METHOD FOR INSPECTION WELL HATCH MANUFACTURING Russian patent published in 2007 - IPC E02D29/12 E02D29/14 

FIELD: construction and community facilities, particularly hatches for inspection wells, underground distribution pipelines, cellars, road pavings and other structures.

SUBSTANCE: method involves installing reinforcing cage of support ring and reinforcing cage of lid in mold bottom plate, wherein reinforcing cage of support ring includes inner ring formed of sheet metal and/or profiled metal and round steel rod connected to the inner ring by means of fixedly secured partitions, reinforcing cage of the lid includes outer ring made of sheet metal and/or profiled metal, reinforcing mesh fixedly connected thereto, round steel rod and upper reinforcing mesh; pouring non-metal binding material into the mold bottom plate, wherein above round steel rods of support ring and lid are pre-stressed by heat-treating thereof before filling with binding material and by tightening round steel rods with stretchers, wherein the stretchers are made as at least 12 reinforcement posts uniformly distributed along annular rod perimeter inside thereof and rigidly fastened to mold bottom plates; providing binding material strength generation; removing the ready articles from molds and cutting projected bar ends.

EFFECT: increased strength, crack-resistance and rigidity under the action on outer vertical dynamic load, increased service life, reliability and workability duration, as well as extended fatigue limit and vehicle safety during vehicle passage over hatch.

1 cl, 11 dwg