摘要
为定量分析水工隧洞开挖过程中爆破振动对既有建筑物的安全性影响,本文基于某地区水工隧洞建设工程,通过爆破振动频率与振动速度探究其亭下支洞与状元香支洞爆破时对既有建筑物的安全性影响。试验表明:当限定装药量9.6 kg,土坯房和一般砖房的安全距离分别为180 m与60 m;一般房屋建筑物的频率低于10 Hz,而爆破振动引起的频率主要为10~50 Hz,故爆破振动不会引起房屋产生“共振”现象;振动速度受临近建筑物位置、爆破点和爆破距离影响。
In order to quantitatively analyze the impact of blasting vibration on the safety of existing buildings during the excavation of hydraulic tunnels,this paper is based on the construction of hydraulic tunnels in a certain area.Through the blasting vibration frequency and vibration speed,this paper explores the safety impact of the blasting of the lower branch tunnel of the pavilion and the zhuangyuanxiang branch tunnel on the existing buildings.The test shows that:when the limited charge is 9.6 kg,the safe distances of adobe houses and general brick houses are 180 m and 60 m respectively.The frequency of general houses and buildings is lower than10 Hz,and the frequency caused by blasting vibration is mainly 10-50 Hz.Therefore,the blasting vibration will not cause the“resonance”phenomenon of the house.The vibration speed is affected by the location of the adjacent building,the blasting point and the blasting distance.
作者
余玉龙
YU Yulong(Wenzhou wWater Resources and Electric Power Survey and Design Institute CO.LTD.,Wenzhou 325000,China)
出处
《河南水利与南水北调》
2022年第7期60-61,共2页
Henan Water Resources & South-to-North Water Diversion
关键词
隧洞开挖
爆破振动
振动速度
安全性分析
tunnel excavation
blasting vibration
vibration velocity
safety analysis
作者简介
余玉龙(1979.04—),男,高级工程师,主要从事水利规划与设计工作。
