摘要
市政复线隧道与既有隧道受地形条件限制,在规划设计时两者的净间距较小,施工过程中新建隧道开挖爆破产生的爆破振动,不可避免地会对既有隧道的结构或运营安全造成一定影响,极有可能导致既有隧道出现结构破坏、衬砌开裂、渗水等不良现象;同时,因净距过小,以及传统的减震爆破一般采用“多打眼、少装药”的方式进行施工,新建隧道的施工安全及施工进度也因此受到极大的制约。
Municipal multi-track tunnel and existing tunnel are limited by topographic conditions,and the net distance between them is small in planning and design,in the construction process of new tunnel excavation blasting of blasting vibration,the inevitable will cause a certain impact on the existing tunnel structure or operation safety,is likely to lead to the existing tunnel structure damage,lining crack,seepage and other undesirable phenomena;at the same time,because the net distance is too small,and the traditional shock absorption blasting generally adopts the method of“more holes,less charge”for construction,construction safety and construction progress of the new tunnel is also greatly restricted.
作者
钱勇
秦亮
QIAN Yong;QIN Liang(Zunyi City Construction Project Quality and Safety Service Station,Zunyi Guizhou 563000,China;China Railway Tunnel Group Co.,Ltd.,Weinan Shaanxi 715300,China)
出处
《工程质量》
2019年第7期56-61,共6页
Construction Quality
关键词
爆破
振动
监测
控制
blasting
vibration
monitoring
control
作者简介
钱勇,男,工程师,研究方向为建设工程质量安全监管。
