System and method for testing prestress under anchor at front end of jack

A technology of prestressing and jacking under anchors, applied in measuring devices, force/torque/work measuring instruments, instruments, etc., can solve problems such as on-site accidents, unrestricted clips, damage to steel strands, etc., to prevent overstretching pull effect

Inactive Publication Date: 2019-11-12
四川升拓检测技术股份有限公司
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Problems solved by technology

[0008] The invention provides a system and method for testing the prestress under the anchor at the front end of the jack to solve the problem that the clips are not

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  • System and method for testing prestress under anchor at front end of jack
  • System and method for testing prestress under anchor at front end of jack
  • System and method for testing prestress under anchor at front end of jack

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[0038] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, under the condition of not conflicting with each other, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0039]In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from the scope of this description. Therefore, the protection scope of the present invention is not limited by the following disclosure. limitations of specific examples.

[0040] In the present invention, a displacement sensor and a force sensor are located at the front end of the jack to test the effective prestress under the ancho...

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Abstract

The invention discloses a system and method for testing the prestress under an anchor at the front end of a jack. The system comprises an anchor device, a displacement sensor, a force sensor, a tensioning jack, a steel stranded wire, an oil pump, a test host machine, a position limiting device and a clamping sheet. When the system performs test, the displacement sensor reads the displacement quantity of the clamping sheet in real time; the tensioning force value is detected by the force sensor in real time; the on/off state of the tensioning jack is controlled through the test host machine; the test host machine draws a test curve chart on the basis of the real-time detected displacement quantity and the real-time detected tensioning force value; and when the displacement quantity reachesa set value, the test host machine controls the oil pump to stop working, and the tensioning jack stops tensioning. The system and the method can solve the technical problems that during the test by the existing reverse-tensioning method, the clamping sheet is not limited, so that the over tensioning is caused, and steel stranded wire damage and field accidents occur.

Description

technical field [0001] The invention relates to the technical field of civil engineering quality and safety detection, in particular to a system and method in which a displacement sensor and a force sensor are located at the front end of a jack to test effective prestress under an anchor. 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. 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. Direct detection technology mainly includes: direct detection technology of prestressed tendon, stres...

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Application Information

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IPC IPC(8): G01L5/00
CPCG01L5/0033
Inventor 吴佳晔许自明何伟李科高宇陈靓张益雄刘秀娟王伟陈秀秀
Owner 四川升拓检测技术股份有限公司
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