Study on the Threshold for Deformation Rate of Transmission Tower Foundation in Goaf Subsidence Area
Goaf subsidence will cause such deformations as sliding and settlement of the transmission tower foundations, and even cause tower collapse in serious cases. This paper analyzes the tower inclination and foundation deformation rate of a 500 kV line under different foundation deformation conditions i...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
State Grid Energy Research Institute
2022-12-01
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| Series: | Zhongguo dianli |
| Subjects: | |
| Online Access: | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202209080 |
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| Summary: | Goaf subsidence will cause such deformations as sliding and settlement of the transmission tower foundations, and even cause tower collapse in serious cases. This paper analyzes the tower inclination and foundation deformation rate of a 500 kV line under different foundation deformation conditions in order to study the deformation and failure characteristics of transmission towers in goaf subsidence area. The results show that compared with the tower inclination, the foundation deformation rate can better indicate the status of transmission towers in goaf area; the threshold of the tower foundation deformation rate is 0.5% under the uneven settlement condition, and 1.0% and 2.0% for slight tower damage and serious tower damage respectively under the relative horizontal deformation. The research results of this paper can provide an important reference for the bearing capacity design and the monitoring and evaluation of the tower safety status in the goaf area. |
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| ISSN: | 1004-9649 |