新型输电线路复合基础性能及设计方法研究

Study on the performance and design method of new-types composite foundation used in transmission line projects

合理选择基础型式对保障输电线路安全性、缩短工期、提高经济效益具有重要意义。基于岩石锚杆基础的优良性能,提出了两种岩石锚杆复合基础,分别为钢筋混凝土桩-锚杆复合基础和板式-锚杆复合基础,分别介绍了其结构、原理和适用性。与其他基础型式相比,提出的基础型式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。提出了两种螺旋锚复合基础,可用于软土地区的拉线基础,与现有螺旋锚基础相比,抵抗变形的能力提高,有效降低基础埋深,减少材料量。提出的多种复合基础可为输电线路基础的设计提供参考。

The reasonable selection of foundation types is of great significance for ensuring the safety of transmission lines,shortening construction periods,and improving economic benefits. Based on the advantages of rock bolt foundation,two kinds bolt-composite foundations are proposed,and their structures,principles and applicability are introduced. The proposed rock bolt composite foundation can obviously reduce the construction difficulty of the foundation,shorten the construction period,and reduce the engineering investment. Two kinds screw anchor composite foundations are proposed and can be used for cable foundation in soft soil area. It can improve the capability of resisting deformation and effectively reduce both the depth of foundation and amount of material. The multiple composite foundations proposed in this paper can provide references for the design of transmission line foundations.