土工基础

土工基础 ›› 2022, Vol. 36 ›› Issue (5): 692-695.

• 工程实录 • 上一篇    下一篇

考虑竖向变形影响的钢拉杆优化设计

刘 毅,许明军,杨 琴   

  1. （华设设计集团股份有限公司水下隧道智能设计、建造与养护技术与装备交通运输行业研发中心，南京 210014）
  • 收稿日期:2021-04-02 修回日期:2021-04-19 出版日期:2022-10-30 发布日期:2022-10-24
  • 作者简介:刘毅（1988-），男，高级工程师，研究方向为道路隧道设计。
  • 基金资助:
    2020年江苏省省级战略性新兴产业发展专项资金项目（苏发改高技【2020】645）

Optimal Design of the Steel Tie Rods Considering the Influence of Settlement

LIU Yi, XU Mingjun， YANG Qin   

  1. (Research and Development Center for Transportation Industry of Technologies and Equipment for Intelligent Design, 
    Construction and Maintenance of Underwater Tunnel, China Design Group Co. Ltd., Nanjing 210014)
  • Received:2021-04-02 Revised:2021-04-19 Online:2022-10-30 Published:2022-10-24

摘要： 为了研究双排钢围堰钢拉杆上部填土及附加荷载引起土层竖向位移对钢拉杆变形及轴力的影响，完善钢拉杆设计理论，采用有限元法计算钢拉杆在施工、使用过程中的变形和轴力。研究表明：拉杆上部填土自重和表面竖向荷载会导致其发生明显的向下弯曲变形，变形使得拉杆轴力增加约20%～35%，基于分析结果优化了钢拉杆计算公式，提出拉杆弯曲系数。

关键词: 钢围堰, 弯曲系数, 有限元, 钢拉杆

Abstract: In order to study the influence of the settlement of the soil layers induced by the upper part of the filled soil in a double-row steel sheet pile cofferdam, to study the influence of the additional loads from the deformation on the  axial force of the steel tie rods, and to improve the design theory of steel tie rods, the deformation and axial force of the steel tie rods during construction and operation are evaluated by the finite element method in this paper. The results show that the weight of the filled soil above the steel tie rods and the vertical load on the surface of the filled soil will cause a significant downward bending deformation, which increases the axial force of the steel tie rods by about 20% to 35%. Based on the results, the formula of the steel tie rods could be optimized and the tie rod bending coefficient is proposed.

Key words: Steel Cofferdam, Bending Coefficient, Finite Element Method, Steel Tie Rod

中图分类号: