System and method for detecting pile body integrity based on low-coherence interferometry

A low-coherence interference and integrity detection technology, which is applied in the field of pile integrity detection system, can solve the problems of high maintenance cost, poor stability, and low accuracy, and achieve the goal of reducing maintenance cost, good stability, and high accuracy Effect

Active Publication Date: 2017-07-18
DONGHUA UNIV +1
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Problems solved by technology

[0010] The technical problem to be solved by the present invention is to provide a pile body integrity detection system and method based on low-coherence interference technology with high accuracy, good stability, reduced maintenance

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  • System and method for detecting pile body integrity based on low-coherence interferometry
  • System and method for detecting pile body integrity based on low-coherence interferometry
  • System and method for detecting pile body integrity based on low-coherence interferometry

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Embodiment Construction

[0043] In order to make the present invention more obvious and comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.

[0044] The present invention is a pile integrity detection system based on low coherence interference technology, such as Figure 1-Figure 4 As shown, it includes a low-coherence interferometer sensing system and a pile body 11, the low-coherence interferometer sensing system is provided with a signal arm 5, the signal arm 5 is provided with a sensor assembly 6, and the pile body 11 is provided with a reserved hole 12 and a packaged signal arm for measuring the amount of strain change, the packaged signal arm and the signal arm 5 are both arranged in the reserved hole 12 .

[0045] The low-coherence interferometer sensing system includes a broadband light source 1, and the broadband light source 1 is connected to an optical path coupler 4 through an optical path 3. After receiving the signal, the optic...

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Abstract

The invention discloses a system for detecting the pile body integrity based on a low-coherence interferometry. The system is characterized by comprising a low-coherence interferometer sensing system and a pile body, wherein the low-coherence interferometer sensing system is provided with a signal arm; the signal arm is provided with a sensor assembly; a preformed hole and a packaged signal arm for measuring strain variation are arranged in the pile body; and the packaged signal arm and the signal arm are arranged in the preformed hole. The pile body integrity is detected through placing a low-coherence interference-type sensor into the preformed hole of the pile body based on the low-coherence interferometry, so that the system is high in accuracy, good in stability, not susceptible to interference and wide in application range, and the maintenance cost is reduced.

Description

technical field [0001] The invention relates to a pile integrity detection system and method based on low-coherence interference technology, and belongs to the field of intelligent detection of geotechnical engineering. Background technique [0002] In the foundation engineering of geotechnical engineering, pile foundation is an important form of foundation foundation. In recent years, due to the construction of a large number of high-rise buildings, deeper foundation pits are required, and a large number of deep and large-diameter pile groups are required for bearing. Because the pile foundation is deeply buried in the underground soil layer, it is a hidden project. The quality of the pile foundation and whether it has defects directly determines its bearing capacity, and it is not easy to be detected. Construction accidents caused by pile foundation defects are very harmful. In traditional pile foundation detection methods, such as point measurement methods such as pre-em...

Claims

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Application Information

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IPC IPC(8): G01N21/95G01K11/32G01B11/16
CPCG01B11/161G01K11/32G01N21/95
Inventor 张一帆刘子雄洪成雨
Owner DONGHUA UNIV
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