Long-gauge FBG (Fiber Bragg Grating) based settlement joint two-dimensional deformation and opposite inclination monitoring method

A deformation monitoring and settlement seam technology, applied in measurement devices, instruments, optical devices, etc., can solve problems such as large deformation detection errors and discontinuous detection data, and achieve small monitoring and calculation errors, concise technical solutions, and large promotion. and use value effects

Active Publication Date: 2015-05-13
SHIJIAZHUANG TIEDAO UNIV
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Problems solved by technology

[0007] Aiming at the deficiencies of the existing technology in the actual use of settlement joints, such as large deformation detection errors and discontinuous detection data, the present invention provides a two-dimensional deformation and anti-tilt monitoring method of settlement joints based on long gauge length FBG

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  • Long-gauge FBG (Fiber Bragg Grating) based settlement joint two-dimensional deformation and opposite inclination monitoring method
  • Long-gauge FBG (Fiber Bragg Grating) based settlement joint two-dimensional deformation and opposite inclination monitoring method
  • Long-gauge FBG (Fiber Bragg Grating) based settlement joint two-dimensional deformation and opposite inclination monitoring method

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with accompanying drawing.

[0039] In the laboratory, two steel plates are used to simulate the settlement joint 5. In order to control the deformation of the steel plates, the steel plates are installed on the chute, and three dial gauges are provided on the edge of the steel plates to test the actual displacement value of the steel plates and compare with the test of the embodiment. Comparing calculated values.

[0040] (a) Two long-gauge-length FBG sensors are arranged crosswise on both sides of the settlement joint

[0041] according to figure 1 For the sensor I3 and the sensor II4 of the embodiment that are arranged symmetrically on both sides of the settlement joint 5, both the sensor I and the sensor II are long-gauge-distance FBG sensors. is the angle between the sensor I and the horizontal line, β is the angle between sensor II and the horizontal line, since sensor I and sensor II are not s...

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Abstract

The invention relates to the settlement joint two-dimensional deformation detection technical field, particularly to a long-gauge FBG (Fiber Bragg Grating) based settlement joint two-dimensional deformation and opposite inclination monitoring method which aims at overcoming the defects that the deformation detection error is large and detection data are discontinuous in the actual use process of settlement joints in the prior art. A long-gauge FBG sensor is distributed and an average strain equation of the horizontal direction, the vertical direction and the two-dimensional deformation after the movement of a settlement joint is listed to solve the opening distance x of the settlement joint in the horizontal direction and the dislocation distance y of the settlement joint in the vertical direction. Compared with the traditional manual instrument monitoring, the long-gauge FBG based settlement joint two-dimensional deformation and opposite inclination monitoring method is high in test accuracy and continuous in data and can be popularized and utilized in engineering.

Description

technical field [0001] The invention relates to the technical field of two-dimensional deformation monitoring of settlement joints, in particular to a two-dimensional deformation and anti-tilt monitoring method of settlement joints based on long gauge distance FBG. Background technique [0002] In recent years, with the continuous acceleration of my country's urbanization process, the city's territory has continued to expand in all directions, and extended to high-altitude and underground spaces, resulting in an increasing density of urban buildings and continuous compression of construction space. Common engineering projects in urban construction, such as deep foundation pits of high-rise buildings, construction of subway tunnels and various municipal pipelines, all have the characteristics of large engineering volume and wide range of construction influence, which will inevitably cause damage to surrounding existing buildings. certain influence. Therefore, in the construc...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/16G01B11/02
Inventor 张浩沈圣段君淼王子龙莫振泽周立波
Owner SHIJIAZHUANG TIEDAO UNIV
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