Double-joint shallow-embedded shape steel type bridge expansion device

Abstract

The invention relates to a double-joint shallow-embedded shape steel type bridge expansion device comprising two edge beams, a middle beam and a plurality of trimming beams. The two edge beams are mounted in the positions, on the two sides of an expansion joint, of a bridge body correspondingly; the middle beam is located between the two edge beams and connected with the edge beams through elastic connecting mechanisms correspondingly; the trimming beams are arranged in sequence at intervals in the transverse bridge direction and all cross the expansion joint; a plurality of penetrating channels are formed in the middle beams; the trimming beams penetrate through the corresponding penetrating channels and are fixedly connected with the middle beams; and waterproof adhesive strips are clamped between middle beams and the two adjacent edges correspondingly and bent in sequence in the bridge direction to form a corrugated structure. According to the double-joint shallow-embedded shape steel type bridge expansion device, the trimming beams are fixed in the penetrating channels in middle beam shape steel, accordingly the height of the whole expansion device is decreased, and thus it is possible that the modular double-joint type bridge expansion device is embedded in a shallow mounting notch.

Description

technical field [0001] The invention belongs to the technical field of bridge expansion joints, in particular to a double-slit shallow-buried steel type bridge expansion device. Background technique [0002] The telescopic device is a key part of the bridge components and plays an important role in realizing the bridge function. The national standard "Road Engineering Terminology Standard" (GBJ124-1988) and the transportation industry standard "Highway Engineering Terminology and Structural Terminology" (JTJ002-87) define the bridge expansion device as: in order to make the vehicle pass the bridge deck smoothly and meet the structural deformation of the bridge deck The general term for devices installed at bridge deck expansion joints. [0003] At present, the commonly used bridge expansion devices can be divided according to the system: ①Modular bridge expansion device; , Modular comb plate type multi-directional displacement bridge telescopic device, etc. [0004] Conve...

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Problems solved by technology

[0006] 1. The connection between the comb steel plate and the bridge structure is only connected by a few bolts, and the connection with the bridge is not firm;

[0007] 2. A shock-absorbing rubber plate is added under the steel plate. The impact of the vehicle on the steel plate is reflected in the impact on the fastening nut, which increases the possibility of the nut falling off. Without the shock-absorbing rubber plate, there is no shock-absorbing effect;

[0008] 3. The steel plate of the comb tooth plate is easy to deform under the long-term impact load and temperature, and the steel plate is in contact with the concrete surface, so a certain gap may be generated, which will cause repeated impacts on the steel plate when the vehicle load passes through the steel plate, which further leads to The anchor bolt fails and the nut falls off;

[0009] 4. Comb-tooth plate bridge expansion devices are relatively expensive to manufacture and complex to install. The anchor bolts fall off and easily lead to diseases such as comb teeth warping. version P17 page) it is recommended not to use comb-tooth plate seams on bridges with slopes greater than 2%.

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