| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide stability and strength of a percolating pipe connected by opposing semi-circular moldings having a large number of small holes in the surface to each other and, at the same time, to provide a means for improving workability of construction work. <P>SOLUTION: The percolating pipe having the through-holes in the surface and a circular section is so constituted that the through-holes are made around the percolating pipe to provide a supporting section supporting load applied to the upper part and a cover section covering the upper part and the sideways part of the percolating pipe is provided, the strength of the percolating pipe is increased and, at the same time, that the flow of earth and sand into the percolating pipe can be prevented. An infiltration institution can be obtained by reduced labor for construction work by laying the percolating pipe on the upper part covered with crushed stone in the bottom section of a trench and carrying out earth cover from the upper part. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
