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| Research on Settlement Control Effect of CFG Pile-raft Structure Based on Field Test of High-speed Railway |
| LI Bo1, LENG Jing-yan2 |
| The Third Railway Survey and Design Institute Group Corporation, Tianjin 300251, China |
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Abstract Research purposes: Field tests were conducted at a CFG pile-raft structure working point of Beijing-Shanghai High-speed Railway to investigate the deformation law of reinforced zone and substratum compression and total settlement. A further evaluation was made to investigate the settlement control effect of deep foundation treatment with CFG pile-raft structure.
Research conclusions: The result indicates that:(1)The settlement of CFG pile-raft structure meets standard requirements. (2)The substratum settlement is the main part of total settlement, which accounts for 74% of total settlement. (3)The foundation settlement control effect of CFG pile-raft structure is better than that of CFG pile-cap-net. Under current test conditions, the ratio of the former's total settlement to the latter's is 73.5-75%. (4)The analysis showed that, CFG pile-raft structure can be used in preference in unballasted track on soft soil subgrade.
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Received: 15 July 2013
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2014, Vol. 31 
