（1 华南理工大学土木与交通学院，广州 510640；2 华南理工大学亚热带建筑科学国家重点实验室，广州 510640）

[摘要]  以某工程实例的地基基础设计为背景，分析了在坡地地层起伏且基岩上部可压缩层厚度不均条件下，CFG桩复合地基基础、筏板基础以及桩基基础的适用性与经济性，并将这三种常用基础设计方案进行了对比分析。结果表明：在坡地地层起伏、基岩上部可压缩层厚度不均、场地存在孤石等不良地质条件下，CFG桩复合地基基础较难控制建筑物的最大沉降量和整体倾斜量；筏板基础能消除场地孤石对施工的影响，但在控制建筑物的最大沉降量和整体倾斜量方面不经济；桩基在控制沉降方面具有优势，且嵌岩桩桩端的抗剪切作用能大大降低基础在基岩分界面存在滑动的潜在风险，在施工时能降低遇到孤石的可能性，满足可行性和经济性要求。

[关键词]  坡地；孤石；CFG桩；筏基；桩基；基础比选

中图分类号：TU472              文献标识码：A          文章编号：

作者简介：李钊，硕士研究生，Email: muzilizhao@126.com。

A high-rise building’s common foundation schemes comparison and selection in a sloping fields

Li Zhao¹, Liu Tingjin^{1, 2}，Xia Wenyu¹

（1 School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, China; 2 State Key Laboratory of Subtropical Architecture Science, South China University of Technology, Guangzhou 510640, China）

Abstract: In the background of a foundation design of an engineering example, the applicability and economy of CFG

pile composite foundation, raft foundation and pile foundation were analyzed under the condition of the rock ups and downs and thickness inequality of compressible soil in upper rock in a sloping slope, and the three schemes of foundation design were contrasted and analyzed. The results show that in the conditions of rock ups and downs and thickness inequality of compressible soil in upper rock and boulder, the raft foundation is difficult to control the building’s biggest settlement and the tilting quantity, which is the same with CFG piles composite foundation in a low price, but it can eliminate the influence of boulder in the construction. Rock-socketed pile end shearing action can greatly reduce the foundation in the bedrock interface slip of potential risk, and it can reduce the possibility of boulder met in the pile foundation construction, which achieve applicability and economy for a project.

Keywords: sloping field; boulder; CFG piles; raft foundation; pile foundation; foundation comparison and selection

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