Bridge Engineering Blog & Technical Insights

Bridge structural condition parameter monitoring is not a short-term manual monitoring activity, but a long-term automatic monitoring activity. It requires that once sensors are installed at the measured parts of the structure and connected to power and signal lines, the sensor system can automatically collect structural parameters over a long period without human intervention. Therefore, the requirements for the long-term stability, reliability, environmental adaptability, and anti-interference ability of sensors in bridge structural condition parameter monitoring are much more stringent than those for conventional bridge construction monitoring and load testing. Furthermore, the wiring and network layout of the sensor system are also much more rigorous than those for construction monitoring and load testing. Different parameters have different specific requirements.

The bridge structural health monitoring system is an automated monitoring system integrating technologies such as the Internet of Things, sensors, wireless transmission, and cloud computing. By collecting structural and environmental data from key bridge components, the system monitors and analyzes the bridge's operational status and performance in real time. Based on the collected key data, it triggers early warning signals for severe anomalies in special weather conditions, traffic situations, or during bridge operation, providing a basis and guidance for bridge maintenance, repair, and management decisions to ensure the safety of the bridge during operation.

A new cable sealing system is adopted for the cable guide section at the beam end: a rain cover + (the new cable sealing system is installed at the outlet of the pre-embedded steel pipe). At the anchor end, anti-corrosion grease is applied to the anchor surface + anchor protective cover (from top to bottom). The joint with the cable body PE is sealed with silicone + rubber sealing ring.

1. What you see on the outer surface of the stay cable is only the PE protective sleeve covering it; the dimensions are similar, so they appear to be the same thickness. In reality, a single stay cable is made up of many steel wires or strands bundled together. Generally, a cable-stayed bridge has at least three types of stay cables, and large bridges may have even more.

Cable-stayed bridge cable girder anchorage common structure. In recent years, there has been a suspension bridge system in the engineering community that disperses the main span main cable on the bridge tower, and then maintains the balance of the bridge tower through side span cable-stayed cables. Various modern cable-stayed bridges across rivers, bays and other natural trenches are emerging.