Beam-end embedded pipe sealing structure for stayed cable and sling

Abstract

The invention relates to a beam-end embedded pipe sealing structure for a stayed cable and a sling. The beam-end embedded pipe sealing structure comprises an embedded pipe (3) sleeving the periphery of a beam-end stayed cable (1) in a penetrating manner; an annular clearance (B) is reserved between the embedded pipe (3) and the stayed cable (1); a waterproof hood (2) is arranged at the front end of the embedded pipe (3); the stayed cable (1) outwards penetrates through the waterproof hood (2); the beam-end embedded pipe sealing structure is characterized in that a filling layer is arranged in the annular clearance (B); a water drainage pipe (7) communicated with the annular clearance (B) is mounted on the pipe wall of the embedded pipe (3); a water inlet of the water drainage pipe (7) is positioned above the filling layer and is close to the upper surface of the filling layer. The embedded pipe sealing structure can prevent rainwater from entering the annular clearance between the embedded pipe and the stayed cable, and water gathered in the annular clearance can be discharged in time; the beam-end embedded pipe sealing structure is better in embedded pipe corrosion prevention effect.

Description

technical field [0001] The invention belongs to the field of bridges, and relates to a pre-embedded pipe sealing structure of stay cables or suspension cables at bridge girder ends. Background technique [0002] The anti-corrosion of stay cables or sling beam ends, especially how to effectively solve the problem of water accumulation and leakage in embedded pipes, has always been a difficult problem in the anti-corrosion of bridge stay cables or sling beam ends. At present, the commonly used method is to fill the polymer material to solve the anti-corrosion in the embedded pipe. Although this filling method has lasted for more than ten years, many problems have been exposed in this anti-corrosion method: for example, when some fluid polymer materials are used to fill the embedded pipe, due to the static pressure of 3-4m, the Under the influence of factors such as temperature and cable vibration, it is easy to degrade the polymer material, which in turn induces leakage; ther...

AI Technical Summary

Problems solved by technology

Although this filling method has lasted for more than ten years, many problems have been exposed in this anti-corrosion method: for example, when some fluid polymer materials are used to fill the embedded pipe, due to the static pressure of 3-4m, the Under the influence of factors such as temperature and cable vibration, it is easy to degrade the polymer material, which in turn induces leakage; there is also a problem of swelling with polyethylene sheath material

In addition, when some foam filling materials are filled, once rainwater seeps into the foam material, it is very easy to cause the foam to expand and harden, which not only fails to achieve the purpose of anti-corrosion, but also is difficult to remove in later maintenance

These problems will bring hidden dangers to the safe use of bridges.

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