摘要
本文的研究对象是大直径刚性桩。刚性桩在横向受力作用下,桩身挠曲变形不明显,如同刚体一样围绕桩轴某一点转动,通过分析桩土受力和变形性能,在土的本构关系、破坏准则的基础上,通过理论推导出大直径刚性桩在不同地质情况下(非岩石地质和基底嵌入基岩内)受外荷载及土压共同作用下的变形及受力性能,并且用Midas有限元进行验证,据此进行大直径刚性桩的设计及验算。此外,本文建议对于大直径单桩施工过程中需要控制施工工艺和质量,尤其在不良地质情况下需要采取一定的保护措施,以期达到良好的施工效果。本文研究成果可为大直径刚性桩的设计及施工提供参考和帮助。
The research object of this paper is large-diameter rigid pile.Under the action of transverse force,the flexural strain of rigid pile is inapparent,it rotates around a point on the pile axis like a rigid body.Based on the analysis of pile-soil stress,deformation performance,soil constitutive relationship and failure criterion,the deformation and mechanical performance of large-diameter rigid pile affected by external load and earth pressure under various geological conditions(non rock geology and base embedded in bedrock)are deduced through theory,the theory is consistent with the Midas finite element method.The design and checking calculation of large-diameter rigid pile can be carried out accordingly.In addition,it suggested that the construction technology and quality should be controlled during the construction of large-diameter single pile.To meet the qualified construction requirements,protective measures must be taken especially in unfavorable geological conditions.The research results can provide reference for the design and construction of large-diameter rigid pile.
作者
张庆
杨明
陈诚
吴勇
张炜
房庆
ZHANG Qing;YANG Ming;CHEN Cheng;WU Yong;ZHANG Wei;FANG Qing(Jiangsu Power Design Institute Co.,Ltd.,China Energy Engineering Group,Nanjing 211102,China)
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2022年第S01期98-107,共10页
Engineering Journal of Wuhan University
关键词
大直径刚性桩
变形系数
桩土受力
本构关系
破坏准则
施工工艺
large-diameter rigid pile
coefficient of deformation
the pile-soil stress
constitutive relation
failure criterion
construction technology
作者简介
张庆(1989-),男,硕士,工程师,主要从事输电线路设计与研究,E-mail:zhangqing@jspdi.com.cn.
