bluuebunny/crossref_metadata_2025_split huggingface dataset:
Challenges in managing green building projects from the view of the contractors: An exploratory study in Vietnam
Authors: Tran QuangDung 
Published: July 2020

Abstract
Success of green building projects is significantly dependent on the capacity of all stakeholders. In order to improve the success of such projects, this study seeks to gain a better and deeper understanding of the critical challenges facing the contractors in executing green building projects. The methodological framework used consists of a literature review and a questionnaire survey of green construction experts in Vietnam. The data collected from 163 expert responses was used to conduct the test of Kendall’s coefficient of concordance, Chi square tests, ANOVA and mean ranking analysis. The results indicate that the top five challenges facing the contractors in executing green building projects are “lack of legal regulations and technical codes, standards, guidelines on green building”, “more difficult to early establish a competent, integrated, multidisciplinary green project team”, “more difficult for comprehending the green specifications”, “more difficulty in the selection of competent subcontractors in providing green building services”, and “shortage of reliable green building methods, materials, technologies, and equipments in the market.” The findings bring out valuable implications for the government, the industry practitioners and stakeholders in improving the success of the green building projects in the future. Given the limited empirical studies on issues influencing the success of delivering green building projects, the present study also makes a contribution to the body of knowledge.
Prospects of using Task management in design
Authors: Stepanova Anastasia , Shilova Liubov 
Published: July 2020

Abstract
The article discusses the possibility of organizing project management in design using the Revit and Wrike task manager, a corporate online service for collaboration and project management that allows users to plan projects, prioritize tasks, track the schedule of their implementation and interact with the team. At the same time, the algorithm for calculating time by tasks was developed in the Dynamo environment using the Python language.
The impact of proptech on real estate industry growth
Authors: Siniak Nikolai , Kauko Tom , Shavrov Sergey , Marina Ninoslav 
Published: July 2020

Abstract
The real estate industry is currently undergoing a digital transformation that not only changes its nature in terms of the markets and work environments, but is also influencing its growth. What are the main trends and concerns related to this transformation? To what extent is the real estate industry already prepared for this? This paper reviews the situation in terms of the emergence of a phenomenon known as PropTech. PropTech is characterized by the massive implementation of emerging technology such as home matching tools, drones, virtual reality, building information modelling (BIM), data analytics tools, artificial intelligence (AI), Internet of Things (IoT) and blockchain, smart contracts, crowdfunding in the real estate sector, fintechs related to real estate, smart cities, regions, smart homes and shared economy. This survey of changes in the real estate industry due to PropTech covers four areas: (1) PropTech applications in the real estate industry; (2) implications of PropTech for real estate market transparency; (3) how PropTech could give a region or a company a competitive advantage; and (4) concerns on the wider implications of these changes on a labour market and education. In a plausible scenario, changing the real estate technologies could change system dynamics and improve real estate market transparency. Moreover, it can be asserted that, in a broader sense, PropTech is beneficial for territorial competition and territorial growth strategies. And lastly, under different institutional arrangements, PropTech can affect the changing structure of the real estate market, the demand for hi-tech, new skills as well as emerging policy challenges for the real estate industry.
Establishment of commercial real estate placement and management system in the city
Authors: Khrustalev Boris , Chudaykina Tatyana , Ayupova Zarema , Zhelihovsky Denis 
Published: July 2020

Abstract
Most often, new buildings are the whole areas which grow on the place of former waste grounds or departmental territories. These are the sites, remote from the centre, having nothing in common with trade or business parts of the city. Design codes oblige to put public establishments in the projects. These buildings located in “dormitory area” are also offered by builders as “favourable investments”. Purchaser’s choice of an apartment is very important. In these conditions people are going to live for a long time or may be all their life. That is why much depends on it. It is, of course, the conscious choice. Materials and methods. Methods of the research are theoretical analysis and empirical research, in particular the analysis of statistical data, as well as description and grouping of data. The information base for studying this problem were literary sources (textbooks, manuals) on the problem of enterprises activities, scientific articles, monographs, electronic resources. Methodological basic of the research are such scientific methods as description, comparison, classification. Results. This article analyses the placement and management of commercial real estate in residential many-storeyed buildings, which is considered both on the positive and on the negative side. A general analysis was made, classifications, characteristics were given, as well as patterns of placement of commercial objects were revealed.
Digital twins of complex technical systems for management of built environment
Authors: Bolshakov Nikolai , Badenko Vladimir , Yadykin Vladimir , Celani Alberto , Fedotov Alexander 
Published: July 2020

Abstract
The development of digital technologies captures a significant part of the economy and production, as well as business and management processes. Asset owners are given the opportunity to become additionally owners of digital assets, while the need for conceptual approaches and digital asset management is growing. With the increasing application of Building Information Modelling (BIM) for asset management within architecture, engineering, construction and owner-operated (AECO) sector, BIM-enabled asset management has been increasingly attracting more attentions in both research and practice. The problem associated with the development and production of facilities is related to the discrepancy between as-built as-designed and as-is facilities or complex technical systems. During the stages of design, construction, operation and maintenance (O&M), the actually manufactured (i.e. as-built) complex technical object (or production infrastructure) differs, sometimes significantly, from the designed (as-designed), and at the same time inconsistency between the created production and production infrastructure within which it should operate grows. Solving the problem of discrepancy between the actually created and designed facility or the complex technical system, in the absence of digital technologies, requires considerable time for the so-called “trial operation”, during which the discrepancies are eliminated and a mechanism for managing production and production infrastructure in real conditions is developed. With the development of the digital economy, the need for digitalization of asset management is growing. An analysis of existing information technologies shows that there is a possibility of reducing the cost of production and operation of an asset by concentrating the main costs at the design stage. The article discusses basic approaches to organizing the lifecycle management of technical systems, production and infrastructure in the context of global digitalization which become a useful tool for reduction of trial operation time. Further directions of research are formulated
Solutions to deal with flooding by using green buildings in Vietnamese urban areas from Japanese experience
Authors: Van Giang Nguyen , Thanh Dat Nguyen 
Published: July 2020

Abstract
One of the major problems of big cities in Vietnam is deep flooding in the rainy season, frequent traffic jams, fewer green areas, green parks are narrowed or exploited for commercial exploitation and services. The above consequences are due to many reasons such as rapid urban development, encroachment of rivers and streams that break the natural landscape, lack of synchronous planning … there is still a lack of reasonable technical solutions. Japan is a country with a lot of experiences in flood prevention, about preserving a safe and close environment to nature. These solutions can be an idea for strategic decision makers, governments and the whole community to refer to Vietnam, especially big cities like Ho Chi Minh City learning and applying. Here are some experiences from Japan analyzed and opened by the author to contribute ideas for our city to become more civilized and worth living.
Mechanical behavior of Vinh Long soil mixed with cement
Authors: Thanh Truong Quang , Linh Nguyen Ngoc , Quynh Nhu Nguyen Thi 
Published: July 2020

AbstractRecently, deep soil mixing has been constructed in Vietnam. However, the researchers applying this solution to reinforce soft ground with geological conditions of Vinh Long are not common. This paper concentrates on study of mechanics of soil samples which are compatile with Vinh Long geological conditions. Experiments on unconfined compressive strength were performed to analyze mechanical behaviors in the duration of curing samples. Soils taken from two layer of researching area were mixed with cement with the content from 150 kg/m3to 250 kg/m3, then were curing in duration of 7 days, 14 days, 28 days and 60 days. Results of tests at specified timeline show that unconfined compressive strength of most mixing samples increases with the cement content and curing period. The secant modulus of elasticity is determined from the deformation resistance test, then the loading capacity of samples can be deduced. The secant modulus of elasticity increases when the unconfined compressive strength increases. This article is a valuable reference in the design of cement-reinforced soft soil for application in infrastructure engineering.
Integrated design and construction approach to hydrotechnical structures in Eritrea
Authors: Kozlov Dmitry , Ghebrehiwot Anghesom 
Published: July 2020

Abstract
During the process of design and construction of water management facilities and structures, such as reservoirs, dams, spillways, water intakes, etc., it is important to pay attention to the specific conditions of a particular country. Since the rapprochement among Eritrea, Ethiopia and Djibouti in 2018, the geopolitical dynamics of the region has changed to a different level. These regional changes will significantly contribute to the development of extractive and processing industries, agriculture, trade, construction and tourism in Eritrea. However, all these developments unquestionably require sustainable and efficient water use, intensive development of water management and water technologies, among others. Based on the specific conditions of Eritrea, identification of existing main trends in the design and construction of water management facilities and structures followed by formulation of practical recommendations and future directions has been the focus of this study. Reliable and relevant information has been processed and analysed using general scientific research methods, including generalization and analysis, synthesis and analogy, historical and hypothetical methods of cognition. This paper comprehended that the design, construction and operation of water management structures should consider the predominantly hot climatic condition of the country, while observing the main development trends in the field. These activities help in ensuring reliable and trouble-free operation of hydraulic structures, using modern and progressive achievements of hydraulic engineering science and global practice in the field of dam engineering and construction of culverts taking into account environmental requirements and norms, and using modern high-performance mechanisms and methods of production of hydraulic works. Moreover, the hydrological and water management conditions of Eritrea are characterized by limited water resources, poor knowledge of water bodies, and lack of reliable hydrological, meteorological and geological information. Under these circumstances, it would be necessary to use mathematical modelling for understanding and forecasting hydrological processes in river basins.
River channel deformations in the area of damless water intake
Authors: Uralov Bakhtiyar , Xidirov Sanat , Matyakubov Bakhtiyar , Eshonkulov Zokhidjon , Norkulov Bakhodir , Gayur Abdulatif 
Published: July 2020

Abstract
A mathematical model of the unsteady uneven movement of the river flow in the area of the damless water intake, flowing in deformable channels, was developed and numerically implemented. In the developed model of the deformation of the river channel, flowing on easily eroded beds, adapted formulas of the transporting ability of the flow are used, the hydrodynamic equations of motion and continuity of the flow, deformation of the channel, and sediment balance. To close the system of differential equations, we use the adapted formula of the conveying ability of the flow–Benold. In the calculations, the non-erosion speed was taken according to the formula C.E. Mirtschulava, taking into account standard values of adaptive coefficients. It is suitable for describing deformation processes, taking into account the drift of dredging slots. The model contains the minimum number of equations and empirical constants. In the present work, a numerical model is proposed for predicting channel processes in river beds in the area of damless water intakes and is verified on the results of experimental studies. The figures show sequential deformations of the channel, arising due to natural causes, as well as due to channel adjustment and treatment works (discharge of soil from the supply channel into the river). As can be seen from these figures, the channel from multi-sleeve is gradually turning into one-sleeve. It has been established that after 1 year of observation at low water, as a result of discharge of sediment from the sewage treatment works, the river ducts die off. These ducts are observed only in the flood. Note that below the Karshi main channel (KMCh), the left bank eroded by about 150 m. After a 10-year course, the low-water course turned into a one-arm riverbed. As a result of the erosion of the left-bank islands, it turned into the river itself. During the flood, there are also no pronounced sleeves, a significant erosion of the left bank is noted, up to 700 m. After that, this bank was strengthened. In the future, the channel process did not undergo significant changes. Towards the end of the 10th year of observation, the channel broadened somewhat, and the flood depth decreased in the flood. Comparison of the results of field and numerical studies shows that the developed model gives good results. For low-water conditions, coincidence is better than for flood conditions. During the flood, under natural conditions, somewhat greater depths are observed on the floodplain than in the calculations. It should be noted that both in calculations and in kind:
- there was a significant erosion of the left bank below the KMCh;
- the channel of the Amudarya river in the considered section from multi-sleeve turned into practically one-sleeve.
Stability of dam slopes of phosphogypsum sludge collectors
Authors: Sultanov Takhirjon , Fayziev Khamidkhon , Toshmatov Elyor , Zokirov Ilkhomjon 
Published: July 2020

Abstract
The results of calculations of the enclosing dam stability of phosphogypsum sludge collectors are presented in the paper. The stability calculations were carried out according to the “RUZO” program; they are based on the method of circular-cylindrical sliding surfaces under the action of basic and seismic loads. The main objective of this work is to determine the minimum safety factors for dam slopes of a given transverse profile under known loads and characteristics of the dam body material. To develop a rational profile of collector dams, 9 options of design models of the structure and its base were considered. The body of the enclosing dams of collectors of considered options consists, as a rule, of two elements: the primary floodwall built of earth materials, and secondary dams constructed according to a different build-up schemes from stored materials. Secondary dams are constructed from stored phosphogypsum by the method of layer-by-layer filling and compaction. The calculations showed that in all considered schemes the minimum safety factors under the action of basic and seismic loads are higher than the standard values. The maximum permissible values of the slopes are established with an allowable margin of safety, thus, the stability of dam slopes in all considered options of the phosphogypsum collector is ensured under basic and special combinations of loads.
Physical modeling of the filtration process through the dam base
Authors: Shaazizov Farrukh , Shukurov Diyor 
Published: July 2020

Abstract
In this article, the results of model studies to determine the value of filtration in different soil layers that form the foundation of the dam for different filling of the reservoir are given and empirical dependences of the filtration level on the amount of filling of the reservoir are given. When conducting research and evaluating the ongoing filtration processes at the dam base, experimental research methods were used using well-known principles of physical modeling on a specially modeled hydraulic model unit. When analyzing the results of experimental studies, methods of mathematical statistics were applied and graphical and empirical dependences were obtained showing the relationship between the pressure in front of the dam and the filtration pressure at the base of the dam. Under the conditions of the physical model, for different filling of the reservoir, the filtration values in different soil layers composing the dam base are determined and empirical dependences of the filtration level on the reservoir filling are obtained.
Assignment of minimum depth of piled foundation in structurally unstable permafrost soils factoring in emergency situations
Authors: Rabinovich Mikhail , Zavodova Alina , Arnautova Anastasiya 
Published: July 2020

Abstract
The set-out task is presented on the example of permafrost soils. Presented results show temperature regime calculations of the soil base of a building constructed according to 1 principle factoring in thermal effects of the underground collector, above-ground heat supply system and the emergency blow-out of high-temperature fluid from communications. Changes in the temperature regime of soils in the soil base of the building are assessed in the article. Article gives recommendations for assignment of minimum depth of piled foundations under presented conditions.
Formation of soil sinkholes in the form of a collapse pipe
Authors: Makeeva Tamara , Trofimov Vitaly 
Published: July 2020

Abstract
The mechanism of formation of sinkholes of the ground surface in the form of a collapse pipe, which characteristic feature is the existence of almost vertical walls with a sinkhole depth exceeding its lateral dimension, is considered in the article. The authors solve the geo-mechanical problem of stress distribution in the rock mass near the underground cavity that initiates the formation of the sinkhole. The extreme parameters (geometrical and strength) which make it possible to initiate the progressive destruction in the form of a vertical pipe of destruction, are defined according to the integrated criterion of durability. The ratio, hat relates the depth of the cavity location, the horizontal size of the sinkhole, the strength properties of the rocks (adhesion, internal friction angle), and the lateral pressure coefficient in the massif is obtained.
Operational efficiency of water damless intake
Authors: Bazarov Dilshod , Markova Irina , Norkulov Bekhzod , Isabaev Kasimbek , Sapaeva Mukaddas 
Published: July 2020

Abstract
An improved hydraulic method for increasing the efficiency of operation of a damless water intake is presented. Physical picture of the movement of bottom and surface sediments during flow division in the damless water intake ABMCh (Amu-Bukhara machine channel). Analysis of the distribution of sediment along the channel of the channel showed that clay particles of suspended sediment <0.005 mm increase from the inlet to the main structure of the ABMCh from 15% to 36%. Dusty particles of suspended sediment d = 0.05 also increase from inlet to G.P. ABMCh from 38% to 66%. Sandy sediment particles d = 0.05 to 0.25 mm, on the contrary, decrease from 3% to 71%, and sediment particles d> 0.25 mm decrease from 1.30 to 0.15%. It is substantiated that the angle of the flow outlet to a greater extent influenced the formation of vortex zones at the entrance to the outlet. The size and intensity of the vortices at the inlet, in turn, determined the pressure loss, as well as the amount of sediment deposited at the water inlet, by the amount of sludge entering the outlet. The analysis of the experiments showed that the optimal threshold angle to the shore is (β = 30°, 45° 60°.; It is recommended that when setting the water intake mode it is necessary to take into account the fact that the reduction of the discharge angle to reduce the pressure loss at the inlet to the water intake, the latter is more intense carried by precipitating suspensions. It has been established that intense deformations of the Amudarya river channel occur in the area of the ABMCH water intake: Due to dredging of the channel by the dredgers, the pulp is thrown into the river channel, it turns out, as it were, storage of sediment on the right bank. This, in turn, leads to a narrowing of the river channel and siltation of the supply channel, which contributes to the movement of the channel to the left bank and complicates the intake from the river into the channel. Taking into account the complexity of the processes occurring during the division of the flow, it is necessary to consider the qualitative and quantitative aspects of this phenomenon ‘in pure form‘, without affecting the moving flow of various anti-ballistic devices. To improve the conditions of water intake and the quality of the incoming stream, an improved scheme with new structural elements is proposed.
A novel approach using sustainable structures in preventing coastal erosion and forming sandy beach in Vietnam
Authors: Phan Quang-Minh , Nguyen Viet-Phuong , Hoang Tuan-Nghia , Vu Ngoc-Tru 
Published: July 2020

Abstract
A new solution using ultra-high performance concrete (UHPC) sheet piles was a hard wall structure combined with gabion groyne dams for the purpose of shore protection, sand accretion, and tourist beach creation was proposed in this study. The proposed approach was then applied to meet the both shore protection and sandy beach generation requirements of private Rung Duong resort project in Ba Ria-Vung Tau, Vietnam. The UHPC sheet piles reinforced by fiber reinforcement polymer (FRP) installed in form of a vertical wall were designed and constructed for the shore protection purpose. Together with the later built gabion groyne dam system, the combined structure brought a very good coastal protection effect. As a result observed from Rung Duong resort, the shoreline was pushed back out very far from the resort, while sandy beaches in front of the resort were formed and expanded widely.