Ultra-shallow-buried comb plate bridge expansion device

Abstract

The invention discloses an ultra-shallow-buried comb plate bridge expansion device. The device comprises a beam end and an expansion joint notch. The device is characterized in that: the upper surface of a fixed comb plate (4) is flush with the upper surface of a movable comb plate (7), the fixed comb plate (4) and the movable comb plate (7) are mutually crossed and meshed at a joint through a comb structure, and the upper surface of the fixed comb plate (4) and / or the upper surface of the movable comb plate (7) are / is provided with a plurality of grout overflow holes (5) penetrating through the comb plates. or a grout overflow hole (5) is additionally formed in the upper surface of a dustproof metal plate (6) and located in a movable telescopic area between the fixed comb plate (4) and the movable comb plate (7). The device is reasonable in structure and convenient to install, the compactness of concrete can be guaranteed, the technical problems of the compactness and flatness of the concrete of the bridge telescopic device are ingeniously solved, and the flatness of the connection between a telescopic panel and a bridge deck can also be guaranteed. Meanwhile, the anti-shearing capability of the comb plate is also improved, and exhausting, packaging and drilling sampling are facilitated.

Description

technical field [0001] The invention relates to a bridge expansion device, in particular to an ultra-shallow buried comb plate bridge expansion device, which belongs to the technical field of road and bridge engineering. Background technique [0002] The bridge expansion device is an important connecting part between the beam ends of the bridge. The quality and performance of the device will directly affect the durability of the entire bridge project. In the installation and construction process of the professional subcontracting project of the bridge expansion device, the quality of the concrete has a decisive influence on the quality of the entire project. The hardened concrete should have sufficient strength and durability indicators to bear the load and resist the erosion of the external environment. An important index to determine the durability of concrete is the compactness of concrete. [0003] When the bridge expansion device is installed, the flatness of the conne...

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Problems solved by technology

[0008] The purpose of the present invention is to solve the technical bottleneck of the existing bridge expansion device. After the concrete is hardened, there will be a shrinkage gap between the bridge expansion device and the concrete pouring amount cannot be accurately grasped, and the compactness of the concrete and the connection between the expansion panel and the bridge deck cannot be guaranteed. The flatness of the expansion joint device leads to the poor compactness of the concrete poured inside the expansion joint device, the unsatisfactory flatness of the connection between the expansion tooth plate and the bridge deck, and the defects and deficiencies that the product packing belt is easy to be cut short. Now we provide a reasonable structure and convenient construction. , whether it is the post-cast concrete construction method or the first-pour concrete construction method, there will be no shrinkage gap between the concrete hardened and the bridge expansion device, and the amount of concrete pouring can be precisely controlled, which can not only ensure the compactness of the concrete, but also An ultra-shallow buried comb bridge telescopic device that ensures the smoothness of the connection between the telescopic tooth plate and the bridge deck, and the product is easy and firm to pack

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