钢筋混凝土桥梁的爆破拆除，多是破坏其支撑部位后，自然垮塌解体。该天桥横跨高速公路，其上部结构为空心箱梁，要求爆破拆除时，必须对天桥尽可能破碎性拆除，以减小后期清理难度，避免长时间影响高速通行，而水压爆破通过水将爆破能量均匀分布在被爆体的周围，易于使上部箱梁结构充分解体，再结合对桥拱的控制爆破，圆满实现爆破目的。该文中一些现场施工经验和方法，可供类似工程借鉴。%The blasting demolition of reinforced concrete bridge, which occurs mainly for the destruction of much of its support site,naturally collapse. The footbridge across the highway, with a hollow box girder on its superstructure, requires crushing demolition to reduce the post-cleanup difficulty to further avoid the trouble of prolonged high-speed access,but hydraulic blasting through water blasting energy is evenly distributed around blasting, so it's easy to make full disintegration of the upper box girder structure,combined with controlled blasting of the arches,the successful blasting purpose can be achieved. In this paper,some of the on-site construction experience and methods are presented for similar projects in the future.
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