基坑爆破施工减振孔减振效应现场试验研究?
DOI:
作者:
作者单位:

1.深圳大学;2.中铁二十五局集团有限公司;3.深圳市市政设计院有限公司

作者简介:

通讯作者:

中图分类号:

TU375.4

基金项目:

广东省“珠江计划”引进创新创业团队项目(2019ZT08G315);国家自然科学基金面上项目(No. 51974197);深圳市科创委基础研究面上项目(JCYJ20210324093402006)


Field test study on vibration reduction effect of blasting barrier hole during excavation of foundation pit
Author:
Affiliation:

1.Shenzhen University;2.China Railway 25th Bureau Group Co., Ltd.;3.Shenzhen Municipal Design and Research Institute

Fund Project:

Program for Guangdong Introducing Innovative and Entrepreneurial Teams (No.2019ZT08G315); National Natural Science Foundation of China (No. 51974197) ; Basic Research Project of Shenzhen Science and Technology Innovation Commission (No. JCYJ20210324093402006).

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    为有效降低爆破施工对邻近建(构)筑物造成的动态扰动,以深圳地铁16号线1号综合井基坑爆破工程为依托,开展了减振孔减振效应的现场试验研究。通过对不同参数减振孔条件下地表振动的实时监测,研究了减振孔对地表峰值质点振动速度(PPV)和主振频率的影响,分析了减振孔参数对减振效应的影响。研究结果表明:随着减振孔直径的增加,水平径向隔振率与水平切向隔振率先增加后减小,竖直方向隔振率整体上逐渐增加,基于合速度的隔振率呈现显著增大的趋势;随着减振孔排间距的增加,减振孔的隔振率先显著减小后逐渐趋于稳定;当减振孔内充填水时,随着减振孔充填度的增加,水平径向隔振率逐渐减小,水平切向隔振率与竖直方向隔振率先增加后减小,基于合速度的隔振率先增加后逐渐减小。

    Abstract:

    In order to reduce the dynamic disturbance of adjacent structures caused by blasting construction of foundation pit by using blasting, field test to study the vibration reduction law of the blasting barrier holes was conducted relying on the blasting construction project of foundation pit of No. 1 comprehensive well of Shenzhen Metro Line 16. Based on monitoring of the vibration of ground under the condition of different blasting barrier hole parameters, the influence of blasting barrier hole on peak velocity and dominant frequency of particle vibration on the ground and the influence of parameters of blasting barrier hole on its vibration barrier effect was analyzed. And the following conclusions were draw. Firstly, when the diameter of the blasting barrier hole increases, the vibration isolation rate of vibration barrier hole (VIR) in horizontal radial and horizontal tangential directions increase first and then decrease, the VIR in vertical direction increases and the VIR based on resultant velocity increases. Secondly, the VIR decreases first and then tends to be stable with the increase of the row spacing of the damping vibration barrier holes. Thirdly, when the proportion of water filling in the blasting barrier hole increases, the VIR in horizontal radial direction decreases, the VIR in horizontal tangential and vertical directions increase first and then decrease, and the VIR based on resultant velocity increases first and then decreases.

    参考文献
    相似文献
    引证文献
引用本文
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2022-09-19
  • 最后修改日期:2023-01-11
  • 录用日期:2023-02-15
  • 在线发布日期:
  • 出版日期: