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Measurement and evaluation of flows in sewer networks
Haška, Aleš ; Prax,, Petr (referee) ; Raclavský, Jaroslav (advisor)
Measuring flow rate, water surface and rainfall are the crucial inputs for the calibration of the hydraulic model. This bachelor’s thesis presents mathematical models and measuring devices for the sewer networks. This thesis summarises the measuring devices that are currently available and used on the sewer network. Furthermore, theory of random and systematic errors is discussed. In the second section, this theory is implemented in the chosen area for the sewer network in Znojmo. On the 9. 9. 2020, three ultrasonic measuring devices (type ISCO 2150 with AV sensor) and one device for measuring water surface (type IJINUS) were installed in this area. This thesis provides continuous measurements which are then applied for the calibration of the hydraulic model. On completion of this thesis it is necessary to continue to calibrate and verify the model in order to increase accuracy and be more precise.
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Analysis of ageing of selected materials used in sewage systems
Horák, Marek ; Stanko,, Ing Štefan (referee) ; Tlolka, Jan (referee) ; Raclavský, Jaroslav (advisor)
The doctoral thesis deals with analysis of the ageing of concrete and reinforced concrete pipes in sewage systems. The ageing of the sewage system is caused by several reasons, for example material abrasion, chemical and biological corrosion and subsequent static overload sewer construction. One of the common causes of degradation of sewage systems made from materials bonded with cement sealant is biogenic sulphate corrosion. Due to the corrosion the degradation of the pipe walls accelerates, particularly in upper part of the pipe and reduces planned lifetime of the sewage system. There is proposed new ageing analysis monitoring method for observation and evaluation of the loss of thickness of concrete and reinforced concrete pipes, which is caused by biogenic sulphate corrosion. Residual lifetime is calculated from the expected corrosion rate, it`s the loss of wall thickness on the monitored section of the sewer system. There is designed the monitoring system of the loss of wall thickness on the sewage system for practical application of the measurement procedure, which is administrated in cooperation with the BVK, a. s. The thesis uses existing knowledge regarding this subject. We use this information for better understanding of the process of the loss of wall thickness in sewage systems in real time and the posibility to correct and in-time implementation of appropriate operational measures. This should cause the limitation of the degradation process of piping material while extended service life and safe operation in sewage systems within the required time period. Based on the methodology is proposed to determine the residual life of the sewage system and maintenance and rehabilitation can be done more effectively. There is needed to be noted that only long-term monitoring period can bring a better overview of the technical condition of sewage systems in time and thus better and more effective maintenance and rehabilitation, which is related to the effective u
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Time series analysis of the waste water flow in the pressure sewer
Ambrož, Martin ; Beránek, Josef (referee) ; Ručka, Jan (advisor)
This Bachelor Work is describing the time series analysis of outlet from pressure waste water sewerage and detailed statistic data evaluation in village Štěpánovice. In terms of this Work there were realized detailed evaluation of measured time series of flow by 5 minutes in 4 calendar months. Data evaluation was realized by software programme STATISTICA and MS EXCEL with output to determination of an average and maximal daily flow, maximal and minimal hourly flow and coefficient of non-uniformity. At the same time there was found out with statistic probability number of simultaneous running pumps of pressure sewerage of Štěpánovice village.
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Assessment of the technical condition of the sewer network in the village
Shamko, Viktoryia ; Úterský, Michal (referee) ; Hluštík, Petr (advisor)
The bachelor's thesis deals with the assessment of the construction and technical condition of the sewer network in a selected village. The research part is focused on maintenance, types and frequency of failures and inspection techniques to control the condition of the sewer network and propose reconstruction. The works include czech and foreign methodologies for evaluating the condition of the sewer network. In the practical part, a camera inspection of selected sections of the sewer network was performed, followed by a defect coding and evaluation according to two methodologies. Conforming to the assessment of the condition of individual sewer sections and manholes, rehabilitation was proposed.
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Study of rehabilitation of the sewer network of selected parts urbanized area
Voldán, Karel ; Malaník,, Stanislav (referee) ; Raclavský, Jaroslav (advisor)
The aim of the diploma thesis was the elaboration of a study of the rehabilitation of the sewerage network in the part of the town of Znojmo. The work is conceived in the form of accompanying and technical reports. The accompanying report contains a brief description of the interest site, basic information about the sewerage system operator and land data. The technical report contains a description of the individual segments of the sewer network, supplemented by photo documentation of the selected faults located on the selected sections. In addition, the evaluation of the structural state of the sub-sections is carried out here. The following subchapter draws up two hydraulic models and their modifications after the recovery of the sewer system. Another part of the technical report describes possible options for remediation technologies. The last part deals with the conclusions and recommendations for the sewer network operator including a briefly outlined economic page in the selection of remediation technology.
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Assessment of sewerage systems of urban catchments
Velikovská, Kristýna ; Raček, Jakub (referee) ; Raclavský, Jaroslav (advisor)
The bachelor thesis prepares new and present knowledge of assessment of sewerage systems of urban catchments. Theoretical part of the thesis describes classical and contemporary integrated concept of draining waste water from urban catchments. In pursuance of contemporary integrated concept, there is a list of methods, which is used for monitoring conditions of sewer system, making a simulative modeling and solving of elementar tasks in water management. Practical part of the thesis uses gained knowledge to assess sewerage systems of Kladeruby nad Oslavou village. The bachelor thesis is written with respect to valid legislation.
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Cost analysis of building objects
Gregovská, Kateřina ; Zimmermann, Lukáš (referee) ; Výskala, Miloslav (advisor)
The aim of the thesis is to analyse the costs of civil engineering structures in terms of their distribution according to construction or other parts. The first part of the thesis focuses on the cost analysis of sewer lines. The analysis is made on several dozen budgets of real sewer lines, where the technical parameters, economic parameters, parameters on debris generated and costing parameters are compared. From all numerical parameters, the minimum, maximum, average and median values are then evaluated. The next part of the thesis deals with the creation of budgets per 1 mb for excavation in grassed area, road and pavement. The budgets include certain parameters that were found from the previous analysis. The budgets created are then used to determine the change in total cost with changes in excavation depth and pipe diameter. Also, as these parameters change, the labour, the amount of debris removed, backfilling with reused and new soil, and disposal of excavated soil to the landfill are examined. The main purpose is to combine the comparison of all the parameters and find the optimal solutions. In the final stage, the prices of the individual sewer line budgets are compared with the price indicators.
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Study of rehabilitation of the selected part of the sewer network
Novák, Tomáš ; Malaník,, Stanislav (referee) ; Raclavský, Jaroslav (advisor)
The aim of this diploma thesis is a rehabilitation study of the sewer network on Vídeňská street in the city of Brno. The first part of the thesis includes an accompanying review including basic data about the sewage gutter, including the characteristics of the affected area with a detailed description of the geological and hydrogeological rates. This is followed by a technical review, which consists of hydrotechnical calculations and overal summary of the construction-technical condition. The subject of the following part is a proposal and description of several varying solutions for the rehabilitation, including, particularly, trenchless technologies. Further on, all of the proposed variants are evaluated based on technical, economical and environmental impact. Finally, all the observations are summarized and a final recommendation for the way of solving the rehabilitation is carried out.
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Simplified documentation of the sewerage network of the Doubravník
Doušková, Zuzana ; Hluštík, Petr (referee) ; Ručka, Jan (advisor)
Pasport of sewer system in township Doubravník is aim of this bachelor thesis. It was atudied construction of shaft, depth of tributaries and runoffs of pipeline, presence of sediments and balast water and it was assessed the overall condition of sewer and of an objects connected to it during field research. Summary of shafts according to revision sheets, photo dokumentation, posport and evaluation of technical condition of sewer and creation of broader context site plan, sinoptic site plan, detailed site plan and hydrotechnical site plan of sewer network of township Doubravník it work output.
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Study of rehabilitation alternatives of the selected part of the sewerage network
Dvořák, Pavel ; Prax,, Petr (referee) ; Raclavský, Jaroslav (advisor)
The theme of this bachelor thesis is elaboration, evaluation and comparison of alternative ways of solving the reconstruction of a part of a sewer network. For this purpose, this bachelor thesis is divided to two parts. In the first part, there is a researchof the metods used for repair and reconstruction of a sewer network, with the greatest emphasis being placed on methods of renovation, whose goal is to improve the functional and operational properties of the sewer. There are also descriptions of technological procedures, usability area and the basic technical parameters from manufacturers. In the second part, the acquired knowledge is applied in the solution of the reconstruction of the real sewer network, namely in the urban part of Znojmo, Znojmo - město, the residential area of Pražská street. Two solutions have been developed. At first variant only trenchless technologies were considered, in the second variant a recovery of the pipeline by open trench.
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