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PL
Artykuł zawiera informacje na temat prawidłowego projektowania, budowy i późniejszego utrzymania poszczególnych elementów spójnego, kompleksowego systemu odwodnienia obiektów mostowych. Dodatkowo poruszono zagadnienia związane z estetyką poszczególnych elementów opisywanego systemu odwodnienia, który ma wpływ na ogólną estetykę całego obiektu mostowego.
EN
The article includes information on the proper design, construction and subsequent maintenance of the particular elements of an integral, comprehensive bridge drainage system. Moreover, issues related to the aesthetics of the specific components of the above mentioned system that influence the general aesthetics of the whole bridge structure have been addressed.
3
Content available remote Największy na świecie kolektor deszczowy z funkcją podziemnej autostrady
PL
W Kuala Lumpur w Malezji realizowany jest unikalny projekt polegający na umieszczeniu w jednej rurze podziemnego kolektora dwóch jezdni drogi, jednej nad drugą. Podczas bardzo dużych opadów, 1-2 razy w roku, droga będzie zamykana by przepuścić wodę całym przekrojem rury.
EN
Unique project with idea of placing in one tube of underground water collector two road carriageways, one over second, are implemented in Kuala Lumpur in Malaysia. During very high storm, 1-2 times a year, road will be closed in order to pass the water in the whole cross-section of the tube.
4
Content available remote Projekt SMART
EN
Presented are the assumptions for a mathematical model which describes the unsteady flow of surface runoff and the unsteady discharge of storm water from the sewer.Surface runoff is characterized in terms of the kinematic wave equation.Since it has been assumed that the wastewater stream in the sewer follows gradually varied,one-dimensional,free-surface flow pattern, it is possible to make use of the Saint-Venant equations in thier full formulation.The equations of the mathematical model ( appropriately determined initial and boundary conditions) are solved by a finite difference numerical method.The algorithm of the solution has been coded as a computer programme (ALFA),thus making it possible not only to simulate the operation of the sewer system under arbitrary feeding conditions,but also to perform technical and cost-effectiveness analyses.Considered are two flow patterns in the storm sewer.In pattern (A)rainfall of a time-variable intensity is assumed to move downstream (in the direction of the direction of the outflow cross-section ) at a constant velocity.In pattern (B),reinwater is assumed to trawel upstream at the same velocity.When formulating the numerical example,consideration has been given to the geometry,slope and pipe roughness of the sewer,as well as to relevant parameters of the adjacent catchment area.The distributions of effective rainfall intensity for every part of the catchment is determined for pattern (A) and pattern (B).Computations are performed using the ALFA programme.Some of the results obtained are presented in graphical form to visualize how the storm water level in the cross-sections of the sewer varies with time forn the flow patterns considered.
7
Content available remote Działanie kolektora deszczowego przy zmianie warunków jego zasilania
EN
One of the possibilities of application of the computer programme ALFA is shown in the paper. The numerical example has been described. It was assumed, that the hydrograms of waste waters inflow to the sewer sre changed for some reasons and the analyse of the operation of the storm sewer in new conditions is needed. The programme ALFA was used for computation and obtained results have been presented.
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