公路软土地基预应力管桩失稳处理方案分析

Analysis of Instability Treatment Scheme of Prestressed Pipe Pile on Soft Soil Foundation of Highway

文中以国省干线S201(联七线)公路霞浦东冲至火车站段工程A3标段为例,对公路软土地基预应力管桩失稳问题进行深入分析,详细勘察了沉陷区域的范围、深度,介绍了沉陷对周边环境的影响,选择针对性的处理方案;深入探究沉陷区处理方案和未沉陷区及沉陷区桩帽方案,通过清理沉陷区域、设置临时支撑、设计桩帽等措施,提高管桩的稳定性,旨在为公路软土地基预应力管桩失稳处理提供参考。

Taking the A3 section of Xiapu Dongchong to Railway Station of S201(Joint 7th Line)highway as an example,this paper deeply analyzes the instability problem of prestressed pipe piles on soft soil foundation of highway,explores the scope and depth of subsidence area and the impact of subsidence on the surrounding environment,and carefully chooses targeted treatment schemes.The treatment scheme of subsidence area,pile cap scheme of unsubsidence area and pile cap scheme of subsidence area are deeply investigated.The stability of pipe pile is improved by clearing subsidence area,seting up temporary support and designing pile cap.The purpose is to provide reference for the instability treatment of prestressed pipe pile on soft soil foundation of highway.