地铁隧道掘进下穿BRT车站爆破振动效应研究

发布时间：2018-04-12 10:12

  本文选题：地铁车站 + 隧道工程　； 参考：《施工技术》2017年17期

【摘要】：以乌鲁木齐地铁1号线中营工—铁路局区间隧道施工为背景,研究了隧道爆破开挖对其上方BRT车站的振动影响。基于现场监测,分析了爆破振动对爆源上方的影响范围,比较分析了CRD法施工时各部分爆破开挖对车站基础振动峰值大小和频谱特征,基于监测结果优化了爆破施工方案。通过以上研究,得出如下结论:爆破振动对爆源上方地表前后10m范围影响最为显著;CRD法施工时,第1步工序开挖爆破振动影响显著;隧道掘进,掏槽爆破引起的振动显著增强,选择合理的掏槽结构形式、爆破参数等,是浅埋隧道开挖中控制爆破振动的关键。
[Abstract]:Based on the tunnel construction in the section of Zhongying and Railway Bureau of Urumqi Metro Line 1, the effect of blasting excavation on the vibration of BRT station above it is studied.Based on site monitoring, the influence range of blasting vibration on the top of blasting source is analyzed, and the peak value and frequency spectrum characteristics of each part of blasting excavation to the vibration of station foundation during the construction of CRD method are compared and analyzed. Based on the monitoring results, the blasting construction scheme is optimized.Through the above research, the following conclusions are drawn: blasting vibration has the most significant effect on the front and rear 10 m range above the blasting source. In the first step of construction, the blasting vibration in the first step of excavation is significant, and the vibration caused by tunneling and cutting blasting is significantly enhanced.Choosing reasonable cutting structure and blasting parameters is the key to control blasting vibration in shallow tunnel excavation.
【作者单位】： 北京市政路桥股份有限公司;北京工业大学建筑工程学院;
【基金】：北京市政路桥股份有限公司科技开发项目 国家自然科学基金重点项目(12004014201501)
【分类号】：U231.3;U455.6
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本文编号：1739299