埋入式抗滑桩承担的滑坡推力分析  

ANALYSIS OF LANDSLIDE THRUST ACTING ON EMBEDDED ANTI-SLIDE PILE

作　　者：敖贵勇 张玉芳[2] 赵尚毅 郑颖人 王永甫 AO Gui-yong;ZHANG Yu-fang;ZHAO Shang-yi;ZHENG Ying-ren;WANG Yong-fu(China Construction Tunnel Corp.LTD.,Chongqing 401320,China;China Academy of Railway Sciences,Beijing 100081,China;Chongqing University of Science and Technology,Chongqing 401331,China;Army Logistics University,Chongqing 401311,China)

机构地区：[1]中建隧道建设有限公司,重庆401320 [2]铁道科学研究院,北京100081 [3]重庆科技学院,重庆401331 [4]陆军勤务学院,重庆401331

出　　处：《工程力学》2020年第S01期187-192,共6页Engineering Mechanics

基　　金：重庆市基础研究与前沿探索项目(CSTC2018jcyjAX0373);中建股份科技研发项目(CSCEC-2017-Z-24)。

摘　　要：采用有限元强度折减法对埋入式抗滑桩加固的滑坡模型进行了数值分析。模拟结果表明,在设计工况下埋入式桩承担的滑坡推力与全长桩承担的滑坡推力相当,推力大小与设计安全系数有关。在极限破坏工况下,桩悬臂段越长,滑体越顶滑动破坏时对应的稳定安全系数也越大,桩承担的滑坡推力越大。由此提出埋入式抗滑桩加固滑坡设计时,埋入式桩的合理桩长可采用强度折减数值方法根据设计安全系数确定,埋入式桩应承担的滑坡推力可用传统极限平衡法按全长桩计算,也可用有限元强度折减法进行校核。The finite element strength reduction method was used to analyze the landslide thrust acting on an embedded anti-slide pile.The results show that:the landslide thrust acting on an embedded pile is equivalent to the landslide thrust acting on a full-length pile,and the thrust is related to the design safety factor.Under the condition of ultimate failure,the longer the cantilever section of the pile,the greater the corresponding stability safety factor when the sliding body is sliding on the top of the pile,and the greater the landslide thrust acting on the pile.As a result,it is proposed that in the design of an embedded anti-slide pile to strengthen landslide,the reasonable length of the embedded pile can be determined by strength reduction numerical method according to the design safety factor.The landslide thrust borne by the embedded pile can be directly calculated by the finite element strength reduction method,or can be checked by the traditional limit equilibrium method according to the full-length of the pile.

关 键 词：埋入式抗滑桩 全长抗滑桩 滑坡推力 有限元强度折减法 设计安全系数 

分 类 号：P642.22[天文地球—工程地质学]