METHOD FOR CONSTRUCTION OF DRAINAGE SYSTEM Russian patent published in 2009 - IPC E02B11/00 

FIELD: construction.

SUBSTANCE: method for construction of drainage system comprises device of horizontal drain coupled with water drain. In tunnel an internal drain is arranged, at the same time in concrete wall and ground adjacent to it from external side, a hole is drilled, in which a carcass perforated stainless steel pipe is inserted. Joints between wall and carcass pipe are tightly sealed with sealant. A drain plastic perforated pipe coated with geotextile from all sides is inserted into carcass pipe. Further anchor bolts are installed in wall, on which a rubber gasket is placed, as well as flange, guide cylinder of which is coupled with end of drain pipe, washer, and produced structure is pressed with the help of nuts screwing. Afterwards a drain pipe is mounted, connecting flange with a water drain tray.

EFFECT: invention makes it possible to reinforce draining action by means of faster drain of water from ground adjacent to external side of wall, and to increase reliability of system operation by prevention of sediment ingress into drain.

1 dwg