交通—电力隧道共建方案优化及施工力学研究

发布时间：2018-01-05 20:05

本文关键词：交通—电力隧道共建方案优化及施工力学研究　出处：《重庆大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着山地城市交通隧道和其它公用设施隧道的快速发展,有时要考虑隧道共建问题。共建隧道的研究方法和实际的施工经验还相对匮乏,当前关于共建隧道的研究主要借鉴单孔大断面隧道及双孔近接隧道的研究成果。本文结合重庆同茂大道金竹湾隧道与电力隧道共建项目,在理论分析及模拟计算的基础上,首先通过对交通-电力隧道两种共建方案的对比,提出较佳的共建方案。然后对提出较佳方案下的共建隧道进行施工力学研究。研究成果可为类似共建隧道的修建提供借鉴和参考。开展的主要工作如下:①分析提出了两种共建方案,一是电力隧道建在城市交通隧道左隧道仰拱的正下方(简称方案一);二是电力隧道建在左隧道仰拱的左侧(简称方案二);将此两种共建隧道简化为等代圆形隧道,分析其受力和变形,从理论上分析确定共建方案。②针对以上两种方案,建立二维有限元模型,利用有限元软件GTS对两种方案下交通-电力共建隧道的开挖和支护过程进行模拟,然后对应力、位移、支护结构内力及塑性区的分布特征进行对比,进一步确定和验证共建方案。③依据确定的共建方案,结合检修道及人行道与左、右隧道的关系,建立复杂的三维有限元模型,对检修道段共建隧道进行施工力学效应研究,详细分析开挖和支护过程中支护结构的内力和围岩的应力、位移及塑性区的变化规律。然后对检修道及人行道与隧道交叉口处的应力和位移进行分析,研究人行道及检修道的开挖对隧道围岩的位移和应力的影响范围。
[Abstract]:With the rapid development of traffic tunnels and other public facilities tunnels in mountainous cities, it is necessary to consider the problem of tunnel co-construction sometimes. The research methods and practical construction experience of co-construction tunnels are relatively scarce. At present, the research on the co-construction of tunnel mainly draws on the research results of single-hole large-section tunnel and double-hole tunnel. This paper combines the project of co-construction of Jinzhu Bay tunnel and power tunnel in Tongmao Avenue, Chongqing. On the basis of theoretical analysis and simulation calculation, first of all, through the comparison of the two co-construction schemes of traffic and power tunnel. A better co-construction scheme is put forward, and then the construction mechanics of the co-constructed tunnel under the better scheme is studied. The research results can provide reference and reference for the construction of similar co-construction tunnel. The main work is as follows:. 1. Two kinds of co-construction schemes are put forward. First, the electric tunnel is built directly below the inverted arch of the left tunnel of the urban traffic tunnel. Second, the electric tunnel is built on the left side of the inverted arch of the left tunnel. This paper simplifies the two kinds of co-construction tunnel into an equivalent circular tunnel, analyzes the force and deformation of the tunnel, and theoretically analyzes and determines the co-construction scheme .2 to establish a two-dimensional finite element model for the above two schemes. The finite element software GTS is used to simulate the excavation and support process of the two schemes, and then the stress, displacement, the internal force of the supporting structure and the distribution characteristics of the plastic zone are compared. Further determine and verify the co-construction scheme .3 according to the determined co-construction plan, combined with the repair track and sidewalk and left, right tunnel relationship, the establishment of a complex three-dimensional finite element model. The construction mechanics effect of the co-construction tunnel in the maintenance section is studied, and the internal force of the supporting structure and the stress of surrounding rock in the process of excavation and support are analyzed in detail. Then the stress and displacement of the overhaul track and the intersection of the sidewalk and the tunnel are analyzed to study the influence of the excavation of the sidewalk and the maintenance track on the displacement and stress of the surrounding rock of the tunnel.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U459.9;U455.4

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