A Salt Frost Heave Tester Realizing Hydrothermal Coupling Effect

A technology of thermal-mechanical coupling and tester, which is applied in the field of geotechnical engineering, can solve the problems that it is difficult to realize the coupling of water, heat and force at the same time, and achieve the effects of accurate and reliable experimental results, exquisite structure and convenient operation

Active Publication Date: 2020-11-17
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The generation and change of salt frost heaving deformation and salt frost heaving force of saline soil are affected by factors such as water, heat, and force. It is difficult to realize the coupling of water, heat, and force at the same time with existing test equipment

Method used

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  • A Salt Frost Heave Tester Realizing Hydrothermal Coupling Effect
  • A Salt Frost Heave Tester Realizing Hydrothermal Coupling Effect
  • A Salt Frost Heave Tester Realizing Hydrothermal Coupling Effect

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as Figure 1 to Figure 5As shown, this embodiment includes an assembly and a loading system. The assembly includes a vertically placed sample cylinder, an upper cold plate 1 and a lower cold plate 2, and the upper cold plate 1 is movably placed on the upper end of the sample cylinder. The lower cold plate 2 is fixedly connected to the lower end of the sample tube; the sample tube includes a plurality of stacked tubes 3 with open upper and lower ends and a bottom tube 4 with open upper and lower ends, and the stacked tubes 3 are screwed in turn, and finally The stacking tube 3 at the lower end is threadedly connected to the bottom tube 4; the upper cold plate 1 and the inner wall of the stacking tube 3 at the uppermost end of the sample tube are attached and moved, and the lower cold plate 2 is fixedly connected with the outer wall of the bottom tube 4 with threads. A plurality of cylinder wall holes are evenly opened on the peripheral side of the stacking cylinder ...

Embodiment 2

[0047] Such as Figure 1 to Figure 4 As shown, this embodiment includes an assembly and a loading system. The assembly includes a vertically placed sample cylinder, an upper cold plate 1 and a lower cold plate 2, and the upper cold plate 1 is movably placed on the upper end of the sample cylinder. The lower cold plate 2 is fixedly connected to the lower end of the sample tube; the sample tube includes a plurality of stacked tubes 3 with open upper and lower ends and a bottom tube 4 with open upper and lower ends, and the stacked tubes 3 are screwed in turn, and finally The stacking tube 3 at the lower end is threadedly connected to the bottom tube 4; the upper cold plate 1 and the inner wall of the stacking tube 3 at the uppermost end of the sample tube are attached and moved, and the lower cold plate 2 is fixedly connected with the outer wall of the bottom tube 4 with threads. A plurality of cylinder wall holes are evenly opened on the peripheral side of the stacking cylinder...

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Abstract

The invention provides a salt frost-heaving tester capable of realizing water-heat-stress coupling effect. The tester comprises an assembling body and a loading system; the assembling body comprises asample tube, an upper cooling plate ad a lower cooling plate; the sample tube comprises superposition tubes in threaded connection in order, and a bottom tube arranged below the superposition tubes;multiple tube wall holes are uniformly formed in the circumferences of the superposition tubes; the tube wall holes are connected with end covers; rubber plugs are arranged on the end covers; multiletube wall holes are arranged at the circumference of the bottom tube, drainage nozzles are arranged on the tube wall holes; each of the upper cooling plate and the lower cooling plate comprises a cooling plate upper cover and a cooling plate base connected through bolts; and the loading system is a lever system or a stress sensor system. A coupling effect of water, heat, stress and like elements can be realized, the tube body adopts the sectional arrangement, the sample size can be controlled as required, the structure is delicate, the design is reasonable, and a testing result is accurate.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, and in particular relates to a salt frost heaving tester which realizes hydrothermal coupling effect. Background technique [0002] Saline soil is widely distributed in my country, and it is estimated that the distribution area is about 200,000 square kilometers, accounting for about 2.1% of the total land area, and sulfate saline soil is one of the most important saline soils in my country. Compared with ordinary soil, sulfate saline soil has the characteristics of salt dissolution, salt expansion and corrosion. Especially in the Northwest seasonally frozen soil area, sulfate saline soil not only has salt expansion, but also frost heaving, which leads to serious damage to buildings. Bulging and cracking diseases, roads, airports, housing construction, oil and gas pipelines, power transmission tower foundations, ditches and other projects in Xinjiang, Gansu, Ningxia, Inner Mongol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D21/02
Inventor 周凤玺应赛文桃马强柳鸿博叶泽国陈浩王立业梁玉旺周立增刘世杰
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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