CAJ | 학술논문

以某隧道爆破施工为背景,运用有限元程序分析了爆破震动高程放大系数K′与爆心距R的水平投影S比值(R/S)的变化特征,由此确定了考虑高程放大效应的爆破震动衰减规律.数值模拟的计算结果指导和优化了爆破施工,现场实测也表明,数值模拟的误差在工程允许的范围内,有助于城市复杂环境下爆破震动效应的预测以及爆破震动放大效应的理论研究.
이모수도폭파시공위배경,운용유한원정서분석료폭파진동고정방대계수K′여폭심거R적수평투영S비치(R/S)적변화특정,유차학정료고필고정방대효응적폭파진동쇠감규률.수치모의적계산결과지도화우화료폭파시공,현장실측야표명,수치모의적오차재공정윤허적범위내,유조우성시복잡배경하폭파진동효응적예측이급폭파진동방대효응적이론연구.
By taking a shallow tunnel as the research object,the correlation between K′(the amplification effect coefficient of blasting vibration)and ratio R/S(R is the distance to blasting center,and S is the length of horizontal projection of the distance)was simulated numerically by using a dynamic finite element method,and the blasting vibration attenuation law considering the amplification effect was obtained.The result of the study was used to optimize the support parameters and provide guidance for construction.It is observed that numerical simulation results,on the whole,agree well with those of the field tests.It has some practical significance to the forecast of vibration effect and the theoretical study on amplification effect of vibration for blasting project under complicated condition of city.