A new triaxial soil sample volume change measurement device and measurement method

Abstract

The invention discloses a novel three-axis soil sample body change measuring device and measuring method. The measuring device comprises a fixed shaft, a pressure chamber, a three-axis soil sample and a vacuum tube, wherein the pressure chamber is provided with a pressure inner cavity; the three-axis soil sample is arranged in the pressure inner cavity of the pressure chamber; the top of the three-axis soil sample is provided with a soil sample cap; the upper part of the fixed shaft is connected onto the pressure chamber; the lower end of the fixed shaft is connected with the soil sample cap; the bottom of the three-axis soil sample is provided with pervious stone; a measuring needle pipe is arranged in the tube of the vacuum tube; measuring scales are arranged on the measuring needle pipe; a conducting pipe is arranged between the pressure chamber and the vacuum tube in a communicating way; a pipe opening formed in one end of the conducting pipe is communicated with the pervious stone arranged at the lower end of the three-axis soil sample; a pipe opening formed in the other end of the conducting pipe is communicated with the feeding end of the measuring needle pipe. The measuring device is provided with the measuring needle pipe with the scales; the measurement of the water and air in the solidification and shearing stage soil samples is realized, so that the body change of the three-axis soil sample can be accurately measured; in addition, the structure of the device is simple; the carrying is convenient; the processing cost is low; the popularization and the application in the production and teaching processes are easy.

Description

technical field [0001] The invention relates to the field of soil engineering tests, in particular to a novel triaxial soil sample body deformation measuring device and a measuring method. Background technique [0002] Triaxial tests can be divided into unconsolidated and undrained tests, consolidated undrained tests and consolidated drained tests according to the degree of consolidation before shearing and the drainage conditions during shearing. Among them, the consolidation and drainage test is a necessary test for the analysis and calculation of the parameters of the soil constitutive model. Accurately giving the volume change before and after the consolidation and shearing of the soil is the premise to ensure the accuracy of the parameters of the constitutive model. Therefore, in the test, it is necessary Accurately measure the volume of water and air in the triaxial soil sample to obtain the volume change of the triaxial soil sample, so as to calculate the constitutive...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the backwardness of the existing triaxial soil sample volume change testing device and method, and provide a novel triaxial soil sample volume change measurement device and measurement method, which can quickly and efficiently perform triaxial soil sample volume change measurement tests, improve the level of scientific research

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