近接文保区隧道施工爆破振动分析

Analysis of Blasting Vibration during Tunnel Construction Near the Cultural Heritage Zone

本文首先对爆破振动理论进行了介绍,并分析了爆破振动时影响文保建筑物损伤的因素,最终对能量判据的参数等进行了分析。结果表明:①场地土特性与地貌特征等直接影响爆破振动时基础损害的大小及破坏形式,振速峰值对爆破振动的破坏程度起着决定性作用。②确定建(构)筑物响应能量的破坏阈值与安全标准值是建立响应能量安全标准时的基本方法。③爆破振动响应能量判据的破坏阈值和安全标准,必须基于大量爆破振动实测数据,以及在各类文保建筑物受损情况调查统计的基础上,才能最终确立。

In this paper,firstly,the theory of blasting vibration is introduced,and the factors affecting the damage of Wenbao building during blasting vibration are analyzed,and finally the parameters of energy criterion are analyzed.The results show that:①The soil characteristics and geomorphological characteristics of the site directly affect the magnitude and failure form of foundation damage during blasting vibration,and the peak velocity plays a decisive role in the damage degree of blasting vibration.②Determining the failure threshold and safety standard value of response energy of buildings is the basic method to establish the safety standard of response energy.③The failure threshold and safety standard of blasting vibration response energy criterion can only be established on the basis of a large number of blasting vibration measured data and the investigation and statistics of damage of all kinds of cultural protection buildings.