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施工技术

隧道控制爆破深大减振孔减振效果对比

  • 李克先 ,
  • 赵继增 ,
  • 雷刚
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  • (1. 青岛地铁集团有限公司, 山东青岛 66000; 2. 北京城建设计研究总院有限责任公司, 北京 10000)
李克先(1982—),男,山东高密人,2008年毕业于同济大学,岩土工程专业,硕士,工程师,主要从事爆破、暗挖、隧道及地下工程研究工作。

收稿日期: 2015-04-03

  修回日期: 2015-05-07

  网络出版日期: 2015-06-25

Study on Vibrationreducing Effect of Deep and Large Vibrationreducing Hole: Case Study on Control Blasting of a Shallowburied Mined Station of Qingdao Metro

  • LI Kexian ,
  • ZHAO Jizeng ,
  • LEI Gang
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  • (1. Qingdao Subway Group Co., Ltd., Qingdao 266000, Shandong, China; 2. Beijing Urban Engineering Design and Research Institute Co., Ltd., Beijing 100000, China)

Received date: 2015-04-03

  Revised date: 2015-05-07

  Online published: 2015-06-25

摘要

浅埋暗挖车站下穿岩石地层大多采用钻爆法施工,不可避免地对周边建(构)筑物产生振动效应。以青岛地铁某浅埋暗挖车站为例,为避免爆破施工对周边加油站等高爆炸隐患工程影响过大,施工中采取布设减振孔措施,现场开展减振孔减振效果测试试验,在受保护区打286个减振孔,对受保护区监测点和与爆心相同距离的非保护区监测点同时进行连续15 d爆破振速监测,对监测数据进行对比分析。研究结果表明: 减振孔措施有效降低了爆破振动对周边环境的影响,振速平均衰减比例达到35.4%,较好地保证了周边高风险建(构)筑物的安全。

本文引用格式

李克先 , 赵继增 , 雷刚 . 隧道控制爆破深大减振孔减振效果对比[J]. 隧道建设, 2015 , 35(6) : 595 -600 . DOI: 10.3973/j.issn.1672-741X.2015.06.017

Abstract

Drilling and blasting method is often used in the construction of shallowburied Metro stations located in rock strata, and it is inevitable that vibration effect may occur to the surrounding buildings. In this paper, vibrationreducing holes are used in the blasting construction of a shallowburied station of Qingdao Metro, so as to minimize the impact on the surrounding buildings. A series of tests and monitoring have been carried out for the vibrationreducing holes, blasting vibration velocity and vibrationdamping effect. The results show that the influence on the surrounding buildings has been reduced by using vibrationreducing holes, the average vibration velocity attenuation ratio reaches 35.4%, and the safety of the surrounding buildings has been guaranteed.

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