高桩承台靠船墩群桩水平受力简化分析

在船闸及河道中广泛应用的靠船墩、防撞墩等高桩承台结构承受较大的水平荷载,多采用群桩基础,而群桩受力分析比较复杂,有必要进行简化研究。以高桩承台靠船墩桩群为研究对象,分析了最不利工况,即撞击力作用通过靠船墩角点,且呈切线方向。通过典型的钢管桩三桩墩台进行分析,进一步推广到其他群桩结构,推导出简化公式。

Simplified Analysis of Horizontal Force on Breasting Dolphin Pile Group of High-pile Base Slab

The high-pile base slab structures of breasting dolphin,anti-collision pier and etc.are widely used in ship lock and river channel to bear a large horizontal load.The pile group foundation is often used.The force analysis of pile group is relatively complex.Therefore,a simplified study is necessary.Taking the high-pile base slab breasting dolphin pile group as the study object,this paper analyzes the most unfavorable condition,namely that the impact force acts through the angular point of breasting dolphin and presents the tangential direction.By analyzing the typical steel pipe-pile three-pile pier abutment,the other pile group structures are further generalized and the simplified formula is derived.