Lateral instability and tunnel erosion of a submarine pipeline: competition mechanism

CORC > 力学研究所 > 中国科学院力学研究所 > 流固耦合系统力学重点实验室(2012-)

	Lateral instability and tunnel erosion of a submarine pipeline: competition mechanism
	Shi YM(师玉敏); Gao FP(高福平)
	2018-08-01
会议日期	OCT 21-24, 2016
会议地点	Ocean Univ China, Shandong Prov Key Lab Marine Environm & Geol Engn, Qingdao, PEOPLES R CHINA
关键词	Submarine pipeline Pipeline-soil interaction system Lateral instability Tunnel erosion Competition mechanism
页码	1069-10180
英文摘要	In submarine geological and hydrodynamic environments, either tunnel erosion or lateral instability could be initiated where there is a shallowly embedded pipeline. Unlike previous studies on the tunnel erosion of sand and the lateral instability of pipelines, in this study we performed correlation analyses on the competition mechanism for these two physical processes. By correlating the critical flow velocities of these two processes, the instability envelope for the pipe-soil interaction system is established, which can be described using three key parameters: the embedment-to-diameter ratio, the dimensionless submerged weight of the pipe, and the corresponding critical flow velocity. The analysis procedure is further proposed to first determine the instability mechanism and then the critical velocity of ocean currents. Our parametric study indicates that tunnel erosion is more prone to emerging than lateral instability with small embedment-to-diameter ratio values. With increasing pipeline embedment, tunnel erosion can be suppressed and lateral instability therefore occurs more frequently. Moreover, for light pipelines, lateral instability is more likely to be triggered than tunnel erosion.
会议录	BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
资助机构	National Natural Science Foundation of China [11372319, 11232012]; Strategic Priority Research Program (Type-B) of CAS [XDB22030000]
语种	英语
WOS记录号	WOS:000441525900016
内容类型	会议论文
源URL	[http://dspace.imech.ac.cn/handle/311007/78557]
专题	力学研究所_流固耦合系统力学重点实验室(2012-)
作者单位	1.{Shi, Yu-min、Gao, Fu-ping} Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China 2.{Shi, Yu-min、Gao, Fu-ping} Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Shi YM,Gao FP. Lateral instability and tunnel erosion of a submarine pipeline: competition mechanism[C]. 见:. Ocean Univ China, Shandong Prov Key Lab Marine Environm & Geol Engn, Qingdao, PEOPLES R CHINA. OCT 21-24, 2016.