江汉大学学报（自然科学版）2026，Vol.54Issue(2)：18-25,8.DOI:10.16389/j.cnki.cn42-1737/n.2026.02.002
高速跨线天桥爆破拆除预处理过程桥梁结构安全性影响分析
Analysis of the Impact of Pre-treatment Process on Structural Safety during Blasting Demolition of a Highway Overpass Bridge
摘要
Abstract
Ensuring the stability of the structure after pre-borehole drilling is a common challenge in controlled blasting demolition.This is particularly crucial for overpass bridge demolition,where traffic flow on the underlying roads typically must remain uninterrupted during drilling operations.Therefore,investigating the stability of pre-weakened structures is of significant importance.Based on a case of highway overpass bridge demolition in China,this study employed the finite element software MIDAS to analyze whether the bearing capacity of pre-drilled arch ribs,diagonal braces,and deck positions could satisfy the external load requirements.The results showed that after considering the structural weakening caused by the blast-induced cuts at these respective locations,the minimum safety margin under the most unfavorable load combination during ultimate limit state verification was 33.4%,69.2%,and 7.0%,respectively.These values confirm that the bearing capacity requirements were met.The safety impact analysis conducted helped ensure the successful completion of the bridge blasting demolition.The findings can serve as a valuable reference for similar engineering projects.关键词
跨线天桥/拆除爆破/安全分析/MIDASKey words
overpass bridge/demolition blasting/safety analysis/MIDAS software分类
交通工程引用本文复制引用
张淑童,涂圣武,谢全民,汪远远..高速跨线天桥爆破拆除预处理过程桥梁结构安全性影响分析[J].江汉大学学报（自然科学版）,2026,54(2):18-25,8.基金项目
湖北(武汉)爆炸与爆破研究院博士科研启动基金项目(PBSKL-2024-QD-08) （武汉）
