Bridge expansion joint trussed beam box

Abstract

The invention discloses a bridge expansion joint trussed beam box which comprises a cuboid-shaped trussed beam box body. A longitudinal side wall of the trussed beam box body is welded with an annular anchor bar preventing sedimentation, the inner end face is welded with a reinforcing coaming which can prevent the side wall from being cracked in tension, the bottom face of the reinforcing coaming can resist bending and vibration, the periphery of the reinforcing coaming stretches out of the outer edge of the end face, and an inner cavity in the inner end face of the corresponding trussed beam box body is provided with a hole in the corresponding shape. A big-head supporting nail is arranged at the bottom. Compared with the prior art, according to the structure, the bridge expansion joint trussed beam box can not be dependent on concrete bearing on the bottom, use is safe, and even if the size of a reserved installation groove opening in a bridge has the large error, or in the process of installation, defects exist in the concrete construction, normal use of an expansion device can not be affected. On the other hand, according to the structure, main factors which affect the service life of the expansion device can be solved properly in the factory so as to come true, and the durable stability of the expansion device can be greatly improved.

Description

technical field [0001] The invention relates to a bridge expansion joint truss girder box, in particular to a bridge expansion joint truss girder box which does not rely on bottom concrete for bearing. Background technique [0002] At present, the structural design of the existing large-displacement modulus bridge expansion device does not fully consider the influence of various environmental factors during the installation of the product, and relies too much on the installation quality to ensure the service life of the product (see attached Figure 4 ). There are two installation defect factors that have the greatest impact on the service life of the telescopic device. One kind of installation defect is the defect of the reserved installation notch of the bridge: the gap at the beam end of the notch is too wide, which may easily cause the bottom of the support box to be empty due to the suspended installation of the telescopic device, and the defect of not enough depth of t...

AI Technical Summary

Problems solved by technology

One kind of installation defect is the defect of the reserved installation notch of the bridge: the gap at the beam end of the notch is too wide, which may easily cause the bottom of the support box to be empty due to the suspended installation of the telescopic device, and the defect of not enough depth of the notch may easily cause the bottom of the truss girder box due to the narrow space , concrete is difficult to pour dense

Another installation defect is the concrete pouring defect of the telescopic device: due to reasons such as poor formwork production, insufficient concrete vibration, insufficient concrete strength, low concrete slump, and high steel bar density, the bottom of the truss box is empty or the concrete The direct cause of poor pouring

During the assembly process, transportation engineering, and installation process of the telescopic device, the truss girder may move left and right within the truss girder to a large extent, which may easily cause the truss girder to not align with the forward force support, resulting in partial load of the support Forced, accelerated damage to the force-transmitting support

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