多道瞬态面波评价路桥过渡段填筑质量方法探讨

Discussion on the Method of Using the Multi-Trace Transient Surface Wave to Evaluate the Filling Quality of Road and Bridge Transition Section

摘要: 铁路或公路路基填筑质量评定多引用压实度作为评判指标，但该指标对于填料为级配碎石的路基不适用。本文基于理论推导获得孔隙率和地基系数与面波波速之间的关系式，进而结合采用最小二乘法拟合的现场面波波速探测数据，建立了波速与孔隙率、地基系数之间的关系，并通过与室内外实验得出的二者的标定曲线对比，提出了一种对级配碎石填料路桥过渡段进行填筑质量评估分析的方法。

Abstract: Compaction degree is always used as the evaluation index in the quality evaluation of the filling quality of railway or highway subgrade. But this index is not suitable for the roadbed which is made of graded crushed stone. Based on the theoretical derivation, the relationship between the porosity, the coefficient of the subgrade and the surface wave velocity is deducted in this paper. And thus a function that describes the relationship between the wave velocity, the porosity and the coefficient of the subgrade was proposed by combining the least square method with the measured data of surface wave velocity. And through the contrast between the indoor and outdoor calibration curve, a method for analysis of the quality of roadbed which is made of graded crushed stone in road and bridge transition section is put forward.