AGGREGATE FOR A CONCRETE BRIDGE MOUNTING Russian patent published in 1994 - IPC

FIELD: boreholes exploitation. SUBSTANCE: aggregate has a body and joints for sideways cleansing boreholes. The joints are hydraulically connected to the body and are made in the form of guiding bushes, that are rigidly fixed to the body. The bushes are radially placed in relation to the axis of the body. Branch pipes are placed in the guiding bushes, spring-loaded relatively to them and are capable to move their axes relatively to guiding bushes and beyond the limits of the body. The aggregate has hydromonitoring nozzles, that are placed in the branch pipes outlets. EFFECT: aggregate increases reliability of operation during concrete bridge mounting in cavernous zone of boreholes. 2 dwg