Multifunctional true triaxial rock drilling test system and test method for characterizing the characteristics of rocks

A testing system, true triaxial technology, applied in soil material testing, strength properties, testing material strength using stable tension/pressure, etc., can solve the problem of hard rock and soil layers that cannot consider the influence of three-dimensional stress on the drilling process. Difficult to drill, single factors affecting drilling, etc.

Active Publication Date: 2016-09-14
SHANDONG UNIV
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Problems solved by technology

[0004] 1. The existing drilling device is static penetration testing, and the probe penetration method is a direct press-in type, which can directly drill for silt, sandy soil and soft rock, but it is difficu

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  • Multifunctional true triaxial rock drilling test system and test method for characterizing the characteristics of rocks
  • Multifunctional true triaxial rock drilling test system and test method for characterizing the characteristics of rocks
  • Multifunctional true triaxial rock drilling test system and test method for characterizing the characteristics of rocks

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Embodiment Construction

[0133] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0134] The true triaxial rock drilling tester includes a support frame with a reaction frame on the top, a test piece platform 11 for placing the test piece is set in the support frame, and a surrounding rock loading device is set around the test piece platform 11. The bottom of the piece platform 11 is provided with an axial pressure loading device that can contact the upper part of the test piece with the reaction force frame, and a liftable and rotatable drill 13 is set on the top of the reaction force frame 9. The drilling tester also includes a test piece for measuring A sensor for drilling parameters and a monitoring control system connected with the sensor.

[0135] The sensors include an axial displacement sensor 34 located at the bottom of the test piece platform, a dri...

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Abstract

The invention discloses a multifunctional true triaxial rock drilling test system and a test method for characterizing the characteristics of rocks. According to the method, a test piece is drilled for several times to obtain different rock cores, then the rock cores are subjected to single axial tests and triaxial tests so as to obtain a plurality of sets of mechanical property parameters; then a true triaxial rock drilling tester that can directly measure the parameters while drilling is used to obtain a plurality of sets of parameters while drilling; a mathematical relationship between the mechanical property parameters and the parameters while drilling can be established, and thus the mechanical property parameters can be obtained only through measuring the parameters while drilling of rocks according to the mathematical relationship. According to the method, a multifunctional true triaxial rock drilling tester is taken as the preset test apparatus; the tester can perform true triaxial loading on a test piece and is capable of simulating the drilling process when a test piece is pressed from three directions in underground engineering; the relationship between the parameters while drilling and mechanical characteristics of rocks under different pressures on a test piece can be established, and the test method comprises specific steps from sample preparation to data processing.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering investigation, in particular to a multifunctional true triaxial rock drilling test system and a test method for characterizing rock mass characteristics. Background technique [0002] With the rapid development of the economy and the continuous progress of human society, the rapid development of infrastructure construction, when building tunnels, subways or roadways, it is necessary to support the tunnels, subways or roadways to ensure the stability of underground projects and prevent accidents. However, the support form and support strength of underground engineering need to be determined according to the mechanical properties of the surrounding rock of the underground engineering. At present, the acquisition of the mechanical property indicators of the surrounding rock still adopts the method of drilling cores on site and performing rock mechanics tests on the cores in the labora...

Claims

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Application Information

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IPC IPC(8): G01N3/10G01N3/18G01N3/06G01N33/24
CPCG01N3/06G01N3/10G01N3/18G01N33/24G01N2203/0019G01N2203/0048
Inventor 王琦李术才王雷高松江贝潘锐孙会彬秦乾于恒昌高红科许英东胥洪彬栾英成常涛
Owner SHANDONG UNIV
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