| 摘要 |
FIELD: construction. ^ SUBSTANCE: pushing device to launch spans includes a support beam, skids, a sliding track fixed on the bridge support at the support rigging, lifting hydraulic jacks and power pushing hydraulic cylinders, and also shifting tables with lifting hydraulic jacks. To transfer a pushing force from a power hydraulic cylinder to a support beam, ends of skids are arranged in the form of a cantilever ledge with a segment support board, the cylindrical surface of which contacts with the cantilever support of the support beam. ^ EFFECT: simplified design of the pushing device, elimination of the necessity to use a counterbalance at the final stage of launching and simplified performance of works to lower a span onto capital support parts. |
