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Three-axis test device and methods for sediments including gas hydrates

A hydrate sediment, triaxial test technology, applied in the field of natural gas hydrate sediment test, to achieve the effect of low cost, uniform distribution and simple structure

Inactive Publication Date: 2011-11-23
INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0006] The present invention will provide a triaxial test device and test method for sediments containing natural gas hydrate, aiming to solve the problem of sample preparation and triaxial shear strength testing of sediments containing natural gas hydrate formed by gas diffusion and migration on the seabed

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  • Three-axis test device and methods for sediments including gas hydrates
  • Three-axis test device and methods for sediments including gas hydrates

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Embodiment Construction

[0069] Below in conjunction with accompanying drawing and embodiment describe in detail:

[0070] 1. Device

[0071] 1. Overall

[0072] Such as figure 1 , the structure of this device is:

[0073] The testing machine 11 is placed on the lower part of the triaxial force-bearing frame 12 and connected by bolts, the high-pressure confining pressure chamber 13 is placed on the testing machine 11, and the main shaft 11-1 of the testing machine 11 is connected with the bottom surface of the high-pressure confining pressure chamber 13, so that it upward movement;

[0074] The lower end of the push rod 17 passes through the piston 16 and contacts the pressure cap 15, the upper end of the push rod 17 contacts the bottom end of the force measuring ring 86, and the upper part of the force measuring ring 86 is fixed on the top of the stressed frame 12. The force measuring ring 86 is used for measuring Such axial pressure;

[0075] The displacement sensor 87 is fixed on the top of th...

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Abstract

The invention discloses a three-axis test device and methods for sediments including gas hydrates, relating to a testing technology of sediments including gas hydrates. The device is used for making samples with different hydrate contents and uniform distribution by utilizing first circulation and saturation and then cooling of gas-containing saturated water in the samples and then carrying out three-axis shear on the sample in a certain confining pressure so as to determine the mechanical parameters of the samples. Based on the device, a set of methods for testing the three-axis mechanical parameters of the sediments including gas hydrates is formed, and the mechanical parameters measured by the method are closer to the natural state. The device and methods disclosed by the invention are used for carrying out an accurate simulation test on the marine gas hydrate forming process in a laboratory, providing technical assurance and support for the further study of physical and mechanical properties of the marine soil including gas hydrates, and promoting the further development of the research powerfully.

Description

technical field [0001] The invention relates to a testing technology for deposits containing gas hydrate, in particular to a test device and a test method capable of simulating the formation conditions of deposits containing gas hydrate under natural conditions for laboratory sample preparation and triaxial mechanical strength index testing. [0002] Specifically, it involves the laboratory sample preparation of gas hydrate-containing sediments and the test of triaxial shear strength. According to the circulation of dissolved gas water in the sample that meets the temperature and pressure conditions for hydrate formation, the hydrates are uniformly distributed. The samples of gas hydrate-containing sediments were controlled by different cycle times to test the shear strength of gas hydrate-containing sediments at different hydrate saturations, and to study the mechanical properties of hydrate-containing sediments. Background technique [0003] Gas hydrate is methane CH ...

Claims

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Application Information

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IPC IPC(8): G01N3/24G01N1/28
Inventor 魏厚振颜荣涛韦昌富陈盼田慧会
Owner INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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