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本文重点研究了柔性路面结构路表弯沉、路基顶面弯沉及其路基顶面压应变对路面结构参数的敏感性,在大量计算的基础上,提出了路面设计指标的新观点,路表弯沉受各个参数的影响较大,不能明确反映路基路面结构的工作状态。计算表明弯沉控制和应力或应变控制不能得到一致的结果。路面设计应该重视路基顶面的压应变分析。高等级半刚性路面下,路基应变较小,传递工作区较浅,因此,设计的重点应该放在稳定性上。
This paper focuses on the sensitivity of the flexible pavement structure to the deflection of the road surface, the deflection of the top of the subgrade and the compressive strain on the top of the subgrade. Based on a large number of calculations, a new viewpoint of the pavement design index is proposed. Deflection by the various parameters of a larger impact, can not clearly reflect the working conditions of roadbed pavement structure. Calculations show that deflection control and stress or strain control do not give consistent results. Pavement design should pay attention to the top of subgrade strain analysis. Under the high-grade semi-rigid pavement, the subgrade strain is smaller and the working area is more shallow. Therefore, the design emphasis should be on the stability.