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Freeze-thaw cycle experiment device capable of considering stress and moisture content coupling

A technology of freeze-thaw cycles and experimental devices, applied in measuring devices, force/torque/work measuring instruments, instruments, etc., can solve problems such as changes in moisture content and stress state simulation tests during freeze-thaw cycles in nature

Active Publication Date: 2021-05-04
YELLOW RIVER ENG CONSULTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a freeze-thaw cycle experimental device that can consider the coupling of stress and water content, which is used to solve the problem that the simulation test of the moisture content change and stress state in the natural freeze-thaw cycle process is not carried out in the existing freeze-thaw cycle test device. question

Method used

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  • Freeze-thaw cycle experiment device capable of considering stress and moisture content coupling
  • Freeze-thaw cycle experiment device capable of considering stress and moisture content coupling
  • Freeze-thaw cycle experiment device capable of considering stress and moisture content coupling

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Embodiment 1

[0069] The embodiment of the present invention provides a freeze-thaw cycle experimental device that can consider the coupling of stress and moisture content, such as figure 1 , figure 2 shown, includes: experiment box, also includes:

[0070] Several pressurization systems are arranged inside the test box, and test pieces 13 are arranged in the pressurization system, and each test piece 13 is fixed by a set of pressurization systems;

[0071] Vacuum electroosmosis system, including: several anode electrode plates 12 and cathode electrode plates 14, which are in one-to-one contact with the test pieces 13 in the several pressurized systems, and are used to form the inside of the test piece 13 through electrophoresis under the action of current. seepage, and then change the water content of the test piece 13 during the freeze-thaw cycle;

[0072] temperature control system, connected with the experiment box;

[0073] The data acquisition system includes several data acquisit...

Embodiment 2

[0078] On the basis of embodiment 1;

[0079] like figure 1 As shown, the experimental box includes:

[0080] The outer box 1 of the experiment box, the inner box 2 of the experiment box is arranged in the outer box 1 of the experiment box, and the insulation layer 6 is arranged between the outer box 1 of the experiment box and the inner box 2 of the experiment box;

[0081] The upper end of the outer box 1 of the experimental box is provided with an experimental box cover 4, and the upper end of the outer box 1 of the experimental box and the upper end of the inner box 2 of the experimental box is provided with a double-layer sealing ring 5 at the contact position with the cover 4 of the experimental box;

[0082] The upper surface of the test box cover 4 is provided with a test box cover handle 3 and a vacuum valve 26, and the vacuum valve 26 communicates with the inner box 2 of the test box.

[0083] The working principle and beneficial effects of the above technical sche...

Embodiment 3

[0085] On the basis of embodiment 1 or 2, such as figure 1 shown;

[0086] The pressurization system includes: an upper cover plate 8, a lower cover plate 17, a frame column 9, a circular sleeve 15, and a screw rod 37;

[0087]One end of the four frame columns 9 is fixedly connected with the inner bottom wall of the experiment box (when based on the embodiment, it is the inner bottom wall of the experiment box), and the four corners of the lower cover plate 17 are connected by bolts 7 The four corners of the upper cover plate 8 are fixedly connected to the lower parts of the four frame columns 9 respectively, and the four corners of the upper cover plate 8 are respectively fixedly connected to the upper parts of the four frame columns 9 through bolts 7;

[0088] The circular sleeve 15 is installed at the center position of the upper surface of the lower cover plate 17, and an insulating layer 11 is pasted inside the circular sleeve 15, and the test piece is placed in the circ...

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Abstract

The invention discloses a freeze-thaw cycle experiment device capable of considering stress and moisture content coupling, and the device comprises an experiment box, a plurality of pressurization systems internally equipped with test pieces, and a vacuum electroosmosis system used for forming seepage in the test piece through an electrophoresis phenomenon under the action of current so as to change the moisture content of the test piece in the freeze-thaw cycle process; a temperature control system; and a data acquisition system, which is electrically connected with the pressurization systems, the temperature control system and the vacuum electroosmosis system. The invention aims to provide the freeze-thaw cycle experiment device capable of considering stress and moisture content coupling, the pressurization systems are arranged, a traditional freezing and thawing cycle process is achieved, meanwhile, a screw rod is rotated, the screw rod drives an anode motor plate to move up and down, the stress state of a test piece in the freezing and thawing cycle process is further controlled, therefore, the stress state of the test pieces in the natural freeze-thaw cycle process is simulated, and the expansive force of the test piece in the frost heaving process is tested through a force sensor.

Description

technical field [0001] The invention relates to the field of experimental equipment in geotechnical engineering, in particular to a freeze-thaw cycle experimental device which can consider the coupling of stress and water content. Background technique [0002] my country is rich in land resources and complex geological conditions. As a typical geological condition, seasonal frozen soil accounts for about 53% of my country's land area. It is a kind of soil that freezes in winter and melts in summer. With the improvement of my country's economic strength and the advancement of science and technology, some projects will inevitably be built in seasonally frozen areas. Under the long-term dry-wet cycle and freeze-thaw cycle of seasonal frozen soil, the physical and mechanical properties of the soil will continue to change. In severe cases, it will cause problems such as uneven settlement of the foundation, muddying and cracking of the roadbed, which will bring serious problems t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/12G01L5/00
CPCG01N25/12G01L5/0028
Inventor 吴向东邓伟杰付健李禄禄于洋郭冲
Owner YELLOW RIVER ENG CONSULTING