Sediment Incipient Motion in Sewer with a Bed Deposit

IF 0.8 4区工程技术 Q4 ENGINEERING, CIVIL Teknik Dergi Pub Date : 2020-09-28 DOI:10.18400/tekderg.572529

W. Mohtar, Charles Bong Hin Joo, Aminuddin Ab. Ghani, M. Safari, H. Afan, A. El-shafie

引用次数: 2

Abstract

This paper analyses experimental data on sediment incipient motion with varying sediment bed thickness (of d50, 5, 10 and 24 mm). Sediment particles (with sizes ranging from 0.5 mm to 4.78 mm) were used to evaluate the effect of deposited bed. Variation of shear velocity estimation was investigated where the critical Shields parameter was expressed using bedslope product u∗cb, log-law u∗cl and was extended in terms of critical mean velocity. The critical Shields parameters obtained were significantly lower than the traditional Shields curve when u∗cl was used compared to u∗cb. Higher critical mean velocity is needed for shallower deposits.

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有河床沉积物的下水道中沉积物的起动运动

本文分析了不同沙床厚度（d50、5、10和24mm）的泥沙起动试验数据。沉积物颗粒（尺寸范围为0.5 mm至4.78 mm）用于评估沉积床的影响。研究了剪切速度估计的变化，其中临界希尔兹参数使用床坡积u*cb、对数定律u*cl表示，并根据临界平均速度进行了扩展。与u*cb相比，当使用u*cl时，获得的临界希尔兹参数明显低于传统的希尔兹曲线。较浅的矿床需要更高的临界平均速度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Teknik Dergi 工程技术-工程：土木

自引率

30.80%

发文量

审稿时长

>12 weeks

期刊介绍： The scope of Teknik Dergi is naturally confined with the subjects falling in the area of civil engineering. However, the area of civil engineering has recently been significantly enlarged, even the definition of civil engineering has somewhat changed. Half a century ago, engineering was simply defined as “the art of using and converting the natural resources for the benefit of the mankind”. Today, the same objective is expected to be realised (i) by complying with the desire and expectations of the people concerned and (ii) without wasting the resources and within the sustainability principles. This change has required an interaction between engineering and social and administrative sciences. Some subjects at the borderline between civil engineering and social and administrative sciences have consequently been included in the area of civil engineering. Teknik Dergi defines its scope in line with this understanding. However, it requires the papers falling in the borderline to have a significant component of civil engineering.