玉象隧道爆破振动监测与分析  

Monitoring and analysis of blasting vibration of Yuxiang tunnel

作　　者：江杰[1,2,3] 蒲鸥 刘刚伯 欧孝夺[1,2] 谢规球 

机构地区：[1]广西大学土木建筑工程学院,广西南宁530004 [2]广西大学工程防灾与结构安全重点实验室,广西南宁530004 [3]桂林理工大学广西岩土力学与工程重点实验室,广西桂林541004 [4]中交第四公路工程局有限公司,北京100022

出　　处：《广西大学学报（自然科学版）》2016年第6期1751-1755,共5页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(51568006;41372361);广西重点实验室系统研究项目(2016ZDX11);广西岩土力学与工程重点实验室资助课题(14-KF-03)

摘　　要：现行公路隧道受到偏压和浅埋的影响较大,在围岩稳定性不高的情况下,其爆破施工会对隧道产生一定影响。广西玉象隧道围岩级别为V级,从洞口延伸至洞内120 m都属于偏压浅埋段,文中通过对该隧道浅埋段衬砌结构振速进行监测,并根据监测数据进行回归分析得到拟合公式,给出测试条件下的爆破参数建议值,同时,通过拟合公式预测距离掌子面较近衬砌结构的振速,并根据结果对爆破方案进行动态调整,以保障施工的安全。研究方法和结果可对类似工程提供参考。At present,highway tunnels always experience a gradual influence from the surrounding rock due to unsymmetrical pressure and shallow buried-depth. Under the situation of low stability of surrounding rock,the influence cannot be ignored if the tunnels need to be constructed with the method of blasting. The analysis of blasting vibration is based on Guangxi Yu-Xiang tunnel＇s monitoring data. The tunnel＇s surrounding rock level is V,and the 120 m section from entrance to interior of the tunnel is shallow buried and under unsymmetrical pressure. By monitoring the vibration velocity of lining structure of the section,a formula is fitted from the monitoring data,which gives recommended value for blasting in the tunnel. According to the regression formula,the peak vibration ve-locity of the lining structure close to the tunnel face is predicted,and whether the velocity is in a safe range is assessed. With the method,the blasting construction program is put into dynamic adjustment. This method gives a reference for the scheme adjustment of the tunnel excavation and optimization of blasting design parameters.

关 键 词：隧道爆破 爆破振动监测 偏压浅埋隧道 回归分析 

分 类 号：U452[建筑科学—桥梁与隧道工程]