土工基础

›› 2012, Vol. 26 ›› Issue (4): 27-30.

• 工程实录 • 上一篇    下一篇

全掏挖基础在戈壁滩地区输电线路中的应用

 赵怀宇1，李占岭1，魏蓬辉2   

  1. 1.河北省电力勘测设计研究院，石家庄 050031;2.中国建设银行河北省分行，石家庄 050051
  • 收稿日期:2011-12-09 出版日期:2012-08-20 发布日期:2012-09-07
  • 作者简介:赵怀宇（1982-），男，硕士，工程师，研究方向为岩土工程。

The Application of Bell Ended Piers for Transmission Lines in the Gobi Desert

ZHAO Huaiyu1，LI Zhanling1， WEI Penghui2   

  1. 1.Hebei Electric Power Design & Research Institute，Shijiazhuang，050031;
    2.Hebei Branch of China Construction Bank，Shijiazhuang，050051
  • Received:2011-12-09 Online:2012-08-20 Published:2012-09-07

摘要： 基于戈壁滩输电线路碎石土地基全掏挖基础试验，在戈壁滩地区全掏挖基础上拔破坏模式研究的基础上，对土体剪切面半径影响参数n、上拔剪切范围内土重等方面进行了研究分析，提出了抗拔承载力修正公式；同时建议戈壁滩碎石土地基中的掏挖基础按摩擦端承桩进行抗压承载力计算；利用上述成果，对±800 kV输电线路全掏挖基础几何参数采用遗传算法进行优化，结果表明，按推荐的全掏挖基础与按规范通用计算公式（n=1.5）设计的全掏挖基础相比，综合造价节约20%以上。

关键词: 戈壁滩, 全掏挖基础, 抗拔承载力, 抗压承载力, 遗传算法, 经济效益

Abstract: This paper recommends an uplift capacity formula for bell ended piers in cobblegravel sized materials in the Gobi Desert. The uplift capacity is established based on the influence zone of the soil shear failure plane parameter, n; and the influence zone of the uplift shear failure mode. The axial compressive capacity of the bell ended pier is also recommended. The foundation dimensions of 800 kV transmission lines are optimized using a generic algorithm. The results indicate that an overall cost saving of 25% can be achieved when compared to the recommended method with the code specified formula (n=1.5).

Key words: Gobi Desert, Excavated Bell Ended Piers, Uplift Capability, Axial Compressive Capability, Genetic Algorithm, Cost Benefit