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Soil body temperature gradient and moisture movement test device

A soil temperature and test device technology, which is applied in the fields of geotechnical engineering measurement devices and temperature gradient moisture movement test devices, can solve problems such as affecting the measurement results of water content, affecting the water conduction in the sample box, and soil sample disturbance.

Inactive Publication Date: 2014-12-24
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of determining the water content at a certain temperature is currently the method of drilling samples and then drying and weighing. This method cannot obtain the water content of the soil under real-time conditions.
The other method is the slice soil drying method. This method also disturbs the soil sample to a certain extent. After slicing, the soil sample adheres to the inner wall of the sample box and the sealing of the sample box will affect the moisture content in the sample box. conduction, affecting the water content measurement results

Method used

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  • Soil body temperature gradient and moisture movement test device
  • Soil body temperature gradient and moisture movement test device
  • Soil body temperature gradient and moisture movement test device

Examples

Experimental program
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Effect test

Embodiment 1

[0021] see Figure 1-8 , the local body temperature gradient moisture movement test device includes a sample chamber 13, a temperature gradient control device and a temperature and water content acquisition device. The sample chamber 13 is composed of an inner sleeve 6 , an outer sleeve 7 , an interlayer, an upper cover 18 and a lower cover 1 . Five vertical and evenly distributed round holes 23 are opened on the sides of the inner sleeve 6 and the outer sleeve 7 , and the temperature and moisture sensor probes 11 are inserted in the round holes 23 . The inner sleeve 6, the outer sleeve 7, the upper cover plate 18 and the lower cover plate 1 are tightly connected into one body by bolts 12 . The temperature gradient control device includes a lower high-temperature water bath 26, an upper low-temperature water bath 15, upper and lower heating chambers 2 placed inside the sample chamber 13, upper and lower heat transfer plates 4 placed at both ends of the sample 10, and a fully ...

Embodiment 2

[0022] Embodiment 2: This embodiment is basically the same as Embodiment 1, and the special features are as follows:

[0023] see Figure 1-4 And 9, the inner sleeve 6 and the outer sleeve 7 of the sample chamber 13 in the temperature gradient moisture movement test device of the present invention are made of plexiglass material, forming a double-layer hollow interlayer structure. A thermal insulation material 8 is placed between the inner sleeve 6 and the outer sleeve 7 . The inner sleeve 6 has an inner diameter of 50mm±0.1mm, an outer diameter of 66mm±0.1mm, a height of 150mm±0.1mm, and a wall thickness of 8mm±0.2mm; the outer sleeve 7 has an inner diameter of 84mm±0.1mm and an outer diameter of 100mm± 0.1mm, height 150mm±0.1mm, wall thickness 8mm±0.2mm. There is an annular groove 17 on the inner wall of the inner sleeve 6 at a distance of 15 mm ± 0.1 mm from the upper and lower bottom surfaces, for fixing the heat transfer plate 4 . The radius of the groove is 1mm±0.1mm....

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Abstract

The invention discloses a soil body temperature gradient and moisture movement test device. The device comprises a sample chamber, a temperature gradient control device and a temperature and moisture content acquisition device. The sample chamber is composed of an organic glass double-layer hollow interlayer sleeve and a cover plate. The upper end and the lower end of the temperature gradient control device are respectively provided with a high temperature control device and a low temperature control device, and the temperature gradient control device comprises a constant temperature water bath box, a heating chamber placed inside the sample chamber, heat transfer plates arranged on both ends of a sample and a full-closed circulating pipeline. By using the soil body moisture and temperature test device, the moisture content and the temperature of a soil body are synchronously real-timely measured. The temperature gradient and moisture movement test device is simple, light and handy in design, convenient to operate, good in integration performance and high in test precision.

Description

technical field [0001] The invention relates to a geotechnical engineering measuring device, in particular to a temperature gradient moisture movement test device, which belongs to the technical field of geotechnical engineering measuring instrument manufacturing. Background technique [0002] The influence of temperature on the hydraulic and mechanical properties of unsaturated soil cannot be ignored. The change of temperature causes the change of moisture content of unsaturated soil, as well as the distribution change of stress field and displacement field. In the deep geological disposal project of high-level radioactive nuclear waste, unsaturated bentonite used as a buffer / backfill material is subjected to temperature loads from the continuous decay of nuclear waste; during the burying of underground cables, the soil near the cables is heated due to the long-term energization of the cables The temperature gradually increased. Changes in temperature cause changes in the...

Claims

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Application Information

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IPC IPC(8): G01N33/24
Inventor 孙文静于响梁学海孙德安
Owner SHANGHAI UNIV
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