【摘要】 规划建设的郑州地铁3号线1期工程穿过郑州二七塔临近区域,分析地铁列车振动对二七塔的动力影响十分必要。基于《古建筑防工业振动技术规范》,预测分析了15m、20 m和25 m 3种埋深下地铁列车振动对二七塔的影响。结果表明,3种埋深条件下地铁振动引发的二七塔承重结构最大速度响应分别达到0.907 mm/s、0.747 mm/s和0.623 mm/s,超过国家重点保护文物承重结构的容许振动速度。为确保二七塔建筑结构的安全,建议郑州地铁3号线1期工程在建设过程中,在二七塔临近区域采用不低于25 m的埋深并设置钢弹簧浮置板道床来减弱振动的影响。更多还原

【Abstract】 The planned Zhengzhou metro Line 3 will pass through the area very close to the 2·7 Memorial Tower.To protect the tower,it is necessary to make an assessment of the metro train-induced vibration.In this paper,based on the Technical Specifications for Historic Buildings Protection,the train-induced vibration influences on the tower under the depth of 15 m,20 m and 25 m are predicted.The results show that the maximum vibration velocity values of the load bearing structure of 2·7 Tower responded to the train-induced vibration are 0.907 mm/s,0.747 mm/s and 0.623 mm/s respectively,which have exceeded the permitted vibration velocity for the load bearing structure of national key cultural relics in the Technical Specifications.So in the construction of Zhengzhou metro Line 3,the steel-spring floating slab track bed must be installed in the tunnel of 25 m underground,so as to reduce the vibration in the area near 2·7 Memorial Tower更多还原