| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To minimize reduction in permeating capacity caused by clogging by securing a large storage quantity when treating waste water such as rainwater by permeating after storing the waste water, also reducing a surrounding underground water level by collecting underground water by securing the large storage quantity, and further preventing the occurrence of the clogging when permeated in the ground from a rainwater permeating drainage ditch. <P>SOLUTION: A box culvert structure and a U-shaped side ditch type porous plate groove 1 are buried in the ground, and crushed stones 3 are applied around this porous plate groove, and a water permeable sheet 4 is laid so as to wrap the whole of the porous plate groove 1 and the crushed stones 3, and a vertical elongate hole bored in the porous plate groove 1 is formed in a tapered cross section that expands toward the outside. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
