Long-term protection and waterproofing of precast concrete drinking water tanks

Summary

For the construction of drinking water tanks reinforced concrete is most often used that has significant advantages compared to other materials, e.g. environmental friendliness (monolithic and precast concrete does not release toxic substances into water); durability (with proper operation, tanks made of reinforced concrete reliably serve at least 100 years while maintaining operational properties); the possibility of building tanks of different capacity and shape; affordable cost. The option of repair and waterproofing of prefabricated reinforced concrete water tanks in a drinking water supply system in the presence of defective areas is given. Such defects include: destruction of the protective layer of concrete with reinforcement baring, damage of the waterproofing of the wall panels adjoining the foundation, static joints between wall panels, wall panels adjoining ribbed floor slabs. Repair and waterproofing are carried out using Penetron and Skrepa materials that have the required permissions for being used in drinking water supply systems.

Key words

rehabilitation , domestic water supply , water tank , prefabricated reinforced concrete , waterproofing , protective layer , reinforcement

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UDC 621.671.62-752

Shchavelev A. S.

The experience of establishing vibration diagnostics laboratory

Summary

The equipment life time includes the stage of maintenance and repair. Maintenance and repair control aims at reducing equipment outage and maintenance expenditures. Very often this stage is vitally important for industrial enterprises since maintenance expenditures are rather high. For the Russian enterprises maintenance and repair expenditures can reach 80% of the profit (the average value in USA and Western Europe is 25–30%). Nevertheless, even with these expenditures the failure rate in industry is too high. All the maintenance and repair expenditures are included into the water and sewerage tariff. Considering the social significance of tariff rates more transparent and reasonable repair process must be worked out. The control philosophy improvement, tools of technical control and diagnostics of the equipment condition provided for enhancing the efficiency of equipment maintenance and repair control. However, the operating experience shows that they did not gain widespread currency at the Russian industrial enterprises. In Tumen Vodokanal a vibration diagnostics laboratory has been established that carries out pumping unit vibration control and alignment at the company facilities. The conducted works ensured reducing pumping unit failures and improving the efficiency of cash flow distribution for the equipment repair.

Key words

rehabilitation , pumping unit , maintenance , vibration diagnostics , alignment , non-destructive control

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UDC 628.253

Goncharenko D. F., Korinko I. V., Bondarenko D. A.

The technology of repair and rehabilitation of the main shafts of deep-laid sewers

Summary

Inspection shafts are very important components of sewers; therefore choosing an optimal repair technology is a vital task. The aspects of repair and rehabilitation of deep sewer inspection shafts are considered. Technologic and technical solutions with the use of molded polyethylene, reinforced molded slag panels, ceramic bricks are presented. The advantages and disadvantages of the presented technologies are shown alongside with the examples of their use in practice.

Key words

polyethylene , water disposal , main shaft , rehabilitation , molded slag panel , ceramic brick

DOI 10.35776/MNP.2020.04.09
UDC 628.147.2+628.247

Kel’ Roman

Stages of development of repair methods for water distribution
and sewer networks

Summary

The construction of water distribution and sewer networks in Novokuznetsk was carried out in 1950–1970 with the rapid development of the industrial city. Today Vodokanal LLC is the main provider of cold water supply and wastewater disposal services to the population and industries in Novokuznetsk. In the 1990s, the conditions of the networks and the economic situation in the country required the search for advanced time-effective construction and repair technologies at minimum use of resources and finance for the most efficient performance of work. Today, the attitude of the enterprise for search for technically new, while also cost-effective, methods of repairing water distribution and sewer networks allow providing consumers with high-quality drinking water as one of the factors of sanitary and epidemiological well-being, improving the efficiency, reliability and quality of operations of the municipal drinking water supply and wastewater disposal facilities.

Key words

diagnostics , rehabilitation , gas corrosion , rehabilitation , water distribution and sewer networks , HD polyethylene , corrugated polypropylene , steel sewer wear , pipe locator , leak detection , teleinspection float raft , multifunctional mobile emergency-repair vehicle