铁道科学与工程学报2017，Vol.14Issue(3)：568-574,7.
大跨度小净距隧道爆破振动影响数值模拟分析
Numerical simulation of large span and small spacing neighborhood tunnel blasting vibration effect
摘要
Abstract
Based on the actual situation of Wenzhou beltway Pingshan small spacing tunnel section, the interaction problem under blast loading in small spacing tunnel section was studies with the numerical simulation methods. The results showed that: the side wall of the ahead tunnel that near the blasting should be focused on monitoring during the blasting construction of the underwent tunnel; With three lanes large section and small distance tunnel hole, when the explosion of excavation of after hole is 30 kg, the potential scope of tensile fracture in secondary lining of leading hole is from ten meters after excavation. In order to ensure the safety of the ahead tunnel's secondary lining structure, the construction of the ahead tunnel's secondary lining structure should lags behind the tunnel face construction of the ahead tunnel for at least 10 m distance. The conclusions could provide some reference for the blasting design, construction and on-site monitoring and measurement of similar small spacing tunnel section.关键词
小净距隧道/钻爆施工/爆破振动/动力响应Key words
small spacing tunnel/drill-blasting construction/blasting vibration/dynamic response分类
建筑与水利引用本文复制引用
杜峰,闫军,张学民,黄勤伟,张庆彬,欧雪峰..大跨度小净距隧道爆破振动影响数值模拟分析[J].铁道科学与工程学报,2017,14(3):568-574,7.基金项目
国家自然科学基金资助项目(53178505, 51408067) （53178505, 51408067）
"十二五"国家科技支撑计划课题资助项目(2012BAK24802) （2012BAK24802）
