隧道爆破药距比对建筑振动响应的研究

Study of tunnel blasting explosive payload distance ratios on building vibration response

针对隧道爆破振动对周边建筑物造成的安全威胁,结合青岛市团岛二路15号楼现场实际情况,利用ANSYS/LS-DYNA有限元软件建立了三维数值模型,研究了药距比系数对砌体结构爆破振动响应规律的影响。结果表明:当药距比系数为1.19时砌体结构顶层合振速峰值呈现绝对降低现象;当药距比系数为3.23,14.97,32.26时砌体结构顶层合振速峰值呈现相对放大现象,砌体结构顶层振动响应并不呈现单一规律。

Aiming at the safety threat to the surrounding buildings caused by tunnel blasting vibration,combined with the actual situation of the site of Building 15,TuanDao No.2 Road,Qingdao City,a three-dimensional numerical model was established by using ANSYS/LS-DYNA finite element software,and the influence of the coefficient of the drug spacing ratio on the response law of the blasting vibration of the masonry structure was investigated.The results show that:the peak value of the combined vibration velocity of the top layer of masonry structure shows an absolute decrease when the coefficient of the drug pitch ratio is 1.19;the peak value of the combined vibration velocity of the top layer of masonry structure shows a relative amplification when the coefficients of the drug pitch ratio are 3.23,14.97 and 32.26,and the vibration response of the top layer of the masonry structure does not show a single law.