城市复杂环境下电力隧道修建关键技术研究

发布时间：2018-03-30 16:48

本文选题：电力隧道　切入点：浅埋暗挖　出处：《西南交通大学》2015年硕士论文

【摘要】：近年来随着经济的飞速发展和电网建设的持续推进,地下电缆隧道成为解决不断增长的电力负荷和电力通道资源相对稀缺的矛盾,以及现代化城市高标准的景观要求与地面资源稀缺之间的矛盾的关键技术手段。本文以虹桥工程昭觉寺变电站～游乐园变电站220KV输变电电力通道工程(三环路～北牵引站)暗挖电缆隧道为依托,以复杂城市环境条件下,修建城市电缆隧道的工程技术难度和重点为核心,综合运用文献调研、数值仿真,现场试验等手段,围绕“电力隧道下穿复杂城市环境快速施工技术、电力隧道近接构筑物稳定性”问题,展开大量的研究工作,得到如下研究成果：1、结合成都工程和水文地质特点,综合分析对比电力隧道常见的三种工法：浅埋暗挖法,顶管法,盾构法,结合论文依托工程的实际情况,选择了浅埋暗挖法对昭觉寺变电站～游乐园变电站市政电力通道工程进行施工。2、在隧道开挖时采用掌子面施做GFRP锚杆+注浆小导管辅助工法。施加超前小导管和掌子面锚杆可以起到对掌子面加固的作用,有效维持掌子面及周边围岩的稳定,有助于控制地表沉降,为电力隧道的安全快速施工提供保障。3、通过有限差分的方法对电力隧道近接工况展开研究,得出了电力隧道施工对既有隧道影响轻微的结论。4、数值模拟计算所得结果与现场监测的实测数据规律吻合,数值差别较小,表明该数值计算模型能较好地模拟电力隧道施工的力学机理。
[Abstract]:In recent years, with the rapid development of economy and the continuous development of power grid construction, underground cable tunnel has become a contradiction to solve the increasing power load and the relative scarcity of power channel resources. As well as the key technical means of contradiction between the high standard landscape requirements of modern cities and the scarcity of ground resources. In this paper, the 220KV transmission and transformation power channel project of Zhaojue Si Substation ~ amusement park substation (Sanhuan Road) is used in Hongqiao Project. North traction Station) dig the cable tunnel to rely on, Based on the difficulty and emphasis of construction of urban cable tunnel under complex urban environment, the paper makes comprehensive use of literature investigation, numerical simulation, field test and so on, and revolves around the "rapid construction technology of electric power tunnel through complex urban environment". The problem of the stability of the near junction structure of power tunnel has been carried out a lot of research work has been carried out, and the following research results have been obtained: 1. According to the characteristics of Chengdu engineering and hydrogeology, three common working methods of power tunnel are analyzed and compared: shallow burying method, pipe jacking method, and so on. The shield method, combined with the actual situation of the paper relying on the project, The shallow burying excavation method is selected to construct the municipal power passage project of Zhaojesi Substation ~ amusement park substation. The auxiliary method of GFRP anchor grouting small conduit is adopted in the tunnel excavation. The leading small pipe and the leading small pipe are applied. The face of the palm bolt can play a role in strengthening the face of the palm, To maintain the stability of face and surrounding rock effectively, to control the surface subsidence, to provide security for the safe and rapid construction of power tunnel, and to study the near connection condition of power tunnel by finite difference method. It is concluded that the power tunnel construction has a slight influence on the existing tunnel. The numerical simulation results are in agreement with the observed data, and the difference between the numerical value and the field monitoring data is small. It is shown that the numerical model can well simulate the mechanical mechanism of power tunnel construction.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U455.4;TM75

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