爆扩抗拔钢桩的承载特性分析

Bearing Characteristics of Submarine Explosive Expansion Uplift Steel Piles

结合陆地扩底抗拔桩的承载优势与现有海底抗拔桩的局限性及海上复杂的施工环境,提出了一种新的扩底抗拔桩形式——爆扩抗拔钢桩。利用ABAQUS有限元软件建立二维轴对称有限元桩土接触模型。提取模型计算结果中的Q-S曲线来分析爆扩球的直径、位置高度、数量对桩承载性状影响。结果表明:竖向承载力随着爆扩球直径、数量的增大而增大,并且影响较大,但随着爆扩球位置高度的增加而减小。

A new form of the belled uplift piles,explosive expansion uplift steel piles,is proposed in consideration of the limitations of existing anti-submarine uplift piles and the complexity of maritime construction environment. Based on ABAQUS,the two-dimensional axisymmetric finite element contact model of pile and soil is set up. The parameters include:the diameter of the expanding section,position of the expanding section,and number of the expanding section have been analyzed through the Q-S curve. The results show that: the vertical bearing capacity increases significantly with the increase of the head diameter and number of the expanding section,but decreases with the increase of the height of the expanding section position.