Pile Driving by Electroosmosis

Electro-Osmosis (Electrokinetic Dewatering)

“…One case study reported in the literature describes the use of the pile as the cathode, resulting in a reduction in the required number of blows with the hammer by 33-42% (Nikolaev, 1962). Conversely, the generation of negative pore pressures at the anode has been shown to provide a temporary increase in capacity for friction piles.…”

Increasing Offshore Pile Driveability Through Electroosmosis

“…Electroosmosis and the other electrokinetic effects associated with the passage of direct current between electrodes buried in soil have been shown in full-scale field tests by Bege~n (1953) and by Nikolaev (1960) to increase the driveability of piles. A theoretical basis for the design of electroosmotic installations was proposed by Esrig (196B) and has been shown experimentally to be correct for stiff clays (Wan and Mitchell, 1976) but to require minor modification when applied to soft clays (Mitchell and Wan, 1977).…”

“…Consequently, it is not surprising that the observations of Begemann (1953) and Nikolaev (1960), indicating that the energy required for pile driving in hard soils can be reduced by more than 50 per cent by electroosmosis, have gone unnoticed. Typical on-shore facilities will rarely require piles when driving is hard.…”

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“…In such cases, higher-order boundary-layer equations or the full Navier-Stokes equations have to be used. Approximate solutions of problems of this kind involving the flow past slender pointed bodies and blunt bodies were considered by Soviet scientists both in the case of weak interaction, corresponding to moderate values of Mach number and rela tively large values of Reynolds number (167)(168)(169), and in the case of strong interaction at very high Mach numbers and finite values of Reynolds num ber (170)(171)(172)(173)(174)(175)(176). Some cases of three-dimensional flows (triangular flat plate, slender body at small angle of attack) were also studied (177)(178)(179).…”