Triaxial test soil sample preparation device and sample preparation method

Abstract

The invention relates to a triaxial test soil sample manufacturing device and a sample manufacturing method, the device comprises a bidirectional constant-speed compaction structure, the bidirectional constant-speed compaction structure comprises a support frame and a telescopic pressure applying assembly, the support frame is detachably connected with a mold assembly, and two ends of the mold assembly are movably connected with the telescopic pressure applying assembly of the bidirectional constant-speed compaction structure; during sample preparation, a weighed soil body is loaded into the mold assembly, the soil sample is simultaneously compacted from the two ends of the mold assembly through the bidirectional constant-speed compaction structure, graded compaction and debristling are not needed, the prepared soil sample is uniform and dense, demolding is convenient after sample preparation, the structure is reasonable, operation is easy, the sample preparation efficiency is high, and the good application value is achieved.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering test devices, and in particular relates to a triaxial test soil sample preparation device and a sample preparation method. [0002] technical background [0003] The existing triaxial test soil sample production method is to fix the three-lobe mold of the soil sample on the base, and compact or compact it in one direction by manual compaction or power device, such as Chinese patent application CN113125221A, in order to obtain a triaxial soil sample with uniform density , generally completed through 3 to 4 layers. Therefore, before making soil samples, the bulk soil for making a triaxial soil sample is first divided into 3 to 4 parts by weight, and then each part is sequentially added to a three-petal mold and compacted. By controlling the number of times of compaction, the height of each layer is controlled to be the same , to ensure the uniformity of the soil sample density. How...

AI Technical Summary

Problems solved by technology

This makes it difficult to accurately control the thickness of each layer of the triaxial soil sample, so it is difficult to control the uniform density of the soil sample

Soil samples are compacted in layers, which also makes the sample preparation process cumbersome

The tedious sample preparation process has caused many factors affecting the quality of the soil sample, and the control is not strict, so the problem of soil sample layering and fracture is prone to occur.

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