PREDICTION OF MAXIMUM SCOUR DEPTH AT SUBMARINE PIPELINES

被引:108
作者
CHIEW, YM
机构
[1] School of Civ. and Struct. Engrg., Nanyang Tech. Inst., Singapore, 2263, Nanyang Avenue
来源
JOURNAL OF HYDRAULIC ENGINEERING-ASCE | 1991年 / 117卷 / 04期
关键词
D O I
10.1061/(ASCE)0733-9429(1991)117:4(452)
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
This paper examines and reviews published results relating to local scour around submarine pipelines. It highlights the limitations of existing methods for estimating scour depth at the pipeline. Based on experimental results, the study proposes an empirical function relating the amount of gap flow through the scour hole for given flow conditions. With the aid of this function, it is possible to predict the maximum scour depth at submarine pipelines for given flow and geometric boundary conditions. Published results suggest that the maximum equilibrium scour depth occurs when the pipeline is just lying on a plane bed and subjected to a pure unidirectional current. The undisturbed bed shear stress is equal to the critical shear stress for sediment entrainment. This condition implies that there is no general sediment transport away from the pipeline. The predicted maximum scour depth using the iterative method proposed in this study compares well with experimental results.
引用
收藏
页码:452 / 466
页数:15
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