胡平
HU Ping

• 1:北京京投交通发展有限公司

摘要(Abstract)：

为了解决复杂地质条件下地铁隧道爆破施工对下穿建筑物时爆破振动安全问题，以青岛地铁3号线一期工程万年泉路站～李村站区间隧道下穿万隆商厦为工程实例，采用优化的掏槽型式、爆破参数及装药结构，利用在砂岩交界面打设减振空孔，增加爆破自由面，结合毫秒雷管和孔外延时起爆网路技术，对地表建筑物爆破振动进行实时监测。结果表明：在地铁隧道下穿建筑物爆破施工期间，地表建筑物爆破振速成功地控制在1.5 cm/s以内，满足施工安全和进度要求，取得了良好的经济、社会和环境效益，对今后类似复杂地质条件下城市地铁隧道下穿建筑物爆破施工具有一定的借鉴意义。
In order to reduce vibration caused by blasting construction of subway tunnels beneath buildings under complex geological conditions, the blasting operation from Wannianquan Station to Licun Station in the firststage project of Qingdao Metro Line 3 beneath Wanlong Commercial Mall is taken as the research object.By adopting the optimized cutting type, blasting parameters and charge structure, drilling vibration damping holes at the interface of sandstone to increase the blasting free face, and combining millisecond detonators and out-of-hole delayed initiation circuits, the blasting vibration of surface buildings is monitored in real time. The results show that the blasting vibration velocity of surface buildings is successfully controlled within 1.5 cm/s during the blasting construction of subway tunnels beneath buildings, which meets the requirements of construction safety and progress, and achieves a good economic, social and environmental benefit. It has a certain reference value for the blasting construction of urban subway tunnels beneath buildings under similar complex geological conditions in the future.

关键词(KeyWords)： 浅埋隧道;下穿建筑物;爆破技术;减振
shallow tunnel;beneath building;blasting technology;vibration reduction

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 胡平
HU Ping

DOI: 10.19931/j.EB.20200270

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