边坡抗滑桩受力与变形特点分析

发布时间：2018-01-21 13:32

本文关键词： 抗滑桩受力变形数值模拟 PLAXIS 稳定性　出处：《重庆交通大学》2014年硕士论文　论文类型：学位论文

【摘要】：我国地形复杂，地质条件多样，因而在道路、铁道等工程领域，我们要面对很多的路基及边坡相关的问题，，而这里面我们最主要面对的是边坡的稳定与治理等工程实际问题。 ○1在边坡问题的设计阶段，一般都是通过地质勘查，来了解坡体的基本情况，然后基于强度理论设计来分析坡体的稳定性，通过计算来设置抗滑桩，对边坡进行治理。但是设置抗滑桩以后，在工程运行中，边坡的稳定性由于各种因素可能会不断的变化，甚至可能再次失稳。因此要对边坡进行监测，通过监测来评价稳定性，而强度理论没有考虑变形，由监测得到的变形数据没办法通过强度理论来进行稳定性分析，只能采用变形理论，但是通过变形数据来评价边坡的稳定性相关成果还不成熟，没办法采用，所以本文进行这方面的研究。 ○2由于自然界边坡的形态、支挡结构的类型非常复杂，考虑到普适性的问题，所以本文只针对抗滑桩加固土质高边坡为例，对不同参数下坡体进行模拟，来分析桩的变形和坡体稳定性的关系，为工程中通过监测抗滑桩的变形来考虑坡体稳定性提供相关方法。本文以典型的土质高边坡为研究对象，主要研究内容有以下几个方面： 1）以工程实例为基础，利用PLAXIS有限元软件，以软件中的PHI-C折减计算方法对抗滑桩加固土质高边坡进行稳定性分析。 2)采用数值模拟方法分析抗滑桩受力与变形。 3)分别考虑坡高、内摩擦角、粘聚力等参数的变化，对各种参数下的模型进行模拟分析，得出抗滑桩的变形及安全系数等相关数据，在此基础上研究抗滑桩变形与边坡稳定性之间的关系。 4)考虑土体蠕变情形下对坡高、内摩擦角、粘聚力等不同的参数模型进行分析，得出抗滑桩的变形及安全系数等相关数据，在此基础上研究抗滑桩变形与边坡稳定性之间的关系；对比分析PLAXIS中弹塑性模型和蠕变模型中的边坡抗滑桩变形。本文研究取得的主要成果对以后边坡工程中稳定性分析及为工程中通过监测抗滑桩的变形来考虑坡体稳定性提供相应方法。
[Abstract]:Because of the complex terrain and various geological conditions in China, we have to face a lot of roadbed and slope related problems in the engineering fields such as roads, railways and so on. And here we are faced with the slope stability and governance and other engineering practical problems. In the design stage of slope problem, the basic situation of slope body is generally understood through geological survey, and then the stability of slope body is analyzed based on strength theory design, and the anti-slide pile is set up by calculation. But after setting the anti-slide pile, the slope stability may change continuously because of various factors, and even may be unstable again. Therefore, the slope should be monitored. The stability is evaluated by monitoring, but deformation is not considered in strength theory. The deformation data obtained from monitoring can not be analyzed by strength theory, but only by deformation theory. However, it is not mature to evaluate slope stability by deformation data. 02 because of the natural slope shape, the type of retaining structure is very complex, considering the problem of universality, so this paper only for the anti-slide pile reinforcement of high soil slope as an example, the different parameters of the slope body simulation. To analyze the relationship between pile deformation and slope stability, and to provide a relevant method for considering slope stability by monitoring the deformation of anti-slide pile in engineering. In this paper, the typical high soil slope as the research object, the main research contents are as follows: 1) on the basis of engineering example, the stability analysis of high soil slope strengthened by slide pile is carried out by using PLAXIS finite element software and PHI-C reduction calculation method in the software. 2) numerical simulation method is used to analyze the force and deformation of anti-slide pile. 3) considering the variation of slope height, internal friction angle, cohesion and other parameters, the model under various parameters is simulated and analyzed, and relevant data such as deformation and safety factor of anti-slide pile are obtained. On this basis, the relationship between deformation of anti-slide pile and slope stability is studied. 4) under the condition of soil creep, the paper analyzes the different parameter models such as slope height, internal friction angle, cohesion and so on, and obtains the deformation and safety factor of anti-slide pile and other relevant data. On this basis, the relationship between deformation of anti-slide pile and slope stability is studied. The deformation of slope anti-slide pile in elastic-plastic model and creep model in PLAXIS is compared and analyzed. The main results obtained in this paper provide a method to analyze the stability of slope in the future and to consider the stability of slope by monitoring the deformation of anti-slide pile.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.14;U213.13

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