不同拓宽方式对新旧路基变形影响的研究

Study on Influence of Different Widening Methods on Deformation of Old and New Roadbeds

摘要:

在现代交通基础设施建设中，随着城市化进程的加快和交通量的持续增长，对现有道路进行拓宽改造已成为满足日益增长交通需求的常见做法。通过室内路基缩尺模型试验对路基数值模型进行验证，得到合理的路基数值模型。综合分析预制桩、EPS材料、超载预压法以及土工格栅不同拓宽方式对新旧路基变形的影响，探讨其作用机理。通过对拓宽路基的变形特性进行深入研究，可以为工程设计和施工提供科学依据，以确保拓宽工程的质量和安全，延长道路的使用寿命，同时为类似工程提供参考和借鉴。

Abstract:

In the construction of modern transportation infrastructure, with the acceleration of urbanization and the continuous growth of traffic volume, the widening and rebuilding of the existing roads have become a common practice to meet the growing traffic demand. The numerical model of the roadbed is verified through the laboratory subgrade scale model test, and a reasonable numerical model of the roadbed is obtained. The influence of precast pile, EPS material, overload preloading method and different widening methods of geogrids on the deformation of old and new roadbeds is analyzed comprehensively, and the mechanism is discussed. Through the in-depth study on the deformation characteristics of the widened roadbed, the scientific basis can be provided for engineering design and construction to ensure the quality and safety of the widening project, extend the service life of road, and provide reference for similar projects.