摘要
介绍了一组高耸桥墩的爆破拆除工程实例。该桥墩由于砼体标号高、布筋密集,定向倾倒难度很大,在爆破设计方案中采用了大定向窗倾角、大定向窗尺寸、大爆破切口截面以及大炸药单耗,并辅以对称配重的牵拉,确保了桥墩的顺利倒塌及定向的准确性。这些经验具有实际应用价值。
This paper introduced an example of blasting demolition of a set of high bridge piers. Because of the high strength concrete, large number of vertical reinforcing steels, they were difficult to directional topple down. So, in the blasting design,we not only adopted the large angle and dimensions of directional window, large blasting cut and large specific charge,but also took advantage of pulling force. These measures ensured the pair of bridge piers to collapse smoothly and with an accurate direction. This experience has the great practical application value.
出处
《工程爆破》
北大核心
2009年第3期55-57,63,共4页
Engineering Blasting
关键词
桥墩
爆破切口
定向窗
炸药单耗
对称配重牵拉定向法
Bridge pier
Blasting cut
Directional window
Specific charge
Directional method with symmetrical pulling force
