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Soil temperature gradient moisture movement test device

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

Inactive Publication Date: 2016-08-10
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 temperature gradient moisture movement test device
  • Soil temperature gradient moisture movement test device
  • Soil temperature gradient moisture movement test device

Examples

Experimental program
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Embodiment 1

[0021] See Figure 1-8 , The native body temperature gradient moisture movement test device, including the sample chamber 13, the temperature gradient control device and the temperature and moisture content collection device. The sample chamber 13 is composed of an inner sleeve 6, an outer sleeve 7, an intermediate layer, an upper cover plate 18 and a lower cover plate 1. Five circular holes 23 are vertically and evenly distributed on the sides of the inner sleeve 6 and the outer sleeve 7, and the temperature and moisture sensor probes 11 are inserted into the circular holes 23. The inner sleeve 6 and the outer sleeve 7 are tightly connected with the upper cover plate 18 and the lower cover plate 1 by bolts 12 into a whole. The temperature gradient control device includes a lower high temperature water bath box 26, an upper low temperature water bath box 15, upper and lower heating chambers placed inside the sample chamber 13, upper and lower heat transfer plates 4 placed at bo...

Embodiment 2

[0022] The second embodiment: This embodiment is basically the same as the first embodiment, 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 organic glass material, forming a double-layer hollow sandwich structure. An insulation material 8 is placed between the inner sleeve 6 and the outer sleeve 7. The inner diameter of the inner sleeve 6 is 50mm±0.1mm, the outer diameter is 66mm±0.1mm, the height is 150mm±0.1mm, and the wall thickness is 8mm±0.2mm; the inner diameter of the outer sleeve 7 is 84mm±0.1mm and the outer diameter is 100mm± 0.1mm, the height is 150mm±0.1mm, and the wall thickness is 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 to fix the heat transfer plate 4. The radius of th...

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Abstract

The invention discloses a soil temperature gradient moisture movement test device. The device includes a sample chamber, a temperature gradient control device and a temperature and water content collection device. The sample chamber is composed of a plexiglass double-layer hollow interlayer sleeve and a cover plate. The upper and lower ends of the temperature gradient control device are high temperature control device and low temperature control device respectively, including a constant temperature water bath, a heating chamber placed inside the sample chamber, heat transfer plates placed at both ends of the sample, and a fully enclosed circulation pipeline. The soil moisture and temperature testing device is used to measure the moisture content and temperature of the soil simultaneously and in real time. This temperature gradient moisture movement test device is simple in design, light and handy, easy to operate, good in integration performance, and high in test accuracy.

Description

Technical field [0001] The invention relates to a geotechnical engineering measuring device, in particular to a temperature gradient moisture movement test device, belonging 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 the moisture content of unsaturated soil, and the change of the distribution 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 underground cable burying process, the soil near the cable heats up due to the long-term energization of the cable The temperature gradually increased. The change of temperature causes the suction an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/24
Inventor 孙文静于响梁学海孙德安
Owner SHANGHAI UNIV