GEAR FOR LONGITUDINAL PUSHING OF SPAN STRUCTURE OF BRIDGE Russian patent published in 1997 - IPC

FIELD: construction industry, erection of long-length span structures. SUBSTANCE: gear has two pairs of blocks located on headband of support where pulling ropes are laid and joined with one ends to span structure and with other ends - to hydraulic winch positioned on grillage of support. Cargo basket is suspended by means of grips on ropes on side opposite to span structure. Cargo basket is lifted by pontoon crane to upper position where it is fixed with the aid of grips. Pushing of span structure is carried out after this. Registration of ropes by clamp dogs of winches, release of grips and lifting of basket to upper position are executed after complete lowering of basket. Then pushing cycle is repeated. EFFECT: enhanced operational productivity and efficiency. 2 cl, 1 dwg