Subsidence prevention member for underground structure lid and subsidence prevention unit for underground structure lid using this

摘要

PROBLEM TO BE SOLVED: To provide a subsidence prevention member capable of preventing the subsidence of an underground structure lid even when a load of a traveling vehicle is applied, and a subsidence prevention unit of the underground structure lid using the member. SOLUTION: This is a sinking prevention member for supporting a lid for an underground structure for closing an underground structure accommodating space, and has a cylindrical portion and an outward flange portion provided on one end opening side of the tubular portion. The outward flange portion is formed of irregularities on its edge, or the flange portion is provided with an opening penetrating in the thickness direction, and the cylindrical portion has an inner diameter thereof. Underground structure An underground structure that is formed in a size that inserts a cylindrical mass body that internally partitions the storage space for the underground structure, and is provided with a convex portion that supports the tubular mass body on the inner peripheral surface thereof. It is used as a sinking prevention member for the material lid. [Selection diagram] FIG. 5