多次冻融后格栅加筋黏土路堤工作性能分析

doi:10.7522/j.issn.1000-0240.2014.0178

冰川冻土 ›› 2014, Vol. 36 ›› Issue (6): 1490-1495.doi: 10.7522/j.issn.1000-0240.2014.0178

多次冻融后格栅加筋黏土路堤工作性能分析

赵荣飞¹, 高微², 宓永宁¹, 金丹¹

1. 沈阳农业大学水利学院, 辽宁沈阳 110866;
2. 沈阳农业大学工程学院, 辽宁沈阳 110866

收稿日期:2014-05-19 修回日期:2014-09-13 出版日期:2014-12-25 发布日期:2015-01-20
通讯作者: 高微, E-mail: snowwei28@126.com E-mail:snowwei28@126.com
作者简介:赵荣飞(1980-),男,江苏如东人,讲师,2012年在沈阳农业大学获博士学位,现主要从事岩土力学性能方面的科研和教学工作.E-mail:xngwrf@163.com
基金资助:
辽宁省高等学校科学研究一般项目(L2014270); 沈阳农业大学青年教师科研基金资助项目(20111008)资助

Analysis of the geogrid reinforced clay embankment's working performance after repeated freezing and thawing

ZHAO Rongfei¹, GAO Wei², MI Yongning¹, JIN Dan¹

1. College of Water Resource, Shenyang Agricultural University, Shenyang 110866, China;
2. College of Engineering, Shenyang Agricultural University, Shenyang 110866, China

Received:2014-05-19 Revised:2014-09-13 Online:2014-12-25 Published:2015-01-20

摘要/Abstract

摘要：

利用多次冻融后加筋黏土路堤相关试验参数对其进行有限元计算, 确定了加筋黏土结构各初始因素对其工作性能的影响规律, 并利用ABAQUS有限元计算软件对各种计算条件下的位移和应力进行求解, 确定了冻融循环后位移和应力的最大值. 结果显示: 增加加筋黏土路堤中的格栅层数可以减小冻融后加筋路堤的竖向和水平位移及土体剪应力最大值, 且格栅层数的增加对土体变形的影响强于对土体剪应力值的影响. 土体压实度的增大可以减小加筋路堤的竖向和水平位移, 同时引起土中剪应力数值的增大; 土体初始含水率的减小可以减小加筋路堤的竖向和水平位移, 同时引起土中剪应力数值的减小.

关键词: 格栅加筋黏土路堤, 多次冻融, 工作性能, 初始条件, 数值分析

Abstract:

In this paper, the experiment parameters of the geogrid reinforced clay embankment after freezing and thawing cycles were used to make a finite element analysis on various size models to determine the influence of the initial factors on the working performance of the reinforced clay structure. The finite element software ABAQUS was used to calculate the displacement and stress under the conditions of all kinds of calculation and the maximum of displacement and stress were gained. It is found that increase in reinforced geogrids within clay embankment can reduce vertical and horizontal displacements and the maximum shearing stress after freezing and thawing cycles, with the influence on soil's deformation stronger than on soil's shear stress; increase in soil's compaction degree can reduce the vertical and horizontal displacement of reinforced embankment and increase soil's shear stress; decrease in soil's initial moisture content can reduce the vertical and horizontal displacement of reinforced embankment and decrease soil's shear stress.

Key words: geogrid reinforced clay embankment, repeated freezing and thawing, working performance, initial conditions, numerical analysis

中图分类号:

TU41

赵荣飞, 高微, 宓永宁, 金丹. 多次冻融后格栅加筋黏土路堤工作性能分析[J]. 冰川冻土, 2014, 36(6): 1490-1495.

ZHAO Rongfei, GAO Wei, MI Yongning, JIN Dan. Analysis of the geogrid reinforced clay embankment's working performance after repeated freezing and thawing[J]. JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY, 2014, 36(6): 1490-1495.

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多次冻融后格栅加筋黏土路堤工作性能分析

Analysis of the geogrid reinforced clay embankment's working performance after repeated freezing and thawing

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