Hydraulic and earth engineering – Marine structure or fabrication thereof – With anchoring of structure to marine floor
Patent
1980-03-20
1982-01-19
Corbin, David H.
Hydraulic and earth engineering
Marine structure or fabrication thereof
With anchoring of structure to marine floor
204180R, 204299R, 405131, 405232, E02D 311, E02D 726
Patent
active
043114156
ABSTRACT:
An apparatus and method of driving and increasing the load bearing strength of an electrically conductive pile driven into soil having water above the soil. The top of the pile is insulated on the outside, but the bottom is uninsulated. The pile is driven into the water and soil until the insulator is below the bottom of the water thereby insulating the pile from the water. The anode of an electrical circuit having an anode, a d-c power source, and at least one cathode, is connected to the pile with the cathode placed in the soil. Current is directed from the anode to the cathode through the soil drying out the soil about the uninsulated portion of the pile for reducing the water content of the soil adjacent the uninsulated portion and increasing the load bearing strength of the soil. The length of the uninsulated pipe is at least as great as the length of the insulated pipe and the length of the insulator is substantially the same as the length of the pile above the soil. Preferably the cathode encircles the pile for drying out the soil all around the pile. Another method for increasing the load bearing strength of an electrically conductive uninsulated pile driven into the soil includes insulating the top of an elongate cathode on the outside with an electrical insulator but leaving the bottom of the cathode uninsulated. The cathode is driven into the water and soil until the insulator extends below the bottom of the water. An anode is connected to the pile and electrical d-c current flows from the anode to the cathode through the soil instead of through the water and reduces the water content of the soil and increases the load bearing strength of the pile.
REFERENCES:
patent: 2099328 (1937-11-01), Casagrande
patent: 3766980 (1973-10-01), Kern
patent: 4046657 (1977-09-01), Abbott
patent: 4119511 (1978-10-01), Christenson
patent: 4124483 (1978-11-01), Christenson
patent: 4157287 (1979-06-01), Christenson
Nikolaev, "Pile Driving by Electro-Osmosis", Consultants Bureau, 1962.
Corbin David H.
Engineered Piling Systems, Inc.
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