Abstract
In connection with bad state of existing sewer headers, there is a great need for quick and high-quality cleaning for their further operation. To extend service life of distribution systems, new technologies for their repair and recovery are being developed which makes it possible to ensure their stable functioning and as a result, provision of continuous drinking water supply and sewer disposal to improve quality of life for population. From an economic point of view, extension of service life of distribution systems through development of alternative repair technologies is promising as it will ensure their sustainable operation in conditions of limited financing.The proposed bucket design for cleaning the sewer headers has made it possible to identify the best option when using one design in different conditions.A new design of the bucket was proposed which enables cleaning of the sewage headers either separately in a purely mechanical way or with additional use of the hydraulic method. Thanks to such combined method, it is possible to eliminate dirt which cannot be qualitatively done separately with each of the existing methods in various technical and economic conditions.Purposefulness of application of the proposed method for cleaning sewage headers using the bucket of new design providing a combined method of operation was presented and justified. Examples of application of the new method for cleaning the headers using the bucket of new design were given. The obtained indicators confirm quality of the sewage header cleaning when working in various conditions, both technical (diameter, length and type of the header material, degree, and nature of foulness) and economic (work duration, energy, and water costs).Thanks to the use of this method, 75...85 % dirt elimination in the sewage headers and pipelines have been achieved which confirms its effectiveness and possibility of reducing work duration as well as resource and energy saving in carrying out these works
Highlights
Centralized sewage disposal is a complex combined system consisting of sewer networks, headers, sewer tunnels, treatment facilities of various capacities, etc
It is necessary to have equipment able to remove sediments of various types. This indicates that the subject of studies aimed at high-quality, rapid and cost-effective cleaning of sewage headers of various diameters, purposes, material types and any degree of foulness is of high relevance
Using the example of operating organizations in Kharkiv, it can be observed that the use of traditional methods for cleaning the sewage headers is inferior to the technical and economic indicators proposed by the authors of the alternative method for cleaning the headers using the new bucket design
Summary
Centralized sewage disposal is a complex combined system consisting of sewer networks, headers, sewer tunnels, treatment facilities of various capacities, etc. Growth of the volume of restoration works on underground utilities causes tightening of requirements to ecological safety of construction works during operation and repair of distribution networks in conditions of existing urban housing. Having considered the existing methods of cleaning, it can be concluded that different cleaning methods are used for different pipeline types (diameter, material, purpose). They are effective only for concrete conditions. It is necessary to have equipment able to remove sediments of various types This indicates that the subject of studies aimed at high-quality, rapid and cost-effective cleaning of sewage headers of various diameters, purposes, material types and any degree of foulness is of high relevance
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