本文關(guān)鍵詞：高性能復(fù)合砂漿鋼筋網(wǎng)加固隧道試驗(yàn)研究　出處：《安徽理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 盾構(gòu)隧道 襯砌結(jié)構(gòu) 三維模型 加固效果

【摘要】：城市地下軌道交通正如火如荼的建設(shè)中,盾構(gòu)法是開挖隧道主要使用的施工技術(shù)方法。地鐵隧道工程的推進(jìn),地下空間得到有效利用,地面交通壓力得到很好的緩解。由于隧道所處的地下環(huán)境比較復(fù)雜,受到外部影響大,容易引發(fā)襯砌結(jié)構(gòu)病害的出現(xiàn),給地鐵運(yùn)營帶來安全隱患。因此,針對襯砌結(jié)構(gòu)修復(fù)問題具有重要研究意義。目前,盾構(gòu)隧道主要采用鋼環(huán)加固與粘貼纖維布加固,但受到材料本身性能條件限制,兩種加固方法仍然存在一些問題。為此,本文提出高性能復(fù)合砂漿鋼筋網(wǎng)加固盾構(gòu)隧道方法,通過數(shù)值模擬試驗(yàn),對這種加固方法作初步的探討。本文依托管片加固工程案例,利用ABAQUS有限元軟件相關(guān)功能和特點(diǎn),對盾構(gòu)隧道襯砌結(jié)構(gòu)作三維數(shù)值試驗(yàn)分析。在襯砌結(jié)構(gòu)受力和變形的特征基礎(chǔ)上,選用幾組典型工況進(jìn)行數(shù)值模擬計(jì)算,并對比分析加固與未加固狀態(tài)下襯砌結(jié)構(gòu)計(jì)算結(jié)果,從而評價(jià)高性能復(fù)合砂漿鋼筋網(wǎng)加固效果。本文主要工作如下:(1)簡單總結(jié)了盾構(gòu)隧道結(jié)構(gòu)特性,隧道病害問題及治理措施,根據(jù)本文的研究背景,提出高性能復(fù)合砂漿鋼筋網(wǎng)加固襯砌結(jié)構(gòu)的研究內(nèi)容和研究方法,為下一步研究工作奠定基礎(chǔ)。(2)根據(jù)地鐵隧道加固工程背景,利用ABAQUS軟件相關(guān)功能,進(jìn)行數(shù)值模擬試驗(yàn)。首先建立襯砌結(jié)構(gòu)的三維模型,設(shè)置材料參數(shù)、接觸屬性以及邊界條件等,為下一步計(jì)算工作提供模型基礎(chǔ)。(3)基于研究需要,選定幾組典型工況進(jìn)行計(jì)算,根據(jù)數(shù)值計(jì)算結(jié)果對比分析加固與未加固狀態(tài)下襯砌結(jié)構(gòu)受力特征和變形規(guī)律,得到管片橢圓度與螺栓、鋼筋受力狀態(tài)之間對應(yīng)的量化關(guān)系以及橢圓度控制特征。(4)通過工程實(shí)例,對管片病害問題提出加固方案,給出施工質(zhì)量控制與檢驗(yàn)要求,最后詳細(xì)介紹了施工工藝。
[Abstract]:The construction of city underground rail traffic is like a raging fire in the shield construction technology is mainly used methods of tunnel excavation. The subway tunnel project to promote the effective use of underground space, traffic pressure on the ground to get good relief. Because the tunnel underground environment is complex, due to the external impact, easily lead to diseases of lining structure the security risks to the subway operation. Therefore, the lining repair problem has important research significance. At present, the shield tunnel mainly adopts steel ring reinforcement with FRP, but by the performance of the material itself conditions, two kinds of reinforcement methods still exist some problems. Therefore, this method of high performance composite reinforcement of shield tunnel mortar steel mesh, through numerical simulation tests on the preliminary discussion. This strengthening method based on segment reinforcement engineering cases, the use of ABA QUS finite element software related functions and features, analysis of 3D numerical test of shield tunnel lining structure. The deformation and stress characteristics of lining structure in the foundation, choose several typical conditions by numerical simulation calculation and comparative analysis of the reinforcement and lining structure under the condition of no reinforcement calculation results, to evaluate the high performance ferrocement effect of reinforcement. The main work is as follows: (1) briefly summarizes the characteristics of shield tunnel structure, the problem of tunnel disease and control measures, according to the research background, the research contents and methods of lining structure strengthened with high performance ferrocement, lay the foundation for the next research work. (2) according to the subway tunnel strengthening the engineering background, using the ABAQUS software function, the numerical simulation experiments are conducted. Firstly, establish the three-dimensional model of lining structure, setting the parameters of the material properties and boundary conditions of contact So, to provide a model for the calculation of the next step. (3) based on the needs of research, selected several typical working conditions were analyzed and computed, based on the analysis of reinforcement and reinforcement of lining structure under the condition of no stress characteristics and deformation law of comparative numerical results, obtained the segment ellipticity and bolt reinforcement force corresponding to the quantitative relationship between state and the ellipticity control characteristics. (4) through engineering examples, put forward improvement schemes on segment disease problems, quality control and inspection of construction requirements, the final details of the construction process.

【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：U456

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