Testing system capable of dynamically testing soil dehumidification/freezing water content change features

A dynamic testing and dehumidification technology, applied in soil material testing, measuring devices, analyzing materials, etc., can solve the problems of difficult dehumidification process, long time to reach equilibrium, etc., to expand use functions, improve measurement accuracy, and clear principles Effect

CN106370816AActive Publication Date: 2017-02-01NORTHWEST INST OF ECO-ENVIRONMENT & RESOURCES CAS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2017-02-01

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Abstract

A testing system capable of dynamically testing features of water content of soil in the dehumidification / freezing process comprises a pressurization dehumidification system, a temperature control system and an automatic data collecting system. According to the testing system, through the combination of the pressurization dehumidification system and the temperature control system, the constant-temperature dehumidification drying process and the constant-pressure cooling freezing process of a soil sample are achieved. By means of the testing system, the whole dehumidification process is conducted in a temperature-adjustable constant-temperature control box, testing of soil water content features is completed, error influences caused by potential factors such as temperature change, water evaporation, soil volume change and manual operation in the dehumidification process of soil are fundamentally reduced, and on the other hand, the cooling freezing process of soil under different pressure conditions is achieved through a pressurization device and effective methods and means are provided for soil freezing experimental investigation under the high pressure condition. The system can be used for the dewatering drying process of the soil sample under the set temperature condition and can also be used for the cooling freezing process of the soil sample under the set pressure condition, and the automatic real-time monitoring and collecting in the soil sample dynamic changing process are achieved.
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Description

technical field

[0001] The invention relates to an experiment testing system, in particular to an experiment system capable of dynamically testing soil dehumidification / freezing water change characteristics. Background technique

[0002] Soil moisture characteristics are used in farmland soil moisture balance in agricultural production, water resource development and utilization and ecological environment protection issues related to vadose zone, prediction of migration of pollutants in vadose zone and consolidation and settlement of unsaturated soil in engineering practice, etc. important role and significance in research. Liu Suxia and others pointed out in the article "Analysis of the Relationship between Root Layer and Surface Soil Moisture in China" published in "Journal of Plant Ecology" Vol. Because of its special status, it has received increasing attention from various related disciplines. Climate change, Earth's surface processes, weather forecasting, flood hazard...

Examples

Embodiment

[0041] During the implementation process, for the dehumidification test, the permeable stone 8 with a drain nozzle is firstly saturated and placed on the interval base 5 in the pressure-bearing soil sample box 1 together with the impermeable membrane 10, while for the freezing test, no The water-permeable stone 8 with the water spout is needed, and only the water-tight membrane (10) is needed.

[0042] Take the soil with the soil sample confinement ring 9, and place the temperature moisture sensor 14 and the matrix suction sensor 15 in the soil sample at the designated position at the same time, then place the soil sample confinement ring 9 together with the soil sample and the temperature moisture sensor 14 and the matrix suction force in the soil sample The sensor 15 is placed on the saturated permeable stone 6, and the position is adjusted so that the bottom of the entire soil sample is in close contact with the permeable stone 8 with a drain nozzle. After the pressure is b...