城市隧道施工爆破振动影响规律及降振技术研究  

Study on Influence Law of Blasting Vibration and Vibration Reduction Technology in Urban Tunnelling

作　　者：杨钊 YANG Zhao(Guangzhou Donghai Investment Management Co.,Ltd.,Quanzhou 362000)

机构地区：[1]泉州市东海投资管理有限公司,泉州362000

出　　处：《现代隧道技术》2021年第6期225-232,共8页Modern Tunnelling Technology

摘　　要：文章依托泉州市东海隧道,从周边地表建筑结构安全和人群爆破心理承受能力出发,通过数值仿真计算和现场监测,探究施工爆破对地表建筑的影响规律。通过设计人群对爆破振动的心理承受能力问卷调查表,采用t分布曲线对所取得的309份问卷结果进行统计分析,探究施工爆破对附近人群爆破心理耐受度的影响。基于最大爆破振速,通过理论推导与回归拟合,提出了不同围岩的爆破降振控制技术。研究结论表明:综合考虑地表建筑结构安全与人群爆破心理耐受度两大影响因素,城市隧道施工的爆破振速宜小于1.11 cm/s;从人群爆破心理耐受度出发,装药量在24.63~34.5 kg范围内各级围岩施工爆破振动的最小距离分别为35.9 m(Ⅴ级),35.1 m(Ⅳ级),45.6 m(Ⅲ级)。On the basis of the Donghai tunnel in Quanzhou,the paper,starting from the structural safety of surrounding surface buildings and the psychological endurance of people to blasting,explores the influence law of construction blasting on surface buildings through numerical simulation calculation and on-site monitoring.The influence of construction blasting on the psychological tolerance of nearby people is explored by means of designing the questionnaire on the psychological tolerance of people to blasting vibration,and carrying out statistical analysis of the results of 309 questionnaires by using t-distribution curve.On the basis of the maximum blasting vibration velocity,the blasting vibration reduction control technology for different sur-rounding rocks is put forward through theoretical derivation and regression fitting.The research results show that,considering the two major influence factors,namely,the safety of surface building structure and the psychological tolerance of people to blasting,the blasting vibration velocity in urban tunnel construction should be less than 1.11 cm/s;from the point of view of people′s psychological tolerance to blasting,the minimum safety distances for blasting vibration in surrounding rocks with various grades should be 35.9 m(GradeⅤ),35.1 m(GradeⅣ)and 45.6 m(GradeⅢ)respectively,when the explosive charge is in the range of 24.63~34.5 kg.

关 键 词：城市隧道 心理影响 爆破振动 监测 

分 类 号：U455.6[建筑科学—桥梁与隧道工程]