High-precision testing device for basic friction angle of material interface and use method of high-precision testing device

Abstract

The invention discloses a material interface basic friction angle high-precision testing device and a using method, the material interface basic friction angle high-precision testing device comprises a supporting platform and a transmission device arranged on the supporting platform, the output end of the transmission device is connected with a fixing device for placing test pieces, the test pieces comprise an upper disc test piece and a lower disc test piece, the lower disc test piece is fixed on the fixing device, and the upper disc test piece is fixed on the fixing device. The upper disc test piece is arranged on the lower disc test piece in an overlapping manner, and the transmission device drives the fixing device to incline at an inclination angle of 0-90 degrees until the upper disc test piece and the lower disc test piece are staggered. Low-speed and stable operation of the test platform is completed through combination of the large gear and the small gear, accurate identification and accurate control of instantaneous sliding are achieved through the electromagnetic triggering device, and effective testing and safe testing of rock test pieces of various sizes are completed in combination with the sample clamping sleeve and the limiting mechanical device. The testing device and method have the advantages of being stable in operation, high in precision, convenient and fast to operate, large in testing range (multiple in size and 0-90 degrees), high in portability, high in efficiency, long in service life and the like.

Description

technical field [0001] The invention relates to the technical field of rock mechanics testing equipment, in particular to a high-precision testing device for basic friction angle of a material interface and a method for using it. Background technique [0002] A large number of engineering examples show that rock mass with structural planes is a common type of complex engineering medium in projects such as tunnels, slopes, and underground powerhouses. Driven by external engineering forces, rock mass mainly undergoes shear slip along structural planes and rupture. It can be seen that the mechanical properties of structural planes play a major role in controlling the stability of rock mass. In the field of rock mechanics, the friction angle of rock mass structural planes is the basis and key parameter of structural planes, so it is often the focus of attention and research by experts and scholars. [0003] The friction angle of the rock structure surface is usually obtained b...

AI Technical Summary

Problems solved by technology

However, the existing friction angle testing device still has the following deficiencies: (1) when measuring the friction angle of a square rock structure surface, researchers use various size parameters such as 10cm*10cm*4cm, 5cm*5cm*2cm, etc., the existing Most of the test equipment cannot meet the test requirements of various series of scales; (2) the test process often realizes the change of the inclination angle by lifting the inclined plate surface, and the angular velocity of this process is often large and the operation is not stable enough. Whether or not, human subjectivity is strong and judgment delay will inevitably occur for instantaneous sliding, and the result usually has a large error; (3) The structural surface sample should rotate with the test platform during the test to reach the peak value of the structural surface When the friction angle is high, the upper and lower plates of the rock structural surface sample will be misaligned, and it is easy to overturn during the test process, with poor controllability and low safety

Images