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1991年3月15日湖北省黄陂县的一座钢筋混凝土大拱桥爆落原址,而近在咫尺的新桥及老水闸安然无恙。该旧桥是一座长112m、宽8.2m的三跨双曲拱桥。担负施工的铁道部十一工程局四处聘请铁道建筑研究设计院作拆除设计,由高级工程师风尔元,工程师娄德兰采用微差控制爆破技术拆除。在时间紧、设备少的情况下,决定墩、台、桥面一次爆塌。他们只在拱顶肋部、拱脚及两个中墩布少量炮眼,桥台部位则采用集团装药,桥面不布孔,利用它遮拦飞石。由于采用了这种新型布孔形式,全桥干净利索地塌于原址。全桥用了六个段别的毫秒雷管。因此,虽然总装药量达94kg,水闸部测到的垂直振动速度只有2 cm/s,从而确保了爆区周围建筑
On March 15, 1991, a large-scale reinforced concrete arch bridge in Huangpi County, Hubei Province broke into its original site, while the Xinqiao and the old sluices nearby were safe and sound. The old bridge is a three-span double curved arch with a length of 112m and a width of 8.2m. Ministry of Railways 11 Engineering Bureau responsible for the construction around the hiring of railway construction research and Design Institute for demolition design, by the senior engineer Wind Er Yuan, Lou Delan engineer using differential control blasting demolition technology. Tight time, less equipment, the decision Pier, Taiwan, a collapse of the bridge deck. They only used a small number of blastholes in the rib of the vault, the arch and the two moulders, while the bridge abutment used the group to charge the material. Thanks to this new form of fabric, the bridge neatly lands in its original location. The bridge uses six segments of the millisecond detonator. Therefore, although the total charge reaches 94 kg, the vertical vibration velocity measured at the sluice gate is only 2 cm / s, thus ensuring the construction around the blast area