›› 2007, Vol. 28 ›› Issue (4): 799-802.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Field study of tensile force character of double-layered geogrid in reinforced gravel cushion

HU Qi-jun1，XIE Qiang1，QING San-hui2   

  1. 1. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China; 2. The Second Railway Survey & Design Institute, Chengdu 610031, China
  • Received:2005-05-08 Online:2007-04-10 Published:2013-09-05

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Abstract: According to field study, it is shown that the tensile force of geogrid in the crosswise direction is largest in the road center; the upper layer reduce 29.5 percent compared with the lower layer in double-layer grid; geogrid of the upper layer in the longitudinal direction works earlier than the lower layer. Track laying can enlarge the value of the tensile force of geogrid in the longitudinal and crosswise directions; but without influence on the roadbed deformation. The reinforced cushion can increase the value of stress ratio of pile to soil inside composite foundation .

Key words: geogrid, roadbed deformation, stress ratio of pile to soil

CLC Number: 

  • U 213.1+52.3
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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