城市地铁盾构法施工对上部桥梁的影响研究

发布时间：2018-03-22 00:18

本文选题：地铁盾构　切入点：拱桥-地基联合作用　出处：《重庆交通大学》2015年硕士论文　论文类型：学位论文

【摘要】：盾构法是城市地铁隧道重要的施工方法,施工过程中扰动土体致使盾构顶部产生沉降变形。本文研究昆明地铁3号线盾构下穿盘龙江时对南太桥的影响。本文主要从以下几个部分开展研究:①本文介绍了盾构施工引起地表沉降的机理、盾构法施工对地表沉降变形的影响、盾构法施工对周围建筑物的影响、地表沉降变形的防治方法等。②本文依托昆明地铁3号线省博物馆站~文化宫站盾构区间隧道工程,运用MSC.Marc大型有限元分析软件建立土层桥梁结构三维实体模型,模拟盾构施工过程典型施工工况,研究盾构下穿南太桥阶段拱桥的变形和受力性能。③本文采用激光投射漫反射式挠度监测系统、仿生机敏网裂缝监测系统、振弦式应力传感器测试系统分别对桥梁关键位置的变形、裂缝、应力进行监测,并建立无线远程实时监测系统。本文的研究工作为昆明地铁3号线省博物馆站~文化宫站盾构区间隧道下穿南太桥工程提供了实用、有效的监测方案,为将来类似的盾构下穿既有桥梁工程提供了参考依据,具有一定的借鉴意义。
[Abstract]:Shield tunneling is an important construction method for urban subway tunnel. During the construction process, the disturbance of soil resulted in the settlement and deformation of shield top. This paper studies the influence of shield tunneling on Nantai Bridge under shield driving on Kunming Metro Line 3. This paper mainly discusses the following parts: 1. The mechanism of ground subsidence caused by shield construction, The influence of shield construction on ground subsidence and deformation, the influence of shield construction on surrounding buildings, the prevention and treatment methods of surface subsidence deformation, etc. 2. This paper relies on the shield tunnel project of Kunming Metro Line 3 ~ Culture Palace Station. The three-dimensional solid model of soil layer bridge structure is established by using MSC.Marc software, and the typical construction conditions of shield construction are simulated. Study on deformation and Mechanical Properties of Arch Bridge in the stage of passing through Nantai Bridge under Shield. .3 in this paper, the laser projective diffuse reflection deflection monitoring system and the bionic smart network crack monitoring system are used. The testing system of vibrating string stress sensor monitors the deformation, crack and stress of the bridge at the key position. The research work in this paper provides a practical and effective monitoring scheme for the project of tunneling through the South Pacific Bridge under the shield tunnel of the Provincial Museum Station of Kunming Metro Line 3 ~ Culture Palace Station. It provides reference basis for similar shield tunneling existing bridge engineering in the future, and has certain reference significance.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U231.3;U455.43

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