土工基础

土工基础 ›› 2020, Vol. 34 ›› Issue (2): 208-211.

• 专题论述 • 上一篇    下一篇

双壁钢围堰施工过程受力数值模拟分析

戴良军1,2，祝金龙2，崔林钊1，朱大勇2，姚华彦2   

  1. （1.安徽建工集团股份有限公司，合肥 230062；2.合肥工业大学土木与水利工程学院，合肥 230009）
  • 收稿日期:2019-11-01 修回日期:2019-12-04 出版日期:2020-05-20 发布日期:2020-05-20
  • 作者简介:戴良军（1963-），男，教授级高级工程师，研究方向为道路与基坑工程。

Numerical Simulation of the Construction of a Double Sheet Pile Wall Cofferdam

DAI Liangjun1,2, ZHU Jinlong2, CUI Linzhao1, ZHU Dayong2, YAO Huayan2   

  1. (1.Anhui Construction Engineering Group Co. Ltd., Hefei 230062;
    2.College of Civil Engineering, Hefei University of Technology, Hefei 230009)
  • Received:2019-11-01 Revised:2019-12-04 Online:2020-05-20 Published:2020-05-20

摘要： 深水基础常出现于大型桥梁工程中，双壁钢围堰作为桥梁深水基础施工的一种围水结构被得到了大量应用。为分析围堰在不同工况、抽水水位及流水速度下的应力应变特性，分布及发展规律，建立三维有限元模型进行数值计算，结果表明，抽水后围堰的变形和应力远大于围堰着床后的变形和应力，但围堰满足强度要求；抽水阶段，变形集中在围堰中间段的部位，随着抽水的进行，变形逐步增大，最大变形位置下移。

关键词: 双壁钢围堰, 数值分析, 水位, 变形

Abstract: The deep-water foundations are required in various large bridge construction projects. As an efficient temporary cofferdam structure for the deep-water foundation construction, the double sheet pile wall cofferdam has received wide applications. This paper presents a case history for the numerical simulation of a cofferdam under different working conditions, water tables and water velocities by using a three-dimensional finite element software. The following conclusions can be obtained: The deformation and stress in the cofferdam after the dewatering are much greater than it was fully inserted in the mudline, but the cofferdam strength meets code requirements. At the beginning of the dewatering, the maximum deformation concentrates at the middle portion of the cofferdam. The location of the maximum deflection gradually moves downward with the increase of dewatering.

Key words: double sheet pile wall cofferdam, numerical simulations, groundwater, deformation

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