本文選題：盾構隧道 + 地表變形��； 參考：《西安科技大學》2017年碩士論文

【摘要】：本文以廈門地鐵1號線園博苑站～杏錦路站區(qū)間隧道盾構側穿杏林北環(huán)高架橋工程為依托,采用理論分析、數(shù)值模擬和現(xiàn)場監(jiān)測相結合的方法開展論文的研究工作,并提出相應的橋樁基礎變形防控技術方案。(1)在原有理論基礎上,分析了各類因素對地鐵隧道施工引起地層變形的影響。研究表明,地鐵盾構施工引起的地層位移,主要有水平位移和豎向位移,地層不同方向的位移變形,使鄰近橋樁基礎產(chǎn)生不同形式的變形�？偨Y歸出納了盾構隧道下穿工程中常用的防控措施,同時提出了園博苑站～杏錦路站區(qū)間地鐵側穿工程中地層和橋樁的變形防控標準。(2)運用Midas GTS軟件,分析地鐵盾構施工引起既有橋樁變形的影響規(guī)律。模擬分析袖閥管注漿防護效果。模擬結果表明,袖閥管注漿加固措施下的地層沉降和橋樁變形都明顯減小,袖閥管注漿防護效果明顯。分別模擬采用17.7m、20.7m、23.7m三種長度袖閥管對土層進行注漿加固,對比分析鄰近橋樁變形情況,并進行防護參數(shù)比選。綜合對比各種因素分析得出23.7m長度袖閥管注漿加固更為合理。(3)結合工程實際,制定現(xiàn)場防控監(jiān)測方案,對比分析模擬預測和現(xiàn)場監(jiān)測結果。研究表明,模擬預測的地表沉降和現(xiàn)場實測地表沉降曲線趨勢基本一致,袖閥管注漿加固地層后,地表沉降和鄰近的杏林北環(huán)高架橋橋樁變形都控制在允許范圍內(nèi),確保了地鐵盾構施工期間橋梁的安全運營。
[Abstract]:Based on Xiamen Metro Line 1 Yuanyuan Station ~ Xingjin Road Station Tunnel Shield tunneling through Xinglin North Ring Viaduct Project, this paper uses the methods of theoretical analysis, numerical simulation and field monitoring to carry out the research work. Based on the original theory, the influence of various factors on ground deformation caused by subway tunnel construction is analyzed. The study shows that the ground displacement caused by shield tunneling mainly includes horizontal displacement and vertical displacement, and the displacement deformation in different directions of the stratum, which results in different forms of deformation of the adjacent bridge pile foundation. This paper summarizes the common prevention and control measures used in the shield tunnel underpass project, and puts forward the deformation prevention and control standard of stratum and bridge pile in the subway side piercing project between Yuanyuan station and Xingjin road station. 2) using Midas GTS software. The influence law of existing bridge pile deformation caused by shield construction of subway is analyzed. Simulation analysis of sleeve valve pipe grouting protection effect. The simulation results show that the ground settlement and bridge pile deformation are obviously reduced and the effect of sleeve valve pipe grouting protection is obvious. Three kinds of sleeve valve tubes with length of 17.7 m ~ 20.7 m ~ (23. 7m) were used to reinforce the soil layer respectively. The deformation of adjacent bridge piles was analyzed and the protection parameters were compared and selected. Through comprehensive analysis of various factors, it is concluded that the grouting reinforcement of 23.7m length sleeve valve pipe is more reasonable. Combined with the engineering practice, the on-site prevention and control monitoring scheme is formulated, and the simulation prediction and field monitoring results are compared and analyzed. The results show that the predicted surface settlement is basically consistent with the field measured surface settlement curve, and the deformation of the ground surface settlement and adjacent Xinglin North Ring Viaduct pile is controlled within the allowable range after grouting with sleeve valve pipe to reinforce the ground. Ensure the safe operation of the bridge during the shield construction of subway.
【學位授予單位】：西安科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：U443.15;U455.43;U231.3

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本文編號：1916924