基于最小势能原理的挡土墙加固边坡三维稳定性分析方法

发布时间：2018-06-17 06:02

本文选题：三维稳定性分析 + 挡土墙加固　；参考：《江西理工大学》2015年硕士论文

【摘要】：随着国家西部大开发战略的继续推进,高速公路和铁路、市政工程等基础建设发展迅速,其带来的一系列边坡稳定性问题已经成为事关工程成败的重要因素。实际工程中,边坡失稳多数是呈现三维破坏状态,对其进行三维稳定性分析,可以获得更加真实、符合实际的分析结果,以及减少不必要的损失与浪费。对于不稳定边坡的处理,常用的措施是采取相应的支挡结构进行加固处理。挡土墙以其结构形式简单、施工方便、造价低廉和便于就地取材等诸多优点在工程中得到了广泛的应用。本文针对任意形状的滑裂面,基于最小势能原理,建立了三维边坡稳定性分析方法,并在该分析方法的基础上进一步提出了挡土墙加固边坡的三维最小势能分析法。文中的主要研究内容包括以下几个方面:(1)针对任意形状的滑裂面,把滑体作为一个整体,建立三维计算模型,得到滑体的总势能,基于最小势能原理,求得滑体位移,通过选择合理的安全系数计算方式,提出了三维边坡最小势能稳定性分析方法。(2)对于挡土墙加固边坡,建立三维计算模型时考虑了挡土墙与土体接触面之间所储存的势能,基于以上建立的三维最小势能法,提出了挡土墙加固边坡三维最小势能稳定性分析方法。(3)为了方便分析与计算,基于以上建立的分析方法,运用MATLAB软件,将计算模块与界面模块相结合,开发了边坡以及挡土墙加固边坡的三维稳定性分析程序。(4)将本文提出的方法应用于挡土墙加固公路路堑边坡和挡土墙加固基坑工程实例中,验证了本文所提出方法的工程实用性。
[Abstract]:With the development of national western development strategy and the rapid development of highway, railway, municipal engineering and other infrastructure, a series of slope stability problems have become an important factor related to the success or failure of the project. In practical engineering, the slope instability is mostly presented in the state of three dimensional failure. The analysis of the three dimensional stability of the slope can get more realistic, accord with the actual analysis results, and reduce the unnecessary loss and waste. For the treatment of unstable slope, the common measure is to adopt the corresponding retaining structure to reinforce the slope. Retaining wall has been widely used in engineering with its advantages such as simple structure, convenient construction, low cost and easy to use local materials. In this paper, based on the principle of minimum potential energy, a three-dimensional slope stability analysis method is established for a sliding surface with arbitrary shape. Based on this method, a three-dimensional minimum potential energy analysis method for retaining wall strengthening slope is proposed. The main research contents in this paper include the following aspects: 1) for the sliding surface of arbitrary shape, the sliding body is taken as a whole, and the three-dimensional calculation model is established, and the total potential energy of the sliding body is obtained. Based on the principle of minimum potential energy, the displacement of the sliding body is obtained. By selecting a reasonable calculation method of safety factor, the method of minimum potential energy stability analysis of three-dimensional slope is put forward. The potential energy stored between retaining wall and soil interface is taken into account when the three-dimensional calculation model is established for the reinforcement of slope with retaining wall. Based on the three dimensional minimum potential energy method established above, a method for analyzing the stability of the three dimensional minimum potential energy of retaining wall reinforced slope is put forward. In order to facilitate the analysis and calculation, the MATLAB software is used based on the above analysis method. Combining the calculation module with the interface module, the three-dimensional stability analysis program of slope and retaining wall reinforced slope is developed. The method proposed in this paper is applied to the engineering example of retaining wall strengthening highway cutting slope and retaining wall strengthening foundation pit. The engineering practicability of the proposed method is verified.
【学位授予单位】：江西理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU43;TU476.4

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