【摘要】：目前針對(duì)合肥市區(qū)地質(zhì)條件及周邊環(huán)境的地鐵隧道盾構(gòu)施工,暫無(wú)相應(yīng)成熟工程經(jīng)驗(yàn)借鑒。鑒于此,本論文選取合肥軌道交通1號(hào)線盾構(gòu)施工過(guò)程中的兩個(gè)典型工況,即下穿南—環(huán)城市隧道及下穿南淝河,開(kāi)展地鐵盾構(gòu)施工過(guò)程的動(dòng)態(tài)數(shù)值仿真分析。研究了施工過(guò)程中地表變形及地層變形受力情況,運(yùn)用破壞接近度指標(biāo)評(píng)價(jià)隧道周圍區(qū)域巖土體的穩(wěn)定性程度,研究典型工況下合肥地鐵盾構(gòu)施工的安全問(wèn)題,對(duì)以后合肥地區(qū)的地鐵盾構(gòu)施工具有一定的理論和工程指導(dǎo)價(jià)值。本文主要完成的工作有：(1)通過(guò)查閱大量國(guó)內(nèi)外文獻(xiàn),總結(jié)了國(guó)內(nèi)外學(xué)者在盾構(gòu)施工方面的研究成果,根據(jù)研究的背景及目的,闡述了本文的主要研究?jī)?nèi)容；(2)簡(jiǎn)要地介紹了盾構(gòu)施工引起地層變形、流固耦合等基本理論,并且引入了破壞接近度指標(biāo),介紹了相關(guān)基本理論;(3)針對(duì)盾構(gòu)下穿南一環(huán)既有城市隧道施工存在的安全風(fēng)險(xiǎn),運(yùn)用FLAC3D實(shí)現(xiàn)了隧道盾構(gòu)開(kāi)挖的模擬,分析了盾構(gòu)推進(jìn)過(guò)程中既有城市隧道結(jié)構(gòu)以及在建隧道應(yīng)力應(yīng)變分布規(guī)律；(4)針對(duì)盾構(gòu)下穿南淝河施工存在的安全風(fēng)險(xiǎn),運(yùn)用FLAC3D進(jìn)行了隧道盾構(gòu)下穿河流開(kāi)挖過(guò)程的模擬,對(duì)比分析了相同條件下的流固耦合和彈塑性計(jì)算結(jié)果,闡述了水的滲流影響在盾構(gòu)下穿河流施工穩(wěn)定性分析中是必須考慮的因素；(5)基于破壞接近度對(duì)盾構(gòu)隧道開(kāi)挖過(guò)程中隧道周邊巖土體穩(wěn)定性進(jìn)行分析。通過(guò)破壞接近度指標(biāo)可以正確評(píng)價(jià)隧道周圍各區(qū)域巖土體的穩(wěn)定性程度,破壞接近度分布及演化規(guī)律對(duì)研究施工中應(yīng)采取的預(yù)防措施具有重要的指導(dǎo)意義。
[Abstract]:At present, there is no relevant mature engineering experience for shield tunneling construction of metro tunnel in accordance with the geological conditions and surrounding environment in Hefei. In view of this, this paper selects two typical working conditions of shield tunneling in Hefei Rail Transit Line 1, that is, through the Nanhuan City Tunnel and the Nanfeihe River, to carry out the dynamic numerical simulation analysis of the subway shield construction process. The ground deformation and ground deformation during construction are studied, the stability of rock and soil around the tunnel is evaluated by using the damage proximity index, and the safety problems of shield construction in Hefei metro under typical working conditions are studied. It has certain theoretical and engineering guiding value for the shield tunneling construction in Hefei area. The main works of this paper are as follows: (1) through consulting a large number of domestic and foreign literature, summarized the domestic and foreign scholars in shield construction research results, according to the background and purpose of the study, elaborated the main research content of this paper; (2) the basic theories of ground deformation and fluid-solid coupling caused by shield tunneling are briefly introduced, and the damage proximity index is introduced, and the relevant basic theories are introduced. (3) in view of the safety risks existing in the construction of existing urban tunnels under shield tunneling, The simulation of shield excavation is realized by FLAC3D, and the distribution of stress and strain in the existing city tunnel structure and the tunnel under construction are analyzed. (4) the safety risk of tunneling through Nanfeihe River under shield tunneling is analyzed. FLAC3D is used to simulate the excavation process of river under shield tunneling, and the results of fluid-solid coupling and elastic-plastic calculation under the same conditions are compared and analyzed. The influence of water seepage on the stability analysis of river under shield tunneling is discussed. (5) the stability of surrounding rock and soil in shield tunnel excavation is analyzed based on the degree of damage proximity. The stability degree of rock and soil around the tunnel can be correctly evaluated by the damage proximity index. The distribution of failure proximity and the law of evolution have important guiding significance for the study of preventive measures to be taken in construction.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：U455.43;U231.3

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 顏治國(guó);劉殿書;江玉生;;淺覆地層盾構(gòu)隧道下穿永寧門護(hù)城河的施工方案研究[J];西安科技大學(xué)學(xué)報(bào);2012年05期

2 彭立敏;丁祖德;黃娟;雷明鋒;孫歡歡;;隧道穿越方式對(duì)地表建筑物變形影響的數(shù)值分析[J];中南大學(xué)學(xué)報(bào)(自然科學(xué)版);2012年01期

3 葛世平;謝東武;丁文其;楊洪杰;;盾構(gòu)穿越保護(hù)建筑數(shù)值模擬預(yù)測(cè)與監(jiān)控量測(cè)[J];同濟(jì)大學(xué)學(xué)報(bào)(自然科學(xué)版);2011年10期

4 陳越峰;張慶賀;季凱;呂濤;;盾構(gòu)下穿越施工對(duì)已建隧道沉降的影響[J];地下空間與工程學(xué)報(bào);2011年S1期

5 紀(jì)佑軍;劉建軍;程林松;;考慮流-固耦合的隧道開(kāi)挖數(shù)值模擬[J];巖土力學(xué);2011年04期

6 張玉軍;張維慶;;考慮裂隙的幾何-力學(xué)特性的雙重孔隙介質(zhì)水-應(yīng)力耦合模型及其有限元分析[J];水利學(xué)報(bào);2009年12期

7 張建剛;何川;;高水壓大斷面盾構(gòu)隧道管片襯砌結(jié)構(gòu)靜力學(xué)行為模型試驗(yàn)研究[J];水文地質(zhì)工程地質(zhì);2009年04期

8 原華;張慶賀;胡向東;李攀;;大直徑越江盾構(gòu)隧道各向異性滲流應(yīng)力耦合分析[J];巖石力學(xué)與工程學(xué)報(bào);2008年10期

9 張黎明;李鵬;孫林娜;王在泉;;考慮地下水滲流影響的襯砌隧洞彈塑性分析[J];長(zhǎng)江科學(xué)院院報(bào);2008年05期

10 李昀;張子新;;泥漿滲透對(duì)盾構(gòu)開(kāi)挖面穩(wěn)定性的影響研究[J];地下空間與工程學(xué)報(bào);2007年04期

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