Nondestructive measurement device based on frozen soil water migration rule, and measurement method thereof

Abstract

The invention discloses a measurement device based on a frozen soil unfrozen water migration rule. The measurement device comprises a container with openings in two ends, a controller, a plurality ofelectrode patches, a plurality of electrode connecting lines, low-temperature circulators, an upper computer, an external measurement device and a water injection module; the low-temperature circulators are mounted at the two ends of the container with the openings in the two ends, and perform temperature control on a frozen soil sample placed in the container; the controller controls the electrode patches to work and acquires an electric signal for measurement; the electrode patches acquire an input power supply signal or output the electric signal for measurement; the water injection moduleis connected with water injection holes of the low-temperature circulators and is used for injecting water into the container; the external measurement device is used for supplying power to the controller, providing the input power supply signal and acquiring the electric signal for measurement through the controller; and the upper computer controls the electrode patches and controls the low-temperature circulators to work. The invention further discloses a measurement method of the measurement device based on the frozen soil unfrozen water migration rule. The measurement device realizes the measurement of unfrozen water in frozen soil, and is simple and reliable and is convenient to use.

Description

technical field [0001] The invention specifically relates to a non-destructive measuring device and a measuring method for the water migration law of frozen soil. Background technique [0002] Frozen soil is defined as a rock mass containing ice crystals below 0°C. According to the freezing time, it can be divided into: permafrost (also known as permafrost, which refers to the soil layer that does not thaw for two years or more), seasonal frozen soil (half to several months) and short-term frozen soil (hours / days or even half a month). my country's permafrost accounts for more than 1 / 5 of the country's land area. It is the third largest permafrost country in the world after Russia and Canada. It is mainly distributed in high latitude and high altitude areas such as Northeast China, Inner Mongolia, Xinjiang and Tibet, and often forms high cold and high heat. Due to the influence of climate, most of the frozen soil in our country belongs to seasonal frozen soil. [0003] How...

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Problems solved by technology

[0005] 1. The layered drying method can only understand the total amount of water migration in the whole process of the soil, but cannot reflect the law of water migration in the process, and it takes a long time and a large workload;

[0006] 2. TDR is a similar method. Although the operation of this method is relatively simple and the time is relatively short, this method needs to insert the probe into the soil, which will destroy the integrity of the soil, and the TDR method is used to explore the accuracy of water migration. Low, there are many factors affecting the experiment, and it is unstable

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