Railway bridge large-expansion-amount single-seam expansion device

Abstract

The invention discloses a railway bridge large-expansion-amount single-seam expansion device which comprises an anchoring assembly, a double-cavity profile, a waterproof rubber belt, a supporting assembly and a connecting rod assembly. The anchoring assembly, the waterproof rubber belt and the connecting rod assembly are all installed on the double-cavity profile, and the supporting assembly is fixed in beam end concrete; the double-cavity profile is fixed in the beam end concrete; the anchoring assembly comprises an anchoring steel bar, a trapezoidal nut, a locking nut and an anchoring screwrod; the connecting rod assembly comprises a fixing plate, connecting rods, connecting bolts and limiting nuts, the four connecting rods are symmetrically connected to form a rhombus, and the fixing plate is fixed to the beam end double-cavity profile through the anchoring steel bars, the locking nuts and the trapezoidal nuts. The railway bridge large-expansion-amount single-seam expansion devicediscloses by the invention prevents dust and rainwater from being accumulated between beam joints to cause falling of waterproof rubber belt and premature damage to the waterproof rubber belt, and further prolongs the service life of a beam end expansion joint.

Description

technical field [0001] The invention belongs to the technical field of bridge accessories, and in particular relates to a single-slit expansion device with large expansion capacity for railway bridges. Background technique [0002] The general diagram of the expansion joints of railway bridges in my country is designed to expand the amount of expansion to 30-200, which is the expansion amount of a single expansion joint. When the amount of expansion is greater than 200mm, special design is required to meet the requirements of beam gap value and expansion amount. 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. The single-slit expansion device with medium expansion within the range of 200-500mm does not need special support structure design for the track, and...

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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