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（1 銅陵市建筑工程施工圖設(shè)計(jì)文件審查有限公司， 銅陵 244000； 2 銅陵市建設(shè)工程質(zhì)量監(jiān)督監(jiān)測有限公司， 銅陵 244000）
［摘要］對(duì)《建筑地基基礎(chǔ)設(shè)計(jì)規(guī)范》（GB 50007—2011）、《建筑地基處理技術(shù)規(guī)范》（JGJ 79—2012）、《復(fù)合地基技術(shù)規(guī)范》（GB/T 50783—2012）中的CFG樁復(fù)合地基的規(guī)定進(jìn)行比較，總結(jié)了CFG樁復(fù)合地基設(shè)計(jì)方法，并對(duì)CFG樁復(fù)合地基在超厚土層中和穿越不同土層時(shí)的設(shè)計(jì)方法及承載力低的下臥層驗(yàn)算方法進(jìn)行了探討。結(jié)論如下：在超厚土層中，CFG樁可以不穿透處理土層，但應(yīng)進(jìn)行樁端持力層的承載力驗(yàn)算；CFG樁穿越“上硬下軟”土層時(shí)，可考慮上部硬土層的有利作用，節(jié)約造價(jià)；當(dāng)在受力層范圍內(nèi)存在承載力低的下臥層時(shí)，應(yīng)進(jìn)行下臥層地基承載力驗(yàn)算。
［關(guān)鍵詞］CFG樁； 復(fù)合地基； 下臥層； 承載力驗(yàn)算； 實(shí)體深基礎(chǔ)； 沉降計(jì)算
中圖分類號(hào)：TU473-1文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2019)14-0107-06
Further discussion on design method of CFG pile composite foundation
Li Guosheng1,2
(1 Tongling Architectural Engineering Construction Drawing Design Document Examination Co., Ltd., Tongling 244000, China； 2 Tongling Construction Project Quality Supervision and Monitoring Co., Ltd., Tongling 244000, China)
Abstract:By comparing the requirements of CFG pile composite foundation in Code for design of building foundation (GB 50007—2011), Technical code for ground treatment of buildings (JGJ 79—2012) and Technical code for composite foundation (GB/T 50783—2012), the design method of CFG pile composite foundation was summarized, and the design method of CFG pile composite foundation in super-thick soil layer and when crossing through different soil layers as well as the method for checking calculation of underlying stratum with low bearing capacity were discussed. The conclusion are as following: CFG pile may not penetrate the treated soil layer in the super-thick soil layer, but the checking calculation of bearing capacity of the bearing stratum at the end of the pile should be conducted; when CFG pile passes through the “upper hard and lower soft” soil layer, consideration may be given to the advantageous role of the upper hard soil layer for the purpose of cost saving; when there is an underlying stratum with low bearing capacity in the bearing stratum range, checking calculation of foundation bearing capacity of the underlying stratum should be conducted.
Keywords:CFG pile; composite foundation; underlying stratum; checking calculation of bearing capacity; deep massive foundation; settlement calculation
作者簡介：李國勝，學(xué)士，高級(jí)工程師，一級(jí)注冊結(jié)構(gòu)工程師，Email: 693950802@qq.com。
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