A rock expansion test device

Abstract

The invention discloses a rock expansion test device, which comprises a cover body, wherein an upper force transmission mechanism is arranged on the top plate of the cover body, a bottom tray is arranged on the lower part of the cover body, and a testing mechanism for rock expansion test is arranged on the bottom tray . Using a separate testing mechanism, after the rock specimen is placed, water is introduced into the testing mechanism, which can be used for the measurement of various rock expansion indicators such as expansion force, expansion rate and water absorption rate of the rock specimen, and the device is placed on the rock testing machine Various rock expansion indexes under different axial pressures can be measured, so that various parameters of the rock can be collected.

Description

technical field [0001] The invention relates to the field of rock expansion, in particular to a rock expansion test device. Background technique [0002] When rock meets water, a series of physical and chemical reactions will occur, which will cause the volume expansion of rock and the change of mechanical properties. In engineering, a type of rock that is prone to volume increase, fragmentation and decomposition under the physical and chemical action of water over time is defined as expansive rock. Expansive rock has strong expansion properties. When the rock mass is disturbed, especially when it encounters water, its properties often change dramatically, resulting in volume expansion, which will generate huge expansion pressure on structures, seriously affect the stability of the project, and cause geological disasters. Experimental testing of rock expansibility is an important work in the field of geotechnical engineering. Rock expansibility test mainly includes expansi...

AI Technical Summary

Problems solved by technology

[0003] At present, the existing technology mostly uses a dial gauge to measure the axial deformation of the expansive rock after it meets water. The dial gauge adopts the measurement method of manual reading, which not only has poor accuracy and is prone to human errors, but also has a large gap between the time of immersion in water and the final reading. There is also a problem of asynchrony, which cannot realize real-time simultaneous measurement of expansion deformation and accurate readings

At the same time, the existing equipment usually cannot fully realize the comprehensive measurement of the rock expansion force, rock expansion rate and rock water absorption under different axial pressure conditions. Guaranteed loading accuracy

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