本文關(guān)鍵詞： 蘇州地鐵 盾構(gòu)施工 臨近建筑物 數(shù)值模擬 控制措施　出處：《蘇州科技學(xué)院》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：盾構(gòu)法憑其眾多的優(yōu)點,在城市地鐵隧道建設(shè)中被運(yùn)用的越來越廣泛,在許多場合已成為首選甚至唯一的方法。然而隧道盾構(gòu)施工將不可避免地對地表及其周邊建筑物產(chǎn)生不利影響,城市地鐵又由于所處環(huán)境的特殊性,盾構(gòu)施工所引起的地表沉降及其對鄰近建筑物的危害作用已不容忽視,如何減少盾構(gòu)施工產(chǎn)生的不利影響,值得進(jìn)行深入的理論研究和技術(shù)開發(fā)。在此背景下,本文以蘇州地鐵四號線蘇錦村站至觀前街站區(qū)間工程為背景,以實測數(shù)據(jù)為依據(jù),通過大型有限元軟件ABAQUS建立三維彈塑性模型,對盾構(gòu)開挖穿越建筑物過程進(jìn)行動態(tài)模擬,進(jìn)而對隧道盾構(gòu)施工引起的地表變形及建筑物變形進(jìn)行研究分析。本文主要完成以下幾部分工作:(1)總結(jié)前人的研究現(xiàn)狀,提出本論文的研究意義。分析了盾構(gòu)施工的主要力學(xué)過程,介紹了ABAQUS有限元軟件及隧道盾構(gòu)開挖如何在ABAQUS中的實現(xiàn)等。(2)以五層鋼筋混凝土框架結(jié)構(gòu)為研究對象,采用ABAQUS建立起隧道-土體-建筑物共同作用的模型,將模擬結(jié)果與實測數(shù)據(jù)進(jìn)行對比分析,并進(jìn)一步對地表變形、結(jié)構(gòu)變形及結(jié)構(gòu)應(yīng)力進(jìn)行研究分析。(3)建立無建筑物的模型,分析土倉壓力及注漿液長期強(qiáng)度對地表沉降的影響。(4)建立建筑物與隧道軸線成不同距離及相交成不同角度的模型,得到:建筑的自身剛度約束了地表及建筑物的變形;隨著相互夾角的增加,建筑基礎(chǔ)傾斜由開始的以縱向傾斜為主轉(zhuǎn)變?yōu)橐詸M向傾斜為主。(5)比較有無隔離墻兩種模型,研究盾構(gòu)施工中隔離墻的加固效果,結(jié)論:隔離墻的存在,建筑物水平位移減少了約55%,豎向沉降位移減少了60%左右。最后,總結(jié)了本文的主要研究成果并對隧道盾構(gòu)這一課題進(jìn)行了展望。
[Abstract]:With its many advantages, shield method has been used more and more widely in urban subway tunnel construction. In many cases, it has become the first or the only method. However, the tunnel shield construction will inevitably have a negative impact on the surface and surrounding buildings, and the city subway due to the particularity of the environment. The ground subsidence caused by shield construction and its harm to adjacent buildings can not be ignored. How to reduce the adverse effects of shield construction is worth in-depth theoretical research and technical development. Based on the project between Sujin Village Station and Guanqian Street Station of Suzhou Metro Line 4, based on the measured data, a three-dimensional elastic-plastic model is established by using a large-scale finite element software ABAQUS. The dynamic simulation of shield tunneling through buildings is carried out. Then the ground deformation and building deformation caused by shield tunneling construction are studied and analyzed. This paper mainly completes the following parts of work: 1) summarizes the previous research status. The research significance of this paper is put forward. The main mechanical process of shield construction is analyzed. The ABAQUS finite element software and how to realize the tunnel shield excavation in ABAQUS are introduced. The five-story reinforced concrete frame structure is taken as the research object. The model of tunnel-soil-building interaction is established by using ABAQUS. The simulation results are compared with the measured data, and the surface deformation is further analyzed. The deformation and stress of the structure are studied and analyzed. (3) the model without building is established. The influence of soil pressure and grouting fluid long-term strength on surface subsidence is analyzed. (4) A model of building and tunnel axis at different distances and at different angles is established. The following conclusions are obtained: the stiffness of the building restricts the deformation of the surface and the building; With the increase of the angle between the two sides, the slope of the foundation changes from longitudinal to transverse.) there are two kinds of separation wall models, and the reinforcement effect of the wall in shield construction is studied. Conclusion: with the existence of the wall, the horizontal displacement of the building is reduced by about 55 and the vertical settlement displacement is reduced by about 60%. The main research results of this paper are summarized and the project of shield tunneling is prospected.
【學(xué)位授予單位】：蘇州科技學(xué)院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U455.43;TU433

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本文編號：1471120