發(fā)布時間：2018-06-26 09:41

  本文選題：水庫蓄水 + 隧道安全��； 參考：《西南交通大學》2014年碩士論文

【摘要】：隧道是賦存于天然介質(zhì)中的人工地下結(jié)構(gòu),受到外部環(huán)境因素的影響,隧道在后期運營過程中出現(xiàn)病害,如翻漿冒泡和襯砌破壞等。水庫蓄水導致了庫岸隧道水文地質(zhì)環(huán)境的改變,在某些條件下會對隧道運營安全產(chǎn)生影響。本文依托橫江梯級電站水庫蓄水對內(nèi)昆鐵路安全影響的評估、防治工程設計項目,結(jié)合巖體力學、結(jié)構(gòu)力學、水文地質(zhì)、工程地質(zhì)、土力學等多學科進行綜合分析,對水庫蓄水后對隧道安全的影響進行了系統(tǒng)評價。 調(diào)查研究了橫江流域區(qū)域地質(zhì)環(huán)境和各梯級電站工程地質(zhì)條件,分析了水庫蓄水后水文地質(zhì)變化特征、隧道圍巖對水的敏感性及水巖相互作用。 結(jié)合內(nèi)昆線各隧道勘察設計資料、庫區(qū)正常蓄水位及現(xiàn)場踏勘資料,評價了水庫蓄水對各個隧道的安全影響,剔除水庫蓄水后無影響或影響不大的隧道,篩選出有較大影響的4座隧道。 以麻石山隧道為例進行隧道安全性數(shù)值模擬。通過研究水庫蓄水前和蓄水后隧道二次襯砌內(nèi)力和安全系數(shù)的升降變化幅度,分析了水庫蓄水對麻石山隧道安全性的具體影響,為隧道結(jié)構(gòu)加固或庫岸防護提供了依據(jù)。 歸納總結(jié)了水庫蓄水導致的各種工程地質(zhì)問題,提出了隧道病害的分類,初步研究了水庫蓄水誘發(fā)的隧道病害的機理,對隧道病害提出了相應的工程措施。
[Abstract]:Tunnel is an artificial underground structure existing in natural medium, which is affected by external environmental factors. During the later operation of tunnel, there are diseases, such as slurry bubbling and lining damage. The reservoir impoundment results in the change of the hydrogeological environment of the reservoir bank tunnel, which will affect the safety of the tunnel operation under some conditions. Based on the evaluation of the impact of reservoir water storage on the safety of Nei-Kun Railway in Hengjiang Cascade Hydropower Station, the design project of prevention and control engineering, combined with rock mechanics, structural mechanics, hydrogeology, engineering geology, soil mechanics and so on, is comprehensively analyzed. The influence of reservoir water storage on tunnel safety is systematically evaluated. The regional geological environment of Hengjiang River basin and the engineering geological conditions of each cascade power station are investigated and studied. The characteristics of hydrogeological changes after reservoir storage, the sensitivity of tunnel surrounding rock to water and the interaction between water and rock are analyzed. Combined with the survey and design data of each tunnel in Nei-Kun Line, the normal water level of reservoir area and the site survey data, the safety effect of reservoir water storage on each tunnel is evaluated, and the tunnels without any or no influence after reservoir impoundment are excluded. Four tunnels with great influence were screened out. The numerical simulation of tunnel safety is carried out with Maishishan tunnel as an example. By studying the variation range of the secondary lining internal force and safety factor before and after the reservoir impoundment, the concrete influence of reservoir water storage on the safety of Mashishan tunnel is analyzed, which provides the basis for the reinforcement of tunnel structure or the protection of reservoir bank. Various engineering geological problems caused by reservoir impoundment are summarized, the classification of tunnel diseases is put forward, the mechanism of tunnel diseases induced by reservoir impoundment is preliminarily studied, and the corresponding engineering measures for tunnel diseases 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】：TV697;U458

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本文編號：2069955