边坡工程中关键滑动面研究及其程序研发

发布时间：2018-06-22 03:17

本文选题：关键滑动面 + 最危险滑动面　；参考：《长沙理工大学》2013年硕士论文

【摘要】：在边坡工程中，通常是通过计算分析确定具有最小安全系数的最危险滑动面，进而对边坡的稳定性进行评价，并做出相应的处治方案。然而很多工程实例表明，仅凭最危险滑动面往往不能真实地表示边坡的稳定性程度，也不能充分满足支护设计的要求。众所周知，边坡加固方案设计是根据滑坡推力的大小来进行的，然而，最危险滑动面计算得到的滑坡推力并不一定就是该边坡存在的最大滑坡推力；同时，边坡处治涉及到处治范围，若仅针对最危险滑动面进行加固处治而不考虑处治范围，就不能保证处治效果。本文针对边坡工程研究现状，提出了使用一组在边坡稳定性评价和处治中起控制作用的潜在滑动面来解决边坡稳定性评价及边坡处治问题。本文将这一组在边坡处治中起着控制作用的潜在滑动面定义为关键滑动面，并在提出关键滑动面概念的基础上，以土质边坡问题为研究对象，展开了如下研究： 1、针对目前在边坡工程中通常仅凭最危险滑动面进行稳定性分析和处治设计不足，提出了关键滑动面的概念。关键滑动面共包括三种滑动面，即反映边坡稳定程度的最危险滑动面，边坡处治时控制滑坡推力设计的最大滑坡推力滑动面和反映边坡潜在滑动区域的最深滑动面。 2、研究了最大滑坡推力滑动面的实现方法。假定滑动面为圆弧滑动面，采用固定模式搜索法进行最危险滑动面的搜索，并采用不平衡推力法计算所有潜在滑动面的剩余下滑力。通过对所有潜在滑动面对应的剩余下滑力的比较，，找出最大滑坡推力滑动面。 3、应用c++的微软基础类库（MFC），在vs2010环境下编制了面向对象的边坡稳定性分析程序——基于关键滑动面的边坡稳定性分析程序。本程序共包括模型建立和参数设置、最危险滑动面搜索模块和扩展模块三大模块，其中扩展模块又包括最大滑坡推力滑动面模块和最深滑动面模块。 4、分别采用研制的程序和商业软件对经典算例进行了计算分析，验证了程序的正确性。对三种关键滑动面之间的关系进行了比较，并论证了最大滑坡推力滑动面和最深滑动面在边坡处治中的工程意义。 5、在编制边坡稳定性分析程序时，根据在边坡稳定性分析中滑动面的数据结构特点，本文选择了高效的容器结构存储滑动面的数据。
[Abstract]:In slope engineering, the most dangerous sliding surface with minimum safety factor is usually determined by calculation and analysis, and then the slope stability is evaluated and the corresponding treatment scheme is made. However, many engineering examples show that only the most dangerous sliding surface can not truly express the stability of the slope, nor can it fully meet the requirements of the support design. As we all know, the design of slope reinforcement scheme is based on the magnitude of landslide thrust. However, the landslide thrust calculated by the most dangerous sliding surface is not necessarily the maximum landslide thrust existing in the slope; at the same time, Slope treatment involves the scope of treatment. If only the most dangerous sliding surface is strengthened and the scope of treatment is not considered, the treatment effect can not be guaranteed. In this paper, a set of potential sliding surfaces which play a controlling role in the evaluation and treatment of slope stability are proposed to solve the problem of slope stability evaluation and slope treatment. In this paper, a group of potential slip surfaces which play a controlling role in slope treatment are defined as critical sliding surfaces. Based on the concept of critical sliding surfaces, the problem of soil slopes is considered as an object of study. The following researches are carried out: 1. Aiming at the problem of stability analysis and design of the most dangerous sliding surface in slope engineering at present, the concept of critical sliding surface is put forward. The critical slip surface consists of three sliding surfaces, the most dangerous sliding surface, which reflects the stability of the slope. The maximum landslide thrust sliding surface and the deepest sliding surface reflecting the potential sliding area of the slope are controlled when the slope is treated. 2. The realization method of the maximum landslide thrust sliding surface is studied. Assuming that the sliding surface is an arc sliding surface, the most dangerous sliding surface is searched by fixed mode search method, and the residual sliding force of all potential sliding surfaces is calculated by unbalanced thrust method. By comparing the residual sliding forces corresponding to all potential sliding surfaces, To find out the maximum landslide thrust sliding surface. 3. Using the Microsoft Foundation Class Library (MFC) of c, an object-oriented slope stability analysis program based on critical sliding surface is developed under vs2010 environment. This procedure includes three modules: model building and parameter setting, most dangerous sliding surface searching module and extending module. The extension module also includes the maximum landslide thrust sliding surface module and the deepest sliding surface module. 4. The program and commercial software are used to calculate and analyze the classic examples to verify the correctness of the program. The relationship between the three key sliding surfaces is compared, and the engineering significance of the maximum landslide thrust sliding surface and the deepest sliding surface in slope treatment is demonstrated. 5. When compiling the slope stability analysis program, According to the data structure characteristics of sliding surface in slope stability analysis, an efficient container structure is selected to store sliding surface data.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU753.8

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