Parallel steel wire guy cable system dehumidified by using dry air and capable of monitoring humidity of guy cable

Abstract

The invention relates to a parallel steel wire guy cable system dehumidified by using dry air and capable of monitoring the humidity of a guy cable. In the system, dry air generation equipment (2) is placed at a tower end (1) of a cable stayed bridge; external air (3) containing moisture is converted into dry air (5) through the dry air generation equipment (2); a dry air conveying master pipeline (6) which is connected with the dry air generation equipment (2) is arranged on a bridge tower of the cable stayed bridge and is connected with an anchor head (9) at a tower end of a stay cable (8) through a dry air conveying branch pipeline (7); the dry air (5) is injected into a cable body of the stay cable (8) and is output from an anchor head (11) at a beam end of the stay cable (8) to bring the moisture in the cable body of the stay cable (8) out; and a humidity sensor (12) is arranged at an air outlet port of the anchor head (11) at the beam end of the stay cable (8). According to the parallel steel wire guy cable system, the humidity in the stay cable can be actively reduced, and meanwhile, the humidity situation in the cable body of the stay cable can be monitored.

Description

technical field [0001] The invention relates to a parallel steel wire stay cable system. It belongs to the technical field of bridge structural parts. Background technique [0002] Cable-stayed cables are the main stress-bearing components of cable-stayed bridges. Traditional parallel steel wire cables twist multiple high-strength galvanized steel wires through 3 to 4 degrees, and then wind high-strength fiber tape to form steel wire bundles. A continuous high-density polyethylene sheath is hot-extruded on the bundle to form a cable body. Install anchors at both ends of the cable body and pour epoxy iron sand material to form the anchor head. The connection between the anchorage and the cable body is fully sealed to prevent moisture or harmful substances from entering the cable body, corroding the steel wire, and affecting the durability and reliability of the cable. The mechanism of this technology is to use reliable sealing technology to prevent moisture from entering t...

AI Technical Summary

Problems solved by technology

However, in actual engineering, it often occurs that the high-density polyethylene sheath is damaged during construction and other reasons cause water to enter the cable body, and the water that enters the cable body is trapped in the cable body due to the seal of the beam end anchorage. The relative humidity of the stay cable body is relatively high, which is the root cause of steel wire corrosion

Since the stay cables are covered with high-density polyethylene sheaths, the environment inside the stay cables cannot be accurately grasped, and corresponding humidity control measures cannot be taken

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