Constant-pressure self-circulation frost heaving test system

A frost heave test and self-circulation technology, applied in the direction of material thermal expansion coefficient, etc., can solve problems such as inability to use test simulation, long test period, and test result influence.

Pending Publication Date: 2018-04-13
SHANDONG AGRICULTURAL UNIVERSITY
View PDF0 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The type of frost heaving test machine in the standard of soil engineering test methods (GB/T 50123-1999) is widely used in the determination of soil frost heave due to its simple structure, but this type of test machine also has obvious deficiencies. That is to say, the water supply system is a closed plastic pipe with a certain height. During the test, the water pressure will change with the change of the water level, which will i

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Constant-pressure self-circulation frost heaving test system
  • Constant-pressure self-circulation frost heaving test system
  • Constant-pressure self-circulation frost heaving test system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] refer to Figure 1 to Figure 3 , the constant pressure self-circulation frost heave test system includes a frost heave test subsystem and a water pressure control subsystem. The frost heaving test sub-system includes a test box 4 with thermal insulation material, and also includes a controller module 1, which is arranged outside the test box 4 and installed together with the test box 4. The controller module 1 is provided with buttons and a display device 2 .

[0020] A vertically arranged columnar transparent sample box 11 (square column or cylindrical shape) is arranged in the test box body 4 , and an insulating material 9 is arranged outside the sample box 11 . The top surface of the sample box 11 can move up and down, and the bottom surface of the sample box 11 is a backing plate 14 with holes with a certain thickness. A soil sample is placed in the sample box 11, and a layer of wet filter paper is laid on the top and bottom of the soil sample. The test chamber 4...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a constant pressure self-circulation frost heave test system, which includes a frost heave test subsystem and a water pressure control subsystem. The frost heave test subsystem includes a test box and a controller module. The test box is also equipped with a temperature detection device, a refrigeration device, a displacement detection device and a pressure device; a base is arranged in the test box, and a water retention pool is arranged on the base, and the sample box is placed in the water retention pool. The bottom surface of the base is a perforated backing plate with a certain thickness; the water pressure control subsystem includes a water storage tank and an active water delivery device. A drain is provided, and the water in the water retention tank beyond a certain position is discharged from the drain. The invention can not only simulate the deformation test of plain soil and saline soil in a low temperature environment in the laboratory, but also ensure the constant water pressure and the recycling of test water in the test process.

Description

technical field [0001] The invention belongs to the technical field of soil testing, in particular to a constant pressure self-circulation frost heaving test system. Background technique [0002] Soil heave and salt heave are volume expansion phenomena caused by water ice formation and salt crystal precipitation in soil. Engineering structures in permafrost and saline soil areas will be damaged due to frost heaving and salt heaving of the soil. Therefore, it is imperative to conduct in-depth research on the mechanism of soil frost heaving and salt heaving. [0003] The type of frost heaving test machine in the standard of soil engineering test methods (GB / T 50123-1999) is widely used in the determination of soil frost heave due to its simple structure, but this type of test machine also has obvious deficiencies. That is to say, the water supply system is a closed plastic pipe with a certain height. During the test, the water pressure will change with the change of the wate...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01N25/16
CPCG01N25/16
Inventor 邱秀梅卞汉兵孙兆辉
Owner SHANDONG AGRICULTURAL UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap