【作者】 王海；

【导师】 谭忠盛；

【作者基本信息】 北京交通大学 ， 建筑与土木工程， 2017， 硕士

【摘要】 我国高速铁路隧道修建正在蓬勃发展,新的"十三五"规划更是将其视为国家投资的重点,且铁路修建重点开始向中西部地区转移。鉴于中西部地区各种复杂地质环境和社会环境,尤其是喀斯特地貌浅埋富水软岩情况下,难免遇到各种各样的难题,而爆破减震问题成为亟待解决的问题。本文以沪昆客专贵州段丫口寨大断面富水岩溶隧道工程为依托,通过现场调研、理论分析、现场监测、数值模拟等方法研究铣挖爆破施工技术在浅埋过民房段、浅埋过明河段隧道施工中的应用。主要工作及成果如下:(1)通过理论分析爆破破岩机理,分析了机械铣挖加控制爆破新工法在减震施工中的优越性。结合现场具体工况,分析了铣挖机的参数选取、铣挖方案设计、具体施工中工作效率、经济性及适用性问题。(2)通过现场试验及爆破振动监测,研究论证了铣挖爆破工法在浅埋过民房段减震施工情况下的可行性。(3)通过分析目前爆破振动的相关理论,借助有限元软件数值模拟论证了铣挖爆破工法相比于钻爆法在减震方面的优势。更多还原

【Abstract】 High-speed railway tunnel construction in our country is booming,the new "much starker choices-and graver consequences-in planning is to regard it as the focus of the national investment,and railway construction has began to shift to the Midwest.In view of the various complex geological environment and social environment ofcentral and western regions,especially the karst water rich soft rock shallow buried,it’s hard to avoid different sorts of problem,with the blasting vibration problems becoming a problem to be solved.This paper,based on the rich water karst-Yakou village tunnel of Shanghai-Kunming Passenger dedicated line,analysised the application of milling-blasting technology in tunnel construction under shallow buried houses and river section,through field investigation、theoretical analysis、field monitoring and numerical simulation methods.The main working achiebements are as follows:(1)Through the theoretical analysis of rock blasting mechanism,analyzed the damping superiority of milling-blasting method.Combined with the site specific conditions,analyzed the milling parameters,milling dig scheme design,concrete construction efficiency,economy and applicability.(2)Through the field test and blasting vibration monitoring,demonstrated the feasibility of milling-blasting method used in tunnel damping construction under shallow buried houses.(3)By analyzing the relevant theories of blasting vibration and the means of finite element software numerical simulation,demonstrated the shock absorption advantage ofmilling-blasting method compared to the conventional drilling-blasting method.更多还原