›› 2010, Vol. 31 ›› Issue (12): 3784-3788.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Triaxial compression test on multilayer reinforced tailing sand

NING Zhang-xuan1, FENG Mei-sheng 1, 2, WANG Feng-jiang3, WANG Lai-gui2   

  1. 1. Department of Civil Engineering, Shanxi Datong University, Datong, Shanxi 037003, China; 2.College of Mechanics and Engineering, Liaoning Technical University, Fuxin, Liaoning 12300, China; 3. Qinghuangdao Research Institute of Metallurgy Design, Qinhuangdao, Hebei 066001, China
  • Received:2009-04-20 Online:2010-12-10 Published:2010-12-21

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Abstract:

Tiaxial compression tests are made with different number of geotexile. It gets the parameters of Duncan-chang model for reinforced sand with 1, 2 and 4 geotexie layers. When 1 or 2 layers, the geotexile has a little restraint on the sand’s lateral deformation and the failure mode is shear failure. When 3 or more layers, the failure mode is tensile failure. Under the two failure modes, the existence of reinforced material can influence the cohension force which is nonlinear increase with the layer’s number, but not the inner friction angle. It defines the coefficient of the enhanced action which has a nonlinear rise according to the layer’s number. When axial strain below 5%-8%, the sand is at the elastic distortion stage, but elasto-plastictity stage when above 8%.

Key words: tailings sand, triaxial compression test, shear strengh, geotextile, duncan-chang model

CLC Number: 

  • TU 411
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