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UDC 628.147.2:65.012.2
Khramenkov S. V., Orlov V. А., Primin Oleg
Computerized support of the Moscow water pipeline renovation scheduling strategy
Summary
Comprehensive evaluation of the expediency criteria of pipeline relaying or renovating involves a lot of calculations, large bulk of operating and diagnostic data processing. It becomes possible only if computer-aided programs are available that provide for a basis for a valid assessment of the pipeline renovation project and scope of work. Scheduling Pipe Renovation program has been designed by MosvodokanalNIIproject OJSC in cooperation with Mosvodokanal MPUE and used for Moscow water pipeline maintenance.
Key words
reconstruction , water supply , reliability , pipeline , maintenance , environmental risks , water leaks
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UDC 628.144:532.542/.543
Prodous O. A., Terekhov L. D., Smolin E. S.
Analysis of the international and domestic computing dependencies for the calculation of the head loss in pipelines made of polymer materials
Summary
The computing dependencies regulated by the domestic and international standards for the hydraulic calculation of pressure pipes made of polymer materials are considered. The design values of hydraulic characteristics of 600 mm diameter pressure polyethylene pipes obtained at a test installation (600 mm diameter pipe lined with polyethylene, 35.04 m section length) were compared. The comparative analysis of the computing dependencies used both in Russia and abroad for calculating the head loss in the pipes made of polymer materials was carried out. The priority sequence of using the international and domestic dependencies for hydraulic calculations of pipelines made of polymer materials is recommended.
Key words
pipeline , polymeric materials , hydraulic design , pressure losses , calculation formulae , analysis of computing dependencies
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UDC 628.144.62-192
Primin Oleg
Analysis of factors producing an effect on the integrity and environmental safety of water distribution networks
Summary
The environmentally safe construction and operation of public utilities facilitates to a large extent the sustainable development of cities and communities. Pipelines of a water distribution network can be referred to the basic elements of the municipal water supply system and, as operational practice shows, are most vulnerable. Transition to market economy, reforming housing and public utilities under conditions of wear and aging of engineering life support systems of the Russian cities and communities, lack of material and financial resources for their renovation have significantly exacerbated the ecological situation in the country. Unsatisfactory condition of the water supplying pipelines in most of the cities, imperfect operation management result in numerous pipeline failures and, consequently, in material and environmental damages caused by the changing hydrogeological territorial regime, underflooding, raw wastewater discharge into water bodies and surface spills, increased soil corrosiveness etc. In that context supplying the population with sufficient amount of drinking water of the required quality and environmental safety of water use have been most urgent issues in Russia. The integrity and environmental safety have been the main requirements set to the public water supply pipelines. The results of studying the assessment and analysis of the factors effecting the integrity and environmental safety of the water distribution pipelines are presented. The assessment and analysis of the external factors (parameters, characteristics) that can produce a significant effect on both the pipe integrity and environmental safety and their efficient lifetime are the basis of developing the measures on improving the reliability of the municipal water distribution pipelines.
Key words
water supply network , reliability , pipeline , ecological safety , insulating coating , cathodic protection
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UDC 628.147:62-192
Shushkevich E. V., Menshchikova O. A., Generalov N. S., Ivanov Ye. V.
Introducing innovative materials and technologies in the water distribution network
Summary
A review of the advanced innovative materials and technologies used in reconstruction and operation of the water distribution network is presented. The basic causes of pipeline failure are considered, the advanced technologies and equipment that contribute to extending the pipeline operational life are described. A comprehensive analysis of the newly developed corrosion-resistive coatings, socket joints is given alongside with the results of retrofitting energy-independent systems of monitoring water distribution network parameters based on multiparameter sensors and remote control of the shutoff and control valves. The experience of MPUE Mosvodokanal in using innovative trenchless technologies of pipeline repair and rehabilitation is systemized.
Key words
water supply network , pipeline , computerization , trenchless method of repair , water quality monitoring
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UDC 628.14.001.57
Shishov S. Yu., Ivanov Vlad. Mikh., Bychkov D. A., Nezamaev E. A.
Hydraulic model for monitoring and control of the Tumen public water supply operation
Summary
Geographic information technologies allow facilitating significantly the task of operating the public water supply of an urban. In Tumen designing a hydraulic model of the water distribution network operation on the basis of «Zulu» program-design package has been carried out since 2006. The system is aiming at improving the quality, reliability and energy efficiency of the water supply and distribution operation. At the initial stage an integrated design scheme of the major water mains was developed. This hydraulic model provided for developing and implementing a number of important measures for the optimization of the water distribution network operation mode in Tumen. To improve the accuracy the model was further detalized by adding pipelines to every customer into the design scheme. At the same time pipeline certification started with recording results in the geographic information system. Calibration of the detailed hydraulic model was carried out on the basis of the information obtained from 530 pressure gauges installed at the residential service connections. The carried out calculations were noted for high accuracy (to 0.3 atm deviation). With the help of the detailed hydraulic model the following tasks are being accomplished in «Tumen Vodokanal» LLC: changing the operation modes of the pumping stations, planning water mains outage, determining technical possibility of connecting new objects. Basing on the calculations in 2011 a project of installing 24 pressure control valves in the water distribution network was implemented. The geographic information system is noted for the function of using map layers of tile-servers in Internet, as well as for possible data storage and failure analysis. The information obtained in the process of using the detailed hydraulic model is widely used by the distribution network operating service of «Tumen Vodokanal» LLC for the team task description and determining gate valve closure pattern.
Key words
pipeline , pump , pressure regulator , geoinformation system , control points in the distribution network , hydraulic model , certification
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UDC 628.2:621.644.073
DOI 10.35776/VST.2024.10.07
Zakharov Iu. S.
Classification of gravity sewers at the pipeline rehabilitation
with flexible polymer liner
Summary
One of the dynamically developing areas of the construction industry since the early nineties of the last century has been the rehabilitation of damaged underground pipelines using «pipe-in-pipe» technologies. The rehabilitated pipeline shall meet the requirements for new pipelines, i. e. be hermetic, environmentally safe and safe in service, resistant to static loads, to transported wastewater, to abrasion and loads during water blasting. Based on the static calculation performed when selecting the parameters of a new pipe for pipeline rehabilitation, it is necessary to confirm the bearing capacity, serviceability and steadystate stability of the pipeline after rehabilitation, as well as, if necessary, the impossibility of soil collapse (sinking). A clear definition of the required wall thickness of a new polymer pipe, the choice of a suitable technology for pipeline rehabilitation and the service life of the pipeline after rehabilitation largely depend on the correct classification of the pipeline being restored. Therefore, in order to perform a high-quality static calculation, minimize errors in selecting the design and parameters of a flexible polymer liner, as also to ensure long-term trouble-free operation of the «new pipe – pipeline – soil» system, a visual inspection of the pipeline being restored should be carefully carried out in accordance with the classification given in the article.
Key words
pipeline , water disposal system , rehabilitation , flexible polymer liner , statistic calculations
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UDC 621.644.2
Orlov V. А., Averkeyev I. A., Khrenov K. E.
Modeling strength properties of inner pipe protective linings
Summary
Lately polymeric spray applied protective linings have been widely used for rehabilitation of old water supply pipelines. Investigations of physical and mechanical properties of Scotchkote™ 169HB polymeric lining spray applied on the inner surface of old water pipes were carried out. In the process of experimental studies Instron 3345 electromechanical tensile testing machine and Ansys software package of finite element analysis were used. In the process of testing a stress model of two-layer pipe structure based on steel pipeline and polymeric lining the following results were drawn: maximum tensile strength of lining 14.95 MPa; flexural yield stress 13.92 MPa; maximum breaking extension 25.57 mm (~ 13%). The strength properties of a steel pipeline with perforation damage were investigated in the process of trenchless rehabilitation with the use of Scotchkote™ 169HB inner lining within the operation range of 0–50 years at 20 °С. With hole diameter enlargement over time to 20 mm the system strength criterion has the value more than 1; herewith the two-layer structure will be age-resistant while providing for the required strength properties for 50 year operation. If the hole diameter is more than 20 mm the strength criterion values less than 1 will be observed which does not ensure the required strength properties of the two-layer pipe structure. The relationships for calculating pipeline strength after the lining application as well as the model itself constructed in the system of Ansys finite element analysis are suggested. This will provide for predicting the behavior of «pipe + Scotchkote™ 169HB protective lining» two-layer structure for various pipeline operating conditions.
Key words
pipeline , trenchless renovation , polymeric lining , physical-mechanical property , computer modeling
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UDC 628.24:62-192
Alekseev M. I., Yermolin Yu. A.
Reliable operation of wastewater collection systems and ways of its improvement
Summary
Characteristics of the three constituents of a municipal wastewater collection system, i.e. structural, design and operational are presented. Their impact on the reliable operation of the entire wastewater collection system is discussed. The reasons of reliability degradation of each of the constituents are analyzed. Based on the analytical results the specific features are considered and a number of administrative and technical measures to improve the reliability of the wastewater collection system both at the design stage and in the process of operation are suggested.
Key words
reliability , pipeline , pump , water disposal system , shut-off and control valves , operation efficiency
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UDC 628.28
DOI 10.35776/VST.2023.04.04
Maslov Andrei
Reliable sealing cushions for big sewers
Summary
One of the most important measures for the successful repair works is the reliable blocking of the pipeline for the repair period. The use of LAMPE pneumatic sealing cushions for this purpose in large-diameter sewer networks has shown their high efficiency. LAMPE sealing cushions are fundamentally different from rubber plugs by the material they are made of and by the technologies of their manufacture. As a result, they are lighter, easily pass through a conventional hatch, do not require additional blocking, they are maintainable, and have an unlimited service life. All of these advantages make it possible to quickly and reliably cut off the failed section of the pipeline for the period of repair works and, having ensured their absolute safety, significantly reduce the time for eliminating the failure.
аварии.
Key words
pipeline , sewerage network , LAMPE pneumatic sealing cushion , LAMPE pneumatic lift
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УДК 628.17.001.4
Primin Oleg, Aliferenkov A. D., Otstavnov A. A.
Regulatory support of ductile iron pipe use in Russia
Summary
The integrity and environmental safety are among basic requirements imposed to the municipal water and wastewater systems. An appropriate choice of pipe material is of primary importance for ensuring water transportation pipeline integrity. For many years steel and cast iron have been the main pipe materials used in public water supply in Russia. Lately ductile iron pipes widely used overseas and in Russia, in the Moscow water supply system, in particular, have been competing with steel (metal) pipes. The wider use of ductile iron pipes in drinking water supply until recently was restrained by the lack of the proper regulatory framework, including general lack of instructions on the use of ductile iron pipes in Construction Rules 31.13330.2012 «Water supply. Public utilities» (Revised edition of Construction rules and regulations 2.04.02-84*). The information on these pipes and on the introduction of amendments to Construction Rules 31.13330.2012 related to the use in water supply systems, and also amendments to Construction Rules 66.13330.2011 «Design, construction pressure water pipelines and sewers with the use ductile iron pipes» in relation to their use in soft and subsiding soil is presented. The amendments were approved by the Ministry of Housing and Construction of Russia and put into force on April 30, 2015.
Key words
reliability , strength , pipeline , water and wastewater systems , ductile iron , set of rules
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DOI 10.35776/VST.2021.03.01
UDC 628.2
Primin Oleg
On the development of Technical Regulations on the safety of water distribution and sewer networks of public water supply and wastewater disposal systems (for discussion)
Summary
The issues of reliability of pipelines of water and sewer networks of Russian cities and settlements are considered. Considerations (by way of discussion) on the need for the development and adoption of Technical Regulations on the safety of water and sewer networks of public water supply and wastewater disposal systems are presented. The Technical Regulations will establish the requirements to water and sewer networks that will be mandatory for use and compliance on the territory of the Russian Federation. It is noted that the water industry in Russia is currently lacking a uniform system developed on the basis of the practice of applying mandatory requirements to pipe products used in water and sewer networks and their mandatory certification. The scope of application of such Technical Regulations is proposed, i. e. networks of public systems of cold water supply and wastewater disposal (sewerage) at all stages of their life cycle, as well as materials and articles, pipes, fittings, manholes and related processes of design, construction, operation, maintenance, current repairs and overhaul works, conservation and abandonment of water supply and sewer networks.
Key words
reliability , pipeline , water supply and sewerage networks , water and wastewater management , regulations , requirements
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UDC 628.214:532.595.2
Primin Oleg
Ensuring reliable and environmentally safe operation of pressure sewers
Summary
Surge in a pipeline is a significant factor that is affecting the environmental safety and reliability of the public wastewater disposal system. In case of an emerging surge noticeable pressure fluctuations occur that could cause pipeline burst and damage of the related hydraulic and mechanical equipment (pumps, valves etc.). It results in sewage spills, material and environmental losses. The main causes of an emerging surge in municipal pressure sewers can be as follows: mains failure, imperfections of the control schemes of the main pumping units at the sewage pumping stations. To ensure reliable operation of the pumping stations the use of hydromechanical devices as well as of high-speed emergency switching on automatic and protection devices including controlled electric drives and softstarters is provided. It was determined that in wastewater disposal practice hydromechanical fittings that reduce the surge effect shall be used. To prevent from surge water discharge through bypasses with installing safety valves and hydraulic tanks is used. In addition to wastewater discharge from pumping stations pressure sewers of intricate shape shall be equipped with air intake and relief devices at the intermediate points. It is found that surges in operation of sewage pumping stations can be eliminated by improving the reliability of external power supply by establishing truly independent power sources, designing combined power supply schemes, high-speed automatic switchover devices in 6–10 kV switchboards of big stations.
Key words
pipeline , sewerage , pumping station , water hammer , ecological safety
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DOI 10.35776/VST.2022.04.07
UDC 621.644
Chupin R. V., Morozova Svetlana, Bober Viktor
Substantiation of the diameters of pipelines of water supply
and wastewater disposal systems based on minimizing the costs of their life cycle
Summary
While designing urban water supply and wastewater disposal systems, substantiating the diameter of pipelines, the flow rate of water and wastewater is required. The existing approaches and regulatory requirements set forth in CP 31.13330.2012 are based, among other things, on the economic indicators calculated on the basis of the overhead costs for the construction and operation of water supply and wastewater disposal systems. At the same time, according to GOST R 587885-2019, the choice of a design option should be based on the life cycle costs of these systems. A method is proposed for calculating the optimal values of pipe diameters and the velocity of water and waste liquid in pipelines based on the costs of their life cycle. The conducted numerical experiments showed that the optimal values of the velocity depend on the flow rate of water and waste liquid, the cost of electricity and the number of years of the life cycle of water supply and wastewater disposal systems. New formulas are proposed for calculating economically justified values of the velocity of water and wastewater for steel, cast iron and polyethylene pipes.
Key words
pipeline , water and wastewater systems , minimization of life cycle costs , optimal values of water and wastewater velocity and pipe diameters
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UDC 628.2:621.644.073
DOI 10.35776/VST.2024.12.08
Zakharov Iu. S.
Determining the wall thickness of flexible polymer liners for the rehabilitation of pipelines of the state class I
Summary
The wall thickness is one of the main parameters that determine both the service life of a gravity sewer pipeline subject to rehabilitation with the use of flexible polymer liners, and the economic efficiency of repair and rehabilitation activities. The wall thickness of a flexible polymer liner is determined based on a static calculation with the algorithm depending on the condition of the pipeline subject to rehabilitation and the loads acting on it. At present, special software developed by foreign companies is used to calculate the wall thickness of a flexible polymer liner. A method for static calculation of flexible polymer liners cured inside a pipeline is proposed that while using tables and graphs allows determining the liner wall thickness during the rehabilitation of a state class I pipeline, provided the main load acting on the «new polymer pipe – pipeline» system is groundwater pressure.
Key words
pipeline , water disposal system , rehabilitation , flexible polymer liner , static calculation
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UDC 628.2:621.644.073
DOI 10.35776/VST.2024.12.09
Zakharov Iu. S.
Determining the wall thickness of flexible polymer liners for the rehabilitation of pipelines of the state class II
Summary
Once gravity sewer pipelines are put into operation, longitudinal cracks may appear in the pipes after a relatively short period of time caused by the low quality of pipe products and violation of the construction technology. Pipelines with longitudinal cracks (state class II or III) can be rehabilitated using flexible polymer liner, provided that the «pipeline – soil» system is statically stable. A method for estimating the static stability of the «pipeline – soil» system is given. Taking into account the properties of the soil, backfilling and ovalization of the pipeline, the main loads acting on a new polymer pipe during the rehabilitation of pipelines with longitudinal cracks (condition class II) are determined. An algorithm is proposed for calculating the wall thickness of a flexible polymer liner for the rehabilitation of pipelines of the above-mentioned state class depending on the actual loads. As an alternative to using foreign specialized software, a method is proposed for calculating the wall thickness of a flexible polymer liner that provides for using tables and graphs to determine the wall thickness of the liner for the rehabilitation of state class II pipeline on exposure to the soil pressure, groundwater and transport loads.
Key words
pipeline , water disposal system , rehabilitation , flexible polymer liner , static calculation
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UDC 628.156
Khrenov K. E., Bogomolov M. V., KOZLOV M. N., Shushkevich E. V., Khramenkov S. V., Menshchikova O. A.
Experience of Introduction of Innovation Technique for Prevention of a Water Hammer
Summary
The water hammer is a serious threat to pipeline systems and pumping equipment. This phenomenon constitutes a special hazard to the systems of water supply and sewerage of a big city. Emergencies and interruptions in the operation of water supply and sewerage networks may lead to grave consequences for the whole of municipal services. Examples of such situations making it possible to assess the scales of possible consequences are given. Basic reasons for generation of the water hammer are described; a brief excursus into the history of study of this phenomenon is presented. A considerable part of the article is devoted to measures aimed at prevention of the water hammer in the systems of water supply and sewerage of Moscow and to the use of energy efficient innovation technique.
Key words
pipeline , pumping station , water supply and sewerage networks , water hammer , energy efficient innovation technique
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UDC 628.24:621.397
Shchavelev A. S., Tsvilii S. V., Slivenko K. B.
The experience of introducing TV-inspection of sewers
Summary
Sustainable operation of utility distribution systems is an essential condition of ensuring comfortable life in megacities. Integrity and long operational life are the main requirements to the different-purpose pipelines (gas and water supply, sewers etc.). Regular TV-inspections of sewer condition provide for more efficient distribution of operation and repair expenditures, reduction of emergency repairs. The practical experience of establishing a TV-inspection laboratory in «Tumen Vodokanal» LLC and the results of its activities during 2011–2013 are presented. TV-inspection is an advanced technology of evaluating technical condition of underground utility distribution pipelines and engineering structures. The efficiency of the pipeline TV-inspection method when introduced into the flow process is shown. For the entire period of operation the TV-inspection laboratory specialists have investigated more than 350 objects, i. e. more than 46 kilometers of sewers, among them 30 kilometers of newly built networks. By means of using TV-inspection the time for determining the causes and locating blockages, leaks and other sewer pipe failures is reduced. Therefore, the amount of excavating and hence the general cost of repair works is reduced. Significant improving the culture and quality of construction works is an unconditional success of the laboratory activities. During two and a half years of the laboratory operations the number of facilities approved for operation on the first try increased more than 10-fold, whereas the number of defects to be eliminated with relaying or repair of pipe sections reduced more than 20-fold.
Key words
diagnostics , reliability , assessment of technical state , pipeline , TV-inspection , videocamera
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UDC 621.644
Ishmuratov R. R., Stepanov V. D., Orlov V. А.
The experience of applying trenchless spiral wound technology of pipeline rehabilitation at the Moscow projects
Summary
The specific features of the advanced spiral wound technology of trenchless rehabilitation of water and sewage pipelines based on the use of PUF coating that forms a new pipe inside the old one are presented. The operation sequence during the implementation of separate modifications of this technology (with and without filling pipe space) is stated by the example of a 420 mm diameter sewer section rehabilitation. The projects of rehabilitating old municipal and storm water sewers of different diameters and length by using trenchless spiral wound technology are presented.
Key words
pipeline , trenchless technology , spiral wound method , PUF coating , pipe space , cutting thread
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UDC 628.152
Shushkevich E. V., Bastrykin R. I., Aleshina E. V.
Features of Operation Mode of Water Supply and Distribution System under the Conditions of Decrease in Water Consumption
Summary
In connection with considerable decrease in volumes of water consumption influencing on an operation mode of water supply facilities of a city, optimization of hydraulic operation mode of all links of the system of water supply and distribution is necessary. These links are treatment facilities, pumping stations of the 2nd lift, regulating centres and pumping stations of the 3rd and 4th lifts situated within the precincts of the town as well as a distribution system and a consumer who should receive a qualitative product meeting the specified requirements. In the issue of assessment of influence of water consumption decrease on the operation mode of facilities, specialists of the MCUE Mosvodokanal have developed the complex of immediate and long-term measures aimed at optimization of conditions of water supply and distribution, conservation of some water supply facilities.
Key words
pipeline , water supply plant , water consumption decrease , control over water supply conditions
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UDC 628.17.08:681.121
Lurie M. S., Lurie O. M.
Assessment of a Random Error of Vortex Flow Meters in the Course of Their Operation
Summary
Methods of the assessment of a random error of vortex flow meters and water meters in the course of their operation are considered. This methodology is based on the statistical treatment of measurements of instantaneous values of vortex formation of the flow meter placed in the working pipeline. The scheme of connection of the vortex flow meter implemented in the submerged variant reducing the cost considerably and making it possible to use these instruments for measurement of a flow rate in large diameter pipelines and open canals is presented.
Key words
water meter , flow meter , pipeline , measurement error , methods of error assessment
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