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最近,南通市公路管理处和南京工程兵七三一七厂在南通市如东县掘港钲(县城所在地),综合运用控制爆破、近人爆破和静态爆破成功地拆除了一座净跨40米的钢筋混凝土双曲拱桥,即卫东桥。卫东桥是江苏省南通市如东县掘港钲到丁埝公路上的一座钢筋混凝土有肋双曲拱桥。该桥建于1968年,由于主拱圈变形,裂缝严重,同时桥宽亦不够,经有关部门批准在原桥位进行改建。该桥爆破拆除工作自四月廿三日开始至五月九日结束,兹将有关爆破拆除工作简述如下:
Recently, the Nantong Highway Administration and the Nanjing Engineering Corps, No. 7,317 Factory, successfully dredged a net span of 40 meters in controlled excavation blasting, near-surface blasting and static blasting at Nugang 掘, a mining town of Rudong County, Nantong City (where the county seat is located) Reinforced double-curved arch bridge, that is Wei East Bridge. Weidong Bridge is a reinforced concrete ribbed double curved arch bridge on the Dingjiao Highway between Nantong and Nantong in Jiangsu Province. The bridge was built in 1968, due to the deformation of the main arch ring, cracks, and bridge width is not enough, approved by the relevant departments in the original bridge reconstruction. The blasting work of the bridge commenced on April 23 and ended on May 9. The blast demolition work will be briefly described as follows: