Controllable density geotechnical triaxial sample preparation device

Abstract

The invention relates to a controllable density geotechnical triaxial sample preparation device, which can effectively solve the problems of uneven top and bottom of the sample and incomplete appearance of the sample. The technical solution is that the pressure frame is composed of a lower disc, an upper disc and a vertical The frame structure is composed of pillars installed between the two discs, the upper disc is equipped with a vertical screw shaft, the end of the lower part of the screw shaft is equipped with a pressure plate, the jack is vertically fixed on the lower disc, and the piston rod of the jack is mounted on the There is a sample preparation mold, which is a hollow structure with an upper opening. The upper part of the sample preparation mold is equipped with a cylinder with an eaves. It is stuck on the upper mouth of the sample preparation mold, the cylinder extends into the cavity of the sample preparation mold, and the cavity between the lower end surface of the cylinder and the bottom surface of the sample preparation mold constitutes the compression space of the sample. The combination of iron cylinders with eaves at different heights can realize the uniform and layered sample preparation of triaxial samples, which is an effective method to solve the problem of controllable triaxial sample preparation.

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....

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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

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