scholarly journals Quantum risks of the extreme temperatures implementation in london

2019 ◽  
Vol 135 ◽  
pp. 01068
Author(s):  
Zhanna Mogiljuk
Keyword(s):  
Statistical Analysis ◽  
Construction Projects ◽  
Global Climate ◽  
Extreme Temperature ◽  
Road Construction ◽  
Engineering Systems ◽  
Extreme Temperatures ◽  
The Road ◽  
Statistical Studies ◽  
Temperature Loads

The article deals with current problems of the road construction projects adaptation to the global climate change realities. It is shown that the existing regulations do not take into account the risks of extreme thermal processes. The method for the events statistical analysis of the extreme temperature realization are presented. The high-resolution statistical studies results of previously unknown regularities of the maximum and minimum temperatures intensity fluctuations evolution in the period from 1973 to 2009 are presented. Quantitative forecasting of tendencies in realization of the maximum and minimum daily temperatures for the period of all life cycle of buildings is shown. These estimates are intended to account for extreme temperature loads in the design of road construction objects and engineering systems. The paper first presented quantum regularities of the air temperature variations in the surface layer of the atmosphere obtained by the author and previously unknown. As an example, the article deals with the statistical analysis of the extreme temperatures variations in London. The graphic materials over the statistical studies of the maximum and minimum temperatures intensity evolution a period of more than 36 years are presented. The results of studies of integral and differential trends into the maximum and minimum temperatures evolution are given. The article deals with the forecast of the warming expected rate in London until 2067.

scholarly journals Identification of geodetic risk factors occurring at the construction project preparation stage

2019 ◽  
Vol 9 (1) ◽  
pp. 14-17 ◽  
Author(s):  
Magdalena Kowacka ◽  
Dariusz Skorupka ◽  
Artur Duchaczek ◽  
Paweł Zagrodnik
Keyword(s):  
Risk Factors ◽  
Construction Projects ◽  
Expert Knowledge ◽  
Construction Project ◽  
Road Construction ◽  
Construction Process ◽  
The Road ◽  
Initial Stage ◽  
Preparation Stage

AbstractThe work contains information on the implementation of surveying works in the road construction process. The aim of the research was to identify geodetic risk factors occurring at the stage of preparation of a construction project, the presence of which can greatly disrupt the undertaking such as the road construction. The research was carried out on the basis of expert knowledge, documentation obtained from various road construction projects and the analysis of disturbances at the initial stage of works.

Reclamation of the Temporary Land use for the Road Construction

2013 ◽  
Vol 726-731 ◽  
pp. 4965-4969
Author(s):  
Guo Zhan Luo ◽  
Jian Wang ◽  
Yu Peng Liu
Keyword(s):  
Construction Projects ◽  
Land Reclamation ◽  
Road Construction ◽  
Renewable Resource ◽  
Land Resource ◽  
Land Productivity ◽  
The Road ◽  
Resource Protection ◽  
Large Acreage ◽  
Investigation And Study

Land is limited and renewable resource, also the renewability of many composites of land productivity is limited. A large acreage of land is occupied temporarily or permanently by road construction projects. In the later stage of road construction projects, land reclamation is a key issue for land resource protection. Basing on investigation and study, this paper is to conclude the land reclamation methodology and key technologies, and provide technical reference.

scholarly journals Low-Cost Road Construction and Rehabilitation in Unstable Mountain Areas

2021 ◽  
Vol 9 (9) ◽  
pp. 1152-1156
Author(s):  
Manish Jagannath Datar
Keyword(s):  
Traffic Safety ◽  
Financial Management ◽  
Construction Projects ◽  
Road Traffic ◽  
Low Cost ◽  
Road Construction ◽  
Research Problem ◽  
Mountain Areas ◽  
The Road ◽  
Road Traffic Safety

Abstract: The mountain roads are impacted by social, environmental and economic challenges. The financial management around the road construction and rehabilitation requires fine management and administrative skills to be done effectively by the local and the federal authorities. The objective of this study is to understand the factors affecting the low-cost road construction and rehabilitation in the unstable mountain areas and to analyze the solutions to the specific barriers. The materials and methods used here is a best evidence review focusing on the existing literature that emphasizes on the above-mentioned research problem. Global evidence has been used in order to draw a greater idea and explanation about the research topic. The results focus on the importance of technology leadership, financial management, risk control and mitigation, sociocultural benefits and socioeconomic scalability of the low-cost road construction and rehabilitation projects. The workforce management and stakeholder relations are very important as well for the effective running of the construction projects without any interference. The partnerships between the public and the private organizations is very much vital for ethical and regulatory compliances which is one of the major findings of the study. The sociocultural impact and the road traffic safety considerations are to be assessed properly in order to prevent and mitigate any project risk which is also a very important finding.

THE FACTORS MILITATING INTERNAL STAKEHOLDERS ON ROAD INFRASTRUCTURE PROJECTS

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Nokulunga Xolile Mashwama ◽  
Winnie Mushatu ◽  
Didibhuku Thwala ◽  
Clinton Aigbavboa
Keyword(s):  
Construction Projects ◽  
Service Providers ◽  
Construction Project ◽  
Road Construction ◽  
Successful Implementation ◽  
The Road ◽  
Secondary Sources ◽  
Regulatory Bodies ◽  
Internal Stakeholders ◽  
The Impact

There are numerous participants involved in construction projects including the client or sponsor of the project, regulatory bodies, contractors, consultants, ward councilors, community who affect or become affected by the project. Stakeholders can affect the road construction positive or negatively. Stakeholder’s engagement is done to avoid unnecessary conflicts and controversies and to attain the desired successful implementation of the project. The paper aims to identify the impact of internal stakeholders on road construction project. Quantitative approach was adopted for this study. 100 questionnaires were distributed and 76 were collected and analyzed. The data was collected through primary and secondary sources. Factor analysis was conducted, Correlation matric coefficients has been conducted to ensure visibility of coefficients greater than 0.3 and Kaiser-Meyer-Olkim (KMO) and Barlett’s test were conducted. From the findings it transpired that late payment to service providers; failure to verify contractor qualification; Client knowledge to review design documentation; inadequate involvement during construction project, lack of understanding project feasibility. The participation of stakeholders encourages the public to share their knowledge with the regulatory authorities, fosters better-informed decisions and decreases likelihood of project failure. Early stakeholder’s involvement can add benefits of diffusing opposition to a project.

scholarly journals Causes of Delays in Road Construction Projects in Laos

2020 ◽  
pp. 19-32
Author(s):  
Bounthipphasert Soumphonphakdy ◽  
Shozo Nakamura ◽  
Toshihiro Okumatsu ◽  
Takafumi Nishikawa
Keyword(s):  
Construction Industry ◽  
Construction Projects ◽  
Road Construction ◽  
Infrastructure Development ◽  
The Road ◽  
Road Users ◽  
Negative Effect ◽  
Survey Results ◽  
Causes Of Delays ◽  
Financial Issues

One of the most important sectors in infrastructure development in Laos is road construction. However, many road construction projects in Laos suffer from extensive delays. This causes damage such as recurring problems in the road construction industry, and has a negative effect on the success of road construction projects in terms of schedule, cost, quality, safety and the amenity of road users. The goal of this study is to determine the main causes of these delays and to offer remedies. To identify the causes of delays, a questionnaire is designed by modifying one used to measure causes of delays in road construction projects in the West Bank in Palestine and in consultation with engineering experts with more than 10 years of experience in Laos road construction projects. A total of 53 causes of delay are identified as important in Laos. Questionnaire respondents included 35 contractors, 31 owners and 24 consultants in total. The survey results indicate that the five top factors causing road construction delays are: Contractor cash flow; Delayed payment by owner; Difficulties in financing project by contractor; Financial issues related to owner; and Insufficient equipment and vehicles for the work.

scholarly journals Influence of “Nicoflok” Polymer-Mineral with Portland Cement on Granular Soils and Recycled Asphalt Material

2020 ◽  
Vol 15 (5) ◽  
pp. 94-117
Author(s):  
Mahdi Zirak Baroughi ◽  
Amir Hassan Rezaei ◽  
Hooshang Katebi
Keyword(s):  
Portland Cement ◽  
Construction Projects ◽  
Soil Stabilization ◽  
Road Construction ◽  
High Volume ◽  
Recycled Asphalt ◽  
The Road ◽  
Subgrade Soils ◽  
Asphalt Materials ◽  
Under Construction

In road construction projects, due to the high volume of soil materials, the costs of supplying and transporting high-quality materials are very high, they may also include the crossing between different geotechnical lands with different types of soils and soil stabilization used to modify resistance characteristics of soil materials in different layers of the road. Addition of a stabilizing agent can improve the properties of aggregates and subgrade soils. In this study, the effect caused by the combined action of polymer-mineral composition “Nicoflok” and cement stabilization on the strength characteristics and durability of local materials, adopted from under-construction Ilkhchi highway project, was investigated. In addition, the effects of stabilizers on the recycled asphalt materials was studied to assess the possibility of using them in the pavement structure. Samples with 0, 0.5, 0.9 and 1.3 percent of Nicoflok combined with varying percentages of cement content were made and CBR tests were conducted after curing. Strength degradation of samples under 50 cycles of freeze-thaw was also investigated. The results show that addition of cement- Nicoflok admixture to the subgrade soil considerably increases CBR values, which leads to reduction of the required material amount. The efficiency of this polymer with Portland cement depends on several factors, such as the amount of cement, curing time, size and shape of soil grains. The optimum dosage of Nicoflok was 0.9% mixed with 1% cement. Stabilizing the base and recycled asphalt materials with cement and Nicoflok also improves the long-term performance of the pavement.

scholarly journals Evaluasi Geometri Jalan Menggunakan Uav Dengan Aplikasi Agisoft Photoscanner Pada Jalan Meranti Kampus IPB Dramaga

2021 ◽  
Vol 5 (2) ◽  
pp. 101-114
Author(s):  
Dhia Kamal Irfan ◽  
Sutoyo Sutoyo ◽  
Tri Sudibyo
Keyword(s):  
Construction Projects ◽  
Road Construction ◽  
Horizontal Alignment ◽  
The Road ◽  
A Value ◽  
Road Geometry ◽  
Coordinate Correction ◽  
Two Parameters ◽  
Alignment Analysis ◽  
Bend Angles

There are various road construction projects in Indonesia, but most of these projects still use conventional methods in evaluating road geometry. This study aims to evaluate the geometry of the road using UAV and analyze the accuracy and accuracy of photogrammetry in the evaluation of road geometry. This research took place at Dramaga's IPB Campus on Meranti street and was conducted from April to July 2019. From a series of processes that have been carried out it can produce accuracy of measuring 97,243% and 98,296% across the road for orthophoto results without and with coordinate correction and using GCP. For accuracy in this study obtained a value of 0.858 m so that it can be concluded that the data processing map is included in the class 3 horizontal accuracy. The horizontal alignment parameters analyzed in this study are bend angles, turn radius, and turn length, there are two curves analyzed. For the value of each parameter each turn successively for data without coordinate correction and elevation is 149 °; 90 °; 40.61 m; 53.75 m; 23.39 m; 90.71 m. The results of horizontal alignment analysis for data with coordinate correction are 150 °; 88 °; 30.81 m; 49.34 m; 21.39 m; 89.3 m. The vertical alignment analyzed in this study has two parameters, namely vertical curvature and slope. The value of the analysis results for the two parameters of the two points for results with correction and without correction of coordinates are 16.08%, 17.22%, 53 m, 51 m and 6.88%, 3.77%, 53 m, and 51 m .

scholarly journals Stabilization of problematic silty sands using microsilica and lime

2015 ◽  
Vol 10 (1) ◽  
pp. 61-70 ◽  
Author(s):  
Ali Ghorbani ◽  
Hadi Hasanzadehshooiili ◽  
Masoud Karimi ◽  
Younes Daghigh ◽  
Jurgis Medzvieckas
Keyword(s):  
Compressive Strength ◽  
Unconfined Compressive Strength ◽  
Construction Projects ◽  
Road Construction ◽  
Silty Sand ◽  
Swelling Potential ◽  
The Road ◽  
Compressive Strength Test ◽  
Micro Structures

In this study, to stabilize problematic silty sand soils, Microsilica-Lime admixture was used as an additive. Various samples containing 0, 1, 2, 5, 10 and 15% (by weight) Microsilica and 0, 1, 3 and 5% (by weight) Lime were prepared. To investigate the role of the studied additives on the stabilization of the sandy soils, unconfined compressive strength of the materials and their swelling potential, were considered. To do this, unconfined compressive strength test, California Bearing Ratio, also, swelling tests were carried out. As a result, the unconfined compressive strength of samples with 10% Microsilica and 3% Lime in curing time of 28 days was obtained about 50 times larger than the strength of the untreated samples. On the other hand, the samples stabilized only with 1% Lime showed considerable swelling potential while adding only 1% Microsilica caused a considerable reduce in the amount of swelling. Unconfined compressive strength of samples containing 1% Microsilica and 1% Lime was about 12 times larger than the strength of the untreated samples and these samples showed less swelling potential. Then, these amounts are considered as the optimal amounts, which are used in the road construction projects. Also, the results obtained from scanning the samples using electron microscope illustrated that the Microsilica causes to form crystalline micro-structures in the soil which is the main cause for increasing the strength of stabilized samples.

scholarly journals A Study on Causes of Delay in Road Construction Projects across 25 Developing Countries

2020 ◽  
Vol 5 (10) ◽  
pp. 84
Author(s):  
Ludwig Rivera ◽  
Hilario Baguec ◽  
Chunho Yeom
Keyword(s):  
Developing Countries ◽  
Construction Projects ◽  
Meta Analysis ◽  
Construction Project ◽  
Road Construction ◽  
The Road

Delays in road construction projects due to various reasons are a major problem facing construction professionals. The incapability of finishing projects punctually and within a given budget is a persistent issue worldwide. This study aims to determine the ten principal causes of delay in road construction projects in 25 developing countries across the globe. The study involves two steps. First, the authors compiled information regarding the most frequent delays in a road construction project. Second, they analyzed the intensity of each cause of delay in these projects. Being more accurate in the methodology, given the nature of the information, the researchers used a quasi-meta-analysis for processing the data. Half (50%) of the countries have similar causes of delay, and likewise, 50% of the countries identified the top ten primary causes of delay in road construction projects based on the intensity results. This study uses the results of the intensity. According to the results of the homologation, the lack of experience of the construction manager, inadequate planning/scheduling, and influence on people’s land alongside the road construction project (expropriation for the construction of the project) have more significant impacts than frequent changes in the design (which was listed as the most frequent cause of delay).

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