Soft rock strength test needle penetration instrument and use method thereof

A technology of strength testing and penetrometer, which is applied in the direction of applying repeated force/pulsation force to test the strength of materials, can solve the problems of difficulty in ensuring that the penetrating needle is vertical to the rock surface, low accuracy of manual reading, and high consumption of penetrating needles. Achieve the effects of increased test success rate, convenient data collection, and improved leveling performance

Pending Publication Date: 2019-05-03
YANGZHOU UNIV
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that traditional needle penetrometers have a low degree of force control by using artificial loading, and it is difficult to ensure that the penetrating needle is vertical to the rock surface. low-level deficiencies

Method used

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  • Soft rock strength test needle penetration instrument and use method thereof
  • Soft rock strength test needle penetration instrument and use method thereof
  • Soft rock strength test needle penetration instrument and use method thereof

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with accompanying drawing:

[0027] like Figure 1-5 As shown, a needle penetrometer for testing soft rock strength includes a controller connected outside the test needle penetrometer;

[0028] like figure 2 , Figure 5 As shown, a soft rock strength test needle penetrometer, the needle penetrometer 1 consists of a rear cover 1-1, an electromagnetic coil 1-2, a penetration rod 1-3, a core hammer 1-4, and a casing 1-5 , collet mechanism 1-10, penetrating needle 1-9 and protective cap 1-8; inside the shell 1-5, there are fixed upper fixing grooves 1-16 and middle fixing grooves 1-13 sequentially from top to bottom and the bottom fixing groove 1-11, the penetration rod 1-3 is slidably set in the upper fixing groove 1-16, the middle fixing groove 1-13 and the bottom fixing groove 1-11, and the piercing hammer 1-4 is set with the penetration rod 1 Above -3, the middle part of the penetrating rod 1-3 i...

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Abstract

The invention, which belongs to the technical field of geotechnical engineering detection, provides a soft rock strength test needle penetration instrument and a use method thereof. The soft rock strength test needle penetration instrument comprises a needle penetration instrument body, a connection buckle and a tripod that are connected. An electromagnetic coil is electrified; a center penetration hammer moves upward under the effect of the electromagnetic field to accumulate potential energy; after power interruption, the center penetration hammer makes free falling body movement and the potential energy is converted into kinetic energy, so that the penetration needle is hammered to apply pressures on the soft rock; and the falling distance of the center penetration hammer is controlledbased on the currents and thus the instrument can reach balancing every time in force applying. With a tripod leveling instrument, circular leveling bubble observation is carried out, so that the leveling performance of the instrument in operation is improved; the experimental success rate is further increased; a pressure sensor and a displacement sensor are used for replacing the manual countingmethod of the traditional penetration instrument, so that the result accuracy is improved; with an external device, the hammer number of times of the center penetration hammer is controlled and data are read; and the intelligent degree is increased and data are collected conveniently and precisely.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering detection, and relates to a rock-soil strength testing instrument and a using method thereof, in particular to a soft rock strength testing needle penetrator and a using method thereof. Background technique [0002] Uniaxial compressive strength is the most used property for rock mass classification and rock mass characterization, and it is also an important parameter in different calculation and design methods in geotechnical engineering. Usually, the uniaxial compressive strength of rock mass is tested by making standard rock sample specimens and measured by related large-scale instruments and equipment. However, it is difficult to make standard rock samples for soft rocks with a high degree of weathering and incomplete diagenesis. Difficult to conduct follow-up experiments. The International Society of Rock Mechanics (ISRM) recommends using a needle penetrometer produced in Ja...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/38
Inventor 李志刚姚和康代云云高洲顾月
Owner YANGZHOU UNIV
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