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岩溶区桥梁基桩极限承载力的突变求解方法

Keywords: 桥梁工程,基桩,突变理论,极限承载力

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Abstract:

分析了岩溶区桥梁基桩极限承载力组成特性及桩端破坏模式,将其极限承载力分为桩侧土体极限侧阻力、嵌岩段极限侧阻力及端阻力3部分.其中,桩侧土体极限侧阻力由各土层极限摩阻力求和可得,嵌岩段极限承载力则引入Hoek-Brown岩石强度准则,采用岩体质量评价指标进行描述.而后,针对岩溶区基桩工程的特点,结合突变理论的基本概念,建立了岩溶区基桩的力学简化模型及其势能函数的表达形式,并导出岩溶区桥梁基桩桩端极限阻力的尖点突变模型的分叉集方程.在此基础上,根据下伏溶洞顶板失稳破坏条件,求解分叉集方程导得岩溶区桥梁基桩桩端极限荷载的表达式,由此提出了岩溶区桥梁基桩极限承载力的确定方法.工程实例对比分析表明该方法的可行性.

References

[1]  郑伟国,谢毓才,薛绪标.岩溶地区桩基选型浅谈[J].岩土工程学报,2011,33(增2):404-407.ZHENG Weiguo,XIE Yucai,XUE Xubiao.Selection ofPile Foundations in Karst Areas [J].Chinese Journal ofGeotechnical Engineering,2011,33(S2):404-407.
[2]  黎斌,范秋雁,秦风荣.岩溶地区溶洞顶板稳定性分析[J].岩石力学与工程学报,2002,21(4):532-536.LI Bin,FAN Qiuyan,QIN Fengrong.Analysis on RoofStability of Karst Cave in Karst Areas [J].ChineseJournal of Rock Mechanics and Engineering,2002,21(4):532-536.
[3]  张建新,吴东云,杜海金.嵌岩桩承载性状和破坏模式的试验研究[J].岩石力学与工程学报,2004,23(2):320-323.ZHANG Jianxin,WU Dongyun,DU Haijin.Testing Studyon Bearing Behaviours and Failure Model of Rock-socketed Pile [J].Chinese Journal of Rock Mechanicsand Engineering,2004,23(2):320-323.
[4]  胡柏学,杨明辉,袁铜森.基于变形控制的岩溶区基桩承载力研究[J].公路交通科技,2009,26(8):11-15.HU Boxue,YANG Minghui,YUAN Tongsen.Study onBearing Capacity of Piles in Karst Based on SettlementControl [J].Journal of Highway and TransportationResearch and Development,2009,26(8):11-15.
[5]  刘利民.关于嵌岩桩桩端阻力计算的一些问题[J].地下空间,1997,17(2):71-75.LIU Limin.Bottom Resistance Calculation of Rock-socketd Pile [J].Underground Space,1997,17(2):71-75.
[6]  赵明华,雷勇,马缤辉.基于Hoek-Brown 强度准则的嵌岩桩极限承载力确定[J].水利学报,2011,42(9):1058-1064.ZHAO Minghua,LEI Yong,MA Binhui.Determination ofUltimate Bearing Capacity of Rock-socketed Pile Based onH-B Strength Criterion [J].Journal of HydraulicEngineering,2011,42(9):1058-1064.
[7]  胡德华,蒋桃荣,潘登,等.岩石强度特性与嵌岩桩桩端极限阻力[J].武汉工程大学学报,2009,31(12):40-43.HU Dehua,JIANG Taorong,PAN Deng,et al.RockStrength Characteristics and Research on Rock-socketedPile-tip Ultimate Resistance [J].Journal of WuhanInstitute of Technology,2009,31(12):40-43.
[8]  曹文贵,程晔,赵明华.公路路基岩溶顶板安全厚度确定的数值流形方法研究[J].岩土工程学报,2005,27(6):621-625.CAO Wengui,CHENG Ye,ZHAO Minghua.Studies onNumerical Manifold Method for Determination of SafeThickness of Karst Roof in Roadbed [J].Chinese Journalof Geotechnical Engineering,2005,27(6):621-625.
[9]  蒋冲,赵明华,曹文贵,等.基于模糊和突变理论的岩溶区桩端溶洞顶板稳定性分析方法研究[J].公路交通科技,2008,25(12):49-64.JIANG Chong,ZHAO Minghua,CAO Wengui,et al.Research on Stability Evaluation Method for Cave Roofunder Pile Tip in Karst Region Based on Fuzzy Theory andCatastrophe Theory [J].Journal of Highway andTransportation Research and Development, 2008, 25(12):49-64.
[10]  龚先兵,赵明华,张永杰.桩端下伏溶洞顶板稳定非概率可靠性分析方法[J].湖南大学学报:自然科学版,2011,38(1):13-17.GONG Xianbing,ZHAO Minghua,ZHANG Yongjie.NonprobabilisticReliability Analysis Method of Karst RoofStability under Pile Tip [J].Journal of HunanUniversity:Natural Science Edition,2011,38(1):13-17.
[11]  JTG D63—2007,公路桥涵地基与基础设计规范[S].JTGD63—2007,Code for Design of Ground Base andFoundation of Highway Bridges and Culverts [S].
[12]  JGJ94—2008,建筑桩基技术规范[S].JGJ94—2008, Technical Code for Building PileFoundations [S].
[13]  贺广零.突变理论新解及其在桩基工程中的应用[J].工程力学,2009,26(9):126-130.HE Guangling.New Catastrophe Theory & Its Applicationin Pile Foundation Engineering [J].EngineeringMechanics,2009,26(9):126-130.

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