中国铁道科学2013，Vol.34Issue(3)：32-39,8.DOI:10.3969/j.issn.1001-4632.2013.03.06
深水基础大规模超长钢板桩围堰施工过程安全性分析
Analysis on Safety during Construction Process for Large-Scale and Super-Long Steel Sheet Pile Cofferdam of Deepwater Foundation
摘要
Abstract
A case study was done for the super-long steel sheet pile cofferdam construction practice of the main pier deepwater foundation at Ying River super major bridge of Fuyang-Lu'an Railway.Three-dimen-sional finite element model was established by ANSYS software considering the interactions among steel sheet pile,internal bracing and surrounding soil mass.The mechanical behaviors and safety were analyzed during construction process by simulation analysis for super-long steel sheet pile cofferdam under still water and running water conditions respectively.The results show that the horizontal displacement of steel sheet pile increases constantly with the driving on of construction procedures,and the position of maximum horizontal displacement is located next to the excavation face of foundation pit.The maximum axial stress of each internal bracing appears at the first construction procedure of water pumping and mud suction after its installation,and it fluctuates with the advancement of construction procedures.The construction safety of the last two procedures should be paid special attentions during construction process.The influence of running water pressure on steel sheet pile cofferdam is mainly embodied in that the horizontal displacement of steel sheet pile at upstream face has somewhat increased.Both the safety factors of resistant heave stability for excavation and whole overturning resistance for steel sheet pile cofferdam meet the demand of relevant standards.The structure of steel sheet pile cofferdam is safe during construction process.关键词
钢板桩围堰/施工过程/力学行为/安全性/数值模拟/深水基础/桥梁工程Key words
Steel sheet pile cofferdam/ Construction process/ Mechanical behavior/ Safety/ Numerical simulation/ Deepwater foundation/ Bridge engineering分类
交通工程引用本文复制引用
汤劲松,熊保林..深水基础大规模超长钢板桩围堰施工过程安全性分析[J].中国铁道科学,2013,34(3):32-39,8.基金项目
上海铁路局科研计划项目(2010077) （2010077）
