本文選題：水庫蓄水 + 水巖相互作用��； 參考：《西南交通大學》2014年碩士論文

【摘要】：橫江流域電站蓄水后,庫區(qū)內橋梁受到水位的變化,其穩(wěn)定性將會發(fā)生改變,直接影響到橋梁的穩(wěn)定性和鐵路的運行安全。 本論文在充分集利用已有資料和現場調查的基礎上,查明了橫江流域研究區(qū)的工程地質條件、巖土體結構及物理力學特性,分析了水庫蓄水后水對庫區(qū)橋梁的影響主要是水巖相互作用,具體表現為物理作用、化學作用以及力學作用。接著通過對蓄水對研究區(qū)所有鐵路橋梁安全的影響進行分析總結,得出14座橋梁受到到一定的影響；然后從中選取了三座受影響較大的橋梁,先是通過計算圖解法中的卡丘金方法對庫岸邊坡進行了塌岸預測,結果表明,水庫蓄水后庫岸邊坡受水位的影響將產生不同程度的塌岸；然后通過flac3D數值模擬軟件,對庫岸邊坡在蓄水前和蓄水后兩種狀態(tài)下分別進行穩(wěn)定性模擬分析,計算結果表明,庫岸邊坡在蓄水前的天然狀態(tài)下位移量很小,處于穩(wěn)定狀態(tài)；在蓄水后的狀態(tài)下則處于不穩(wěn)定狀態(tài),位移量較大,可能發(fā)生塌岸現象,對邊坡位置上的橋梁墩臺的穩(wěn)定性產生較大的影響。最后,歸納總結了蓄水引發(fā)的橋梁常見基礎病害類型,主要有基礎沉降、基礎滑動、基礎傾覆、墩臺及樁基礎腐蝕破壞；并通過分析病害的產生條件和機理分析及對橋梁使用性能的影響,提出相應的處治措施建議。
[Abstract]:After the storage of the hydropower station in the Hengjiang River Basin, the bridge in the reservoir area will be changed by the change of water level, and its stability will be changed, which will directly affect the stability of the bridge and the safety of the railway operation. Based on the existing data and field investigation, this paper finds out the engineering geological conditions, rock and soil structure and physical and mechanical properties of the study area of the Hengjiang River Basin. It is analyzed that the influence of water storage on the bridge in the reservoir area is mainly the interaction of water and rock, which is manifested by physical, chemical and mechanical effects. Then through the analysis and summary of the influence of water storage on the safety of all railway bridges in the study area, it is concluded that 14 bridges are affected to a certain extent, and then three more affected bridges are selected. Firstly, the bank collapse is predicted by the Kachujin method, which is used in the graphic method. The results show that the bank slope will collapse to different extent after the reservoir impoundment, and then the flac3D numerical simulation software is used to simulate the collapse of the bank slope, and the results show that the reservoir bank slope will be affected by the water level after the reservoir impoundment. The stability of bank slope is simulated before and after storage. The results show that the displacement of bank slope is small and stable in the natural state before storage. Under the condition of impoundment the stability of bridge pier and abutment in the position of slope is greatly affected by the unstable state and the large displacement which may occur the phenomenon of bank collapse. Finally, the types of bridge foundation diseases caused by impoundment are summarized, including foundation settlement, foundation sliding, foundation overturning, piers and abutments and pile foundation corrosion damage. Based on the analysis of the conditions and mechanism of the disease and the influence on the performance of the bridge, the corresponding treatment measures are put forward.
【學位授予單位】：西南交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U447;TV62

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