Large visual drawing test device for geosynthetics

Abstract

The invention relates to a large visual drawing test device for geosynthetics. The large visual drawing test device for the geosynthetics comprises a test box for placing a sample, a vertical loading system and a horizontal loading system, wherein the test box is filled with a filler; the vertical loading system is mounted above the test box; the horizontal loading system comprises a horizontal load applying device and a drawing clamp; the drawing clamp is connected with the horizontal load applying device by virtue of a telescopic rod; a displacement sensor I is mounted between the horizontal load applying device and the drawing clamp; armored glass is arranged on the test box; a digital photographing and recording device used for photographing and recording a change process of the sample in the test box is mounted on the front surface of the armored glass; a displacement sensor II is mounted on one side with a through hole of the test box; one end of the sample in the test box is connected with the drawing clamp and the other end is connected with the displacement sensor II during drawing. By virtue of the large visual drawing test device for the geosynthetics, the error generated when data is read, recorded and processed during testing is reduced, so that the data is more accurate.

Description

technical field [0001] The invention relates to a pull-out test device, in particular to a large-scale visual pull-out test device for geosynthetic materials. Background technique [0002] The currently disclosed pull-out test equipment only measures the displacement of the front end of the reinforced material during the pull-out test, and does not measure the displacement of the middle and end of the reinforced material, so that there is a large error in the test process. At the same time, real-time Measuring the displacement of the middle and end of the reinforcement is helpful to study the whole process of the reinforcement and the mechanism of reinforcement and soil action; the size of the pull-out test equipment is generally relatively small at this stage, and the pull-out test is limited by the size effect of the indoor model , the research on the interface interaction between reinforcement and soil is inevitably affected by the boundary effect; on the other hand, the ...

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Problems solved by technology

[0002] The currently disclosed pull-out test equipment only measures the displacement of the front end of the reinforced material during the pull-out test, and does not measure the displacement of the middle and end of the reinforced material, so that there is a large error in the test process. At the same time, real-time Measuring the displacement of the middle and end of the reinforcement is helpful to study the whole process of the reinforcement and the mechanism of reinforcement and soil action; the size of the pull-out test equipment is generally relatively small at this stage, and the pull-out test is limited by the size effect of the indoor model , the research on the interface interaction between reinforcement and soil is inevitably affected by the boundary effect; on the other hand, the existing test equipment can only obtain the macroscopic mechanical response of the interaction process of the reinforcement-soil interface, but cannot ascertain the interaction process of the reinforcement-soil The evolution law of the meso-fabric of sandy soil at the middle interface makes it impossible to reveal the meso-mechanical nature of the interfacial interaction between reinforcement and soil from the granular medium level, which limits the development of reinforcement technology and the in-depth study of the meso-deformation mechanism

In addition, there are many defects in the reading, recording and processing of test data, which are prone to errors and cannot obtain accurate test results.

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