预应力混凝土管桩在高速公路软土地基中的应用研究

Research on the Application of Prestressed Concrete Pipe Piles in Soft Soil Foundations of Highways

为了解决高速公路改扩建工程中软土地基承载力差等问题,施工人员常采用预应力混凝土管桩进行软基加固。通过对预应力混凝土管桩在软土地基中的应用进行研究和分析,结果表明:单桩在竖向荷载作用下的承载机理主要受桩身自重和土体侧向土压力的影响,通过预应力技术,可以增强桩体的抗弯能力、提高承载能力;影响单桩承载力的主要因素包括桩径、桩长、预应力水平等,其中,桩径和桩长是影响承载力的关键因素。静压桩通过外部静压力将桩体沉入土体中,形成摩擦阻力和端阻力,从而提高桩体的承载能力。通过系统分析,可以更好地理解预应力混凝土管桩在软土地基中的应用及其施工技术,为工程实践提供参考。

In order to solve the issues of poor bearing capacity of soft soil foundation in highway reconstruction and expansion projects,this paper adopts prestressed concrete pipe pile for soft foundation reinforcement.Through the research and analysis of the application of prestressed concrete pipe pile in soft soil foundation,the results show that:The bearing mechanism of a single pile under vertical load is mainly affected by its own weight and lateral earth pressure.Using prestressed technology can enhance the bending resistance of the pile and improve the bearing capacity.The main factors affecting the bearing capacity of single pile include pile diameter,pile length and prestress level,among which pile diameter and pile length are the key factors affecting the bearing capacity.The static pressure pile is to sink the pile into the soil through the external static pressure to form friction resistance and end resistance,so as to improve the bearing capacity of the pile.Through systematic analysis,the application and construction technology of prestressed concrete pipe pile in soft soil foundation can be better understood,and providing reference for engineering practice.