本文選題：關(guān)鍵滑動面 + 最危險滑動面��； 參考：《長沙理工大學》2013年碩士論文

【摘要】：在邊坡工程中，通常是通過計算分析確定具有最小安全系數(shù)的最危險滑動面，進而對邊坡的穩(wěn)定性進行評價，并做出相應(yīng)的處治方案。然而很多工程實例表明，僅憑最危險滑動面往往不能真實地表示邊坡的穩(wěn)定性程度，也不能充分滿足支護設(shè)計的要求。眾所周知，邊坡加固方案設(shè)計是根據(jù)滑坡推力的大小來進行的，然而，最危險滑動面計算得到的滑坡推力并不一定就是該邊坡存在的最大滑坡推力；同時，邊坡處治涉及到處治范圍，若僅針對最危險滑動面進行加固處治而不考慮處治范圍，就不能保證處治效果。 本文針對邊坡工程研究現(xiàn)狀，提出了使用一組在邊坡穩(wěn)定性評價和處治中起控制作用的潛在滑動面來解決邊坡穩(wěn)定性評價及邊坡處治問題。本文將這一組在邊坡處治中起著控制作用的潛在滑動面定義為關(guān)鍵滑動面，并在提出關(guān)鍵滑動面概念的基礎(chǔ)上，以土質(zhì)邊坡問題為研究對象，展開了如下研究： 1、針對目前在邊坡工程中通常僅憑最危險滑動面進行穩(wěn)定性分析和處治設(shè)計不足，提出了關(guān)鍵滑動面的概念。關(guān)鍵滑動面共包括三種滑動面，即反映邊坡穩(wěn)定程度的最危險滑動面，邊坡處治時控制滑坡推力設(shè)計的最大滑坡推力滑動面和反映邊坡潛在滑動區(qū)域的最深滑動面。 2、研究了最大滑坡推力滑動面的實現(xiàn)方法。假定滑動面為圓弧滑動面，采用固定模式搜索法進行最危險滑動面的搜索，并采用不平衡推力法計算所有潛在滑動面的剩余下滑力。通過對所有潛在滑動面對應(yīng)的剩余下滑力的比較，，找出最大滑坡推力滑動面。 3、應(yīng)用c++的微軟基礎(chǔ)類庫（MFC），在vs2010環(huán)境下編制了面向?qū)ο蟮倪吰路�(wěn)定性分析程序——基于關(guān)鍵滑動面的邊坡穩(wěn)定性分析程序。本程序共包括模型建立和參數(shù)設(shè)置、最危險滑動面搜索模塊和擴展模塊三大模塊，其中擴展模塊又包括最大滑坡推力滑動面模塊和最深滑動面模塊。 4、分別采用研制的程序和商業(yè)軟件對經(jīng)典算例進行了計算分析，驗證了程序的正確性。對三種關(guān)鍵滑動面之間的關(guān)系進行了比較，并論證了最大滑坡推力滑動面和最深滑動面在邊坡處治中的工程意義。 5、在編制邊坡穩(wěn)定性分析程序時，根據(jù)在邊坡穩(wěn)定性分析中滑動面的數(shù)據(jù)結(jié)構(gòu)特點，本文選擇了高效的容器結(jié)構(gòu)存儲滑動面的數(shù)據(jù)。
[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.
【學位授予單位】：長沙理工大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TU753.8

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