Sample production apparatus and sample production method of layered rock-soil body sample

Abstract

The present invention discloses a sample production apparatus and a sample production method of a layered rock-soil body sample. The sample production apparatus is characterized by comprising a first layer sample production device and a plurality of second layer sample production devices, wherein the first layer sample production device and the second layer sample production devices are movably connected, the first layer sample production device comprises a sample production base (1), universal cylinders (2) and an auxiliary cylinder (3), the sample production base (1), the universal cylinders (2) and the auxiliary cylinder (3) are sequentially and movably connected from bottom to top, the second layer sample production device comprises a sample production auxiliary top cover (9) and the two universal cylinders (2) arranged in an up-and-down manner, the sample production auxiliary top cover (9) and the two universal cylinders (2) are sequentially and movably connected from bottom to top, the connection surfaces of the movable connections are respectively provided with an annular concave groove (8), and O-shaped rubber gaskets (4) are arranged inside the annular concave grooves (8). According to the present invention, with the apparatus and the method, the densities of each layer of the rock-soil body sample can be accurately controlled, such that the accurate and reliable test result can be obtained when the unidirectional freeze thawing cycling test, the penetration test, the compression test and other tests of the layered rock-soil body sample are performed.

Description

technical field [0001] The invention relates to a sample preparation device and a sample preparation method of layered rock and soil samples, belonging to the technical fields of hydraulic engineering and highway engineering. Background technique [0002] In infrastructure construction, it is common for rock and soil to be paved in layers according to different functions. In water conservancy projects, the paving of the dam body will have the phenomenon that coarse aggregates, fine aggregates, anti-seepage bodies, reverse filter materials, etc. are paved according to different functions and layers. In cold regions, the treatment of the cushion material in the antifreeze area of ​​the building is different from that in other areas, and there will also be stratification. In highway engineering, the subgrade is also paved by layers of rock and soil with different grades, and there are also layered phenomena. For delamination, engineers only pay attention to the characteristic...

AI Technical Summary

Problems solved by technology

Moreover, traditional single-layer sample preparation is usually compacted in layers. If the second layer of sample preparation is still compacted on the basis of the first layer, the density and porosity of the lower layer will increase with the number of compacted layers in the upper layer. The overall soil density is not easy to control

[0003] It is very common in construction projects to require the same soil to be paved in layers with different densities or layers of different soil materials to meet different functions, and single-layer compaction is not good for controlling the density of the lower layer, so a layered layer was invented. The sample preparation device and sample preparation method of rock-soil samples are necessary

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