工程爆破

2004, (01) 16-18+34

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钢筋混凝土烟囱触地飞溅分析
ANALYSIS ON THE SPATTERS RESULTED FROM TOUCHDOWN OF A REINFORCED CONCRETE CHIMNEY

沈朝虎,张智宇,庙延钢,杜云鹤
SHEN Chao-hu~1,ZHANG Zhi-yu~2,MIAO Yan-gang~2,DU Yun-he~1 (1.Research and Design Insitute of Engineering Science,Chengdu Military Region,Kunming 650031, China;2.Kunming University of Science and Technology,Kunming 650093,China)

摘要(Abstract):

钢筋混凝土烟囱爆破拆除中 ,烟囱触地冲击地面引起的飞溅物危害较大。通过量纲分析 ,建立了飞溅物距离与烟囱触地冲量以及烟囱与地面接触长度的关系。利用模拟试验取得的数据 ,通过回归分析 ,拟合出不同场地条件下烟囱触地飞溅物距离的预测公式。以 12 0m高的钢筋混凝土烟囱为实例 ,预测了它触地时飞溅物的最大距离。
In blasting demolition of a reinforced concrete chimney,the spatters caused by its touchdown have a great hazard.By the dimension analysis,the relation of spattering distance to touchdown impulse and contact length of chimney body to the ground was established.Through the regression analysis using the data from modeling tests,the formulae for predicting the spattering distances at different conditions of ground were fitted out.As a practical example,the maximal distance of spatters when a reinforced concrete chimney with a height of 120m collapsed to the ground was forecasted by use of the derived formulae.

关键词(KeyWords): 钢筋混凝土烟囱;爆破拆除;量纲分析;模拟试验;飞溅分析
Reinforced concrete chimney;Blasting demolition;Dimension analysis;Modeling test; Spattering analysis

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作者(Author): 沈朝虎,张智宇,庙延钢,杜云鹤
SHEN Chao-hu~1,ZHANG Zhi-yu~2,MIAO Yan-gang~2,DU Yun-he~1 (1.Research and Design Insitute of Engineering Science,Chengdu Military Region,Kunming 650031, China;2.Kunming University of Science and Technology,Kunming 650093,China)

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