Cable middle point prestress intelligent control adjustment device and its cable force regulation method

Abstract

The invention discloses an intelligent control and adjustment device for prestress at the middle point of a cable and a cable force control method thereof. Servo transmission mechanism and intelligent control system; the cable middle point prestress intelligent control adjustment device provided by the present invention is installed and connected to the middle break point of the cable in the existing large-span building structure, and the servo oil pump is used to control the servo oil pump to push the cable through the intelligent control system The tension piston rod at the end of the breakpoint is driven by the servo transmission mechanism to screw in or unscrew the adjustable bolt to realize the intelligent adjustment of the cable force. The tension cylinder only applies oil pressure when the cable force is adjusted, and there is no oil pressure at ordinary times. , can effectively avoid oil leakage; screwing in and out of the adjustable bolts is carried out under the condition that the adjustable bolts are not stressed, and the rotational torque output by the servo transmission mechanism is small, the overall structure is simple and reliable, easy to popularize and use, and the adjustment effect is good .

Description

technical field [0001] The invention relates to the technical field of prestressed structures in civil engineering, and is used for the intelligent control and adjustment of the prestressed cable force of the prestressed structure, and more particularly relates to an intelligent control and adjustment device for the prestressed intermediate point of a cable and its cable force regulation method. Background technique [0002] Prestressed structures are widely used in my country, especially in large-span bridges, large-span spatial structures, and large-span concrete structures. Prestressed structures need to be adjusted due to prestressed tendons relaxation, concrete shrinkage and creep, and structural load changes. That is to say, the cable force must be adjusted. The cables of many cable-stayed bridges are adjusted during use. Adjusting the cable force often interrupts traffic and affects the normal use of the project. Many large-span space structures have also occurred duri...

AI Technical Summary

Problems solved by technology

[0002] Prestressed structures are widely used in my country, especially long-span bridges, long-span space structures, and long-span concrete structures. Prestressed structures need to adjust the prestress value due to prestressed tendon relaxation, concrete shrinkage and creep, and structural load changes. That is to say, to adjust the cable force. The cables of many cable-stayed bridges are used to adjust the cable force. Adjusting the cable force often interrupts traffic and affects the normal use of the project. Many large-span spatial structures have also occurred during use. To adjust the phenomenon of cable force, the adjustment of cable force in spatial structure also requires complex technology, which is more complex than the prestressed tension in the construction stage.

[0003] With the application of intelligent systems and the improvement of automatic control technology, it has become possible to realize intelligent control and automatic adjustment of prestressed structural cable forces. However, there is no effective regulating device for prestressed structural cable forces on the market. The control of prestressed cable force in prestressed structures is of great significance to the stability of long-span building structures

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