爆破荷载作用下隧道的动态响应与抗爆分析

英文篇名：Dynamic response and blast-resistance analysis of a tunnel subjected to blast loading
中文刊名：浙江大学学报(工学版)
英文刊名：Journal of Zhejiang University(Engineering Science)
作者：刘国华 ; 王振宇
英文作者：LIU Guo-hua ; WANG Zhen-yu (College of Civil Engineering and Architecture ; Zhejiang University ; Hangzhou 310027 ; China)
中文关键词：隧道 ; 爆破 ; 动力分析 ; 加权双剪强度准则 ; 抗爆分析
英文关键词：tunnel ; blasting ; dynamic analysis ; weighted twin-shear strength theory ; blast-resistance analysis
出版日期：2004-02-29
机构：浙江大学建筑工程学院,浙江大学建筑工程学院浙江杭州310027 ,浙江杭州310027
年：2004
期：02
出版单位：浙江大学学报(工学版)

摘要

超近距离爆破会对已有隧道造成不利的影响,是亟待解决的工程实际问题.基于爆破动力分析和加权双剪强度准则,提出了邻近爆破安全评估和爆破方案优选方法.由于隧道的形状、岩性及其初始应力状态的不同,结构不同部位的动态响应有较大的差别,应分别评价其危险性.借助爆破荷载作用下隧道的动力分析,不仅可以得到隧道的动态响应历程和频谱特征,而且为动静应力场联合分析和安全性判断提供了依据.工程实例应用表明,根据上述理论和分析方法所制定的控制爆破方案能够取得良好的效果.
The blast with a short distance is harmful to an existing tunnel, which is the key problem in the practical projects. Dynamic analysis and weighted twin-shear strength theory were applied to develop appropriate methods for evaluating the tunnel's safety and to devise an optimal blasting scheme for nearby blasting in this paper. Because the structural response differs with differing tunnel shape, wall rock properties, and initial stress state, the safety of the tunnel in different location should be estimated respectively. Blasting dynamic analysis results are used to plot the time-course curves and the frequency spectrum of the structural response. Finally, a case study is presented to illustrate the rational benefits of the above theory and method.

引文

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