Abrasion resistance test device capable of accurately measuring CAI value of rock and test method thereof
A test device and precise measurement technology, which is applied in the direction of measuring device, testing wear resistance, strength characteristics, etc., can solve the problems that the horizontal friction resistance cannot be measured in real time, is unstable, and cannot overcome the vertical force of the overlay
Pending Publication Date: 2022-01-21
上海隧道工程质量检测有限公司
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Problems solved by technology
[0004] 1) The horizontal friction between the steel needle and the rock sample during the scoring process makes the steel needle and its additional counterweight tend to tilt, making the overlying vertical force unable to be kept at 70N stably, thus affecting the CAI measurement value;
[0005] 2) The horizontal frictional resistance between the steel needle and the rock sample cannot be measured in real time during the marking process
[0006] However, the above improvements cannot overcome the problems that the vertical force of the overlying structure is unstable and the horizontal frictional resistance cannot be measured in real time.
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[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0026] Refer below Figure 1-3 , the present invention will be described in further detail.
[0027] As preferred but not limited, its bottom plate 11 is a 500mm*500*10mm steel plate, two small rails 13 with a length of 100mm and a spacing of 30mm are welded in the middle; a stainless steel pole 12 with a diameter of 30mm is welded on the right of the base, and a hand is installed on the left. rocker17. The hand rocker 17 is a hollow stainless steel tube with a diameter of 16 mm, which is hinged to the hand rocker hinge support 18 through a pin, and a connecting rod 15 installation hole is reserv...
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Abstract
The invention belongs to the technical field of rock mechanical property tests, and relates to an abrasion resistance test device capable of accurately measuring a rock CAI value and a corresponding test method thereof. The invention relates to an abrasion resistance test device capable of accurately measuring a CAI value of a rock. The abrasion resistance test device comprises an integral pedestal, a rock sample holder, a steel needle (3), a rock sample (41) and an additional counterweight (42) thereof. According to the invention, the 70N vertical load is accurately provided by using the rock test block and the additional weight so as to accurately measure the abrasion resistance index of the rock, and the horizontal frictional resistance of the steel needle on the surface of the rock sample can be measured.
Description
technical field [0001] The invention belongs to the technical field of rock mechanics property tests, and relates to a wear resistance test device capable of accurately measuring the CAI value of rocks and a corresponding test method. Background technique [0002] The degree of tool wear during shield excavation has a significant impact on the safety, quality and progress of tunnel construction; and the wear resistance of rock and soil is an important factor affecting tool wear. The Cerchar Abrasiveness Index test (CAI test) recommended by the International Society of Rock Mechanics and Engineering is a method generally recognized by the engineering community to measure the wear resistance of rocks. The principle is as follows: use a standard steel needle (diameter 10mm, length 100mm, 90° conical tip), under the action of a constant vertical force (70N), make it mark a standard rock sample at a specific speed (10mm / min) ( 50mm in diameter, 40mm in height) surface; remove th...
Claims
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IPC IPC(8): G01N3/56G01N3/02G01N3/04
CPCG01N3/56G01N3/02G01N3/04G01N2203/0258G01N2203/0405G01N2203/0682
Inventor 诸岧杨勇吴帆葛凌峰卞正荣关振长
Owner 上海隧道工程质量检测有限公司