复杂场地爆破振动对邻近构筑物动力响应及安全影响分析  

Analysis of Dynamic Response and Safety Influence of Blasting Vibration on Adjacent Structures in Complex Sites

作　　者：赵可 ZHAO Ke(China Railway 16th Bureau Group First Engineering Co.Ltd.,Beijing 101300,China)

机构地区：[1]中铁十六局集团第一工程有限公司

出　　处：《公路》2018年第11期41-46,共6页Highway

基　　金：中铁十六局集团第一工程有限公司新技术开发计划项目,项目编号K2017-07

摘　　要：在地形复杂、高差悬殊较大场地进行深挖路堑施工时,针对临近既有构筑物在爆破振动作用下所产生的动力响应和安全影响,基于较先进的网络测振仪系统,在邻近构筑物上布设爆破振动观测点,对爆破时产生地震波进行采集并详细分析。结果表明,在一定范围内地形高差对爆破振动传递有明显影响,近爆心处质点振动以垂向为主,且为高速低频振动,对结构会产生较大影响;爆心与构筑物水平距离在20m范围内时采用露天浅孔爆破,可以控制爆破对周围结构产生的振动影响;分析所有爆破记录数据可知,其主振频率对应的振动速度峰值均在规范要求范围之内,对构筑物实地巡查也未发现损伤现象;该爆破工程所采集数据为进一步研究爆破技术在复杂场地中的应用提供了大量材料。When the terrain is complex and the height difference is very large,the deep excavation construction is carried out,the dynamic response and safety effects of adjacent structures under blasting vibration are monitored and analyzed in real time,based on a more advanced network vibrometer system,a blasting vibration observation point is arranged on the adjacent structure,the shock wave produced during blasting is collected and analyzed in detail.The result shows,in a certain range,the height difference of terrain has obvious influence on the transmission of blasting vibration,in the vicinity of the detonation core,the particle vibration is mainly vertical,and high speed low frequency vibration,the structure will have a greater impact;When the distance between the core and the structure is in the range of 20 m,the blasting with shallow hole and small amount of explosive is adopted,the vibration of the surrounding structure can be controlled by blasting;Analyze all blasting record data,the vibration speed peak corresponding to its main vibration frequency is within the standard requirement,field inspections of structures found no damage;The data collected from blasting engineering provide a great deal of data for further research on blasting technology in complex sites.

关 键 词：公路工程 深挖岩石路堑 爆破振动 动力响应 安全分析 

分 类 号：U416.113[交通运输工程—道路与铁道工程]