- 摘 要
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（1 北京建筑大學， 北京 100044; 2 北京市建筑設計研究院有限公司， 北京 100045）
［摘要］CFG樁復合地基技術目前已廣泛應用于高層建筑地基處理，但實際工程中CFG樁施工問題頻發(fā)，故引起對其承載力檢測方法的關注，相關規(guī)范也伴隨工程實踐和總結逐漸成熟起來。《建筑地基處理技術規(guī)范》（JGJ 79—2002 ）只要求進行復合地基靜載荷試驗以檢測復合土層承載力，《建筑地基處理技術規(guī)范》（JGJ 79—2012）增加了復合地基增強體單樁靜載荷試驗，要求必須將增強體單樁承載力作為檢測的一項重要指標。本文中某高層辦公樓，在新版規(guī)范（2012版）未使用之前，超前進行了復合地基增強體單樁靜載荷試驗，試驗結果的確有不合格增強體單樁，即在所檢測的5根單樁中，2根單樁承載力未達到設計要求。為此，討論了在進行CFG樁復合地基設計時，進行增強體單樁靜載荷試驗的必要性。
［關鍵詞］CFG樁； 復合地基承載力； 增強體單樁承載力； 靜載荷試驗
中圖分類號： TU41,TU47 文獻標識碼： A文章編號： 1002-848X(2016)S2-0531-04
Case study and discussion on test method for bearing capacity of
composite foundation with CFG piles
Wei Qianyu1, Fang Yunfei2, Lu Pingzhen2, Zhang Huaijing1
(1 Beijing University of Architecture, Beijing 100044, China；
2 Beijing Institute of Architectural Design, Beijing 100045, China)
Abstract: Composite foundation technology with CFG piles has been widely used in high-rise building foundation treatment. But engineering accident was happened frequently in the practical construction processes of the CFG piles. Thus, its bearing capacity test method has drawn greater attention, and the relevant specifications are also gradually mature with engineering practice and summarizes. It only requires load test on composite foundation to test bearing capacity of composite soil according to Technical code for ground treatment of buildings （JGJ 79—2002）. The content of the Technical code for ground treatment of buildings （JGJ 79—2012） has added load test on single pile of composite foundation, and it rules bearing capacity of single pile as an important indicator of detection. In this article, during the construction of a high-rise office building, the load test was carried on the single pile of composite foundation before the new standards (2012 edition) was used. The test result shows that there are unqualified reinforcing single piles indeed. Namely, in the five tested reinforcing single piles, the bearing capacity of two piles did not reach the design requirements. Thus, in this paper, the necessity of enhancing load test on single pile of composite foundation for the design of composite foundation with CFG piles has been discussed.
Keywords： CFG piles; bearing capacity of composite foundation; bearing capacity of single pile; load test
作者簡介： 魏錢鈺，碩士研究生，Email：645082472@qq.com。
