Build a digital "neural network" for bridge pulling to help the scientific management and smart operation and maintenance of the old structure

Popular Network · Poster Journalist Li Jinshan Correspondent Pan Shaojun Jinan Report

Recently, under the commission of Yantai Highway Business Development Center, the in vitro cable monitoring project of the Fushuihe Bridge in Haiyang City, undertaken by Shandong Institute of Transportation, was implemented. Dynamic parameters such as and modal, after professional analysis, the effective cable value and decay of pulling can be obtained. You can timely notify the management and support unit for scientific disposal before the tension failure to ensure the structural safety of the reinforcement bridge.

At the construction site, the owner's representatives, the supervision unit and the monitoring unit jointly selected 15 mortar external cables of 3 -hole bridge as the monitoring object. After 4 days, the installation and debugging of the sensor monitoring the sensor were completed.

It is understood that the G204 Yantai Line Yantai Fushui River Bridge was built in 1989 and the bridge has a total length of 150m. At present, the design lotus can no longer meet the requirements of the existing traffic volume. In order to further improve the carrying capacity of the bridge, the in vitro prestress is used to use the in vitro prestance. The bridge is reinforced in horizontal bearing capacity. According to the requirements of the "Technical Specifications for Highway Bridge Structures" (JT/J1037-2022), the effective validity value of the prestressed stress of the bridge should be monitored for a long time, and then scientifically evaluates the reinforcement effect of the in vitro and the effectiveness of the later cable force to ensure the guarantee In vitro reinforcement bridge operation safety.

During the on -site guidance of the in vitro cable monitoring project, Li Zhong, the chief engineer of the Yantai Highway Business Development Center, said that relying on the G204 Yantu and Shanghai Line Fushuihe Bridge maintenance and transformation project to carry out project cooperation and technological innovation with Shandong Institute of Transportation. The independently developed passive magnetic electrical sensor is used in the inside of the bridge to monitor and the long -term service performance evaluation, providing reliable data support for the next step of the bridge maintenance work of the Yantai State Provincial Highway, and enhance the level of bridge maintenance.

"The passive magnetic electrical sensor used in this project is a new type of sensor that does not require on -site power supply, high accuracy, and high durability. It can effectively resist chlorine ion erosion in the seawater and water flow washed. Performance long -term monitoring and scientific assessment. "Cui Fengkun, an associate professor of the project leader of the project, introduced the in vitro cable monitoring technology. He said that the force sensor is equivalent to setting up a neural network that can perceive his own state for the bridge. The smart monitoring and active early warning of the bridge structure was implemented. The implementation of the project also provides new ideas for the scientific management and smart operation and maintenance of the Shandong Province's dangerous engineering structure.

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