Device and method for measuring shear deformation of soil under vacuum preloading
A technology of shear deformation and measuring device, applied in the direction of measuring device, using a stable shear force to test the strength of materials, instruments, etc., can solve the problem of not being able to accurately measure the shear deformation of soil, and achieve rapid consolidation. drainage effect
Active Publication Date: 2020-09-15
SHANXI PROVINCIAL RES INST OF COMM +1
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[0004] The soil shear deformation measurement device under vacuum preloading is an instrument used to measure the shear deformation of soil under vacuum preloading conditions. It has certain significance for the study of soil shear strength characteristics. The current shear deformation measurement The device and method cannot realize accurate measurement of soil shear deformation under certain vacuum preloading and drainage conditions
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[0030] Such as figure 1 As shown, a soil shear deformation measurement device under the action of vacuum preloading includes an air extractor 1, an upper annular side plate 4, a lower annular side plate 5, a water storage chamber 10, a pulley 12, a weight 13, and a vertical rod 17 and several drainage pipes 6, the upper annular side plate 4 bottom is provided with the upper soil sample chamber with the opening facing downward, the lower annular side plate 5 is provided with the lower soil sample chamber with the opening facing upward, the upper soil sample chamber and the lower soil sample chamber The chamber forms a cylinder-shaped and airtight soil sample chamber. The upper soil sample chamber and the lower soil sample chamber are symmetrically arranged to form a soil sample chamber. The soil sample chamber is used for fixing and shearing the cylindrical soil body 7 . A conduit 3 is connected between the air extractor 1 and the upper annular side plate 4. One end of the cond...
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Abstract
The invention discloses a vacuum preloading soil shear deformation measuring device and measuring method. The measuring device comprises an air exhauster, an upper annular side plate, a lower annular side plate, a water storage chamber, a pulley, a weight, a vertical rod and a plurality of water discharge pipes, a soil sample chamber is formed between the upper annular side plate and the lower annular side plate, a duct is communicated between the air exhauster and the upper annular side plate, water outlet pipe ports of the lower ends of the water discharge pipes sequentially penetrate the upper annular side plate and the lower annular side plate and are formed in the water storage chamber, the water discharge pipes are provided with a plurality of water discharge holes, a rope is connected between the upper annular side plate and the weight, the pulley is mounted on the rope, a bearing table is arranged below the weight, the rope is unstressed through the bearing table, and scales corresponding to height values measuring the weight are arranged on the vertical rod. The measuring device is simple in structure and machining process, convenient to operate, low in machining cost and easily popularized and applied in production and teaching and has a certain theoretical significance and engineering significance for research of shear strength characteristics of soil with different densities.
Description
technical field [0001] The invention relates to the technical field of geotechnical laboratory tests, in particular to a soil shear deformation measurement device and measurement method under vacuum preloading. Background technique [0002] The measurement of shear deformation of soil is the most important and direct method in the study of soil shear strength characteristics. In the prior art, there are many measuring devices for shearing deformation of soil. Generally, lateral shearing force is directly applied to the soil, and the shear strength of the soil is detected through a complex structure. Shear force is easy to damage the soil, causing soil collapse and affecting the measurement results. The traditional measurement devices and measurement methods are more complicated to operate, more cumbersome, and the measurement accuracy is not high. [0003] Vacuum preloading is to evacuate under the sealing membrane covering the soil, so that the air pressure difference betw...
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IPC IPC(8): G01N3/24
CPCG01N3/24G01N2203/0003G01N2203/0025G01N2203/0033G01N2203/0234G01N2203/0252G01N2203/0266G01N2203/0605
Inventor 员康锋展婷变吕淑芳张军王国忠刘澔
Owner SHANXI PROVINCIAL RES INST OF COMM