中南大学学报（自然科学版）2018，Vol.49Issue(6)：1440-1446,7.DOI:10.11817/j.issn.1672-7207.2018.06.017
基于能量法柔性桩复合地基的沉降计算
Settlement calculation of composite foundation with flexible piles by energy method
摘要
Abstract
In order to accurately calculate the settlement of the flexible piles composite foundation, the settlement calculation based on energy method was carried out. Firstly, on the basis of the load transfer method, the energy equation of soil and pile was derived and the expression of the total potential energy of the composite foundation was established based on the hypothesis that the relationship between the friction and the relative displacement conforms with that of the relationship between elastic and plastic. The load-sharing ratio of pile-soil was obtained based on the principle of the minimum potential energy. Then, the modified Cam-clay model was used to calculate the compression of the soil around the pile, and the stress-strain curve of the flexible piles was introduced to calculate the compression of piles, either of which constitutes the settlement of composite foundation along with the compression of underlying stratum. Finally, the method was verified by the indoor experiment and the existing cases. The results show that the calculated settlement of the composite foundation agrees with the measured results, which verifies the correctness of the proposed method.关键词
能量法/最小势能原理/柔性桩复合地基/沉降/修正剑桥模型Key words
energy method/principle of the minimum potential energy/composite foundation with flexible piles/settlement/modified Cam-clay model分类
建筑与水利引用本文复制引用
张可能,吴有平,何杰,刘杰,胡达,张云毅..基于能量法柔性桩复合地基的沉降计算[J].中南大学学报（自然科学版）,2018,49(6):1440-1446,7.基金项目
国家自然科学基金资助项目(51108176)(Project (51108176) supported by the National Natural Science Foundation of China) （51108176）
