The interaction between geogrid and soil explains the reinforcement mechanism. Geogrid ribs play a very important role. By middle-scale indoor pull-out test, we analyzed the forces acting on one-way geogrids and two-way geogrid ribs. Results revealed that ribs contributed over 30% of the friction during the pull-out. The friction coefficient and cohesion of interface reduced remarkably in the absence of ribs. Part of the pull-out force measured during the test was provided by geogrid ribs, so the calculation result was smaller than the actual situation.
Key words
geogrid /
interface between reinforcement and soil /
pull-out test /
transverse ribs
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
References
[1] 《土工合成材料应用手册》编写委员会. 土工合成材料应用手册(第2版) [M]. 北京:中国建筑工业出版社, 2000. (The Compiling Committee. Manual of Geosynthetics Application(2nd Edition)[M]. Beijing: China Architecture and Building Press, 2000. (in Chinese))
[2] 施有志. 土工合成材料的工程特性与加筋垫层试验研究[D]. 泉州:华侨大学, 2003.(SHI You-zhi. Experimental Study on Engineering Properties and Reinforced Cushion Geosynthetics[D]. Quanzhou: Huaqiao University, 2003. (in Chinese))
[3] 闫澍旺, BARR B. 土工格栅与土相互作用有限元分析[J]. 岩土工程学报, 1997 , 19(6) :56 - 61.(YAN Shu-wang, BARR B. Geogrid Soil Interaction with Finite Element Analysis[J]. Chinese Journal of Geotechnical Engineering, 1997 , 19(6) :56- 61.(in Chinese))
[4] MYLES B. Assessment of Soil Friction by Means of Shear[C]∥Proceedings of the 2nd International Conference on Geotextiles. Las Vegas, August 1-6, 1982:79- 87.
[5] 王 钊. 国外土工合成材料的应用研究[M]. 香港: 现代知识出版社, 2002.(WANG Zhao. Application of Geosynthetics Abroad[M]. Hong Kong: Modern Knowledge Press, 2002.(in Chinese))
[6] 栾茂田, 肖成志, 杨 庆, 等. 土工格栅蠕变特性的试验研究及黏弹性本构模型[J]. 岩土力学, 2005, 26(2):187-192. (LUAN Mao-tian, XIAO Cheng-zhi, YANG Qing, et al. Geogrid Creep Properties of Experimental Research and Viscoelastic Constitutive Model[J]. Rock and Soil Mechanics, 2005, 26(2): 187-192. (in Chinese))
PDF(1478 KB)
