摘要
螺旋锚基础作为一种原状土基础,具有施工快捷、机械化程度高、环境影响小等特点,适用于我国青藏高原冻土区。该冻土区输电塔螺旋锚基础适宜采用螺旋锚倾斜布置形式,承台采用钢筋混凝土预制或钢制的结构,这种型式结构简单、受力清晰,可有效发挥螺旋锚承载特性及其承载优势。输电杆基础螺旋锚适宜采用竖直或小角度倾斜的布置形式,同时承台具备水平承载和抵抗倾覆弯矩作用的能力,基础按最不利状态进行设计,采取涂覆防腐蚀涂层、预留腐蚀裕量等防腐设计措施。在青藏高原输电线路工程中具有较好的应用前景。
As an undisturbed soil foundation,helical pile is characterized by quick construction,high mechanization and small impact on the environment,and is suitable for the permafrost regions of the Tibetan Plateau. The transmission tower foundation in the Tibetan Plateau permafrost area is suitable for the sloping arrangement of helical piles and the caps are made of reinforced concrete precast or steel structures,which is simple in structure and clear in stress,and can exert the load-bearing characteristics and advantages of helical foundation. The transmission pole foundations are suitable for the vertical or small angle tilting arrangement,and the bearing platform has the ability of horizontal bearing and resisting overturning moment. The foundation is designed under the most disadvantageous condition,and anti-corrosion measures such as anticorrosion coating and corrosion margin reservation are adopted. The helical pile foundation has a good application prospect in the Tibetan Plateau transmission line project.
作者
黄晓尧
陈建武
何挺
丁士君
HUANG Xiaoyao;CHEN Jianwu;HE Ting;DING Shijun(State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou 310007,China;State Grid Ningbo Power Supply Company,Ningbo Zhejiang 315012,China;China Electric Power Research Institute,Beijing 100055,China)
出处
《浙江电力》
2019年第7期58-62,共5页
Zhejiang Electric Power
基金
国网浙江省电力有限公司科技项目(5211NB170007)
