基于损伤累积的大跨度隧道(硐库)爆破振动传播规律  

Blasting Vibration Propagation of Long-span Tunnel (Adit) Based on Damage Accumulation

作　　者：杨小林 朱思源 褚怀保[1] 刘永胜 任志强 陈真[1] YANG Xiao-lin;ZHU Si-yuan;CHU Huai-bao;LIU Yong-sheng;REN Zhi-qiang;CHEN Zhen(College of Civil Engineering,Henan Polytechnic University,Jiaozuo 454000,China;Survey,Design and Research Institute of China Railway Tunnel Group Co.Ltd.,Guangzhou 511458,China)

机构地区：[1]河南理工大学土木工程学院,焦作454000 [2]中铁隧道局集团有限公司勘察设计研究院,广州511458

出　　处：《科学技术与工程》2021年第10期3958-3963,共6页Science Technology and Engineering

基　　金：国家自然科学基金(51874123)。

摘　　要：为研究损伤累积效应对隧道内爆破振动波传播与衰减规律的影响,利用萨道夫斯基公式对某大跨硐库施工过程中测得的爆破振动波结果进行拟合分析。结果表明:在单次爆破作用下,爆破振速与主频均随测点与爆破中心距离的增大而减小;在多次爆破作用影响下,测点爆破振速与主频均随爆破次数增加不断衰减;随着爆破次数的增加,衰减系数(α)缓慢增长,场地系数(K)逐渐衰减。现场爆破振动波的变化规律与室内试验结果相一致,且质点振动主频与峰值振速在变化规律方面存在较高对应关系。在进行振动波传播与衰减规律研究、爆破振动安全标准制定和振动危害效应评价时,应考虑损伤累积效应的影响。In order to study the influence of damage accumulation effect on the propagation and attenuation of blasting vibration wave in tunnel, the results of blasting vibration measured in the construction process of a large cross-adit storehouse were fitted and analyzed by using the Sodev’s formula. The results show that under the single blasting action, the blasting vibration velocity and main frequency both decrease with the increase of distance between measuring point and blasting center. Under the influence of multiple blasting effects, the vibration velocity and main frequency both decrease gradually with the increase of blasting times. With the increase of blasting times, the vibration attenuation coefficient α increases slowly, while the value of K decreases gradually. The variation law of blasting vibration wave in field is consistent with the result of laboratory test, and there is a high correspondence between the main frequency and the peak vibration velocity. The cumulative effect of damage should be fully considered in the study of velocity propagation law of vibration, in the formulation of blasting vibration safety standard and in the evaluation of blasting vibration hazard effect.

关 键 词：损伤累积 爆破振动 大跨度隧道(硐库) 传播与衰减规律 现场监测 

分 类 号：TD235.12[矿业工程—矿井建设]