地铁紧邻既有建筑的单排桩隔振正交试验研究

发布时间：2018-03-26 06:36

本文选题：地铁　切入点：减隔振　出处：《铁道标准设计》2017年12期

【摘要】：为了研究地铁紧邻既有建筑物时单排桩对于地铁产生的振动波能的减隔振效果及其影响因素,通过进行1g条件下的单排桩减隔振室内模型试验,分析在地铁振动激励作用下的建筑物振动形态,并在同时考虑振源深度、排桩位置、桩间距及桩长4个因素的情况下设计了相关正交实验,提出相关优化方案。分析结果表明:建筑物在地铁振动激励作用下,各楼层振动加速度级的大小呈现出波浪形的振动形态;随激振频率的增加,建筑物各测点振动加速度级总体表现出减小的趋势;单排桩在紧邻既有建筑的地铁隔振方面具有明显的减隔振效果,预期减振幅度可达13.59%;就影响减隔振效果的各因素而言,非排桩几何因素(地铁埋深\排桩位置)对减隔振效果影响较大,而排桩自身几何因素(桩间距\桩长)对于减隔振效果的影响则不如前者。
[Abstract]:In order to study the vibration isolation effect of single row piles on the vibration wave energy generated by subway when adjacent to existing buildings and its influencing factors, the indoor model test of single row pile vibration isolation was carried out under the condition of 1 g. In this paper, the vibration form of the building under the vibration excitation of subway is analyzed, and the orthogonal experiment is designed under the consideration of four factors: the depth of the vibration source, the position of the pile row, the distance between the piles and the length of the pile. The analysis results show that the vibration acceleration level of each floor presents the wave shape under the action of subway vibration excitation, and the vibration frequency increases with the increase of the vibration frequency. The vibration acceleration level of each measuring point of the building generally shows a decreasing trend; the single row pile has obvious vibration isolation effect in the subway adjacent to the existing building, and the range of vibration reduction is expected to reach 13.590.As far as the factors affecting the vibration isolation effect are concerned, Geometric factors of non-row piles (buried depth of subway) have great influence on vibration isolation effect, while geometric factors of row piles (pile spacing / pile length) have less effect on vibration isolation effect than the former.
【作者单位】：河北建筑工程学院土木工程学院;河北省土木工程诊断改造与抗灾重点实验室;
【基金】：河北省青年拔尖人才计划项目(BJ2016018) 河北建筑工程学院研究生创新基金项目(XB201725)
【分类号】：TU352.1

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