单支点桩锚支护结构设计方法的探讨  

Discussion on Design Method of Single Point Pile-anchor Supporting Structure

作　　者：许坤坤 祝彦知[1,2] 纠永志[1,2] 祁春伟 Xu Kunkun;Zhu Yanzhi;Jiu Yongzhi;Qi Chunwei(School of Civil Engineering,Zhongyuan University of Technology,Zhengzhou,450007,Henan,China;Architectural Design and Research Institute,Zhongyuan University of Technology,Zhengzhou,450007,Henan,China;Henan Zhongchang Construction En-gineering Co.,Ltd.,Luoyang,471003,Henan,China)

机构地区：[1]中原工学院建筑工程学院,河南郑州450007 [2]中原工学院建筑设计研究院,河南郑州450007 [3]河南省中昌工程建设有限公司,河南洛阳471003

出　　处：《岩土工程技术》2022年第4期305-310,共6页Geotechnical Engineering Technique

摘　　要：为探索合理的深基坑单支点桩锚支护设计方法,兼顾其安全可靠性和经济合理性,以工程实例为分析背景,分别采用静力平衡法、等值梁法、弹性支点法、有限元法对支护桩的内力、位移、嵌固深度、支锚力以及基坑周围地表沉降等进行计算。结果表明:对于支护桩的内力,静力平衡法和等值梁法的计算结果较大,弹性支点法次之,有限元分析法最小;对于支护桩的位移,采用理正深基坑支护设计软件中的弹性法模拟支护桩的变形较差,而采用有限元软件模拟的结果更符合支护桩的实际变形;对于地表沉降量,“理正软件”中的“m”法计算结果更符合实际。In order to optimize the design of single-point pile-anchor support for deep foundation pit,both safety reliability and economic rationality should be guaranteed.Based on an engineering example,static equilibrium method,equivalent beam method,elastic fulcrum method and finite element method were used respectively to calculate the internal force,displacement,minimum soil depth,anchorage force and ground settlement around the foundation pit.The results show that:the internal force of supporting pile calculated by static equilibrium method and equivalent beam method is the largest,then elastic fulcrum method,and smallest by finite element method.In the displacement analysis of the supporting pile,the elastic fulcrum method is used to simulate the deformation of the supporting structure,but the finite element method is more in line with the actual deformation of the supporting pile.As for surface settlement,the results calculated by"m"method are basically consistent with the results of finite element analysis.

关 键 词：深基坑 桩锚支护 等值梁法 弹性支点法 有限元法 

分 类 号：TU473[建筑科学—结构工程]