scholarly journals Application of geosynthetic materials for road structures

2019 ◽  
Vol 265 ◽  
pp. 01013
Author(s):  
Elvir Akhmetshin ◽  
Kseniya Kovalenko
Keyword(s):  
Unit Cost ◽  
Road Construction ◽  
Coastal Zones ◽  
Technical Documentation ◽  
Calculation Methods ◽  
Road Surfaces ◽  
Environmentally Safe ◽  
Useful Life ◽  
The Cost ◽  
Cost Of Construction

In this article, the authors examines the application of geomaterials in road constructions, it economic indicators, the dependence of surface density and unit cost, as well as strength and unit cost, are analyzed. The economic and technical advantages of using woven geomaterials are shown. Geosynthetic materials allow increasing the strength of road structures and reducing the cost of construction while maintaining strength and reliability. Geogrid road has all the permits and technical documentation: the calculation methods are developed for the solution of road construction. Woven geomaterials are the best to use and have a number of advantages, but now nonwoven geomaterials are usually used in Russia, which is caused by imperfect design methods that do not take into account the strength of the geomaterial and reduce the density of pavement when using thick geomaterials. Geomaterials are geosynthetic products for strengthening slopes, slopes, coastal zones, road surfaces and other territories that need strengthening of soils. Geomaterials, among other things, are an excellent protection against erosion, environmentally safe, reliable, have a long useful life and are easily installed. Depending on the needs and type of territory, geogrids, geomatics and road geosets are used.

scholarly journals Influence of natural and climatic factors on the organization of construction

2020 ◽  
Vol 164 ◽  
pp. 08006
Author(s):  
Marat Kuzhin ◽  
Ekaterina Chepik ◽  
Angelina Baranova
Keyword(s):  
Climatic Factors ◽  
Climatic Conditions ◽  
Technical Documentation ◽  
Construction Work ◽  
Natural Conditions ◽  
Factors Affecting ◽  
The Cost ◽  
Monolithic Structures ◽  
Cost Of Construction

In this research the influence of natural and climatic conditions on the organization of construction production are examined. Our purpose was to identify the nature of the dependence of the duration of construction work on natural and climatic factors. The analysis of normative and technical documentation in terms of accounting for the influence of natural and climatic factors was made. The system of estimation of influence of natural conditions on preparatory, ground, facade, roofing works, and also the appliance of monolithic structures, installation of prefabricated ferroconcrete items, and on works – implementation of internal finishing is offered. It was estimated, that the norms of construction production take into account a certain number of natural and climatic factors affecting the performance of work, but most of these factors have not yet been given in the normative and technical documentation. It is necessary to study this issue more comprehensively and to establish exact dependences on natural and climatic conditions, which will allow to quantify these factors already while calculating. This is necessary to compile more accurate calendar plans and schedules of production of works, as close as possible to real conditions. The study of this issue is one of the most important issues in the design of construction production. With insufficient consideration of these factors, the final actual figures are very different from the projected ones, which also lead to an increase in the cost of construction and installation work and the duration of their implementation. Taking into consideration the influence of natural and climatic factors will allow planning construction production more accurate.

scholarly journals Modeling the Interaction of Forest Machines with Soil when Working on Slopes

2021 ◽  
pp. 121-134
Author(s):  
Sergey E. Rudov ◽  
◽  
Vladimir Ya. Shapiro ◽  
Olga I. Grigoreva ◽  
Igor V. Grigorev ◽  
...  
Keyword(s):  
Large Scale ◽  
Negative Impact ◽  
Far East ◽  
Road Construction ◽  
The Far East ◽  
Machine Systems ◽  
Effective Development ◽  
The Cost ◽  
Technical Solutions ◽  
Cost Of Construction

The urgency of the task of effective development of cutting areas on the slopes of mountains, hills, and hilly-ridge reliefs is primarily due to the depletion of available, special, lowland operational forests in Siberia and the Far East, which were once, not quite correctly, called forest-surplus regions of the Russian Federation. The operational woodlands that are convenient for development in Siberia and the Far East are largely depleted. To develop new ones, large-scale road construction is necessary, which requires significant financial expenses and reduces the already low profitability of logging production. It is also declining due to the ever-increasing volume of export of harvested timber, even if the cost of construction and maintenance of a new network of logging roads is not considered. Forest ecosystems located on slopes are among the most vulnerable. When working on the slopes with traditional systems of logging machines, it becomes necessary to cut a serpentine of skid trails, which later become concentrators of water and wind erosion. Currently, leading manufacturers of machinery and equipment for the forest industry, such as Ponsse, John Deer, Komatsu, and others, have developed technical solutions that significantly facilitate the operation of forest machine systems. Such solutions, first of all, include winches integrated into the transmissions of machines. Another solution is to use separate self-propelled winches remotely controlled by the operator of a forest machine, for example, T-winch. In this case, the machine does not receive additional weight from the winch integrated into it; however, the negative impact of forest machines on soils does not disappear, but has its own significant specifics. The article shows that when performing logging operations on slopes, primarily steep ones with slope angles exceeding 20–25°, it is necessary to make adjustments to the assessment of the destruction nature of the soil array and the patterns of the track depth formation under the influence of the skidding system. For citation: Rudov S.E., Shapiro V.Ya., Grigorev I.V., Kunitskaya O.A., Grigoreva O.I. Modeling the Interaction of Forest Machines with Soil when Working on Slopes. Lesnoy Zhurnal [Russian Forestry Journal], 2021, no. 6, pp. 121–134. DOI: 10.37482/0536-1036-2021-6-121-134

scholarly journals Development of a model of selecting cloud software for a road construction organization under interval information

2021 ◽  
Vol 6 (4(62)) ◽  
Author(s):  
Oleksandr Kononykhin
Keyword(s):  
Road Construction ◽  
Interval Uncertainty ◽  
Software Requirements ◽  
Necessary Condition ◽  
Maximum Speed ◽  
Technical Documentation ◽  
Internet Connection ◽  
Construction Organization ◽  
The Cost ◽  
Transport Management

The object of research is the management processes of a road construction organization. The research is based on the principles of systems analysis for structuring design processes; methods of mathematical modeling, fuzzy mathematics, discrete programming, multicriteria assessment and optimization for the selection of cloud software for road construction organizations in terms of interval information. The information system of a road construction organization includes planning, reporting, regulatory and technical documentation that characterizes the state and movement of information in the enterprise. It is important to use systems that speed up the generation, processing and preparation of documents, as well as improve the storage and retrieval of information. The introduction of cloud technologies has become a necessary condition for increasing the mobility, flexibility and efficiency of the management system of a road construction organization. Formalized processes of information collection and internal distribution can better predict the dynamics of market trends and act more quickly, make decisions confidently and reasonably. In the final stages of selection for assessment, it is convenient to apply the criteria in conditions of interval uncertainty. The study was aimed at improving the efficiency of transport management by developing a model for choosing the cloud software of a road construction organization in terms of interval information. The following criteria of partial optimization were used in the developed model: maximum speed of execution of functions by cloud software; minimum cloud software requirements for internet connection speed; minimum cost of cloud software. The scope of permissible solutions is determined by restrictions: – execution of all functions must be provided by cloud software; – the minimum speed of execution of functions by the cloud software should be not lower than set; – cloud software requirements for Internet connection speed should not exceed the specified; – the cost of cloud software should be no more than specified. The developed model will reduce the cost of purchasing cloud software and increase the efficiency of transport management of a road construction organization.

scholarly journals The device layers and transport facilities of hemihydrate phosphogypsum (waste byproduct of the production of nitrogen-phosphorus fertilizers)

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Andrey Kochetkov ◽  
Natal’ya Shchegoleva ◽  
Sergey Korotkovskiy ◽  
Victor Talalai ◽  
Yury Vasilyev ◽  
...  
Keyword(s):  
Raw Materials ◽  
Road Construction ◽  
Turnaround Time ◽  
Tracked Vehicles ◽  
The Road ◽  
The Cost ◽  
Cost Of Construction ◽  
Phosphogypsum Waste ◽  
Nitrogen Phosphorus

The implementation of the proposed innovative project on the use of phosphogypsum waste in road construction will: solve the problem of recycling and processing of phosphogypsum by using it as a local by-material for the construction of roadbed and foundations of roads; replace natural gypsum with cheaper raw materials for cement, construction and road industry; reduce the cost of construction of roads and extend the turnaround time by improving the quality of their properties. Road with the use of phosphogypsum is cheaper by 30 % than roads with traditional technologies. In the swampy area due to the characteristics of the material, combining solidity and lightness, phosphogypsum is not interchangeable at all. It allows you to make reliable and durable roads. The design is obtained up to five times stronger than the required standards. At the same time, at the first stage of construction of the road, it is possible to make an intermediate type, making the bases of phosphogypsum, and later laying the remaining structural layers of crushed stone and asphalt. In this case, the coating of technical gypsum is not destroyed, even with the passage of heavy tracked vehicles and at low temperatures.

Optimization of Construction Cost Using Industrial Wastes in Alternative Building Material for Walls

2016 ◽  
Vol 692 ◽  
pp. 1-8 ◽  
Author(s):  
Swetha Madhusudanan ◽  
Lilly Rose Amirtham
Keyword(s):  
Fly Ash ◽  
Tamil Nadu ◽  
Building Materials ◽  
Unit Cost ◽  
Construction Cost ◽  
Industrial Wastes ◽  
Wall Material ◽  
Load Bearing ◽  
The Cost ◽  
Cost Of Construction

Building materials constitute about 60%-70% of the total cost of construction. Reduction in the use of conventional materials may not be possible; therefore, an alternative solution to use low cost materials would reduce the overall construction cost of a building. Industrial wastes, when recycled and reused as a building materials, not only aid in overcoming disposal problems, but also conserve natural resources, decrease energy use, and reduce pollution caused during manufacturing processes, and consequently reduce greenhouse gas emissions. Materials such as Copper slag, Phospogypsum and Fly ash, when used as supplements for sand and coarse aggregate in the manufacture of wall materials, reduce the cost of construction considerably. Additionally, construction of buildings using these materials leads to more energy efficient buildings and can gain additional weightage (points) in Green building certification. The aim of this paper is to highlight the cost reduction in using alternative wall material for construction, through detailed analysis in an apartment building in Chennai, Tamil Nadu, India. A comparative study between the different materials used such as, bricks, fly ash blocks and Alternative blocks made of industrial waste (Madhusudanan 2015)) were taken into consideration to assess the unit cost of each material. Similarly, a study of the cost performance between a load bearing structure and a framed structure was made, and it was found that the overall construction cost has a greater impact for a load bearing building when compared to a framed structure.

scholarly journals CALCULATION OF FUNDAMENTAL STRUCTURES BY THE METHOD OF DEFORMATIONS

2021 ◽  
pp. 99-110
Author(s):  
Svitlana Yesakova ◽  
Dmitro Chepurnui ◽  
Anna Kupreichyk
Keyword(s):  
Strain State ◽  
Building Materials ◽  
Unit Cost ◽  
Variable Stiffness ◽  
Calculation Methods ◽  
Deformation Method ◽  
Scientists And Engineers ◽  
Process Of Urbanization ◽  
Cost Of Construction ◽  
Direct Proportionality

The unceasing process of urbanization all over the world and the constantly growingcost of land plots allotted for development makes investors, scientists and engineers look for and findways to reduce the unit cost of construction of useful areas of buildings and structures for variouspurposes.The most effective way to reduce the unit cost of construction of useful areas of buildings andstructures is to increase their number of storeys and depths of underground parts. But with an increasein the height of buildings, the loads on their foundations also increase, stimulating scientists andengineers to search for more advanced methods and methods for solving problems related todetermining the rational parameters of the foundations of buildings and structures, improving thequality and reliability of the calculation methods used.The results obtained using modern methods of calculating foundations in some cases lead to anoverestimation of the costs of building materials, in some – to a decrease in comparison with the realstrength and deformation indicators of the foundations of construction objects.This book describes a deformation method that allows you to improve the calculations of thestress-strain state of pile and some other types of foundations by expressing the deformations offoundation structures by the dependence of the foundation settlement on the rigidity of the«foundation-foundation» system and the coefficient of foundation rigidity, which varies along thelength or depth of the foundations, which will significantly improve the performance of buildings andstructures.Based on the hypothesis of direct proportionality (Winkler), we use the ability of such a modelof the basis to take any variable stiffness along the length of the structure that transmits the load tothe ground. Representing a system of unconnected springs of different stiffness, such a base is able tomimic the resolution of the currently used different models within the base of the foundations. However, outside the sole, Winkler cannot consider the resolution of the real soil in terms ofinteraction with adjacent foundations. Thus, we are going to take into account only the «internal»resolution of different models of the basis. It is not difficult to obtain this information using analyticaland numerical methods for determining the stress-strain state of the soil base.

ABOUT NECESSITY OF MATHEMATICAL MODELING OF THE BUSINESS PROCESS OF COST ESTIMATE CALCULATIONS IN THE CONSTRUCTION OF OIL AND GAS FACILITIES

2017 ◽  
pp. 139-145
Author(s):  
R. I. Hamidullin ◽  
L. B. Senkevich
Keyword(s):  
Mathematical Modeling ◽  
Quality Assessment ◽  
Business Process ◽  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Gas Industry ◽  
Construction Organizations ◽  
The Cost ◽  
Cost Of Construction

A study of the quality of the development of estimate documentation on the cost of construction at all stages of the implementation of large projects in the oil and gas industry is conducted. The main problems that arise in construction organizations are indicated. The analysis of the choice of the perfect methodology of mathematical modeling of the investigated business process for improving the activity of budget calculations, conducting quality assessment of estimates and criteria for automation of design estimates is performed.

This Is an Abridged Account of Delhi Which Is an Old City and One of the Chosen Ones amongst the Cities

2018 ◽  
Author(s):  
Mirza Sangin Beg
Keyword(s):  
Popular Culture ◽  
East India Company ◽  
Ordinary People ◽  
Work Spaces ◽  
History Of ◽  
English East India Company ◽  
Local Traditions ◽  
The Cost ◽  
The City ◽  
Cost Of Construction

The second part of the translation has three segments. The first is dedicated to the history of Delhi from the time of the Mahabharat to the periods of Anangpal Tomar to the Mughal Emperor Humayun as also Sher Shah, the Afghan ruler. In the second and third segments Mirza Sangin Beg adroitly navigates between twin centres of power in the city. He writes about Qila Mubarak, or the Red Fort, and gives an account of the several buildings inside it and the cost of construction of the same. He ambles into the precincts and mentions the buildings constructed by Shahjahan and other rulers, associating them with some specific inmates of the fort and the functions performed within them. When the author takes a walk in the city of Shahjahanabad, he writes of numerous residents, habitations of rich, poor, and ordinary people, their mansions and localities, general and specialized bazars, the in different skills practised areas, places of worship and revelry, processions exemplifying popular culture and local traditions, and institutions that had a resonance in other cultures. The Berlin manuscript gives generous details of the officials of the English East India Company, both native and foreign, their professions, and work spaces. Mirza Sangin Beg addresses the issue of qaum most unselfconsciously and amorphously.

Marginal assessment of the cost and benefits of aphasia treatment: Evidence from community-based telerehabilitation treatment for aphasia

2021 ◽  
pp. 1357633X2098277
Author(s):  
Molly Jacobs ◽  
Patrick M Briley ◽  
Heather Harris Wright ◽  
Charles Ellis
Keyword(s):  
Cost Effectiveness ◽  
Economies Of Scale ◽  
Reference Group ◽  
Unit Cost ◽  
Community Based ◽  
Face To Face ◽  
Conduction Aphasia ◽  
Aphasia Treatment ◽  
The Cost ◽  
The Relationship

Introduction Few studies have reported information related to the cost-effectiveness of traditional face-to-face treatments for aphasia. The emergence and demand for telepractice approaches to aphasia treatment has resulted in an urgent need to understand the costs and cost-benefits of this approach. Methods Eighteen stroke survivors with aphasia completed community-based aphasia telerehabilitation treatment, utilizing the Language-Oriented Treatment (LOT) delivered via Webex videoconferencing program. Marginal benefits to treatment were calculated as the change in Western Aphasia Battery-Revised (WAB-R) score pre- and post-treatment and marginal cost of treatment was calculated as the relationship between change in WAB-R aphasia quotient (AQ) and the average cost per treatment. Controlling for demographic variables, Bayesian estimation evaluated the primary contributors to WAB-R change and assessed cost-effectiveness of treatment by aphasia type. Results Thirteen out of 18 participants experienced significant improvement in WAB-R AQ following telerehabilitation delivered therapy. Compared to anomic aphasia (reference group), those with conduction aphasia had relatively similar levels of improvement whereas those with Broca’s aphasia had smaller improvement. Those with global aphasia had the largest improvement. Each one-point of improvement cost between US$89 and US$864 for those who improved (mean = US$200) depending on aphasia type/severity. Discussion Individuals with severe aphasia may have the greatest gains per unit cost from treatment. Both improvement magnitude and the cost per unit of improvement were driven by aphasia type, severity and race. Economies of scale to aphasia treatment–cost may be minimized by treating a variety of types of aphasia at various levels of severity.

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