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

【摘要】：橫江流域電站蓄水后,庫(kù)區(qū)內(nèi)橋梁受到水位的變化,其穩(wěn)定性將會(huì)發(fā)生改變,直接影響到橋梁的穩(wěn)定性和鐵路的運(yùn)行安全。 本論文在充分集利用已有資料和現(xiàn)場(chǎng)調(diào)查的基礎(chǔ)上,查明了橫江流域研究區(qū)的工程地質(zhì)條件、巖土體結(jié)構(gòu)及物理力學(xué)特性,分析了水庫(kù)蓄水后水對(duì)庫(kù)區(qū)橋梁的影響主要是水巖相互作用,具體表現(xiàn)為物理作用、化學(xué)作用以及力學(xué)作用。接著通過(guò)對(duì)蓄水對(duì)研究區(qū)所有鐵路橋梁安全的影響進(jìn)行分析總結(jié),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(guò)計(jì)算圖解法中的卡丘金方法對(duì)庫(kù)岸邊坡進(jìn)行了塌岸預(yù)測(cè),結(jié)果表明,水庫(kù)蓄水后庫(kù)岸邊坡受水位的影響將產(chǎn)生不同程度的塌岸；然后通過(guò)flac3D數(shù)值模擬軟件,對(duì)庫(kù)岸邊坡在蓄水前和蓄水后兩種狀態(tài)下分別進(jìn)行穩(wěn)定性模擬分析,計(jì)算結(jié)果表明,庫(kù)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(xiàn)象,對(duì)邊坡位置上的橋梁墩臺(tái)的穩(wěn)定性產(chǎn)生較大的影響。最后,歸納總結(jié)了蓄水引發(fā)的橋梁常見(jiàn)基礎(chǔ)病害類型,主要有基礎(chǔ)沉降、基礎(chǔ)滑動(dòng)、基礎(chǔ)傾覆、墩臺(tái)及樁基礎(chǔ)腐蝕破壞；并通過(guò)分析病害的產(chǎn)生條件和機(jī)理分析及對(duì)橋梁使用性能的影響,提出相應(yīng)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(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U447;TV62

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