82
DOI:10.7672/sgjs2017110082
施工技术
CONSTRUCTION TECHNOLOGY
2017年6月上第46卷第11期
隧道近距下穿老旧建筑物爆破振动监测
及减振技术研究
曹杨1,2，王旭春，余志伟，于云龙1，李伟
（1.青岛理工大学土木工程学院，山东青岛266033;2.青建集团股份公司，山东青岛266071）
[摘要】以成渝客运专线新红岩隧道为工程背景，对隧道近距离下穿老旧建筑物的爆破振动监测方法及减振技术进行了研究。通过对老旧建筑物的爆破振速进行实时监测和数据回归分析，拟合出萨道夫斯基公式中的K，α值，优化后续隧道爆破施工。相对于非电雷管，在装药量不变的情况下，采用电子雷管掏槽，振速降低50%以上，在振速、爆心距、单段药量相同的情况下，采用电子雷管掏槽，施工进尺增大70%。从布置减振孔、装药结构、微差延退爆破3个方面提出了爆破振动控制技术，实现控制爆破振动速度在老旧建筑物的安全振速范围以内，确保了老旧建筑物的安全
【关键词］隧道工程；爆破：老旧建筑物；监测：减据
［中图分类号］U456.3
【文献标识码］A
［文章编号】1002-8498(2017)11-0082-04
BlastingVibrationMonitoringandReductionTechnology of TunnelUnder-passingAgingBuildingsinaShortDistance
CAO Yang',2,WANG Xuchun',YU Zhiwei',YU Yunlong',LI Wei
(1. School of Ciail Engineering, Qingdao Unirersity of Technology, Qingdao, Shandong 266033, China;
2. Qingdao Construction Group,Qingdao, Shandong 266071, China)
Abstract: Research of the tunnel under-passing aging buildings in a short distance blasting vibration characteristics monitoring and vibration reduction technology is based on the engineering background of New Hongyan Tunnel of Chengdu-Chongqing high-speed railway. Through real-time monitoring of blasting vibration velocity of aging buildings and regression analysis, fitting K, α value Sadaovsk Formula to optimize the subsequent blast tunnel construction, which are used in subsequent blasting construction Relative to non-electronic detonators,the use of electronic detonator cutting in the case of the same amount of charge, the vibration velocity was reduced by 50% or more, the use of electronic detonator cutting in the vibration speed, the heart burst distance, single-dose the same circumstances, theoretical footage increased by 70% . The controlling technology measures of blasting vibration were put forward from the arranged damping hole, the undercut form, the millisecond blasting, so as to control the vibration velocity of ground within safety range in the process of this aging buildings, to make sure the safety of aging buildings of construction segment.
Key words:tunnels;blasting; aging buildings; monitoring; vibration reduction
0引言
本文依托成渝客运专线新红岩隧道，主要研究了隧道近距离下穿老旧建筑物的爆破振动监测方法，并对爆破振动进行实时监测，对采集的数据进行分析，通过回归分析拟合出K和α值，在此基础
[作者简介］曹杨，博士研究生，E-mail：cy@cnqe.com【收稿日期]月方数据；【修订日期】2017-04-28
上提出隧道爆破减振技术，以减少隧道施工爆破对地表环境和周围建（构）筑物造成的振动破坏。
1工程概况及爆破振动监测 1.1工程概况
成渝客运专线新红岩隧道位于沙坪坝一菜园坝区间，隧道总长度为6699m，隧道浅埋段主要位于新红岩隧道进口处和出口处，其里程为GDK297+