Publication Abstract

Proceedings - Fifth International Conference & Exhibition on Piling and Deep Foundations, 1994, Bruges, Belgium, (DFI)

Electrohydrodynamic effect - piles and their application in erection of buildings and constructions on weak soils
Prof S. N. Sotnikov & A.L. Egorov

Electrohydrodynamic effect (EHDE) as the means of influence on environment and materials has been offered about 40 years ago, however this method hasn't been commonly spread. Investigations having been held in St. Petersburg in 70-s have shown that electric discharge in hole filled with concrete mixture gives opportunity to produce cast-in-place piles with big bearing capacity and cross-section area. Lately there was created the special instrument-electrohydraulic injector giving possibility to produce piles fast. At the moment "RIMAS" company is ready to manufacture the set of equipment which includes: generator of current impulses, electrohydraulic injector and other devices. They've worked out the compositions of concrete mixtures for different soils, technical parameters of impulse devices, calculation methods for definition of number and power of electric discharges producing piles with necessary parameters. EHDE-piles can be made up to 20 meters long with 300 -500 mm of cross section, the bearing capacity can be upto 1000 kN (depending on soil conditions, pile length and cross-section). EHDE-piles have been successfully used during strengthening of foundations of construction allows to confirm that EHDE-technology has great perspectives in foundation engineering.

 article #813; publication #36 (IC-1994)