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| Effect of offset distance on vertical stresses in geosynthetics reinforced soil retaining wall |
| YANG Guangqing1，2，LIU Huabei3，WU Lianhai4，XIONG Baolin1，LI Sanni1 |
| (1. School of Civil Engineering，Shijiazhuang Tiedao University，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，Huazhong University of Science and Technology，Wuhan，Hubei 430074，China；4. The Third Survey and Design Institute of China Railway，Tianjin 300142，China) |
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Abstract In order to study the effect of the offset distance on the magnitude and distribution of vertical stress of tiered geosynthetic reinforced soil wall，a series laboratory tests on geosynthetic-reinforced soil(GRS) two-tier wall models with three offset distances were carried out. The test results indicated that the vertical stress at the bottom increased with the wall height rising and that the maximum value appeared nearby the wall. With the increasing of offset distance，the distribution of the vertical stress along the reinforcement was evolved from V-shape to inverted S-shape. The effect of overlarge offset distance on the vertical stress at the bottom of the two-tier geosynthetic reinforced soil wall was not obvious. The vertical stress at the bottom of the geosynthetic reinforced soil wall was calculated quite accurately with the modified FHWA method and modified Gray elastic solution. The vertical stress in the lower wall decreased with the increasing of the load location distance to the upper tier face. After the loading was applied on the upper tier，the vertical stress at middle and back reinforcement increased，but at the front of reinforcement changed little.
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2016, Vol. 35 
