Soil pressure tester with flexible testing surface
A flexible test and tester technology, which is applied in the direction of measuring fluid pressure, measuring fluid pressure through electromagnetic components, measuring fluid pressure through mechanical components, etc., can solve problems affecting the accuracy of earth pressure values, etc., and achieve reliable performance and convenient manufacture. Effect
Inactive Publication Date: 2009-10-21
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology
However, since the surface of the earth pressure cell is generally made of high rigidity materials such as stainless steel, when the soil deforms, the surface of the earth pressure cell forms an arch effect, which greatly affects the accuracy of the measured earth pressure value
If the pressure surface of the earth pressure test equipment is replaced by flexible materials, the accuracy of the earth pressure test can be improved, which is very beneficial to the interpretation of engineering control and scientific test data. There is still no such device
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[0011] refer to figure 1 , figure 2 and image 3 , the outer casing is made of polymer material ring 2 as a sealing body, and the pressure-receiving surface of polymer material ring 2 is provided with a strong and elastic rubber film 1, and the polymer material ring 2 and rubber film 1 are made of a seal body, under the rubber membrane 1 in the ring 2 of the polymer material, there is a bracket 7 made of stainless steel with a hole 8, the bracket 7 has a conductive function, the bracket 7 has a small arc or keeps a certain distance from the rubber membrane 1, so that the rubber When the film 1 is not under stress, it remains separated from the support 7, and the metal contact 4 is pasted on the rubber film 1, and the metal contact 4 transmits the electrical signal to the outside of the tester through the wire through the cable 3; the polymer material ring 2 is equipped with Inflatable port 5 and high-precision air pressure sensor 6.
[0012] refer to figure 1 , figure 2...
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The invention discloses a soil pressure tester with a flexible testing surface. A compression surface of a shell is provided with an elastic testing surface, and the shell and the elastic testing surface are made into a sealing body; the shell is internally provided with a bracket (7) which is provided with a hole (8) and corresponding to the elastic testing surface, and a certain distance is kept between the bracket (7) and the elastic testing surface, so that the elastic testing surface is separated from the bracket (7) when being not stressed; the elastic testing surface is stuck with a metal contact (4) which transmits electrical signals outside the tester through a cable (3) by a lead; the shell is provided with a charging hole (5) and a high-accuracy gas pressure sensor (6). The soil pressure tester with the flexible testing surface is used for testing the soil pressure, and has the advantages of high accuracy, simple structure, convenient fabrication and reliable performance.
Description
technical field [0001] The patent of the present invention relates to a test device that can be placed inside the soil to accurately measure the earth pressure, especially a new device that can automatically adapt to the stiffness conditions of the bulk material to be tested and prevent the soil arch effect from affecting the test results. Background technique [0002] At present, in order to ensure the safety of soil retaining structures, it is often required to measure the earth pressure acting on the structure, or to accurately measure the state of earth pressure inside the soil during scientific research. The measurement method widely used at this stage is to embed the earth pressure cell on the structure or in the soil, and then use a reading instrument to read the earth pressure data. However, since the surface of the earth pressure cell is generally made of high rigidity materials such as stainless steel, when the soil deforms, the surface of the earth pressure cell f...
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IPC IPC(8): G01L7/00G01L9/00
Inventor 贺炜王泓华
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY