METHOD TO REINFORCE WALLS OF WELLS IN DISPERSE SOILS Russian patent published in 2012 - IPC E02D3/02 

FIELD: construction.

SUBSTANCE: wells are retained against fall with a protective film. The protective film is a tight film case, which is placed into a wall and is filled with compressed air. Besides, the lowest part of the case is made heavier by soldering-in a cantledge, and in the upper part a valve unit is placed with a pressure gauge and is connected to a source of compressed air. The case diameter above earth surface under compressed air pressure exceeds the well diameter by at least 10 cm.

EFFECT: high manufacturability of well walls fixation in disperse soils and reduced labour inputs, during arrangement of driven piles the porosity of soil walls of the well shaft is preserved, which makes it possible for binding solutions to penetrate into a contact layer of soil, and therefore the bearing capacity of driven piles is increased, when arranging filtration wells the preserved natural porosity of soil in the contact layer does not prevent migration of soil waters in them.

1 dwg