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嚴(yán)  敏，芮明倬，李自強(qiáng)
(現(xiàn)代設(shè)計(jì)集團(tuán)華東建筑設(shè)計(jì)研究院有限公司，上海200002)

[摘要] 超高層建筑由于高度大，基底樁底的附加應(yīng)力大，需選擇較深較好的土層作為樁基持力層，對(duì)于軟土地基需穿越較厚砂層的情況下，通常會(huì)選用鉆孔灌注樁。超深鉆孔灌注樁的實(shí)際單樁承載力及施工中樁底清淤效果是設(shè)計(jì)中必須考慮的問(wèn)題。本文通過(guò)蘇州東方之門(mén)樁基持力層的選擇及是否采用后注漿工藝的試驗(yàn)比較，表明適合的樁基持力層及施工工藝對(duì)超高層建筑樁基設(shè)計(jì)的重要性，以供其它同類(lèi)工程參考。
[關(guān)鍵詞] 超高層建筑；鉆孔灌注樁；樁基持力層；超長(zhǎng)樁；靜載荷試驗(yàn)；后注漿；樁基沉降及沉降差

Application of Super Length Bored Cast-in-place Pile Post Grouting in "Gate to the east"
Yan Min, Rui Mingzhuo, Li Ziqiang
( East China Architectural Design & Research Institute Co., Ltd. , Xian Dai Architectural Design Group, Shanghai  200002, China)

Abstract: Because of the high additional pressure at the end of pile in high-rise building, we must choose the better bearing stratum for the pile. Usually we choose the bored cast-in-place pile at the situation of driving through thick sand. In the design process,the actual vertical bearing capacity of super length bored cast-in-place pile,and the effect of clearing away the sediments at the end of pile during construction must be considered. For the project of "Cate to the east", through the determining of the pile bearing stratum and the comparison of in-site static loading test of a single pile whether post grouting is adopted, the significance of the choice of pile bearing stratum and the proper method of construction in the design process of pile in high-rise building is proved.
Keywords: super high-rise building;  bored cast-in-place pile;  the bearing stratum of pile;  super length pile;  in-site static loading test of a single pile;  post grouting;  the settlement and the differentce insetlements of pile