Spinning type coarse-grained soil triaxial experiment sample preparation device and sample preparation method

A triaxial experiment, coarse-grained soil technology, applied in sampling, instruments, scientific instruments, etc., can solve the difficulty in controlling the uniformity and compactness of the sample density, affect the mechanical properties of the sample, and coarse-grained soil structure Damage and other problems, to achieve the effect of uniform sample preparation, convenient operation, and meet the experimental requirements

Pending Publication Date: 2020-05-05
SHIHEZI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this kind of method is not easy to operate, and it is difficult to control the uniformity and compactness of the sample density. During the compaction process, it is easy to cause damage to the coarse-grained soil structure and affect the mechanical properties of the sample.

Method used

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  • Spinning type coarse-grained soil triaxial experiment sample preparation device and sample preparation method
  • Spinning type coarse-grained soil triaxial experiment sample preparation device and sample preparation method
  • Spinning type coarse-grained soil triaxial experiment sample preparation device and sample preparation method

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Embodiment 1

[0048] refer to figure 1 - Figure 14 , is a structural schematic diagram of an embodiment of the present invention, a spinning type coarse-grained soil triaxial experimental sample preparation device, mainly including a base 1, a reaction force frame, a rubber film 4, a sample preparation cylinder 5, a spinning device, and a water-permeable plate 3 , sample cap 18;

[0049] The base 1 includes upper, middle and lower layers of cylindrical bosses with different diameters, namely the upper boss 19, the middle boss 20, and the lower boss 21; the reaction force frame includes an annular bottom plate 2, a rigid reaction column 6. Reaction force cover plate 7, the lower end of the rigid reaction force column 6 is fixed on the annular bottom plate 2, the reaction force cover plate 7 is provided with a round hole 8, the upper end of the rigid reaction force column 6 is provided with threads, rigid The upper end of the reaction force column 6 passes through the circular hole 8 on th...

Embodiment 2

[0060] refer to figure 1 - Figure 14 , a sample preparation method utilizing the spinning type coarse-grained soil triaxial experimental sample preparation device described in Example 1, mainly comprising the following steps:

[0061] (1) Insert and fasten the rubber film 4 on the outer wall of the upper boss 19 of the base 1 to ensure that the bottom of the rubber mold 4 is pulled to the bottom of the upper boss 19 and adheres to the outer wall of the upper boss 19;

[0062] (2) Set the annular bottom plate 2 fixedly connected with four rigid reaction force columns 6 on the periphery of the upper boss 19 of the base 1, rotate and align with the screw holes of the lower boss 21 of the lower base, and insert the bolts;

[0063] (3) Install the sample preparation cylinder: put three arc-shaped steel templates 25 into the gap between the inner diameter side of the annular bottom plate 2 of the reaction frame and the outer side of the rubber film 4 in sequence, and fix the three...

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Abstract

The invention relates to the field of experimental equipment for testing soil mechanical properties in geotechnical engineering discipline, in particular to a spinning type coarse-grained soil triaxial experiment sample preparation device and sample preparation method. The spinning type coarse-grained soil triaxial experiment sample preparation device comprises a base, a counter-force frame, a rubber membrane, a sample preparation cylinder, a spinning device, a water permeable plate and a sample cap, wherein the base comprises an upper layer of cylindrical bosses, a middle layer of cylindricalbosses and a lower layer of cylindrical bosses with different diameters, and the counter-force frame comprises an annular bottom plate, a rigid counter-force column and a counter-force cover plate. The sample preparation method by utilizing the sample preparation device comprises the following steps: binding the rubber membrane on the base; arranging the annular bottom plate on the periphery of the upper layer of cylindrical bosses in a sleeving mode; installing the sample preparation cylinder; preparing the soil materials; filling the soil materials layer by layer and compacting; taking outa soil sample. According to the method, on the premise that the coarse-grained soil structure is not damaged, the coarse-grained soil sample used for the triaxial compression test can be prepared in ashort time, and the device is simple in structure, convenient to use, capable of accurately controlling layering and the total density of the coarse-grained soil, uniform in sample preparation, economical and practical.

Description

technical field [0001] The invention belongs to the field of experimental equipment for testing soil mechanical properties in the discipline of geotechnical engineering, and in particular relates to a spinning type coarse-grained soil triaxial experimental sample preparation device and a sample preparation method. Background technique [0002] Coarse-grained soil areas are widely distributed in my country, and the number of major projects built on coarse-grained soil foundations shows a trend of surge. The mechanical performance test of coarse-grained soil has become an important content in the field of civil engineering. When laboratories often measure the triaxial mechanical properties of soft soil, the diameter of the sample is usually equal to or greater than 5 times the maximum particle size. Generally, the diameter is 200-500mm, and the height of the sample is 2-2.5 times the diameter of the sample. Standard cylindrical specimens with a height of 200mm and a height of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/36G01N1/28
CPCG01N1/36G01N1/286G01N2001/366G01N2203/0298
Inventor 杨丰春刘洪光古一栋魏峥嵘李智杰蔡蕊吴亚中李冰雪贾飞飞
Owner SHIHEZI UNIVERSITY
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