城区复杂环境下浅埋暗挖法电力隧道设计研究与应用

发布时间：2018-11-02 15:38

【摘要】：随着城市电力需求的加大,当前有限的电力网已无法满足日益增长的拥挤的城市人口的需求。因此,在当前大背景下,兴建电压等级高,网络复杂的电力电缆隧道成为一种趋势。本文以湘潭中心220kV变配套电缆工程为依托,通过文献调研、工程类比、数值分析等多种手段,对隧道选线、横断面设计、纵断面设计、隧道主体结构及附属结构设计和现场施工风险控制进行了相应的研究,主要内容与成果如下： (1)湘潭中心变电站电缆隧道,具有埋深浅、地层主要为素填土和砂卵石层、自稳能力差、隧道上方市政管线密布以及地表存在交通荷载等特点,通过方案比选,确定采用浅埋暗挖法进行电力隧道施工； (2)基于工程类比法,结合地质条件,确定隧道走向、横、纵断面,并对隧道衬砌结构、分支口段主隧道结构、竖井、防排水系统等进行结构设计； (3)采用三维数值软件对围岩、拱部加固区稳定性及隧道衬砌结构、分支口主隧道结构、竖井结构安全性进行计算分析,结果表明：本文设计方案满足要求； (4)总结了电力隧道施工过程中控制措施,并结合本工程特点,归纳了施工风险源清单,提出了相应的风险控制措施及注意事项。
[Abstract]:With the increase of urban power demand, the current limited power grid can no longer meet the increasing demand of the crowded urban population. Therefore, it is a trend to build power cable tunnel with high voltage level and complex network under the current background. In this paper, based on the Xiangtan Center 220kV transformer cable project, through literature investigation, engineering analogy, numerical analysis and other means, the tunnel line selection, cross-section design, vertical section design, The design of the main structure and subsidiary structure of the tunnel and the risk control of the site construction are studied accordingly. The main contents and results are as follows: (1) the cable tunnel of Xiangtan central substation has shallow buried depth. The stratum is mainly composed of plain fill and sand pebbles, with poor self-stability, dense municipal pipelines above the tunnel and traffic load on the ground, etc. Through comparison and selection of schemes, shallow burying excavation method is adopted to carry out electric tunnel construction. (2) based on the engineering analogy method, combined with geological conditions, the tunnel direction, transverse section and vertical section are determined, and the tunnel lining structure, the main tunnel structure of the branch section, the shaft and the waterproof and drainage system are designed. (3) the stability of surrounding rock, arch reinforcement zone, tunnel lining structure, main tunnel structure and shaft structure safety are calculated and analyzed by using 3D numerical software. The results show that the design scheme meets the requirements; (4) the control measures in the construction process of electric power tunnel are summarized, and combined with the characteristics of the project, the list of construction risk sources is summarized, and the corresponding risk control measures and matters needing attention are put forward.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U455.4;TM757.3

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