轻质泡沫混凝土在路基中的应用

Application of lightweight foamed concrete in subgrade

依托工程实际,通过Midas GTS软件建模对轻质混凝土路基的变形特性和钢管桩的受力特性进行了分析研究。通过对路基变形的分析,得出路基临空面的水平位移在中部变形最大,而路基顶面的沉降与轻质混凝土填筑的厚度相关,填筑越厚,沉降越大。钢管桩结构有利于提高路基的整体性,有效地限制了轻质混凝土底部与强风化岩的相对位移,提高了路基的稳定性。通过对钢管桩的受力分析,得出钢管桩在轻质混凝土和强风化岩交界面会出现危险点,应加强设计。

Relying on the engineering practice,this paper analyzes and studies the deformation characteristics of the lightweight concrete subgrade and the mechanical characteristics of the steel pipe pile through Midas GTS software modeling.Through the analysis of the subgrade deformation,it is concluded that the horizontal displacement of the subgrade surface has the largest deformation in the middle;and the settlement of the subgrade top surface is related to the thickness of the lightweight concrete filling.The thicker the filling,the greater the settlement.The steel pipe pile structure is conducive to improving the integrity of the subgrade,effectively limiting the relative displacement between the bottom of the lightweight concrete and the strongly weathered edge,and improving the stability of the subgrade.Through the stress analysis of the steel pipe pile,it is concluded that the steel pipe pile will have a dangerous point at the interface between the lightweight concrete and the strongly weathered rock,and the design should be strengthened.