新建隧道下穿既有道路爆破施工影响范围

发布时间：2018-03-14 03:01

本文选题：隧道工程　切入点：爆破施工　出处：《深圳大学学报(理工版)》2017年03期 　论文类型：期刊论文

【摘要】：以宝汉高速爆破施工为例,通过现场监测关键质点爆破振动速度,研究爆破振动对临近既有道路的影响范围.研究结果表明,爆破振动波的主频率在10~50 Hz内,不会使周围临近既有道路与其产生共振.从现场测试结果可知,由于垂直振速大于径向振速和切向振速,且垂直振动对建筑物破坏尤为显著,故在类似工况下爆破振动监测应该以监测垂直振速为主.爆破振动波对既有道路的影响范围为30 m,与理论值相符.当浅埋大断面软弱围岩隧道下穿既有道路施工爆破的安全允许质点振动速度小于2.0 cm/s时,可确保既有道路结构和交通安全.研究可为此类隧道工程的施工提供借鉴.
[Abstract]:Taking Bao-Han high-speed blasting construction as an example, the influence of blasting vibration on adjacent roads is studied by monitoring the vibration velocity of key particle blasting on the spot. The results show that the main frequency of blasting vibration wave is within 1050Hz. The vertical vibration velocity is greater than the radial vibration velocity and the tangential vibration velocity, and the vertical vibration damage to the building is especially significant. Therefore, the monitoring of blasting vibration under similar working conditions should be based on monitoring vertical vibration velocity. The influence range of blasting vibration wave on existing road is 30 m, which is consistent with the theoretical value. When shallow and large section soft surrounding rock tunnel passes through the existing road, the construction is carried out. When the permissible particle vibration velocity of blasting is less than 2.0 cm/s, It can ensure the existing road structure and traffic safety. The study can provide reference for the construction of this kind of tunnel engineering.
【作者单位】：西安理工大学土木建筑工程学院;西安工业大学建筑工程学院;中交第一公路工程局有限公司;
【基金】：国家自然科学基金资助项目(51679199) 陕西省科技统筹创新工程重点实验室资助项目(2014SZS15-Z01) 西安工业大学校长基金资助项目(XAGDXJJ16003)~~
【分类号】：U455.6

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