Research on safety performance of jacking tower under uneven settlement

Wu, Zongming; Chen, Kongliang

doi:10.1088/1755-1315/768/1/012060

Cited by 2 publications

(1 citation statement)

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“…The study showed that the wind load is the most critical factor in the case of displacement of the foundation in compression or tension and that it has a significant adverse effect on the resistance of the transmission tower under the effect of surface deformation. Wu et al [16] conducted a numerical investigation into the safety performance of a jacking tower during inhomogeneous foundation settlement in a mining area. The results indicated that the stress change in the transmission tower leg was the most significant.…”

Section: Introductionmentioning

confidence: 99%

Study on the Effect of Bolt Slippage and Foundation Settlement on the Bearing Capacity of Tower-Line System

Li,

Liu

2024

IEEE Access

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The bolted joints of angle steel transmission towers experience relative sliding under load, known as bolt slippage. Many studies on the load carrying capacity of transmission towers overlook the boltslippage effect, resulting in inaccurate load carrying capacity analyses. To accurately assess the load carrying capacity of transmission towers, we established two finite element models: one considering bolt slippage and the other ideal rigid frame tower model without considering bolt slippage. We calculated the distribution and stress changes of failure members under static wind load and longitudinal imbalance tension caused by inhomogeneous ice cover and broken lines for both models in different settling modes and amounts. The differences in the bearing capacities of the two models are compared and analyzed based on their ultimate damage patterns. Additionally, the influences of bolt slippage and foundation settlement on the models are examined. This study indicates that bolt slippage has a more significant impact on the deformation of a transmission tower. The tower top displacement of the transmission tower model, when considering bolt slippage, can reach up to 4.05 times that of the ideal rigid frame tower model. This, in turn, affects the damage pattern of the bars. Ignoring the bolt-slippage effect when settling occurs results in an underestimation of the change in the load-bearing capacity of the tower-line system. As the amount of settlement increases, the boltslippage effect causes the load-bearing capacity of the tower-line system to decrease at a slower rate. To accurately calculate the load carrying capacity of a tower-line system, it is necessary to consider the boltslippage effect.INDEX TERMS Bolt slippage, foundation settlement, transmission tower.

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Section: Introductionmentioning

confidence: 99%

Study on the Effect of Bolt Slippage and Foundation Settlement on the Bearing Capacity of Tower-Line System

Li,

Liu

2024

IEEE Access

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Midas-GTS Three-dimensional Numerical Simulation Analysis of the Impact of Deep Excavation on Subway Safety Assessment

Gao,

Yang

2024

Industry Science and Engineering

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Taking the deep foundation pit project of a high-rise building near the subway as an example, this paper analyzes the engineering overview and geological conditions. Based on the subway safety protection and monitoring items and control indicators of the foundation pit project, Midas-GTS software is used to treat the deep foundation pit, surrounding soil, adjacent buildings, and subway engineering as a system, and establish a three-dimensional simulation model of the foundation pit. Complete the simulation of the step-by-step excavation construction process of the foundation pit, and conduct numerical simulation analysis to obtain the horizontal and vertical deformation cloud maps of the subway structure under different working conditions. It Summarizes the maximum vertical and horizontal displacement of the subway, and compare it with the actual monitoring results. The results show that the model established by Midas-GTS is reliable, and the subway safety meets the requirements. The model establishment method and analysis method provide data support for similar projects in the future.

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Research on safety performance of jacking tower under uneven settlement

Cited by 2 publications

References 0 publications

Study on the Effect of Bolt Slippage and Foundation Settlement on the Bearing Capacity of Tower-Line System

Study on the Effect of Bolt Slippage and Foundation Settlement on the Bearing Capacity of Tower-Line System

Midas-GTS Three-dimensional Numerical Simulation Analysis of the Impact of Deep Excavation on Subway Safety Assessment

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