不同布桩方式下坡体防护双排抗滑桩受力特征模型试验研究  

Model Experimental Study on the Stress Characteristics of Double Row Slide⁃resistant Piles for Slope Protection Under Different Pile Layout Methods

作　　者：李建全 吕向明[1] 孟武 LI Jianquan;LÜXiangming;MENG Wu(Tianshui Normal University,Tianshui,Gansu 741000,China;Tianshui National Defense Mobilization Office,Tianshui,Gansu 741000,China;Building Materials Tianshui Geological Engineering Survey Institute Co.,Ltd.,Tianshui,Gansu 741000,China)

机构地区：[1]天水师范学院,甘肃天水741000 [2]天水市国防动员办公室,甘肃天水741000 [3]建材天水地质工程勘察院有限公司,甘肃天水741000

出　　处：《施工技术（中英文）》2024年第9期34-39,共6页Construction Technology

基　　金：国家人防科研项目(2015⁃153⁃46);科技型中小企业技术创新基金(23CXGE0016)。

摘　　要：为研究不同布桩方式下双排抗滑桩受力特征,通过开展模型试验,分析不同荷载作用下双排抗滑桩桩顶位移及桩身弯矩变化。研究结果表明,当采用平行布设无连梁布桩方式和平行布设有连梁布桩方式时,前后排抗滑桩桩身最大弯矩均出现在受荷段,且后排抗滑桩桩身最大弯矩大于前排抗滑桩桩身最大弯矩,前后排抗滑桩受力不均衡,可知上述布桩方式不合理,不建议采用。当采用平行有连梁梅花形布桩方式时,初期变形阶段前后排抗滑桩桩顶位移变化基本一致,且在滑坡推力作用下,前后排抗滑桩受力较均衡,可知平行有连梁梅花形布桩方式合理,建议采用。受荷段抗滑桩桩身最大弯矩大于嵌固段抗滑桩桩身最大弯矩,在抗滑桩设计中,可考虑加强受荷段配筋。In order to study the stress characteristics of double row slide⁃resistant piles under different pile layout methods,model tests were conducted to analyze the changes in pile top displacement and pile body bending moment of double row slide⁃resistant piles under different loads.The research results show that when using the parallel layout without connecting beams and the parallel layout with connecting beams,the maximum bending moment of the front and rear row slide⁃resistant piles occurs in the loading section,and the maximum bending moment of the rear row slide⁃resistant piles is greater than that of the front row slide⁃resistant piles.The force on the front and rear row slide⁃resistant piles is uneven,indicating that the above layout method is unreasonable and not recommended.When using the parallel connected beam plum blossom pile layout method,the displacement of the top of the front and rear row slide⁃resistant piles during the initial deformation stage is basically the same,and under the action of landslide thrust,the force on the front and rear row slide⁃resistant piles is relatively balanced.It can be concluded that the parallel connected beam plum blossom pile layout method is reasonable,and it is recommended to use it.The maximum bending moment of the slide⁃resistant pile body in the loading section is greater than that of the embedded slide⁃resistant pile body.In the design of slide⁃resistant piles,reinforcement in the loading section can be considered.

关 键 词：边坡 抗滑桩 力学性能 试验研究 

分 类 号：TU473[建筑科学—结构工程]