RESEARCH ARTICLE
Research on Anti-Foundation-Displacement Performance and Reliability Assessment of 500 kV Transmission Tower in Mining Subsidence Area
Qianjin Shu*, 1, Guanglin Yuan1, Yunfei Zhang2, Guangli Guo3
Article Information
Identifiers and Pagination:
Year: 2011Volume: 5
First Page: 87
Last Page: 92
Publisher ID: TOCIEJ-5-87
DOI: 10.2174/1874149501105010087
Article History:
Received Date: 7/9/2010Revision Received Date: 21/11/2010
Acceptance Date: 3/12/2010
Electronic publication date: 29/4/2011
Collection year: 2011
open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Abstract
The performance of resisting foundation displacement of typical single return circuit and double return circuit transmission towers under all kinds of load conditions including foundation horizontal displacement, foundation vertical uneven downward displacement were analyzed by finite element modeling. Results showed that stability failure of single steel angle represents tower’s limit state under foundation displacement. The corresponding foundation displacement limits were calculated. And the towers’ reliability were assessed by comparing the calculated earth surface deformation in advance to the towers’ earth surface deformation permissibility. Result indicates that tower does not fail when foundation displacements are smaller than 0.5% of tower root distance. The assessment result revealed that under coal mining deformation conditions, complex foundation and measures adjusting the length of bolts between towers’ legs and foundations can ensure all object towers’ safety. The complex foundation is more effective than single foundation in resisting coal mining deformation.