A test device and test method for observing the evolution process of freeze-thaw damage of rock blocks
A technology of damage evolution and test equipment, which is applied in the direction of soil material testing, material inspection products, etc., can solve the problem of inability to objectively and truly reflect the evolution process of natural rock blocks, and the inability to consider the impact of initial damage such as pores and micro-cracks of natural rock blocks, Lack of actual measurement data support and other issues, to achieve the effects of strong practicability, simple device fabrication, and high temperature control accuracy
Active Publication Date: 2021-11-09
NORTHWEST INST OF ECO ENVIRONMENT & RESOURCES CAS
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Problems solved by technology
However, the freeze-thaw test of prefabricated cracks cannot objectively and truly reflect the evolution process of the initial defect damage of natural rock blocks; the influence of initial damage such as pores and micro-cracks inside natural rock blocks cannot be considered in numerical simulation and theoretical models, and there are certain limitations. sex
Therefore, the existing theories and technical means lack the support of measured data on the evolution process of rock crack freeze-thaw damage under different freeze-thaw cycles and different external temperatures.
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[0042] like Figure 1~7 As shown, a test device for observing the evolution process of freeze-thaw damage of rock blocks, the device includes a freeze-thaw cycle box 1 with casters 5, a control panel 9, a water tank 10, a compressor unit 14, a power distribution system 17 and a scanning system 20 .
[0043] The freeze-thaw cycle box 1 is composed of a base front panel 31, a base rear panel 32, a base bottom plate 33, a base side plate 34 without a cover cuboid base and a box door 2, a closed observation room side plate 25, a closed Observation room partition 26, closed observation room top plate 27, closed observation room rear panel 28, closed observation room bottom plate 29 form the closed observation room assembled; base top is provided with closed observation room, and one side of this closed observation room There is a box door 2; a power distribution system 17 is arranged in the base, and a base partition 30 is arranged above the power distribution system 17; a compres...
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Abstract
The invention relates to a test device for observing the freeze-thaw damage evolution process of a rock block. The device comprises a freeze-thaw cycle box, a control panel, a water tank, a compressor unit, a power distribution system and a scanning system. The freeze-thaw cycle box is assembled from a base and a closed observation room; a power distribution system is installed in the base, and a base partition is arranged above the power distribution system; a compressor unit is installed on the base partition, and the compressor unit is connected with a Freon circulation pipe; The freon circulation pipe extends into the closed observation room; a fan is installed near the rear of the closed observation room; a scanning system is installed in the center of the roof of the closed observation room; a temperature probe is installed at the front of the closed observation room roof; The water inlet pipe is set at the back of the tank; the water outlet is set at the bottom of the tank, and the water outlet is connected with a spray system; the freeze-thaw cycle box is equipped with a control panel, which is connected with the temperature probe, spray system, fan and compressor unit respectively; the control panel , fans and compressor units are connected to the power distribution system respectively. The invention is simple, accurate and practical.
Description
technical field [0001] The invention relates to the technical field of rock and soil mechanics tests, in particular to a test device and a test method for observing the evolution process of freeze-thaw damage of rock blocks. Background technique [0002] my country has a vast area of cold regions. Under the special and complex natural environment and geological conditions in the cold regions, freeze-thaw damage to rock blocks is common. Especially, highway projects and railway projects that pass through the high-altitude areas of the Qinghai-Tibet Plateau are facing severe freezing conditions. Financial disaster test. The damage and deterioration of rock blocks in cold regions under repeated freeze-thaw action will cause a series of engineering geological problems, such as freeze-thaw denudation and landslides of rock slopes, frost heave cracking and instability of rock blocks in tunnels, etc. The safety, stability and durability of rock mass engineering have all put forwa...
Claims
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IPC IPC(8): G01N33/24
CPCG01N33/24
Inventor 鞠鑫牛富俊刘明浩张亮
Owner NORTHWEST INST OF ECO ENVIRONMENT & RESOURCES CAS