A bridge expansion joint structure

Abstract

Disclosed is a bridge expansion joint structure. The bridge expansion joint structure comprises an expansion joint and a sealing structure arranged on the expansion joint. The expansion joint is formed by a gap located between two adjacent beam slabs, a bridge deck pavement layer is laid on each beam slab, and the bridge deck pavement layers are shorter than the beam slabs so that the mounting gap can be reserved. The sealing structure comprises a joint-crossing board and a sealing layer. The joint-crossing board is laid on the expansion joint and completely covers the expansion joint. The adjacent beam slabs and the bridge deck pavement layers which are laid on the beam slabs respectively are enclosed on the joint-crossing board, so that a sealing groove is formed. The sealing groove is alternately filled with sealant layers and graded broken stone layers formed by silicone foam sealant, and the sealant layers are tightly attached to the joint-crossing board. The upper surface of the sealing layer formed by the sealant layers and the graded broken stone layers and the upper surfaces of the bridge deck pavement layers are located on the same plane. The width of the joint-crossing board is smaller than the width of the sealing groove. The joint-crossing board and the silicone foam sealant are connected into a whole. The silicone foam sealant comprises a silicone sealant white composition, a silicone sealant grey composition, a cross-linking agent, water and a platinum catalyst.

Description

technical field [0001] The invention relates to a bridge expansion joint structure. Background technique [0002] Most of the existing bridge expansion joint structures are directly exposed. Due to long-term exposure to air, dust, debris, vehicle exhaust and acid rain, they are gradually damaged and their service life is greatly reduced. At the same time, the repeated impact of the vehicle for a long time will also have a serious impact on the health of the expansion joint. The combined effect of these factors can lead to damage to expansion joint joints (cracking damage to concrete joints or corrosion damage to steel joints), damage to bridge metal components such as steel plates, and displacement or limitation of deformation and displacement of expansion joints. In the worst case, the accumulation of these defects and damages can lead to failure or even collapse of the bridge structure. Contents of the invention [0003] In order to overcome the above problems, the pre...

AI Technical Summary

Problems solved by technology

[0002] Most of the existing bridge expansion joint structures are directly exposed. Due to long-term exposure to air, dust, debris, vehicle exhaust and acid rain, they are gradually damaged and their service life is greatly reduced.

At the same time, the repeated impact of the vehicle for a long time will also have a serious impact on the health of the expansion joint.

The combined effect of these factors can lead to damage to expansion joint joints (cracking damage to concrete joints or corrosion damage to steel joints), damage to bridge metal components such as steel plates, and displacement or limitation of deformation and displacement of expansion joints.

In the worst case, the accumulation of these defects and damages can lead to failure and even collapse of the bridge structure

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