爆破施工对邻近隧道安全的影响  

Study on safety influence of blasting construction close to existing tunnel

作　　者：钱耀峰 王星华[2] 

机构地区：[1]中国铁建青岛蓝色硅谷项目指挥部,山东青岛320000 [2]中南大学土木工程学院,湖南长沙410075

出　　处：《北京交通大学学报》2014年第4期90-96,共7页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：国家"863"计划项目资助(2007AA11Z134)

摘　　要：城市交通工程新建隧道爆破施工会对近邻既有工程的衬砌结构产生影响,严重时会影响既有工程结构的安全.本文基于数值模拟方法,计算分析了4种最危险施工条件下,新建崂山隧道爆破对既有仰口公路隧道的影响.结果表明:崂山隧道的进、出口及中间段,爆破施工对既有仰口隧道的左线影响有限,对较远处右线的影响较小.在崂山隧道进口、出口和垂直距离最近处,计算结果都远低于我国《爆破安全规程》(GB 6722—86)规定的交通隧道安全振动速度标准值15 cm/s.但在崂山隧道断层破碎带(F5)爆破施工最危险条件下,计算速度最大值达到15.26 cm/s,该值已达到安全振动速度规定的临界值下限,建议施工过程中需要采取必要的工程安全措施.Urban traffic engineering new tunnel blasting construction will affect lining structure of the existing engineering and seriously will affect the safety of the existing engineering. Based on the nu- merical simulation method, Laoshan new tunnel blasting construction＇s effects on the existing bunos- tomum highway tunnel have been analyzed under the four most dangerous construction conditions. The results show that in the in entrance, exit and middle section of the Laoshan tunnel, blasting construc- tion has a limited effect on the left of the existing bunostomum highway tunnel, and it is smaller on the right in distant. In the nearest section of Laoshan tunnel＇s entrance, exit and vertical distance, the re- suits are far lower than the vibration speed traffic tunnel safety standard value of 15 cm/s, which is provided by ＂Blasting Safety Regulations＂ （GB 6722--86） in China. However, under the most dan- gerous conditions in Laoshan tunnel in fault fracture zone （F5）, the value of vibration speed traffic tunnel safety has reached to 15.26 cm/s, exceeding the critical value of security vibration velocity. Therefore, some engineering safety measures are necessary in the construction process.

关 键 词：隧道工程 爆破 安全施工 衬砌 波速 

分 类 号：U458.1[建筑科学—桥梁与隧道工程]