WANG Ming-yuan, GONG Xiao-nan, BAO Cheng-gang. PULL-OUT BEHAVIOR OF THE INTERFACE BETWEEN GEOGRID AND COMPACTED EXPANSIVE SOIL[J]. Engineering Mechanics, 2009, 26(11): 145-151.
Citation:
WANG Ming-yuan, GONG Xiao-nan, BAO Cheng-gang. PULL-OUT BEHAVIOR OF THE INTERFACE BETWEEN GEOGRID AND COMPACTED EXPANSIVE SOIL[J]. Engineering Mechanics, 2009, 26(11): 145-151.
WANG Ming-yuan, GONG Xiao-nan, BAO Cheng-gang. PULL-OUT BEHAVIOR OF THE INTERFACE BETWEEN GEOGRID AND COMPACTED EXPANSIVE SOIL[J]. Engineering Mechanics, 2009, 26(11): 145-151.
Citation:
WANG Ming-yuan, GONG Xiao-nan, BAO Cheng-gang. PULL-OUT BEHAVIOR OF THE INTERFACE BETWEEN GEOGRID AND COMPACTED EXPANSIVE SOIL[J]. Engineering Mechanics, 2009, 26(11): 145-151.
(1. Key Lab of Geotechnical Mechanics and Engineering of the Ministry of Water Resources, Yangtze River Scientific Research Institute, Wuhan, Hubei 430010, China; 2. Institute of Geotechnical Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China; 3. School of Architecture and Civil Engineering of Wuhan University of Technology, Wuhan, Hubei 430070, China)
A large-scale shear test apparatus with the filling of 600mm×600mm×600mm size is employed to carry out a series of pull-out tests, to investigate the interface behavior between the geogrid and compacted expansive soil. In the tests, the high density polythene (HDPE) uniaxial geogrid and the weathered expansive marlite in Xinxiang, the Middle Route of South to North Water Transfer Project (SNWT) are adopted. The results show that under the great vertical load, the geogrid deformation is great, the pull-out force approaches the peak value when the rigid motion occur more, the interface friction distributes nonuniformly, and the uniform degree varies with the pull-out force. While under the lower vertical load, the rigid motion of geogrid takes a great proportion to the total displacement, and the interface friction distributes uniformly basically. When the interface friction distributes nonuniformly, the average friction may decrease even under a greater vertical load. The peak strength of the interface can be attained with the relative displacement no more than 1cm―2cm. The strength curve of the interface can be described as a linear function.