發(fā)布時間：2018-05-03 12:53

  本文選題：動力抗滑穩(wěn)定 + 雙系數(shù)強度折減�。� 參考：《大連理工大學(xué)》2014年碩士論文

【摘要】：隨著我國經(jīng)濟的快速發(fā)展,傳統(tǒng)能源的緊缺問題逐漸引起人們的重視,大力發(fā)展清潔能源,尋求替代能源成為新世紀我們解決能源問題的首要途徑。水電能源是清潔的可再生能源,是國家工業(yè)發(fā)展和人們?nèi)粘Ｉ畋夭豢缮俚闹匾蛩?水利發(fā)電科學(xué)技術(shù)的發(fā)展一直受到世界各界的高度重視�；炷林亓问俏覈こ探ㄖ锏闹匾獕涡椭�,在我國的西南、西北地區(qū)大量修建。而西南山區(qū)的地質(zhì)條件復(fù)雜勢必給我們的水電開發(fā)事業(yè)帶來巨大的挑戰(zhàn)。 根據(jù)水電中長期開發(fā)規(guī)劃,未來我國大中型水電開發(fā)的重心已經(jīng)轉(zhuǎn)移向高海拔,低氣溫的寒冷地區(qū),這些地區(qū)地質(zhì)構(gòu)造背景復(fù)雜,地震地質(zhì)災(zāi)害頻發(fā),給高壩的抗震設(shè)計和安全運行帶來的巨大的挑戰(zhàn)。大壩的抗滑穩(wěn)定分析對大壩的抗震安全評價至關(guān)重要。 本文針對重力壩地基的復(fù)雜性,考慮裂隙巖體的分布特性,分析和研究大壩地基塑形滑動區(qū)域的發(fā)展,推測出大壩的潛在滑移通道,研究其在動力作用下的穩(wěn)定性。 針對復(fù)雜基巖的強度參數(shù)的不確定性及對重力壩安全性的重大影響,采用雙系數(shù)強度折減法研究了Mohr-Coulomb準則中基巖強度參數(shù)粘聚力和內(nèi)摩擦角對重力壩基巖穩(wěn)定性的影響,并探討了不同判別指標下基巖強度參數(shù)的取值范圍,繪制出不同情況下材料強度參數(shù)的二維取值區(qū)域。 針對節(jié)理巖體的各向異性特性和不確定性及其對巖石強度參數(shù)的影響,從理論的角度分析了節(jié)理巖體各向異性的強度特征,指出單純從理論方面研究的不足及存在的問題,進而提出通過建立節(jié)理巖體的數(shù)值模型,應(yīng)用顯式有限差分程序(FLAC3D)的數(shù)值模擬試驗方法研究了節(jié)理巖體強度的各向異性特征。 針對復(fù)雜基巖地基的本構(gòu)關(guān)系對混凝土重力壩的抗滑穩(wěn)定的影響,考慮節(jié)理裂隙巖體的分布走向,采用了ubiquitous-joint模型和強度折減法相結(jié)合的形式來分析節(jié)理巖體地基的破壞形式,壩頂?shù)淖畲笪灰?不同節(jié)理傾角對安全系數(shù)的影響。
[Abstract]:With the rapid development of economy in our country, the shortage of traditional energy has been paid more and more attention. To develop clean energy and find alternative energy has become the first way to solve the energy problem in the new century. Hydropower energy is a clean and renewable energy, which is an indispensable factor for the development of national industry and people's daily life. The development of hydropower science and technology has been attached great importance to by all walks of life all over the world. Concrete gravity dam is one of the most important dam types in water conservancy engineering in China. The complex geological conditions in southwest mountainous area will bring great challenges to our hydropower development. According to the medium- and long-term hydropower development plan, in the future, the center of gravity of large and medium-sized hydropower development in China has shifted to cold areas with high altitude and low temperature. These areas have complex geological tectonic backgrounds and frequent seismic geological disasters. It brings great challenge to seismic design and safe operation of high dam. The stability analysis of the dam is very important to the seismic safety evaluation of the dam. In view of the complexity of gravity dam foundation, considering the distribution characteristics of fractured rock mass, this paper analyzes and studies the development of plastic sliding zone of dam foundation, infer the potential slip channel of dam and study its stability under dynamic action. In view of the uncertainty of strength parameters of complex bedrock and its great influence on the safety of gravity dam, the influence of cohesion force and angle of internal friction of bedrock strength parameters on the stability of gravity dam bedrock in Mohr-Coulomb criterion is studied by double coefficient strength reduction method. At the same time, the range of strength parameters of bedrock under different discriminant indexes is discussed, and the two-dimensional value regions of strength parameters of materials under different conditions are plotted. In view of the anisotropic characteristics and uncertainty of jointed rock mass and its influence on rock strength parameters, this paper analyzes the anisotropic strength characteristics of jointed rock mass from a theoretical point of view, and points out the shortcomings and problems in theoretical research. Furthermore, by establishing a numerical model of jointed rock mass and using the explicit finite difference program FLAC3D, the anisotropic characteristics of the strength of jointed rock mass are studied by using the numerical simulation test method. In view of the influence of constitutive relation of complex bedrock foundation on the stability of concrete gravity dam, considering the distribution trend of jointed fractured rock mass, the failure mode of jointed rock mass foundation is analyzed by combining ubiquitous-joint model and strength reduction method. The maximum displacement of the dam top and the influence of different joint inclination angle on the safety factor.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TV642.3;TV312

【參考文獻】

相關(guān)期刊論文 前10條

1 楊萍;陳洪;;對強度折減法中折減系數(shù)的討論[J];四川建筑科學(xué)研究;2010年04期

2 蔣鑫;邱延峻;凌建明;;強度折減法軟件在評價邊坡穩(wěn)定性上之比較[J];地下空間與工程學(xué)報;2008年02期

3 陳洪凱,唐紅梅;巖石工程巖體各向異性的顯現(xiàn)模式研究——以三峽工程永久船閘邊坡工程為例[J];重慶交通學(xué)院學(xué)報;2000年01期

4 欒茂田,武亞軍,年廷凱;強度折減有限元法中邊坡失穩(wěn)的塑性區(qū)判據(jù)及其應(yīng)用[J];防災(zāi)減災(zāi)工程學(xué)報;2003年03期

5 李紅;宮必寧;陳琰;;有限元強度折減法邊坡失穩(wěn)判據(jù)[J];水利與建筑工程學(xué)報;2007年01期

6 李錄賢;國松直;王愛琴;;無限元方法及其應(yīng)用[J];力學(xué)進展;2007年02期

7 王學(xué)濱;;節(jié)理傾角對單節(jié)理巖樣變形破壞影響的數(shù)值模擬[J];四川大學(xué)學(xué)報(工程科學(xué)版);2006年02期

8 賴國偉,陸述遠,常曉林,黃勁松;基于不等比例降強度參數(shù)的龍灘碾壓混凝土壩穩(wěn)定分析[J];水利水運工程學(xué)報;2002年02期

9 方從嚴,卓家壽;節(jié)理巖體數(shù)值仿真研究綜述[J];水利水運工程學(xué)報;2005年02期

10 馬力,張玉美,張良騫;重力壩深層抗滑穩(wěn)定計算的幾個問題[J];水利學(xué)報;1984年01期

相關(guān)博士學(xué)位論文 前1條

1 朱福巍;節(jié)理巖體細觀損傷模型的理論研究與數(shù)值方法[D];北京交通大學(xué);2011年

，

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