China News Service, Guangzhou, May 11 (Cai Minjie) In response to the news that the wire of the Humen Bridge sling wire broke caused the vibration, the management of the Humen Bridge said on May 11: the news is not true, the No. 38 sling has been released in 2019 Replacement is completed in year.
It is understood that during the use of bridge steel components, under the influence of various factors such as vehicles, wind, seismic loads and the environment, different degrees of corrosion and local damage will occur, and the material properties will continue to decay. The management of the Humen Bridge stated that in order to ensure the safety of the bridge, the management will inspect the bridge every year since the bridge was completed and opened to traffic, and deal with the discovered diseases in a timely manner.
In February 2019, during the inspection of the bridge, the management of the Humen Bridge discovered that a sling outside the No. 38 sling on the westbound was partially abnormal, and organized a professional inspection unit to detect the sling and the sling in the surrounding area. .
The test found that some steel wires of the westbound No. 38 sling had corroded and broken wires. To this end, the Humen Bridge initiated a safety emergency response, and completed the installation and replacement of No. 38 slings on westbound and eastbound from March to April 2019. The structure of the suspension bridge is safe after being checked by the professional design unit. The picture posted on the net was taken in 2019 and has nothing to do with the vibration.
It is reported that the main span of the suspension bridge of Humen Bridge is 888 meters, with a total of 288 slings. In view of the fact that the sling has reached the designed service life, the management of the Humen Bridge will start a full replacement of the sling from March 2019. As of April 28, 2020, 128 slings have been replaced.
The Humen Bridge is a cross-sea bridge connecting Nansha District of Guangzhou City and Humen Town of Dongguan City in Guangdong Province, connecting both sides of the Pearl River and communicating with important cities such as Shenzhen and Zhuhai. The Humen Bridge started construction in 1992 and was opened to traffic in 1997.
On the 5th, the Humen Bridge was abnormally shaken, the suspension bridge deck swayed relatively large, and the amplitude was relatively obvious, which caused discomfort to the traffic. In the early morning of the 6th, Guangdong Provincial Transportation Group said that according to the preliminary judgment of the expert group, the main reason for the vibration of the suspension bridge of Humen Bridge is that the continuous installation of water horses along the span of the bridge changes the aerodynamic shape of the steel box girder under certain wind environmental conditions. Next, the bridge vortex phenomenon is generated. (Finish)