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强夯法加固地基由于施工程序简单,工程造价低,在世界范围内得到广泛应用。近些年,强夯引发的地面振动对周围建筑物的影响不断被重视。文章基于强夯法地基加固过程中现场采集的207组振动记录,研究了强夯引发的地振动竖直方向和水平方向振动峰值(振动峰值加速度PGA和振动峰值速度PGV)随振源距的衰减规律,研究表明PGA和PGV的衰减符合指数衰减规律。计算了工程场地的振动能级,参照《城市区域环境振动标准》(GB10070-88)对工程场地进行了环境评价,表明强夯引起的地面振动等级远大于现有的规定值,强夯引起的周围地面振动问题应该给予重视。
Dynamic consolidation method to reinforce the ground due to the simple construction process, project cost is low, widely used in the world. In recent years, the impact of ground vibrations caused by dynamic compaction on the surrounding buildings is constantly being taken seriously. In this paper, based on 207 sets of vibration records collected during the foundation consolidation by dynamic consolidation method, the vertical and horizontal vibration peaks (vibration peak acceleration PGA and vibration peak velocity PGV) The results show that the attenuation of PGA and PGV accords with exponential decay law. The vibration level of the project site was calculated. The environmental assessment of the project site was conducted according to “Environmental Vibration Standards for Urban Area” (GB10070-88), which showed that the ground vibration level caused by the dynamic compaction was much larger than the existing stipulated value. Vibration around the ground should be given attention.