城市隧道爆破振动对周围环境影响评价及控制技术研究

发布时间：2018-01-06 15:23

本文关键词：城市隧道爆破振动对周围环境影响评价及控制技术研究　出处：《西南交通大学》2015年硕士论文　论文类型：学位论文

【摘要】：近年来随着中国城市化进程明显加快,城市隧道等地下交通工程不断涌现。与山岭隧道相比,城市隧道具有埋藏浅,地表建筑物密集的特点,采用钻爆法进行施工时,施工振动会对邻近建筑物的结构安全及附近居民的正常生产生活造成负面影响。如何系统评价爆破施工振动对周围环境的影响,以及采取何种减振控制措施,是一个极具现实意义的研究课题。本文以重庆渝中连接隧道工程为背景,针对隧道爆破施工过程中的爆破振动效应对近接建筑物结构安全性影响、爆破振动效应对人员心理影响、振动控制措施等方面问题进行了一系列研究,本论文主要研究工作及研究成果体现在以下几个方面：(1)通过三维数值模拟计算方法研究了隧道爆破施工时的地表振速分布规律。计算表明隧道的已开挖区及既有近接隧道对爆破振动有放大作用。绘制了隧道沿线地表振速分区图,并结合现场实测数据对重庆渝中连接隧道沿线地表建筑物进行了结构安全性评价。(2)通过三维数值模拟计算方法研究了隧道爆破施工时,近接地铁车站的振动响应特点。计算结果表明地铁车站靠近爆源一侧直墙的振速最大,最大速度小于地铁车站结构安全振动控制标准值。(3)通过现场调查、统计回归的方法分析了不同年龄、性别人员对爆破振动的心理反馈,在此基础上推导了基于人群心理影响的振速控制标准值计算公式。(4)根据计算结果,结合渝中连接隧道的实际工程情况,优化了爆破施工区段；并研究了上台阶机械开挖与下台阶爆破开挖组合施工的减振方法。数值模拟计算结果和现场实测数据表明组合工法可以有效控制地表振速。
[Abstract]:In recent years, with the acceleration of urbanization in China, urban tunnels and other underground traffic projects have been emerging. Compared with mountain tunnels, urban tunnels have the characteristics of shallow burial and dense surface buildings. When drilling and blasting method is used in construction, construction vibration will have a negative impact on the structural safety of adjacent buildings and the normal production and life of nearby residents. How to systematically evaluate the impact of blasting construction vibration on the surrounding environment. And what kind of vibration reduction and control measures, is a very practical research topic. This paper takes Chongqing Yuzhong Tunnel Project as the background. Aiming at the influence of blasting vibration effect on the safety of adjacent buildings, the effects of blasting vibration effects on personnel psychology, vibration control measures and so on, a series of researches have been carried out in the light of the blasting vibration effect during tunnel blasting construction. The main research work and results of this thesis are reflected in the following aspects: 1). The distribution law of surface vibration velocity in tunnel blasting construction is studied by using three-dimensional numerical simulation method. The calculation shows that the excavation area and the existing adjacent tunnel can enlarge the blasting vibration, and draw the surface surface along the tunnel. Vibration velocity zoning. The structural safety evaluation of the surface buildings along the Yuzhong connecting tunnel in Chongqing is carried out with the field measured data.) the blasting construction of the tunnel is studied by using the three-dimensional numerical simulation method. The results show that the vibration velocity of the subway station near the side of the explosion source is the largest, and the maximum velocity is less than the standard value of the safety vibration control of the subway station structure. The result of calculation shows that the vibration velocity of the subway station is less than the standard value of the safety vibration control of the subway station structure. The method of statistical regression is used to analyze the psychological feedback of people of different ages and genders on blasting vibration. On this basis, the formula of calculating standard value of vibration velocity control based on the psychological influence of crowd is deduced. Combined with the actual engineering situation of Yuzhong connecting tunnel, the blasting construction section is optimized. The vibration absorption method of the combined construction of mechanical excavation and blasting excavation is studied. The numerical simulation results and field measured data show that the combined method can effectively control the surface vibration velocity.
【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】：U455.6

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