Hydraulic servo system for bridge accurate closure

Abstract

The invention discloses a hydraulic servo system for bridge accurate closure. The hydraulic servo system for bridge accurate closure comprises a segmental beam which is provided with an incremental launching equipment with a pier and an opposite beam to be closed and is characterized by also comprising a PLC control unit; the opposite beam is provided with a sensor used for performing sensing on adistance between the opposite beam and the segmental beam; the incremental launching equipment is a viscous damper with a propping stretching function; a signal output end of the PLC control unit isconnected with a signal input end of a stop valve and a signal input end of a hydraulic incremental launching device; and a signal input end of the PLC control unit is connected with a signal output end of the sensor. For the hydraulic servo system provided by the invention, by performing accurate controlling on a whole closure process by the PLC control unit, bridge closure is efficiently and rapidly finished; and after closure, the viscous damper remains in situ to continuously exert a damping vibration function, and disassembly of the incremental launching equipment and mounting of the damper are avoided.

Description

technical field [0001] The invention relates to bridge engineering components, in particular to a hydraulic servo system for precise closure of long-span bridge girders. Background technique [0002] Bridge construction projects generally have a long construction period, complex working conditions, and many irresistible factors such as ambient temperature. Many factors affect the accuracy of the beam-body closure, and the beam-body closure cannot be performed in real time. It is necessary to wait for the appropriate time and temperature before construction. [0003] The current bridge closing method is to reserve segmental beams. Due to the influence of temperature and construction errors, the segmental beams must be reprocessed on site, which affects the construction period. The precision of the closure cannot be grasped, which directly affects the quality of the project, and the construction cost is high, the difficulty is high, and the cycle is long, which affects the in...

AI Technical Summary

Problems solved by technology

[0003] The current bridge closing method is to reserve segmental beams. Due to the influence of temperature and construction errors, the segmental beams must be reprocessed on site, which affects the construction period.

The precision of closing can not be grasped, which directly affects the quality of the project, and the construction cost is high, the difficulty is high, and the cycle is long, which affects the installation of shock absorption equipment

[0004] If the segmental beam is prefabricated and then directly pushed and closed with the opposite beam by using the jacking equipment, the beam body closing can be carried out all-weather, but the precision requirements are high, and after the closing is completed, the jacking equipment must be removed, and then the adhesive can be installed. The hysteresis damper is used to damp the bridge. The whole process is complicated, costly and economical

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