Three-dimensional visualization test device and method for seabed deformation induced by hydrate decomposition
A technology of hydrate decomposition and test method, which is applied in the direction of measuring device, optical device, soil material testing, etc., can solve the problem that it is impossible to directly observe the three-dimensional displacement change of the internal crack propagation of the soil in the fluid migration path inside the soil, etc. Achieve the effects of easy popularization, mild conditions and simple preparation method
Active Publication Date: 2021-10-15
OCEAN UNIV OF CHINA
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[0005] The present invention proposes a three-dimensional visualization test device and method for hydrate decomposition-induced seabed deformation, which solves the problem of inability to visually observe the three-dimensional displacement changes of the fluid migration path inside the soil and the crack propagation inside the soil in the prior art, The natural gas hydrate substitute of the present invention can carry out the physical model test under normal pressure, which simplifies the test conditions
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[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0029] See attached figure 1 , attached figure 2 , attached image 3 , attached Figure 4 , attached Figure 5 And attached Figure 6 , a three-dimensional visualization test device for hydrate decomposition-induced seabed deformation of the present invention, comprising a transparent model box 116, the transparent model box 116 is provided with a sediment layer 101, one side of the transparent model box 116 is provided with a laser, and the transparent model ...
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Abstract
The invention provides a three-dimensional visualization test device and method for seabed deformation induced by hydrate decomposition. The present invention comprises a transparent model box, a deposition layer is arranged in the transparent model box, a laser and a CCD camera are arranged on the side of the transparent model box, a laser displacement meter is arranged on the top of the transparent model box, and a temperature sensor and a pressure sensor are arranged inside the deposition layer. Sensor; sedimentary layer includes transparent marine soft clay layer and natural gas hydrate layer; transparent marine soft clay layer is prepared by mixing and stirring lithium magnesium silicate and distilled water according to the mass ratio of 3.5 to 6.5:100, and the natural gas hydrate layer It is prepared from trichlorofluoromethane and distilled water at a volume ratio of 1:2 to 1:4 under normal pressure. The invention can simulate the seabed response under the condition of natural gas hydrate decomposition under normal pressure, the fluid migration path inside the seabed sediment and the crack expansion inside the soil are visible to the naked eye, and the three-dimensional displacement field can be obtained through image processing.
Description
technical field [0001] The invention relates to the technical field of marine geology, in particular to a three-dimensional visualization test device and method for seabed deformation induced by hydrate decomposition. Background technique [0002] Gas hydrates mostly exist in sediment pores under low-temperature and high-pressure environments on the seabed. When the seabed temperature rises or pressure decreases, gas hydrates decompose into gas and water, resulting in an increase in pore pressure. As pore pressure builds up, seabed deformation occurs, such as seabed heaving. At the same time, the decomposition of natural gas hydrate leads to a gradual decrease in the cementation strength and effective stress of the sediments. Under the triggering action of external forces such as earthquakes, submarine landslides are extremely prone to occur. [0003] At present, the research on the seabed deformation induced by the decomposition of natural gas hydrate is mainly based on ma...
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IPC IPC(8): G01N33/24G01N21/84G01B11/16
CPCG01B11/16G01N21/84G01N33/24G01N2021/8411
Inventor 朱超祁贾永刚焦欣然李三忠单红仙李清平程升刘柯涵
Owner OCEAN UNIV OF CHINA