Abstract：The mechanism of geosynthetic membrane effect is analyzed by utilizing geometrical and mechanical method，and the stress state of the embankment within the subsidence cupboard is deduced based on an assumption of an idealized slanted sliding surface，and the development of the shearing stress along the sliding surface is considered in the coefficient of active lateral earth pressure. The membrane effect and stress-strain state are coupled in the proposed calculation model. Then，a physical model test was performed to monitor the settlement and induced axial tensile strains of reinforcements，and the earth pressure，etc. A comparison of the test results to the proposed calculation model and several traditional design methods demonstrates that：the proposed method results are more close to the test results，which can take good care of the varying process of relative displacement and realistic slanted sliding surface. Because of different definitions of coefficient of lateral earth pressures，the vertical stress calculated from Terzaghi?s method is small while that from Handy?s method is large；For the strain of geosynthetic，the Giroud?s method is considered to be too conservative and the Esponiza?s is a little small，and the strain calculated from the proposed method is a little large，but it is reasonable when considering the serviceability and long-term creep of the geosynthetic.
吕伟华，缪林昌，王 非. 基于不完全土拱效应的土工格栅加固机制与设计方法[J]. 岩石力学与工程学报, 2012, 31(3): 632-639.
LU Weihua，MIAO Linchang，WANG Fei. MECHANISM OF GEOGRID REINFORCEMENT BASED ON PARTIALLY DEVELOPED SOIL ARCH EFFECT AND DESIGN METHOD. , 2012, 31(3): 632-639.
陈仁朋，贾 宁，陈云敏. 桩承式加筋路堤受力机制及沉降分析[J]. 岩石力学与工程学报，2005，24(23)：4 358-4 367.(CHEN Renpeng，JIA Ning，CHEN Yunmin. Mechanism and settlement analysis of pile-supported and geogrid-reinforced embankments[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(23)：4 358- 4 367.(in Chinese))
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2012, Vol. 31 
