本文選題：砂泥巖　切入點：緩傾順層邊坡　出處：《北京交通大學》2014年碩士論文　論文類型：學位論文

【摘要】：隨著國家西部開發(fā)戰(zhàn)略的實施,人類的工程活動導致了大規(guī)模的山體滑坡,不僅嚴重危及人民的生命安全,也造成了大量的經(jīng)濟損失。砂泥巖緩傾順層邊坡穩(wěn)定性與加固支護效果評價問題一直是我國西南山區(qū)邊坡的重點研究課題,其研究問題涉及鐵路、公路、水電、采礦和建筑等工程行業(yè)。長期以來,國內(nèi)外廣大學者對邊坡病害體穩(wěn)定性、加固效果分析評價的研究形成了一系列比較成熟的理論和方法,但針對具體工程項目開展砂泥巖緩傾順層邊坡的失穩(wěn)破壞、加固后可靠程度等相關(guān)問題的研究則相對較少,所以有必要對砂泥巖緩傾順層邊坡的失穩(wěn)破壞機理、穩(wěn)定性、加固效果分析評價等問題進行深入研究。 本文基于中交股份山嶺區(qū)資源節(jié)約型高速公路建設(shè)關(guān)鍵技術(shù)研究項目,結(jié)合麻辣溪砂泥巖緩傾順層邊坡(K27+265右側(cè)邊坡)的開挖支護過程,開展砂泥巖緩傾順層邊坡的現(xiàn)場監(jiān)測、穩(wěn)定性分析、加固支護效果評價方面的研究。按照查閱資料一現(xiàn)場實地調(diào)查一監(jiān)測數(shù)據(jù)分析一建立模型一數(shù)值分析一支護效果評價的研究思路：首先查閱砂泥巖緩傾順層邊坡的相關(guān)文獻資料,明確砂泥巖緩傾順層邊坡的研究現(xiàn)狀；在已有邊坡分析資料的基礎(chǔ)上,論述麻辣溪邊坡的區(qū)域工程地質(zhì)條件、邊坡所處的地理環(huán)境、周邊發(fā)生邊坡破壞的變形機制等問題；以現(xiàn)場測試采集的水位、地表位移、土壓力、錨索應(yīng)力、深部巖土體位移等試驗數(shù)據(jù)為依據(jù),分析邊坡發(fā)展趨勢；應(yīng)用工程地質(zhì)學、彈塑性力學、巖石力學、數(shù)值分析等專業(yè)知識綜合研究邊坡變形,應(yīng)力發(fā)展狀況；針對邊坡的穩(wěn)定性利用剛體極限平衡法和PLAXIS數(shù)值模擬技術(shù)基于摩爾庫倫破壞準則全方位認識邊坡整體變形發(fā)展進程。在有限元計算中,采用12節(jié)點單元模型,基于摩爾庫倫準則分析天然狀態(tài)、一次性開挖狀態(tài)、錨索框架支護狀態(tài)三種工況,得出邊坡土體位移,應(yīng)力,安全系數(shù)的變化規(guī)律,參照現(xiàn)場監(jiān)測數(shù)據(jù),分析數(shù)值計算結(jié)果；最后結(jié)合邊坡加固措施,對加固支護效果從適宜性、技術(shù)狀況、整體作用安全狀況進行評價預測,分析邊坡支護等級和加固狀態(tài),并且預測邊坡未來的變化趨勢。
[Abstract]:With the implementation of the national strategy for the development of the western region, human engineering activities have led to large-scale landslides, which not only seriously endanger the safety of people's lives, The evaluation of slope stability and reinforcement and support effect of sand and mudstone gently inclined bedding slope has always been a key research topic in the southwest mountain slope of China, and the research problems involve railway, highway, hydropower, etc. For a long time, many scholars at home and abroad have developed a series of mature theories and methods for the analysis and evaluation of slope disease body stability and reinforcement effect. However, for the specific project, there are few researches on the instability failure of sand and mudstone gently inclined bedding slope, and the relative problems such as the reliability degree after reinforcement are relatively few, so it is necessary to study the failure mechanism and stability of the sand mudstone gentle dip bedding slope. The analysis and evaluation of reinforcement effect are studied in depth. Based on the key technology research project of resource-conserving expressway construction in Zhongjiaojiaojiaojiaojiaojiaoshanling district, combined with the excavation and support process of the slope of gently inclined bedding slope K27265 in Malaixi sand and mudstone, To carry out on-site monitoring and stability analysis of gently inclined bedding slopes of sand and mudstone, Research on the evaluation of reinforcement and support effect. According to the reference data-site investigation-monitoring data analysis-model-numerical analysis-support effect evaluation thought: first, refer to the slope of sand and mudstone gentle sloping bedding. And related literature, Based on the existing slope analysis data, this paper discusses the regional engineering geological conditions of the slope, the geographical environment of the slope, the deformation mechanism of the surrounding slope, and so on. Based on the field test data of water level, surface displacement, earth pressure, anchor cable stress, displacement of deep rock and soil, the development trend of slope is analyzed, and the engineering geology, elastoplastic mechanics, rock mechanics, etc. Numerical analysis and other professional knowledge to study the slope deformation, stress development; Based on the Moore Coulomb failure criterion and rigid body limit equilibrium method and PLAXIS numerical simulation technique, the overall deformation development process of slope is fully understood. In the finite element method, a 12-node element model is used. Based on the Mohr Coulomb criterion, the natural state, the one-off excavation state and the anchor cable frame support state are analyzed. The variation rules of the displacement, stress and safety factor of the slope soil are obtained, and the numerical calculation results are analyzed with reference to the field monitoring data. Finally, combined with slope reinforcement measures, the effect of reinforcement and support is evaluated and forecasted from suitability, technical condition and overall action safety condition, and the grade and state of slope support are analyzed, and the trend of slope change in the future is predicted.
【學位授予單位】：北京交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TU45;P642.2

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