森林工程2025，Vol.41Issue(3)：636-645,10.DOI:10.7525/j.issn.1006-8023.2025.03.020
不同因素下隧道初期支护爆破动力响应特性
Dynamic Response Characteristics of Tunnel Initial Support Blasting under Different Factors
摘要
Abstract
The dynamic response characteristics of the initial support under blasting will affect the construction safety and schedule.In order to study the dynamic response characteristics of tunnel initial support under different factors,combined with the tunnel blasting project of forest farm,the vibration velocity and stress distribution laws of tunnel ini-tial support under the influence of age,footage length and detonation time interval were analyzed by combining field monitoring and numerical simulation,and Morris screening method was introduced to analyze the influence degree of each factor.The results show that the peak vibration velocity of the initial support presents Vy>Vz>Vx rule under different penetration length,age and detonation time interval,and the tensile stress is much larger than the shear stress.The vi-bration velocity and stress of the initial support change sharply during the age of 1-3 d,and gradually tend to be flat after 7 days,the attenuation rate of the x-axis is the largest,followed by the z-axis,and the y-axis is the smallest.With the in-crease of footage length,the growth rate of particle vibration velocity presents a rule of the y-axis is the largest,followed by the x-axis and the z-axis.When the detonation time interval is 5ms,the stress waves cancel each other and the vibra-tion velocity decreases.The degree of influence of the three factors on the dynamic response characteristics of structural blasting is in the order of footage length,age,and blasting interval.The research results can provide reference for simi-lar tunnel blasting projects.关键词
公路隧道/爆破/初期支护/动态响应/数值模拟Key words
Highway tunnel/blasting/initial support/dynamic response/numerical simulation分类
交通工程引用本文复制引用
李时林,何如,徐昊,孙仁祥,刘喜..不同因素下隧道初期支护爆破动力响应特性[J].森林工程,2025,41(3):636-645,10.基金项目
江西省地质环境与地下空间工程研究中心开放基金项目(JXDHJJ2022-005) （JXDHJJ2022-005）
国家自然科学基金项目(52278397) （52278397）
东华理工大学博士科研启动基金项目(DHBK2019236). （DHBK2019236）
