Study on recyclable precast-slab-fabricated road based on arching effect theory

Abstract Precast slab parameters are important factors affecting the mechanical performance and service life of precast-slab-fabricated recyclable roads. To clarify force mechanism roads provide a basis for selecting parameters, field test road fabricated using large-scale precast was conducted in this study. The horizontal vertical stresses on top bottom surfaces determined. stress-time history curves show that have peak values corresponding to time at which axle acts directly slab. Based arching effect theory, analyzed. Owing between slabs, they were cooperatively stressed. Compared with bearing vehicle load independently, When arch works, both maximum stress decrease. According results, influence laws material, size, thickness, shape obtained. In order achieve Precast-Slab-Fabricated road, characteristic suggested as follows. grade concrete used should be more than C30, size can 2 m, large thickness used(e.g.0.2 m), square width-length ratio 1 adopted far possible.