基于m法的劲性复合桩单桩水平承载力计算方法  

Calculation Method on the Horizontal Bearing Capacity of the Stiffened Deep-Cement-Mixing Monopile Based on m Method

作　　者：洪俊青 包华 周威 夏胞刚 吴昌将 HONG Junqing;BAO Hua;ZHOU Wei;XIA Baogang;WU Changjiang(School of Transportation and Civil Engineering,Nantong University,Nantong 226019,China;Jiangsu Jinzhuang Geotechnical Technology Co.,Ltd.,Nantong 226009,China)

机构地区：[1]南通大学交通与土木工程学院,江苏南通226019 [2]江苏劲桩岩土科技有限公司,江苏南通226009

出　　处：《南通大学学报（自然科学版）》2021年第4期78-86,共9页Journal of Nantong University(Natural Science Edition)　

基　　金：江苏省自然科学基金项目(BK20180954);江苏省产学研合作项目(BY2020176)。

摘　　要：既有劲性复合桩相关技术规范中单桩水平承载力计算方法不是十分明确,尤其是不同规范中关键参数的取值差异较大,给设计初期带来不便。在总结国内相关技术规范关于劲性复合桩水平承载力计算方法基础上,结合足尺或大比例劲性复合桩水平承载力试验数据,基于m法系统讨论了水泥土体对于桩身抗弯刚度及水平承载力的影响规律及地基土水平抗力系数的比例系数m等主要参数取值方法。分析结果表明:计入水泥土体对于桩身抗弯贡献是合理的;水平抗力系数的比例系数m取值可按照《建筑桩基基础规范》(JGJ94—2008)建议取值的基础上提高一个土类别来考虑。The existing calculation methods of the horizontal bearing capacity(HBC)on the stiffened-deep-cement-mixing(SDCM)monopile in relevant design codes are not very clear.The value range of key parameters in different codes diversifies greatly,which leads to the design inconvenience.Based on the summarizations on the existing HBC computation methods for the SDCM monopile derived from domestic design codes,m method is utilized to discuss the influence effects for the pile bending stiffness,the HBC,the main parameters details including m with the contribution of the cement soil to the pile bending stiffness.The analysis shows that the cement soil as a part of pile is reasonable for the bending stiffness of the SDCM monopile.The proportional coefficient of horizontal resistance coefficient of foundation soil,m,can be decided by improving a category of soils in accordance with the suggestion values in Technical Code for Building Pile Foundations(JGJ94-2008).

关 键 词：劲性复合桩 M法 水平承载力 抗弯刚度 

分 类 号：TU473[建筑科学—结构工程]