Soft soil microstructure sample preparation device

A microstructure and soft soil technology, which is applied in the field of soft soil microstructure sample preparation, can solve the problems of difficult preparation of undisturbed soil microstructure samples, high moisture content, and many fine particles of soft soil, so as to save costs and improve efficiency and accuracy, and the effect of improving experimental efficiency

Pending Publication Date: 2017-01-11
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the microstructure sampling process of the prior art sample preparation device, there is a large error between the soft soil sample preparation and the actual sample cutting. Some soft soil has more fin

Method used

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  • Soft soil microstructure sample preparation device
  • Soft soil microstructure sample preparation device

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Embodiment Construction

[0022] See figure 1 with figure 2 As shown, the present invention is composed of a sampling device 1, a liquid nitrogen insulation tank 2 and a peristaltic pump 3. The sampling device 1 and the peristaltic pump 3 are respectively connected to the liquid nitrogen insulation tank 2 through a hose 4, and the hose 4 has Metal joint 41;

[0023] The sampling device 1 has a liquid nitrogen chamber 11 and a closed temperature sensing chamber 12 at the lower end, and a sleeve 13 and a free positioning and rotating device 14 at the upper end. The free positioning and rotating device 14 is provided on the sleeve 13, and the closed temperature sensing chamber 12 is provided in the sleeve. The lower end of the tube 13 and the lower part of the sleeve 13 are wrapped, and the liquid nitrogen chamber 11 is arranged outside the outer wall of the closed temperature sensing chamber 12;

[0024] The liquid nitrogen cavity 11 is coated with a sealing material in the cavity, and a metal interface 111...

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Abstract

The invention discloses a soft soil microstructure sample preparation device which comprises a sampling device, a liquid nitrogen heat insulation tank and a peristaltic pump, wherein the sampling device and the peristaltic pump are respectively communicated with the liquid nitrogen heat insulation tank through hoses. When in operation, the sampling device is inserted into soil by closing and opening a locking mechanism, a microstructure sampling bin device reaches a designated position, a valve of the peristaltic pump is opened, liquid nitrogen in the liquid nitrogen heat insulation tank is pressed into a liquid nitrogen cavity by pressure, thermo sensitive color-changing volatile liquid in a closed temperature sensing cavity changes along with soil temperature, color change of the outer wall of the cavity is displayed by observing outer wall temperature sensing materials of an upper cavity, a soil sample is taken out by the microstructure sampling bin device, and sampling is finished. Operation of manual sample cutting is avoided, sampling efficiency and accuracy are improved, cost is effectively saved, experimental efficiency is improved, the soil sample is not destroyed, and microstructures of different positions of the soil are observed by determining the position of the cut soil sample.

Description

Technical field [0001] The invention relates to the technical field of soil microstructure research, in particular to a soft soil microstructure sample preparation device. Background technique [0002] Soil is a structural body. The microstructure of the soil is closely related to its strength and other macro-mechanical properties. At the same time, the microstructure has a direct relationship with the engineering characteristics of the soil, which can be determined by the law of soil structure change. Understand the engineering properties of soil and analyze the macroscopic engineering problems from the perspective of microscopic study of soil deformation. The microstructure of soil is very complicated. Among the large amount of information data obtained, the directional information of soil microstructure is also very important. The various properties of soil fabric directly lead to the anisotropy of soil permeability. Therefore, How to ensure the reduction of the disturbance t...

Claims

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Application Information

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IPC IPC(8): G01N1/28
CPCG01N1/28
Inventor 牛岑岑王清张文王科宋盛渊占洁伟
Owner JILIN UNIV
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