江汉大学学报(自然科学版) ›› 2022, Vol. 50 ›› Issue (1): 5-10.doi: 10.16389/j.cnki.cn42-1737/n.2022.01.001

• 爆破工程 • 上一篇    下一篇

宽大建(构)筑物爆破拆除塌落触地振动速度预测模型

孙金山1,颜佳鑫1,蒋跃飞2,张震1,刘桐2   

  1. 1. 江汉大学 省部共建精细爆破国家重点实验室,爆破工程湖北省重点实验室,湖北 武汉 430056;2. 浙江省高能爆破工程有限公司,浙江 杭州 310000
  • 发布日期:2022-02-22
  • 作者简介:孙金山(1980— ),男,教授,博士,研究方向:工程爆破和地下工程。
  • 基金资助:
    湖北省自然科学基金资助项目(2020CFA043);湖北省重点研发计划项目(2020BCA084)

Prediction Model of Ground Vibration Velocity in Blasting Demolition of Wide Buildings and Structures

SUN Jinshan1, YAN Jiaxin1, JIANG Yuefei2, ZHANG Zhen1, LIU Tong2   

  1. 1. State Key Laboratory of Precision Blasting,Hubei Key Laboratory of Blasting Engineering,Jianghan University,Wuhan 430056,Hubei,China;2. Zhejiang Gaoneng Corporation of Blasting Engineering,Hangzhou 310000,Zhejiang,China
  • Published:2022-02-22

摘要: 建(构)筑物爆破拆除工程中,倒塌的钢筋混凝土结构以较高的速度冲击地面时将诱发地震波,对地震波的振动强度进行预测是分析拆除工程对周边环境影响程度并确定控制措施的前提。基于土体在强冲击作用下的塑性变形特征,碰撞过程的动量守恒理论和量纲分析法,构建了触地接触面较宽的塌落振动预测模型。通过工程案例对计算模型的有效性进行了验证。算例表明,该模型计算精度基本满足工程设计需要,且简便易用。

关键词: 拆除爆破, 塌落冲击, 振动速度, 数学模型

Abstract: The seismic wave will be induced in the blasting demolition projects of buildings and structures when the collapsed reinforced concrete structure impacts the ground at high speed. The prediction of vibration velocity of seismic waves is essential to analyze the influence of demolition projects on the environment and design control measures. Based on the plastic deformation characteristics of soil under the intense impact, momentum conservation theory,and dimensional analysis method,we established a collapse vibration prediction model with a wide contact surface. Some actual cases verified the validity of the calculation model. It shows that the calculation accuracy of the model can meet the needs of engineering design,and it is easy to use.

Key words: demolition blasting, collapse impact, vibration velocity, mathematical model

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