组合式基层路面结构弯沉指标研究

Study of Deflection Index of Compound Base Asphalt Pavement

柔性基层或组合式基层沥青路面作为新型的路面结构,其弯沉指标控制与现有规范验收体系不相适应,本文通过大量的试验验证与分析,揭示了级配碎石基层顶面弯沉的发展规律及其与沥青路面顶层弯沉指标的相关关系,提出了新型路面结构弯沉指标的控制标准。

Flexible base asphalt pavement and compound base asphalt pavement are new pavement structures in China,so its deflection index value is not fit to current standard system.Through a large number of experiments this paper reveals the deflection indexes development law of graded broken stone subgrade,analyzes the correlation of deflection index between graded broken stone subgrade top and asphalt pavement top.Finally,the control standard of deflection index for the new pavement structure is proposed.