METHOD TO RESTORE DEFORMED STORM WATER SEWER, COLLECTORS OF SMALL RIVERS IN URBAN AREA Russian patent published in 2015 - IPC E02D37/00 

FIELD: construction.

SUBSTANCE: invention relates to underground construction and may be used in repair of collectors from solid section lining, separate areas of which have sagged for the value reducing throughput capacity of the collector. The method to restore a deformed storm water sewer, collectors of small rivers in urban area includes flow diversion before start of works from the repaired collector into a parallel leg, rock erosion by water downstream the lining, lifting of blocks of solid section lining into rated position by force exposure at them, filling of cavities behind the lining with a hardening mortar. Onto bases of adjacent blocks they lay pads to rated level of the bases, then beams are installed into the collector, which are rested via pads onto the base of adjacent blocks. Jacks are installed onto beams, and a support board is installed under them under the vault of the block, where the board comprises a support shoe and pipes. A through hole is made in the base of the block, where a spacing pipe is placed, which is connected with a concrete injector, for lifting of the block simultaneously with power effort against the vault of the block by jacks, soil is weakened above the vault with the help of hydraulic erosion via joints of adjacent blocks. As the block is raised, concrete is simultaneously injected along the hose into the free cavity under the base of the block via the hole made in it. After the block was lifted to the necessary height, it is fixed with the help of stands until concrete hardening. To lift the next block and weaken the soil above it, wells are previously drilled in the produced gap between upper parts of the lifted block and the block being lifted for soil removal, and wells are arranged as a fan, after which lifting operations are repeated.

EFFECT: technical result consists in reduced labour intensiveness of works performance and material intensity, increased speed of repair compared to conventional methods of repair.

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