Core sample sealing device in true triaxial test

A sealing device and true triaxial technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of rock sample stress concentration, etc., and achieve the effect of easy installation, solving the problem of rock sample stress concentration, and simple operation

Inactive Publication Date: 2009-08-05
INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned defects in the packaging of rock samples in existing rock true triaxial samples, the purpose of the present invention is to provide a sealing device for rock sampl

Method used

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  • Core sample sealing device in true triaxial test
  • Core sample sealing device in true triaxial test
  • Core sample sealing device in true triaxial test

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[0018] The present invention will be further explained below in conjunction with the drawings:

[0019] A sealing device for rock samples in true triaxial test, the device includes pressure cushion blocks 1-1, 1-2, 1-3, 1-4, and sealing rubber strips 2-1, 2-2, 2-3 , 2-, silica gel coating 3, rock sample 4, anti-friction gasket 5-1, 5-2, 5-3, 5-4, the connection relationship is: according to figure 1 , 2 , 3, four pressure-bearing cushion blocks 1-1, 1-2, 1-3, 1-4 are respectively placed on the four ends of the rock sample 4. Each pressure-bearing cushion block 1-1, 1 One end of -2, 1-3, 1-4 is aligned with sample 4 and connected end to end to form an interlocking type. Each bearing block 1-1, 1-2, 1-3, 1-4 has a groove on one side close to the end of the rock sample 4, and a sealing rubber strip 2-1, 2-2, 2-3 , 2-4 is placed in it, and the sealing rubber strips 2-1, 2-2, 2-3, 2-4 are slightly longer than the groove. Between the four ends of sample 4 and the four pressure cushion ...

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Abstract

The invention discloses a sealing device of a rock sample in a true triaxial test, which comprises bearing cushion blocks, sealing rubber bars, silica gel coating, a rock sample and antifriction gaskets, wherein the four bearing cushion blocks are respectively sequentially arranged on four end parts of the rock sample, which are performed rigid load in two directions, and one end of each bearing cushion block is in alignment with the rock sample in a mutually buckled way; the bearing cushion blocks and the end parts of the rock sample are provided with the antifriction gaskets, each antifriction gasket consist of a polyfluortetraethylene sheet, a red copper sheet and solid antifriction material such as graphite or zirconia, and the like, one side of the red copper sheet is stuck to the end part of the rock sample; and the rest two end parts of the rock sample, which are to be performed flexible load are coated with organic silicon gel and are covered by the bearing cushion blocks, and a sealed integer is formed by the rock sample dried in a oven and the bearing cushion blocks. The sealing device has simple structure and simple and convenient operation, is adapted to the two-rigidity one-flexibility load method of the mogi type and true triaxial type and solves the problem of stress concentration of the rock sample caused by blank corners.

Description

technical field [0001] The invention relates to the technical field of rock true triaxial testing, and more specifically, the invention relates to a rock sample sealing device in true triaxial testing, which is suitable for rock true triaxial testing. Background technique [0002] The rock true triaxial testing system (True triaxial testing system: TTS) can simulate the mechanical properties of rock under the condition of unequal triaxial stress. Compared with the conventional triaxial test, the true triaxial test can better explain the mechanical behavior of the rock under the natural stress state. [0003] Most of the rock samples for true triaxial tests are cuboids (or cubes) with six sides and can be subjected to uniform loads of different sizes in three orthogonal directions. According to the type of load, the true triaxial testing machine can be divided into rigid loading type, flexible loading type and mixed loading type. Among them, the mixed loading structure of Mo...

Claims

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Application Information

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IPC IPC(8): G01N3/02
Inventor 李小春石露冯夏庭
Owner INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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