陆敏;

• 1:广西大汉岩土工程有限责任公司

摘要(Abstract)：

为了更准确地反映刚性桩复合地基的工作状态,提高实际工程质量,以路堤下CFG复合地基为研究对象,在基本假定的前提下,分别建立类端承桩复合地基和类摩擦桩复合地基的力学模型。分析导出CFG桩复合地基工作的受力平衡条件及变形协调条件,对路堤下CFG桩复合地基桩土应力比计算公式进行修正,并对桩土应力比的影响因素进行分析。以相关文献中基础工程的现场桩土应力实测资料为基础数据,运用修正后的计算方法进行验证。结果表明,类端承型CFG桩复合地基桩土应力比的计算结果与实测结果较为吻合,修正后的计算方法能满足实际工程计算的需要。研究成果可提高实际工作中承载力和沉降的计算准确度,为进一步完善CFG桩地基工程设计及计算方法提供参考。

关键词(KeyWords)： 地基基础工程;CFG桩;路堤;复合地基;力学模型;桩土应力比

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 陆敏;

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参考文献(References)：

• [1] 吕伟华,缪林昌.刚性桩复合地基桩土应力比计算方法[J].东南大学学报(自然科学版),2013,43(3):176-180.LYU Weihua,MIAO Linchang.Calculation method of pile-soil stress ratio of rigid pile composite foundation[J].Journal of Southeast university(Natural Science Edition),2013,43(3):176-180.
• [2] 姜文雨,刘一.刚性桩复合地基中性面深度与桩土应力比计算[J].岩土力学,2018,39(12):266-272.JIANG Wenyu,LIU Yi.Determination of neutral plane depth and pile-soil stress ratio of the rigid pile composite foundation[J].Rock and Soil Mechanics,2018,39(12):266-272.
• [3] 郑俊杰,黄海松.水泥土桩复合地基桩土应力比的解析算法[J].岩土力学,2005,26(9):1432-1436.ZHENG Junjie,HUANG Haisong.Analytical solution of pile-soil stress ratio of soil-cement pile composite foundation[J].Rock and Soil Mechanics,2005,26(9):1432-1436.
• [4] 赵明华,陈庆,张玲.考虑桩顶刺入变形的刚性桩复合地基桩土应力比计算[J].公路交通科技,2009,26(10):38-43.ZHAO Minghua,CHEN Qing,ZHANG Ling.Calculation of pile-soil stress ratio rigid pile composite foundation with consideration of piles upward puncture deformation[J].Journal of Highway and Transportation Research and Development,2009,26(10):38-43.
• [5] 杨涛,李国维.路堤荷载下水泥搅拌桩复合地基桩土应力比的现场试验[J].工业建筑,2008,38(2):69-72.YANG Tao,LI Guowei.Field tests on pile-soil stress ratio of cement-soil mixed pile composite ground under embankment[J].Industrial Construction,2008,38(2):69-72.
• [6] 彭理.刚性桩复合地基桩土应力比计算[D].长沙:湖南大学,2013.PENG Li.Settlement Method for the Calculation of Pile-soil Stress Ratio of Rigid Pile Composite Foundation[D].Changsha:Hunan University,2013.
• [7] 孙林娜.复合地基沉降及按沉降控制的优化设计研究[D].杭州:浙江大学,2006.SUN Linna.Study on Settlement of Composite Foundation and Optimal Design of Settlement Control[D].Hangzhou:Zhejiang University,2006.
• [8] 杨嵘昌,宰金珉.广义剪切位移法分析桩-土-承台非线性共同作用原理[J].岩土工程学报,1994,16(6):103-116.YANG Rongchang,ZAI Jinmin.The principle of the generalized shear displacement method for analyzing the nonlinear interaction of pile-soil-pilecap[J].Chinese Journal of Geotechnical Engingeering,1994,16(6):103-116.
• [9] 中交公路规划设计院有限公司.公路桥涵地基与基础设计规范[M].北京:人民交通出版社,2007.
• [10] 中国建筑科学研究院.建筑桩基技术规范[M].北京:中国建筑工业出版社,2008.
• [11] RANDOLPH M F,WROTH C P.Analysis of deformation of vertically loaded piles[J].Journal of Geotechnical Engineering,1978,104(12):1465-1488.
• [12] 刘吉福.路堤下复合地基桩、土应力比分析[J].岩石力学与工程学报,2003,22(4):674-677.LIU Jifu.Analysis on pile-soil stress ratio for composite ground under embankment[J].Chinses Journal of Rock Mechanics and Engineering,2003,22(4):674-677.
• [13] 但汉成,李亮,赵炼恒,等.CFG桩复合地基桩土应力比计算与影响因素分析[J].中国铁道科学,2008,29(5):7-12.DAN Hancheng,LI Liang,ZHAO Lianheng,et al.Calculation and influence factors analysis on pile-soil stress ratio of CFG pile composite foundation[J].China Rail Way Science,2008,29(5):7-12.
• [14] 李作勤.复合地基中桩土应力比和优化设计[J].岩土力学,1995,16(4):30-37.LI Zuoqin.Stresses ratio of pile-soil and advanced design[J].Rock and Soil Mechanics,1995,16(4):30-37.
• [15] 周志军.路堤下复合地基承载机理与数值模拟研究[D].长沙:湖南大学,2010.ZHOU Zhijun.Study on Bearing Mechanism and Numerical Simulation of Composite Foundation Under Embankment[D].Changsha:Hunan University,2010.