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    劉芝平
    （南京市城市建設(shè)開發(fā)集團(tuán) 210002）

[提要] 介紹用深層攪拌樁支護(hù)基坑的設(shè)計(jì)與施工方法。深層攪拌樁在我國建筑工程中不僅用于地基加固，而且在基坑支護(hù)中也得到了廣泛應(yīng)用。但當(dāng)?shù)鼗闆r太差，基坑較深或場地較窄時(shí)，該工法就受到一定限制。筆者通過多次學(xué)習(xí)與實(shí)踐，認(rèn)為增加槽底加固樁可擴(kuò)大其使用范圍，并可大幅度降低工程造價(jià)。
[關(guān)鍵詞] 基坑支護(hù) 深層攪拌樁 傾覆 滑移 整體穩(wěn)定

This paper introduces the design and construction method of foundation pit supporting with Deep Mixing Cement Piles(DMCP). The DMCP is adopted widely not only in ground improvement but also in supporting structure of pit, but when the condition of ground is worse, or the excavation of foundation pit is deeper, or the area of site is smaller, the application of the DMCP is limited in certain extent. The author summarised in the study and practice that the DMCP application can be extended by increasing the number of braced piles in the bottor of pit, and the cost of engineering can be decreased largely.
Keywords: foundation pit supporting; deep mixing pile; twist; slide; overall stability