發(fā)布時(shí)間：2018-03-06 19:25

  本文選題：高填方邊坡　切入點(diǎn)：穩(wěn)定性　出處：《成都理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：近年來隨著國家經(jīng)濟(jì)實(shí)力的快速發(fā)展,國家加大了對基礎(chǔ)工程的建設(shè),越來越多的機(jī)場修建在山區(qū)。然而山區(qū)地形起伏變化大,機(jī)場建設(shè)就面臨著很多問題,為了滿足機(jī)場建設(shè)場區(qū)面積和凈空的要求,很多在山區(qū)建設(shè)的機(jī)場就會形成高填方。高填方邊坡穩(wěn)定性是機(jī)場修建過程當(dāng)中面臨的一個重大安全性問題。而一個邊坡發(fā)生失穩(wěn)的原因并不是單一的,往往是多種因素耦合而成的。本文中主要研究西南地區(qū)機(jī)場填筑高邊坡穩(wěn)定性影響因素,整個西南地區(qū)巖土體具有相似性,因此本文以攀枝花機(jī)場和達(dá)州機(jī)場為例著重選取地震、降雨、地下水以及填筑高度因素來逐個分析對邊坡穩(wěn)定性影響特征,論文主要工作如下:(1)闡明了影響滑坡失穩(wěn)的幾個關(guān)鍵因素的作用方式及作用機(jī)理,并針對性的為滑坡治理提供了參考意見。(2)分別研究了攀枝花機(jī)場、達(dá)州機(jī)場在地震單因素影響下的穩(wěn)定性變化規(guī)律,穩(wěn)定性系數(shù)隨地震水平加速度a的增加而遞減,呈良好的負(fù)線性關(guān)系,并分析了產(chǎn)生這一現(xiàn)象的主要原因。(3)分別研究了攀枝花機(jī)場、達(dá)州機(jī)場在降雨單因素影響下的穩(wěn)定性變化規(guī)律,當(dāng)降雨量較小時(shí),降雨量對穩(wěn)定性系數(shù)影響不大,當(dāng)降雨量達(dá)到某一極值時(shí),穩(wěn)定性系數(shù)陡降,并通過數(shù)值模擬軟件Geo Studio/seep模塊對這一現(xiàn)象進(jìn)行了詳細(xì)的分析。(4)根據(jù)攀枝花機(jī)場場地的具體情況,研究了滑坡后緣的地下水入滲對滑坡造成的影響,后緣滲水對該滑坡的穩(wěn)定性造成了很大的影響,并通過數(shù)值模擬軟件Geo Studio/seep模塊對這一現(xiàn)象進(jìn)行了詳細(xì)的分析。(5)分別以攀枝花機(jī)場、達(dá)州機(jī)場為例研究了填筑高度、填料的內(nèi)摩擦角、填料密度對高填方邊坡的影響,并總結(jié)了其影響規(guī)律。(6)以正交試驗(yàn)為指導(dǎo)思想通過多因素綜合分析得出,高填方邊坡穩(wěn)定性影響因素中的敏感程度較強(qiáng)的為:地震水平加速度,地下水滲流,降雨。
[Abstract]:In recent years, with the rapid development of national economic strength, the state has increased the construction of basic projects. More and more airports have been built in mountainous areas. In order to meet the requirements of the airport construction site area area and clearance, Many airports built in mountainous areas will form high fill. The stability of high fill slope is a major safety problem in the process of airport construction. The reason for the instability of a slope is not a single one. In this paper, the influence factors of the stability of the airport filling high slope in southwest China are studied, and the rock and soil in the whole southwest area are similar. Therefore, taking Panzhihua Airport and Dazhou Airport as examples, this paper focuses on selecting factors of earthquake, rainfall, groundwater and filling height to analyze the influence characteristics of slope stability one by one. The main work of this paper is as follows: (1) clarifying the action mode and mechanism of several key factors affecting landslide instability, and providing reference advice for landslide control. (2) studying Panzhihua Airport respectively. The stability variation law of Dazhou Airport under the influence of earthquake single factor, the stability coefficient decreases with the increase of horizontal acceleration a, and shows a good negative linear relationship. The main reasons for this phenomenon are analyzed.) the stability of Panzhihua Airport and Dazhou Airport under the influence of rainfall single factor is studied respectively. When rainfall is small, rainfall has little effect on stability coefficient. When the rainfall reaches a certain extreme, the stability coefficient drops steeply, and the phenomenon is analyzed in detail by the numerical simulation software Geo Studio/seep. 4) according to the concrete situation of Panzhihua Airport, The influence of groundwater infiltration on the landslide is studied, and the stability of the landslide is greatly affected by the seepage of the back edge. The numerical simulation software Geo Studio/seep module is used to analyze this phenomenon in detail. Taking Panzhihua Airport and Dazhou Airport as examples, the effects of filling height, filling internal friction angle and packing density on high fill slope are studied. Based on the orthogonal test, it is concluded that the sensitivity of the factors affecting the stability of high fill slope is: horizontal acceleration of earthquake, seepage of groundwater and rainfall.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU43

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本文編號：1576156