本文選題：隧道 + 城區(qū)復(fù)雜環(huán)境�。� 參考：《重慶大學(xué)》2014年碩士論文

【摘要】：重慶東水門大橋·千廝門大橋渝中區(qū)連接隧道設(shè)計(jì)全長715m，根據(jù)現(xiàn)場地勢變化分別采用明、暗挖法修建。隧道圍巖中節(jié)理較為發(fā)育，，周邊建筑物較多且與軌道六號(hào)線近接，工程環(huán)境復(fù)雜。本文以渝中連接隧道為依托，對(duì)隧道小凈距段、暗挖與軌道六號(hào)線交疊段以及明挖與軌道六號(hào)線交疊段的施工力學(xué)效應(yīng)進(jìn)行深入的研究，并結(jié)合監(jiān)控量測資料，有效地指導(dǎo)施工，也可為城區(qū)復(fù)雜工程環(huán)境下節(jié)理巖體隧道設(shè)計(jì)、施工、科研等方面提供借鑒的經(jīng)驗(yàn)。主要工作及研究成果如下： ①在工程地質(zhì)、施工地質(zhì)分析和巖石力學(xué)實(shí)驗(yàn)的基礎(chǔ)上，選取符合工程實(shí)際的圍巖參數(shù)，建立節(jié)理巖體工程力學(xué)模型。 ②針對(duì)小凈距隧道段分別建立三維有限元模型以及二維離散元模型，對(duì)其施工力學(xué)效應(yīng)進(jìn)行分析，詳細(xì)分析了圍巖的位移及應(yīng)力變化特征、隧道的開挖對(duì)建筑物的影響等。在考慮節(jié)理的情況下對(duì)其施工支護(hù)方法進(jìn)行了優(yōu)化。 ②針對(duì)暗挖與軌道六號(hào)線交疊段分別建立三維有限元模型以及二維離散元模型，分析了暗挖段連拱隧道圍巖的位移及應(yīng)力變化特征、隧道開挖對(duì)軌道六號(hào)線以及地表建筑物的影響等。通過與監(jiān)控量測資料的對(duì)比分析，驗(yàn)證了數(shù)值分析結(jié)果的正確性。 ③針對(duì)明挖與軌道六號(hào)線交疊段分別建立三維有限元模型以及二維離散元模型，分析了明挖段開挖對(duì)六號(hào)線以及地表建筑的影響。在考慮節(jié)理情況下模擬了托換樁的施工，得出了托換樁施工對(duì)圍巖和六號(hào)線的影響程度。
[Abstract]:The design of connecting tunnel of Qianshuimen Bridge Yuzhong District of Dongshuimen Bridge in Chongqing is 715m in length. In the surrounding rock of the tunnel, the joints are more developed, the surrounding buildings are more and close to track Line 6, and the engineering environment is complex. Based on the Yuzhong Link Tunnel, this paper makes a deep study on the construction mechanics effects of the small distance section of the tunnel, the overlapping section of the hidden excavation and track line 6 and the overlap section of the open excavation and track line 6, and combines with the monitoring and measuring data. It can also be used for reference in the design, construction and scientific research of jointed rock mass tunnels under complex engineering environment in urban areas. The main work and research results are as follows: 1 on the basis of engineering geology, construction geological analysis and rock mechanics experiments, the parameters of surrounding rock which accord with the engineering practice are selected. The engineering mechanics model of jointed rock mass is established. (2) the three-dimensional finite element model and the two-dimensional discrete element model are established for the small net distance tunnel section respectively, and the construction mechanics effect is analyzed. The variation characteristics of displacement and stress of surrounding rock and the influence of tunnel excavation on buildings are analyzed in detail. Under the condition of considering joints, the construction support method is optimized. (2) the 3D finite element model and the two-dimensional discrete element model are established for the intersection section of the hidden excavation and track line 6, respectively. The variation characteristics of displacement and stress in the surrounding rock of the double-arch tunnel in underground excavation section and the influence of tunnel excavation on track No. 6 and surface buildings are analyzed. The correctness of the numerical analysis results is verified by comparing the data with the monitoring data. (3) the 3D finite element model and the two-dimensional discrete element model are established for the intersection section of the open excavation and track line 6, respectively. The influence of the excavation of the open excavation section on the sixth line and the surface buildings is analyzed. Under the consideration of joints, the construction of underpinning pile is simulated, and the influence of underpinning pile construction on surrounding rock and No. 6 line is obtained.
【學(xué)位授予單位】：重慶大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U451;U455.49

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