Experimental method and apparatus for shearing of structural surface of columnar jointing

Abstract

The invention discloses an experimental method for shearing of a structural surface of a columnar jointing. The method comprises adjusting a rock structural surface to be located in a shearing seam of upper and lower shearing boxes; sleeving screw sleeves to five internally-inserted vertical screws, using plastic films to separate and wrap; vertically moving the internally-inserted vertical screws through adjusting rods, so that the structural surface of the columnar jointing rock is located between the shearing seam; selecting proportional epoxy resin mortar to form epoxy resin mortar; and pouring the epoxy resin mortar into the upper and lower shearing boxes for cooling and solidification. The invention further discloses an experimental apparatus comprises the upper and lower shearing boxes, the internally-inserted vertical screws and the adjusting rods, wherein a bottom of the lower shearing box is provided with vertical screw holes, walls of the lower shearing box are provided with horizontal screw holes, and contacted parts of the adjusting rods and the internally-inserted vertical screws form worm structures. According to the invention, fine adjustment of the rock position can be realized, a surface of the epoxy resin mortar can be always maintain as a plain, a molding is relatively good, problems of rock sinking in cement mortar can be solved, and thus the structural surface of the rock can be easily positioned.

Description

technical field [0001] The invention belongs to the field of rock mechanics, in particular to an experimental method for shearing of columnar joint structural planes, and also relates to an experimental device for shearing of columnar joint structural planes, which is suitable for shearing when irregular rock blocks contain irregular joint planes experimental occasions. Background technique [0002] There are a large number of structural planes in the rock mass, which makes the rock mass easily deformed and damaged along these structural planes. Therefore, the mechanical properties of the structural planes, especially the determination of the shear strength, have always been one of the key points in the study of rock mass mechanical properties. The upper and lower shear boxes of the traditional shear instrument are mainly designed for the characteristics of the soil. For rocks, such as columnar joints, irregular blocks account for the majority, and it is difficult to conduct...

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Problems solved by technology

[0004] The purpose of the present invention is to aim at the above-mentioned problem that prior art exists, provide a kind of experimental device of shearing of columnar joint structure plane, also provide a kind of experimental method of shearing of columnar joint structure plane, solve the problems in the prior art Difficult to locate irregular joint surfaces in regular rock blocks

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