Yingzhou Bridge is the first and only bridge in Luoyang that combines the construction monitoring and operation health monitoring of the main bridge.
In the early stage of Yingzhou Bridge construction, the monitoring personnel of Southeast University buried 369 strain sensors and 9 large-tonnage cable force sensors in key parts of the bridge. During the bridge construction, the stress change information of each control section will be transmitted to the monitoring room under pier 2 1 of Yingzhou Bridge through optical fiber signals.
"2 1 pier" is a magical place in the view of Professor Miao Changqing, the representative of Yingzhou Bridge. If the sensor is equivalent to the probe that moves on the human body when people do B-ultrasound, then "Pier 2 1" is the computer connected with the probe. Doctors can judge whether the human body is healthy through the pictures displayed by the computer, and the monitoring personnel of Yingzhou Bridge can decide whether the stress state of the main bridge construction structure of Yingzhou Bridge needs to be adjusted through the computer simulation analysis under the pier of 2/kloc-0.
"After the completion of Yingzhou Bridge, these buried sensors can continue to be used as probes for bridge operation health monitoring, providing the most intuitive data for daily maintenance and maintenance of the bridge." Ma Chaoxin, the chief commander of the project, proudly said, "Because we don't need to re-control these facilities on the bridge, we have saved at least 3 million yuan. At present, this technology of effective combination of construction monitoring and post-operation health monitoring is still in a leading position in China. "
Yingzhou Bridge is the first bridge in Luoyang to adopt various bridge types.
Yingzhou Bridge integrates five bridge types: simply supported beam, continuous bridge approach, through reinforced concrete tied arch of main bridge, triangular rigid frame of main bridge and bird-shaped combined tied arch of main span. Such a complex structure has made the builders move a lot of brains.
The triangular area of the main pier in the middle of the bridge spans 46 meters and the smooth concrete is 2600 square meters. Can you "stand firm"? According to the bridge completion ratio of 1:5, the researchers of the Bridge Science Research Institute of China Railway Bridge Bureau spent more than 600,000 yuan to establish a solid model of the triangle area, and tested the stress of the completed bridge in advance, which is the first time in the history of Luoyang Bridge construction to adopt a model test.
"Only bridges with unusually complex structures will take such a cautious approach. It's the first time I've seen such a complicated project as the Yingzhou Bridge. " Ma Decai, executive deputy commander and senior engineer of Yingzhou Bridge, who has decades of experience in municipal construction and graduated from Tongji University with a major in road and bridge design, said.
This complexity has brought great difficulty to the construction, and the construction party even used the largest gantry crane in Luoyang's bridge construction history. It is more than 50 meters high and nearly 50 meters wide, and the lifting weight can reach 50 tons at one time. It is a veritable monster.
As the first inverted triangular parabolic arch bridge in China, Yingzhou Bridge has applied for a national patent for its exterior design.