昆明地铁3号线隧道施工地表沉降研究

发布时间：2018-03-08 11:43

本文选题：轨道交通　切入点：地铁隧道　出处：《吉林大学》2014年硕士论文　论文类型：学位论文

【摘要】：本文依托昆明地铁3号线东标段土建工程实例，根据地铁隧道的几个不同施工工艺的区段获得的地表沉降实测数据，通过沉降实测数据整理分类，分析研究浅埋暗挖法和盾构法施工引起的地表沉降指标。本文采用数学统计分析方法为非线性回归、多项式回归、分段函数回归等，通过地表沉降数据研究分析，得出浅埋暗挖法及盾构法地表沉降数据分析结论，并提出应对地表沉降的技术应对措施。本文得出的结论能够为今后国内具备相似建设条件的地铁隧道施工提供一些理论数据的参考。本文的最终成果如下： 1.昆明地铁3号线东标段地铁隧道浅埋暗挖法施工过程中，采用台阶法施工工艺的，上台阶开挖引起的地表沉降量占由总地表沉降量的量化百分比在55%左右； 2.昆明地铁3号线东标段地铁隧道浅埋暗挖法施工过程中，隧道覆土厚度越大，其地表沉降量越小，沉降量随隧道覆土厚度呈现反比例关系； 3.采用盾构法施工引起的沉降量和沉降速率，，较大阶段发生在盾构机通过施工作业面前的沉降和盾构机盾尾空隙的沉降阶段，控制沉降的这两个阶段最为必要。
[Abstract]:Based on the example of civil engineering in east tender section of Kunming Metro Line 3, according to the measured surface settlement data obtained from several sections of different construction techniques of subway tunnel, this paper classifies and classifies the measured settlement data through the measured settlement data. This paper analyzes and studies the surface subsidence index caused by shallow burying excavation method and shield tunneling method. The mathematical statistical analysis methods are nonlinear regression, polynomial regression, piecewise function regression and so on, and the surface subsidence data are studied and analyzed in this paper. The conclusion is drawn that the surface subsidence data of shallow buried excavation method and shield tunneling method are analyzed. The conclusion of this paper can provide some theoretical reference for the subway tunnel construction with similar construction conditions in the future. The final results of this paper are as follows:. 1. In the construction process of shallow subsurface excavation method of subway tunnel in east standard section of Kunming Metro Line 3, the quantitative percentage of surface settlement caused by the excavation of upper steps is about 55%; 2. In the construction process of the shallow excavation method of the subway tunnel in the east section of Kunming Metro Line 3, the larger the overlying soil thickness of the tunnel, the smaller the surface settlement, and the settlement is inversely proportional to the overlying soil thickness of the tunnel; 3. The settlement amount and settlement rate caused by shield tunneling method occur in the stage of the settlement before the shield machine passes through the construction operation and the settlement stage of the shield machine tail gap, and the two stages of controlling the settlement are the most necessary.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U231.3;U455

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