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| Experimental Research on the Soft Soil Reinforced by CFG Pile and Dumping Rockfill |
| JIA Liang, ZHU Yan - peng, HE Shi - kai, CHEN Yan – jiao |
| (Lanzhou University of Technology，Lanzhou, Gansu 730050, China) |
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Abstract Abstract：Research purposes： CFG pile and dumping rockfill are often used for the reinforcement of soft soil，and the settlement of expressway subgrade have strict rules to the soft foundation treatment. To explore the effect of the CFG pile and dumping rockfill reinforcement for shallow soft subgrade，experimental research on the settlement is carried out on the Lanyong highway. Single - point settlement meter is embedded on the top of CFG pile and dumping rockfill in the driveway and shoulder position， the settlement is monitored after construction， the change rules of settlement with time and space are analyzed. Research conclusions ：( 1) The settlement of soft soil foundation reinforced by CFG pile and dumping rockfill increases with time. (2)The settlement of shoulder position is greater than the driveway position. (3) The settlement at different depths of CFG pile foundation decreases with the increase of depth，the settlement of CFG pile is less than dumping rockfill reinforcement subgrade, the reinforcement effect of the CFG pile is better than dumping rockfill, the stability of the shallow soft subgrade can be improved and the construction period can be shortened by ground improvement with CFG pile. (4 )The research results can provide the guidances for design and construction of soft soil.
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Received: 02 November 2015
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2016, Vol. 33 
