Deep-sea pipelines play a pivotal role in seabed mineral resource development,global energy and resource supply provision,network communication,and environmental protection.However,the placement of these pipelines on ...Deep-sea pipelines play a pivotal role in seabed mineral resource development,global energy and resource supply provision,network communication,and environmental protection.However,the placement of these pipelines on the seabed surface exposes them to potential risks arising from the complex deep-sea hydrodynamic and geological environment,particularly submarine slides.Historical incidents have highlighted the substantial damage to pipelines due to slides.Specifically,deep-sea fluidized slides(in a debris/mud flow or turbidity current physical state),characterized by high speed,pose a significant threat.Accurately assessing the impact forces exerted on pipelines by fluidized submarine slides is crucial for ensuring pipeline safety.This study aimed to provide a comprehensive overview of recent advancements in understanding pipeline impact forces caused by fluidized deep-sea slides,thereby identifying key factors and corresponding mechanisms that influence pipeline impact forces.These factors include the velocity,density,and shear behavior of deep-sea fluidized slides,as well as the geometry,stiffness,self-weight,and mechanical model of pipelines.Additionally,the interface contact conditions and spatial relations were examined within the context of deep-sea slides and their interactions with pipelines.Building upon a thorough review of these achievements,future directions were proposed for assessing and characterizing the key factors affecting slide impact loading on pipelines.A comprehensive understanding of these results is essential for the sustainable development of deep-sea pipeline projects associated with seabed resource development and the implementation of disaster prevention measures.展开更多
本文基于美国陆军工程师兵团EM 1110-2-6053中提出的水工建筑物抗震性能需求能力比(DCR,demand to capacity ratio)评价方法,对某水电站沉砂池综合抗震性能进行了评价。结果表明,在OBE下,沉砂池右边墙的抗剪性能、抗弯性能、抗滑动稳定...本文基于美国陆军工程师兵团EM 1110-2-6053中提出的水工建筑物抗震性能需求能力比(DCR,demand to capacity ratio)评价方法,对某水电站沉砂池综合抗震性能进行了评价。结果表明,在OBE下,沉砂池右边墙的抗剪性能、抗弯性能、抗滑动稳定和抗倾覆稳定性均能满足设计要求。而在MDE下,尽管沉砂池截面抗弯性能良好,但其右边墙的抗剪性能难以满足设计要求,需要对结构断面或配筋进行调整;且其可能发生滑动失稳和倾覆失稳破坏,需要进一步开展非线性动力分析。展开更多
基金supported by the opening fund of State Key Laboratory of Coastal and Offshore Engineering at Dalian University of Technology(No.LP2310)the opening fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection at Chengdu University of Technology(No.SKLGP2023K001)+2 种基金the Shandong Provincial Key Laboratory of Ocean Engineering with grant at Ocean University of China(No.kloe200301)the National Natural Science Foundation of China(Nos.42022052,42077272 and 52108337)the Science and Technology Innovation Serve Project of Wenzhou Association for Science and Technology(No.KJFW65).
文摘Deep-sea pipelines play a pivotal role in seabed mineral resource development,global energy and resource supply provision,network communication,and environmental protection.However,the placement of these pipelines on the seabed surface exposes them to potential risks arising from the complex deep-sea hydrodynamic and geological environment,particularly submarine slides.Historical incidents have highlighted the substantial damage to pipelines due to slides.Specifically,deep-sea fluidized slides(in a debris/mud flow or turbidity current physical state),characterized by high speed,pose a significant threat.Accurately assessing the impact forces exerted on pipelines by fluidized submarine slides is crucial for ensuring pipeline safety.This study aimed to provide a comprehensive overview of recent advancements in understanding pipeline impact forces caused by fluidized deep-sea slides,thereby identifying key factors and corresponding mechanisms that influence pipeline impact forces.These factors include the velocity,density,and shear behavior of deep-sea fluidized slides,as well as the geometry,stiffness,self-weight,and mechanical model of pipelines.Additionally,the interface contact conditions and spatial relations were examined within the context of deep-sea slides and their interactions with pipelines.Building upon a thorough review of these achievements,future directions were proposed for assessing and characterizing the key factors affecting slide impact loading on pipelines.A comprehensive understanding of these results is essential for the sustainable development of deep-sea pipeline projects associated with seabed resource development and the implementation of disaster prevention measures.
文摘本文基于美国陆军工程师兵团EM 1110-2-6053中提出的水工建筑物抗震性能需求能力比(DCR,demand to capacity ratio)评价方法,对某水电站沉砂池综合抗震性能进行了评价。结果表明,在OBE下,沉砂池右边墙的抗剪性能、抗弯性能、抗滑动稳定和抗倾覆稳定性均能满足设计要求。而在MDE下,尽管沉砂池截面抗弯性能良好,但其右边墙的抗剪性能难以满足设计要求,需要对结构断面或配筋进行调整;且其可能发生滑动失稳和倾覆失稳破坏,需要进一步开展非线性动力分析。
