本文選題：托巴水電站D1邊坡 + 穩(wěn)定性分析　； 參考：《西北農(nóng)林科技大學(xué)》2014年碩士論文

【摘要】：D1邊坡是托巴庫區(qū)滑坡群中的一個關(guān)鍵邊坡，位于托巴水電站左岸初擬壩軸線下游，距壩下游電站出水口較近，該滑坡體沿河長約430m，分布高程1620m～1845m，后緣邊界呈弧圈形，下游側(cè)邊界見完整的基巖，中部為一緩坡平臺，前緣延伸至河床，沿水邊線未見基巖出露。D1邊坡坡體已經(jīng)下臥到河床，而河床構(gòu)成了強(qiáng)大的反力體，整體穩(wěn)定性較好；其中上部局部滑體穩(wěn)定安全系數(shù)不高，尤其在暴雨（泄洪霧化）工況下，很可能發(fā)生變形，嚴(yán)重影響到大壩及泄水建筑物的運(yùn)行及安全。因此對D1邊坡進(jìn)行穩(wěn)定性分析及加固治理，具有重要的理論意義和工程價值。 本文采用極限平衡法，，對邊坡的穩(wěn)定性進(jìn)行分析，并給出建議的治理措施，研究的主要內(nèi)容如下： （1）通過項(xiàng)目現(xiàn)場的地質(zhì)調(diào)查，查明邊坡的工程地質(zhì)條件、變形破壞形式，并進(jìn)行現(xiàn)場原位試驗(yàn)，得出物理力學(xué)性質(zhì)指標(biāo)，確定了邊坡穩(wěn)定分析的力學(xué)參數(shù)。 （2）本文依據(jù)極限平衡法，針對D1邊坡的4個主要滑坡剖面進(jìn)行穩(wěn)定分析。計算控制工況分為持久工況、短暫工況、偶然工況三種，可得出相應(yīng)工況下各邊坡對應(yīng)的安全系數(shù)。通過二維極限平衡計算結(jié)果表明：D1邊坡整體上是穩(wěn)定的，但在短暫工況下安全富余不足。 （3）分析材料的參數(shù)變化對穩(wěn)定性的影響。進(jìn)行材料劣化對邊坡穩(wěn)定敏感性分析，進(jìn)一步分析了地震對邊坡穩(wěn)定敏感性。 （4）在以上分析的基礎(chǔ)上研究合理的加固處理措施，并根據(jù)地質(zhì)情況和初步加固方案，建立對應(yīng)的計算模型，研究加固方案在各荷載組合下邊坡的抗滑穩(wěn)定性，評價加固方案的有效性和邊坡的整體穩(wěn)定性，并對開挖過程中邊坡的穩(wěn)定性進(jìn)行分析，為邊坡開挖及支護(hù)措施提供依據(jù)。
[Abstract]:D1 slope is a key slope in the landslide group of Toba reservoir area. It is located at the downstream of the initial dam axis on the left bank of Toba Hydropower Station and is close to the outlet of the power station at the downstream of the dam. The landslide body is about 430m long along the river with a distribution elevation of 1620m / 1845m, and the back edge boundary is arcuate. There are complete bedrock in the downstream side boundary, a gentle slope platform in the middle, leading edge extending to the riverbed, no bedrock outcropping along the edge line. The slope body has been lying down to the riverbed, and the riverbed has formed a strong reaction body, and the overall stability is good. The stability safety factor of the upper part of the sliding body is not high, especially under the condition of heavy rain (flood discharge atomization), the deformation is likely to occur, which seriously affects the operation and safety of the dam and the drainage structure. Therefore, the stability analysis and reinforcement of D1 slope have important theoretical significance and engineering value. In this paper, the limit equilibrium method is used to analyze the stability of the slope, and the proposed treatment measures are given. The main contents of the study are as follows: 1) through the geological investigation on the site of the project, the engineering geological conditions and the form of deformation and failure of the slope are found out, and the field in-situ test is carried out, and the physical and mechanical properties are obtained, and the mechanical parameters of the slope stability analysis are determined. 2) according to the limit equilibrium method, the stability analysis of four main landslide sections of D1 slope is carried out in this paper. The safety factors of each slope under the corresponding conditions can be obtained by calculating the control conditions which are divided into three types: lasting working condition, transient working condition and accidental working condition. The results of two-dimensional limit equilibrium calculation show that the slope is stable as a whole, but it is not safe enough under the transient condition. The influence of the material parameters on the stability is analyzed. The sensitivity of material deterioration to slope stability is analyzed, and the sensitivity of earthquake to slope stability is further analyzed. 4) on the basis of the above analysis, the reasonable reinforcement measures are studied, and according to the geological conditions and the preliminary reinforcement scheme, the corresponding calculation model is established, and the slope stability under various load combinations is studied. The effectiveness of the reinforcement scheme and the overall stability of the slope are evaluated, and the stability of the slope during the excavation process is analyzed, which provides the basis for the excavation and supporting measures of the slope.
【學(xué)位授予單位】：西北農(nóng)林科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TV223

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