Digital-image-based method for determining permeability coefficient of nonuniform geotechnical material

A digital image and geotechnical material technology, applied in image data processing, image enhancement, instruments, etc., can solve the problems of consuming a lot of manpower and material resources, and achieve the effect of overcoming manpower and material resources, high efficiency and low cost

Inactive Publication Date: 2015-01-07
HOHAI UNIV
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Problems solved by technology

In engineering practice, a large number of field tests are often required, and these field tests often require a lot of manpower and material resources

Method used

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  • Digital-image-based method for determining permeability coefficient of nonuniform geotechnical material
  • Digital-image-based method for determining permeability coefficient of nonuniform geotechnical material
  • Digital-image-based method for determining permeability coefficient of nonuniform geotechnical material

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Embodiment Construction

[0035] Below in conjunction with specific embodiment, further illustrate the present invention, should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various equivalent forms of the present invention All modifications fall within the scope defined by the appended claims of the present application.

[0036] Such as figure 1 As shown, the present invention discloses a method for determining the permeability coefficient of inhomogeneous rock and soil materials based on digital images, comprising the following steps:

[0037] S1: Obtain color digital image files of geotechnical materials.

[0038] With the popularity of digital cameras, the surface of geotechnical materials can be digitized and stored as digital image files. There are two main types: raster images and vector graphics. A raster ...

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Abstract

The invention discloses a digital-image-based method for determining the permeability coefficient of a nonuniform geotechnical material. Firstly, denoising and binarization processing are performed on an acquired colored digital image so that a binary image showing rock and other components can be obtained, then, the drawing boundaries in the image are extracted and converted into a vectorgraph file, finally, permeability analysis is performed based on finite element meshes in the vectorgraph file through a numerical value simulation test, and the permeability coefficient is determined. Compared with the prior art, the method overcomes the defects in a traditional laboratory test for evaluating the permeability coefficient, for instance, the test result is greatly influenced by samples, the test dimension of the laboratory test is different from that of a site test, and the defect that a large amount of manpower and a large number of material resources are consumed in a traditional on-site in-situ test is also overcome. The digital image technology is introduced to the method, the method has the advantages of being high in efficiency, low in cost and the like, and the permeability coefficient of a large-size nonuniform geotechnical material can be analyzed.

Description

technical field [0001] The invention relates to a new method for determining the permeability coefficient of inhomogeneous rock and soil materials, in particular to a method for determining the permeability coefficient of inhomogeneous rock and soil materials by using digital image technology. Background technique [0002] Permeability is an important content in the study of physical properties of geotechnical materials, and has been widely used in geotechnical engineering. There are mainly two methods for routinely determining the permeability coefficient of rock and soil materials: laboratory test and field test. In laboratory tests, for conventional media, the permeability coefficient is usually estimated based on flow velocity and water pressure; for low-permeability media, pulse tests are widely used to measure its gas permeability characteristics. In fact, the results of these laboratory tests are limited to the samples taken, and the scale of laboratory tests is diff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
Inventor 徐卫亚孟庆祥杨兰兰王环玲王如宾闫龙张强
Owner HOHAI UNIV
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