MAINTENANCE METHOD FOR PIPE CULVERT Russian patent published in 2008 - IPC E01F5/00 

FIELD: construction.

SUBSTANCE: pipe culvert maintenance methods provides for temporary waterway bypassing, new pipe section installing into the inner space of defected pipe ensuring gap between them, which will be filled up with concrete grout. Tell tail pipes coming into inter-pipe space are installed into overhead ceiling of sections at a certain distance. Initially inter-pipe space is filled up through openings situated in the upper part of side section walls until the lower level of openings is reached. The openings are capped. Overhead part is then filled up with concrete until it comes out from the second pipe. The first pipe is capped and concrete is supplied through the second pipe until it comes out from next pipe. Similar operations are repeated on all subsequent sections. Each section of new pipe is form by the several rings made of metal plates. The gap between the old and new pipes is made at less 100 mm to ensure inter-pipe space filling. Height of pipe projection in the inter-pipe space is determined so that gap between pipe end and ceiling of the old pipe is no less than 40 mm.

EFFECT: complete filling of inter-pipe space between old recovered pipe and new pipe with concrete grout and reliable monitoring of filling process.

8 cl, 4 dwg