（1 南京军区建筑设计院， 南京 210005； 2 南京军区南京总医院， 南京 210002）

［摘要］某医疗建筑位于南京市中心地带，地下3层，施工场地狭小，地下室施工采用逆作法施工。本文简要介绍该工程地下室结构与基坑支护协同设计的结构设计方法，重点介绍钻孔嵌岩灌注桩基础、地下室外墙（地下连续墙）、框架柱(竖向支承体系)、框架梁（水平支撑体系）的结构设计；对桩基的平面布置形式、灌注桩单一桩端后注浆技术、逆作法施工的节点设计与施工方法进行了讨论。

［关键词］地下室； 逆作法； 灌注桩后注浆； 地下连续墙； 竖向支承体系； 水平支撑体系

中图分类号： TU93+2,TU375 文献标识码： A文章编号：  1002-848X(2016)S1-0711-05

Structural design of a basement used by top-down construction method

Bao Yuming1， Xiao Bing2， Zhao Yanqiu1， Zhou Jun2

（1 Nanjing Military Area Architecture Design Institute, Nanjing 210005, China; 

2 Nanjing Military Region Nanjing General Hospital, Nanjing 210002, China）

Abstract: A medical building located in the central area of Nanjing, there are three floors in the basement of the building, the construction site is narrow, and top-down construction method is applied in the construction process of the basement. The structure design method of the basement structure and the retaining and protecting for foundation excavation was introduced. The structure design of the pile foundation, the basement exterior wall (diaphragm), the column (supporting system), and the beam (bracing system) are mainly introduced. Plane layout of pile foundation, cast-in-place pile post grouting technology, design and construction method of joints used by top-down construction method are discussed. 

Keywords: basement；top-down construction method；cast-in-place pile post grouting；diaphragm；vertical supporting system； horizontal bracing system

作者简介：鲍育明，博士，高级工程师，一级注册结构工程师，注册监理工程师，Email：yumingbao@sina.com.cn。