- 摘 要
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（1 河北工業(yè)大學(xué)土木與交通學(xué)院， 天津 300401； 2 河北省建筑科學(xué)研究院有限公司， 石家莊 050021）
［摘要］為了解決淺層掏土法在CFG樁復(fù)合地基中的應(yīng)用問題，首先基于淺層掏土法的基本原理，應(yīng)用彈塑性力學(xué)理論對掏土后CFG樁復(fù)合地基的復(fù)合模量以及沉降理論進(jìn)行分析和參數(shù)確定。然后以一實(shí)際CFG樁復(fù)合地基高層建筑糾偏工程實(shí)例為背景，應(yīng)用有限元數(shù)值分析軟件對阻沉加固、糾傾（掏土、堆載）等階段進(jìn)行全過程模擬分析，驗(yàn)證提出理論的正確性和合理性。通過理論計(jì)算值與數(shù)值模擬結(jié)果的對比分析，結(jié)果表明糾偏建筑物四個角計(jì)算值與模擬值最大差值為10-1mm，誤差為12-4%，最小差值為2mm，說明提出的計(jì)算方法能夠解決復(fù)合地基淺層掏土糾偏設(shè)計(jì)問題。
［關(guān)鍵詞］高層建筑； 糾傾； 淺層掏土； CFG樁復(fù)合地基
中圖分類號：TU746-3文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2019)08-0123-07
Theoretical and application research on shallow digging method in CFG pile composite foundation of high-rise building
Fu Shifeng1,2, Rong Xian1
（1 College of Civil and Communications, Hebei University of Technology, Tianjin 300401, China; 2 Hebei Academy of Building Research， Shijiazhuang 050021， China）
Abstract:In order to solve the application problem of shallow digging method in CFG pile composite foundation, based on the basic principle of shallow digging method, the composite modulus and settlement theory of CFG pile composite foundation after digging were analyzed and determined by using elastic-plastic mechanics theory. Then, based on the background of an actual high-rise building CFG pile composite foundation rectification project, the finite element numerical analysis software was used to simulate the whole process of settlement reinforcement, rectification (digging and surcharge) and other stages to verify the correctness and rationality of the proposed theory. Through the comparison and analysis between the theoretical calculation value and the numerical simulation result, the results show that the maximum difference between the calculated value and the simulated value of the four angles of the rectifying building is 10-1mm, with an error of 12-4% and a minimum error of 2mm, indicating that the proposed calculation method can solve the problem of the rectification design of the shallow digging of composite foundation.
Keywords:high-rise building; rectification; shallow digging; CFG pile composite foundation
作者簡介：付士峰，博士研究生，高級工程師，Email: 18033878005@163.com。
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