Sample preparation apparatus of sandy clay triaxial test

A technology for triaxial test and sand soil, applied in the field of sample preparation device for sand triaxial test, can solve the problems of non-smoothness, easy inclination, uneven surface, etc., and achieve the effect of simple principle, simple operation and improved accuracy

Inactive Publication Date: 2010-03-03
SHANGHAI UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the shortcomings of sandy soil samples, such as uneven surface, rough surface, and easy tilting and extrusion during sample loading, the present invention provides a sandy soil triaxial test sample preparation device

Method used

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  • Sample preparation apparatus of sandy clay triaxial test
  • Sample preparation apparatus of sandy clay triaxial test
  • Sample preparation apparatus of sandy clay triaxial test

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Embodiment Construction

[0021] A preferred embodiment of the present invention is described as follows in conjunction with accompanying drawing: See figure 1 , figure 2 , image 3 and Figure 4 , The sand and soil triaxial test sample preparation device includes a pressure chamber base 14, a test upper cap 17 and a pressure chamber cylinder. The cylinder of the pressure chamber is composed of circular arc pieces 1, 2, 3 and a tight hoop 4. The embodiment of the present invention is suitable for making a triaxial sample with a diameter of 61.8 mm×a height of 120 mm. In this embodiment, samples with different diameters and heights can be made by changing the heights of the arcs 1, 2, 3 and the diameter of the sample preparation device to meet the needs of various tests.

[0022] The height of the above-mentioned circular arcs 1, 2, and 3 is 150mm±12mm, and each circular arc has a vertical exhaust groove 8 and three horizontal exhaust grooves 9, and the vertical exhaust grooves are located in the c...

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Abstract

The invention discloses a sample preparation apparatus of a sandy clay triaxial test, comprising a pressure chamber base, a test top cap and a pressure chamber cylinder, wherein the upper end and thelower end of the pressure chamber cylinder are matched with the pressure chamber base and the test top cap; the pressure chamber consists of three circular arc sheets, and moreover, a tightening ringis sheathed on the cylinder so as to cramp the cylinder; the inner wall of each circular arc sheet is provided with a vertical air discharge duct and a transverse air discharge duct; and the middle-lower wall of the cylinder has a suction hole communicated with the vertical air discharge duct and the transverse air discharge duct. The invention has the advantages that air between rubber membranesand the circular arc sheets can be completely discharged, thereby enabling the rubber membranes to cling to the circular arc sheets, and therefore, the surface creasing of a sample is prevented, so that the sample with a smooth and even surface can be prepared; and the sample has the advantages of simple principle and convenient operation. The invention can conveniently prepare samples with different diameters and heights through changing the diameter and the height of a sample tube, thereby satisfying the demands of various tests.

Description

technical field [0001] The invention relates to a sandy soil triaxial test sample preparation device in the field of civil engineering geotechnical tests. Background technique [0002] Sandy soil is not cohesive and plastic, but has strong water permeability. Sandy soils are good aquifers. When used as a building foundation, it is easy to compact and has a small settlement. However, under the action of water head and dynamic load, silt sand may have adverse engineering geological phenomena such as piping and liquefaction. The natural compactness of sandy soil is the main factor controlling its engineering properties. Therefore, in order to understand the mechanical properties of sandy soil, a large number of experimental studies have been carried out in the field of civil engineering geotechnical tests, and a large number of experimental results have been obtained. [0003] The commonly used test instruments for studying the mechanical properties of sandy soil in the exis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28
Inventor 孙德安申海娥段博陈振新陈波
Owner SHANGHAI UNIV
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