| 摘要 |
PROBLEM TO BE SOLVED: To provide a filling member for an underground water tank which is excellent in workability in which filling members adjacent in an oblique direction can be connected to each other only when the filling members are arranged in a horizontal direction (longitudinal/lateral direction) and in a vertical direction without using a connector, and the arrangement work in the horizontal direction can be easily performed since the filling members have no longitudinal/lateral directionality.SOLUTION: A filling member for an underground water tank comprises at least a square horizontal board part 1, and a connection protrusion 3a and a connection recess 3b for horizontal connection and a connection protrusion 4a and a connection recess 4b for oblique connection are integrally formed in each of division units where the horizontal board part 1 is divided into four division units with a longitudinal center line C1 and a lateral center line C2, and each division unit is shaped so as to be matched each time it rotates by every 90° with an intersection O between the longitudinal center line and the lateral center line as a center. Since the filling members have no longitudinal/lateral directionality, the arrangement work can be easily performed. The filling members adjacent in the horizontal direction are connected to each other by fitting the connection protrusion 3a to the connection recess 3b, and the filling members adjacent in the oblique direction are connected to each other by engaging the connection protrusion 4a with the connection recess 4b.SELECTED DRAWING: Figure 2 |
