A field coring device and method for rock true triaxial test

A coring device and true three-axis technology, applied in the field of rock equipment, can solve the problems of reducing construction line, increasing energy release rate, economic property loss, etc. Effect

Inactive Publication Date: 2016-03-02
SHANDONG UNIV
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  • Description
  • Claims
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Problems solved by technology

In addition, the excavation of surrounding caverns may cause the intensification of stress concentration in the surrounding rock of the excavated caverns, resulting in a sharp increase in the energy release rate of the surrounding rocks in the excavated caverns after a period of excavation, resulting in rockbursts, resulting in Therefore, it is of great research significance to fully understand the true triaxial mechanical properties of rocks to ensure the safety of tunnel construction and reduce the construction line
[0004] At present, the research on true triaxial test is still immature, and it is extremely difficult to take the coring of square specimens on site. The traditional coring device is too heavy, the cost of coring is high, and the sampling operation is cumbersome, which is difficult to meet the use of true triaxial test. Require

Method used

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  • A field coring device and method for rock true triaxial test
  • A field coring device and method for rock true triaxial test
  • A field coring device and method for rock true triaxial test

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Embodiment 1

[0029] Embodiment 1: a kind of on-the-spot coring device for rock true triaxial test, its structure is as Figure 1-3 Shown: including fixed frame 1, cutting cylinder wall 10, coring cylinder 12, power system and chain type cutting system, power system is set on the fixed frame 1, chain type cutting system is set on the core tube 12, fixed frame 1 The bottom end is connected with the cutting cylinder wall 10 and then placed on the core cylinder 12. The power system transmits the power to the chain cutting system to realize the cutting of the rock by the chain cutting system.

[0030] The power system includes an engine 2 arranged on the top of the fixed frame 1, the engine shaft is connected with the disc gear 3, the disc gear 3 meshes with the orthogonal gear 7 on the orthogonal gear shaft 4, and the orthogonal gear shaft 4 Located in the middle of the fixed frame 1; the disc gear 3 is also fixedly connected with the driving chain gear 6.

[0031] The orthogonal gears 7 are ...

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Abstract

The invention relates to an on-site coring device and method for a rock true triaxial test. The on-site coring device comprises a fixed framework, a cutting cylinder wall, a coring cylinder, a power system and a chain type cutting system, wherein the power system is arranged on the fixed framework, the chain type cutting system is arranged on the coring cylinder, the bottom end of the fixed framework is connected with the cutting cylinder wall and then is arranged on the coring cylinder, and the power system transfers power to the chain type cutting system, thus cutting rocks by the chain type cutting system. The device is simple in structure, convenient to disassemble, and easy to core in field, thus having extremely high popularization values.

Description

technical field [0001] The invention relates to the field of rock equipment, in particular to an on-site coring device and method for rock true triaxial tests. Background technique [0002] The true triaxial test is a triaxial compression test in which the rock specimen is placed in a stress combination state where the three principal stresses are unequal (ie σ1>σ2>σ3). True triaxial test can study the effect of intermediate principal stress (σ2) on rock deformation and strength characteristics. [0003] For tunnel construction, under the condition of high ground stress, the surrounding rock of underground engineering is in a three-dimensional stress state before excavation, and the principal stress in one or two directions is very high. After excavation, the surrounding rock changes from a three-dimensional stress state to a two-dimensional stress state. In the state of stress, when the rock is relatively brittle, it is possible to produce a sharp release of energy, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/04
Inventor 王庆瀚刘洪亮张乾青李术才李利平张骞徐飞王健华
Owner SHANDONG UNIV
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