高大薄壁双曲钢筋混凝土冷却塔定向爆破拆除技术

杨朴; 白立刚

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铁道工程学报 ›› 2006, Vol. 23 ›› Issue (3) : 66-69.

路网研究

高大薄壁双曲钢筋混凝土冷却塔定向爆破拆除技术

杨朴，白立刚

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Technique for Demolishing High Thin-wall Hyperbolic Reinforced Concrete Cool Tower by Directional Blasting

YANG Pu, BAI Li-gang

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摘要

研究目的：解决3座冷却塔拆除中的高大薄臂双曲型冷却塔定向倒塌方向和爆破拆除施工的安全防护措施这两大问题。

研究方法：通过选择合理的孔网爆破参数，采用多方案比选切口形式、切口大小和切口角度，对冷却塔倒塌机理进行分析及研究。

研究结果：冷却塔按设计要求发生扭曲，各层次爆破的定向倒塌且破碎良好。倒塌效果，无后座现象，整体爆堆高约4m，无飞石产生，固定建筑及设备安然无恙，爆破达到了预期效果和目的。

研究结论：切口形式、复合切口高度、切口长度，是确保冷却塔倒塌的最关键技术；塔底水池在倒塌一侧必须全部清除，否则将影响倒塌效果；大型双曲薄壁钢筋混凝土圆筒，在爆破过程中只要发生扭曲，就能确保其倒塌，且破碎良好。

Abstract

Research purposes: The purpose was to solve two major problems existed in demolishing three cool towers, namely the problems of the direction for directional collapse and the measures for safety protection during demolition by blasting.

Research methods: The analysis and research were made on the mechanism of cool tower collapse through selecting national blasting parameters of openings and nets and selecting notch form, notch size and notch angle.

Research results: The cool tower was twisted, collapsed directionally in every layer and broken well according to the design requirements. The expected result and purpose of blasting were obtained with no back-blow, total blasted pile approximate to 4m height, no occurrence of flying stones and no damage to fixed buildings and equipment.

Research conclusions: The notch form, height of compound notch and notch length were the key factors to cool tower collapse. The water pond at tower bottom, located on the side of collapse direction, would be cleaned up. Otherwise it would affect collapse badly. If large-sized hyperbolic thin-wall reinforced concrete barrels were twisted during blasting, it could be collapsed well with good breaking.

导出引用

杨朴, 白立刚. 高大薄壁双曲钢筋混凝土冷却塔定向爆破拆除技术[J]. 铁道工程学报, 2006, 23(3): 66-69

YANG Pu, BAI Li-gang. Technique for Demolishing High Thin-wall Hyperbolic Reinforced Concrete Cool Tower by Directional Blasting[J]. Journal of Railway Engineering Society, 2006, 23(3): 66-69

中图分类号： TU746.5