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Reverse pulling method-based front-end steel strand displacement detection device

A technology for displacement detection and detection devices, which is applied in the direction of measuring devices, instruments, etc., can solve the problems of low test accuracy, and achieve the effects of avoiding connection failure, reducing losses, and accurate results

Pending Publication Date: 2019-05-17
四川升拓检测技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Indirect detection technologies mainly include: acoustic emission technology, electromagnetic effect detection technology, ultrasonic detection method, dynamic detection method and anchor end prestress test technology, and its test accuracy is relatively low

Method used

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  • Reverse pulling method-based front-end steel strand displacement detection device
  • Reverse pulling method-based front-end steel strand displacement detection device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Such as figure 2 As shown, a front-end steel strand displacement detection device based on the reverse pull method includes a limit cylinder 10 provided with a central hole, a stretch detection device for detecting the stretch of the steel strand 6, and the central hole is used for When passing through the steel strand 6 , the stretch detection device is installed on the limit cylinder 10 , and the inspection point of the stretch detection device is located at one end of the limit cylinder 10 for interacting with the anchor 13 .

[0036] At present, when the reverse pull method is implemented, the displacement detection of the steel strand 6 is generally realized by detecting the displacement of the jack 8. However, due to the non-pretensioned steel strand 6 between the clip 1 and the jack 8 Working section, this just causes the problem that steel strand 6 pulling displacement control difficulty is big when anti-pull method detection steel strand 6 prestress is implemen...

Embodiment 2

[0041] The present embodiment is further limited on the basis of embodiment 1, as figure 2 As shown, as a specific implementation of the displacement measurement of the contact type steel strand 6: the stretch detection device includes a displacement sensor 5, a sensor probe 3 and a steel strand holder 11, and the steel strand The holder 11 is used to be fixedly connected with the steel strand 6, and the connection point of the steel strand holder 11 on the steel strand 6 is located at: the steel strand at one end position where the limit tube 10 interacts with the anchorage 13 on line 6;

[0042] The sensor probe 3 is used as an intermediate connector between the steel strand holder 11 and the displacement sensor 5. When the steel strand 6 is pulled out, the steel strand holder 11 moves with the steel strand 6, and the steel strand 6 The movement displacement is transmitted to the displacement sensor 5 via the sensor probe 3 . Adopting this scheme aims to utilize the charac...

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Abstract

The invention discloses a reverse pulling method-based front-end steel strand displacement detection device. The displacement detection device comprises a limiting cylinder provided with a central hole, and a stretching quantity detection device used for detecting a stretching quantity of a steel strand; the central hole is used for penetrating through the steel strand; the stretching quantity detection device is installed on the limiting cylinder; and an inspection point of the stretching quantity detection device is positioned at one end, which is used for interacting with an anchorage device, of the limiting cylinder. The displacement detection device has the advantages that on the premise that the detection precision is guaranteed, the loss of bearing force of the steel strand due to pre-stress detection can be prevented or reduced, and the breakage risk of the steel strand can be reduced.

Description

technical field [0001] The invention relates to the technical field of civil engineering quality and safety detection, in particular to a front-end steel strand displacement detection device based on the reverse pull method. Background technique [0002] The size of the prestress in the prestressed concrete structure is the main index affecting the normal performance of the structure during the service period. At present, the detection methods commonly used at home and abroad are roughly divided into two categories: indirect detection and direct detection. [0003] Indirect detection technologies mainly include: acoustic emission technology, electromagnetic effect detection technology, ultrasonic detection method, dynamic detection method and anchor end prestress test technology, and its test accuracy is relatively low. [0004] Direct detection technology mainly includes: direct detection technology of prestressed tendon, stress release method and reverse pull method. Amon...

Claims

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Application Information

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IPC IPC(8): G01B21/02
Inventor 吴佳晔许自明张亮高宇
Owner 四川升拓检测技术股份有限公司
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