• BLASTING
  • Vol. 38, Issue 2, 136 (2021)
XIA Man-man*, ZHENG De-ming, DAI Chun-yang, and PAN Bao-yu
Author Affiliations
  • [in Chinese]
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    DOI: 10.3963/j.issn.1001-487x.2021.02.020 Cite this Article
    XIA Man-man, ZHENG De-ming, DAI Chun-yang, PAN Bao-yu. Effect of Different Pretreatment Methods on Blasting Demolition of Reinforced Concrete Water-tower[J]. BLASTING, 2021, 38(2): 136 Copy Citation Text show less

    Abstract

    In order to compare the effect of different pretreatment methods on the blasting demolition effect of reinforced concrete water towers, two water towers with similar structures(1 # water tower and 2 # water tower) were demolished by directional blasting.The blasting cut angle of 1# water tower is 198°, the cross-sectional area of the remaining support body is 0.68 m2, the blasting cut height is 1.5 m, the angle of the directional window is 45°, and the symmetrical door is excavated by blasting method.The blasting cut angle of 2# water tower is 200°, the cross-section area of the remaining support body is 0.70 m2, the blasting cut height is 1.2 m, the angle of the directional window is 63.5°, and the symmetrical door is excavated by mechanical method.After the initiation of the two water towers, 1# water tower collapsed smoothly in the predetermined direction, however, as to 2# water tower, the concrete in the cut was completely stripped and flew out, the reinforcement was exposed, and the water tower failed to collapse.The analysis shows that the remaining support body has a large cross-section area and a small compressive stress per unit area after the blasting cut is formed, which is not conducive to the smooth collapse of the reinforced concrete water tower.The angle of the directional window has no direct relationship with the collapse of the reinforced concrete water tower.The height of blasting cut is the key factor affecting the collapse of reinforced concrete water tower.In blasting construction, the strength, stiffness and stable bearing capacity of reinforcement in water tower should be considered, and the reasonable blasting cut height should be considered.
    XIA Man-man, ZHENG De-ming, DAI Chun-yang, PAN Bao-yu. Effect of Different Pretreatment Methods on Blasting Demolition of Reinforced Concrete Water-tower[J]. BLASTING, 2021, 38(2): 136
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