二级土工格室柔性挡墙优化断面型式研究

发布时间：2018-01-20 01:54

本文关键词： 土工格室柔性挡墙加长土工格室层加筋位置加筋长度数值模拟　出处：《公路》2017年06期 　论文类型：期刊论文

【摘要】：土工格室柔性挡墙已广泛应用于土木工程边坡防护之中。实际工程中常会出现高边坡,当防护此类边坡采用的是土工格室柔性挡墙时通常设置为二级或者多级型式。同时,为减小水平位移,提高挡墙安全系数,可加长墙背填料中某几层的土工格室长度来增强加筋作用。文中采用岩土工程有限元软件Plaxis,探讨了加长土工格室层的位置、层数和长度变化对二级挡墙力学特性的影响。研究结果表明:在二级挡墙下部距墙底1/3墙高位置对土工格室层进行一定的加长时,挡墙的安全系数最大;在二级挡墙中下部加长一定层数的土工格室层,能较显著地减小挡墙的水平位移和提高挡墙的安全系数;当加长土工格室层的长度等于3/4墙高时,挡墙的安全系数最大。
[Abstract]:The flexible retaining wall of geogrid room has been widely used in slope protection of civil engineering. In order to reduce the horizontal displacement, the safety factor of retaining wall is improved. The reinforcement effect can be enhanced by lengthening the length of several layers of geogrid in the backfill of the wall. In this paper, the location of the extended geotechnical compartment layer is discussed by using the finite element software Plaxis of geotechnical engineering. The results show that the safety factor of the retaining wall is the greatest when the height of the lower part of the secondary retaining wall is 1/3 from the bottom of the wall and the geogrid chamber layer is lengthened to a certain extent. The horizontal displacement of the retaining wall and the safety factor of the retaining wall can be significantly reduced by adding a certain number of layers to the lower part of the secondary retaining wall. The maximum safety factor of the retaining wall is obtained when the length of the geoglass layer is equal to 3/4 wall height.
【作者单位】：长安大学公路学院;中国航空港建设第九工程总队;
【基金】：住房与城乡建设部科学技术项目计划——研究开发项目,项目编号2015-K2-008
【分类号】：U417.11
【正文快照】： 土工格室柔性挡墙,因其结构轻、施工简便、造价低廉和美化环境等优点,已广泛应用于路堤和路堑边坡防护中。对土工格室柔性挡墙所进行的大量研究,促进了它在工程实践中的应用。傅舰锋(2002)[1]、顾良军(2004)[2]和杨晓华(2005)[3]分别通过大型直剪试验、三轴剪切试验、压缩试验

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