Test device and test method for measuring shearing strength characteristics on different shearing surfaces
A technology of shear strength and test device, which is applied in the direction of strength characteristics, using a stable shear force to test the strength of materials, measuring devices, etc., to achieve the effect of low cost and simple operation
Inactive Publication Date: 2013-04-03
BEIHANG UNIV
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Problems solved by technology
However, in the conventional direct shear test, the shear strength can only be measured under the condition that the shear plane is parallel to the deposition plane (i.e. ψ=0° / 180°), which has serious deficiencies and cannot satisfy the actual engineering needs
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[0029] The test device and test method for measuring the shear strength characteristics on different shear planes provided by the present invention will be described in detail below in conjunction with the accompanying drawings and examples.
[0030] The described test device is a new type of direct shear test box, such as figure 2 As shown, the new direct shear test box is mainly composed of the base A, the lower side wall B of the force application end, the upper side wall C of the force application end, the lower side wall D of the force measurement end, the upper side wall E of the force measurement end, the front side wall F and the rear side wall G. . Such as Figure 2A As shown, base A has a base front side wall and a base rear side wall. The lower side wall B of the force-applying end and the lower side wall D of the measuring end are connected to the left and right sides of the front side wall and the rear side wall of the base A by bolts, and after the connection,...
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The invention discloses a test device and a test method for measuring shearing strength characteristics on different shearing surfaces, which belong to the technical field of civil engineering. The test device is a direct shearing test box, and an included angle Psi between each shearing surface and a depositional surface can be randomly changed in the range of 0 degree to 18 degrees during the test so as to perform the shearing strength measuring test. Compared with the constituent parts of the conventional direct shearing test box, the constituent parts of the direct shearing test box of the test device can be independently dismounted and are connected with one another by bolts, and the constituent parts can be assembled according to different requirements in the sample manufacturing process, so that certain sides and the top of the direct shearing test box can be opened. The shearing test process is the same as the conventional direct shearing test process, so that the operation issimple and can be carried out in almost in all civil engineering laboratories.
Description
technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a test device and a test method for measuring the shear strength characteristics of granular materials on different shear planes. Background technique [0002] In engineering practice, granular materials such as sand and gravel can be used as materials, foundations and surrounding media. Due to gravity deposition or artificial rolling, these granular materials such as sand and gravel in nature generally have anisotropic properties. That is: when loaded in different directions, the material has different physical and mechanical properties. Such anisotropic properties of granular materials have important theoretical and engineering implications in civil engineering. For example, at present, in the calculation of the bearing capacity of foundation soil, slope stability and earth pressure in actual engineering, the limit equilibrium analysis method is still ma...
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IPC IPC(8): G01N3/24G01N3/02
Inventor 童朝霞石光周少鹏
Owner BEIHANG UNIV