新老路基结合部处治技术应用及效果分析

Treatment technology application and effect analysis of new and old roadbed joints

针对新老路基结合部问题,结合试验路段结合处技术应用实例,分别从新老路基结合部常见病害、成因分析、处治技术应用及实验效果分析等方面进行研究。结果表明,路基顶面沉降均不超过4cm,水平位移在0~1.5mm范围内,路面结构未出现裂缝和失稳现象,证实土工格栅和砂砾石垫层加筋填料的处治方案科学有效,能够有效改善新老路基不协调变形问题,为改扩建拓宽工程的新老路基结合部处理技术方面提供借鉴。

In order to solve the problem of junctions between new and old roadbeds in road widening projects,combined with actual engineering examples and based on the analysis of the common diseases and causes in the roadbed widening project,this article made researches on project overview,treatment design and treatment effect analysis and n.The results show that the settlement of the roadbed top surface is not more than 4 cm.Additionally,the horizontal displacement is just in the range of 0~1.5 mm.Moreover,there is no crackand instability phenomenon in the pavement structure,indicating that the treatment plan of geogrid and gravel cushion reinforcement filler is scientific and can effectively improve the deformation problem of old and new roadbeds,which can provide reference for the processing technology of the new and old roadbed combination divisions for the extension and expansion projects.