Density-controllable geotechnical triaxial sample preparation device

Abstract

The invention relates to a density-controllable geotechnical triaxial sample preparation device which can effectively solve the problems of unevenness in the upper and lower parts of a sample and incompleteness in the appearance of sample. According to the technical scheme, a pressure frame is of a frame structure which is composed of a lower disc, an upper disc and a pillar vertically mounted between the two discs; a vertical screw shaft is mounted on the upper disc, and a platen is mounted on the end part of the lower part of the screw shaft; a jack is vertically fixed on the lower disc, and a sample preparation mould is mounted on a piston rod of the jack; the sample preparation mould is of a hollow structure with an opened upper part, and cylinders with eaves are mounted at the upper opening part of the sample preparation mould, each cylinder with eave is of an integral structure composed of a top eave and a cylinder body mounted at the lower part of the top eave; the top eave is clamped at the upper opening part of the sample preparation mould, the cylinder body extends in a cavity of the sample preparation mould, and a cavity between the lower end face of the cylinder body and the bottom face of the sample preparation mould forms a sample pressing space. A guide barrel is matched with the iron cylinders with eaves with different heights, so that homogeneous stratified sample preparation of triaxial samples is realized, and controllable triaxial sample preparation is effective.

Description

technical field [0001] The invention relates to the field of civil engineering geotechnical tests, in particular to a density-controllable geotechnical triaxial test sample preparation device for sandy soil and fine-grained soil. Background technique [0002] Soil materials are important construction materials for earth dams, embankments, roadbeds and other engineering aspects. During engineering construction, soil materials need to be compacted or rolled to achieve the design density. The shear strength of the soil after rolling is an important factor affecting the stability of the project. Therefore, according to the engineering design requirements, it is an indispensable and important link to determine the strength of the reshaped soil through the triaxial shear strength test indoors. According to the national geotechnical experiment regulations, the density of soil samples needs to be strictly controlled in order to accurately reflect the actual situation of the project....

AI Technical Summary

Problems solved by technology

[0004] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a kind of sandy soil and fine-grained soil controllable density type geotechnical triaxial test sample preparation device, which can effectively solve the problem that the same batch of sample individuals cannot meet the requirements. Uniformity requirements, uneven top and bottom of the sample, and incomplete appearance of the sample

Images