输电塔桩-锚杆复合基础方案及经济性分析

DESIGN SCHEME AND ECONOMIC ANALYSIS OF PILE-ANCHOR COMPOSITE FOUNDATION FOR TRANSMISSION TOWER

输电塔基础型式能直接影响输电线路安全性、施工工期和经济效益,研究经济性高、可缩短工期的复合基础性能具有重要意义。文中首先介绍了桩-锚杆复合基础结构、原理和适用性,然后分别采用钢筋混凝土桩-锚杆复合基础和人工挖孔桩基础,对±800kV输电塔基础进行设计。研究结果表明,与普通桩基础相比,桩-锚杆复合基础可以明显降低基础的施工难度,缩短施工周期,减少工程投资。文中采用的复合基础可为输电线路基础的设计提供参考。

The foundation type of transmission tower can directly affect the safety of transmission lines,construction period and economic benefits.Therefore,it is meaningful to study the characteristic and applicability of combined foundation.First,the paper introduced the structural composition,mechanical principle and applicability of pile-anchor composite foundation.Then,in order to study the excellent performance of the Pile-anchor Composite Foundation,the 800kV transmission tower foundation is designed,adopting reinforced concrete pile-anchor composite foundation and ordinary pile foundation respectively.The results show that,compared with ordinary pile foundations,pile-anchor composite foundations can significantly reduce the difficulty of foundation construction,shorten the construction period,and reduce project investment.The composite foundation used in this paper can provide a reference for the design of the transmission line foundation.