Clamp for measuring creep deformation of geo-grid material, and using method thereof

A technology of geogrids and fixtures, which is applied in the direction of analyzing materials, measuring devices, instruments, etc., can solve the problem that it is difficult to meet the needs of high-precision grid creep experiments, the accuracy of experimental results is greatly affected, and the vertical application of loads cannot be guaranteed, etc. problem, to achieve the effect of load application specifications, accurate and intuitive experimental data, and elimination of sliding misalignment

Inactive Publication Date: 2012-07-25
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the process of grid creep test is basically mature, but it is not enough in accuracy, and it is more cumbersome. Since the parallel use of fixtures cannot be guaranteed, the length of each grid unit is not equal and the force is unbalanced; the suspension rod and The fixed connection method of the fixture cannot guarantee the vertical application of the load, and the slight lateral force formed has a great influence on the accuracy of the experimental results; Improper will affect the experimental results
Therefore, traditional creep fixtures have been difficult to meet the needs of high-precision grid creep experiments

Method used

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  • Clamp for measuring creep deformation of geo-grid material, and using method thereof
  • Clamp for measuring creep deformation of geo-grid material, and using method thereof
  • Clamp for measuring creep deformation of geo-grid material, and using method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The creep test of a new type of geogrid material is measured by the new measurement device, and the experimental steps are as follows:

[0030] A Place the whole device horizontally, loosen the fixing screws 3 and 4 of the upper and lower fixtures, place the grid to be tested between the fixtures, keep the grid material stretched naturally without bending, and then tighten the fixing screws 3 and 4 to ensure that the grid is in contact with the fixture There will be no relative slippage between them.

[0031] B erect the device, fix the upper fixture 1 on the test bench, use a hydraulic jack to lift the lower tray 9 of the load bar, and ensure that the tray 9 has no downward pulling force on the grille at this time, and then fine-tune the upper and lower fixtures 1 and 2 Make sure that the grille is in a natural straight state, adjust the zero adjustment knob 6 on the scale dial 5, and set it as the initial zero scale.

[0032] C After applying a certain load on the pa...

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PUM

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Abstract

The invention relates to a clamp for measuring creep deformation of a geo-grid material, and a using method thereof. The clamp comprises an upper clamp and a lower clamp; the upper clamp and the lower clamp are vertically connected with an outside measuring rule and an inside measuring rule at the same side, respectively; the outside measuring rule and the inside measuring rule are sleeved and slidingly connected; a graduated disc is arranged at the connection part between the inner side measuring rule and the lower clamp; the lower clamp is movably connected with a load rod through a rotating shaft; and the load rod is connected with a tray. According to the invention, the shortage in the existing creep deformation experiment process is avoided, the experimental error is reduced successfully, the stress born by the grid is more uniform, the load application is more normative, the accuracy rate is higher, the experimental error caused by manual factor is greatly avoided, the operation is convenient, the experiment efficiency is enhanced, and the practicality is higher.

Description

technical field [0001] The invention relates to a device for measuring material creep in geotechnical material property experiments. Background technique [0002] The phenomenon that the deformation of a material increases slowly over time under the action of constant stress is called creep. Creep test refers to the test to detect the creep deformation and creep speed of materials under the action of certain temperature and force. [0003] With the continuous development of civil engineering in my country, the performance requirements of geotechnical materials are gradually improved, and various new geosynthetic materials have been developed one after another. The performance test of new geosynthetic materials has become a direction that people pay close attention to. The performance test experiment of the material has been carried out in depth, and the efficient and accurate determination of the properties of the material has become the mainstream development trend. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/04G01N3/00
Inventor 李利平王庆瀚胡聪李术才周宗青石少帅宋曙光周毅陈云娟
Owner SHANDONG UNIV
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