A method for improving the detection accuracy of salt swelling test of saline soil

Abstract

The invention discloses a method for improving detection accuracy of a saline soil salt expansion experiment. The method is characterized in that a container for containing saline soil in the salt expansion experiment is designed to be of an axial sectional structure, and each section is enabled to freely slide axially, so that when the saline soil is subjected to the salt expansion experiment, constraint of the inner wall of the container on vertical expansion amount is reduced to improve experiment detection accuracy. The method has the advantages of simplicity in implementation, high experiment accuracy, flexible and adjustable experiment parameters and various experiment modes.

Description

technical field [0001] The invention relates to the field of research on the harm of salt expansion of saline soil, in particular to a method for improving the detection accuracy of a salt expansion test of saline soil. Background technique [0002] saline soil is saline with alkaline earth and various salinization, alkaline soil the general term for. Saline soil refers to the soluble salt content in the soil that is significantly harmful to crop growth. Soil . Salt content indicators vary with different salt compositions. Alkaline soil refers to the soil containing a large amount of exchangeable sodium that harms plant growth and changes soil properties. Saline soil is mainly distributed in inland arid, Half arid area , There are also distributions in coastal areas. The area of ​​saline soil in the world is about 8.97 million square kilometers, accounting for about 6.5% of the world's total land area and 39% of the total area of ​​arid regions. The area of ​​...

AI Technical Summary

Problems solved by technology

At present, the existing salt expansion tester still has the following shortcomings: ①It can only do the salt expansion test under the action of temperature (freeze-thaw cycle, temperature gradient) and load, and cannot realize the dry-wet cycle with continuous change of water content under constant temperature The salt expansion test cannot realize the salt expansion test coupled with the freeze-thaw cycle and the dry-wet cycle under load; ②The function is simple and the degree of integration is low; ③The sample bucket with an overall structure is used, and the sample size and height of the salt expansion test are relatively large , during the test, the sample bucket significantly constrains the vertical salt expansion of the sample, resulting in significantly smaller test results; ④ The height of the test bucket is fixed, resulting in limited adjustment of the sample height and size

Images