高速公路拓宽中路基填筑及新老路基交接处理技术应用

Application of Treatment Technology of Roadbed Filling andIntersection of New and Old Roadbed in Highway Widening

首先探讨了路基填筑中,填筑材料选择、填筑厚度控制及层间压实度对路基稳定性的影响。接着,详细分析了新老路基衔接部位差异沉降的控制方法和实践应用,如换填法、抛石挤淤法和排水固结法等。此外,还讨论了支挡结构的设计与作用,特别是在高填挖区域的应用,以及老路基边坡的治理策略和实施方法。

The article first explores the influence of filling material selection,filling thickness control,and interlayer compaction on the stability of roadbed in roadbed filling.Subsequently,a detailed analysis was conducted on the control methods for differential settlement at the junction of new and old subgrades,such as the replacement method and rock filling methods,riprap and siltation methods,and drainage consolidation methods,as well as their applications in practical engineering.In addition,the article also discusses the design and function of retaining structures,especially their application in high fill and excavation areas,as well as the treatment strategies and implementation methods of old roadbed slopes.