Sealing strips for bridge steel expansion joints

Abstract

The invention provides a caulking lining strip for a bridge profile steel expansion joint. The caulking lining strip is arranged in a gap groove; the caulking lining strip has elasticity; the caulking lining strip comprises a body; the body has a hollow inner cavity; the inner cavity is internally provided with a framework for supporting the body; the framework has the elasticity; a top surface of the body is a convex arc surface; an elastic layer is clamped in the top surface; the elastic layer is extruded on two inner sides of the top surface along two ends in the horizontal direction; the shape of the cross section of the elastic layer located in the top surface has a lowest point; the lowest point is located in the middle of the top surface. The middle position, located in the top surface, of the elastic layer has one lowest point, so that the caulking lining strip is extruded toward the lowest point in the middle under the guidance of the elastic layer when the elastic layer and the body are retracted along the profile steel expansion joint, and the caulking lining strip is in a downward extruded state; a sealing glue waterproof layer is not upward jacked, so that the sealing glue waterproof layer keeps stable and does not generate displacement.

Description

technical field [0001] The invention relates to a caulking lining strip for bridge steel expansion joints. Background technique [0002] Bridge expansion joints are an important part of bridge design. Expansion joints can adapt to the relative movement of the bridge deck caused by temperature changes, vehicle loads and other factors, so that the bridge components remain in a constant state under expansion and contraction. Expansion joints are exposed to the air for a long time, the use environment is harsh, easy to damage and difficult to repair, which directly affects the driving safety and the health of the bridge structure. The caulking and sealing construction of the bridge expansion joints can effectively avoid the failure of the expansion joints caused by the blockage of gravel and other debris, and protect the lower structure from the corrosion of rain, snow, water, dust, and corrosive deicing chemicals. [0003] In the field of bridge expansion joints, there is no ...

AI Technical Summary

Problems solved by technology

The displacement and deformation performance and elastic recovery performance of the original cement concrete pavement caulking strips are poor, and they cannot adapt to the large displacement and deformation of bridge expansion joints

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