电力学报2025，Vol.40Issue(3)：216-224,9.DOI:10.13357/j.dlxb.2025.023
饱和黏土中杆塔拉线盘基础抗拔极限承载力的计算研究
Research on the Calculation for Ultimate Uplift Capacity of the Tower Guyed Disk Foundation in Saturated Clays
效志强 1陈益剑 1张永建2
作者信息
- 1. 中国南方电网 海南电网有限责任公司,海口 571100
- 2. 中国电建集团 海南电力设计研究院有限公司,海口 571100
- 折叠
摘要
Abstract
When the soil weight method is used to calculate the ultimate uplift capacity of the guyed disk founda-tion in the standard Code for Design of Foundation of Overhead Transmission Line(DL/T 5219-2023,here-inafter referred to as the Code),the negative pore water pressure in guyed disk is not considered,which leads to the problem that the soil under the guyed disk is not separated and the uplift contribution increases.Therefore,a more accurate calculation method is proposed.By establishing the vertical,horizontal and bending moment static equilibrium equations of the overall shear failure of the soil,the variational method is introduced to solve the equations,and the calculation formula of the ultimate uplift capacity of the guyed disk foundation in saturat-ed clays is derived,and the influence of cohesion and internal friction angle on ultimate uplift capacity is ana-lyzed.In addition,a simplified look-up table calculation process of load coefficients N1 and N2 is proposed.The results show the results calculated by the formula of ultimate uplift capacity derived in this paper are more than three times that calculatd by using the Code.The ultimate uplift capacity can be obtained efficiently by simpli-fied formula and look-up table method.The method in this paper makes up for the calculation defects of Code,and provides a reference for the design of guyed disk foundation under saturated clay geological conditions.The simplified formula and look-up table method are more convenient for engineering applications.关键词
输电线路/拉线杆塔/拉线盘基础/抗拔极限承载力/变分法/黏聚力/内摩擦角/滑动面方程/滑动面正应力方程/荷载系数Key words
transmission line/guyed tower/guyed disk foundation/ultimate uplift capacity/variational solution/cohesion/angle of internal friction/equation of sliding surface/equation of normal stress on the sliding surface/load coefficients分类
土木建筑引用本文复制引用
效志强,陈益剑,张永建..饱和黏土中杆塔拉线盘基础抗拔极限承载力的计算研究[J].电力学报,2025,40(3):216-224,9.
