Geotechnical three-axis experiment sample radial deformation sensor and test method
A technology of radial deformation and triaxial test, applied in the direction of electric/magnetic solid deformation measurement, instruments, measuring devices, etc., can solve the problems of limited application, and achieve the effect of simple production, low cost and simple structure
Inactive Publication Date: 2017-04-26
唐亮 +1
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However, this method requires that the pressure chamber must be transparent, and it can be used in conventional geotechnical triaxial tests, but its application in high-pressure triaxial tests is limited
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[0020] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings, but it is not limited thereto. Any modification or equivalent replacement of the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention should be covered by the present invention. within the scope of protection.
[0021] Such as figure 1 As shown, the main body of the geotechnical triaxial test sample radial deformation sensor provided by the present invention is an annular circlip 1, and this annular circlip 1 is an unclosed ring with an opening 2, and its circumferential length is less than The circumference of the cylindrical rock soil sample is 4 to ensure a close fit with the latex film; the annular circlip 1 is made of an elastic material with a ratio of plastic strain to elastic strain greater than 1.5:1, which can be opened and closed repeatedly and defor...
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The invention discloses a geotechnical three-axis experiment sample radial deformation sensor and a test method. The sensor comprises an annular jump ring with an opening and strain gauges, wherein circumferential length of the annular jump ring is smaller than cylindrical geotechnical sample perimeter, and the three strain gauges are uniformly distributed along an outer side of the annular jump ring circumferentially. The test method comprises steps that 1, the annular jump ring is sleeve at an outer side of the cylindrical geotechnical sample, and the sensor is guaranteed to be horizontal; 2, strain gauge leading wires are connected with a data acquisition instrument, a geotechnical test member is loaded, resistance values of the strain gauges are acquired in real time, and backstepping of a radial deformation value of a geotechnical sample is carried out. The sensor is advantaged in that simple structure, easy manufacturing, batch production and low cost are realized, a three-axis experiment device is not changed, an experiment effect is not influenced by the sensor, no additional condition is required, and three-axis experiment nonsaturation sample radial deformation tests under high pressure condition can be realized.
Description
technical field [0001] The invention relates to a radial deformation sensor and a testing method of a cylindrical test piece, in particular to a device and a testing method for testing the radial deformation of an unsaturated rock and soil sample in a high-pressure triaxial test. Background technique [0002] The triaxial test is an important test in soil mechanics. Its test principle is to place a cylindrical soil sample in a closed pressure chamber, and simulate the actual force of the soil by applying uniform surrounding pressure in all directions and axial deviation stress. Based on this, the relationship between strength and stress-strain of soil is studied. The main steps are: put the latex film on the outside of the cylindrical rock and soil sample and place it in a sealed pressure chamber; the lower end of the latex film is bound on the base, and the upper end is bound on the sample cap, so that the pore water in the sample and the pressure chamber The water in the ...
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Login to View More IPC IPC(8): G01B7/16G01N3/06
CPCG01B7/18G01N3/066
Inventor 闫穆涵田爽孔祥勋唐亮凌贤长蔡德钩
Owner 唐亮