A sample preparation process of undisturbed triaxial sample of spin-down type soil

Abstract

The application relates to a sample preparation process of a spin-down type undisturbed soil triaxial sample, which belongs to the technical field of indoor geotechnical testing of the civil engineering discipline. The rotary cutting method is used for sample preparation. First, calculate the liquid index of the soil according to the soil data, and then select the corresponding cutting blade speed, and then place the soil sample on the nail plate, and control the lifting switch and cutting speed. switch to make the cutting blade complete lifting and rotating. When the cutting blade rotates, a circle with a larger diameter is formed at the cutting edge, and the original soil sample is cut through the self-rotation and lifting of the cutting blade to complete the production of the sample; The invention greatly simplifies the operation steps, does not disturb the undisturbed soil during the cutting process, avoids the influence of uncertain factors and human factors in the cutting process, and completes the sample preparation accurately and efficiently; compared with the existing laboratory The undisturbed soil cutter, its sample preparation efficiency is increased by 2 times, and the sample preparation time is about 15 minutes.

Description

technical field [0001] The application relates to a sample preparation process of a spin-down type undisturbed soil triaxial sample, which belongs to the technical field of indoor geotechnical testing of the civil engineering discipline. Background technique [0002] At present, with the continuous development of the construction industry, it is necessary to determine the mechanical properties of the undisturbed soil at the beginning of the project. Triaxial mechanical tests are usually used to provide information for the design of building structures. When the undisturbed soil is tested for triaxial mechanical tests, the cylindrical soil body with a diameter of 150 mm and a height of 200 mm should be made into a standard sample. The standard sample is usually a cylinder with a diameter of 39.1 mm and a height of 80 mm; To disturb the sample, appropriate sample preparation equipment, commonly called a soil cutter or sampler, must be used. [0003] At present, although the s...

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Problems solved by technology

[0005] The invention provides a spin-down type undisturbed soil triaxial sample preparation process to solve the problems of cumbersome operation steps in the existing sample preparation process, greatly affected by the operating proficiency of the sample preparation personnel, low sample preparation efficiency, and high efficiency during the sample preparation process. Problems such as large disturbance to soil samples and low success rate of sample preparation

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