摘要
在确定爆破振动产生的质点最大振速时常采用萨道夫斯基经验公式,式中系数K,α常用工程类比来选取,误差较大。一些研究者认为该公式没有反映高程对爆破效应的影响,因而提出了修正公式。但考虑到系数K,α原本就是与爆破场地条件、地质条件有关的系数,高程的影响应已包括在内,故对萨道夫斯基公式进行此种修正是否合理,有待于进一步研究。基于这一思想,通过现场实测来探寻高差变化对K,α值影响的基本规律,对不同高差时的K,α值进行了回归分析,结果表明,不同岩性时,K,α值随高差的变化是不同的。因此,在实际工程中,根据高程与K,α值的关系先确定K,α值,然后再应用萨道夫斯基经验公式,即可对爆破振动速度进行较为准确的预测。
Sodev’s empirical formula is often used to determine the vibration velocity of blasting,in which coefficients of K and α are often defined by engineering analogism,so the error is large.Several modified equations are proposed by some researchers for lack of altitude effect in the Sodev’s formula,but the modified equations are complex and unfit for practical engineering.In addition,K and α are coefficients associated with the situations of site and geology,including altitude effect.Therefore,the modification is unnecessary.Based on this idea,the rules between K,α and altitude are studied by measurement in site and regression analysis of K,α at different altitudes.The results show that the altitude effects of K and α are different for different lithologic characters,so the rational vibration velocity can be got by a simple way,that is,the values of K,α should be defined by the rules between K,α and altitude firstly,then,the Sodev’s formula is used to gain the vibration velocity.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2010年第4期619-623,共5页
Chinese Journal of Geotechnical Engineering
基金
国家863计划项目(2007AA06Z132)
关键词
爆破振动效应
振速
高程效应
高差
seismic effect of blasting
vibration velocity
altitude effect
difference in elevation
