中国铁道科学2012，Vol.33Issue(z1)：104-110,7.DOI:10.3969/j.issn.1001-4632.2012.S1.18
新建上跨隧道爆破施工对既有隧道影响的数值模拟及工程对策
Numerical Simulation of the Influences of New Over-Crossing Tunnel's Blasting Construction on Existing Tunnel and Engineering Countermeasures
卢裕杰 1谢勇涛 1丁祥1
作者信息
- 1. 中铁第五勘察设计院集团有限公司,北京102600
- 折叠
摘要
Abstract
According to dynamic time-history analysis theory, 3D finite element numerical simulation was carried through on the blasting construction engineering of new over-crossing tunnel and its influence on existing tunnel was researched by using the Geotechnical and Tunnel analysis System (GTS). Results show that the section of the intersection of existing tunnel and new over-crossing tunnel is most affected by vertical vibration. With the increase of the horizontal distance away from shot point, the vibration velocity in the vertical direction decreases gradually while the vibration velocity in the horizontal direction increases first and then decreases. The influence of the blasting construction is greater on the existing tunnel within 25 m horizontal distance away from intersection, and the influence is very little when the distance exceeds 45 m. The blasting footage must be controlled within 1. 5 m and some corresponding engineering measures are needed to ensure the safety of existing tunnel. During the blasting construction of new tunnel, the monitoring measurement is needed on the vertical vibration velocity of the vault between K201+065 and K201 + 165 sections of the existing tunnel.关键词
既有隧道/新建隧道/爆破施工/振动速度/爆破进尺Key words
Existing tunnel/ New tunnel/ Blasting construction/ Vibration velocity/ Blasting footage分类
交通工程引用本文复制引用
卢裕杰,谢勇涛,丁祥..新建上跨隧道爆破施工对既有隧道影响的数值模拟及工程对策[J].中国铁道科学,2012,33(z1):104-110,7.
