Combined multi-connected sample preparation instrument of remolded soil cutting ring sample and sample preparation method

Abstract

The invention relates to a combined multi-connected sample preparation instrument of a remolded soil cutting ring sample and a sample preparation method. The combined multi-connected sample preparation instrument comprises a sample pressing device and a pressurizing device, and the sample pressing device comprises a base, a cutting ring, an extension cylinder, a sample pressing piston and a combined body. A sampling groove, an exhaust hole and other parts are arranged on the base. During use, a permeable stone is placed at the upper part of the base, so that gas contained in a loose soil sample can be effectively discharged. The extension cylinder comprises an upper hoop cylinder and a lower positioning ring, the inner diameter of the hoop cylinder is the same as that of the cutting ring, the inner diameter of the positioning ring is matched with the outer diameter of the cutting ring, and the extension cylinder is matched with the cutting ring for use, so that disturbance to a sample can be effectively reduced; the combined body is formed by combining the base and the sample pressing piston, simultaneous preparation of a plurality of samples can be achieved, and the sample preparation efficiency is improved. According to the invention, the defects of non-uniform remolded soil sample preparation, difficulty in demolding and sampling, sample rebound, incapability of performing subsequent test operation and the like at present are overcome, and a plurality of standard homogeneous cutting ring samples suitable for various indoor soil tests can be accurately, simply and quickly prepared at the same time.

Description

technical field [0001] The invention belongs to the field of indoor geotechnical testing of geotechnical engineering, relates to the preparation of ordinary soil or remolded soil samples containing corrosive media, and specifically relates to a remolded soil sample that can realize the simultaneous preparation of multiple remolded soil ring samples. Combined multi-sampling instrument and sample preparation method for plastic soil ring knife sample. Background technique [0002] In engineering design or slope protection, it is very important to know the strength, stiffness and other parameters of soil accurately and quickly. With the R&D and production of multi-connected geotechnical equipment such as strain-controlled quadruple direct shear instrument and triple high-pressure consolidation tester, direct shear test and consolidation test have been further developed in terms of testing the strength and stiffness of soil. . However, the precision of the test and the accuracy...

AI Technical Summary

Problems solved by technology

Because for the contaminated soil immersion test, a complete and uniform sample can better reflect the immersion process of the aqueous solution; for the fiber soil strength test, the integrity and uniformity of the sample can better reflect the overall strength of the soil, but the existing The test equipment cannot quickly prepare remolded soil samples that can meet the test requirements

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