1, 王军2,3, 王攀1

1. 上海大学土木工程系, 上海 200072；
2. 温州大学建筑工程学院, 浙江温州 325035；
3. 温州大学浙江省软弱土地基与海涂围垦工程技术重点实验室, 浙江温州 325035

收稿日期:2015-12-04 出版日期:2016-10-31 发布日期:2016-10-31
通讯作者: 王军(1980—), 男, 教授, 博士, 研究方向为软弱土动力学及地基处理学. E-mail: wangjunx9s@zju.edu.cn
作者简介:王军(1980—), 男, 教授, 博士, 研究方向为软弱土动力学及地基处理学. E-mail: wangjunx9s@zju.edu.cn
基金资助:
国家自然科学基金资助项目(51478255, 51678352); 上海市自然科学基金资助项目(14ZR1416100)；浙江省重点科技创新团队资助项目(2011R50020)

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

摘要/Abstract

摘要：

为研究不同加筋材料对筋-土界面在静力、动力作用下的剪切特性的影响, 采用大型直剪仪对土工编织布、土工无纺布、土工膜加筋的加筋土界面进行了一系列单调直剪试验、循环直剪试验和循环后单调直剪试验, 并将单调直剪试验与循环后单调直剪试验的结果进行对比分析. 结果表明：单调直剪试验中, 界面剪应力-剪切位移关系由于加筋筋材力学特性与结构特征不同, 呈现出较大差别, 其中筋材在较大竖向应力的剪切过程中容易发生变形; 在循环剪切过程中, 土工编织布、土工无纺布界面抗剪强度发生了软化现象, 而土工膜界面抗剪强度则发生了硬化现象.

关键词: 单调直剪, 筋材类型, 循环剪切, 筋土界面

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

刘飞禹1, 沈春春1, 王军2,3, 王攀1. 不同土工合成材料加筋土界面的静动力直剪特性[J]. 上海大学学报(自然科学版), 2016, 22(5): 637-647.

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.

参考文献

[1] Triplett E J, Fox P J. Shear strength of HDPE geomembrane/geosynthetic clay liner interfaces [J]. Journal of Geotechnical and Geoenvironmental Engineering, 2001, 127(6): 543-552.
[2] Esmaili D, Hatami K, Miller G A. Influence of matric suction on geotextile reinforcementmarginal soil interface strength [J]. Geotextiles and Geomembranes, 2014, 42(2): 139-153.
[3] Hatami K, Esmaili D. Unsaturated soil-woven geotextile interface strength properties from small-scale pullout and interface tests [J]. Geosynthetics International, 2015, 22(2): 161-172.
[4] 刘炜, 汪益敏, 陈页开, 等. 土工格室加筋土的大尺寸直剪试验研究[J]. 岩土力学, 2008, 29(11): 3133-3138.
[5] 包承纲. 土工合成材料界面特性的研究和试验验证[J]. 岩石力学与工程学报, 2006, 25(9): 1735-1744.
[6] Nye C, Fox P. Dynamic shear behavior of a needle-punched geosynthetic clay liner [J]. Journal of Geotechnical and Geoenvironmental Engineering, 2007, 133(8): 973-983.
[7] Moraci N, Cardile G. Influence of cyclic tensile loading on pullout resistance of geogrids embedded in a compacted granular soil [J]. Geotextiles and Geomembranes, 2009, 27(6): 475-487.

[8] Vieira C S, Lopes M L, Caldeira L M. Sand-geotextile interface characterisation through monotonic and cyclic direct shear tests [J]. Geosynthetics International, 2013, 20(1): 26-38.
[9] Fox P J, Ross J D, Sura J M, et al. Geomembrane damage due to static and cyclic shearing over compacted gravelly sand [J]. Geosynthetics International, 2011, 18(5): 272-279.
[10] 王家全, 王宇帆, 黄世斌, 等. 循环荷载作用下土工格栅剪切特性的颗粒流细观分析[J]. 水利学报, 2014, 45(9): 1082-1090.
[11] De A, Zimmie T F. Estimation of dynamic interfacial properties of geosynthetics [J]. Geosynthetics International, 1998, 5(1/2): 17-39.
[12] Kamalzare M, Zirie-Moayed R. Influence of geosynthenic reinforcement on the shear strength characteristics of two-layer sub-grade [J]. Acta Geotechnica Slovenica, 2011, 8(1): 39-49.
[13] Lopes P C, Lopes M L, Lopes M P. Shear behaviour of geosynthetics in the inclined plane test-influence of soil particle size and geosynthetic structure [J]. Geosynthetics International, 2001, 8(4): 327-342.
[14] 徐超, 陈洪帅, 石志龙, 等. 筋-土界面力学特性的水平循环剪切试验研究[J]. 岩土力学, 2013, 34(6): 1553-1559.
[15] 刘飞禹, 林旭, 王军. 砂土颗粒级配对筋土界面抗剪特性的影响[J]. 岩石力学与工程学报, 2013, 32(12): 2575-2582.
[16] 刘飞禹, 林旭, 王军, 等. 循环剪切作用对格栅与砂土界面剪切特性的影响[J]. 中国公路学报, 2015, 28(2): 1-7.
[17] 王家全, 周健, 黄柳云, 等. 土工合成材料大型直剪界面作用宏细观研究[J]. 岩土工程学报, 2013, 35(5): 908-915.
[18] 刘博, 李海波, 朱小明. 循环剪切荷载作用下岩石节理强度劣化规律试验模拟研究[J]. 岩石力学与工程学报, 2011, 30(10): 2033-2039.
[19] 王军, 王攀, 刘飞禹, 等. 密实度不同时格栅-砂土界面循环剪切及其后直剪特性[J]. 岩土工程学报, 2016, 38(2): 342-349.

不同土工合成材料加筋土界面的静动力直剪特性

Direct shear behavior of reinforcement soil interface in different geosynthetics

PDF

可视化

被引次数

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 2

编辑推荐

Metrics

本文评价

[1]	刘飞禹, 张端阳, 王军. 循环前后不同颗粒粒径下sandwich形加筋土筋土界面单调直剪特性[J]. 上海大学学报(自然科学版), 2018, 24(3): 456-466.
[2]	张骏, 林永亮. 网格状带齿加筋砂垫层界面特性的细观机理分析[J]. 上海大学学报(自然科学版), 2018, 24(1): 118-125.