Device and method for simulating characteristics of cracks among crushed blocks and influences of cracks on paving layer

The invention provides a device and method for simulating characteristics of cracks among crushed blocks and influences of the cracks on a paving layer. The device comprises an environment box, a baseis arranged at the lower part of the environment box, and a composite layer test piece for prefabricating the cracks is arranged in the middle of the base; a constraint frame sleeves the composite layer test piece; the two sides of the lower portion of the composite layer test piece are provided with horizontal direction loading devices, the upper part of the composite layer test piece is provided with a paving layer loading device and a rainfall simulation device, the lower part of the paving layer loading device is fixed to the base, and the horizontal direction loading devices, the rainfall simulation device and the paving layer loading device are all connected with an acquisition control system. The influences of the coupling effect of factors such as driving loads, temperature and water on a composite struct