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Device for testing migration of vaporous water and soluble salt in compacted soil and testing method using device

A testing device and soluble salt technology are applied in the field of testing devices for gaseous water of compacted soil and migration of soluble salts, which can solve the problems of less research on migration characteristics of soluble salts in gaseous water and less testing equipment, etc. The effect of satisfying soil samples and test conditions, good protection methods, and convenient installation

Inactive Publication Date: 2019-11-15
CENT SOUTH UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, domestic and foreign studies on the migration of water in unsaturated soils mainly focus on liquid water and gaseous water under no load, while there are few studies on the migration characteristics of soluble salts and gaseous water under dynamic loads. , and less test equipment

Method used

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  • Device for testing migration of vaporous water and soluble salt in compacted soil and testing method using device
  • Device for testing migration of vaporous water and soluble salt in compacted soil and testing method using device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The present invention will be described in detail below in conjunction with accompanying drawing and specific embodiment, as figure 1 and 2 as shown,

[0026] The test device in the present embodiment comprises a hollow sample loading barrel 1, the height of the hollow sample loading barrel 1 is 30cm, and the staving diameter is 15cm; the vertical direction of the hollow sample loading barrel 1 is evenly provided with 6 rows of holes 2, each row The number of holes is 5 (starting from the barrel top, the vertical spacing of the holes is 5cm), the diameter of the hole 2 is 1cm; the outer wall of the hollow sample barrel 1 is covered with a layer of insulation layer 3, and the insulation layer 3 is There are also holes 2 corresponding to the positions of holes on the wall of the barrel, and insulation plugs 20 are provided. A row of holes 2 is used to insert and fix temperature and conductivity integrated sensor probes 6. In this embodiment, 5 temperature and conductivi...

Embodiment 2

[0033] 1) Remove the loading plate 15 first, fill the test soil sample into the sample loading bucket (1), and compact it in multiple layers according to the dry density. The height of the compacted soil layer is 28 cm, and place the loading plate 15 on the upper layer of the soil , after being connected with the loading rod 14; then the height of the circulating condensation pipe 17 is adjusted to about 1 cm on the upper part of the sample barrel 1 barrel, and the position of 1 cm above the loading plate 15, and then the upper part of the barrel is coated with a multi-layer safety film, sealed The upper part of the soil body; close the incubator 11.

[0034] 2) Add the solution required for the test in the Marlby bottle 8, so that the solution surface in the plexiglass water delivery pipe 7 has a distance of 2 cm;

[0035]3) according to the required test conditions, the temperature of the incubator 11, the temperature of the refrigeration system 16 and the vibration frequenc...

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Abstract

The invention discloses a device for testing migration of vaporous water and soluble salt in compacted soil and a testing method using the device. The device comprises a hollow sample containing barrel fixed in a constant temperature box through a clamp, the bottom of the hollow sample containing barrel is connected with a glass pipe through a flange, the bottom of the glass pipe is communicated with a mariotte bottle through a water delivery pipe, and the mariotte bottle is fixed in the constant temperature box through a clamp; a vibration motor is arranged at the upper part of the hollow sample containing barrel and connected with a loading board through a loading rod, and the loading plate can completely move out of the barrel; a refrigerant fluid circulating pipe is also arranged at the upper part of the hollow sample containing barrel and connected with a refrigeration system; holes are formed in the upper part of a box body of the constant-temperature box and can just allow the loading rod and the refrigerant fluid circulating pipe to pass through, and holes allowing data transmission lines to pass through are also formed in the box body of the constant-temperature box; multiple rows of holes are formed in the wall of the hollow sample containing barrelin the vertical direction, and sensor probes are inserted into any one row of holes.

Description

technical field [0001] The invention belongs to the field of soil testing equipment and technology, in particular to a testing equipment and testing method for gaseous water and soluble salt migration in compacted soil. Background technique [0002] The arid and semi-arid areas of Northwest China began to build a large number of transportation infrastructure such as high-speed railways, highways, and airport runways. In arid or semi-arid areas, precipitation is scarce, evaporation is large, groundwater is buried deep, and gaseous water migrates throughout the unsaturated soil. [0003] Public transportation such as high-speed rail, automobiles and planes run on the transportation infrastructure every day, which will generate dynamic loads. The roadbed of the transportation infrastructure is a porous medium material. Under the action of dynamic loads, the gaseous water in the soil will migrate upwards, and the soil The anions and cations in the body will migrate upward with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00G01M7/02
CPCG01N17/002G01M7/00
Inventor 马博盛岱超吕擎峰张升叶新宇李强马新岩
Owner CENT SOUTH UNIV
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