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Variable-density gas-containing soil sample preparation device and method based on zeolite replacement reaction

A displacement reaction and preparation device technology, which is applied to the indoor artificial simulation sample preparation of seabed gas-bearing sediments and the field of variable-density gas-bearing soil sample preparation devices, can solve the problem of air-bearing soil that cannot be prepared and is only suitable for the preparation of loose pine mushrooms. problems such as samples, to achieve the effect of high production efficiency, repeatable sample preparation, and convenient installation of the device

Pending Publication Date: 2020-06-26
INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent "Variable Pressure Controllable Gas Displacement Backpressure Device and Its Application in the Preparation of Air-Containing Soil Samples (ZL201310752757.1)" provides a method to replace zeolite with water to absorb methane gas and form air-bearing soil by virtue of the adsorption characteristics of zeolite , but this method is only suitable for the preparation of loose matsutake air-bearing soil samples, but cannot be prepared for the preparation of denser air-bearing soil samples

Method used

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  • Variable-density gas-containing soil sample preparation device and method based on zeolite replacement reaction
  • Variable-density gas-containing soil sample preparation device and method based on zeolite replacement reaction
  • Variable-density gas-containing soil sample preparation device and method based on zeolite replacement reaction

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Effect test

Embodiment 1

[0032] like Figure 1 ~ Figure 2 As shown, a variable density air-containing soil sample preparation device based on zeolite displacement reaction, including zeolite reactor 1, soil sample reactor 2 and soil sample forming box 3, the bottom of zeolite reactor 1 and the middle part of soil sample reactor 2 The high-pressure conduit A107 is connected, and the top of the zeolite reactor 1 is connected with an air inlet pipe B108 and a first vacuum pressure gauge 101 , and the air inlet pipe B108 is provided with a first valve 100 . The top of the soil sample reactor 2 is connected to the bottom of the soil sample forming box 3 through a high-pressure conduit B215, and the high-pressure conduit B215 is provided with a third valve 201 near the top of the soil sample reactor 2, and the high-pressure conduit B215 is located near the bottom of the soil sample forming box 3 There is an eighth valve 305 there. A stirrer 204 is correspondingly installed in the soil sample reactor 2, and...

Embodiment 2

[0047] In this embodiment, seabed clay (particle size less than 0.075mm, maximum specific gravity Gs is 2.73) is taken as the object, according to the patent "Variable pressure controllable gas displacement reaction device and its application in the preparation of gas-containing soil samples (Patent No. ZL201310752757.1 )” to prepare air-bearing soil with the zeolite replacement principle disclosed in 5%, and prepare different initial densities (such as the experimental requirements: the dry density is 1.60g / cm 3 , 1.65g / cm 3 and 1.70g / cm 3 ) air-bearing soft soil triaxial soil sample (experimental requirements: diameter d is 50mm, height h is 100mm, volume is 196.34cm 3 ), certainly the present invention can also be applicable to the air-containing soft soil triaxial soil sample preparation of other geotechnical experiment requirements; The test is carried out in a constant temperature room environment, and its concrete sample preparation is carried out according to the foll...

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Abstract

The invention discloses a variable-density gas-containing soil sample preparation device and method based on zeolite replacement reaction. The device comprises a zeolite reaction kettle, a soil samplereaction kettle and a soil sample forming box, the bottom of the zeolite reaction kettle is communicated with the middle of the soil sample reaction kettle through a high-pressure guide pipe A; the top of the zeolite reaction kettle is communicated with an air inlet pipe B and a first vacuum pressure gauge; the top of the soil sample reaction kettle is communicated with the bottom of the soil sample forming box through a high-pressure guide pipe B; a stirring device is correspondingly mounted in the soil sample reaction kettle; the top of the soil sample reaction kettle is communicated with agas inlet pipe A and a second vacuum pressure gauge, the bottom of the soil sample reaction kettle is communicated with a water inlet pipe, the bottom of the soil sample reaction kettle is communicated with the top of the soil sample forming box through a soil slurry communicating pipe, and a fourth valve, a first flowmeter and a seventh valve are sequentially arranged on the soil slurry communicating pipe from top to bottom; the bottom of the soil sample forming box is communicated with a third vacuum pressure gauge. According to the method, the gas-containing soil samples which are not limited by density conditions and meet the requirements of indoor soil engineering experiments can be controllably prepared in batches.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering geotechnical tests, in particular to a device and method for preparing variable-density gas-containing soil samples based on zeolite displacement reaction, and in particular to an indoor artificial simulation sample preparation technology for seabed gas-containing sediments. Background technique [0002] Air-bearing soil specifically refers to the soil in which gas exists in a closed free and dissolved state rather than in the form of gas hydrate. It is considered to be a metastable equilibrium body composed of soil particles, pore water, gas, temperature and overlying layer pressure. Once the balance is broken, its engineering properties will change rapidly, causing disasters to the project. For example, gas-bearing sediments on the seabed often cause disasters such as coastal landslides, soil liquefaction, and foundation subsidence, which are important safety hazards in marine e...

Claims

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Application Information

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IPC IPC(8): G01N1/36G01N1/38
CPCG01N1/36G01N1/38G01N2001/386G01N2203/0298
Inventor 王勇陈楷文孙富学孔令伟陈碧君李好强
Owner INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI