复合式路面硬路肩弯沉修正及承载力评价

以佛开高速公路改扩建工程为依托,基于最大程度利用硬路肩的绿色理念,在建立三维有限元模型的基础上,通过实测数据对模型进行校准,进而对比分析硬路肩有无侧向约束下的弯沉值,以此得到了硬路肩的弯沉修正系数,并基于现场实测数据对比分析了硬路肩有无盲沟的弯沉值。研究表明:硬路肩无侧向约束条件下的弯沉值大于有侧向约束条件,在测试点位横坐标已确定的条件下,佛开高速公路硬路肩的弯沉修正系数为91.1%;盲沟位置和盲沟前后位置弯沉测试数据均无显著性差异,盲沟对结构整体承载力影响不大。研究成果可为公路改扩建工程中的硬路肩承载力评价及利用提供参考和借鉴。

Deflection Modification and Bearing Capacity Evaluation for Hardened Shoulder of Composite Pavement

On the basis of Reconstruction and Expansion Project of FoKai Expressway,being based on the green concept of hardened shoulder to the maximum extent,on the basis of the establishment of 3d finite element model,the model has been calibrated by the measured data,and then the bending and settling value of hardened shoulder with or without lateral constraints has been compared and analyzed,so as to obtain the bending and settling correction coefficient of hardened shoulder.Being based on the field measurement data,the bending and settlement values of hardened shoulder with or without blind ditch have been compared and analyzed.The results have shown that the deflection value of hardened shoulder without lateral constraint is greater than that with lateral constraint,and the deflection correction coefficient of hardened shoulder of Fokai Expressway is 91.1%under the condition that the abscissa of the test point has been determined.There is no significant difference between the location of the blind ditch and the deflection test data before and after the blind ditch,blind ditch has little effect on the overall bearing capacity of the structure.The research results could provide reference for the evaluation and utilization of the bearing capacity of hardened shoulder in the reconstruction and extension project.