Long-term deformation monitoring method and device

Abstract

The invention provides a long-term deformation monitoring method and device, which relates to the field of building structure. The long-term deformation monitoring method includes the following steps:obtaining an image of a pattern on a foundation pile used to monitor whether the foundation pile deforms; and obtaining the deformation state of the foundation pile based on the image. According to the long-term deformation monitoring method and device provided by the invention, a new economical, effective and simple-to-operate scheme is provided for multi-scale deformation monitoring of a complex port wharf structure. Based on the speckle monitoring and image processing technologies, the deformation state of a wharf foundation pile can be monitored for a long term in a non-contact manner. The defect that a wharf cannot work and production is affected due to the fact that loading is needed in the traditional test is overcome.

Description

technical field [0001] The invention relates to the field of building structures, in particular to a method and device for long-term monitoring of deformation. Background technique [0002] According to the current investigation and research results of my country's inland river wharves, it is found that hydraulic structures such as wharves will have different safety hazards when they are in use for more than ten years, and serious situations may cause loss of personnel and property. Most of the existing wharf structures adopt large-scale and long-span structures. At the same time, with the completion of the Three Gorges Reservoir area, the water level has further increased, and the water level drop can reach more than 30 meters. The underwater part of the wharf structure is more complicated. The built wharf is mostly used more than ten years. [0003] The safety performance detection of wharf structure, especially the long-term monitoring of foundation pile deformation is a...

AI Technical Summary

Problems solved by technology

When the acoustic measurement method is used for detection, it is necessary to excavate the well logging with strict requirements and pre-buried the measurement pipe in advance. The flexibility is low, the detection speed is slow, and it is difficult to calibrate errors in long-term monitoring.

When the dynamic measurement method is used for detection, the installation of instruments and equipment is complicated, the maintenance cost is high, and some steps require manual operation, which has certain potential safety hazards

[0005] The traditional testing technology is difficult to adapt to the wharf structure, mainly because: the water level of the wharf changes frequently, and the equipment cannot be erected; the structure is soaked by the water level for a long time, and the traditional testing equipment cannot meet the durability requirements of long-term monitoring; the traditional testing needs to be loaded, which makes the wharf unable to work, affecting production and high testing costs; it is difficult to unify the requirements for measuring point layout and measurement accuracy of different components of multi-material large-scale structures

[0006] Most of the traditional testing techniques need to contact the pile foundation to be tested, which increases the difficulty of testing and makes the monitoring process more complicated and unstable

However, some non-contact traditional testing techniques are used, which are expensive, complicated steps, and have large errors.

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