（南京金宸建筑设计有限公司， 南京 210019）

［摘要］南京某商业广场项目占地面积大，基础占工程总造价比例高，合理的基础方案显得尤为重要。通过研究技术资料，根据结构层数、荷载分布及施工方案等因素，对多种可行性基础方案的技术和经济性进行比较，选出合理的基础形式。同时，充分考虑场地地下水及土质情况，利用一定的水浮力来抗压。采用桩底后注浆方式以及进行破坏性试桩以最大化发挥桩基承载力，节约基础造价。

［关键词］基础优化设计； 后注浆钻孔灌注桩； 破坏性试桩； 设计思路

中图分类号：TU473-1文献标识码：A文章编号：1002-848X(2020)02-0122-06

Foundation selection and optimization design of a commercial plaza in Nanjing

Lü Hengzhu, Zhang Weiyu, Zhang Jun, Li Delin

(Nanjing Kingdom Architecture Design Co., Ltd., Nanjing 210019, China)

Abstract:A commercial plaza project in Nanjing covers a large area and the foundation accounts for a high proportion of the total cost of the project. Reasonable foundation plan appears particularly important. Based on the study of the technical data, the technology and economy of various feasible foundation plans were compared according to the number of layers of the structure, the distribution of the load and the construction plan and other factors, to select the reasonable foundation form. At the same time, the ground water and soil quality of the site were fully considered to make use of certain water buoyancy to resist pressure. In order to maximize the bearing capacity of pile foundation and save the cost of foundation, pile bottom post-grouting method and destructive pile test were adopted. 

Keywords:optimization design of foundation; post-grouting bored pile; destructive pile test; design idea

作者简介：吕恒柱，硕士，研究员级高级工程师，一级注册结构工程师，注册土木工程师（岩土），Email：Lhz309@126.com。