Hydraulic and earth engineering – Drainage or irrigation – Porous waterway – e.g. – sand drain – etc.
Patent
1985-04-11
1988-05-03
Corbin, David H.
Hydraulic and earth engineering
Drainage or irrigation
Porous waterway, e.g., sand drain, etc.
405128, 405267, E02B 1100, E02D 2900
Patent
active
047416440
ABSTRACT:
High density polyethylene sheets are sealed at their lateral edges to form a sheath or envelope for sandwiching a drain mesh. A plurality of spaced apart bore holes is formed along the line of the cut-off and drain barrier and a coupling member is positioned, one in each bore hole, respectively, each coupling member having at least one locking keyway slot formed in a side thereof. These coupling members have stainless steel keyway protectors or cement stops so that cementious material cast in the bore holes so as to stabilize the coupling members do not fill the keyways. After the cementious material has set, the space between bore holes up to the keyway slots is excavated including the cementious material between the facing edges of the keyway material. Then the drain barrier with rigidifying perforated pipes secured in the ends thereof is inserted into the excavated slot with the perforated pipes being telescopically received in and retained by the keyway slots. After insertion of the drain barrier, the trench is backfilled with a material such as, cement bentonite backfill.
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"Tensar Drainage Nets Increase Your Capacity", Tensar Corporation.
Cavalli Nicholas J.
Miotti Giosue
Corbin David H.
Finic B.V.
Zegeer Jim
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