【摘要】：近年來,我國經(jīng)濟的騰飛伴隨著交通行業(yè)的發(fā)展,隧道同樣也得到廣泛的利用,其方便快捷,節(jié)約時間成本,環(huán)境破壞小,因此隧道扮演著越來越重要的角色。然而,隨著運營時間的不斷推長,隧道的病害也愈加明顯,成為當前隧道工程中不可忽視的問題。由于隧道的地質(zhì)條件、氣候因素、設計質(zhì)量、管理方式、運營狀況的影響,致使越來越的隧道出現(xiàn)襯砌裂縫、混凝土塌落、鋼筋嚴重銹蝕、隧道漏水等問題。因此對隧道裂縫出現(xiàn)的原因進行分析和治理是隧道工程中一個重要研究點。隧道二次襯砌裂縫嚴重危害隧道安全運營,對隧道二次襯砌進行拆除并重新施作是目前治理該問題的一種主要手段。本文對依托工程進行了現(xiàn)場調(diào)查并探索了襯砌開裂原因,計算了二次襯砌的拆除進尺和拆除順序,同時計算了爆破拆除時的炸藥量,具體成果如下：(1)本文針對古牛坡隧道裂縫進行了現(xiàn)場調(diào)查,并統(tǒng)計了裂縫類型、深度、寬度、長度及走向,結(jié)合隧址區(qū)的地質(zhì)資料和隧道設計資料,對裂縫產(chǎn)生的原因進行了分析,初步得出隧道裂縫產(chǎn)生的原因。(2)利用通用有限元軟件ANSYS對古牛坡隧道二次襯砌的拆除進行了數(shù)值分析,依據(jù)以往工程經(jīng)驗,選取了2m、3m、4m、6m四種常見拆除進尺和先拱頂后拱腰及先拱腰后拱頂兩種常見的拆除順序進行討論研究,從而得出較合理的拆除進尺和拆除順序。(3)利用ANSYS/LS-DYNA軟件建立隧道二次襯砌爆破拆除模型,并選取了四種常見裝藥量對隧道襯砌爆破拆除進行模擬分析,根據(jù)計算的位移應力進行綜合分析,得到合理的裝藥量。
[Abstract]:In recent years, with the development of transportation industry, tunnel is also widely used, which is convenient and fast, saves time and cost, and has little environmental damage, so tunnel plays a more and more important role. However, with the continuous extension of operation time, tunnel diseases become more and more obvious, which can not be ignored in current tunnel engineering. Due to the influence of geological conditions, climate factors, design quality, management mode and operation conditions, more and more tunnel appear lining cracks, concrete collapse, serious corrosion of reinforcement, tunnel leakage and so on. Therefore, the analysis and treatment of tunnel cracks is an important research point in tunnel engineering. The second lining crack of tunnel seriously endangers the safe operation of tunnel. It is one of the main measures to solve this problem to demolish and reapply the secondary lining of tunnel. In this paper, the field investigation of the supporting project is carried out and the reasons for the lining cracking are explored. The demolition advance and the demolition sequence of the secondary lining are calculated, and the explosive quantity during the blasting demolition is calculated at the same time. The specific results are as follows: (1) the field investigation of the cracks in GuNiupo tunnel is carried out, and the types, depth, width, length and direction of the cracks are counted, combined with the geological data and tunnel design data in the tunnel area. The causes of cracks are analyzed, and the causes of tunnel cracks are preliminarily obtained. (2) the demolition of secondary lining of GuNiupo tunnel is numerically analyzed by using the universal finite element software ANSYS. According to the previous engineering experience, 2 ms is selected. This paper discusses and studies the removal sequence of four kinds of common removal ruler, first arch and then arch waist, and first arch waist and then arch top, respectively, which are 3 m, 4 m, 6 m, 3 m, 4 m and 6 m, respectively. Thus a reasonable demolition scale and demolition sequence are obtained. (3) the model of tunnel secondary lining blasting demolition is established by using ANSYS/LS-DYNA software, and four kinds of common charge quantity are selected to simulate the tunnel lining blasting demolition. According to the calculated displacement stress, the reasonable charge quantity is obtained.
【學位授予單位】：重慶交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U457

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相關期刊論文 前1條

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本文編號：2378334