【摘要】：在我國(guó)有相當(dāng)一部分中小土石壩由于年久失修，地質(zhì)水文條件變化等因素作用下經(jīng)常發(fā)生壩坡滑塌現(xiàn)象，，對(duì)土石壩附近區(qū)域人民生命財(cái)產(chǎn)安全造成影響。對(duì)于那些肩負(fù)下游人民生命財(cái)產(chǎn)安全的土石壩，僅靠設(shè)計(jì)規(guī)范中采用的抗滑穩(wěn)定計(jì)算方法來控制壩體穩(wěn)定是不夠的，還需要找出一種方法來對(duì)將來由于各種因素變化而可能會(huì)發(fā)生的滑坡事故作出遠(yuǎn)期預(yù)測(cè)與災(zāi)害評(píng)估,以便作好相應(yīng)補(bǔ)救措施。 文章主要是依據(jù)國(guó)內(nèi)外滑坡建模計(jì)算的研究成果，基于能量守恒理論建立一種模擬滑坡破壞過程的一種連續(xù)塊體方法。該理論與一般連續(xù)塊體理論相比，前者是從能量守恒角度出發(fā)，不僅考慮了動(dòng)能勢(shì)能的轉(zhuǎn)化，還考慮了摩擦以及形變所帶來的能量的損耗。比起僅考慮動(dòng)能與勢(shì)能轉(zhuǎn)化的塊體連續(xù)理論，前者的考慮因素更全面，適用范圍更加廣泛。文章首先闡述了一種基于能量觀點(diǎn)的連續(xù)塊體理論的詳細(xì)內(nèi)容，然后將該理論應(yīng)用于理論模型與實(shí)際模型兩種模型上，把得到的模擬結(jié)果與實(shí)際結(jié)果進(jìn)行對(duì)比來證明理論與算法程序的準(zhǔn)確性。最后再將該理論應(yīng)用于一個(gè)土石壩滑坡實(shí)例中，通過改變填土的土性參數(shù)與壩前水位構(gòu)成不同工況組合，進(jìn)而研究不同工況下土石壩邊坡破壞過程與破壞機(jī)理。
[Abstract]:In China, a considerable number of small and medium-sized earth and rockfill dams often collapse under the influence of factors such as old disrepair and changes in geological and hydrological conditions, which have an impact on the safety of people's lives and property in the area near the earth and rock dams. For earth-rock dams that shoulder the safety of people's lives and property downstream, it is not enough to rely on the calculation method of anti-slide stability used in the design code to control the stability of the dam body. It is also necessary to find a way to make long-term prediction and disaster assessment of landslide accidents which may occur due to various factors in the future in order to make corresponding remedial measures. Based on the research results of landslide modeling and calculation at home and abroad and based on energy conservation theory, a continuous block method for simulating landslide failure process is established in this paper. Compared with the general continuous block theory, the former is based on the conservation of energy, considering not only the transformation of kinetic energy potential energy, but also the energy loss caused by friction and deformation. Compared with the block continuity theory which only considers kinetic energy and potential energy transformation, the former has more comprehensive factors and wider application range. In this paper, the detailed contents of a continuous block theory based on energy viewpoint are introduced, and then the theory is applied to both theoretical model and practical model. The simulation results are compared with the actual results to prove the accuracy of the theory and the algorithm program. Finally, the theory is applied to an example of earth-rockfill dam landslide. The failure process and failure mechanism of earth-rock dam slope under different working conditions are studied by changing the soil property parameters of the fill soil and the different working conditions of water level in front of the dam.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TV641;TV223

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本文編號(hào)：2264971