顶溪隧道施工技术研究

发布时间：2018-07-05 00:40

本文选题：开挖方法 + 瓦斯　；参考：《石家庄铁道大学》2015年硕士论文

【摘要】：近年来,我国的铁路建设如火如荼,在铁路建设中,就会遇到更为复杂的地层。本文以顶溪隧道工程为背景,以研究隧道施工过程中穿越复杂地层的施工方法为目的。顶溪隧道所经复杂地层主要为瓦斯煤系地层、岩溶溶洞、断裂破碎带等,危险性较大,施工难度高,为采取合理高效的施工方法,本文选择了常用的三台阶开挖法和CD法进行比较,从围岩应力场、位移场、塑性区及支护结构的受力变形等方面进行详细比较分析,并结合这两中隧道施工方法的特点,从而确定施工方法。本文借助有限元软件Ansys进行三维数值模拟分析,能有效分析不同开挖步之间的对围岩和支护结构的影响及其相互关系,从空间效应和时间效应上更为接近实际施工。在复杂地层施工中,制定安全有效的施工方法极为重要。根据隧道信息化施工的特点,隧道在施工过程中建立了监控量测制度,用监测数据来验证施工方法的安全性和支护结构的稳定性,为此本文选择了几个典型断面的监测数据,进行分析支护结构变形位移趋势。另外隧道施工过程中,遇到了岩溶地带、瓦斯地层及断裂破碎带,为成功穿越这些不良地层,制定了较为详细的施工技术方案和措施。
[Abstract]:In recent years, railway construction in China is in full swing. Based on the Dingxi tunnel project, the purpose of this paper is to study the construction method of crossing the complex stratum in the tunnel construction process. The complex strata of Dingxi Tunnel are mainly gas and coal measure strata, karst caverns, fracture broken zones, etc., which are dangerous and difficult to construct, so as to adopt reasonable and efficient construction methods. In this paper, three step excavation method and CD method are selected to compare and analyze the stress field, displacement field, plastic zone and deformation of supporting structure in detail, and combined with the characteristics of the two tunnel construction methods. Thus, the construction method is determined. With the help of finite element software Ansys, this paper can effectively analyze the influence of different excavation steps on the surrounding rock and the supporting structure and their mutual relationship, which is closer to the actual construction in terms of space effect and time effect. In the construction of complex strata, it is very important to establish safe and effective construction methods. According to the characteristics of the tunnel information construction, the monitoring and measuring system is established in the course of the tunnel construction, and the safety of the construction method and the stability of the supporting structure are verified by the monitoring data. In this paper, the monitoring data of several typical sections are selected. The trend of deformation and displacement of supporting structure is analyzed. In addition, in the course of tunnel construction, the karst zone, gas formation and fracture zone are encountered. In order to successfully cross these bad formations, detailed construction technical schemes and measures are formulated.
【学位授予单位】：石家庄铁道大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U455.4

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