An indoor soil negative pressure consolidation device
A negative pressure and soil technology, applied in the direction of measuring devices, using stable tension/pressure to test material strength, suspension and porous material analysis, etc., can solve the problem of large measurement errors, dehydration and drying, and affecting soil sample settlement Changes and other issues, to achieve accurate measurement results, accurate overall deformation effect
Active Publication Date: 2022-04-12
WEIFANG UNIVERSITY
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Problems solved by technology
[0005] The disadvantage of the existing consolidation instrument is that: during the vacuum consolidation process of the soil sample, due to the vaporization of water in the soil sample, the upper part of the soil sample will quickly lose water and become dry, and become an unsaturated state, which will affect the The settlement change of the soil sample has a large measurement error
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[0027] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0028] refer to figure 1 , figure 2 , image 3, In one embodiment of the present invention, the indoor soil negative pressure consolidation device includes a frame 1 on which a cylinder 2 with an open upper end is installed. The frame 1 includes a base 101 and two left and right columns 102 connected to the base 101 . A bracket 103 is arranged inside the two columns 102 . A lower permeable stone 3 , an upper permeable stone 4 , and a suction hood 5 are sequentially installed in the inner cavity of the cylinder body 2 from bottom to top, and a space for placing soil samples is provided between the lower permeable stone 3 and the upper permeable stone 4 . The top of th...
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The invention discloses an indoor soil negative pressure consolidation device, which belongs to the technical field of soil sample measurement and analysis. The invention comprises a frame, on which a cylinder body is installed, and a lower permeable stone, an upper permeable stone, and an air suction cover are installed in the cylinder body, and the air extraction cover is connected with a tracking rod, and an air extraction channel is arranged in the tracking rod, and the air extraction channel is installed on the frame There is a tracking rod vertical displacement measuring device, and a sealing cover is installed at the opening of the cylinder. The cylinder wall of the cylinder has a three-layer structure and an inner ring cavity and an outer ring cavity are formed between the three layers. The inner wall of the cylinder body is provided with a first Through holes, a second through hole is provided between the inner ring cavity and the outer ring cavity, and a third through hole is provided on the tracking rod. The first through hole, the second through hole, and the third through hole are sequentially raised and higher than In the gas hood, a connecting pipe is arranged between the air extraction channel and the outer ring cavity, and an air extraction port is arranged on the outer wall of the cylinder body. The invention can be used for vacuum negative pressure consolidation test and penetration test, and can keep the soil sample in a saturated state during the vacuum negative pressure consolidation test, and can measure the overall deformation of the soil sample.
Description
technical field [0001] The invention relates to an indoor soil negative pressure consolidation device, which belongs to the technical field of soil sample measurement and analysis. Background technique [0002] The soil consolidation tester is a testing instrument used to measure the compression properties of soil samples under different test conditions (such as vacuuming, applying pressure, etc.). [0003] refer to Figure 8 , an existing soil consolidation instrument includes a base 101, on which a cylinder 2 with an upper end opening is installed, and in the cylinder 2, a lower permeable stone 3, an upper permeable stone 4, an air extraction Cover 5, the middle part of the exhaust cover 5 is connected with a vertical tracking rod 6, the upper end of the tracking rod 6 stretches out of the cylinder 2, the lower side of the exhaust cover 5 is provided with an air collection chamber 37, and the tracking rod 6 is Hollow structure, the inner cavity of the tracking rod 6 commu...
Claims
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IPC IPC(8): G01N3/12G01N15/08
CPCG01N3/12G01N15/088
Inventor 曹玉鹏曹君利秦风梅徐桂中李志强邢国起
Owner WEIFANG UNIVERSITY