摘要
介绍了复杂环境下110 m高钢筋混凝土冷却塔的爆破拆除。对塔体倒向侧21对X型支撑柱进行重点布孔,对圈梁、塔壁进行局部布孔,在塔壁开设矩形减荷槽及三角形定向窗,形成上下2个正梯形爆破切口。上切口上、下沿对应圆心角分别为216°、223°,下切口上、下沿对应圆心角分别为180°、198°,倒向中心线处切口高度为20.5 m,两侧切口高度为18.5 m。爆破后塔体沿西北向定向倾倒、坍塌,塌落物最远处距塔体倒向下沿47.5 m,塔体破碎效果良好。
The scheme of explosive demolition of 110 m high reinforced concrete cooling tower was introduced. The blast holes were drilled mainly in the 21 pairs X - shores on the falling side of the tower and partly in the ring beam and tower wall. The rectangular off - loading grooves and triangle directional windows were set up in the tower wall, meanwhile the top and bottom trapezoidal blast cut was also created. The central angle corresponding to the top and bottom lining of the top blast cut is 216° and 223° respectively,and the bottom blast cut＇s is 180 ° and 198 ° The height of the blast cut along the failing way is 20.5 m and the both sides＇ are 18.5 m. The directional fails and collapses of the tower body along the northwest after blasting, and the farthest distance of the collapsing objects is 47. 5 m from the bottom lining of the tower body. The total effect of breaking and crushing is fine enough.
出处
《爆破》
CSCD
北大核心
2012年第3期86-88,共3页
Blasting
关键词
爆破拆除
定向倾倒
冷却塔
explosive demolition
directional fall
cooling tower
