Analytical methods for minimizing the cost of repair work on pipeline networks in the formation of a digital double of infrastructure

2021 ◽  
Author(s):  
Krygin Andrey
Keyword(s):  
Analytical Methods ◽  
Repair Work ◽  
Pipeline Networks ◽  
The Cost

THE TECHNICAL CONDITION OF THE SURVEYED HYDRAULIC UNITS IN THE MOSCOW REGION AND THE CLASSIFICATION FEATURES OF THEIR RESERVOIRS

2021 ◽  
pp. 69-79
Author(s):  
V. V. GRITSAN ◽  
Keyword(s):  
Technical Condition ◽  
Moscow Region ◽  
Risk Level ◽  
Ecological Framework ◽  
Safety Level ◽  
Repair Work ◽  
Hydraulic Unit ◽  
Technical Parameters ◽  
Characteristic Features ◽  
The Cost

The article presents the results of surveys of 311 class IV hydraulic structures carried out in 2016-2020 in the Moscow region. All the reservoirs of the surveyed hydraulic units were classified according to their characteristic features, the technical condition of culverts and dams was assessed, there was established the safety level of both separate structures and hydraulic units as a whole. During the surveys, the technical parameters of the surveyed structures were established, the state of each structure and the hydraulic unit as a whole was assessed, a possibility of their accident and a risk level for the downstream areas were considered. At the same time, recommendations were developed for the elimination of serious damage and, with the help of an examination, the amount of the cost of the necessary repair work was determined. The paper also assesses the issues of the ecological state of the areas where the hydraulic units are located and the hydraulic units themselves as blocks of the ecological framework of the territories.

scholarly journals Effect of a dual tire pressure on the design parameters of thick asphalt pavements using finite element freeware

DYNA ◽  
2016 ◽  
Vol 83 (196) ◽  
pp. 194-203
Author(s):  
Myriam Rocío Pallares Muñoz ◽  
Julián Andrés Pulecio-Díaz
Keyword(s):  
Finite Element ◽  
Analytical Methods ◽  
Asphalt Pavement ◽  
Field Tests ◽  
Asphalt Pavements ◽  
Design Parameters ◽  
Future Research ◽  
Tire Pressure ◽  
The Cost ◽  
Cost Of Construction

<p>The effect of a dual tire pressure on the design parameters of thick asphalt pavements using finite element freeware EverStressFE©1.0 is evaluated. This is trying to represent more adjusted the footprint shape and intensity of stress generated by the tires of vehicles. To validate the elastic multilayer EverStress©5.0 software was used. The results of the deformations can be concluded that the asphalt pavement designs made with analytical methods may be slightly oversized and consequently increase the cost of construction of pavements. This study marks a route to analyze the sensitivity of various factors that may affect the design of asphalt pavements. Future research is expected to integrate dynamic conditions by introducing results of field tests to full scale.</p>

scholarly journals EFFECTIVENESS EVALUATION OF STEEL STRENGTH IMPROVEMENT FOR PYRAMIDAL-PRISMATIC BUNKERS

2020 ◽  
Vol 2 ◽  
pp. 30-38
Author(s):  
Yukhym Hezentsvei ◽  
Dmytro Bannikov
Keyword(s):  
Low Temperatures ◽  
High Strength ◽  
Operating Conditions ◽  
Professional Literature ◽  
Plastic Properties ◽  
Repair Work ◽  
Practical Engineering ◽  
Cis Countries ◽  
The Right ◽  
The Cost

In accordance with the recommendations of specialized professional literature, steel pyramidal-prismatic bunkers are projected for a service life of 20 years. However, in practice this term is often twice, or even three times lower. This is especially true for complicated operating conditions, in particular the effect of increased loads and low temperatures. Existing design techniques for such structures, both in European practice and the design practice of Ukraine and other CIS countries do not pay attention to these aspects. Therefore, in the practice of operation, the increased accident rate of steel bunker capacities has already become virtually a common occurrence. One of the possible ways to solve this problem is presented, which consists of using instead of traditional steels of ordinary strength with high plastic properties, steels of increased or high strength with reduced plastic properties. At the same time, clear theoretical recommendations are provided for choosing the right steel depending on the operating conditions, primarily when exposed to increased loads. The recommendations are presented in a form convenient for practical engineering applications. The proposed approach allows to reduce the material consumption of structures of this type on average according to theoretical estimates by 25-30% without reducing their bearing capacity. Their durability is also further enhanced by improving performance at low temperatures. Thus, the applied aspect of such a solution to this above problem is the possibility of increasing the overall reliability of steel bunker capacities, as well as reducing the cost of their periodic maintenance and repair work. A practical illustration of the presented approach is also given on the example of the design of bunkers of a bypass track for supplying charge materials for blast furnaces of one of the metallurgical plants of the northern location. As a result, this created the preconditions for monetary savings of about 0.5 million UAH in prices 2019 (about 20,000 USD)

scholarly journals Analytical quantification of electrochemical ferrates for drinking water treatments

2017 ◽  
Vol 95 (1) ◽  
pp. 105-112 ◽  
Author(s):  
Macarena A. Cataldo Hernández ◽  
Andrew May ◽  
Arman Bonakdapour ◽  
Madjid Mohseni ◽  
David P. Wilkinson
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Analytical Methods ◽  
Advantages And Disadvantages ◽  
Excellent Candidate ◽  
Colorimetric Measurements ◽  
Analytical Quantification ◽  
Time Required ◽  
The Cost ◽  
Water Treatments

Ferrate ions are a highly oxidizing and unstable species that are challenging to quantify and analyze. They are, however, becoming increasingly recognized as an excellent candidate for a number of applications such as for water treatment. A wider acceptance of ferrates requires an accurate assay of the produced ferrates. We report on four analytical methods (existing and new) for quantification of ferrates and discuss their advantages and disadvantages. These methods include titrimetric analysis and spectrometric techniques such as direct colorimetric measurements of ABTS or NaI colorimetric. In terms of accuracy, the cost, simplicity, and time required the modified indirect UV-Vis NaI method is shown to be the most effective of all of the four methods investigated.

scholarly journals APPLICATION OF PNEUMATIC FORMWORK FOR REPAIR AND RESTORATION OF SEWER PIPELINES USING CLINKER BRICK AND POLYMER CONCRETE

2021 ◽  
pp. 45-51
Author(s):  
D.F. GONCHARENKO ◽  
O.V. STARKOVA ◽  
R.I. GUDILIN ◽  
Yev.H. DEGTYAR
Keyword(s):  
Agricultural Land ◽  
Significant Part ◽  
Polymer Materials ◽  
Polymer Concrete ◽  
Main Bearing ◽  
Repair Work ◽  
Repair Costs ◽  
Network Diameter ◽  
Restoration Work ◽  
The Cost

Raising of problem. A significant part of wastewater in Ukrainian cities is discharged using sewer collectors with a diameter of 300 to 1 400 mm, the depth of which is within 3…8 m. A significant part of them is destroyed due to corrosion processes that take place in the surface space. Today, the problem of repair and restoration of sewerage networks is becoming especially relevant in connection with the increased requirements for environmental protection. Failure in sewer lines usually results in wastewater infiltration into groundwater and soil. During the repair and restoration of sewage collectors, open and closed methods of work are used. Taking into account that a significant part of sewage collectors passes through areas where there are no transport arteries, through agricultural land and have an insignificant depth of occurrence, and also the fact that their trough part, as a rule, cannot be destroyed due to corrosion, it is advisable to carry out repair and restoration work on them in an open way. Analysis of accidents on sewage collectors, which took place in different cities of Ukraine, showed that, as a rule, due to corrosion, intensive destruction of the roof of the collectors occurs. At the same time, the trough part of the collectors remains intact due to the fact that it is constantly filled with waste water. When repairing such sections of sewerage networks in recent years, operating organizations have been using polyethylene and fiberglass pipes. These smaller pipes are installed in the retained trough part, thus reducing the network diameter. The cost of new pipes is quite high, which in turn increases operating costs. The use of pneumatic formwork allows you to create a new collector, and as the main bearing element, you can use the saved tray part. Purpose. Evaluation of the possibility of using known materials for the manufacture of pneumatic formwork, which will make it possible to carry out repair work to create a new vault using the trough part of the sewer collector as a supporting structure, which will significantly reduce repair costs compared to using pipes made of polymer materials. Conclusion. The investigated samples of materials – fabric Mare 1400 and Hypolon (ORCA 828) – can be used for the manufacture of pneumatic formwork, since laboratory tests made it possible to conclude that there was no adhesion between concrete and material samples.

EXCAVATOR WORKING EQUIPMENT FOR ISLANDS OF PIPELINE REPAIR

2021 ◽  
Vol 2021 (11) ◽  
pp. 66-72
Author(s):  
Anton Letopol'skiy ◽  
Pavel Korchagin ◽  
Irina Teterina
Keyword(s):  
Hydraulic System ◽  
Main Idea ◽  
Road Construction ◽  
Size Group ◽  
Theoretical Studies ◽  
Repair Work ◽  
The Third ◽  
Excavator Bucket ◽  
The Stability ◽  
The Cost

Work objective. Modernization of the excavator's working equipment design intended for islands of pipeline repair together with confirmation of its operability by checking the machine for stability, carrying out the necessary calculations of the hydraulic system. Methods. The main idea is in accessorizing the main working equipment of the excavator with a structure consisting of three teeth, which is in a body with an excavator bucket form a pickup mechanism. To confirm the operability of the proposed design, theoretical studies have been carried out aimed at determining the stability of the machine for the most dangerous design operating positions, and permissible pipe sizes have been established so that working with these sizes provides the stability of the machine. Results. A variant of improving the design of the excavator working equipment of the third size group has been developed. The equipment is intended for carrying out random repair of the pipeline by the excavator without involving other road construction equipment (for example, a pipelaying crane). The proposed design of the working body allows speeding pipeline repair by reducing the time spent on changing or relocating the equipment, which as a result reduces the cost of repair work. Conclusions. Calculations of the excavator hydraulic system have been carried out. In addition, as a result of theoretical studies, calculated dependences have been obtained, which made it possible to establish the stability coefficient of the excavator of the third size group when working with upgraded equipment and the pipeline diameter in the range of 720 ...1420 mm. As a result of the research, it was found that the proposed equipment is effective for carrying out random repairs of pipelines with diameters of 720, 1020 and 1220 mm. The stability of the machine in the most dangerous positions is being carried out. The calculation shows that when the excavator does demolition works of a pipeline with a diameter of 1420 mm, there is a danger of overturning the machine due to a decrease in the Ku coefficient below the permissible value.

scholarly journals Determination of failure rate function on the basis оf the markovian process

2021 ◽  
pp. 79-87
Author(s):  
Iryna Bashkevych ◽  
◽  
Yurii Yevseichyk ◽  
Kostiantyn Medvediev ◽  
Leonid Yanchuk ◽  
...  
Keyword(s):  
Failure Rate ◽  
Residual Life ◽  
Analytical Form ◽  
Rate Function ◽  
Markovian Process ◽  
Failure Rate Function ◽  
Repair Work ◽  
Rate Functions ◽  
Maintenance Work ◽  
The Cost

The life cycle of a construction (or its element) is considered as markovian process with discrete states and continuous time. Five operational states have been accepted, in which the construction may be. The corresponding system of differential equations is obtained for the case of a homogeneous markovian process with a constant conversion rate (Kolmogorov system). The method of uncertain coefficients is applied to solve the system of equations in analytical form. The obtained solutions make it possible to determine the probability of finding the construction in a particular state as well as the most likely transition time from one operational state to another. Security function defined as the probability of not finding the construction in its last (inoperable) state and the failure rate function. The graphs of the probability of finding a construction in each of the five states, reliability and failure rate functions are presented and investigated. The obtained analytical dependences make it possible to determine the longevity and residual life of the work both individual elements and structures as a whole and optimize scheduling for ongoing maintenance work, significantly improve the performance of the structure, reduce the cost of repair work and extend the life of the structure.

scholarly journals Software for Calculating Economic Standards Adjusted in Terms of the Market Value of Equipment

2021 ◽  
Vol 19 (4) ◽  
pp. 118-129
Author(s):  
N. G. Sokolova ◽  
N. M. Mezrina
Keyword(s):  
Market Value ◽  
Equipment Maintenance ◽  
Repair Work ◽  
Maintenance And Repair ◽  
Industrial Enterprises ◽  
Material Costs ◽  
Market Planning ◽  
Main Class ◽  
The Cost ◽  
Lifting Equipment

The complexity of software for improving and monitoring processes related to the repair and maintenance of equipment at industrial enterprises is an automated system for the maintenance and repair of equipment, which plays an important role in the market planning of equipment maintenance and repair. Due to the fact that there was a need to write software for calculating economic standards in the market planning of equipment maintenance and repair, a program was written. The introduction of the software in the market planning of equipment maintenance and repair is economically justified in terms of reducing the cost of repairs, reducing losses from equipment downtime. The software product will allow you to calculate a scientifically grounded indicator of the costs of capital repairs of fixed assets (lifting equipment) for the 1 category of repair complexity; scientifically grounded indicator of working capital for overhaul for the 1 category of repair complexity; scientifically grounded indicator of material costs for the 1 category of repair complexity during overhaul of press-forging equipment, forging-steam-air hammers; scientifically grounded indicator of material costs for the 1 category of repair complexity during overhaul of lifting equipment; scientifically grounded indicator of material costs for the 1 category of repair complexity during overhaul for foundry equipment; scientifically grounded indicator of material costs for the 1 category of repair complexity when carrying out overhaul of machine tools; the cost of repair work of technological equipment for the 1 category of repair complexity; calculate the market value of the equipment, which is adjusted by the coefficients of physical, functional, external, and moral wear. In the paper, the proposed software for calculating economic standards in market planning of the maintenance and repair of equipment is written in C# Sharp using the framework .NET Core 3.1. The program implements two classes - Program (main class) and Formula (formula class). The formula class encapsulates all the properties and methods of the formula necessary to work with it, including input, storage of all entered values. The main class consistently creates objects of the formula class and executes the methods necessary for the calculation. The paper contains links to the source code and the program. The software allows you to multiply the efficiency of the project management for the equipment maintenance and repair .

Development of API 5L X-80 Plates and Pipes at Essar Steel

2013 ◽  
Author(s):  
Anil Kulkarni ◽  
Sirshendu Chatterjee ◽  
Yogesh Patel ◽  
Nitin Amte
Keyword(s):  
High Strength ◽  
Alloy Design ◽  
Hot Strip Mill ◽  
Plate Mill ◽  
Development Activity ◽  
The World ◽  
Pipeline Networks ◽  
Major Producer ◽  
Growing Economy ◽  
The Cost

India is a large and rapidly growing economy. The energy requirements of the country in terms of oil products and natural gas is also huge. Given its vast geographical size, there is ever-growing need to transport these oil & gas products over large distances but economically. For this purpose, several new projects for laying of new pipeline networks are at different stages of planning. In order to keep the cost of such large pipeline projects lower, countries around the world have shifted to higher strength API grades of steel. This was facilitated by advances in steel-making and processing technology and modern facilities that came up in advanced countries. India is no different and we have seen a gradual shift towards higher strength API grades being used for pipelines. Essar Steel has been a major producer of API grades of steel in India over the last 15 years initially through its hot-strip mill and more recently adding a state-of-the-art 5M wide plate mill as well as pipe mills, both LSAW & HSAW. Different alloy designs have been used around the world to produce high strength and high toughness API grades. These have produced essentially two types of microstructures which are either ferrite + pearlite or ferrite + acicular ferrite. But these microstructures show varying response to the pipe-making process. Choice of alloy design also has a major bearing on the cost of steel, but is partly influenced by mill capability. At Essar, while cost was a major determining criterion for selection of suitable alloy design, mill capability was not a constraint. Essar Steel has successfully produced X-80 plates and pipes with a modified HTP alloy design and using the new facilities of plate mill & pipe mill. The paper gives some of the key highlights of this development activity. This was a collaborative effort between the metallurgists & engineers at Essar Steel India Limited and experts from CBMM.

Sign in / Sign up

Export Citation Format

Share Document