隧道盾构施工对邻近建筑物的影响研究

发布时间：2018-01-28 17:33

本文关键词： 苏州地铁盾构施工临近建筑物数值模拟控制措施　出处：《苏州科技学院》2015年硕士论文　论文类型：学位论文

【摘要】：盾构法凭其众多的优点,在城市地铁隧道建设中被运用的越来越广泛,在许多场合已成为首选甚至唯一的方法。然而隧道盾构施工将不可避免地对地表及其周边建筑物产生不利影响,城市地铁又由于所处环境的特殊性,盾构施工所引起的地表沉降及其对邻近建筑物的危害作用已不容忽视,如何减少盾构施工产生的不利影响,值得进行深入的理论研究和技术开发。在此背景下,本文以苏州地铁四号线苏锦村站至观前街站区间工程为背景,以实测数据为依据,通过大型有限元软件ABAQUS建立三维弹塑性模型,对盾构开挖穿越建筑物过程进行动态模拟,进而对隧道盾构施工引起的地表变形及建筑物变形进行研究分析。本文主要完成以下几部分工作:(1)总结前人的研究现状,提出本论文的研究意义。分析了盾构施工的主要力学过程,介绍了ABAQUS有限元软件及隧道盾构开挖如何在ABAQUS中的实现等。(2)以五层钢筋混凝土框架结构为研究对象,采用ABAQUS建立起隧道-土体-建筑物共同作用的模型,将模拟结果与实测数据进行对比分析,并进一步对地表变形、结构变形及结构应力进行研究分析。(3)建立无建筑物的模型,分析土仓压力及注浆液长期强度对地表沉降的影响。(4)建立建筑物与隧道轴线成不同距离及相交成不同角度的模型,得到:建筑的自身刚度约束了地表及建筑物的变形;随着相互夹角的增加,建筑基础倾斜由开始的以纵向倾斜为主转变为以横向倾斜为主。(5)比较有无隔离墙两种模型,研究盾构施工中隔离墙的加固效果,结论:隔离墙的存在,建筑物水平位移减少了约55%,竖向沉降位移减少了60%左右。最后,总结了本文的主要研究成果并对隧道盾构这一课题进行了展望。
[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.
【学位授予单位】：苏州科技学院
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U455.43;TU433

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