液压振动锤与冲击锤组合施工工艺在AZ型钢板桩打设中的应用

Application of vibration hammer and impact hammer in AZ profile steel sheet pile installation

针对AZ型钢板桩打设困难问题,以某人工岛钢板桩直立护岸工程为例,进行主要设备选型、桩头受力分析和桩帽替打结构设计,采用液压振动锤与冲击锤组合打设的施工工艺,解决了液压振动锤打设超过20 m后贯入力不足和液压冲击锤打设易破坏桩头的难题,取得了良好的施工效果,具有一定的推广意义。

Aiming at the difficulties encountered in the driving of the AZ profile steel sheet piles,taking the sheet pile works in an artificial island project as an example,we carry out the selection of equipment,the force analysis at the pile tip and the design of the pile cap replacement structure,and apply the construction technology of the combination of vibration hammer and impact hammer.The combination solves the dilemma of lack of insufficient penetration force when the driving depth exceeds over 20 m using only the vibration hammer and the dilemma of the pile head easily being damaged using just the impact hammer.Therefore,such combination has favorable construction effect and promotion significance.