69439
2658-5553
AlfaBuild
3
1
3
2018
1-89
REV
RUS
7-14
Peter the Great St.Petersburg Polytechnic University, Russian Federation
Dukhopelnikova
Natalia
natik11-star@mail.ru
195251, Russia, St. Petersburg, Polytechnic St., 29
Surface waste water, the water disposal system and water purifying in the big city
In large cities, surface sewage represents large amounts of contaminated water. Analysis of the composition of waste water showed that the main pollutants are suspended substances and petroleum products. The amount of surface runoff is affected by hydrometeorological conditions, such as the duration and intensity of the rain, the amount of precipitation in the winter. To reduce the negative impact on surface water runoff from residential areas and highways, it is necessary to organize the collection of surface sewage, drainage system and subsequent cleaning. In this article, on the example of data from St. Petersburg, the composition of surface wastewater, the dependence of the concentration of pollutants on the amount of atmospheric precipitation are considered. Effective methods for their purification before discharging into a body of water are proposed in accordance with the provisions of the Federal Law "On Environmental Protection”.
10.34910/ALF.3.1
62.628.312.5
purification of surface runoff
waste water
water pollution
environmental problem
sewage treatment plant
sewage effluent
wastewater purification
recycling of sewage
https://alfabuild.spbstu.ru/article/2018.3.1/
1_3.pdf
REV
RUS
7-33
Peter the Great St.Petersburg Polytechnic University, Russian Federation
Sovetnikov
Daniil
sovetnikov.daniil@gmail.com
195251, Russia, St. Petersburg, Polytechnic St., 29
Peter the Great St.Petersburg Polytechnic University, Russian Federation
Azarov
Artur
alexio009@mail.ru
195251, Russia, St. Petersburg, Polytechnic St., 29
Peter the Great St.Petersburg Polytechnic University, Russian Federation
Ivanov
Sergey
serzikserzik@gmail.com
195251, Russia, St. Petersburg, Polytechnic St., 29
56296687300
Peter the Great St.Petersburg Polytechnic University, Russian Federation
Rybakov
Vladimir
fishermanoff@mail.ru
195251, Russia, St. Petersburg, Polytechnic St., 29
Methods of calculation of thin-walled bars: statics, dynamics and stability
Since the beginning of the XXI century the use of light steel thin-walled structures made of roll-formed profiles in industrial and civil construction is growing rapidly. The use of such structures has given impetus to the development of the whole industry including the design, manufacture and installation of structures using thin-walled cold-formed sections of galvanized steel. The purpose of the review, given the importance of the analysis of thin-walled steel structure bearing capacity and stability, is a compilation of the major theoretical calculations exploring the stress-deformation condition of the structures, together with experimental evidence and examples of mathematical modeling. The article is devoted to analytical review of existing publications by Russian and foreign authors on the topic of analysis of steel thin-walled rods. This article compiles the most significant work devoted to the theoretical foundations of calculation of thin-walled beams in the formulation of static, dynamic problems and buckling. Special attention is paid to the loss of local sustainability and reduction in cross-section in the calculation of the elements. Papers describing the application of the developed theories of stress-strain state in the structural calculations using finite element systems were reviewed
10.34910/ALF.4.1
69
light steel thin-walled structures
thin-walled bar
finite-element method
stress strain behavior
local stability
https://alfabuild.spbstu.ru/article/2018.3.2/
1_4.pdf
REV
RUS
24-32
Peter the Great St.Petersburg Polytechnic University, Russian Federation
Barabkin
Danil
d.bar74@gmail.com
195251, Russia, St. Petersburg, Polytechnic St., 29
Peter the Great St.Petersburg Polytechnic University, Russian Federation
Aidarkhanov
Artem
Liafor@mail.ru
195251, Russia, St. Petersburg, Polytechnic St., 29
Prospects for the development of the transport system of St. Petersburg
Nowadays, there is a problem of development of the transport system in many large cities. Timely and balanced development of the transport system is an integral part of the development of any city, allowing the functioning of all modes of transport in order to maximize the satisfaction of transport needs at minimal cost. The system of St. Petersburg isn't an exception. The purpose of the work is to analyze the types of existing transport networks and the transport system of St. Petersburg, to consider its prospects and to identify the most appropriate ways of development. In the article have been considered various types of the transport networks, their merits and demerits, based on world experience. The method of the analysis and synthesis has considered the current state of the transport system of St. Petersburg. On the basis of the data reviewed, the objectives have been set and specific solutions have been proposed for the development of the transport system, taking into account its social and economic purpose.
10.34910/ALF.3.3
711.4-112
public transport systems
urban road networks
transportation
transport infrastructure
traffic congestion
mass transportation
traffic infrastructure
townplanning
https://alfabuild.spbstu.ru/article/2018.3.3/
3_3.pdf
REV
RUS
33-45
Peter the Great St.Petersburg Polytechnic University, Russian Federation
Maiatskaia
Anastasiia
iforsist@gmail.com
195251, Russia, St. Petersburg, Polytechnic St., 29
Peter the Great St.Petersburg Polytechnic University, Russian Federation
Cherkasova
Viktoriya
viktoria.cherkasova99@mail.ru
195251, Russia, St. Petersburg, Polytechnic St., 29
Designing the territory of the cottage village in AutoCAD Civil 3D
Nowadays each company that builds infrastructure facilities, needs to lay new federal routes, highways, local roads, bridges, tunnels, and the design of various complex territory. And the key point in this process is designing. Thus, a certain set of tasks has been formed, for which there are specialized solutions. AutoCAD Civil 3D is a new and original product in the building software market. This program is becoming more popular in the design organizations involved in the development and design of overall plans. Objective of the study is to consider the stages of designing the territory of a cottage village and how AutoCAD Civil 3D can automate this process. The basic functions of the Civil 3D discuss in this article. These functions help to automate and facilitate the work of specialists at individual stages of designing the territory of a cottage village. By analyzing the stages designing and exploration functions of the AutoCAD Civil 3D, it was determined that this software package allows to significantly reduce the project time and reduce labor costs, while the quality of work remains at a high level. The main feature of the program is the modeling of the territory with all the facilities, with the ability to dynamically update the drawings when designer making changes to survey results to the release of project documentation.
10.34910/ALF.3.4
69.051
AutoCAD Civil 3D
civil engineering
designing process
computer simulation
computer aided design
construction project
automation
3D modeling
https://alfabuild.spbstu.ru/article/2018.3.4/
4_3.pdf
REV
RUS
46-54
Peter the Great St.Petersburg Polytechnic University, Russian Federation
Nadtochii
Nikita
Nekitmusicant98@yandex.ru
195251, Russia, St. Petersburg, Polytechnic St., 29
Peter the Great St.Petersburg Polytechnic University, Russian Federation
Lyubomirskiy
Arseniy
tsap.vasia@yandex.ru
195251, Russia, St. Petersburg, Polytechnic St., 29
Technology «slurry wall» in underground construction
Nowadays it is observed overpopulation of the large cities. That entails shortage of the space. This is the main problem of modern megalopolises. This problem requires a serious approach for finding its safe solution. The successful use of " slurry wall " technology helps in underground construction. The purpose of the article is to revealing the advantages and disadvantages of technology "slurry wall". In the theoretical part of the study the main issue was classification of сonstruction technologies, and also its advantages and disadvantages. Based on the analysis of scientific articles considered the classification of technologies, there are 2 methods of making a monolithic reinforcement wall: a dry process and a wet way. The recommendations made as a result of this study have been implemented decrease in negative impact on the environment – this is the main shortcoming of "slurry wall".
10.34910/ALF.3.5
624.012.3.4
slurry wall
сonstruction technologies
underground construction
buildings
materials properties
reinforcement
supporting structures
geology
https://alfabuild.spbstu.ru/article/2018.3.5/
5_3.pdf
REV
RUS
55-64
Peter the Great St.Petersburg Polytechnic University, Russian Federation
Samoilov
Kirill
ikiryhas@gmail.com
195251, Russia, St. Petersburg, Polytechnic St., 29
Peter the Great St.Petersburg Polytechnic University, Russian Federation
Antipina
Anastasiya
nanaan01@gmail.com
195251, Russia, St. Petersburg, Polytechnic St., 29
Lightweight concrete as a material for wall construction
Development of energy-efficient buildings materials is a relevant problem of modern construction. Concrete is very popular today because it has unique properties and can satisfy any requirements of the builder. But even this material has essential disadvantages. Therefore, we can observe tendencies of improvement of its characteristics and fabrication technique for the last decades. New types of concrete such as lightweight concrete quickly gain popularity. The purpose of the research was to determine the feasibility of using lightweight concrete as wall materials. Advantages and disadvantages of this concrete had been identified through the analysis and review of scientific publications. It is on the one hand the small weight, low heat conductivity and a high immunity to noise interference, and on the other hand high moisture absorption and low strength which limits their use in the bearing structures. The study showed prospects to produce more durable lightweight concrete which could find application in civil and industrial engineering and in the construction of buildings for special purposes. The derivations were made concerning expediency of their application had been presented as a result of the research.
10.34910/ALF.3.6
691
civil engineering; buildings materials; concretes; energy efficiency; light weight concrete; construction; physical property; concrete components
https://alfabuild.spbstu.ru/article/2018.3.6/
6_3.pdf
REV
RUS
65-75
Peter the Great St.Petersburg Polytechnic University, Russian Federation
Novik
Vasilina
vasilina.novik@yandex.ru
195251, Russia, St. Petersburg, Polytechnic St., 29
Peter the Great St.Petersburg Polytechnic University, Russian Federation
Belskii
Efrem
belskiy.efrem@gmail.com
195251, Russia, St. Petersburg, Polytechnic St., 29
Operating ability of motor-roads
This article examines the indicators of the highways operational condition and their dependence on the vehicles traffic intensity, the traffic type, the vehicles speed and the degree of the road loading, as well as the impact of these indicators on road safety. The purpose of this article was to determine the dependence of the roads operating ability on the impact of the transport, which is moving along them.It's determined that there is direct dependency between car weight parameters variation and increasing strength and efficiency requirements for road surfaces. The research revealed that most car accidents occurs under the influence of particular adverse factors and their combinations. As a result of the analysis, the relationship between the weight parameters changes of cars and the working capacity of road surface dressing has been established.
10.34910/ALF.3.7
625.7
motor-roads; traffic volumes; traffic capacity; driving speed; type of traffic; actual carrying capacity; traffic stream; road pavement
https://alfabuild.spbstu.ru/article/2018.3.7/
7_3.pdf
REV
RUS
76-81
Peter the Great St.Petersburg Polytechnic University, Russian Federation
Atavin
Ilya
ilya_region51@mail.ru
195251, Russia, St. Petersburg, Polytechnic St., 29
Repeated deformation of the thin-walled metal structures
Light steel thin-walled structures are gaining great popularity in the construction industry. The development of metallurgy and the increase in the quality of the manufacture of parts provides engineers with the ability to invent and introduce new forms of profiles on the basis of numerical and full-scale tests.
10.34910/ALF.3.8
69
structural mechanics
light steel thin-walled structure
cold-formed profile
finite-element method
https://alfabuild.spbstu.ru/article/2018.3.8/
8_3.pdf
REV
RUS
82-85
Peter the Great St.Petersburg Polytechnic University, Russian Federation
Babaevskaya
Olga
olga-babaevskaja@rambler.ru
195251, Russia, St. Petersburg, Polytechnic St., 29
Modeling of behavior of semisubmersible rig at installation on the Lunsky field
Objective: Review and analysis of engineering problems with the installation of a semisubmersible drilling rig in the set point of the water area and search of their decision. In article the platform construction is described. The analysis of external conditions of the area of installation and the restrictions defining working capacity and safety of operation of the semisubmersible drilling rig is made. Following the results of the analysis the task of determination of parameters of positioning system of the drilling rig and its optimization for the objective of expansion of range of external influences has been set that leads to increase in volume of the works performed during the season and economy of financial means. The method of the solution of an objective by mathematical modeling is offered.
10.34910/ALF.3.9
502.1
boring apparatus
mathematical modeling
anchor mooring system
optimization
https://alfabuild.spbstu.ru/article/2018.3.9/
9_3.pdf
REV
RUS
86-89
Peter the Great St.Petersburg Polytechnic University, Russian Federation
Tretyakova
Irina
tretyackova.irina@mail.ru
195251, Russia, St. Petersburg, Polytechnic St., 29
The implement of a self-elevating drilling rig in the sea of Okhotsk
The main aim of this work is the implement of a self-elevating drilling rig on the appointed space of water area through solving engineering problems. During this working process some external conditions of the area, examined basic constructional peculiarities of jackup rig were analysed. The mathematical modeling of a self-elevating platform's state in the moment of implementing on the drilling point under an external pressure was examined. The system of drilling installation's ballasting and modeling of ballast tank's filling in using abutting system's pressing into a bottom soil were pointed out. Moreover, the hydro-technical calculation method was analyzed. The aim of this method is testing of building's strength and steadiness in a working statement and determination of the maximum-pressure affected fundamental columns.
10.34910/ALF.3.10
626
Shelf,self-elevating drilling rig
cross arm
stability
external load,mathematical modeling
stiffness
ballasting
https://alfabuild.spbstu.ru/article/2018.3.10/
10_3.pdf