載體樁復(fù)合地基承載力靜載試驗和有限元計算
王虎妹1，姚云秀2，趙國平1，閆瑩娜1
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王虎妹1，姚云秀2，趙國平1，閆瑩娜1（1 天津鐵道職業(yè)技術(shù)學(xué)院， 天津 300240； 2 石家莊鐵道大學(xué)， 石家莊 050043）［摘要］通過具體工程靜載試驗，分析了載體樁復(fù)合地基承載受力原理、承載受力與地基沉降。應(yīng)用有限元軟件，并采用分段線性插值的方法，計算得出承載受力與地基沉降的關(guān)系、樁側(cè)阻力隨樁長變化的關(guān)系。結(jié)果表明，載體樁復(fù)合地基可大幅度提高樁基承載能力和減小地基沉降，具有顯著的經(jīng)濟效益和廣泛的應(yīng)用前景，是一項值得大力推廣的技術(shù)。［關(guān)鍵詞］載體樁復(fù)合地基； 承載力； 沉降； 最優(yōu)載體直徑中圖分類號：TU472 文獻標(biāo)識碼：A 文章編號：1002-848X(2013)13-0091-04Static load test and finite element calculation of bearing capacity of pile with bearing base composite foundationWang Humei1, Yao Yunxiu2, Zhao Guoping1, Yan Yingna1（1 Tianjin Railway Technical and Vocational College, Tianjin 300240, China; 2 Shijiazhuang Tiedao University, Shijiazhuang 050043, China)Abstract: Through the static load test of specific engineering, the theory of bearing stress, bearing capacity and foundation settlement of composite foundation pile were analyzed. With finite element software, the piecewise linear interpolation method was used to calculate the relationship between bearing stress and settlement and the relationship of side resistance of piles and length. Results show that the bearing capacity of pile foundation can be greatly improved and foundation settlement can be reduced with the pile with bearing base composite foundation. This kind of technique has obvious economic benefits and broad application prospects, worthy of popularizing.Keywords: pile with bearing base composite foundation; bearing capacity; settlement; optimal carrier diameter作者簡介：王虎妹, 碩士，講師， Email：wanghumei197902@163.com。參考文獻［1］GB 50007—2011建筑地基基礎(chǔ)設(shè)計規(guī)范［S］. 北京：中國建筑工業(yè)出版社, 2012.［2］GB 50021—2001巖土工程勘察規(guī)范［S］.北京：中國建筑工業(yè)出版社，2002.［3］仇凱斌，介玉新，李廣信，等.復(fù)合載體夯擴樁承載力性狀有限元分析［J］.工程力學(xué), 2002, 6(3): 90-94.［4］陳榮, 俞季民. 夯擴樁擴大頭直徑計算的試驗研究［J］.土工基礎(chǔ), 1995, 9(2): 19-25.［5］張正紅.提高碎石樁極限承載力的研究［D］.北京：清華大學(xué),1996.
