Apparatus and method for testing spalling strength of rock adjacent to water body
A test device and rock layer technology, which is applied in the field of test devices for rock spallation strength of adjacent water bodies, can solve the problems of measuring the rock spallation strength of adjacent water bodies, water gushing affects construction, and threatens the life safety of staff, etc., and achieves measurement results Accurate and reliable, easy to operate and simple in theory
Active Publication Date: 2020-05-29
CENT SOUTH UNIV
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Problems solved by technology
If the construction is carried out without knowing the spallation strength of the rocks in the adjacent water body, it is likely that the rocks in the adjacent water body will be damaged due to construction disturbance, which will cause the gushing of the water body to affect the construction and threaten the life safety of the workers, so the spallation of the rocks in the adjacent water body will be obtained. Strength is critical for proper construction and the safety of construction personnel, and there is currently no device for measuring the spallation strength of rocks adjacent to water bodies
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Embodiment 1
[0044] Such as figure 1 with figure 2 As shown, the present invention provides a test device for rock spallation strength adjacent to the water body 8, comprising a platform 13, an air gun 1, a punch 2, a first set of strain gauges 4, a second set of strain gauges 5, and sequentially coaxially arranged The incident rod 3, the sleeve 6, the transmission rod 10 and the axial pressure providing device 11, the platform 13 is a bed body with a certain length and a flat upper surface.
[0045] The punch 2 is set in the chamber 12 of the air gun 1, the air gun 1 and the chamber 12 are fixedly arranged on the platform 13 through the bottom bracket, and the chamber 12 is facing the end of the incident rod 3 different from the sample 7; 3. The transmission rod 10 and the axial pressure providing device 11 are also fixed on the platform 13 through the bottom support, and the bottom support below the incident rod 3 only supports it. When the incident rod 3 is impacted by the punch 2, it...
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Abstract
The invention discloses a device for testing spall strength of rock near water. The device comprises a platform, a gas gun, a punch head, a first group of strain pieces, a second group of strain pieces, and an incident bar, a sleeve, a transmission bar and an axial pressure providing device which are sequentially and coaxially arranged. The punch head is arranged in a chamber of the gas gun. The sleeve is used for accommodating a sample and water. The incident bar and the transmission bar both partially extend into the sleeve. The gas gun, the chamber, the incident bar, the transmission bar and the axial pressure providing device are fixed to the platform by collets. The first group of strain pieces and the second group of strain pieces are electrically connected with a super dynamic strain instrument. The invention also provides a method for testing spall strength of rock near water by utilizing the device. A pressure is applied to water so that an axial pressure can be applied to a sample by the water, thereby achieving simulation study on the spall condition of the rock near water under true circumstances; thus, the testing result can better conform to the reality; the environment where a target is located is restored to an utmost extent, and the measurement result is accurate and reliable.
Description
technical field [0001] The invention relates to the technical field of spallation strength testing, in particular to a device and method for testing the spallation strength of adjacent water rocks. Background technique [0002] The prototype of the Hopkinson rod device was proposed by Hopkinson in 1914. According to whether there is a transmission rod, it is divided into a free Hopkinson compression rod and a separated Hopkinson compression rod. For the dynamic mechanical properties of materials The test primarily utilizes split Hopkinson struts. [0003] Existing spalling strength test devices are roughly divided into two categories, one is a test device without equipment for providing confining pressure and axial pressure, and the other is a test device that provides confining pressure. Both types of devices connect the test piece directly to the transmission rod. [0004] However, during the construction of more and more projects, adjacent water bodies such as water tra...
Claims
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IPC IPC(8): G01N3/307G01N3/06
CPCG01N3/068G01N3/307G01N2203/0044G01N2203/0067G01N2203/0641G01N2203/0676
Inventor 刘敦文褚夫蛟陶明张江山彭怀德杨光马静刘宏章
Owner CENT SOUTH UNIV