Remolded soil triaxial compression test sample preparation device

Abstract

The invention discloses a remolded soil triaxial compression test sample preparation device which comprises an upper pressing plate, a base, a transverse plate, air exhausting holes and air exhausting grooves. A sample preparation chamber is formed by the upper pressing plate, the base and the transverse plate; the multiple air exhausting grooves are formed in the upper pressing plate, and the air exhausting holes are formed between the air exhausting grooves. By means of the remolded soil triaxial compression test sample preparation device, the problems that remolded soil sample preparation is uneven, and the dry density and the moisture content are not prone to being controlled are solved by transversely ramming a sample; the dry density of the triaxial compression test sample can be effectively controlled, the prepared sample is flat, the related standard sample preparation accuracy requirement is met, operation is convenient to achieve, and the sample is easily disassembled;, the aim of air exhausting in the fine soil sample preparation process is achieved through the air exhausting grooves and the air exhausting holes, friction generated when the upper pressing plate is downwards moved is reduced, and external force needed in the downwards-pressing process is reduced.

Description

technical field [0001] The invention relates to a civil engineering geotechnical test equipment, in particular to a sample preparation device for a triaxial compression test of remolded soil. Background technique [0002] The triaxial compression test is a relatively perfect method to measure the shear strength of soil. According to the test results, the internal friction angle and cohesion of the soil shear strength can be obtained according to the Karl Coulomb theory. In engineering practice, there are a large number of engineering problems related to the shear strength of remolded soil, such as building backfill foundation, backfill of retaining wall, embankment and earth dam filling, railway and road backfill subgrade, etc. It is necessary to obtain the shear strength index of the soil through the triaxial compression test of the reshaped soil, which provides the basis for the numerical calculation and construction of the engineering design; at the same time, the triaxia...

AI Technical Summary

Problems solved by technology

The advantage of this method is that it is easy to operate, and it can also control the design of the dry density of the overall sample. The disadvantage is that the sample is not uniform, and the upper and lower ends of the sample are often dense, and the middle is relatively loose.

③Compact method, the required dry density and moisture content of the wet soil sample, using the compaction test method, use the bulldozer to push out the compacted soil sample, put the compacted soil sample on the triaxial compression test cutting soil plate, press The sample is prepared by the undisturbed soil sample preparation method. The advantage of this method is that a uniform sample can be obtained. The disadvantage is that the steps are cumbersome, especially the dry density of the sample is still difficult to control.

[0004] Therefore, there are many problems in the existing technologies such as uneven production of remolded soil triaxial compression test samples, difficult control of dry density, large sample preparation errors, inconvenient operation, and cumbersome disassembly of samples.

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