Corrugated plate of plastics used for method of construction for draining the ground and the like

Abstract

In the method of construction for draining the ground for the ground in which as shown in FIG. 11, the circumference of the surface of ground requiring draining of the ground ( 1 ) is dug to form a waterway ( 3 ). The central portion is built from the peripheral portion and leveled by a roller rolling to form a foundation bed ( 2 ). Rainwater permeated into the ground surface earth ( 9 ) covering the upper surface of the foundation bed ( 2 ) is gathered and flows into the peripheral waterway ( 3 ) from the concave portions ( 19 ) of the corrugated plate of plastics ( 7 ) to effect draining. The corrugated plate ( 7 ) on the surface has a corrugated surface in which a number of convex portions ( 18 ) and a number of concave portions ( 19 ) are alternately continuous. The corrugated plates ( 7 ) have an end shape in which the end is put on the end of other same shaped corrugated plate ( 7 ) and can be enlarged. Further, a convex pattern ( 20 ) is provided so that the crushed stones ( 8 ) laid on the corrugated plates of plastics ( 7 ) do not slip out.

What is claimed is:  
     
         1 . A corrugated plate of plastics for draining the ground wherein the surface is formed into a continuous corrugated surface comprising an alternate combination of a number of projecting convex portions and a number of recessed concave portions in the same direction as said convex portions, both ends opposite the continuous corrugated surface are the convex portions, which are put on the convex portions of the ends of other same-shaped rectangular corrugated plates of plastics to be connectable.  
     
     
         2 . The corrugated plate of plastics for the ground according to  claim 1  wherein the convex portions have a convex pattern for holding crushed stones on the upper surface thereof.  
     
     
         3 . The corrugated plate of plastics for the ground according to  claim 1  or  2  wherein an integrally molded non-slipping crosspiece is provided on the back side of the corrugated plate of plastics.