3座180m高钢筋混凝土烟囱爆破拆除

摘要

When the surrounding environment of three 180 m high reinforced concrete chimneys can't satisfy therncondition of collapse,blasting cuts located 25 m high position away from the ground were adopted in the directionalrncollapse controlled blasting design. The form of the blasting cut was compound trapezoid. By setting the blasting cutrninitial closed angle at 30 °, the cut high at 3. 5 m and the central horizontal angle of the lower edge of the cut atrn220 °,accurate direction,reduced collapse distance,better controlled blasting hazards of the three chimneys were allrnachieved.%在倒塌空间有限的条件下,3座180 m高钢筋混凝土烟囱采用距离地面25 m的高位爆破切口、复式梯形切口形式定向倒塌控制爆破拆除.通过设置切口初始闭合角为30.、切口高度为3.5m和切口下沿水平切口圆心角为220°,3座烟囱皆定向准确、倒塌距离小、爆破危害控制效果较好.