Vertical combined mold for preparing triaxial compression test sample and use method

Abstract

The invention discloses a vertical combined mold for preparing a triaxial compression test sample and a use method. The vertical combined mold comprises a compaction auxiliary structure and a sample preparation forming mold. The compaction auxiliary structure comprises a compaction cylindrical rod, a central limiting hole-attached plate, a movable hollow cylinder, a vertical reinforcing rib plate and a rigid cylindrical base; the sample preparation forming device comprises a rigid annular hoop, a connecting rod, a transparent valve and the like. During numerical control machining, the center limiting auxiliary hole plate, the vertical reinforcing rib plate and the rigid cylindrical base are cast into a whole through high steel, during use, the three transparent valves are placed into the upper rigid annular clamp and the lower rigid annular clamp, the positions are adjusted, the left connecting rod and the right connecting rod are locked through the limiting screws, and the upper rigid annular clamp and the lower rigid annular clamp are effectively prevented from moving. The method is simple and convenient to operate, and the compact and uniform triaxial sample with a complete and smooth surface can be obtained on the premise of ensuring the sample preparation quality. The problems that a conventional three-axis sample preparation mold is complex in operation process, sample demolding is difficult, and obtained samples are uneven in density are effectively solved.

Description

technical field [0001] The invention relates to the technical field of triaxial test of geotechnical engineering, in particular to a vertical combined mold for preparing a triaxial compression test sample and a method for using the same. Background technique [0002] The triaxial compression test is one of the basic geotechnical tests. According to the engineering requirements, the unconsolidated undrained shear test, the consolidated undrained shear test and the consolidated drained shear test can be used. Compared with the direct shear test, the triaxial test results are more The direct shear test is closer to the actual project, and can be used to test the strength parameters, cohesion and internal friction angle, to carry out the dissipation test of soil pore water pressure, static lateral pressure coefficient test, dynamic characteristic test and penetration test, etc. It is widely used in engineering research. [0003] Soil samples need to be prepared for triaxial com...

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