A Dynamic Cyclic Direct Shear Test Method for Rock Mass Structural Surface
A test method, dynamic cycle technology, applied in the direction of testing material strength by applying stable shear force, testing material strength by applying repetitive force/pulsation force, instruments, etc., can solve the lack of understanding and lack of dynamic cycle shear characteristics And other issues
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Embodiment 1
[0036] Please refer to figure 1 with figure 2 , the steps of the uniform-velocity unidirectional direct shear test method for the rock mass structural surface are as follows: firstly, the normal load is applied to the rock mass structural surface 3 by controlling the normal oil cylinder 1 and the upper shear box 2; then, the shear load is applied by controlling the shear Push out the lower shear box 5 to the oil cylinder 4 at a constant speed and then act on the rock mass structure surface 3, the rock mass structure surface 3 is the contact between the upper shear box 2 and the rock block in the lower shear box 5 On the other hand, the length of the rock block in the upper shear box 2 along the shear direction is smaller than that in the lower shear box 5, and the moving speed of the lower shear box 5 is determined according to the requirements of the dynamic test, and the speed range can be selected from 0.001 to 1000mm / s; during the test, the test data is recorded by the f...
Embodiment 2
[0038] Please refer to figure 1 with image 3 , the steps of the variable-speed unidirectional direct shear test method for the rock mass structural surface are as follows: first, the normal load is applied to the rock mass structural surface 3 by controlling the normal oil cylinder 1 and the upper shear box 2; then, the shear load is applied by controlling the shear The lower shear box 5 is pushed out to the oil cylinder 4 with a constant shear direction and a changing rate, and then acts on the rock mass structural surface 3. The moving rate of the lower shear box 5 is determined according to the requirements of the dynamic test; The sensor 6 and the displacement sensor 7 record the test data; finally, the test is stopped when the lower shear box 5 moves to the preset position, and the distance between the preset position and the displacement zero point is between 0 and the rock mass in the lower and upper shear boxes Between the difference in length and the rock block in t...
Embodiment 3
[0040] Please refer to Figure 4 with Figure 5, the steps of the unidirectional cyclic direct shear test method for the rock mass structural surface are as follows: first, the normal load is applied to the rock mass structural surface 3 by controlling the normal oil cylinder 1 and the upper shear box 2; then, the shear load is applied by controlling the shear The lower shear box 5 is pushed out to the oil cylinder 4 in a constant shear direction and at a certain rate, and then acts on the rock mass structural surface 3. When the lower shear box 5 moves to the preset position, the tangential oil cylinder 4 is pushed out by controlling the Pull back the lower shear box 5 in turn, the distance between the preset position and the displacement zero point is between the 0 value and the length difference between the rock blocks in the lower and upper shear boxes, and the rock blocks in the upper shear box are always Do not break away from the rock block surface in the lower shear b...
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