（1 南宁学院土木与建筑工程学院， 南宁 530299； 2 广西大学土木建筑工程学院， 南宁 530004；3 广西大学工程防灾与结构安全教育部重点实验室， 南宁 530004；4 广西瑞宇建筑科技有限公司， 南宁 530031）

［摘要］采用弹塑性共同变形法和弹性支点法对两个锚索钢板桩基坑支护工程进行计算分析，比较这两种方法的计算结果，并将计算结果与现场监测数据进行对比。结果表明：由于锚索钢板桩支护存在桩变形大、抗弯刚度小及锚索预应力较大的特点，弹塑性共同变形法更适宜用于锚索钢板桩支护结构的计算，而弹性支点法则严重低估钢板桩水平位移，并影响锚索最优位置的选择。最后，参考弹塑性共同变形法，提出了一种基于弹性支点法的修正计算方法，该方法可修正弹性支点法对锚索钢板桩支护结构的计算误差，为锚索钢板桩支护结构设计提供了一种新方法。

［关键词］基坑； 弹塑性共同变形法； 弹性支点法； 支护结构； 钢板桩； 锚索

中图分类号：TU476-4文献标识码：A文章编号：1002-848X(2021)02-0131-06

Comparative study of elastic-plastic common deformation method and elastic fulcrum method in the design of steel sheet-pile supporting structure with anchor cable

LU Yi1, OU Xiaoduo2,3, TAN Zhijie2, LIU Renzhou4

(1 College of Civil Engineering and Architecture, Nanning University, Nanning 530299, China; 2 College of Civil Engineering, Guangxi University, Nanning 530004, China;3 Key Lab of Engineering Disaster Prevention and Structural Safety of Ministry of Education, Guangxi University,Nanning 530004, China;4 Guangxi Ruiyu Construction Technology Co., Ltd., Nanning 530031, China)

Abstract:The elastic-plastic common deformation method and elastic fulcrum method were used to calculate and analyze two anchor cable steel sheet-pile foundation pit supporting projects. The calculation results of the two methods were compared, and the calculation results were compared with the field monitoring data. The results show that, due to the characteristics of large deformation and low bending stiffness of the pile and large pre-stress of the anchor cable steel sheet-pile support, the elastic-plastic common deformation method is more suitable for the calculation of the anchor cable steel sheet-pile support structure, while the elastic fulcrum method seriously underestimates the horizontal displacement of the steel sheet-pile and influences the selection of optimal position of the anchor cable. Finally, referring to elastic-plastic common deformation method, a correction calculation method based on the elastic fulcrum method is proposed, which can correct the calculation errors of the elastic fulcrum method on the anchor cable steel sheet-pile support structure and provide a new method for the design of the anchor cable steel sheet-pile support structure.

Keywords:foundation pit; elastic-plastic common deformation method；elastic fulcrum method; support structure；steel sheet-pile； anchor cable

*南宁市优秀青年科技创新创业人才培育项目（RC20190208）。

作者简介：卢毅，硕士，助教，Email：luyinnxy@163.com。