SEDIMENT INFLOW PREVENTIVE MEMBER OF POROUS PIPE FOR UNDERDRAINAGE AND SEDIMENT INFLOW PREVENTION

摘要

PURPOSE: To efficiently and permanently prevent sediment inflow to a porous pipe for under drainage by easy and safe working. ;CONSTITUTION: A sediment inflow preventive member 1 is manufactured by aggregating polypropylene fibers continuously curled and Thereafter, a sediment inflow protective layer is made by winding the provided sediment inflow protective member 1 around a porous pipe, and sediment inflow preventive treatment is applied to the porous pipe 3 by winding a nonwoven fabric 4 around it.;COPYRIGHT: (C)1996,JPO