工程爆破

2012, v.18;No.68(02) 39-41+92

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深水钢围堰基坑水下爆破设计与施工
UNDERWATER BLASTING DESIGN AND CONSTRUCTION FOR THE FOUNDATION-PIT OF THE STEEL COFFERDAM AT DEEP WATER

李奎河;
LI Kui-he(No.4 Engineering Co.,Ltd.,of China Railway 14th Bureau Corporation,Jinan 250014,China)

摘要(Abstract):

田家坪舞水河特大桥是新建长沙至昆明铁路客运专线湖南段的重点项目,主桥采用大跨度连续箱梁结构,7#主墩桩基、承台采用圆形双壁钢围堰施工,为将双壁钢围堰下沉就位,需进行基坑水下爆破施工。对该基坑进行了水下爆破设计与施工。实践证明,该水下爆破设计合理、施工方便,可为类似工程提供借鉴和参考。
Tianjiaping Wushui River Bridge is an important item of Hunan section of Changsha-Kunming railway passenger line.The main bridge is large span continuous box girder structure,double-wall steel cofferdam with circle shape was used for the construction of the pile and pile cap of 7# main pier,and foundation-pit of the double-wall steel cofferdam was excavated by underwater blasting in order to the double-wall steel cofferdam sinking to design location.The design and construction of underwater blasting for the foundation-pit were carried out.The practice of the project has proved that the design of the underwater blasting is rational and its construction is convenient,which can provide a reference for similar projects

关键词(KeyWords): 深水桥墩;钢围堰;基坑;水下爆破;设计;施工
Deep-water pier pit;Steel cofferdam;Foundation-pit;Underwater blasting;Design;Construction

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作者(Author): 李奎河;
LI Kui-he(No.4 Engineering Co.,Ltd.,of China Railway 14th Bureau Corporation,Jinan 250014,China)

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