A front outrigger support device for improving the stability of the bridge-erecting machine's longitudinal movement through the hole

Abstract

The invention relates to a front landing leg supporting device for improving the stability of longitudinal-moving via-hole construction through a bridge girder erection machine. The front landing leg supporting device comprises a rear supporting unit and a front supporting unit. The end, located behind a front landing leg, of the rear supporting unit is supported on an erected T-shaped girder through an L-shaped hinged support; and the other end of the rear supporting unit supports the front landing leg provided with a plurality of rows of through holes provided with guide cylinders. The front supporting unit is located in front of the front landing leg, the lower end of the front supporting unit is supported on a pier cap of a pier through a cushion box, and the upper portion of the front supporting unit is fixedly connected with a front landing leg transverse-moving trolley through a lead screw or an oil cylinder. The lengths of the rear supporting unit and the front supporting unit are adjusted through relative rotating of threads or telescopic motion of the oil cylinder so as to adapt to relative position difference, caused by manufacturing deviation of the T-shaped beam and the pier and position variation of the front landing leg, of each hole, and effective supporting is guaranteed. Therefore, the front landing leg supporting device for improving the stability of longitudinal-moving via-hole construction through the bridge girder erection machine is simple in structure, low in cost, high in applicability, and capable of reducing front-back swinging of the front landing leg and improving the stability of longitudinal-moving via-hole construction through the bridge girder erection machine.

Description

technical field [0001] The invention relates to a front outrigger support device, which belongs to the field of bridge erecting equipment, in particular to a front outrigger support device for improving the stability of a bridge erection machine's longitudinal movement through a hole. Background technique [0002] The bridge erecting machine has high construction efficiency, safety and reliability, and is widely used in highway and railway bridge construction. With the continuous deepening of the construction of expressways and high-speed railways in our country, the beam type of expressways is very similar to that of passenger railway lines (speeds below 200 kilometers per hour), special railway lines and ordinary railway lines. In order to maximize the use of equipment, To reduce production costs, a road-rail dual-purpose bridge erecting machine that can meet the construction requirements of railway T-beam erection and expressway T-beam erection is often used. [0003] In...

AI Technical Summary

Problems solved by technology

[0003] In addition to erecting the T-beam in the last hole, the front outriggers of the traditional road-rail dual-purpose bridge erecting machine need to be supported on the pad stone of the bridge pier during the longitudinal movement of the main body of the bridge erecting machine. Due to the limitation of the structure of the bridge pier, the front The outrigger is usually a single-leg structure, but it needs to bear a large load when the main machine moves longitudinally through the hole, especially when the main machine is about to reach the position, the force is more complicated. The specific manifestations are: (1) The longitudinal drive of the bridge erecting machine is not synchronized The impact horizontal force generated; (2) The center of gravity of the main frame of the bridge erecting machine moves forward to the vicinity of the front outrigger, and the overhang of the main girder of the bridge erecting machine causes downward disturbance, and the stress on the front outrigger is even worse; (3) The front support The legs are generally very high, and it is easy to shake back and forth

[0004] The above reasons affect the continuity of the vertical movement of the bridge erecting machine, and will cause vibration, which will cause the bridge erecting machine to overturn due to the instability of the front outrigger

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