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新建路面的质量评定及既有路面的强度调查,都希望有一种对路面无破损的测定方法,以检测路面整体强度及其组成情况。本文以弹性层状体系理论为基础,在假设厚度和泊松比均为已知的条件下,以三层体系为例,分析得出路表弯沉盆与路面各层模量间的唯一对应关系。继而把以弯沉盆评定路面刚度归结为一个无约束的非线性最优化问题,按改进阻尼二级收敛最小二乘法原理,编制了高精度的路面刚度评定程序EVSRP2S,兼附评定路面工作应力或应变的子程序,供选用。此外、本文通过环道弯沉盆测定,在进一步验证弹性层状体系理论在路面力学计算中的适用性的同时,提出对实测弯沉盆修正的初步方法,并将上述结果一并运用于有关野外实验路段上的施工质量评定和路面现有强度情况的调查中取得了较好的结果。
The quality assessment of new pavement and the strength of existing pavement, all hope that there is a determination of the road without damage to detect the overall strength of the road and its composition. Based on the theory of elastic layered system, taking the three-layer system as an example, we assume that the thickness and the Poisson’s ratio are both known, and the unique correspondence between the modulus of the road surface and the pavement is obtained. Then, the stiffness of the pavement was evaluated as a non-constrained nonlinear optimization problem. According to the principle of least-squares method of improved damped damping, a high-precision road surface stiffness evaluation program EVSRP2S was prepared, Strain subroutine for selection. In addition, this paper through the loop bend basin determination, to further verify the applicability of the theory of elastic layered system in the calculation of pavement mechanics at the same time, the initial method of correction of the actual measured deflection basin, and the above results are applied to the relevant Field experiment section of the construction quality assessment and the existing strength of the road survey obtained good results.