Structural Design of Prefabricated Sidewalk in Sponge City

Abstract

In the traditional pavement design, rainwater is mainly discharged by surface runoff, and in the structural design, the key point is the pavement waterproof. Therefore, the traditional sidewalk design is inconsistent with the requirements of sponge city. The research basis of this paper comes from a field engineering, the structural parameters of prefabricated sidewalk and the corresponding design methods are studied and summarized. The structural function of sidewalk is realized by superposition and combination of each structural layer. For the realization of prefabricated sponge sidewalk technology, the function of each structural layer must be fully considered, and the function of each structural layer should be designed and combined according to the design purpose. The results show that, by discussing the function of each layer of prefabricated sidewalk, the structural layer of prefabricated sidewalk is preliminarily determined(see Figure 2 in main text); according to the strength requirements and water permeability requirements of the structure, the thickness range of the structural layer is 13.11cm-21.3cm; finally, the relationship between plate thickness and critical position load, temperature fatigue stress, and finally determines the thickness of precast cement concrete slab is 15cm.