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Multi-layer reinforced soil pull-out tester suitable for cold region roadbed coarse particle filler

A technique of drawing test and coarse particles, which is applied in the direction of applying stable tension/pressure to test the strength of materials, instruments, scientific instruments, etc. It can solve the problems of difficult implementation, long cycle, and difficult operation, and reduce the boundary effect The effect of size effect and strong scientific research application value

Pending Publication Date: 2021-03-30
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The on-site full-scale test is a test that is close to the actual engineering size on site. It is expensive, long-term, and difficult to implement. Compared with indoor tests, it is not easy to operate.

Method used

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  • Multi-layer reinforced soil pull-out tester suitable for cold region roadbed coarse particle filler
  • Multi-layer reinforced soil pull-out tester suitable for cold region roadbed coarse particle filler
  • Multi-layer reinforced soil pull-out tester suitable for cold region roadbed coarse particle filler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example

[0048] Taking the interface drawing test of coarse particle filler-rebar under freeze-thaw conditions as an example, the operation process of the test equipment designed by the present invention is illustrated:

[0049] 1. Calculate the amount of medium filler required according to the moisture content and relative compactness requirements, and prepare the soil layer according to the particle gradation composition. The following will take the physical and mechanical properties test of the single-layer reinforcement-soil interface with a length of 900mm as an example. If three layers are to be carried out at the same time For testing, the soil layer can be configured layer by layer.

[0050] 2. Put the filler into the model box and compact it in four layers according to the required density and sample quality. The compaction height of each layer is 200mm. .

[0051] 3. Lay the geogrid flat on the filler, which is required to be flat and parallel to the side wall. The length o...

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Abstract

The invention discloses a multi-layer reinforced soil pull-out tester suitable for cold region roadbed coarse particle filler. The multi-layer reinforced soil pull-out tester comprises a vertical loading system, a reaction frame, an adjustable loading plate, a model box, a rear baffle moving track, a high-speed camera, a low-temperature cold bath system, a worm gear case, a clamp, a strain type horizontal loading system, a control and data acquisition system, a flexible damping base, a tension sensor, a pressure sensor, a displacement sensor, a temperature sensor, and a moisture sensor. The multi-layer reinforced soil pull-out tester can systematically and scientifically restore the physical process of stress deformation of the geogrid soil interface in the cold region, accurately obtain the mechanical parameters and change rules of the reinforced soil interface under the comprehensive influence of a moisture field, a temperature field and static and dynamic loads, and has extremely high scientific research and application values.

Description

technical field [0001] The invention relates to a test device for the physical and mechanical properties of the interface between reinforcement and soil in slope engineering and subgrade engineering in cold regions, in particular to a test instrument for studying the interface characteristics of reinforcement-soil interface of reinforced geotechnical materials under the action of static and dynamic loads. Background technique [0002] Reinforced geotechnical materials have a certain application market at home and abroad, but compared with traditional building materials, there are still many gaps in the field of corresponding test specifications, which is especially obvious in China. From a domestic point of view, the existing test specifications and procedures do not study the reinforcement theory in depth, and have not formed a systematic theoretical explanation, which can no longer meet the needs of the continuous development and improvement of the reinforced soil theory an...

Claims

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Application Information

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IPC IPC(8): G01N3/18G01N3/02
CPCG01N3/18G01N3/02G01N2203/0017G01N2203/0048G01N2203/0228G01N2203/0236
Inventor 闫穆涵凌贤长唐亮田爽李善珍王柯郭宇航
Owner HARBIN INST OF TECH
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