桂林理工大学学报2016，Vol.36Issue(2)：278-284,7.DOI:10.3969/j.issn.1674-9057.2016.02.013
大型石化 CFG 桩复合地基三维有限差分模拟
3D finite difference simulation of CFG-pile composite foundation in large petrochemical project
摘要
Abstract
CFG piles are more and more widely used in foundation treatment engineering.Currently,soft-soil foundation treatment in large petrochemical project is very complex.In such condition,one 3D finite difference model was built.The stress and deformation behaviors of CFG composite foundation under different pile spacing condition were analyzed in detail.The effect of soft soil interlayer was also investigated.Based on the effect a-nalysis of reinforcement depth,the critical reinforcement depth of different foundation size was obtained.Be-sides,variable rigidity leveling of composite foundation was carried out by variable pile length or spacing meth-od.Some conclusions have been drawn.The relationship between foundation settlement or settlement difference and loading is linear type.CFG pile of the 1 /3 diameter zone outside two sides can be optimized by variable pile length or spacing method.When soil among CFG piles is not reinforced,the pile spacing should not be larger than 6d.If the burial depth of soft soil interlayer is large than 10 m,the effect can be ignored.the critical rein-forcement depth of different foundation size is about 6 m.The foundation settlement or settlement difference can be controlled by variable pile length or spacing method,and suitable method should be chosen for geotechnical and engineering condition.关键词
石化工程/CFG 桩/复合地基/三维/有限差分方法Key words
petrochemical project/CFG pile/composite foundation/3D/finite difference method分类
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丁礼建..大型石化 CFG 桩复合地基三维有限差分模拟[J].桂林理工大学学报,2016,36(2):278-284,7.基金项目
中国石油工程建设公司科学研究与技术开发项目 （）
