Automatic dry-wet freeze-thaw cycling test device and test method

Abstract

The invention discloses an automatic dry-wet freeze-thaw cycling test device which comprises an operation platform, a control module, an evaporation module, a spray module, a weighing module, a refrigeration module and a manipulator operation module, wherein the spray module controls a peristaltic pump through a pulse control sent by the control module to complete the control on the water additionamount; the weighing module detects the quality through a pressure sensor and completes the quality control and data collection; the refrigeration module adopts a refrigeration box; and the manipulator operation module controls a stepping motor to realize the walk in any position in a two-dimensional space through the control module. The invention also discloses an automatic dry-wet freeze-thaw cycling test method. According to the test method, a signal is sent to the control module according to an input parameter instruction, and the whole process of a wet-dry freeze-thaw cycling test is completed through cooperation of each module. The test device and the test method provided by the invention are professionally used for the dry-wet freeze-thaw cycling test of loess, thereby realizing the fully-automatic control of the test, improving the test precision, reducing the personnel investment and lowering the production cost.

Description

technical field [0001] The invention relates to an automatic dry-wet freeze-thaw cycle test device and test method, which can automatically detect the dry-wet state and freeze-thaw state of samples in the test process, belongs to the field of dynamic balance testing of geological engineering rock and soil properties, and realizes dry Fully automatic control of wet freeze-thaw cycle test and improve test accuracy. Background technique [0002] Under the influence of the atmospheric environment, the loess highway slope has experienced long-term dry-wet cycles and freeze-thaw cycles, which will inevitably cause changes in the physical and mechanical properties and structure of loess, thereby affecting its strength and permeability characteristics. Therefore, the dry-wet cycle and freeze-thaw cycle tests are of great significance for studying the properties of loess. [0003] To study the attenuation law of soil strength parameters with the number of dry-wet and freeze-thaw cyc...

AI Technical Summary

Problems solved by technology

Due to the lack of special instruments in the traditional dry-wet test process, it is difficult to accurately and uniformly add water to multiple samples in the process of artificially adding water; The conversion from the evaporation process requires the test personnel to weigh at any time to judge the dry and wet state of the sample

The results obtained by traditional dry-wet cycle test instruments have large dispersion, low precision, large test errors, time-consuming and laborious, and increase test costs.

The freeze-thaw cycle test is to realize the freeze-thaw process by setting the freezing temperature and melting temperature. Generally, only the setting out process can be realized, and the sampling process after the end of the test cannot be realized.

Due to the large number of samples in the freeze-thaw cycle test, generally put all the test samples in and take them out after the set cycle is over. Different times of tests need to be taken out in batches manually. If you miss the current cycle Take out the time, then enter the next cycle test, which is time-consuming and labor-intensive and affects the progress of the test

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