Horizontal displacement modes of tiered geosynthetic reinforced soil retaining wall
YANG Guangqing1，2，LIU Weichao1，LIU Huabei3，WU Lianhai4，ZHOU Shiguang5
(1. School of Civil Engineering，Shijiazhuang Tiedao University，Shijiazhuang，Shijiazhuang，Hebei 050043，China；2. Key Laboratory of Traffic Safety and Control in Hebei，Shijiazhuang Tiedao University，Shijiazhuang，Hebei 050043，China；3. School of Civil Engineering and Mechanics，Huazhuang University of Science and Technology，Wuhan，Hubei 430074，China；4. The Third Survey and Design Institute of China Railway，Tianjin 300142，China；5. China Railway Society，Beijing 100038，China)
The magnitude and modes of horizontal displacement of reinforced soil retaining walls are important to structural design. Based on four large scale model tests and relevant literature,the magnitude，forms and evolution modes of horizontal displacement of tiered geosynthetic reinforced soil retaining walls are investigated. The following conclusionsare obtained from the tests：the maximum horizontal displacement of retaining walls appears at the top of each retaining wall，and the displacement decreases with increasing step width；The horizontal displacement distributions along the upper walls change gradually from linear curve to exponential，while the distributions along the lower walls arelogarithmic curves；Considering the effect of step width on the lower wall horizontal displacement，the critical step width is suggested to be 2/3 of the lower wall height；Thepanel bottom layers of upper wallstranslate along the top layers of lower walls，the translationdecreases with increasing step width and frictional resistanceof panel bottom layers，and the translational direction is influenced by many factors；The horizontal displacement could be reducedby increasing numbers of geosynthetics layers or geosynthetics length in the bottom part of the upper wall and the top part of the lower wall.The results of this study canprovide reference for similar structural applications.
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2018, Vol. 37 
