Vacuum consolidation test device for unit soil samples in triaxial state
A technology of consolidation test and unit soil, applied in measuring device, using stable tension/pressure test material strength, instrument, etc., can solve the problems of inability to monitor and observe, difference, etc., and achieve a high degree of automation and easy operation. Effect
Active Publication Date: 2018-03-20
WENZHOU UNIV
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The actual situation of the soil sample is also different, which causes a large difference between the experimental research results and the actual measurement results.
At the same time, many parameters cannot be monitored and observed
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[0010] The accompanying drawings show the technical solution of the present invention and its embodiments, and the relevant details and working principles of the embodiments will be further described below in conjunction with the accompanying drawings.
[0011] refer to figure 1 , figure 2 As shown, the vacuum consolidation test device for unit soil samples under the triaxial state provided by the present invention includes a base 1, a main shaft 2 and a top cover 3. In order to improve the accuracy of the test, the base 1 is provided with a vial 4, The four corners of the base 1 are provided with a horizontal position screw adjuster 5, through the level bubble 4 to observe whether the base 1 is in a horizontal position, the base 1 can be adjusted to a horizontal position by adjusting the screw adjuster 5, and the base 1 and the top cover 3 are provided There is an outer cylinder 6, and liquid is injected into the outer cylinder 6, and the joint between the base 1 and the to...
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The invention discloses a vacuum consolidation test device of a unit soil sample under the triaxial state. Liquid is injected to an outer cylinder; a confining pressure sensor is arranged in a chamber between the outer cylinder and an inner cylinder; the matching positions between a base and the outer cylinder and between a top cover and the outer cylinder are in liquid seal; the inner cylinder is arranged in the outer cylinder; a soil sample is arranged in the inner cylinder; a pore water pressure sensor is arranged on the soil sample; an exhaust water pipe is arranged in the soil sample; a through hole is formed in the side surface of the exhaust water pipe; the lower end of the inner cylinder is provided with an outer cylinder substrate; the upper end of the inner cylinder is provided with a piston plate; the piston plate is connected with a lifting shaft; the lifting shaft upwardly penetrates through the top cover; the upper end of the lifting shaft is provided with a pressure plate; the upper end of a main shaft is provided with a settlement gauge; a pressurizing hole is connected with a pressurizing device; the upper end of the exhaust water pipe is connected with a vacuumizing device through a vacuumizing pipeline; the base is provided with a water inlet pipeline conducted by an exhaust water plate; the water inlet pipeline is connected with the water inlet hole which is at the outer side; and the water inlet pipeline is provided with a water inlet pressure sensor. The test device disclosed by the invention can complete a soil sample pore water pressure change test under vacuum preloading, a soil sample settlement test and various testes under a pile loading condition. The test device disclosed by the invention can also be used for an exhaust water plate discharge capacity test experiment.
Description
technical field [0001] The invention relates to a vacuum consolidation test device for a unit soil sample in a triaxial state, in particular to a test study on the void water pressure of a soil sample when a circular drainage pipe is used under a fixed vacuum degree. . Background technique [0002] Before the present invention, the vacuum consolidation test device for unit soil samples under the triaxial state was very immature, and the test device only included three parts: vacuum pressure system, confining pressure pore pressure monitoring system and settlement monitoring. Most of the indoor soil unit model tests are mainly carried out on equipment such as dynamic triaxial instruments and hollow cylinder torsion instruments. The research objects of these tests are all soil samples. By analyzing the characteristics of the soil sample unit in the test environment, the mechanical properties and deformation laws under vacuum preloading are indirectly studied. This kind of te...
Claims
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IPC IPC(8): G01N3/12
CPCG01N3/12G01N2203/0019G01N2203/0042
Inventor 王鹏马建军王军张丙钦腾凌飞
Owner WENZHOU UNIV