高速公路深厚软土地基路桥过渡段处理方法多,但一般处理方法存在施工难度大、施工控制比较困难、控制效果不理想等问题。泡沫轻质混凝土作为一种新型路基填料,具有自重轻、强度高、直立性强、长期性能稳定、施工便捷等优点,逐渐被用于高速公路路桥过渡段换填。文中以实际工程为背景,对泡沫轻质混凝土处理方法与预应力管桩处理方法进行安全性、经济性、适用性等3个方面分析比较,为类似工程实例提供借鉴和参考。 There are many ways to deal with the transitional section between expressway and soft soil subgrade and bridge, but the general treatment methods are difficult to construct, construction control is more difficult and the control effect is not ideal. As a new type of subgrade filler, lightweight lightweight concrete has the advantages of light weight, high strength, strong erection, long-term stable performance and convenient construction. It is gradually being used for the replacement of expressway road and bridge transitional sections. Based on the actual project, this paper analyzes and compares the safety, economy, applicability and other aspects of foam lightweight concrete treatment and prestressed pipe pile treatment, providing reference and reference for similar engineering examples.