| 摘要 |
FIELD: bridge building, particularly equipment to erect ice-protective shells. ^ SUBSTANCE: hoisting equipment comprises support columns with through perforated orifices arranged at predetermined intervals one from another, as well as beams arranged over and below jacks and provided with sliding fingers. The fingers are coaxial with the perforated orifices. The hoisting equipment also has hydraulic cylinders with safety supports rested upon beams arranged below the jacks, pumping station, control system, oil tank and safety means. Beams arranged over jacks have tie-down means with claws connected to upper part of ice-protective shell. The support columns are coaxial to pile cluster and connected thereof by plates and support frames. Upper parts of the support columns are connected one to another by frame, lower parts thereof are linked by removable spacing bar. The beams located over and below the jacks are H-shaped and have free ends enclosing the support columns. The beams have working plates having closed contours and arranged around beam perimeters. The hydraulic cylinders are connected in pairs to create rows. Safety means are made as safety cages. The cages include a number of members installed one upon another. Height of each member is equal to multiple hydraulic cylinder strokes. ^ EFFECT: increased accuracy of shell superposing with support axis, improved safety of hoisting operations along with reduced labor inputs. ^ 3 dwg |
