陡坡砂岩河床深水引孔式锁扣钢管桩围堰施工技术研究  

Study on Construction Technology of Deep Water Lock Steel Pipe Pile Cofferdam in Steep Sandstone Riverbed

作　　者：苏宝磊 SU Bao-lei(China Railway 12th Bureau Group First Engineering Co.,Ltd.,Xi'an 710038,China)

机构地区：[1]中铁十二局集团第一工程有限公司,西安710038

出　　处：《价值工程》2022年第31期86-88,共3页Value Engineering

摘　　要：在深水无覆盖层的斜坡面砂岩河床下采用引孔的方式进行施作锁扣钢管桩围堰,取代传统工艺双壁钢围堰的施工方式,解决了深水无覆盖层的陡坡式中风化砂岩河床无法采用锁扣钢管桩围堰施工的壁垒,对锁扣钢管桩无法直接打入无覆盖层的中风化砂岩采取深水引孔的方式进行施作锁扣钢管桩围堰,成功避免了采用水下爆破、水下开挖等高风险作业;解决该条件下采用传统工艺双壁钢围堰施作带来的工艺繁琐及耗时、耗材等问题。The lock steel pipe pile cofferdam is constructed under the slope sandstone riverbed without overburden in deep water by means of pilot hole,which replaces the traditional construction method of double wall steel cofferdam,solves the barrier that the lock steel pipe pile cofferdam cannot be constructed in the steep slope moderately weathered sandstone riverbed without overburden in deep water,and the lock steel pipe pile cannot be directly driven into the moderately weathered sandstone without overburden,and the lock steel pipe pile cofferdam is constructed by means of deep-water pilot hole.High risk operations such as underwater blasting and underwater excavation were successfully avoided.Under this condition,the problems of cumbersome process,time-consuming and consumables caused by the construction of traditional double wall steel cofferdam are solved.

关 键 词：深水斜坡面砂岩 改善工艺 施作锁扣钢管桩围堰 提高安全质量 

分 类 号：U445.556[建筑科学—桥梁与隧道工程]