Temperature-controllable water-salt migration automatic test device suitable for multiple environments

Abstract

The invention provides a temperature-controllable water-salt migration automatic test device suitable for multiple environments. The device comprises a base, an organic glass tube, a water supply system, a water collection system, a temperature control system and a data acquisition system, the temperature control systems are arranged on the two end faces of the organic glass tube. The water supply system and the water collection system are connected with the temperature control system, and the data acquisition system is connected with the organic glass tube. According to the invention, the organic glass tube is used as a test cylinder, the volume is large, and the influence of coarse-grained soil size effect is neglected; the water supply system can be used for regularly and quantitatively supplying water, so that the manpower is saved; and the temperature control system is used for testing the salinized soil column under various conditions such as normal temperature, one-way freezing and two-way freezing, and the requirements of different working conditions are met. The device is suitable for large-volume test pieces under an open system, and is wide in application range, high in automation degree and accurate in test result.

Description

technical field [0001] The invention belongs to the field of automatic test devices; in particular, it relates to a water-salt migration automatic test device suitable for multi-environment controllable temperature. Background technique [0002] With the continuous improvement of road network grade and density in saline soil areas, the problem of engineering diseases of saline soil subgrades is also becoming more and more serious. Whether it is engineering or indoor test, under normal temperature or under freeze-thaw cycle, a test device that can verify the rationality of the partition layer setting is needed. However, the plexiglass tube used in traditional instruments has a small inner diameter (diameter 4.0cm), which is quite different from the migration channel in the actual roadbed. The size effect of coarse-grained soil cannot be ignored, and the soil samples contained in it must be air-dried, which is not easy to control the migration of the soil. Density, unable to ...

AI Technical Summary

Problems solved by technology

However, the plexiglass tube used in traditional instruments has a small inner diameter (diameter 4.0cm), which is quite different from the migration channel in the actual roadbed. The size effect of coarse-grained soil cannot be ignored, and the soil samples contained in it must be air-dried, which is not convenient for controlling the migration of the soil. Density, unable to achieve the required compaction degree, it is not convenient to simulate the actual compaction degree of each layer of road subgrade, temperature control is difficult to implement, there is no way to directly test the rise of capillary water under the action of freeze-thaw cycles, and it is impossible to simulate the saline soil at room temperature Water and salt migration height under various natural environmental conditions such as , one-way freezing and two-way freezing

Moreover, traditional instruments require more manual intervention, a large amount of operation in the monitoring process, large dispersion of test results, and poor test accuracy.

[0003] Therefore, the results obtained from traditional tests cannot meet the requirements of roadbed design of different grades, and have certain limitations on the reference value of engineering construction.

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