Liquid and plastic limit combined determinator sample cup and sample preparation method of sample cup

Abstract

The invention relates to a liquid and plastic limit combined determinator sample cup, in particular to a novel liquid and plastic limit combined determinator sample cup in a soil test and a method for preparing a sample by using the sample cup. The liquid and plastic limit combined determinator sample cup comprises a sample container, a sleeve, a sample pushing piston and a tray, wherein one end of the sample container is connected with the sleeve; the other end of the sample container is connected with the tray; the sample pushing piston is arranged in the sleeve to press a soil sample during operation; the sample container is a cylindrical cup; the sleeve is a cylindrical barrel; a wide mouth is arranged at one end, connected with the sleeve, of the sample container; a sample container bottom plate is arranged at one end, connected with the tray, of the sample container; a plurality of small holes are formed in the sample container bottom plate. When the sample cup is used for preparing the sample, whether the sample is successfully prepared can be judged by observing the shape of the sample extruded from the small holes in the sample container bottom plate. A study indicates that the method can greatly reduce the discreteness of liquid and plastic limit data of the sample.

Description

technical field [0001] The invention relates to a sample cup of a combined liquid-plastic limit tester, in particular to a novel sample cup for a combined liquid-plastic limit tester in geotechnical tests and a sample preparation method using the sample cup. Background technique [0002] According to the "Geotechnical Test Regulations" SL 237-1999 liquid limit, plastic limit combined tester test operation steps are as follows: [0003] 1. Preparation of samples: It can be prepared by using natural moisture content soil samples or air-dried soil samples. When using natural soil samples, remove soil particles larger than 0.5mm, take about 600g of representative soil samples, mix them evenly, and divide them into 3 parts to make soil samples with different moisture contents, so that their conical penetration depths are respectively 4-6mm, 9 ~11mm and 16~19mm, just let it stand for a period of time; for the air-dried soil sample, pass through a 0.5mm sieve, take about 400g of ...

AI Technical Summary

Problems solved by technology

In operation step 2, the inventor found that when using these two types of sample cups to make samples, even if the same soil sample is selected, it is still difficult to achieve the same compactness when filling the sample cups each time.

Different compactness of the soil samples will lead to different sinking depths of the cone instrument, resulting in a large difference in data

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