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赵玉成1 ,  刘栩阳1 ,  马朝阳2

 

( 1 .  石家庄铁道大学 土木工程学院 ，石家庄 050043 ,  2.  唐山市规划建筑设计研究院有限公司 ，唐山 063000)

摘   要 ：提出并探讨了一种新型微型桩结构 ，在传统微型桩基础上 ，创新性地采用单根螺旋钢筋替代传统钢筋笼。基于 Abaqus 有限元分析软件 ，构建了新型钻孔微型桩的三维数值模型 ，系统研究了其承载性能 、破坏模式 、荷载传递机制及关键影响因素。结果表明： 桩长对抗拔承载力提升效应显著 ，但当桩长超过临界值后，承载力增长呈现递减特性 ；桩身设置合理倾角可有效增强基础稳定性 ；桩土材料参数中土体黏聚力对承载力影响相对较小 ，桩土间摩擦系数对承载力影响较大。结果可为相关工程提供参考。

关键词：新型钻孔微型桩 ；数值模拟 ；承载能力

中图分类号：TU473           

文献标志码：A           

文章编号： 1005- 8249   (2025)  04- 0062- 06

DOI:10. 19860/j.cnki.issn1005 - 8249.2025 .04.012

 

ZHAO Yucheng1  ,  LIU Xuyang1  ,   MA Zhaoyang2

( 1 . School of Civil Engineering ,   Shijiazhuang Tiedao University ,   Shijiazhuang 050043 ,   China;

2. Tangshan Planning and Architectural Design & Research Institute Co . ,  Ltd. ,  Tangshan 063000 ,   China) 

Abstract : This study proposes and investigates a novel micropile structure , which innovatively utilizes a single helical reinforcement bar to replace the traditional reinforcement cage.  Using the Abaqus finite element analysis platform ,  a three - dimensional numerical model of the novel bored micropile was established.  The model was employed to systematically investigate its bearing performance , failure modes , load transfer mechanisms , and key influencing factors.  The results indicate that the pile length significantly enhances the uplift bearing capacity; however , beyond a critical length , the capacity increase exhibits a diminishing growth pattern.  Setting an appropriate inclination angle for the pile body can effectively enhance foundation stability.  Among the pile - soil material parameters , soil cohesion has a relatively minor influence on the bearing capacity , while the friction coefficient at the pile - soil interface exerts a more substantial effect.  The findings of this study can provide valuable references for related engineering practices.

Key words : novel single bored micro - pile; numerical simulations; ultimate bearing performance

作者简介：赵玉成  (1969—) ,   男 ，硕士 ，教授 ，研究方向：城市地下工程理论与应用。

收稿日期：2024 - 04 - 18