Sample preparation device for remoulded soil with different stress ratios

Abstract

The invention provides a sample preparation device for remoulded soil with different stress ratios. The device comprises a clamping unit, an upper fixing plate, a lower fixing plate, a confining pressure cover, an elastic membrane, a force transmission element, a first water-permeable element and a second water-permeable element, wherein the clamping unit comprises an upper clamping plate and a lower clamping plate; the upper clamping plate is provided with a hole; the upper fixing plate is provided with an upper hole matched with the hole; the lower fixing plate is provided with a lower hole having the same diameter as the upper hole; the two ends of the confining pressure cover are fixed on the upper fixing plate and the lower fixing plate respectively; the two ends of the elastic membrane are fixed at the peripheries of the upper hole and the lower hole in a defining manner respectively; and an outer wall of the force transmission element is clung to the elastic membrane. According to the sample preparation device for the remoulded soil with the different stress ratios, thin mud is poured into the sample preparation device, the force transmission element applies vertical pressure on the thin mud in the elastic membrane, and water in the confining pressure cover applies lateral pressure on the thin mud in the elastic membrane, so that the different stress ratios are controlled, a soil sample is solidified, and a remolded soil test sample with the uniform water content is obtained.

Description

technical field [0001] The invention relates to the field of engineering material testing instruments, in particular to a sample preparation device for remolded soil with different stress ratios. Background technique [0002] Due to the rapid development of engineering construction, the acquisition of geotechnical parameters, which are indispensable for engineering design, is particularly important. Soil test is an important means to obtain soil physical and mechanical parameters. Because the undisturbed soil is easily disturbed and highly discrete, the parameters obtained based on the undisturbed soil will have a large dispersion, which will affect the accuracy of soil parameters in engineering design. Therefore, relatively homogeneous remolded soil is more and more used in geotechnical tests. In order to simulate the soil environment under complex stress conditions, it is necessary to make remolded soil samples with different stress ratios in the laboratory for indoor use...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a sample preparation device for remolded soil with different stress ratios to solve the problem that remolded soil samples with different stress ratios cannot be prepared in the current indoor preparation technology

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