Bridge monitoring

1. Monitoring Background

    As an important part of transportation, with the development of my country's transportation industry, its safety, durability and normal use function are more and more concerned by people. my country is a big country of bridges. According to the latest statistics from the Ministry of Communications, as of the end of 2019, there were about 878,300 highway bridges in my country (excluding municipal bridges). There are many factors affecting bridges, such as human factors, long-term overloading of vehicles, material degradation, natural disasters, etc., which lead to various diseases such as reduced bearing capacity and structural damage of active bridges, and lack of timely management and maintenance. If the damage cannot be detected and repaired in time, it will affect the driving safety and shorten the service life of the bridge at light level, and lead to the sudden damage and collapse of the bridge in severe cases. Therefore, it is particularly urgent to establish a set of intelligent online monitoring system for bridges to detect the damage of bridge structures in time.

2. System overview

       Shenzhen Cyons Technology has many years of bridge monitoring experience, and has established an intelligent, information-based and automated bridge online monitoring system, which can fully grasp the safety status of bridge construction and operation, and provide bridge construction, daily maintenance, management and emergency response. Disposal plays a huge role. Based on the cloud computing service center, it can accommodate all bridge monitoring systems in the region, form a regional bridge health monitoring platform, and realize unified monitoring and management of all bridge structures in the region.       

3. Main monitoring content

     1. Geometric alignment monitoring: arch rib alignment monitoring, girder deflection monitoring, axis offset measurement;

     2. Stress and strain monitoring: beam body strain, pylon strain, main arch strain, pier strain, etc.;

     3. Cable force/tension monitoring: tie rod tension, boom tension, anchor cable stress, etc.;

     4. Environmental monitoring: wind speed and direction, temperature and humidity, rainfall, visibility, corrosion

     7. Offset monitoring: tower top offset, arch offset, vault offset;

     8. Vibration monitoring: beam vibration, vault vibration, bridge tower vibration, boom (cable) vibration;

     9. Load monitoring: dynamic weighing system;

     10. Inclination monitoring: the bridge tower is tilted, the bridge pier is tilted, and the beam body is tilted;

     11. Other monitoring: crack monitoring, fatigue monitoring, ship collision, cameras.

4. Schematic diagram of monitoring

V. List of monitoring projects

 6. Monitoring basis

    "Municipal Bridge Structure Monitoring Technical Standard DB22∕T 5035-2020"

    "Code for Design of Bridge Structural Health Monitoring System DB32∕T 3562-2019"

    "Technical Regulations for Bridge Structure Monitoring System DG∕TJ 08-2194-2016"

    "Technical Regulations for Highway Bridge Structure Safety Monitoring System JT/T 1037-2016"

    "Technical Specification for Building and Bridge Structure Monitoring GB50982-2014"

    "Design Standard for Structural Health Monitoring System CECS-333-2012"

Seven, the realization of the function

    1. Full life cycle monitoring: Realize the full life cycle monitoring of bridges, including related content during construction and operation, such as strain, temperature, linearity during construction, strain, linearity, vibration, environment, and stress during operation. Data storage and analysis, comprehensive display of GIS+BIM or GIS+4D models, grasp the status of the whole life cycle of bridges, and provide decision-making basis for management;

    2. Automatic report push: In addition to the real-time display of monitoring results, the system will automatically generate the corresponding daily report, which supports one-click download. Once the data exceeds the threshold, it can give an early warning and notify relevant units to take corresponding measures in a timely manner;

    3. Hierarchical early warning: Set different early warning levels according to the requirements. When the data is abnormal, the early warning information will be automatically triggered according to the settings, including platform push, SMS and email notification to the corresponding person;

    4. Accumulate bridge status data: Provide necessary decision-making basis for long-term operation, maintenance, repair, and reinforcement of bridges, and provide basis for bridge safety status assessment after emergencies. At the same time, AI algorithms are used to predict the future time period of bridges. structural response and development;

    5. Provide reference basis: verify the bridge design and construction theory and construction technology, so as to improve relevant design and construction technical regulations and ensure the safety of bridge use.