De-icing and anti-icing system and method for steel strand cables of cable-stayed bridge

Abstract

The invention discloses a cable-stayed bridge steel strand inhaul cable ice removal and ice prevention system and method and relates to the field of bridge operation safety protection. The system comprises a heating plate and a sensor set. The heating plate is wrapped on a cable guide tube at the bottom of an inhaul cable. The sensor set comprises a temperature sensor, a temperature sensor and anicing sensor which are arranged on the surface layer of the top end of the inhaul cable. The bottom of the cable guide tube at the bottom of the inhaul cable is provided with a vent hole. The upper portion of the cable guide tube at the top of the inhaul cable is provided with a vent hole. The vent hole in the cable guide tube at the bottom of the inhaul cable and the vent hole in the cable guidetube at the top of the inhaul cable both communicate with the interior of the inhaul cable. Through the cable-stayed bridge steel strand inhaul cable ice removal and ice prevention system and method,the ice removal and ice prevention effect on a cable-stayed bridge can be effectively achieved.

Description

technical field [0001] The invention relates to the field of bridge operation safety protection, in particular to a deicing and anti-icing system for steel strand cables of a cable-stayed bridge and a deicing and anti-icing method for steel strand cables of a cable-stayed bridge. Background technique [0002] Cable-stayed bridges have the advantages of large spanning capacity and beautiful appearance. They are one of the main bridge types of long-span bridges in my country's transportation system. At present, more than 200 cable-stayed bridges have been built in China, accounting for about one-third of the total number of cable-stayed bridges in the world. One of them, the cable-stayed bridge is the main load-bearing and force-transmitting component of the cable-stayed bridge, which is located on the bridge deck. [0003] During the operation of cable-stayed bridges, (frozen) rain, snow, icing and other phenomena caused by climate reasons in the central and northern regions o...

AI Technical Summary

Problems solved by technology

For the cable-stayed cables, some rain and snow will remain on the cable after the rainy and snowy weather, and it will freeze when the temperature is lower than 0°C; ), the temperature of the bridge deck is still above 0°C or there is no icing phenomenon, and the high altitude of the cable near the bridge tower is already below 0°C, the rain and snow left on the cable condenses into ice, and the surface of the cable is icy except In addition to damage to the structure of the cable, the ice cubes condensed on the cable will be affected by external factors such as temperature rise, wind blowing, or normal vibration of the cable, causing the ice to fall from the cable. Due to the high speed of the fall, it will cause a major safety hazard to the vehicles running normally on the bridge deck, and even cause a series of traffic accidents in severe cases, causing major personal and property losses. The resulting public opinion is extremely unfavorable to social stability

In recent years, there have been many incidents that have affected the traffic safety of bridges due to the ice loss of the cable stays. For example, on January 30, 2015, the cable of the main bridge of the Jingyue Yangtze River Bridge lost ice and damaged several vehicles. The motor vehicle, the bridge deck was covered by ice slag, which led to traffic control; in January 2015 and January 2018, icicles on the cable stays of Wuhan Erqi Yangtze River Bridge fell from high altitude, damaging several vehicles and affecting traffic safety; The main bridge of Bayi Bridge in Nanchang also suffered from ice falling from the cable stays, smashing more than 30 motor vehicles and injuring pedestrians, endangering traffic safety and personal and property safety

In addition, the snow and icing of the stay cables will change the section shape of the stay cables, thereby changing its aerodynamic characteristics, changing the wind-induced vibration response of the bridge, and threatening the safety of the bridge structure

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