建筑结构对隧道爆破的应力响应与稳定性研究

STUDIES ON GROUND BUILDING STRUCTURES' STRESS RESPONSE TO TUNNEL BLASTING AND THEIR STABILITY

以某隧道工程掘进开挖爆破的震动安全监测项目为依托,对隧道上方民用建筑物的应力响应和稳定性进行研究。选取爆源位于建筑物下方边角处和中心处等不同位置时,运用三维数值模拟研究该建筑各结构构件基础、梁、板、柱、墙体等部位的震动应力时程分析、动力响应分布规律及稳定性,为控制隧道开挖爆破对地面建筑结构的危害提供基础数据,提出对建筑物进行重点构件部位的安全监测或采取针对性加固措施。现场调研验证了的建筑破坏情况与数值模拟结果基本一致。

Based on the safety monitoring of tunnel excavation, research on the stress response and stability of civil buildings above the tunnel. When the explosion source is located at the bottom of the building and the center of the comer, with three-dimensional modeling, analyses vibration stress time history analysis, the distribution regularity of dynamic response and stability, so that the base data are provided for controlling the harm effect of blasting vibration on ground buildings, put forward views for key parts of the safety monitoring of buildings or to take corresponding reinforcement measures. The results from modeling is verified by site investigation.