岩土力学2011，Vol.32Issue(2)：537-541,5.
近距离交叉隧洞爆破对既有隧道的振动影响
Vibration effects on existing tunnel induced by blasting of an adjacent cross tunnel
叶培旭 1杨新安 1凌保林 1张业炜1
作者信息
- 1. 同济大学,城市轨道与铁道工程系,上海,200092
- 折叠
摘要
Abstract
Based on the engineering that Nanshanxia Tunnel down-traversing Qiancangshan Tunnel of Wen-Fu Passenger Dedicated Line, the vibration effects on the existing tunnel caused by blasting of an adjacent cross tunnel have been monitored.The results of the tests show that: the position of blasting surface affects velocity distribution of the cross-section of existing tunnel; when the distance between vibration source and measuring points is more than 30 m, the main influence factor of vibration is distance; while it is less than 30 m, the main factors are the amount of dynamite and distance; the harder and more complete the rock is, the slower the attenuation of the propagation of blasting vibration wave is.Measures such as pilot tunnel blasting in advance of smooth blasting; pilot tunnel blasting that the initiation of cutting holes, periphery holes and bottom holes are separated; and controlling maximum explosive volume for single segment can weaken the impact of blasting vibration effectively and control the vibration effects on Qiancangshan Tunnel; it can be a reference for similar projects.关键词
铁路隧道/交叉隧道/爆破振动/振动速度/监测分类
交通工程引用本文复制引用
叶培旭,杨新安,凌保林,张业炜..近距离交叉隧洞爆破对既有隧道的振动影响[J].岩土力学,2011,32(2):537-541,5.
