Study on the Limited Values of Foundation Deformation for a Typical UHV Transmission Tower

Yang, Fengli; Yang, Jing; Zhang, Zifu

doi:10.1109/tpwrd.2010.2045662

Cited by 27 publications

(13 citation statements)

References 1 publication

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“…The leg members and the main members of the tower are simulated by BEAM4 element. The diagonal members are simulated by LINK8 element [8][9]. The secondary members are ignored in the FEA model.…”

Section: Fig1 Outlines Of the Transmission Towermentioning

confidence: 99%

“…Effected by the surface settlement of the goaf, the foundation of the transmission pole and tower will be destroyed by settlement, inclination or slip [1][2][3][4]. Then with the variation of the leg opening and height difference of the transmission tower legs, the transmission tower structures will bear high additional loads, and part body or whole body of the tower structure may break down [6][7][8][9]. Deformations of the foundation have brought serious threat to the safe operation of the power grid.…”

Section: Introductionmentioning

confidence: 99%

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Bearing Capacity Assessment and Maintenance Scheme Optimization on a 220kV Transmission Tower with Foundation Settlement

Yang¹,

Zhang²,

Zhu³

2015

Proceedings of the 2015 4th International Conference on Computer, Mechatronics, Control and Electronic Engineering

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Finite element model of a 220kV transmission tower was established in general software ANSYS. The constrained method of the freedoms of tower foots with foundation settlements was proposed. According to the monitoring data of the non-uniform settlement, the relative settlement values were applied at the tower foots as displacement loads. By considering the relative position relationship between the wind direction and the settlement direction, the foundation settlement case can be combined with the design wind load case and the design ice load case, and structural analysis of the transmission tower totally includes 32 cases. The stresses of the main members and diagonal members at the tower head and tower body were calculated and assessed for different load cases. Optimization on the angle between staying wire and the ground was carried out. The reducing efficiency of stresses by using staying wires for two angles between the staying wires and the ground was compared.

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Section: Fig1 Outlines Of the Transmission Towermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bearing Capacity Assessment and Maintenance Scheme Optimization on a 220kV Transmission Tower with Foundation Settlement

Yang¹,

Zhang²,

Zhu³

2015

Proceedings of the 2015 4th International Conference on Computer, Mechatronics, Control and Electronic Engineering

Self Cite

View full text Add to dashboard Cite

show abstract

“…As the main infrastructure for digesting coal resources and long-distance power transmission in mining areas, the high voltage transmission line towers will inevitably pass through coal mining areas, resulting in a large amount of coal resources being pressed and unable to be exploited [1][2][3]. In view of the special structure and importance of high-voltage towers, how to mine coal safely under a high-voltage tower and protect it is a problem that scholars around the world have been working on [4][5][6][7][8][9][10][11][12]. Early in the 1970s, the material of aggregate backfilled into the gob method was implemented by American scholar T. W. Bernett [13] to enhance the stability of tower foundation and ensure the safe operation of high-voltage tower in the Pittsburgh mining area, to solve the problem of mining under a Ultra High Voltage line of 345 kV.…”

Section: Introductionmentioning

confidence: 99%

Study on Protective Coal Pillar Size Design for Ultra High Voltage Line Tower Mining in Mountain Areas

Guo

2019

Designs

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High voltage line towers in mining areas are sensitive to surface deformation caused by mining. Protective coal pillar design for high voltage towers is one of the commonly-used technical measures. Aiming to solve the coal mining safety problem under the Ultra High Voltage transmission line in Sihe Coal Mine of Shanxi Province, the angle and size of protective coal pillars with the vertical line method were analyzed in this paper. The effect of additional displacement caused by landslide or slippage mining in mountain areas and repeated mining was considered. Based on the principle of the vertical line method, the protective coal pillar range and size were calculated. The amount of coal deposited in coal pillars for high voltage line towers was compared and analyzed between the vertical line method and the linear structure method. The results showed that the angle of critical deformation decreased by 2~10° caused by slippage due to mining in a mountainous area, and the angle in the uphill direction of building decreased more than that in the downhill direction; when multi-seams were mined repeatedly, the angle of critical deformation in the lower seam coal mining was reduced by 5~10° compared with that of the upper seam. The protective coal pillar design with the vertical line method can protect the high voltage line towers more effectively, and the amount of protective coal pillars with the vertical line method was 5.8 million tons less, which avoided the waste of coal resources.

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“…The research indicated that the tower-leg joint slippage has a significant influence on tower behaviour by either reducing the load carrying capacity or significantly increasing the deflections under working loads. Yang et al [13] developed a finite-element model by using the software ANSYS for modelling of a typical 1000 kV transmission tower under different load cases, which included foundation settlement, slip, and inclination combined with normal design loads. The research indicated that the foundation deformations have considerable impacts to reduce load carrying capacity of the transmission towers.…”

Section: Introductionmentioning

confidence: 99%

The behaviour of the power transmission tower subjected to horizontal support’s movements

Shu

Yuan

Huang

et al. 2016

Engineering Structures

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In this paper, two half-scaled test tower models for a typical 110 kV single-circuit power transmission tower were designed and fabricated. The scaled test tower models were tested under the horizontal support's stretching (tensile) and compressive movements with the normal working loading conditions. The deformations of the tested tower models and stresses within the different bracing members were fully measured. A large amount of comprehensive test data was generated. Also a finite element (FE) model using software ANSYS was developed and validated by the test data. The research indicated that the designed half-scaled test tower model can reasonably represent the behaviour of the whole transmission tower under the horizontal support's movements. The magnitude of the stresses was reduced from the bracing members at lower part to the bracing members at higher part of the tower. The effect of the ground surface deformations is more significant on the truss members closed to the supports. Hence, for the design of transmission tower against the horizontal support's movements, it is important to reduce the slenderness of those bracing members.Keywords：Power transmission tower; horizontal support's movements; scaled test tower model; FE analysis.  Develop a FE model using ANSYS for modelling the 110 kV power transmission tower.3

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Study on the Limited Values of Foundation Deformation for a Typical UHV Transmission Tower

Cited by 27 publications

References 1 publication

Bearing Capacity Assessment and Maintenance Scheme Optimization on a 220kV Transmission Tower with Foundation Settlement

Bearing Capacity Assessment and Maintenance Scheme Optimization on a 220kV Transmission Tower with Foundation Settlement

Study on Protective Coal Pillar Size Design for Ultra High Voltage Line Tower Mining in Mountain Areas

The behaviour of the power transmission tower subjected to horizontal support’s movements

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