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Soil two-dimensional fracture test method and test device

A fracture test and soil technology, applied in the direction of testing material strength by applying stable shear force, testing material strength by applying stable tension/pressure, etc., can solve the problem of inconvenient fracture comparison research, and it is difficult to obtain continuous distribution characteristic pressure The relationship between shear force, soil sample strain and critical stress, etc.

Active Publication Date: 2018-04-10
重庆山渝道科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, even so, it is still difficult to obtain the relationship between the combined compressive shear force, soil sample strain and critical stress with a good continuous distribution characteristic in practice.
At present, fracture failure problems such as compression-shear type and tension-shear type require independent research on different test devices, which is not convenient for comparative research among various types of fracture problems

Method used

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  • Soil two-dimensional fracture test method and test device
  • Soil two-dimensional fracture test method and test device
  • Soil two-dimensional fracture test method and test device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The test device includes a sample, loading plate I1 and loading plate II2. The loading plate I1 and the loading plate II 2 are identical loading plates, and together constitute a loading fixture. The installation of the test device, the test consists of pins passing through the sample fixing holes I 1-4 and the sample fixing holes II 2-4 respectively with the sample holding plate I 1-5 and the sample holding plate II 2-5 is fixed on the loading plate, and the loading rod I 1-7 and the loading rod II 2-7 are respectively fixed on the loading rod installation hole I 1-2 and the loading rod installation hole II2-2. The other ends of the loading rod I 1-7 and the loading rod II 2-7 are respectively connected to the external loading power device, and the loading rod I 1-7 and the loading rod II 2-7 are always kept on the same straight line. The start-up, loading mode, loading rate and termination operations of loading rod I 1-7 and loading rod II 2-7 are all controlled by c...

Embodiment 2

[0063] The test device includes a sample, loading plate I1 and loading plate II2. The loading plate I 1 and the loading plate II 2 are identical loading plates, and together constitute a loading fixture. The installation of the test device, the test consists of pins passing through the sample fixing holes I 1-4 and the sample fixing holes II 2-4 respectively with the sample holding plate I 1-5 and the sample holding plate II 2-5 is fixed on the loading plate, and the loading rod I 1-7 and the loading rod II 2-7 are respectively fixed on the loading rod installation hole I 1-2 and the loading rod installation hole II2-2. The other ends of the loading rod I 1-7 and the loading rod II 2-7 are respectively connected to an external loading power device, and the loading rod I1-7 and the loading rod II 2-7 are always kept on the same straight line. The start-up, loading mode, loading rate and termination operations of loading rod I 1-7 and loading rod II 2-7 are all controlled by co...

Embodiment 3

[0075] The test device includes a sample, loading plate I1 and loading plate II2. The loading plate I1 and the loading plate II 2 are identical loading plates, and together constitute a loading fixture. The installation of the test device, the test consists of pins passing through the sample fixing holes I 1-4 and the sample fixing holes II 2-4 respectively with the sample holding plate I 1-5 and the sample holding plate II 2-5 is fixed on the loading plate, and the loading rod I 1-7 and the loading rod II 2-7 are respectively fixed on the loading rod installation hole I 1-2 and the loading rod installation hole II2-2. The other ends of the loading rod I 1-7 and the loading rod II 2-7 are respectively connected to an external loading power device, and the loading rod I 1-7 and the loading rod II 2-7 are always kept on the same straight line. The start-up, loading mode, loading rate and termination operations of loading rod I 1-7 and loading rod II 2-7 are all controlled by co...

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Abstract

The invention discloses a soil body two-dimensional fracture testing method and device. In the testing method, loading clamps are combined in different forms according to different fracture testing types; the loading clamps are installed on a power loading device according to required loading angles. Loading rods are connected with the external power loading device, and starting and loading modes of the loading rods are controlled by a computer and a data acquisition system. The testing device comprises a sample, a loading plate I and a loading plate II, wherein a loading clamp is formed by the loading plate I and the loading plate II which are completely identical. Each loading plate comprises a clamp body, a loading rod installing hole, a compression-shear assisting plate, a sample fixing hole, a sample clamping plate, a pull-shear assisting plate and the corresponding loading rod, and the compression-shear assisting plates and the pull-shear assisting plates are detachable. The testing device can simultaneously achieve compression-shear type '-I-II type', shear type 'II type', pull-shear type 'I-II type' and stretching type 'I type' fracture testing.

Description

technical field [0001] The invention relates to a soil fracture test device and method, belonging to the technical field of soil fracture tests, in particular to a soil tensile type, shear type, tensile and shear composite type, and compression and shear composite type failure A test method and a test device, in particular to a soil two-dimensional fracture test method and a test device. Background technique [0002] The failure of soil due to crack propagation is one of the important reasons for the failure of many geotechnical structures. Although the problem of soil fracture failure has been generally recognized by the academic and engineering circles, the research on soil fracture failure is still insufficient, and many key scientific problems have not yet been resolved. [0003] According to the stress on the crack and the displacement mode of the crack surface, the crack is divided into three basic types: type I (opening type), type II (shear type) and type III (tear ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/08G01N3/24
CPCG01N3/08G01N3/24
Inventor 王俊杰张钧堂张慧萍梁越刘明维
Owner 重庆山渝道科技有限公司
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