(1 国家投资项目评审中心, 北京 100037; 2 北京中岩大地科技股份有限公司, 北京 100041)

摘要: 针对故宫博物院北院区建设工程项目的地层情况、水文概况及结构功能,分析了基坑设计的重难点. 对地下连续墙、排桩+桩间旋喷桩、搅拌桩、钻孔咬合桩、TRD 工法墙、CSM 工法墙几种北京常见的止水帷幕工艺进行了对比,依据项目情况选取两种适用的地下水控制与基坑支护形式,即“地下连续墙+内支撑”或“双排桩/ 内支撑+TRD 工法墙”方案. 在综合考虑方案技术可行性与经济可行性后,在造价增加不多的情况下,推荐耐久性更高的地下连续墙作为本项目的基坑支护及止水方案.

关键词: 故宫博物院北院区; 基坑支护; 方案比选; 地下连续墙; 排桩; 地下水控制

中图分类号:TU924 文献标志码:A 文章编号:1002⁃848X(2022)16⁃0111⁃05

DOI:10. 19701 / j. jzjg. YG211658

Comparison and selection of foundation pit support schemes for the North Courtyardof the Palace Museum

LI Dongjie1, FENG Shuo1, YANG Baosen2

(1 National Investment Project Review Center, Beijing 100037, China;2 Zhongyan Technology Co. , Ltd. , Beijing 100041, China)

Abstract:According to the stratigraphic condition, hydrological profile and structural function of the construction project ofthe North Courtyard of the Palace Museum, the important and difficult points of foundation pit design were analyzed.Several common water⁃stop curtain technologies in Beijing such as underground diaphragm wall, soldier pile+rotary spraypile between piles, stirring pile, borehole cast⁃in⁃place pile, TRD construction method wall and CSM construction methodwall were compared, and two applicable forms of groundwater control and foundation pit support were selected according tothe project situation, namely " underground diaphragm wall + internal support" or " double row pile / internal support + TRDconstruction method wall" . After comprehensively considering the technical feasibility and economic feasibility of thescheme, the underground diaphragm wall with higher durability is recommended as the foundation pit support and water stopscheme of the project under the condition that the cost increase is not large.

Keywords: the North Courtyard of the Palace Museum; foundation pit support; scheme comparison; undergrounddiaphragm wall; soldier pile; groundwater control

第一作者:李东杰,硕士,高级工程师,主要从事国家投资项目技术咨询、评审工作,Email:ldj1967@ sina. com.

[引用本文] 李东杰,冯硕,杨宝森. 故宫博物院北院区基坑支护方案比选[J]. 建筑结构,2022,52(16):111⁃115,36. LI Dongjie,FENG Shuo,YANG Baosen. Comparison and selection of foundation pit support schemes for the NorthCourtyard of the Palace Museum[J]. Building Structure,2022,52(16):111⁃115,36.