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Real-time pre-stress monitoring type clip anchoring tool and anchoring tool tension method thereof

A real-time monitoring and prestressing technology, which is applied in the fields of construction, building structure, and building materials processing, can solve the problems of difficult real-time monitoring of prestressed anchors and the inability to accurately ensure the tension and control stress of prestressed tendons, and achieve tension High anchor precision, convenient construction, and the effect of timely supplementing the loss value of prestress

Active Publication Date: 2015-09-09
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention solves the problem that existing anchors are difficult to monitor the loss of prestressed anchors in real time and cannot accurately ensure the tension control stress of prestressed tendons, and further provides a prestressed real-time monitoring clip anchor and its anchorage tensioning method

Method used

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  • Real-time pre-stress monitoring type clip anchoring tool and anchoring tool tension method thereof
  • Real-time pre-stress monitoring type clip anchoring tool and anchoring tool tension method thereof
  • Real-time pre-stress monitoring type clip anchoring tool and anchoring tool tension method thereof

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specific Embodiment approach 1

[0017] Specific implementation mode one: as Figure 1~5 As shown, the prestressed real-time monitoring clip anchor of this embodiment includes an outer nut 1, an inner anchor ring 2, a monitor 7, a connector 6 and eight resistance strain gauges 5, and it is characterized in that: the clip anchor It also includes a wedge-shaped cone 3, the outer nut 1 is a regular octagonal nut, the outer nut 1 is processed with a wire channel 4, the outer surface of the inner anchor ring 2 is processed with an outer thread 2-1 along its length direction, and the inner anchor One end of the ring 2 is processed with a wedge-shaped hole 2-3, and the other end of the inner anchor ring 2 is processed with a center hole 2-4. The wedge-shaped hole 2-3 is coaxial and communicated with the center hole 2-4 of the inner anchor ring 2. The small end of the hole 2-3 is connected with the central hole 2-4 of the inner anchor ring 2, and the outer surface of the inner anchor ring 2 is processed with a regula...

specific Embodiment approach 2

[0018] Specific implementation mode two: as figure 2 As shown, in this embodiment, the two strain gauges 5 provided on each side of the strain gauge 5 are arranged perpendicular to each other, adopt temperature self-compensation, and connect to form a Wheatstone full bridge. Such a design can increase the sensitivity of the bridge to 2(1+μ) times, where μ is the Poisson’s ratio of the inner nut 2 of the anchorage. Adds a bend effect. Other components and connections are the same as those in the first embodiment.

[0019] Poisson's ratio: The absolute value of the ratio of the transverse strain caused by a uniformly distributed longitudinal stress to the corresponding longitudinal strain within the proportional limit of the material.

specific Embodiment approach 3

[0020] Specific implementation mode three: as figure 2 As shown, the axial position of the regular octagonal groove 2-2 in this embodiment corresponds to the axial position of the small end of the wedge-shaped hole 2-3. Such a design can avoid too much weakening of the inner nut 2 in the circumferential direction, and can also prevent the inner nut 2 from being too close to the bottom, which will affect the overall mechanical performance of the anchorage. Other compositions and connections are the same as those in Embodiment 1 or 2.

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Abstract

The invention provides a real-time pre-stress monitoring type clip anchoring tool and an anchoring tool tension method thereof, relates to a clip anchoring tool and an anchor tool tension method, and aims at solving the problems of the exiting anchoring tool that the loss of the pre-stress anchoring tool is difficult to monitor on real time and the tension control stress of pre-stressed ribs cannot be accurately ensured. The device is that a regular octagonal groove is processed in the outer surface of an inner anchoring ring in the radial direction; a conductor hole channel is corresponding to the axial position of the regular octagonal groove; a monitoring instrument is connected with eight resistance straining sheets through connectors; eight resistance straining sheets are arranged on four side surfaces at intervals in the regular octagonal groove; two resistance straining sheets are arranged on each side surface provided with the resistance straining sheet. The method comprises the steps of 1, mounting the anchoring tool; 2, tensioning a jack; 3, repeating step 2 according to the display value of the real-time pressure monitoring instrument until reaching sigma con; 4, connecting the real-time stress monitoring instrument during using the structure, and operating according to the step 3. The device and the method are applied to the pre-stress monitoring and the tensioning of the pre-stressed ribs.

Description

technical field [0001] The invention relates to a prestressed real-time monitoring clip anchor and an anchor tensioning method thereof, belonging to the technical field of civil engineering. Background technique [0002] In order to make the prestressed concrete structure achieve the predetermined performance during the construction of the prestressed tendons and the service of the structure, and ensure the safety and applicability of the prestressed concrete structure, the effective prestress of the prestressed tendons arranged in the structure should be controlled. Make it consistent with the design calculation results. Because the prestressed concrete structure will produce anchorage and prestressed tendons retraction during the tensioning process of prestressed tendons, the anchoring process of prestressed tendons at the tension end is also the process of prestressed anchorage losses caused by prestressed tendons shrinkage; The creep and shrinkage of concrete in the lon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04G21/12
Inventor 周威胡亚辉郑文忠王钧孙飞虎耿相日徐志鹏
Owner HARBIN INST OF TECH
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