天城坝高瓦斯隧道施工技术研究

发布时间：2018-10-10 11:26

【摘要】：随着中国近年来高速公路网的飞速发展,隧道施工项目逐年增多,尤其是在中国西南部高海拔地区,山峦起伏,地质情况复杂多变,高瓦斯、多溶洞现象尤为突出,隧道施工技术要求高、施工难度大。受到地质情况及周边环境的影响,瓦斯隧道常见的地质灾害情况已经引起了人们的重视,它给施工人员带来了许多困扰。因此,加强对高瓦斯隧道的施工过程的控制,提高瓦斯隧道的施工技术尤为重要。本课题结合"贵州省正安至习水高速公路天城坝高瓦斯隧道"主要的施工过程,重点考虑高瓦斯隧道的超前地质预报技术,隧道的开挖方法、瓦斯监控检测与防治技术、针对高瓦斯隧道的瓦斯突出问题,制定了瓦斯监控检测的防治方案及高瓦斯隧道施工需要注意的安全问题,考虑到隧道的煤系地层地质情况,采用合理的高瓦斯隧道开挖方法,采用钻爆法进行开挖,在爆破设计中,针对爆破材料、爆破参数、爆破计算及炮孔的布置进行了详细的阐述并给出相应的详细理论计算分析,另外本次设计采用的是水泡泥和固体阻燃炮泥结合的方式封堵炮孔,极大的提高了爆破的安全性。超前地质预报施工技术采用TRT600预报系统,地质预报结合现场勘测数据,通过勘测区域的地震波反射扫描成像三维图、P波波速、结合掌子面地质观测信息得出结论。总结国内外高瓦斯隧道施工的经验,制定了切实可行的隧道施工方案和施工安全保障,并取得了一定的工程经济效益。同时高瓦斯隧道的施工技术的应用也为以后的高瓦斯隧道施工积累一定的参考资料,促进类似工程的施工技术推广。
[Abstract]:With the rapid development of highway network in China in recent years, the number of tunnel construction projects is increasing year by year, especially in the high altitude area of southwest China, the mountains are undulating, the geological conditions are complex and changeable, the phenomenon of high gas and multi-karst cave is especially prominent. The tunnel construction technology request is high, the construction difficulty is big. Due to the influence of geological conditions and surrounding environment, the common geological hazards in gas tunnels have attracted people's attention, which has brought a lot of troubles to the construction staff. Therefore, it is very important to strengthen the control of the construction process of the high gas tunnel and improve the construction technology of the gas tunnel. Combining with the main construction process of "Tiancheng Dam High Gas Tunnel of Zhengan to Xishui Expressway in Guizhou Province", this paper focuses on the advanced geological prediction technology, excavation method, gas monitoring and detection and prevention technology of high gas tunnel. In view of the gas outburst problem in high gas tunnel, the prevention and control scheme of gas monitoring and detection and the safety problems needing attention in the construction of high gas tunnel are worked out. Considering the geological conditions of coal measure strata in the tunnel, the reasonable excavation method of high gas tunnel is adopted. In the blasting design, the blasting materials, blasting parameters, blasting calculation and the layout of the blasting holes are described in detail, and the corresponding theoretical calculation and analysis are given. In addition, the design adopts the combination of blistering mud and solid flame-retardant mortar, which greatly improves the safety of blasting. The construction technology of advanced geological prediction is based on TRT600 forecasting system. The geological prediction combined with field survey data, through seismic wave reflection scan imaging 3D map and P wave velocity, and combined with the geological observation information of palm surface, draws a conclusion. This paper summarizes the experience of high gas tunnel construction at home and abroad, formulates feasible tunnel construction plan and construction safety guarantee, and obtains certain engineering economic benefit. At the same time, the application of construction technology of high gas tunnel also accumulates some reference materials for the construction of high gas tunnel in the future, and promotes the popularization of construction technology of similar projects.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U455.4

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