土工基础

›› 2013, Vol. 27 ›› Issue (1): 46-48.

• 工程实录 • 上一篇    下一篇

大型圆形基坑环向承载力的探讨

古少枫,鲁 稳   

  1. （华南理工大学土木与交通学院 岩土工程系，广州 510641）
  • 收稿日期:2012-06-22 出版日期:2013-02-28 发布日期:2013-03-05
  • 作者简介:古少枫（1987-），男，广东汕头人，2011年就读于华南理工大学土木交通学院，硕士在读，研究方向为地下结构抗震。

The Circumferential Bearing Capacity of Supporting Structures foe a Large Circular Deep Excavations

GU Shaofeng， LU Wen   

  1. (School of Civil and Transportation Engineering，South China University of Technology，Guangzhou 510641)
  • Received:2012-06-22 Online:2013-02-28 Published:2013-03-05

摘要： 大型圆形地下结构是一种能够结合基坑体系功能，利用拱效应发挥良好受力性能的地下结构形式，具有结构简单，适应性广，施工速度快等优点。基于弹性力学，分析圆筒的环向应力与径向应力，表明大型圆形基坑支护结构的环向应力随外径增加近似呈线性关系，得出支护结构必须满足的环向承载力要求，以完善基坑设计的相关规范。

关键词: 大型圆形基坑, 地下连续墙, 弹性力学, 环向应力, 径向应力

Abstract: The large circular underground supporting structure is a good form of structure which combines the system function of deep excavations as wells as takes the advantage of the arch effect. This structure has the advantage of simplicity, wide applications and fast construction. Currently, the major concern in the structural design is focused on the structural stability. The arch effect is neglected in the conventional vertical section analysis. Therefore, the circumferential stress might be underestimated as a result of the conventional analysis. This paper estimates the tangential and radial stress of the circular supporting structures based on the classical solution of a linearly load elastic tube. It is concluded that the circumferential stress of the circular supporting structure is approximately increased with the radius of the structure. The tangential stress of the supporting structure should be examined for a safe design of the deep excavation supporting structure.

Key words: Large Circular Supporting Structure, Diaphram Wall, Elastic Theory, Circumferential Stress, Radial Stress