采用动力学分析方法结合拉氏变换及其逆变换,构建了爆破振动下地表建筑物振动位移解析表达式.以重庆市轨道交通一号线施工为例,计算发现爆破施工中隧道两侧余家湾水库附近房屋建筑发生振动位移大小达4 cm,处于非稳定状态,与实际较吻合.分析讨论了爆破药量、振动波主频率和建筑物墙体刚度三因素对振动位移的影响,发现在爆破药量和振动波主频率增加的情况下,建筑物振动位移呈增加趋势,但爆破药量对建筑物振动位移影响较振动波主频率大.建筑物墙体刚度能有效抑制振动位移的增加,但只在一定刚度范围内效果明显.%The analytical expression of surface building vibration displacement was established under blasting vi-bration by using dynamic analysis methods and Laplace transform. Taking Chongqing Rail Transit Line 1 as an example, the calculation shows that the vibration displacement of buildings near Yujiawan Reservoir reaches 4cm under blast working, which, in an unsteady state, coincides with the actual situation. The effects of blasting dosage, main frequency of vibration wave and building's stiffness on vibration displacement were discussed and the research results show that with the increase of blasting dosage and main frequency of vibration, building vi-bration displacement also increases; however, the effect of blasting dosage on vibration displacement is bigger than that of main frequency of vibration wave; the building's stiffness can, within a certain range, control vibra-tion displacement effectively.
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