大连地铁2号线盾构施工引起的地表沉降研究

发布时间：2018-05-29 13:47

本文选题：盾构施工 + 地表沉降　；参考：《大连交通大学》2014年硕士论文

【摘要】：盾构法是地铁隧道施工中一种重要的施工工法,凭借其施工技术的安全性和先进性等特点,在城市地铁隧道施工中得到越来越广泛的应用。但盾构法施工不可避免的会引起地表沉降,当地表沉降过大时将危及周围建筑物和地下管线等建(构)筑物的稳定,从而造成严重的经济损失和社会影响。本文通过对大连地铁2号线202标段大量的施工监测资料进行分析,研究了盾构掘进过程中地表沉降的发展规律和影响因素,论述了盾构机具选型和掘进参数的控制原则。本文利用ABAQUS有限元软件对盾构隧道掘进过程进行三维数值模拟,考虑施工间隙、施工质量、土的非线性及土体与管片协同作用,经过对比有限元分析计算结果和实际监测数据,得出较好的拟合结果。在理论上从水平、径向及竖向等多个维度研究盾构施工所引起的地层损失和围岩变形,同时讨论双线盾构、加固处理及隧道埋深等地表建筑物对施工沉降的影响。经过大量分析计算,得到了一些有益的结果。可以为大连和相近地质条件下地铁盾构施工提供一定的理论指导。鉴于ABAQUS软件的缺陷和作者有限的水平,提出了一些数值模拟的优化方案和研究的改进思路,为今后相关研究提供些微借鉴。
[Abstract]:Shield method is an important construction method in the construction of subway tunnel. With its construction technology's safety and advanced characteristics, it is more and more widely used in the construction of urban subway tunnel. However, the shield method will inevitably cause the surface subsidence. When the local surface subsidence is too large, it will endanger the surrounding buildings and underground pipelines and so on. The stability of construction and construction will cause serious economic loss and social influence. Through the analysis of the large number of construction monitoring data of the 202 section of Dalian Metro Line 2, the development law and influencing factors of the ground settlement during the shield tunneling are studied, and the selection of the shield machine tools and the control principles of the driving parameters are discussed.
In this paper, the ABAQUS finite element software is used to simulate the tunneling process of the shield tunnel, considering the construction clearance, the construction quality, the soil nonlinearity and the coordination of the soil and the pipe. Through the comparison of the finite element analysis results and the actual monitoring data, the better fitting results are obtained. In theory, it is from the level, radial and vertical. This paper studies the formation loss and the deformation of the surrounding rock caused by the shield construction. At the same time, it discusses the influence of surface buildings such as double line shield, reinforcement treatment and tunnel depth on construction settlement. After a large amount of analysis and calculation, some useful results have been obtained. It can provide some theoretical guidance for subway shield construction under Dalian and similar geological strip. In view of the defects of the ABAQUS software and the limited level of the author, some optimization schemes for numerical simulation and the improvement of the research are put forward to provide some reference for future research.
【学位授予单位】：大连交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U455.43

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