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非预应力锚杆格构模拟试验分析.pdf

发布:2017-07-21约5.36万字共73页下载文档
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The research of simulation about anchor and lattice frame A Dissertation Submitted for the Degree of Master Candidate:Gao Jie Supervisor:Prof. Men Yuming Chang’an University, Xi’an, China i 摘 要 滑坡是我国较为频发的地质灾害,它的发生常常会危及人民生命财产安全,非预应 力锚索格构作为一种加固坡体技术近年来在滑坡治理工程中应用越来越多,但对于锚索 和格构梁相互作用机理的研究比较滞后,因而限制了其在工程中的推广应用。 本文以中国地质调查局项目“滑坡防治格构锚固技术大型物理模拟试验研究 (工作 项目编码:1212011220145)”为依托,重点研究格构锚固体系在滑坡治理应用中的承 载机理、受力变形以及破坏等问题,主要研究内容及结果如下: (1)开展了滑坡基本模型试验和非预应力锚索格构模型试验,获得了大量的测试 数据。通过对测试数据的分析,得到坡体水平位移随加载的变化过程和格构梁地基反力 分布图。 (2 )在物理模型的基础上,进行了有限元数值模拟,得到了滑坡基本模型、未加 载情况下和加载 78kpa 下非预应力锚索格构体系位移分布、应力分布规律和破坏模式, 重点分析了锚索单元和格构梁单元的受力规律。 (3 )通过对模拟试验数据结果的分析,得到在不同加载情况下锚索单元轴力分布 图、未加载情况下及加载 78kpa 时格构梁内力分布图,并给出了格构锚索体系设计的建 议。最后,通过对梁后土体的分布形式的分析,提出了格构梁地基反力计算模式。 关键词:非预应力锚索格构,模型试验,数值模拟,位移,应力,内力 ii Abstract The landslide is a frequent disaster in China, it often demage the safety of life and property, anchor and lattice frame is a way to reinforce the slope which uses more and more frequently in recent years, but the research of anchor and lattice frame how to interact each other on the slope is relatively backward, limiting it’s application. The article is based on the China Geological Survey Project Large Physical Model Test on lattice and anchor frame for landslide (The number is 1212011220145)which focus on the deformation and destruction about anchor and lattice frame in the application of landslide prevention. The main research contents and results are as follows: (1)Doing landslide model test respectively, which are landslide basic parameters in physical model test and large scale physical model test ,obtaining a large amount of test data.
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