摘要A slope model that shows the geogrid structural construction at the Nanning outer ring expressway is established using FLAC3D after the property of typical expansive soil in Nanning was tested. Geogrid-soil interaction in the dry-wet cycle affected zone of the slope is analyzed by thermo-mechanical coupling module in FLAC3D based on the similarity between the thermal effect of temperature variation and expansion effect of hygroscopic expansion of expansive soil. The development rule of stress, deformation, and generalized plastic strain in the turn-up geogrid flexible reinforcement of cut slope in expansive soil are obtained. The "frame hoop" mechanism of flexible reinforced cut slope in expansive soil is analyzed and verified according to the stress and deformation of the geogrid in the cut slope in the expansive soil. The results are compared with the stress, strain, and stability of untreated cut slope in expansive soil.
Abstract：A slope model that shows the geogrid structural construction at the Nanning outer ring expressway is established using FLAC3D after the property of typical expansive soil in Nanning was tested. Geogrid-soil interaction in the dry-wet cycle affected zone of the slope is analyzed by thermo-mechanical coupling module in FLAC3D based on the similarity between the thermal effect of temperature variation and expansion effect of hygroscopic expansion of expansive soil. The development rule of stress, deformation, and generalized plastic strain in the turn-up geogrid flexible reinforcement of cut slope in expansive soil are obtained. The "frame hoop" mechanism of flexible reinforced cut slope in expansive soil is analyzed and verified according to the stress and deformation of the geogrid in the cut slope in the expansive soil. The results are compared with the stress, strain, and stability of untreated cut slope in expansive soil.
基金资助:Supported by the National Natural Science Foundation of China (No.50978035); the Road and Transport R&D Project for Western Regions of China Commissioned by Ministry of Transport (No.2009353311060); and the Guangxi Communications Science and Technology Projects (No.2011-20)
通讯作者:
YANG He-ping,E-mail address:cscuyang@163.com
E-mail: cscuyang@163.com
引用本文:
杨和平, 刘雄, 肖杰. 土工格栅反包加筋支护膨胀土堑坡的工作机理[J]. Journal of Highway and Transportation Research and Development, 2016, 10(1): 1-9.
YANG He-ping, LIU Xiong, XIAO Jie. Working Mechanics of Geogrid Enveloping Flexible Reinforcement Treating Cut Slope in Expansive Soil. Journal of Highway and Transportation Research and Development, 2016, 10(1): 1-9.
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2016, Vol. 10 
