When thinking of pavement maintenance engineering, often both the processes and characteristic issues are brought to light; both the processes and characteristics stem from the decisions made through a system based on expert's knowledge resulting in the integration of the decision-making system and technology. The necessary information about pavement service-conditions were collected, managed, and analyzed by this system, and to adapt with future technology, extra information was allowed to be added into the system. For the purpose of finding relevant data in existing cases, a multi-branch tree algorithm is utilized and would find several maintenance plans. Those plans would then be brought forward to the user. According to the general building process of management, the system function and structure was studied and the system was composed of three function parts named model subsystem, database subsystem and method subsystem. As a result the management and realization of expert's knowledge-base, the realization of pavement damage mechanism analysis model and the human-machine interface were designed.

The layer-by-layer construction process of roller-compacted concrete (RCC) leads to the formation of layer zones, resulting in the transversely isotropic constitutive behavior of the RCC dam. Crucially, the thickness of the layer zone exerts a non-negligible influence on the overall deformation behavior of the RCC dam structure. An analytical expression for the thickness of the layer zone is derived based on the equivalent elastic modulus theory, and the influence of concrete with the same and different properties on the thickness of the layer zone is investigated. Numerical analysis is employed in conjunction with the RCC dam project to quantitatively assess the influence of layer thickness on the displacement of the dam structure. The numerical results demonstrate that considering the thickness of the layer zone leads to a substantial increase in both horizontal and vertical displacements of the dam. Furthermore, the range of extreme values of layer thickness is established using the variational principle of elasticity mechanics. When the elastic modulus ratio of RCC with layer zones to bulk concrete β is 0.85–0.99, a reasonable thickness of the layer can be obtained. When the weakening coefficient k and β are close to 1, the thickness of the layer is close to 10 cm, which is close in nature to the RCC dam.