Frozen soil embankment model making and thermal thaw landslide test device and test method of frozen soil embankment model

A manufacturing method and embankment technology, applied in the field of model testing, can solve the problem of inability to prepare saturated transparent frozen soil samples, etc.

Inactive Publication Date: 2016-11-30
HUNAN CITY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the saturated transparent frozen soil sample cannot be prepared by using the existing solid particles for preparing transparent soil.

Method used

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  • Frozen soil embankment model making and thermal thaw landslide test device and test method of frozen soil embankment model

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A kind of permafrost embankment model making method, it comprises the following steps:

[0046] ⑴Material preparation: First, make a mold to simulate the embankment model according to the test requirements, and then calculate and determine the amount of fluoropolymer, granular ice and colorless pore liquid according to the test conditions and mold size; the fluoropolymer has a particle size of 0.25mm ~2.0㎜ particles, cleaning impurities and drying, the particles are irregular in shape, TeflonAF 1600 produced by DuPont, USA, with a refractive index of 1.31 and a density of 2.1g / ㎝ 3 ~2.3g / ㎝ 3 ; The granular ice is crushed from a frozen whole piece of ice, and its particle size is 0.1 mm to 0.5 mm; the colorless pore liquid is water;

[0047] In step (1) of the present invention, the fluorine-containing polymer particles of 0.25㎜≤particle diameter<0.5㎜ are 10%~50%; those of 0.5㎜≤particle diameter<1.0㎜ are 10%~50%, and 1.0㎜≤ 10% to 50% for particle size <1.5㎜, 10% to 50% ...

Embodiment 2

[0095] In order to check the effect of the treatment measures on eliminating thermal melt slump, in the process (2) of the present invention, heat insulating material 11 is laid on the sunny slope 7, and a retaining wall 10 is set at the foot of the sunny slope 7; the heat insulating material 11 is made of A gravel layer simulated by fluoropolymer particles with a thickness of 5 mm to 15 mm or a polyethylene foam plastic net (in this example, a gravel layer simulated by fluoropolymer particles with a thickness of 10 mm), the retaining wall 10 It is made of plexiglass; in the process (3), according to the experimental design, the heat source 6 is intermittently turned on, and the digital camera 3 observes and records the thermal and thawing of the sunny slope surface 7 under the freezing and thawing cycle of the transparent frozen soil embankment model 13 slump process, and the recorded data is sent to the processing device 4 through the data line, and the effect of the treatmen...

Embodiment 3

[0098] In the preparation of permafrost embankment model 13, the selected density is 2.1g / ㎝ 3 fluorine-containing polymer particles, 20% for fluorine-containing polymer particles 0.25㎜≤particle size3 , severe 18kN / m 3 , compactness 30%; mechanical properties: internal friction angle 30°, elastic modulus 10MPa, Poisson's ratio 0.35.

[0099] Remaining with embodiment 1,2.

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Abstract

The invention discloses a visual frozen soil embankment model making and frozen soil embankment model thermal thaw landslide test device and test method. The transparent frozen soil embankment model is made by using fluorine-containing polymer as a transparent solid material in the transparent frozen soil. The fluorine-containing polymer is a particle with a particle size of 0.25㎜~2.0㎜, which is Teflon AF 1600 produced by DuPont Company of the United States, with a refractive index of 1.31 and a density of 2.1g / ㎝ 3 ~2.3g / ㎝ 3 The test device includes a low-temperature laboratory, and the low-temperature laboratory is provided with simulation devices including transparent model tanks, transparent permafrost embankment models and other simulated embankments and natural environments, including laser sources, recording observation devices and processing devices for digital cameras; The transparent soil prepared by the invention has high transparency and good similarity with natural permafrost soil properties; the test device is easy to realize and has strong repeatability; it can be used to simulate complex geological conditions and is effectively used in model tests in geotechnical engineering .

Description

technical field [0001] The present invention relates to a kind of model test in geotechnical engineering, specifically a kind of permafrost embankment model making and permafrost embankment model heat-thawing landslide test device and test method, especially relate to a kind of visual permafrost embankment model making and testing method Thermal thawing landslide test device and test method for frozen soil embankment model. Background technique [0002] In the model test of geotechnical engineering, it is of great significance to explore the nature of geotechnical engineering problems by studying the law and mechanism of soil internal deformation. In particular, the area of ​​permafrost, seasonally frozen soil and short-term frozen soil areas on the earth accounts for about 50% of the land area, of which the distribution area of ​​permafrost is 35 million ㎞ 2 , accounting for about 25% of the land area. Frozen soil is a kind of soil that is extremely sensitive to temperatu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28G01N25/00
Inventor 孔纲强
Owner HUNAN CITY UNIV
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