geogrids,pull-out test,frictional resistance characteristic,pull-out force,"/> Research on pull-out test and frictional resistance characteristic of geogrids

›› 2009, Vol. 30 ›› Issue (4): 960-964.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Research on pull-out test and frictional resistance characteristic of geogrids

CHEN Rong 1, 2，LUAN Mao-tian 1, 2，ZHAO Wei 1, 2，XU Xiao-yan 1, 2，HAO Dong-xue 1, 2   

  1. 1. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China; 2. Institute of Geotechnical Engineering, School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China
  • Received:2007-07-03 Online:2009-04-10 Published:2011-01-30

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Abstract:

The interaction property between geogrids and soil is fundamental and important factor on stability of geogrids-reinforced earth structure. A series of experiments to investigate the friction on the surface of pulled geogrids are conducted in the laboratory under various levels of externally-applied load. By analyzing experimental data, some conclusions were drawn that the friction on the surface of geogrids gradually transfers backwards along it, which rapidly increases in early time of the pull-out test and approaches to some stable value ultimately. The relationship between the strain of the geogrids and pulling time is simulated by the sigmoid curve. Based on the experimental data of the strain of the geogrids at different embedments, a three dimensional strain surface that represents a function of coordinate and time is obtained. The time function for pull-out force of geogrids is deduced through integration of friction along total length of geogrids. The experimental data is of referring value for design of geogrids-reinforced earth structure.

Key words: geogrids')">

geogrids, pull-out test, frictional resistance characteristic, pull-out force

CLC Number: 

  • TU 432
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