Formation manner and its relay irrigation canal block of the road surface irrigation canal facility, parallels to the longitudinal direction

摘要

PROBLEM TO BE SOLVED: To provide a method of forming a water channel for a road surface, and an intermediary water channel block and a culvert type water channel block for it having improved construction work efficiency and excellent water flow efficiency like drainage efficiency.;SOLUTION: When the water channel blocks having the water channels therein extending in the longitudinal direction, respectively, are connected to each other in a manner of communicating the water channels to each other, the intermediary water channel block 3 is interposed between the water channel block 1 and the culvert type water channel block 2. The water channel block 1 has the water channel 1a having a predetermined cross sectional shape, and the culvert type water channel block 2 has the water channel 2a formed to have a substantially flat and deformed cross-sectional shape which is lower than the cross-sectional height of the water channel 1a. The intermediary water channel block 3 has the water channel 3a having the cross sections at a longitudinal end and the other end which are formed to be the same as the cross sections of the water channels of the water channel block 1 and the culvert-type water channel block 2, respectively, in a manner that the cross section of the water channel 3a is gradually deformed over the longitudinal direction. The amount of flow in the water channels 1a, 3a, 2a of the water channel blocks 1, 3, 2 are set to be substantially same, positions of bottom parts of the water channels 1a, 3a, 2a are aligned in the longitudinal direction, and an upper surface 2b of the culvert type water channel block 2 is lowered compared to an upper surface 1b of the water channel block 1 by a predetermined length.;COPYRIGHT: (C)2008,JPO&INPIT