METHOD OF FLEXIBLE FILM MATERIAL DIAPHRAGM ERECTION IN A TRENCH Russian patent published in 1994 - IPC

FIELD: filtration proof flexible film material diaphragm construction. SUBSTANCE: pleated panel 3 in roll 4 is placed in trench 1, dug out under protection of thixotropic solution 2, by means of buggy 5, movable ballast 6, and flexible member 7. To this end, during the panel laying a cover 9 is formed from panel 3 by member 11 making weld seal 8. The panel laying is effected by lowering the panel edge with ballast 10, operational traveling of buggy 5, and extension of the seam. The panel pleats are straightened and shaped in the trench in form of the required diaphragm by movable ballast 6 and under the action of gravity force and of tension force of flexible member 7. As the buggy 5 travels, ballast 6, forming the diaphragm, slides in the hollow of cover 9 periodically built up by member 11. EFFECT: improved construction technology. 3 dwg