复杂环境下35 m倒锥壳水塔定向爆破

Directional blasting of a 35m high inverted cone shell water tower in complex environments

摘要:

上海市闵行区曹行双柏路一座要拆除的高35 m锥壳式钢筋混凝土结构水塔，其周边有创意园、架空管线等，爆破区域周边环境较为复杂，倒塌方向单一，精准控制水塔的倒塌方向及爆破飞石和爆破振动难度较大。结合水塔的结构特点和周边环境因素，通过采取等腰梯形爆破缺口，预开设三角形定向窗的方式，对定向的准确性起到了决定性的作用；采用铺设黄砂和草袋的被动防护方法，竹笆和安全网的主动防护方法相结合的防护方法，可以有效控制爆破振动、飞石对周围的影响。爆破取得了较好的效果。

Abstract:

A 35m high reinforced concrete water tower with the conical structure, located at Shuangbai Road, Caohang District, Minhang District, Shanghai, is surrounded by Pioneer Park and overhead pipelines, etc. Since the surrounding environments in the blasting area is relatively complicated, the collapse direction is limited, and it is also difficult to accurately control the collapse direction of the water tower, the blasting flying rocks and blasting vibration. In view of the structural characteristics of the water tower and the surrounding environmental factors, the isosceles trapezoidal blasting gap was made with a pre-cut triangle directional window, which played a decisive role in the accuracy of orientation; meanwhile, the passive protection method of laying yellow sand and straw bags, combined with the active protection method of the bamboo fence and safety net effectively controlled the impact of blasting vibration and flying rocks on the surrounding area, achieving good results.