Confining pressure loading device for laboratory rock strength

Abstract

The invention relates to a confining pressure loading device for laboratory rock strength. The confining pressure loading device comprises a cylindrical drum, the lower end of the drum is fixedly arranged on a bearing seat, a loading cover for closing the drum is arranged on the upper end of the drum, the drum is internally sheathed with a sealing element, the sealing element consists of an upper lantern ring and a lower lantern ring which are connected by upright threads and are symmetrical, the peripheries of the two lantern rings are connected with the inner wall of the drum by threads, waterproof adhesive tapes are arranged on external threads of the two lantern rings, the sealing part is internally provided with a rubber sleeve for wrapping a rock test piece, an interlayer cavity is formed between the rubber sleeve and the inner wall of the drum, and the drum has a through hole which is communicated with the interlayer cavity. The circumferentially evenly distributed confining pressure applied by the confining pressure loading device can ensure uniform distribution of stress to the greatest extent before the rock test piece is damaged, thus the test effectiveness and the reliability of the test results can be improved; on the basis of meeting the laboratory demand, the device is simple in structure, easy for connection components to assemble and disassemble, and good in sealing property.

Description

technical field [0001] The invention relates to a confining pressure loading device for a rock test piece in a rock mechanics test, in particular to a confining pressure loading device for rock strength testing in a laboratory. Background technique [0002] Civil engineering fields such as construction, transportation, and water conservancy often involve the interaction between rock-soil mass and water. When rock-soil mass interacts with water in actual engineering, it is also subjected to the pressure of water (aqueous solution containing various chemical components). Research The purpose of rock dynamic properties is to understand and master the dynamic properties of rock under different loading histories and conditions, so as to provide a basis for the design and excavation of rock dynamic slopes and deep rock mass engineering. In underground engineering, the compressive strength of rock is related to the overlying depth of the rock mass (confining pressure load), and the...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects that the existing confining pressure loading device is easy to cause the stress balance of the rock specimen to be damaged in advance, or the oil leakage and the equipment are relatively complicated during the test process, and to provide a confining pressure device for rock strength testing in the laboratory. loading device

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