Field Installation Tests of Monopod Suction Pile and Tripod Suction Buckets

Kwag, Daejin; Oh, Myounghak; Kwon, Oh Kyung; Bang, S.

doi:10.1115/omae2013-10100

Cited by 6 publications

(3 citation statements)

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“…However, it has been increasingly used in offshore construction owing to its various advantages that include applicability to most soils, except for extremely hard and soft ground; less noise than other construction methods, such as pile driving and concrete placement; less construction time; and ease of use in deep water. Recently, many studies have been conducted on enhancing foundations for offshore structures, such as offshore wind turbines [6,7], temporary structures for the construction of offshore bridges, and substructures of meteorological towers [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Automatic Verticality Monitoring and Securing System for Large Circular Steel Pipes

Koo,

Park,

et al. 2023

Electronics

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Securing the verticality of foundations is a crucial factor for ensuring safety in offshore construction. The repeated intrusion-pulling method is generally used to ensure verticality in suction bucket foundation construction processes. However, it relies heavily on the experience and skills of field workers and is relatively time-consuming. To address this problem, we propose an automatic verticality securing system for large circular steel pipes based on a verticality monitoring system. This system adjusts cables at locations where verticality correction is required without changing the existing suction pile–penetration–construction process. It includes a monitoring component that provides real-time data on pipe alignment and an automatic lifting cable control system that maintains perpendicularity using data acquired from the monitoring system. The monitoring system comprises a sensor, an embedded controller, and a display program that displays the vertical information of circular steel pipes. The automatic lifting cable control system includes a controller with an algorithm for adjusting the length of the actuator. We showed that the system operates satisfactorily and secures the verticality of less than 0.2° in the suction bucket-based model experiment. Furthermore, the testbed experimental results show that our monitoring system can efficiently measure verticality information in real time.

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Section: Introductionmentioning

confidence: 99%

Automatic Verticality Monitoring and Securing System for Large Circular Steel Pipes

Koo,

Park,

et al. 2023

Electronics

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“…반면, 서남해안 해저지반의 많은 지역이 상당 히 두꺼운 연약한 퇴적층으로 조성되어 있어, 이들 형식을 그 대로 적용하기는 한계를 가진다. 이에 대한 대안으로 다양한 신형식 지지구조물형식이 연구되고 제시되어 왔다 (Houlsby and Byrne, 2000;Byrne and Houslby, 2003;Houlsby et al, 2005;Zhu et al, 2011;Choo et al, 2012;Kwag et al, 2013;Kim et al, 2014a;Shin et al, 2014). 이중에서 석션기 초는 안정성과 효율성을 가진 경제적인 지지구조물로 주목받 아왔다 (Houlsby et al, 2005;LeBlanc et al, 2010;Zhu et al, 2011;Hung and Kim, 2014;Kim et al, 2014a (Tjelta, 2001;Sparrevik, 2002;Anderson et al, 2005;Randolph and House, 2002 (Wang, et al, 2006;Zhang et al, 2011).…”

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Effect of Skirt Length on Behavior of Suction Foundations for Offshore Wind Turbines Installed in Dense Sand Subjected to Earthquake Loadings

Choo¹,

Olalo²,

Bae³

2016

J Korean Soc Coast Ocean Eng

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This study aims to analyze seismic responses of suction foundations for offshore wind turbine. For this purpose, dynamic centrifuge model tests were carried out. The skirt length of the suction foundation is a critical element for bearing mechanism against environmental loads. Thus, dynamic centrifuge model tests were performed and analyzed for three suction foundation models with the ratios of skirt length to suction foundation diameter of 0.5, 0.75, and 1 installed in dense sand. As results, the acceleration amplification at the suction foundation, residual settlement, and residual tilting angle were compared.

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“…Suction caisson, also known as "suction bucket", is a highly competitive alternative for offshore wind foundation due to many advantages compared to the conventional offshore foundations: quick installation, no heavy driving equipment for penetration and no hammering noise (Byrne and Houlsby, 2003;Zhu et al, 2011;Choo et al, 2012;Kwag et al, 2013;Kim et al, 2014a). When the suction caisson foundation is used as a fixed structure installed on the coast, its seismic response should be taken into account as a part of the design procedure.…”

Section: Introductionmentioning

confidence: 99%