A test method for rock seepage-stress coupled shear rheology test
A technique of rheological testing, test methods, applied in the direction of testing the strength of materials by applying a stable shear force, etc.
Active Publication Date: 2019-04-30
HOHAI UNIV
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Problems solved by technology
At present, in the rock shear rheological tests, most of the horizontal shear planes are studied in the form of horizontal loading, and the shear rheological tests with different angles under vertical loading have not been carried out.
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Embodiment
[0027] Embodiment: a kind of test method of seepage-stress coupled shear rheological test, such as Figure 1~5 As shown, the seepage-stress coupled shear rheology test box is composed of the upper and lower test boxes 1 and 2 with the slope as the contact surface. The contact surface is the shear surface with a certain shear angle α. The upper and lower test boxes A hollow cylinder is formed between the boxes 1 and 2, and high-performance rubber sleeves 4 and 6 are placed in the hollow cylinder, and the inner diameter of the rubber sleeves 4 and 6 is the same as the outer diameter of the rock sample 8. Put the rock sample 8 into the seepage-stress coupled shear rheology test box, then put the seepage-stress coupled shear rheology test box into the copper sealing sleeve 12, and put it on the rock triaxial tester Fix it, apply confining pressure and osmotic pressure, and finally apply axial pressure to conduct seepage-stress coupled shear rheological test.
[0028] Firstly, con...
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The invention discloses a testing method of a rock seepage-stress coupling shearing rheological test. The testing method comprises the following steps: putting a rock sample into a hollow cylinder formed between upper and lower test boxes in a seepage-stress coupling shearing rheological test box, wherein a contact surface of the upper and lower test boxes is an inclined plane; applying confining pressure on a sealing sleeve and fixing; applying axial pressure to a pressure-bearing surface of the top of the upper test box, wherein water seepage holes introducing to the contact surface from upper and lower surfaces are formed in the upper and lower test boxes respectively; applying seepage pressure; and converting the shearing strain of the rock sample according to the horizontal strain obtained by a strain gauge mounted at the bottom of the lower test box. With the adoption of the testing method, the seepage-stress coupling shearing rheological test under an inclined angle is carried out through applying the axial pressure, and the shearing stress is converted by an inclined angle, namely a shearing angle alpha, between the axial pressure and a shearing plane; the seepage-stress coupling shearing rheological amount is converted through the strain gauge at the bottom end of the lower test box, and the shearing angle alpha; and thus the testing method has a reference value on quantitatively researching a shearing rheological property problem of rocks under a seepage-stress coupling condition.
Description
technical field [0001] The invention relates to the field of rock mechanics and engineering, in particular to a rock seepage-stress coupled shear rheological test. Background technique [0002] The study of rock permeability characteristics is an important research topic in rock mechanics at present. It has very important engineering background and significance, such as excavation of dam foundations, tunnels or caves, oil and gas exploitation, etc. Groundwater is an important factor affecting the stability of rock engineering. The shear test under the condition of rock seepage-stress coupling is the basis for studying the mechanism of earthquakes and landslides in engineering, so it has attracted the attention of rock mechanics workers at home and abroad. [0003] The rheological damage of rocks is ubiquitous, and the damage of many rock mass engineering is caused by the rheological damage of rocks. The rheological test of rock is the basic means to study the mechanical pro...
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IPC IPC(8): G01N3/24
CPCG01N3/24
Inventor 刘琳徐卫亚王环玲王如宾王伟
Owner HOHAI UNIV