A sample preparation device for triaxial compression test of remolded soil

Abstract

The invention discloses a sample preparation device for a triaxial compression test of remolded soil, which comprises an upper pressing plate, a base, a horizontal plate, an exhaust hole, and an exhaust groove, and a sample preparation chamber is formed by the upper pressing plate, the base, and the horizontal plate; Several exhaust grooves are arranged on the upper pressing plate, and exhaust holes are arranged between the exhaust grooves. The invention solves the problems of uneven production of remolded soil samples, difficult control of dry density and moisture content through laterally compacted samples; it can effectively control the dry density of triaxial compression test samples, make samples flat, and meet relevant specification tests. It meets the precision requirements of sample making, easy to operate, and easy to disassemble the sample; through the setting of exhaust grooves and vent holes, the exhaust problem in the process of fine-grained soil sample preparation is solved, and the friction when the upper platen moves down is reduced, and the lower pressure is reduced. The external force required during the pressing process.

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] Triaxial compression test is a relatively perfect method to determine the shear strength of soil. According to the test results, the shear strength, internal friction angle and cohesion of soil can be obtained according to the Moore-Coulomb theory. There are a lot of engineering problems related to the shear strength of reshaped soil in engineering practice, such as backfilling of soil foundation for buildings, backfilling of retaining walls, filling of embankments and earth dams, backfilling of railway and highway subgrades, etc. It is necessary to obtain the shear strength index of the soil through the triaxial compression test of the reshaped soil, which provides a basis for the numerical calculation and construction of the engineering design; at the sam...

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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