Starry Night is responsible for 100 ketts to continuously carry out cable-stayed bridge inspection service.

Release time:

2022-08-17

In July, the Baikete testing team started the non-destructive testing service of Chengdu Tongjin South Bridge, which is a landmark building across Fuhe on the southern extension line of Hongxing Road in Chengdu High-tech Zone. It is an urban expressway bridge with a design speed of 60 km/h, a bridge span of 44,150,55 meters and 12 lanes in both directions. The maximum width of the road is 74 meters. The bridge creatively designed the "double longitudinal box lattice beam" combination structure, unique shape, structural design and size optimization, cleverly maintained the three-dimensional spatial mechanical balance of the structure, because of its main girder bending, north and south arch ribs camber and asymmetry, there is no horizontal connection between the arch ribs above the bridge deck, so that its structure and force is very complex.

Starry Night is responsible for 100 ketts to continuously carry out cable-stayed bridge inspection service.

As the cross-river link point of the main road in Chengdu, Tongjin South Bridge undertakes the task of large-flow traffic diversion, and its stay cableAsBridgeMain bearing structure“Shoulder”Security Mission. because of itsLong-term tension,plus easybyWind-loaded wear,Precipitation, low temperature, sun and other natural environment invasionAnd shakeinfluence,The stress of stay cables is constantly changing, and the strength of stay cables will decrease due to corrosion and broken wires. Steel wire fracture is a direct consequence of long-term corrosion fatigue of stay cables. When the fracture corrosion reaches a certain proportion, it will no longer meet the Technical Conditions for Steel Strand Cable of Stay Cables. Therefore, scientific detection and analysis become the master stay cableImportant measures of "physical" condition.

Beckett insists on innovative exploration, aiming at stay cablesBroken wire caused by fatigue,RustingDifficulties in detection, carry outMagnetization of large diameter cable,magnetic flux leakageandResearch on Magnetic Flux Detection Technology,developed through efficient magnetic pole arrangement, take the magnetizingDetermination and monitoring of slopePullCord corrosion,Broken wire conditionofHigh Precision Nondestructive Testing Technology,And jointly with Tsinghua University, he presided over the compilation of the "Technical Guide for Automatic Magnetic Flux Leakage Detection of Highway Bridge Sling", which both fill the gaps in this field in the implementation of technology and standards. At present, the technology has been widely used inNanjing Second Yangtze River Bridge,Chongzhou Jinma Lake Bridge,ChengduTianfu-South Station City InterchangeWaitA variety of cable bridge testing items. Hundred Cert Inspection PersonnelThrough testing operations and data analysis, the degree of internal corrosion and broken wire distribution of the stay cable are accurately determined,With professional technical services and detailed explanation, to help bridge managers masterstay cable"Health"StatusAssessment Technology;Combining practical experience with theoretical guidance,Assist the bridge management unit to improve the maintenance and management level and scientifically arrange the maintenance and replacement of stay cables.