广东电力2025，Vol.38Issue(2)：92-100,9.DOI:10.3969/j.issn.1007-290X.2025.02.011
基于采空塌陷区地表变形模型的输电杆塔承载力性能分析
Analysis of Bearing Capacity of Transmission Tower Based on Surface Deformation Model of Coal Mining Subsidence Area
摘要
Abstract
The transmission line located in the coal mining subsidence area is prone to settlement and deviation of the tower foundation under the action of surface deformation,resulting in the destruction of the tower structure and seriously affecting the safe operation of the transmission lines.In order to study the safety performance of the tower structure against surface deformation in the subsidence area,the theoretical model of the three-dimensional spatial deformation distribution of the ground surface in the coal subsidence area was combined with the refined finite element mechanical model of the tower structure,the failure mechanism of a 500 kV transmission tower under the action of surface deformation was investigated through the nonlinear bearing capacity performance analysis,and the critical inclination of the tower and the limit value of the foundation deformation rate were analyzed.The results show that the dangerous working conditions of the towers in the coal collapse area are mainly three-direction composite displacement conditions.The inclination of the tower and the limit value of the foundation deformation rate when the tower is damaged under the condition of single support displacement are much smaller than those under other working conditions,which are the most unfavorable working conditions.The inclination of the tower is used as the monitoring index,and the safety status of the tower will be conservatively evaluated.This study provides a reference for the design of transmission tower structure and safety monitoring and evaluation in coal mining subsidence area.关键词
采空塌陷区/地表变形/输电杆塔/承载力Key words
coal mining subsidence area/surface deformation/transmission tower/bearing capacity分类
动力与电气工程引用本文复制引用
吴建蓉,张啟黎,刘丹丹,汪大海,王骏骐..基于采空塌陷区地表变形模型的输电杆塔承载力性能分析[J].广东电力,2025,38(2):92-100,9.基金项目
贵州电网有限责任公司电力科学院科技项目(GZKJXM20222507) （GZKJXM20222507）
