Barrel shear tester for soil-rock contact surface mechanics combined with 3D printing technology

Abstract

The invention relates to a barrel-shaped shear tester for soil-rock contact surface mechanics combined with 3D printing technology, which is used to utilize a barrel-shaped rock sample and an annulus formed around the barrel-shaped rock sample and in contact with the outer rock interface of the barrel-shaped rock sample. The rock-shaped soil sample is subjected to the mechanical shear test of the soil-rock contact surface, including: a frame; a rock sample fixing mechanism for fixing the barrel-shaped rock sample; a shear box having a shear box bottom plate corresponding to the bottom surface of the annular soil sample The shear box outer cover corresponding to the outer surface of the annular soil sample, the shear box bottom plate and the shear box outer cover are integrated, and the bottom surface of the shear box bottom plate can be installed on the frame around the axis of the shear box; A pressurizing mechanism, located above the annular soil sample, is used to apply axial pressure to the annular soil sample; a rotating drive mechanism, connected to the rock sample fixing mechanism, is used to drive the barrel-shaped rock through the rock sample fixing mechanism The sample rotates around its axis; the shear monitoring mechanism is used to collect the shear parameters between the outer rock interface of the barrel-shaped rock sample and the annular soil sample.

Description

technical field [0001] The invention relates to a soil-rock contact surface mechanical barrel shear tester combined with 3D printing technology. It is suitable for the technical field of mechanical test of rock-soil contact surface. Background technique [0002] Direct shear is not only a common test instrument for the study of soil shear properties, but also for the study of mechanical properties of soil-rock contact surfaces. The advantages of this instrument are: (1) The morphological conditions of the shear dislocation surface are clear; (2) The mechanical loading conditions are simple and clear; (3) The test steps and processes are relatively simple. However, there are also the following defects: (1) Only unidirectional short-displacement shearing can be performed, which is often used to obtain peak strength, but it is difficult to obtain residual strength; (2) During the test process, the shear area continues to decrease, and the test data needs to be Correction. ...

AI Technical Summary

Problems solved by technology

However, there are also the following defects: (1) only one-way short-displacement shearing can be performed, which is often used to obtain peak strength, but it is difficult to obtain residual strength; (2) the shear area continues to decrease during the test, and the test data needs fix

However, it is still rare to use the combination of 3D laser scanning technology and 3D printing technology to carry out physical shaping of rock mass structural surfaces, as well as application and physical test research.

And there is no 3D shaping concept based on the point cloud data of the planar structural surface for equal-proportion barrel-shaped structural surface

Images