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Device for measuring shearing strength index of rock-soil specimen and measuring method

A technology of shear strength and test pieces, which is applied in the direction of measuring device, using stable shear force to test material strength, strength characteristics, etc., can solve the problem of inability to measure the shear strength index of cylindrical rock and soil, and reduce the discreteness of data And other issues

Inactive Publication Date: 2016-04-20
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a device and a measurement method for measuring the shear strength index of rock and soil specimens, which can solve the problem that the existing device cannot measure the shear strength index of cylinder rock and soil. The rock-soil specimens are sheared multiple times to obtain multiple shear data, and the shear strength index of the rock-soil specimens is calculated, which greatly reduces the discreteness of the data and the test results are accurate.

Method used

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  • Device for measuring shearing strength index of rock-soil specimen and measuring method
  • Device for measuring shearing strength index of rock-soil specimen and measuring method
  • Device for measuring shearing strength index of rock-soil specimen and measuring method

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Effect test

Embodiment 1

[0055] Such as Figure 1-4 All, a device for measuring the shear strength index of rock and soil specimens, which includes a horizontal base 12, and a plurality of rollers 11 are arranged on the upper horizontal plane of the horizontal base 12;

[0056] A rock-soil cylindrical specimen shear assembly is placed on a plurality of rollers 11;

[0057]In the rock-soil cylindrical specimen shearing assembly, the upper semicircular sample groove 13 engraved with the angle scale 4 is fixedly installed under the pressure bearing surface 2 through the fastening bolt 3, and the pressure bearing surface 2 is provided with an angle scale corresponding to the angle scale. Cooperating indicating arrows, the lower semicircular sample groove 6 and the upper semicircular sample groove 13 are spliced ​​and combined to form a cylinder, and the lower semicircular sample groove 6 and the upper semicircular sample groove 13 are respectively provided with Sample loading area, the two sample loading...

Embodiment 2

[0063] The installation and working process of the above-mentioned device are as follows:

[0064] First press the pressure-bearing surface 2 and the upper semicircular sample groove 13 according to the pre-designed angle (when the upper semicircular sample groove 13 and the lower semicircular sample groove 6 are spliced ​​together, the tooth joint 5 and the bottom of the horizontal base The angle a formed by the sides, 50°≤a≤70°, adjusted according to the angle indicated by the indicating arrow), connected together by fastening bolts 3, and then according to the designed angle of the upper semicircular sample groove 13, the lower The semicircular sample groove 6 and the shear box 14 are rotated to a corresponding angle so as to match the upper semicircular sample groove 13;

[0065] Then the lower semicircular sample groove 6 and the shear box 14 are connected and fixed together by the thin plate 10 with bolts and the mounting hole 9;

[0066] Reload;

[0067] Cover the upp...

Embodiment 3

[0070] A method for measuring the shear strength index of rock and soil specimens by using the above-mentioned device, the method comprises the following steps:

[0071] 1) take off the upper semicircle sample tank 13 of above-mentioned device and weigh, obtain its quality as M kilograms;

[0072] 2) select the cylindrical geotechnical specimen to be tested, and grind the two ends of the geotechnical specimen;

[0073] 3) The first sample loading: put the cylindrical rock and soil specimen into the lower semicircular sample groove 6 of the above device, and then fix the upper semicircular sample groove 13 and the lower semicircular sample groove 6 , rotate, so that when the lower semicircular sample groove 6 and the upper semicircular sample groove 13 are spliced ​​together, the angle a formed by the teeth joint 5 and the bottom edge of the horizontal base 12 1 , 50°≤a 1 After ≤70°, the lower semicircular sample groove 6 is fixedly connected with the shear box 14, such as ...

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Abstract

A device for measuring the shearing strength index of a rock-soil specimen comprises a horizontal base, wherein a plurality of rolling shafts are arranged on the upper horizontal plane of the horizontal base. A rock-soil cylinder specimen shearing assembly is arranged on the rolling shafts. In the rock-soil cylinder specimen shearing assembly, an upper semicircular specimen groove carved with an angle scale disc is fixedly installed below a bearing surface through a fastening bolt. According to the device for measuring the shearing strength index of the rock-soil specimen and a measuring method, the problem that an existing device cannot measure the shearing strength index of cylindrical rock-soil is solved, multiple pieces of shearing data are obtained by shearing a conventional cylindrical rock-soil specimen multiple times to calculate the shearing strength index of the rock-soil specimen, the data discreteness is greatly reduced, and a testing result is accurate.

Description

technical field [0001] The invention relates to a shear test device and method for geotechnical engineering, in particular to a device and a method for measuring the shear strength index of rock and soil specimens. Background technique [0002] With the advancement of science and technology, there are more and more methods for measuring the shear strength index of rock and soil specimens, but the accuracy of the experimental data obtained from the test is also different. Existing devices for measuring the shear strength index of rock and soil specimens, such as direct shear instrument (shear box) compression shear test (single-sided shear), cubic specimen single-sided shear test, specimen end compression double-sided shear test Test, angle die compressive shear test (variable angle shear test) etc. compare, the sample that these test tests are all cubes, can't measure the shear strength index of cylinder rock and soil, also can't test to soil sample. Contents of the invent...

Claims

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Application Information

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IPC IPC(8): G01N3/24
CPCG01N3/24G01N2203/0025G01N2203/0266
Inventor 刘杰徐春霖李建林杨渝南常德龙
Owner CHINA THREE GORGES UNIV
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