Uplift Bearing Capacity of Transmission Tower Foundation in Reinforced Aeolian Sand Using Simplified Model Tests

Ding, Shijun; Cheng, Yong; Zheng, Hong; Feng, Xue; Nie, Zhibao; Yin, Mei

doi:10.1155/2021/6630731

Cited by 3 publications

(1 citation statement)

References 26 publications

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“…Currently, extensive studies focus on the mechanical performances and properties of transmission tower foundation, while the prefabricated structure design and construction of transmission tower foundation have been barely explored, hindering transmission tower lines developing to reach modernization and high technology [1][2][3][4]. Li Wei and his team paid attention to the transmission tower found in saline areas, and they explored the utilization of ultra-high-performance concrete (UHPC) to replace traditional concrete to improve durable proprieties [5].…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study on Plate Splicing of Prefabricated Plate Foundation

Wang,

Gao,

Wang

et al. 2023

Buildings

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Tower foundations are generally of a cast-in-place structure with the disadvantages of low industrialization level and long construction period. The development of prefabricated foundation for transmission line projects is efficient to improve the industrialization level of the construction of tower foundation. In this study, the schemes of post-pouring belt U-shaped steel connection, post-pouring belt lap connection, grouting sleeve connection, and post-tensioned bond prestressed reinforcement connection, which have been widely used on building structures, are newly proposed to apply on plate foundation. The schemes were compared on processing, transporting, on-site constructing and performance. The pseudo-static tests on cast-in-place plate strip, post-pouring belt U-shaped steel connection and post-pouring belt lap connection plate strip were carried out. The results revealed that all the test plate bands were damaged in the bending mode, same as that of ordinary concrete. When U-shaped steel is adopted, more than 90% of the cast-in-place bearing capacity can be reached. The initial stiffness of prefabricated plate strip and cast-in-place strip is basically the same. The load-bearing capacity of the component is relevant to the anchorage length of the U-shaped steel. Although increasing the concrete strength of post-cast belt can improve the ultimate bearing capacity and shorten the construction period, the deformation capacity is reduced. Compared to other connection methods, post-pouring belt U-shaped steel connections have the advantage of simple construction, higher bearing capacity and stability. In summary, the post-pouring belt U-shaped steel connection scheme is recommended.

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Section: Introductionmentioning

confidence: 99%

An Experimental Study on Plate Splicing of Prefabricated Plate Foundation

Wang,

Gao,

Wang

et al. 2023

Buildings

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Centrifuge study on the uplift behavior of spread foundation for transmission tower in sand

Gu,

Tran,

Han

et al. 2024

Can. Geotech. J.

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Realistic simulation of in-situ stresses is an essential consideration in evaluating the bearing capacities of spread foundations. Therefore, this study aimed to investigate the uplift behavior of large spread foundations by performing a series of centrifuge tests. A total of 12 centrifuge test models were constructed considering the variation in the foundation width (3.5–6.5 m), embedment depth ratio (0.67–1.39), and relative density of dry silica sandy soil (40%, 80%). The measured load–displacement curves indicated that the uplift bearing capacity and the corresponding uplift displacement increased with the foundation width at a certain embedment depth ratio. Two sets of empirical equations were proposed by adopting genetic programming to estimate the uplift resistance factor and uplift displacement with consideration of field stress conditions. The proposed equations reasonably matched these parameters under various conditions reported in the literature. Furthermore, a simplified empirical influence zone was proposed on the basis of the measurement of the ground surface displacement. The empirical influence zone, which was a straight line with an inclination angle of ~0.9 times the soil friction angle measured from vertical, could be considered a significant reference for predicting the failure surface of the shallow foundation under uplift loading.

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Operation Status Monitoring of Transmission Tower in Power System based on Data Fusion

Liu

2022

International Journal of Circuits, Systems and Signal Processing

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This paper studies the application of data fusion technology in power system to solve some difficult problems in this complex energy system. A transmission tower identification and bird nest detection method based on corner, line, color and shape features is proposed. Through LSD (Line Segment Detection) and Harris corner detection method, the straight line segment and corner point in the image are extracted respectively. Combined with triangle method, the actual tilt angle of tower is measured; According to the nesting rule of birds in transmission towers, the basic unit segmentation algorithm of transmission towers is proposed, and the basic unit segmentation of transmission towers is realized by using the local maximum of the target pixel row statistical histogram. The algorithm proposed in this paper can effectively solve the problems of on-line measurement of tilt angle of transmission tower and on-line detection of bird's nest, which will lay a theoretical foundation for on-line monitoring of transmission tower status.

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Uplift Bearing Capacity of Transmission Tower Foundation in Reinforced Aeolian Sand Using Simplified Model Tests

Cited by 3 publications

References 26 publications

An Experimental Study on Plate Splicing of Prefabricated Plate Foundation

An Experimental Study on Plate Splicing of Prefabricated Plate Foundation

Centrifuge study on the uplift behavior of spread foundation for transmission tower in sand

Operation Status Monitoring of Transmission Tower in Power System based on Data Fusion

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