Method for testing water ratio of red clay samples based on computed tomography scan

Abstract

The invention provides a method for testing the water ratio of red clay samples based on CT (computed tomography) scan. The method comprises the following steps: selecting a plurality of cylindrical test pieces with required diameters, different dry densities and different water ratios, performing the CT scan on the cylindrical test pieces approximately in three layers according to quartering, collecting the average computed tomography value of each fault surface, and using the average value of the three fault surfaces of the same test piece as the final computed tomography data of the test piece; retesting the water ratio of the test piece on which the CT scan is performed, and fitting the computed tomography value of each test piece, the water ratio of the tested test piece and the fitted dry density of the test piece to obtain the relational expression of the computed tomography value, the water ratio and the dry density of the red clay sample. Through the adoption of the method disclosed by the invention, the water ratio of the fault surfaces can be observed and surveyed under the circumstance that the test pieces are not damaged, continuously observing and surveying the changes of the water ratio of the test pieces under the premise that the test pieces are not damaged can be ensured, and the method has important significance in harmlessly and continuously researching the migration regularity of vapor of soil masses.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a method for testing the water content of a red clay sample based on CT scanning. Background technique [0002] In southern my country, the climate environment is hot and humid, the geological and hydrological conditions are complex, and red clay is widely distributed. Because red clay has the characteristics of fine particles and strong water holding capacity, and the current construction control moisture content with the maximum dry density as the goal is far lower than the equilibrium moisture content, therefore, under the influence of the local climate environment, the internal humidity state of the red clay subgrade will vary with time. The stability of time and space is poor, and the moisture content of the subgrade after completion will increase to a certain equilibrium state suitable for climate, hydrology and other conditions, resulting in a decreas...

AI Technical Summary

Problems solved by technology

However, it is expensive, and multiple probes must be buried at the measuring point during the measurement

[0004] It can be seen that among the above-mentioned moisture content determination methods, the drying method and the TDR method cannot carry out the non-destructive test of the sample moisture content, although the resistance method, neutron method, and gamma ray (transmission) method can non-destructively and continuously test the sample moisture content. , but there are deficiencies such as low test accuracy, low safety or expensive equipment

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