Dynamic real-time monitoring method for concrete bridge prestressed tendon tensioning force and special prestress construction system

A prestressed tendon, real-time monitoring technology, applied in bridges, bridge materials, bridge construction, etc., can solve problems such as abnormal correspondence, collapse of beam ends, and inability to calculate by itself
CN105603876AActive Publication Date: 2016-05-25CHINA RAILWAYS CORPORATION +3
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA RAILWAYS CORPORATION
Publication Date
2016-05-25

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Abstract

The invention belongs to bridge construction, and particularly relates to dynamic real-time monitoring method for concrete bridge prestressed tendon tensioning force and a special prestress construction system. The dynamic real-time monitoring method for the concrete bridge prestressed tendon tensioning force includes the steps of initializing and real-time dynamic control loading. The prestress construction system comprises at least one tensioning device, and each tensioning device comprises a hydraulic station, a reversing valve bank, a jack, an A / D data collecting module, a PLC, a central processing unit, a human-computer interface, a direct force measuring device, a hydraulic force measuring device, a prestressed tendon elongation measuring device, a friction resistance test device and a security alarm device. The double-control requirement, difficult to met in the prior art, for taking stress control as the principle thing and an elongation value as a checking item is met, the dynamic real-time monitoring method has the advantages that construction quality and safety can be effectively ensured, and problems found in the tensioning process can be solved in time.
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Description

technical field

[0001] The invention belongs to bridge construction, in particular to a dynamic and real-time monitoring method and a special prestressed construction system for the tension force of prestressed tendons of concrete bridges. Background technique

[0002] In the construction of high-speed railways in my country, bridges occupy an absolute proportion in the length of the lines because of their good ride comfort, the line is not easy to settle, the land is saved, and the operation is safe. The prestressed concrete bridge has the characteristics of strong crack resistance, good impermeability, high rigidity, high strength, good shear resistance and fatigue resistance. Both cracking and deflection reduction are very effective, allowing bridge structures to be designed more economically, lightweight and aesthetically pleasing.

[0003] With the application of prestressing technology in modern bridge construction, the quality and performance of bridges have been gre...

Claims

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