DEVICE FOR LIFTING AND INSTALLATION OF BRIDGE UNITS Russian patent published in 2015 - IPC E01D21/00 

FIELD: construction.

SUBSTANCE: device for lifting and installation of bridge units includes a bearing beam with front and back supports, a mechanism for lifting of the bridge units fitted with hydrojacks with a system of interception of bunches. The bearing beam is fitted with an additional load-lifting mechanism consisting of traction winches, carriages with a system of by-pass blocks (tackles), fixed stoppers and bypass rollers. The rope from a drum of each traction winch passes through a bypass roller, the system of by-pass blocks of the carriage tackle and is fixed on the fixed support. In the middle part of the bearing beam a temporary support is located which is rigidly attached by the lower end on the assembled part of the span and fitted in the upper part with hydrojacks interacting with the lower belt of the bearing beam. The lower part of the front support is hingedly attached to the assembled part of the span, and the upper part is rigidly attached to the bearing beam. The back support is hingedly attached to the bearing beam and assembled part of the span. The front support can be variable by height by means of built-in spacers.

EFFECT: design improvement.

2 cl, 3 dwg