Influence of the bottom sills on the flow scouring capacity on the foothill areas of the rivers
Journal Title: Вісник Одеської державної академії будівництва та архітектури - Year 2018, Vol 1, Issue 73
Abstract
The regulation of riverbeds with the help of hydrotechnical constructions is one of the most widespread flood protection methods used on the rivers of the Ukrainian Carpathians. Analysis of a priori information (results of field observations, normative and design documentation) determined the range of changes in the main hydraulic parameters of the water flow and the size of the bottom sills. The purpose of hydraulic studies was to study the influence of bottom sills on the flow scouring capacity on the foothill areas of the rivers during floods. The theoretical studies of the flow scouring capacity were carried out according to the Nikitin's recommendations. During the execution of the experiments, for each height of the bottom sills set corresponding costs and bottom slope, which provides received, according to the scheduling matrix Froude number and full-supply depth. In order to test the suitability of the Nikitin's recommendations for our conditions were met the experimental investigation of sediment particles stability from the existing factors in the case where the flat-bottomed flume decorated with a cement-sand mortar. Investigation of the influence of the acting factors on the diameters of sediment particles resistant to erosion was carried out at a Froude number equal to 0,8 and a full-supply depth of 0,15 m for the case where the bottom was finished with a cement-sand mortar. Analysis of the laboratory studies results has shown that the installation of the bottom sills to an increase in the flow depth and, accordingly, to a decrease in the diameter of the sediment particles forming the bottom, that is, the eroded flow capacity before the bottom sills. The results of laboratory studies have made it possible to determine the effect of the bottom sills on the change in the flow depth ahead of them and on its erosive capacity. The results obtained are basic for the development of a methodology for the designing bottom sills to stop deep erosion on the foothill areas of the rivers.
Authors and Affiliations
L. R. , Yasinska, O. V. , Bezusyak, L. O. , Tokar, I. E. , Kosynska
Keywords
Related Articles
- EP ID EP513801
- DOI -
- Views 130
- Downloads 0
Usage pattern of complex additives based on polycarboxylates in road concrete technology
Cement concrete for roads with a hard coating using the complex admixture on the base of polycarboxylates was developed. It is shown that the composition using and air-entraining cement concrete superplasticizer admixtur...
Composition effect on the strength of modified expanded clay lightweight concrete
The effect of modified expanded clay lightweight concrete on its strength is investigated. In the conducted on the optimal plan experiment, the four factors of the composition varied: amount of sulfate-resistant Portland...
Increasing the stability of asphalt concrete coating to formation of rutting
The article considers the issues of increasing the stability of the asphalt-concrete coating to the formation of rutting. In recent years, the load on road surfaces has increased. It is known that the quality of bitumen...
The pipeline monitoring
Experience of monitoring of high pressure gas pipeline laid on steep slope area above the underground workings is outlined. For research the geodetic reference network consisting of four points was established on the sit...
Influence of preliminary cooling of waste gases on energy efficiency of thermal-transformational heat supply system
The authors proposed a new scheme and developed a functional device for a basic system of selecting the heat from waste gases from rotary kilns for industrial and municipal heat supply, which is distinguished by patent n...