PURPOSE: To prevent the occurrence of vibration-insulation damage by a method in which a straight pole-shaped vibration-insulating rubber is set between two conveyer nets, and thin rubber plates are attached to the upside and downside of the rubber to make up a vibration-insulating mat, the mat is laid over a structure buried in road, and roadbed is constructed on the mat.

CONSTITUTION: A vibration-insulating mat, which is formed by setting a straight pole-shaped vibration-insulating rubber between two conveyer nets 10 and 11 and by attaching thin rubber plates to the upside and downside of the nets 10 and 11, is laid over a structure 7 buried in road and roadbeds 4 and 5 and the surface layer 2 and base layer 3 of pavement are constructed on the mat to make up a roadbed having a ground spring constant the same as or similar to the other road. The occurrence of creeping or vibration-insulation to the neighbors can thus be prevented even when the structure 7 is constructed on shallow area.