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(1 國(guó)家投資項(xiàng)目評(píng)審中心, 北京 100037; 2 北京中巖大地科技股份有限公司, 北京 100041)

摘要: 針對(duì)故宮博物院北院區(qū)建設(shè)工程項(xiàng)目的地層情況、水文概況及結(jié)構(gòu)功能,分析了基坑設(shè)計(jì)的重難點(diǎn). 對(duì)地下連續(xù)墻、排樁+樁間旋噴樁、攪拌樁、鉆孔咬合樁、TRD 工法墻、CSM 工法墻幾種北京常見(jiàn)的止水帷幕工藝進(jìn)行了對(duì)比,依據(jù)項(xiàng)目情況選取兩種適用的地下水控制與基坑支護(hù)形式,即“地下連續(xù)墻+內(nèi)支撐”或“雙排樁/ 內(nèi)支撐+TRD 工法墻”方案. 在綜合考慮方案技術(shù)可行性與經(jīng)濟(jì)可行性后,在造價(jià)增加不多的情況下,推薦耐久性更高的地下連續(xù)墻作為本項(xiàng)目的基坑支護(hù)及止水方案.

關(guān)鍵詞: 故宮博物院北院區(qū); 基坑支護(hù); 方案比選; 地下連續(xù)墻; 排樁; 地下水控制

中圖分類號(hào):TU924 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):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:李東杰,碩士,高級(jí)工程師,主要從事國(guó)家投資項(xiàng)目技術(shù)咨詢、評(píng)審工作,Email:ldj1967@ sina. com.

[引用本文] 李東杰,馮碩,楊寶森. 故宮博物院北院區(qū)基坑支護(hù)方案比選[J]. 建筑結(jié)構(gòu),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.