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    周  磊，  李  艷，  蔣鎮(zhèn)華
    (現(xiàn)代設(shè)計(jì)集團(tuán)上海建筑設(shè)計(jì)研究院有限公司，上海200041)

[摘要] 上海東蘭小區(qū)A-2地塊商務(wù)樓基坑支護(hù)工程基坑深10. 6m，地質(zhì)條件復(fù)雜，采用鉆孔灌注樁加兩層鋼筋混凝土圓環(huán)支撐進(jìn)行支護(hù)，一排三軸深層攪拌樁止水。圓環(huán)支撐直徑92m，是上海少有的大直徑圓環(huán)支撐。對(duì)計(jì)算結(jié)果和實(shí)際監(jiān)測(cè)結(jié)果作了對(duì)比分析，得到了一些有益的經(jīng)驗(yàn)。
[關(guān)鍵詞] 深基坑；大直徑圓環(huán)支撐；基坑監(jiān)測(cè)

Foundation Pit Engineering of Donglan Community in Shanghai
Zhou Lei,  Li yan, Jiang Zhenhua
( Xian Dai Architectural Design Group, Shanghai Institute of Arch itectural Design & Research( Co. , Ltd.), Shanghai 200041,  China)

Abstract: A 10.6m-deep foundation pit of Donglan Community in Shanghai, in complex geological conditions, was upheld by drilling-grouting pile and two concrete circular bracings. The diameter of this circular bracing is 90m, and it is rarely seen in Shanghai. Compared the results of the numerical analysis with the measurement, we got some useful conclusion from the project.
Keywords: deep foundation pit; large-diameter circular bracing; construction monitoring