Chemistry: electrical and wave energy – Apparatus – Coating – forming or etching by sputtering
Patent
1977-10-13
1978-11-07
Prescott, Arthur C.
Chemistry: electrical and wave energy
Apparatus
Coating, forming or etching by sputtering
204180R, 204300R, 405232, 405258, 166248, 175 19, B01D 1302, E02D 726
Patent
active
041244834
ABSTRACT:
An apparatus and method for assisting the driving of an electrically conductive pile into soil containing water by electro-osmosis in which electrical direct current is directed through the soil for reducing friction between the pile and the soil. The outside of the pile is coated with a dielectric coating but the lower end of the pile is uncoated for providing an electrical cathode at the lower end. The negative output of a d-c power source is connected to the conductive pile thereby placing the electrical cathode at a negative potential. The positive output of the d-c power source is connected to an anode which is positioned in the water causing the water to move from the anode to the cathode through the soil making the pile easier to drive into the soil. Preferably, the width of the uncoated cathode is approximately equal to the width of the pile. In the case of assisting the driving of an electrically conductive hollow pile, a dielectric coating is provided on both the inside and outside of the pile but with the lower end of the pile being uncoated for providing an electrical cathode at the lower end. The negative output of a d-c power source is connected to the conductive pile, a first electrode is positioned outside of the pile and in the water and connected to the positive output of the d-c power source, and a second anode is positioned inside of the hollow pile in the water and connected to the positive output of the power source.
REFERENCES:
patent: 4046657 (1977-09-01), Abbott
Nikolaev, "Pile Driving By Electro-Osmosis", Consultants Bureau, 1962.
Wang, "Stresses in a Saturated Soil Mass During Electro-Osmosis", Consultants Bureau.
Begeman, "The Influence of D.C. Potential on Adhesion Between Clay and Metal Objects . . . Tests", Consultants Bureau.
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