Geosynthetic material contact surface friction strength test method

A geosynthetic material, strength testing technology, applied in analytical materials, measuring devices, instruments, etc., can solve problems such as the inability to meet stress environment requirements, and achieve the effect of simple manufacturing and high measurement accuracy

Inactive Publication Date: 2015-10-28
云南武易高速公路建设指挥部 +1
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  • Abstract
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Problems solved by technology

How to measure the friction strength of geosynthetics in rock-soil slopes, there is no suitable experimental equipment for measurement so far. At present, more indicators such as the horizontal shear strength of geosynthetics are used for design and construction, which obviously cannot meet the requirements of geosynthetics. Stress environment requirements for laying synthetic materials or geotextiles on slopes

Method used

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  • Geosynthetic material contact surface friction strength test method
  • Geosynthetic material contact surface friction strength test method
  • Geosynthetic material contact surface friction strength test method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0027] Embodiment: The test method for the friction strength of the contact surface of geosynthetics is as follows,

[0028] ①According to water content 15%, stone content 20% and density 1.9g / cm 3 Requirements, weigh the soil body, gravel and water of corresponding quality, mix the soil body, gravel and water evenly to become a mixture, and divide it into three uniform parts for later use;

[0029] ②Move the rail car 8 to the sample loading platform 5, align the upper shear box 6 with the lower shear box 7 via the ball shaft row 12, put the first mixture into the lower shear box 7, and place the pressure plate 26 is placed on the mixture, the rail car 8 is moved to just below the vertical loading shaft 25, the first jack 15 and the second jack 19 are started, and the first supporting base 16 and the second supporting base 18 are respectively connected to the loading Frame 2 is contacted, rail car 8 is suspended in the air, first servo motor 3 is started, vertical loading sha...

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Abstract

The invention relates to a geosynthetic material contact surface friction strength test method, which is characterized by employing a test device to acquire geosynthetic material contact surface friction strength parameters. The device comprises a reaction frame (1), a loading frame (2), a first servo motor (3), a second servo motor (4), a sample carrying platform (5), an upper shear box (6), a lower shear box (7), a rail car (8), a horizontal slide rail (17), a horizontal loading shaft (22), and a vertical loading shaft (25), etc. Through the interaction of a geosynthetic material and a geologic body under the action of different vertical loads, normal stress and shear stress on an oblique section can be obtained, thereby acquiring friction strength parameters. The method provided by the invention can be used for acquiring the friction strength parameters between various geosynthetic materials including geotechnical fabrics, geomembranes, geotechnical cloth, geogrids, geotechnical pads, geotechnical special materials, geocomposites and the like in civil engineering or geological engineering and geologic bodies.

Description

technical field [0001] The invention relates to a geotechnical testing method, which belongs to the field of testing the friction strength between geotechnical synthetic materials and geological bodies in the field of civil engineering or geological engineering. Background technique [0002] Geosynthetics are widely used in the fields of civil engineering or geological engineering, which can provide balanced stress for rock and soil and form a composite structural system. With the extensive development of geotechnical engineering construction in my country, reinforced soil technology, landfill liner anti-pollution technology, etc. have been rapidly promoted, and the application of technology far exceeds theoretical research. How to measure the friction strength of geosynthetics in rock and soil slopes, there is no suitable experimental equipment for measurement so far. At present, more indicators such as the horizontal shear strength of geosynthetics are used for design and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N19/02
Inventor 李志清
Owner 云南武易高速公路建设指挥部
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