SU1293271A1 - Arrangement for sliding-on a bridge span structure - Google Patents

Abstract

The invention can be used when sliding spans on supports. The purpose of the invention is to reduce the complexity of the operation when sliding the superstructure, mainly during construction in seismic areas. The device includes a sliding path 2 and a lateral movement limiter in the form of a rigidly fixed support or support 10 of the bed 3 with an emphasis 4, an adjusting device 5 and a roller 6 interacting with a variable width of the lower axle 7 of the sliding span 1. The adjusting device 5 is made an elastically deformable element, for example a spring, provided with a gripper 8 and placed between the stop 4 and the roller 6, the latter being fixed in the gripper on a vertical axis of rotation. 1 il. SL from 00 ND

Description

The invention relates to bridge construction and can be used when sliding spans onto supports.

The purpose of the invention is to reduce the laboriousness of operations during sliding of the superstructure, mainly during construction in seismic areas.

The drawing shows the proposed device in cross section of the bridge.

The device for sliding the bridge span 1 includes a sliding path 2 and a lateral movement limiter in the form of a bed 3 with an emphasis 4; adjusting device 5 and roller 6, which interacts with the lower som 7 of the retractable building 1. Adjusting device 5 is made in the form of an elastically deformable element, for example, a spring equipped with a gripper 8 and placed between the anvil 4 and the roller 6, the latter being fixed in the gripper 8 on

vertical axis of rotation.

The bed 3 can be made in the form of a welded structure and attached to the slide path 2 by means of bolted joints. The device is installed on an elastic trim 9, mounted on a support or a support 10. The span structure 1 rests in the process of sliding on the slip path 2 through the slide 11. Before sliding the gap S is provided between the bridge 7 of the span and the roller 6, which does not exceed 50 mm .

The proposed device works as follows.

In the process of movement of the span 1 on the slide 11 along the slide path 2, it is shifted to the side by the amount of the gap S, while the side face of the lower half of the span 7 of the span structure contacts

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0

five

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five

with roller 6. When sliding the superstructure with the lower pitch 7 of the variable width through the side movement limiter, the transitional inclined section in the plane first comes in, causing the spring 5 to gradually contract. After passing through the wide sections of the lower belt 7, the spring 5 returns to its original position. At this time, on other supports, or the stopper can skip the span 1 with either a wide or narrow bottom cat 7, causing the spring 5 to contract or expand.

Self-adjusting lateral movement limiters in the proposed device maintain an impending span structure with a lower variable width in a predetermined position and reduce the lateral load on the bridge supports in the event of seismic activity during the sliding process.

Claims (1)

Invention Formula A device for sliding the span of a bridge including a sliding path and a lateral movement limiter in the form of a base frame rigidly fixed to the bridge support with an emphasis, an adjusting device and a roller interacting with the lower axle of the retractable span characterized in labor-intensive operations when sliding the span, mainly during construction in seismic areas, the adjusting device is made in the form of an elastically deformable element, equipped with atom and disposed between the stop and the roller, the latter being fastened in the seizure on the vertical axis of rotation.