长管节大管桩在复杂地质条件下的应用

长管节大管桩是近年来开发出的具有抗击打能力强、抗弯性能强、混凝土耐久性高、造价相对较低等特点的优秀桩型,其穿透夹石、夹砂层能力较强,可在一定范围内取代钢管桩。以福州港江阴港区11~#泊位工程为例,采用钢管桩和混凝土长管节大管桩(高强度预应力混凝土管桩+钢桩靴的组合桩)作为桩基,顺利完成沉桩。与传统桩型相比,长管节大管桩的力学性能和成本都具有一定优势。

Application of long tube and large diameter cylinder pile in complex geological condition

The large diameter cylinder pile with long tube is a kind of excellent pile type that developed in recent years which has good anti-strike and anti-bending ability,high durability and low cost.It can be replaced steel pipe pile in a certain range due to a strong ability to penetrate rock and sand.Taking the No.11 berthing project in Jiangyin Port,Fuzhou Port Area as an example,this paper applies the steel pipe pile,and the large diameter cylinder pile with long tube(composite pile of high strength pre-stressed concrete pipe pile+steel pile boots)as the foundation.The sinking pile is successfully completed.Compared with the traditional piles,the mechanical properties and cost of the long tube and large diameter cylinder pile have certain advantages.