【摘要】：邊坡變形破壞機理及穩(wěn)定性問題是目前巖土工程領域的熱點和較為棘手的問題。越來越多的山區(qū)工程建設中不可避免的遭遇到了邊坡變形破壞的影響。對于不同邊坡的結構類型、變形破壞模式及機理等方面的深入研究便體現(xiàn)出其必要性。本文主要以黃蒿洼邊坡為主要研究對象,在地質資料收集、現(xiàn)場詳細勘察的基礎上,對黃蒿洼邊坡進行了結構類型劃分和穩(wěn)定性影響因素分析,結合有限元數(shù)值模擬對該邊坡變形破壞模式及機理進行了系統(tǒng)研究,并對其穩(wěn)定性進行了評價,主要開展了以下研究工作:(1)以黃蒿洼邊坡為研究對象,通過對現(xiàn)場勘察資料的整理,結合對現(xiàn)有邊坡資料的歸納總結,對黃蒿洼邊坡的結構類型、變形破壞模式進行分類研究。(2)從影響邊坡穩(wěn)定性的初始點和過程方面入手,將影響邊坡穩(wěn)定性的因素分為內部和外部因素。對影響黃蒿洼邊坡穩(wěn)定性的內部及外部因素進行了深入研究。(3)建立黃蒿洼邊坡不同組合類型的數(shù)值模型,采用Midas GTS有限元模擬軟件對其進行數(shù)值模擬分析,通過分析邊坡不同區(qū)段在不同工況下應力應變變化情況,對黃蒿洼邊坡變形破壞機理進行了研究。(4)研究對比不同的邊坡穩(wěn)定性評價理論和方法,采用極限平衡法原理中的瑞典條分法、Bishop法和Janbu法對不同結構類型邊坡進行穩(wěn)定性計算,對比有限元數(shù)值模擬強度折減法的結果,結合邊坡穩(wěn)定程度的定性分析,對黃蒿洼邊坡穩(wěn)定性進行了綜合評價。以上研究得出的結論對研究土質邊坡變形破壞機理及黃蒿洼邊坡防治工作具有一定的參考價值。
[Abstract]:Slope deformation and failure mechanism and stability are hot and difficult problems in the field of geotechnical engineering. More and more mountain projects inevitably encounter the influence of slope deformation and failure. It is necessary to study the structure type, deformation failure mode and mechanism of different slope. In this paper, the main research object is the Artemisia Artemisia slope. On the basis of the geological data collection and field detailed investigation, the structural type classification and the factors affecting the stability of the Artemisia annua slope are analyzed. Combined with finite element numerical simulation, the deformation and failure mode and mechanism of the slope are studied systematically, and the stability of the slope is evaluated. The main research work is as follows: (1) taking the Artemisia annua slope as the research object, Through sorting out the field survey data and summarizing the existing slope data, the structural types and deformation and failure modes of Artemisia annua slope are classified and studied. (2) starting from the initial point and process that affect the slope stability, The factors affecting slope stability are divided into internal and external factors. The internal and external factors affecting the stability of Artemisia annua slope are deeply studied. (3) the numerical model of different combination types of Artemisia annua slope is established, and the numerical simulation analysis is carried out by using Midas GTS finite element simulation software. The deformation and failure mechanism of Artemisia annua slope is studied by analyzing the variation of stress and strain in different sections of slope under different working conditions. (4) the different theories and methods of slope stability evaluation are studied and compared. The stability of slopes of different structural types is calculated by using the Swedish Strip-Bishop method and Janbu method in the principle of limit equilibrium. The results of the strength reduction method of finite element numerical simulation are compared with the qualitative analysis of the slope stability degree. The stability of Artemisia annua slope is evaluated. The above conclusions are valuable for studying the mechanism of soil slope deformation and failure and the prevention and treatment of Artemisia annua slope.
【學位授予單位】：長安大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P642.22

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