scholarly journals Tasks and Problems in the Buildings Demolition Works: A Case Study

2015 ◽  
Vol 61 (4) ◽  
pp. 3-18 ◽  
Author(s):  
A. Sobotka ◽  
A. Radziejowska ◽  
J. Czaja
Keyword(s):  
Construction Projects ◽  
Technical Condition ◽  
The Other ◽  
Construction Work ◽  
Preparatory Phase ◽  
Construction Law ◽  
Implementation Problems ◽  
Building Demolition ◽  
Construction Works

In Poland, it often happens that construction objects are subject to demolition work for different reasons. Demolition, according the Construction Law, is defined as a type of construction works and, as such, represents a particular type of construction project. As in other construction projects, a very important phase, in addition to execution of the works, is to prepare, design and plan demolition works. Some demolition activities are covered by appropriate regulations and can be described as typical. On the other hand the technical side of demolition works depends on many factors such as: the type of building, its age, technical condition, type of construction, etc. This article covers the analysis of the stages and tasks in the preparatory phase of the building demolition. This work will also present a description of the tasks carried out during the demolition works based on the example of a historic tenement house located in Krakow. This analysis aims to identify implementation problems and sources of risk that may occur during this type of construction work.

scholarly journals SIMULATION OF BRIDGE CONSTRUCTION WORKS: AN EXPLORATORY STUDY

2014 ◽  
Vol 1 (1) ◽  
Author(s):  
Fahimeh Zaeri ◽  
James Olabode Bamidele Rotimi
Keyword(s):  
Exploratory Study ◽  
Construction Projects ◽  
Resource Constraints ◽  
Discrete Elements ◽  
Bridge Construction ◽  
Complex Interactions ◽  
Simulation Based ◽  
Construction Operation ◽  
Construction Works

Bridge construction projects are associated with uncertainties partly due to sequencing issues, logistics, interactions, and resource constraints. Their construction is mostly cyclic and repetitive, yet complex, requiring innovative approaches to cope with its management. Construction projects planners seek methods to enable them to schedule bridge construction projects in consideration of these constraining factors. The main objective of this research is to develop a concept of a simulation-based modeling approach. It aimed to decide which data in real systems are important for the modeling of an operation, and in which way they must be gathered to help planners approach a proper simulation-based schedule. A case study project based in New Zealand was selected for this paper. It focuses on developing a resource-based model of bridge construction using a launching-girder construction method, taking into account the complex interactions among the project’s components. The discrete elements within the project and steps taken to develop a model are described in this paper. The study enhances knowledge on the applicability of simulation in repetitive construction operation, which in turn can provide more realistic models for scheduling progress.

scholarly journals Diagnostics of the structural failure of sports hall external wall layers

2019 ◽  
Vol 284 ◽  
pp. 02005
Author(s):  
Leopold Kruszka ◽  
Pawel Muzolf
Keyword(s):  
Technical Condition ◽  
The Other ◽  
Diagnostic Process ◽  
Construction Technology ◽  
Structural Failure ◽  
External Wall ◽  
Aerated Concrete ◽  
Structural Failures ◽  
Construction Defects

The paper presents the diagnostics of the technical condition of the external layers of the sports hall walls. Structural failures related to construction defects themselves constitute a relatively small percentage (4.1% in 2017, 5.05% in 2014-2017 [1]), although the main reason for them is the lack of maintaining technological rigors (76.9% in 2017, 68.4% in 2014-2017 [1]). The presented and described case study of the technical condition of the newly built sports hall does not refer to structural failure, but to the reduction of the risk of that failure as a result of non-compliance with construction technology, in particular, in relation to the external walls. Contrary to the design, the walls of the sports hall were made of aerated concrete. According to the declaration of a designer, the contractor neither consulted the changes with the designer nor gain the acceptance of the designer for using aerated concrete instead of the primary proposed and designed brick structure. In addition, aerated concrete curtain walls with a height of about 4.5 m were made without any wall connectors. This resulted in a risk of a structure failure involving the collapse of its curtain walls. The technological requirements for the repairing of the elements of supporting walls as well as the diagnostic process of the other damaged finishing cladding of external walls are also provided in this paper.

Status and Psychology of DBB and BOT Construction Project Participants

2011 ◽  
Vol 71-78 ◽  
pp. 160-166
Author(s):  
Wen Hao Leu ◽  
Andrew S Chang
Keyword(s):  
Performance Studies ◽  
Construction Projects ◽  
Construction Work ◽  
Case Study Method ◽  
Delivery Method ◽  
The Status ◽  
Project Participants ◽  
Work Interaction ◽  
Design Bid Build

Adopting the BOT (build-operate-transfer) delivery method for construction projects has brought opportunities for desired performance. Studies have investigated many issues of BOT projects such as concessionaire selection criteria or risk factors, but the soft issue of the status and psychology change of project participants from traditional DBB (design-bid-build) method is not investigated. This research explored the status and psychology of DBB and BOT project participants and drew implication for performance. By using the case study method, this study selected ten projects in which five from DBB and five from BOT methods; interviewed 36 owners, designers, constructors and other participants in 14 times; and analyzed and compared their design and construction work interaction, designer and constructor status, and owner and concessionaire psychology. It is found that for DBB civil projects performance would be stable because of completed design, more cautious owner, and respected designer that is good to performance. For BOT civil projects, performance would vary and the designer and constructor can better cooperate. The flexibility and vitality brought by the BOT mechanism should be better used to create better performance.

scholarly journals ANALYSIS OF CAUSES OF COST OVERRUN IN COMMERCIAL PROJECTS IN EGYPT.

2020 ◽  
Vol 9 (9) ◽  
pp. 55-64
Keyword(s):  
Construction Projects ◽  
New Technologies ◽  
Cost Overrun ◽  
Construction Sector ◽  
Construction Work ◽  
Major Goal ◽  
Proper Management ◽  
Expected Outcome ◽  
Construction Works

Construction sector is developing every year due to use of new technologies and need of skilled labours to perform required designs. Hence, it is becoming more critical to ensure proper management of construction works to complete the project according to assigned objectives and specifications. The success of any construction work relies mainly on cost, time, and quality of work. Hence, proper management was done in order to ensure completion of projects according to expected and assigned budget. Nevertheless, projects in developing countries are yet suffering from potential overrun of cost due to multiple factors. There are multiple authors in literature that indicated the main problems faced by projects that prevents them from completing the project according to expected budget (Apolot et al, 2012), and (Memon et al, 2012). Hence, it became quite urgent to investigate reasons that lead to overrun of cost in construction works. Therefore, the major goal of this study is to investigate sources of cost overrun in construction projects in Egypt. The study will concentrate mainly on commercial projects due to the fact that most of these projects are extremely expensive and would require proper management to prevent any increase in its cost. The method of data collection is a questionnaire survey that included risk factors collected from previous literature. The expected outcome will be in the form of estimating reasons that lead to cost overrun, and impact of cost increase on performance of construction projects.

scholarly journals Wpływ uczestników procesu inwestycyjno-budowlanego na jego jakość

2018 ◽  
Vol 27 (3) ◽  
pp. 377-386
Author(s):  
Jarosław Górecki ◽  
Jadwiga Bizon-Górecka ◽  
Przemysław Nadolny
Keyword(s):  
Construction Industry ◽  
Construction Projects ◽  
Technical Specification ◽  
Legal Regulations ◽  
Construction Process ◽  
Construction Companies ◽  
Construction Law ◽  
Construction Works

The article indicates that a role and tasks of particular participants of construction projects vary depending on the phase of construction production. The influence of individual entities on the quality of construction production is also diversified. The results of the questionnaire survey conducted among 64 employees of construction companies involved in the implementation of construction projects were presented. They show the opinions of respondents representing the construction industry about a role of participants of the construction process in maintaining the proper quality of construction works. Their impact on the compliance of construction processes with applicable legal regulations was emphasized. The declarations may cover PN/EN standards, Polish construction law, technical specification of performance and acceptance of construction works and other formal and legal requirements and construction production standards.

scholarly journals The S-Curve as a Tool for Planning and Controlling of Construction Process—Case Study

2020 ◽  
Vol 10 (6) ◽  
pp. 2071 ◽  
Author(s):  
Jarosław Konior ◽  
Mariusz Szóstak
Keyword(s):  
Construction Projects ◽  
Construction Project ◽  
Careful Analysis ◽  
Construction Site ◽  
Construction Process ◽  
Financial Flows ◽  
Cumulative Cost ◽  
S Curve ◽  
Construction Works

One of the key tasks of an investor and a contractor at the stage of planning and implementing construction works is to measure the progress of execution with regard to the planned deadlines and costs. During the execution of construction works, the actual progress of the works may differ significantly from the initial plan, and it is unlikely that the construction project will be implemented entirely according to the planned work and expenditure schedule. In order to monitor the process of deviations of the deadline and the budget of the investment task, several rudimentary methods of planning—as well as the cyclical control of the progress of construction projects—are used. An effective tool for measuring the utilization of the financial outlays of a construction project is the presentation of the planned financial flows on a timeline using a cumulative cost chart, the representation of which is the S-curve. The purpose of this paper is to analyze the course of an sample construction project comparing the planned costs of the scheduled works with the actual costs of the performed works, as well as identifying the reasons leading to the failure to meet the planned deadlines and budget of the project implementation. As part of the research conducted at a construction site of a hotel facility, the authors of this paper analyzed each of the 20-month effects of financial expenditures on construction works that were developed and processed by the Bank Investment Supervision (BIS) over a period of three years (between 2017 and 2019). Based on these results, charts and tables of the scheduled and actual cumulative costs of the completed construction project were prepared, the careful analysis of which enables interesting conclusions to be drawn.

Landslide on a Deeply Landfilled Slope: A Case Study of Tembalang, Indonesia

2014 ◽  
Vol 70 (1) ◽  
Author(s):  
Rifqi Brilyant Arief ◽  
Gatot Rusbintardjo ◽  
Nur Izzi Md. Yusoff
Keyword(s):  
Steep Slope ◽  
Soil Reinforcement ◽  
The Other ◽  
High Shear ◽  
High Shear Stress ◽  
Soil Shear Strength ◽  
Under Construction ◽  
Storey Building ◽  
Construction Works

This paper reports on the failure of a deeply landfilled area where a three-storey building was under construction on it. The soil used for landfill adheres to the safety needs as the material used was the commonly used mountainous soil. The soil has sufficient high shear stress even for a steep slope. When heavy and persistent rain came, some area suffered catastrophic landslide causing part of the ground floor in the three-storey building damaged. Since the rainy season is still undergoing, fast reinforcement acts were needed so that the construction works may proceed without any subsequent landslide events. A grouting technique using cement mixed into the soil was proposed at site and proved successful where no event of landslide occurred. This paper also presented the reasons for choosing grouting cement compared to the other common soil reinforcement methods. An increase in soil shear strength due to cement grouting will also be discussed. This paper also presents the cases of landslide caused by torrential rain and provides recommendation of reinforcement methods for such cases.  

scholarly journals Construction work cost and duration analysis with the use of agent-based modelling and simulation

2021 ◽  
Vol 11 (1) ◽  
pp. 830-844
Author(s):  
Grzegorz Śladowski ◽  
Bartłomiej Sroka
Keyword(s):  
Construction Work ◽  
Dynamic Interactions ◽  
Bottom Up ◽  
Agent Based ◽  
Project Assessment ◽  
Heritage Site ◽  
And Performance ◽  
Basic Level ◽  
Construction Works

Abstract Assuming a systemic approach, a construction project can be treated as a complex system composed of many different interlinked elements such as construction works, human agents, equipment, materials and the knowledge needed to perform the said work. The system’s structure can be divided into many mutually connected precision levels. This multilevel decomposition of the system facilitates a bottom-up approach in assessing the performance of a planned project, while starting the analysis at its lowest aggregation levels. The basic level distinguishes three typical units and their attributes: persons, knowledge and construction resources. Unit attributes and their dynamic interactions under changing environmental conditions affect the properties and performance of a given construction work and, as a consequence, the properties and performance of the project. The objective of this article is to analyse the attributes and micro-behaviours of units through bottom-up project assessment, allowing the estimation of its parameters such as completion time and cost. We utilised multiagent modelling that allows for performing micro-simulations in complex systems with adaptive components. The analysis was backed by a case study of road renovation work performed under specific conditions on the grounds of a listed heritage site.

scholarly journals The Significance of Scope 3 GHG Emissions in Construction Projects in Korea: Using EIA and LCA

Climate ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 33
Author(s):  
Kyeong-Tae Kim ◽  
Ik Kim
Keyword(s):  
Life Cycle ◽  
Construction Projects ◽  
Ghg Emissions ◽  
Development Project ◽  
Construction Work ◽  
Ghg Emission ◽  
Wrong Decision ◽  
Evaluation Procedures ◽  
Exact Amount

In Korea, a greenhouse gas (GHG) environmental impact assessment (EIA) has been conducting since 2012, which sets the evaluation procedures and methods for GHG items during the EIA. However, the current EIA on GHG emissions can support wrong decision-making because the evaluation does not consider Scope 3 GHG emissions. Accordingly, this study proposed the life cycle EIA (LCEIA) method to identify changes in GHG emissions that need to be managed by considering Scope 3 GHG emissions in construction projects. The LCEIA method incorporates life cycle CO2 (LCCO2) including Scope 1, Scope, and Scope 3 GHG emissions using the concept of life cycle assessment (LCA) into the scoping step of the EIA process. The case study was conducted using existing EIA on GHG emission and LCEIA methodology for a development project in Gwangyang City. Scenario 1 is defined as an approach that calculates GHG emissions using the existing EIA method, and scenario 2 is also defined as a process using the LCEIA method. Results reveal that Scenario 2, including Scope 3 GHG emissions, had 46.4−51.2% more GHG emissions than Scenario 1. Sensitivity analysis for electricity and liquefied natural gas (LNG) density was also performed. Although the change in the carbon emission factor of electricity had a slightly sensitive effect on the research results, the LNG density was found to be less sensitive. This study believes the importance of switching to an EIA reflecting life cycle carbon dioxide (LCCO2) to calculate the exact amount of GHG emissions for construction work.

Assessment of Impact of COVID-19 Lockdown on Nepal’s Construction Sector based on Selected Construction Projects

2021 ◽  
Vol 08 (01) ◽  
pp. 1-9
Author(s):  
Priyanka Thapa ◽  
Keyword(s):  
Supply Chain ◽  
Construction Projects ◽  
World Health ◽  
Construction Sector ◽  
Construction Work ◽  
Global Pandemic ◽  
Health Organization ◽  
Almost All ◽  
The Impact

Coronavirus disease 2019 (COVID-19), a global pandemic as declared by World Health Organization (WHO) is causing severe impacts in almost all aspects of life in Nepal. In response to this pandemic, Nepal Government announced a country-wide lockdown from 24th March 2020 and ended on 21st July 2020. Coronavirus pandemic is an unprecedented event affecting almost every aspect of the construction sector in Nepal. Hence, this study was carried out to assess the impact of COVID-19 lockdown on Nepal’s construction sector based on selected construction projects. For this purpose, a case study of five ongoing construction projects was taken into account and questionnaires were distributed to responsible officials (client, consultant and contractor) of those projects. This study intended to find out the impact of COVID-19 lockdown on supply-demand trend analysis, cost and time of construction projects. Besides, this study also intends to find the contractual issues and claims associated with COVID-19 lockdown. The study reveals that COVID-19 caused serious disruption to the supply chain. Subsequently, project cost and time increases due to uncertainty regarding the availability of subcontractors/ suppliers/labour. The impact of COVID-19 lockdown however varies with the nature, scale and size of the project. Besides, the study also implies that contractual disputes are likely to increase due to lockdown. Each contract and its conditions have to be carefully analyzed to determine a party’s specific entitlement. There is uncertainty as to when the situation becomes normal and construction work can be carried out with optimum efficiency.

Sign in / Sign up

Export Citation Format

Share Document