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Prestressed pipe segment assembly with capability of long-term monitoring of internal steel cable stress and construction method thereof

A prestressed pipeline and prestressed technology, applied in measuring devices, force/torque/work measuring instruments, instruments, etc., can solve the problems of low accuracy, self-weight, and high cost of pressure sensors, and achieve high feasibility and low cost. , the effect of high detection accuracy

Active Publication Date: 2017-12-01
ZHEJIANG PROVINCIAL INST OF COMM PLANNING DESIGN & RES CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The vibration method is suitable for long cables outside the body; the pressure ring method needs a through-hole pressure sensor on the component under test, and the disadvantages are that the cost of the pressure sensor is high, the weight is large, and the accuracy is not high

Method used

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  • Prestressed pipe segment assembly with capability of long-term monitoring of internal steel cable stress and construction method thereof
  • Prestressed pipe segment assembly with capability of long-term monitoring of internal steel cable stress and construction method thereof
  • Prestressed pipe segment assembly with capability of long-term monitoring of internal steel cable stress and construction method thereof

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Embodiment Construction

[0029] In order to describe the present invention more specifically, the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] Such as Figure 1 ~ Figure 3 As shown, the present invention can long-term monitor the prestressed pipeline segment assembly of internal steel bundle stress, including a prestressed pipeline 1, a magnetic flux protection shell 2, an excitation coil 3, an induction coil 4, a temperature sensor 5 and a coil skeleton 6; wherein:

[0031] The prestressed pipe 1 adopts prefabricated stainless steel pipes for passing through the prestressed steel strands, and is prefabricated in the factory; the diameter of the pipes is smaller than that of ordinary corrugated pipes, and its length is determined by the actual number of steel strands minus the length of the entire pipe segment. Remove the length of the coil bobbin 6; the length of the entire pipeline segm...

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Abstract

The invention discloses a prestressed pipe segment assembly with capability of long-term monitoring of internal steel cable stress and a construction method thereof. The assembly is composed of a prestressed pipe, a magnetic flux protective shell, an excitation coil, an induction coil, a temperature sensor and a coil skeleton. The prestressed pipe is used for realizing penetration of a steel cable. The magnetic flux protective shell coating the outside of a skeleton is used for shielding interference caused by a magnetic field and other signals. The excitation coil and the induction coil wind around the coil skeleton. The excitation coil is used for generating a magnetic field. The induction coil is used for measuring a change of a magnetic flux, generating a sensing voltage, transmitting the voltage to an external signal acquisition processing device, and measuring a prestressed force of the steel cable. The temperature sensor is used for measuring the temperature around the steel cable. Compared with the prior art, the prestressed pipe segment assembly and the construction method have the following beneficial effects: the stress state of the prestressed reinforced steel bar at construction and operation stages can be monitored for long time and any processing or damage on a testing piece is not needed; the maintenance cost is low, the service life is long; the anti-interference capability is good; the measurement precision is high; and the promotion value is great.

Description

technical field [0001] The invention belongs to the field of prestressed pipeline materials and structures, and in particular relates to a prestressed pipeline segment component capable of long-term monitoring of internal steel bundle stress and a construction method thereof. Background technique [0002] At present, prestressed concrete structures are widely used in bridges and long-span structural engineering, especially in the field of bridges. About 70% to 80% of existing highway, railway and municipal bridges are prestressed concrete bridges. PC bridge has become the most common bridge type in bridge design, construction and maintenance at the present stage. [0003] Due to the influence of factors such as construction, material properties, and environmental conditions, the prestress of prestressed steel bars will gradually decrease. This phenomenon is called prestress loss. General prestress loss factors include prestress loss caused by friction between prestressed st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L5/00
CPCG01L5/00
Inventor 王昌将叶建龙
Owner ZHEJIANG PROVINCIAL INST OF COMM PLANNING DESIGN & RES CO LTD
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