（1 中国电力科学研究院有限公司， 北京 100055； 2 北京工业大学， 北京 100124;3 国网北京市电力公司经济技术研究院, 北京 100761）

［摘要］复合防护板基础在采动区输电铁塔中得到了应用，但对这种基础形式的铁塔在基础变位和大风荷载的共同作用下的承载力评估研究较少。通过高精度静力水准测量系统，连续采集了采动区输电铁塔4个塔脚的基础沉降数据。建立了考虑地基土与复合防护板基础共同作用的铁塔承载力分析有限元模型，并依据实测沉降数据，在铁塔塔脚处约束节点施加了不均匀沉降位移，最终对沉降过程中铁塔承载力进行了评估。

［关键词］输电线路； 承载力； 基础沉降； 采动区； 有限元分析

中图分类号：TM753文献标识码：A文章编号：1002-848X(2018)13-0090-06

Bearing capacity estimate based on field test settlement data of steel tower with composite protective plate basement

Zhang Hongjie1, Yang Fengli1, Zhang Xin2, Zhang Xueli1

(1 China Electric Power Research Institute, Beijing 100055， China; 2 Beijing University of Technology, Beijing 100124， China; 3 Economic and Technology Research Institute of Beijing Electric Company, Beijing 100761， China)

Abstract:Composite protective plate basement has been applied in the transmission line above goaf of coal mine, but the research focus on the bearing capacity of the tower with this kind basement especially under the interaction of basement deflection and wind load is less. The settlement data of the tower at its four feet were collected by high precision hydrostatic leveling system. Then the finite element analysis model considering the interaction between the soil and the composite protective plate foundation was formed, and the uneven settlement displacement was imposed at the node of tower feet according to the measured settlement data. Finally, the bearing capacity of the tower in the process of sedimentation was evaluated.

Keywords:transmission line; bearing capacity; base settlement; goaf of coal mine; finite element analysis

作者简介：张宏杰，博士，高级工程师，Email：75790868@qq.com。