倾斜旋喷桩在深厚软基桥头跳车处治中的应用研究

Application of Tilted Rotary Pile in the Treatment of Deep Soft Foundation Bridge Jump

受桥梁桩基与路基刚度及沉降差异影响,桥头过渡段存在着不同程度的跳车现象,对于深厚软基段则更为严重。以浙江省G15沈海高速公路深厚软基段桥头跳车工点为例,分析桥头跳车的主要成因,基于G15沈海高速公路作为交通要道的保通要求,通过方案比选,采用倾斜旋喷桩处治,提出处治方案参数及布置,可为深厚软基段桥头跳车不断通处治提供相关工程借鉴。

Due to the differences in stiffness and settlement between the bridge pile foundation and the roadbed,there are varying degrees of vehicle jumping in the transition section at the bridge head,which is more severe for deep soft foundation sections.Taking the bridge head bumping construction site of the deep soft foundation section of the G15 Shenhai Expressway in Zhejiang Province as an example,the main causes of bridge head bumping are analyzed.Based on the traffic requirements of the G15 Shenhai Expressway as a transportation hub,through scheme comparison and selection,inclined rotary jet grouting piles are used for treatment,and the parameters and layout of the treatment plan are proposed.This can provide relevant engineering reference for the continuous treatment of bridge head bumping in deep soft foundation sections.