Medium-expansion-amount expansion joint device for railway bridge

Abstract

The invention discloses a railway bridge medium-expansion-amount expansion joint device which comprises an expansion joint and a waterproof rubber belt supporting device. The waterproof rubber belt supporting device is installed on the expansion joint. The expansion joint comprises an anchoring assembly, double-cavity profiles and a waterproof rubber belt. Anchoring steel bars are installed in beam end concrete on the two sides. The double-cavity profiles are mounted in the beam end concrete on the two sides in the bridge direction. The waterproof rubber belt supporting device comprises a warped head supporting plate, a supporting sleeve and a supporting assembly. The warped head supporting plate plays a role in supporting the warped head waterproof rubber belt, a telescopic pipe outside the pipe box plays a role in supporting the waterproof rubber belt, the rubber belt is prevented from drooping due to accumulated dust and water, a connecting shaft at one end of the supporting assembly slides in a groove-shaped hole of a movable connecting plate, the sleeve on the upper portion of the supporting plate supports the waterproof rubber belt all the time between beam seams, the waterproof rubber belt is prevented from falling, the supporting assembly is transversely arranged along a bridge and is in lap joint by a certain distance, so that enough support under the waterproof rubberbelt is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of bridge accessories, and in particular relates to a medium expansion expansion joint device for railway bridges. Background technique [0002] The general diagram of the expansion joints of railway bridges in my country is designed to have an expansion of 30-200mm. When the expansion is greater than 200mm, a special design is required to meet the requirements of the beam joint value and expansion. When the beam gap value is greater than 500mm or the amount of expansion is greater than 500mm, the laying of track sleepers cannot be carried out, and a large displacement expansion device is required to support the track, and the structure is relatively complicated. For medium expansion joints within the expansion range of 200-500mm, no special support structure design for the track is required, and waterproofing, dust accumulation and traffic safety between beam joints need to be considered. The traditional e...

AI Technical Summary

Problems solved by technology

The traditional expansion joints with medium expansion capacity are installed with wide waterproof rubber belts. After long-term use, the waterproof rubber belts will accumulate water and dust seriously, resulting in falling phenomenon, resulting in more water and dust accumulations, which will easily cause damage to the waterproof rubber belts.

Sometimes the porous shape is set through the section of the waterproof rubber belt to increase its anti-deformation ability, but it is often difficult to prevent falling, and it makes production difficult and the cost is high

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