本文選題：黃土邊坡　切入點(diǎn)：數(shù)值模擬　出處：《長(zhǎng)安大學(xué)》2015年碩士論文

【摘要】：黃土在我國(guó)分布面積廣,厚度大。黃土滑坡是我國(guó)分布很廣泛,破壞很嚴(yán)重的一種自然災(zāi)害,對(duì)人民生命和財(cái)產(chǎn)安全造成了極大危害,因此研究黃土邊坡,在防災(zāi)減災(zāi)領(lǐng)域有著重要意義,數(shù)值模擬方法是研究黃土滑坡的較為有效的方法。本文在總結(jié)分析黃土邊坡類型、成因、破壞方式的基礎(chǔ)上,研究了黃土邊坡在地震作用下和水滲流作用下邊坡穩(wěn)定性的變化。獲取的主要認(rèn)識(shí)如下:(1)總結(jié)了黃土邊坡的成因、類型、破壞形式等(2)概括了邊坡計(jì)算的基本模型如極限平衡法-簡(jiǎn)化畢曉普法,強(qiáng)度折減法和非飽和滲流的物理模型等;(3)用ABQUS軟件分析了在地震作用下不同結(jié)構(gòu)黃土邊坡的加速度、形變、應(yīng)力等,總結(jié)出軟弱夾層傾角不同黃土邊坡對(duì)地震荷載的不同響應(yīng),得出規(guī)律性結(jié)論。結(jié)果表明隨著軟弱夾層傾角反傾到正傾,逐漸增加的過程中,邊坡對(duì)地震的響應(yīng)也隨著增強(qiáng);(4)用GeoStudio軟件分析在集中入滲,降雨入滲,庫水位突然下降等與水有關(guān)工況,黃土邊坡穩(wěn)定性的變化,總結(jié)出規(guī)律性結(jié)論。表明入滲點(diǎn)的位置不同,對(duì)邊坡穩(wěn)定性影響巨大。在考慮總降雨量一樣的情況下,降水時(shí)間越大邊坡穩(wěn)定性越差。庫水位突然下降的情況下,由于內(nèi)部孔隙水壓力還沒有來的及消散,而外界水壓力消失,造成穩(wěn)定性下降。
[Abstract]:Loess landslide is a kind of natural disaster which is widely distributed and seriously damaged in our country, which has caused great harm to people's life and property safety, so the loess slope is studied. In the field of disaster prevention and mitigation, numerical simulation method is an effective method to study loess landslide. The variation of slope stability under earthquake and water seepage is studied. The main knowledge obtained is as follows: 1) the causes and types of loess slope are summarized. The basic models of slope calculation, such as the limit equilibrium method, the simplified Bixiaopu method, the strength reduction method and the physical model of unsaturated seepage, are summarized. The acceleration of loess slope with different structures under earthquake action is analyzed by ABQUS software. Deformation, stress and so on, the different responses of loess slope with different dip angles of weak intercalation to earthquake load are summarized, and the regular conclusions are drawn. The results show that with the dip of weak intercalation tilting backwards to the positive inclination, the slope gradually increases. The response of slope to earthquake is also enhanced with the increase of earthquake. The GeoStudio software is used to analyze the variation of stability of loess slope under the conditions of concentrated infiltration, rainfall infiltration and sudden drop of reservoir water level. The results show that the location of infiltration point is different. The larger the precipitation time, the worse the slope stability. When the reservoir water level drops suddenly, because the internal pore water pressure has not come and dissipates, But the external water pressure disappears, causes the stability to drop.
【學(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU43

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 孟秦倩,王健,齊清孝;基于vb的畢肖普法土坡穩(wěn)定的程序計(jì)算法[J];水利與建筑工程學(xué)報(bào);2005年01期

2 喬國(guó)文,王運(yùn)生,房冬恒;西南某電站右岸開挖邊坡穩(wěn)定性的FLAC~(3D)分析[J];工程地質(zhì)學(xué)報(bào);2004年03期

3 趙建軍;黃潤(rùn)秋;巨能攀;涂國(guó)祥;肖華波;;下伏軟弱層黃土邊坡變形機(jī)制分析及治理對(duì)策研究[J];工程地質(zhì)學(xué)報(bào);2006年06期

4 宋焱勛;彭建兵;張駿;;黃土填方高邊坡變形破壞機(jī)制分析[J];工程地質(zhì)學(xué)報(bào);2008年05期

5 周春梅;李先福;;大冶鐵礦高陡巖質(zhì)邊坡變形破壞機(jī)理分析[J];合肥工業(yè)大學(xué)學(xué)報(bào)(自然科學(xué)版);2009年10期

6 王玉平;曾志強(qiáng);潘樹林;;邊坡穩(wěn)定性分析方法綜述[J];西華大學(xué)學(xué)報(bào)(自然科學(xué)版);2012年02期

7 楊濤;周德培;蘇金蓉;;大變形有限元法分析邊坡穩(wěn)定性[J];山地學(xué)報(bào);2006年01期

8 舒暢;段輝杰;周俊;;某礦山邊坡巖體結(jié)構(gòu)及圍巖質(zhì)量評(píng)價(jià)[J];土工基礎(chǔ);2007年01期

9 姚志華;陳正漢;黃雪峰;覃小華;章峻豪;;非飽和Q_3黃土滲氣特性試驗(yàn)研究[J];巖石力學(xué)與工程學(xué)報(bào);2012年06期

10 吳春秋,朱以文,蔡元奇;邊坡穩(wěn)定臨界破壞狀態(tài)的動(dòng)力學(xué)評(píng)判方法[J];巖土力學(xué);2005年05期

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