堆积层滑坡变形破坏机制分析及支挡结构数值模拟

发布时间：2017-12-28 01:20

本文关键词：堆积层滑坡变形破坏机制分析及支挡结构数值模拟　出处：《西南交通大学》2017年硕士论文　论文类型：学位论文

【摘要】：堆积层滑坡的发生在我国十分频繁,特别在西南地区,不仅量多广布,而且危害大。在此背景下,本学位论文开展了围绕堆积层滑坡的变形破坏机理、主要影响因素、稳定性评价、防治方案选取等主题的研究,主要工作如下:1.基于前人研究的成果,总结与分析了堆积层滑坡的特点,包括基本要素、稳定性分析方法、影响因素、破坏模式、防治方法。2.探测与分析了某堆积层滑坡的基本特性及形成机制。分析得出,该滑坡属浅层小型牵引式土质滑坡,由于长时间连续降雨,在地下水润滑及渗透压力影响下,坡脚首先产生滑移,牵引中上部第四系崩坡积松散堆积体沿基覆面下滑。3.分析了该堆积层滑坡的稳定性,且给出了综合防治建议。分析表明,该滑坡主要受公路改造及公路内侧居民房屋修建影响,整体尚处在欠稳定、局部蠕动变形阶段。建议采用抗滑桩、格构锚固、植物、夯填裂缝、截排水等综合防治措施加固该滑坡。4.采用ABAQUS有限元分析软件对该滑坡加固前后的应力、应变、位移及其稳定性状况进行数值模拟计算分析,并根据分析结果,优化了综合治理方案。
[Abstract]:The accumulation of landslide in China is very frequent, especially in the southwest, not only a large amount of cloth, but also great harm. Under this background, this thesis carried out the research on the theme of the accumulation of deformation and failure mechanism, the main factors affecting the landslide, stability evaluation, control scheme selection, the main work is as follows: 1. based on the results of previous studies, this paper summarizes and analyzes the accumulation of landslide characteristics, including the basic elements, stability analysis methods and influence factors and the failure mode, control method. 2. the basic characteristics and formation mechanism of a landslide are detected and analyzed. Analysis shows that the landslide belongs to shallow small traction type soil landslide, due to continuous rainfall, long time, lubrication and osmotic pressure in the groundwater under the influence of first toe slip traction in the upper part of the Quaternary colluvial slope of loose deposits along the base cover down. 3. the stability of the landslide is analyzed, and the comprehensive prevention and control suggestions are given. The analysis shows that the landslide is mainly affected by the highway reconstruction and the building of the inside of the highway, and the whole is still in the stage of under stable and local peristalsis. It is suggested that the landslide, such as anti slide pile, lattice anchorage, plant, rammed crack and cut drainage, should be adopted to reinforce the landslide. 4., ABAQUS finite element analysis software is used to simulate and analyze the stress, strain, displacement and stability of the landslide before and after reinforcement, and based on the analysis results, the comprehensive treatment plan is optimized.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P642.22

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