Deformable large-size soil box structure of true triaxial experiment of soil engineering

Abstract

The invention discloses a deformable large-size soil box structure of true triaxial experiment of soil engineering. The deformable large-size soil box structure is mainly used for large-size model experiment of the true triaxial experiment of the soil engineering. The deformable large-size soil box structure comprises a workbench, side loading plates, a normal loading plate and a bottom plate, wherein the four vertical side loading plates for bearing a horizontal load encircles to form a soil box main body, adjacent side loading plates are connected by a side guide device, the normal loading plate is arranged above the soil box main body, a normal constraint framework is arranged at the periphery of the normal loading plate, and a normal loading plate guide device is further arranged on the normal loading plate. With the combined application of the normal constraint framework and the normal loading plate, vertical limited deformation of the soil box can be achieved, and direct-angle connection between plates is ensured; by ingenious design such as the side loading devices, the side guide devices and a side sliding device, free and limited deformation of the soil box and real-time coaxial loading of a horizontal direction are achieved, the running safety and reliability of the whole true triaxial experiment system is ensured, and the deformable large-size soil structure has remarkable economic and practical value.

Description

technical field [0001] The invention belongs to the technical field of soil mechanics indoor tests, in particular to a deformable large-size soil box structure for true triaxial geotechnical tests, which is suitable for true triaxial geotechnical tests. Background technique [0002] The geotechnical true triaxial test system can simulate the mechanical properties of soil under unequal stress in three directions. Compared with the conventional triaxial test system, the true triaxial test can more reasonably explain the mechanical properties of soil under actual site conditions. In the geotechnical true triaxial test system, the three directions are non-equivalent loading, that is, the applied stress in the three directions satisfies σ 1 >σ 2 >σ 3 . Therefore, in the true triaxial test system, the soil sample is a cubic specimen, and by applying different stresses in three orthogonal directions, the mechanical properties of the soil sample under the action of differe...

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Problems solved by technology

[0004] In order to solve the deficiencies of the existing true triaxial test midpoint test and meet the change of the soil box with the stress of the soil sample, the present invention proposes a deformable large-scale soil box structure in the true triaxial test of geotechnical engineering, which can be used It is used to carry out geotechnical true triaxial large-scale model tests to ensure that the soil box undergoes reasonable and limited deformation according to the applied principal stress during the test process, ensuring the safety of the test

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