A sample preparation device and sample preparation method for bidirectional layered compaction of remolded soil

Abstract

The invention discloses a remolding soil two-way layered compaction sample preparation device and a sample preparation method, comprising a sample preparation cylinder and two sets of briquetting components; the sample preparation cylinder includes a left split mold, a right split mold, and an upper fixing ring and the lower fixing ring; each set of briquetting components includes briquetting blocks, and the outer diameter of each briquetting block is equal to the inner diameter of the sample preparation cylinder; the heights of each briquetting block are: h 环 , (h 环 + h 土 ), (h 环 +2h 土 ),..., among them, h 环 is the height of the upper or lower fixing ring, h 土 Reshape the soil sample height for a single layer. In the present invention, a cylindrical hollow stainless steel block with a prefabricated height is used for sample compaction, and the compaction height can be accurately controlled during the compaction process, which avoids the phenomenon of over smashing that may occur in the conventional compaction process, and improves the precision of sample preparation at the same time It also improves the efficiency of sample preparation. The whole sample preparation device has simple structure, low manufacturing cost, simple and clear sample preparation process, and convenient and fast operation.

Description

technical field [0001] The invention relates to the technical field of geotechnical tests, in particular to a sample preparation device and a sample preparation method for bidirectional layered compaction of remolded soil. Background technique [0002] In the field of geomechanics, the preparation of remolded soil samples is widely used in laboratory experiments. At present, the commonly used reshaping soil geotechnical test sample preparation equipment usually adopts a sample preparation device with one-way vertical force and multi-layer compaction method, or a sample compression mold of a certain specification. These two methods both have uneven structure of each layer of the sample, different density indicators of each layer, discrete test data, and uncertain results due to multi-layer unidirectional vertical compaction sample preparation or compaction sample preparation. And problems such as poor fitting of related test curves. [0003] Two-way compaction is a better w...

AI Technical Summary

Problems solved by technology

These two methods both have uneven structure of each layer of the sample, different density indicators of each layer, discrete test data, and uncertain results due to multi-layer unidirectional vertical compaction sample preparation or compaction sample preparation. And problems such as poor fitting of related test curves

[0003] Two-way compaction is a better way of thinking. For example, patent CN200910063449.1 reports a flat-push two-way sample preparation instrument. This invention uses horizontal and two-way simultaneous application of loads. By applying horizontal and two-way loads, each layer of the sample can be as compact as possible. The density is consistent, but with the horizontal sample preparation method, there will be uneven distribution of the loose soil sample in the vertical direction when it is loaded into the sample preparation cylinder, which brings the error hidden danger of uneven distribution of the initial structure

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