Pub Date : 2022-01-12DOI: 10.36348/sjce.2022.v06i01.002
Ihemegbulem Ezekiel O, Njoku Kelechi O, Nwokorobia Godfrey C, Ikpa Patience N
This study entails the research data of the empirical study carried out on the compressive strength determination of Granite dust-Sandcrete with granite dust as partial replacement of three (3) grades of river sand with fineness modulus (fm) of 2.29, 2.44 and 2.89. The percentage replacements range from 0%, 10%, 20%, 30%, 40%, 50% to 100%. A gross number of 102 cubes of 150 × 150 × 150mm square metallic mould were blend, mixed and cast with a mix ratio of 1:5. Three (3) cubes were blend, mixed and cast for each percentage partial replacement and a total 34 cubes for each grade of river sand, were crushed to derive the compression strength of 28th day curing respectively. For river sand with fineness modulus of 2.29, the highest strength was recorded on 80% replacement, while the least strength was recorded on 0% replacement. For the same river sand, compressive strength increased from 0% to 80% and assumed a descending trend from 80% to 100%. For 2.44 fineness modulus, the highest strength was recorded on 80% replacement, while the least strength was recorded on 0% replacement. Also, for the same river sand, compressive strength increased from 0% to 80% and assumed a descending trend from 80% to 100%. For river sand of 2.89 fineness modulus, the highest strength was recorded on 70% replacement, while the least strength was recorded on 0% replacement. Also, compressive strength increased from 0% to 70% and assumed a descending trend from 70% to 100%. Generally, the compressive strength assumed an upward trend as the percentage replacement increases.
{"title":"Compressive Strength Determination of Granite Dust-Sandcrete","authors":"Ihemegbulem Ezekiel O, Njoku Kelechi O, Nwokorobia Godfrey C, Ikpa Patience N","doi":"10.36348/sjce.2022.v06i01.002","DOIUrl":"https://doi.org/10.36348/sjce.2022.v06i01.002","url":null,"abstract":"This study entails the research data of the empirical study carried out on the compressive strength determination of Granite dust-Sandcrete with granite dust as partial replacement of three (3) grades of river sand with fineness modulus (fm) of 2.29, 2.44 and 2.89. The percentage replacements range from 0%, 10%, 20%, 30%, 40%, 50% to 100%. A gross number of 102 cubes of 150 × 150 × 150mm square metallic mould were blend, mixed and cast with a mix ratio of 1:5. Three (3) cubes were blend, mixed and cast for each percentage partial replacement and a total 34 cubes for each grade of river sand, were crushed to derive the compression strength of 28th day curing respectively. For river sand with fineness modulus of 2.29, the highest strength was recorded on 80% replacement, while the least strength was recorded on 0% replacement. For the same river sand, compressive strength increased from 0% to 80% and assumed a descending trend from 80% to 100%. For 2.44 fineness modulus, the highest strength was recorded on 80% replacement, while the least strength was recorded on 0% replacement. Also, for the same river sand, compressive strength increased from 0% to 80% and assumed a descending trend from 80% to 100%. For river sand of 2.89 fineness modulus, the highest strength was recorded on 70% replacement, while the least strength was recorded on 0% replacement. Also, compressive strength increased from 0% to 70% and assumed a descending trend from 70% to 100%. Generally, the compressive strength assumed an upward trend as the percentage replacement increases.","PeriodicalId":437137,"journal":{"name":"Saudi Journal of Civil Engineering","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125429544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-10DOI: 10.36348/sjce.2022.v06i01.001
Rassidatou Abbo, Okpwe Mbarga Richard, L. Minsili, Mbondo Jean Marc
All around the world, the Building Information Modeling (BIM) is transforming the architecture of engineering design and of construction industry. While it is in an early implementation stage in African Sub-saharan Countries, many construction regulators and project owners are beginning to enforce the BIM application from the project design stage to its commissioning. The aim of this research work is to provide an approach for designing industrial warehouses using BIM as it was done in the industrial zone of the Kribi Deep Sea port in Cameroon. The proposed methodology is presented in six steps: definition of BIM general requirements, design of the 3D BIM architectural model, sizing of wall and roof for specific requirements, design of the 3D BIM structural model, coordination of 3D BIM models and interference detection and creation of 4D BIM model. Results obtained from the application of BIM on the design of a warehouse, dedicated to preserve the natural and biological essence of cocoa and coffee products in a hostile marine environment, show that this methodology is easily appropriated and implemented by local design and construction engineers through available engineering software in the local market.
{"title":"A BIM Approach for the Design of Industrial Warehouses","authors":"Rassidatou Abbo, Okpwe Mbarga Richard, L. Minsili, Mbondo Jean Marc","doi":"10.36348/sjce.2022.v06i01.001","DOIUrl":"https://doi.org/10.36348/sjce.2022.v06i01.001","url":null,"abstract":"All around the world, the Building Information Modeling (BIM) is transforming the architecture of engineering design and of construction industry. While it is in an early implementation stage in African Sub-saharan Countries, many construction regulators and project owners are beginning to enforce the BIM application from the project design stage to its commissioning. The aim of this research work is to provide an approach for designing industrial warehouses using BIM as it was done in the industrial zone of the Kribi Deep Sea port in Cameroon. The proposed methodology is presented in six steps: definition of BIM general requirements, design of the 3D BIM architectural model, sizing of wall and roof for specific requirements, design of the 3D BIM structural model, coordination of 3D BIM models and interference detection and creation of 4D BIM model. Results obtained from the application of BIM on the design of a warehouse, dedicated to preserve the natural and biological essence of cocoa and coffee products in a hostile marine environment, show that this methodology is easily appropriated and implemented by local design and construction engineers through available engineering software in the local market.","PeriodicalId":437137,"journal":{"name":"Saudi Journal of Civil Engineering","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124868757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-29DOI: 10.36348/sjce.2021.v05i03.001
. W. Firomsa, Damtew Tsige
The critical failure surface for a given slope can be determined by comparing factor of safety of several trial slip surfaces. To find the minimum factor of safety, it is important to get critical failure surface for the given slope. Different searching and optimization methods that had the difficulty in using them for hand calculations have been used in the past. In this study, effect of soil strength parameters; cohesion (c), internal friction angle (φ), and unit weight () on the failure surface and factor of safety of the slope were studied. GEO5 software program were used to calculate the length of failure and determine the critical failure surface. An equation was introduced in to locate the critical failure surface by using soils strength and slope geometry parameters. The results of the study showed that the factor of safety of the slope changes with varying cohesion c, internal friction angle φ, and the unit weight of the soil. Moreover, the slip surface is affected by the dimensionless function (), which is related to the cohesion, internal friction angle and unit weight. Model was introduced in to locate the critical failure surface by using soils strength and slope geometry.
{"title":"Developing Model for Critical Slip Surface in Slope Stability Analysis based on Geometry and Soil parameters","authors":" . W. Firomsa, Damtew Tsige","doi":"10.36348/sjce.2021.v05i03.001","DOIUrl":"https://doi.org/10.36348/sjce.2021.v05i03.001","url":null,"abstract":"The critical failure surface for a given slope can be determined by comparing factor of safety of several trial slip surfaces. To find the minimum factor of safety, it is important to get critical failure surface for the given slope. Different searching and optimization methods that had the difficulty in using them for hand calculations have been used in the past. In this study, effect of soil strength parameters; cohesion (c), internal friction angle (φ), and unit weight () on the failure surface and factor of safety of the slope were studied. GEO5 software program were used to calculate the length of failure and determine the critical failure surface. An equation was introduced in to locate the critical failure surface by using soils strength and slope geometry parameters. The results of the study showed that the factor of safety of the slope changes with varying cohesion c, internal friction angle φ, and the unit weight of the soil. Moreover, the slip surface is affected by the dimensionless function (), which is related to the cohesion, internal friction angle and unit weight. Model was introduced in to locate the critical failure surface by using soils strength and slope geometry.","PeriodicalId":437137,"journal":{"name":"Saudi Journal of Civil Engineering","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122596176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-16DOI: 10.36348/sjce.2021.v05i02.003
Abdulmoneim Am, A AlSamadony, Nosair Ia
Megaprojects are a large-scale project with an expensive cost and long time schedule, this unique kind of projects are usually given their infamous reputation as it is often result in undesired outcomes same as enormous cost overruns and time extensions. In a lot of cases of undesired outcomes, we can predict that it is due to not managing megaprojects characteristics as skillfully as required and wrong combination of that characteristics which lead to a disaster. Improper managing the different managerial aspects of mega projects is reflecting a failure in the achievement of the project requirements especially in case of risk managements where we can say that, Mega projects is resulting a Mega risk. Risk management is currently considered to be a mandatory part of project management in general and an integral part of successful project management while the main aspect which is projects management is different from megaprojects than in other types of projects (smalland medium-scale projects) as in case of megaproject the management is more complex and complicated due to the size and complexity of that kind of projects. In this research the author studied the Risk Management in the Mega construction projects in the kingdom of Saudi Arabia (KSA) and the main objective of this research was to apply the best ways of managing the risk in case of mega construction projects starting from identifying the most significant risks which impact this kind of project in KSA and then analyze the identified risk qualitatively to determine its impact in the project objective and to find out the most significant 15 risks after the ranking of the identified risk depending on the risk importance index of every risk the research resulted in identifying 57 risks and categorize those risks in 2 main groups and 8 subgroups one of them is related the mega construction projects characteristics and then the most important risks has been determined.
{"title":"Identification and Ranking the Most Significant Risks of the Mega Construction Projects in Saudi Arabia","authors":"Abdulmoneim Am, A AlSamadony, Nosair Ia","doi":"10.36348/sjce.2021.v05i02.003","DOIUrl":"https://doi.org/10.36348/sjce.2021.v05i02.003","url":null,"abstract":"Megaprojects are a large-scale project with an expensive cost and long time schedule, this unique kind of projects are usually given their infamous reputation as it is often result in undesired outcomes same as enormous cost overruns and time extensions. In a lot of cases of undesired outcomes, we can predict that it is due to not managing megaprojects characteristics as skillfully as required and wrong combination of that characteristics which lead to a disaster. Improper managing the different managerial aspects of mega projects is reflecting a failure in the achievement of the project requirements especially in case of risk managements where we can say that, Mega projects is resulting a Mega risk. Risk management is currently considered to be a mandatory part of project management in general and an integral part of successful project management while the main aspect which is projects management is different from megaprojects than in other types of projects (smalland medium-scale projects) as in case of megaproject the management is more complex and complicated due to the size and complexity of that kind of projects. In this research the author studied the Risk Management in the Mega construction projects in the kingdom of Saudi Arabia (KSA) and the main objective of this research was to apply the best ways of managing the risk in case of mega construction projects starting from identifying the most significant risks which impact this kind of project in KSA and then analyze the identified risk qualitatively to determine its impact in the project objective and to find out the most significant 15 risks after the ranking of the identified risk depending on the risk importance index of every risk the research resulted in identifying 57 risks and categorize those risks in 2 main groups and 8 subgroups one of them is related the mega construction projects characteristics and then the most important risks has been determined.","PeriodicalId":437137,"journal":{"name":"Saudi Journal of Civil Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129344209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-05DOI: 10.36348/sjce.2020.v04i05.001
Shengjie Guo, L. Ru
Under the background of rapid development of social economy and continuous progress of scientific information technology, new energy-saving technologies and materials have been widely used in building HVAC design, and promoted the development of China's architectural HVAC design field. The application of new energy saving technology and materials in building HVAC design can effectively reduce the energy consumption of building HVAC design and achieve the effect of energy conservation and environmental protection.
{"title":"Application of New Energy Saving Technology and Materials in HVAC Design of Civil Buildings","authors":"Shengjie Guo, L. Ru","doi":"10.36348/sjce.2020.v04i05.001","DOIUrl":"https://doi.org/10.36348/sjce.2020.v04i05.001","url":null,"abstract":"Under the background of rapid development of social economy and continuous progress of scientific information technology, new energy-saving technologies and materials have been widely used in building HVAC design, and promoted the development of China's architectural HVAC design field. The application of new energy saving technology and materials in building HVAC design can effectively reduce the energy consumption of building HVAC design and achieve the effect of energy conservation and environmental protection.","PeriodicalId":437137,"journal":{"name":"Saudi Journal of Civil Engineering","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124861442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-18DOI: 10.36348/sjce.2020.v04i04.001
I. C. Onyechere, O. Ibearugbulem, U. C. Anya, Kelechi Okechukwu Njoku, A. U. Igbojiaku, L. Gwarah
In this work, polynomial deflection expression was used in the free-vibration investigation of thick rectangular plates with two different boundary conditions; one with its four edges clamped denoted with the acronym (CCCC) and another with two adjacent edges fixed and having simple supports at the other two adjacent edges denoted with the acronym (CCSS). The edge conditions of the various plates were fulfilled and used in generating the stiffness coefficients which were substituted into the analytical equation to obtain the non-dimensional frequency functions for the plates at different span-depth ratio (a/t) and aspect ratio (b/a). It was observed that at the same value of (b/a), there is an increase in the value of the non-dimensional frequency parameter as (a/t) increases. Also, at the same value of (a/t), there is a decrease in the value of the non-dimensional frequency parameter as (b/a) increases. The results obtained for the all edges clamped plate were compared with similar works by other researchers in the literature and were found to follow similar pattern and trend and were quite close.
{"title":"The Use of Polynomial Deflection Function in The Analysis of Thick Plates using Higher Order Shear Deformation Theory","authors":"I. C. Onyechere, O. Ibearugbulem, U. C. Anya, Kelechi Okechukwu Njoku, A. U. Igbojiaku, L. Gwarah","doi":"10.36348/sjce.2020.v04i04.001","DOIUrl":"https://doi.org/10.36348/sjce.2020.v04i04.001","url":null,"abstract":"In this work, polynomial deflection expression was used in the free-vibration investigation of thick rectangular plates with two different boundary conditions; one with its four edges clamped denoted with the acronym (CCCC) and another with two adjacent edges fixed and having simple supports at the other two adjacent edges denoted with the acronym (CCSS). The edge conditions of the various plates were fulfilled and used in generating the stiffness coefficients which were substituted into the analytical equation to obtain the non-dimensional frequency functions for the plates at different span-depth ratio (a/t) and aspect ratio (b/a). It was observed that at the same value of (b/a), there is an increase in the value of the non-dimensional frequency parameter as (a/t) increases. Also, at the same value of (a/t), there is a decrease in the value of the non-dimensional frequency parameter as (b/a) increases. The results obtained for the all edges clamped plate were compared with similar works by other researchers in the literature and were found to follow similar pattern and trend and were quite close.","PeriodicalId":437137,"journal":{"name":"Saudi Journal of Civil Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130092735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-02-29DOI: 10.36348/sjce.2020.v04i02.001
Gabriel Okonkwo Nnaji, C. Kennedy, Nwaobakata Chukwuemeka
The research work examined the modification of expansive soils with bagasse fibre to improve its engineering properties for road pavement structures. Preliminary investigations classified the clay soils as A – 7 – 6 on the AASHTO Classification System and soils are dark grey at all conditions and percentage (%) passing BS sieves #200 are 73.85%, 67.38%, 6.35%, 82.35%, and 71.55%. Comparative results confirmed a decrease in plastic index properties of clay soils. Compaction test results showed a decreased in MDD values while OMC recorded increased values due to bagasse fibre inclusion. Results obtained showed an increase in UCS with an increase in fibre percentages to soil corresponding ratio. Relative results showed an increased in CBR values with an increase in bagasse fibre percentages to a peak ratio of 0.75% to soil ratio. The entire results showed the potential of using costaceae lacerus bagasse fibre (CLBF) as admixtures in the treatment of clay soils. The swelling potential of treated soil decreased with the inclusion of bagasse fibre up to 0.75%.
{"title":"Black Cotton Soil Properties Modification using Costaceae Lacerus Bagasse Fibre as Road Pavement Stabilizer","authors":"Gabriel Okonkwo Nnaji, C. Kennedy, Nwaobakata Chukwuemeka","doi":"10.36348/sjce.2020.v04i02.001","DOIUrl":"https://doi.org/10.36348/sjce.2020.v04i02.001","url":null,"abstract":"The research work examined the modification of expansive soils with bagasse fibre to improve its engineering properties for road pavement structures. Preliminary investigations classified the clay soils as A – 7 – 6 on the AASHTO Classification System and soils are dark grey at all conditions and percentage (%) passing BS sieves #200 are 73.85%, 67.38%, 6.35%, 82.35%, and 71.55%. Comparative results confirmed a decrease in plastic index properties of clay soils. Compaction test results showed a decreased in MDD values while OMC recorded increased values due to bagasse fibre inclusion. Results obtained showed an increase in UCS with an increase in fibre percentages to soil corresponding ratio. Relative results showed an increased in CBR values with an increase in bagasse fibre percentages to a peak ratio of 0.75% to soil ratio. The entire results showed the potential of using costaceae lacerus bagasse fibre (CLBF) as admixtures in the treatment of clay soils. The swelling potential of treated soil decreased with the inclusion of bagasse fibre up to 0.75%.","PeriodicalId":437137,"journal":{"name":"Saudi Journal of Civil Engineering","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126181302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-09-30DOI: 10.36348/sjce.2019.v03i05.001
S. Ghimire, A. Mishra
Delays are the major sources of disputes and adverse relationships between the stakeholders in construction industry. The existing delay analysis techniques (DATs), though helpful for decision-making, have not succeeded in properly addressing the high incidence of disputes associated with delay claims resolutions. This research has made a comparative study of limitation and capabilities of different ̳Prospective‘ DATs i.e., Impacted as Planned method and Time Impact Analysis Method under the same baseline program and under similar circumstances of delay occurrence through the case study of under-Construction Hydroelectric Project and review of the relevant issues not addressed by the techniques. Oracle‘s Primavera (P6) software has been used for delay analysis. The Contractor has not followed any of the DATs to raise the claim for extension of time. Though the contractor has submitted its revised construction schedule as per the FIDIC conditions of contract and ask for time extension of 721 days, the revised construction schedule has no any linkage with the original approved baseline Schedule. The Impacted as planned technique confined the delay to 621 days. The actual site condition and the progress were not considered in this method. The concurrent delays and pacing delays were also not addressed. According to the Time Impact analysis technique, the contractor‘s caused delay was 101 days and the delay from Employer‘s side was 529 days. The actual site condition and the progress were considered in this method. However, none of the Delay analysis techniques is found to address all the delay occurring events. The concurrent delays and pacing delayswere also not addressed. Time impact analysis technique is more accurate method as the site progress is incorporated in this method and is recommended to be followed.
延误是建筑行业利益相关者之间纠纷和不利关系的主要来源。现有的延迟分析技术(dat)虽然有助于决策，但未能成功地妥善解决与延迟索赔解决相关的高发生率纠纷。本研究通过对在建水电项目的案例分析，对相同基线方案和类似延迟发生情况下不同的“预期影响分析法”即“计划影响分析法”和“时间影响分析法”的局限性和能力进行了比较研究，并对技术未解决的相关问题进行了评述。Oracle的Primavera (P6)软件被用于延迟分析。承包商没有按照任何日期提出延期索赔。尽管承包商已按照FIDIC合同条件提交了修改后的施工进度计划，并要求延长721天的工期，但修改后的施工进度计划与原批准的基线进度计划没有任何联系。impact as planned技术将延迟时间限制在621天。该方法未考虑现场实际情况和施工进度。同时出现的延迟和节奏延迟也没有得到解决。根据时间影响分析技术，承包商造成的延误为101天，雇主方面的延误为529天。该方法考虑了现场的实际情况和施工进度。然而，没有发现任何延迟分析技术可以解决所有延迟发生的事件。同时出现的延迟和速度延迟也没有得到解决。时间影响分析技术由于纳入了现场进度，是一种较为准确的方法，建议采用。
{"title":"Comparative Study of Prospective Delay Analysis Techniques (DATs)","authors":"S. Ghimire, A. Mishra","doi":"10.36348/sjce.2019.v03i05.001","DOIUrl":"https://doi.org/10.36348/sjce.2019.v03i05.001","url":null,"abstract":"Delays are the major sources of disputes and adverse relationships between the stakeholders in construction industry. The existing delay analysis techniques (DATs), though helpful for decision-making, have not succeeded in properly addressing the high incidence of disputes associated with delay claims resolutions. This research has made a comparative study of limitation and capabilities of different ̳Prospective‘ DATs i.e., Impacted as Planned method and Time Impact Analysis Method under the same baseline program and under similar circumstances of delay occurrence through the case study of under-Construction Hydroelectric Project and review of the relevant issues not addressed by the techniques. Oracle‘s Primavera (P6) software has been used for delay analysis. The Contractor has not followed any of the DATs to raise the claim for extension of time. Though the contractor has submitted its revised construction schedule as per the FIDIC conditions of contract and ask for time extension of 721 days, the revised construction schedule has no any linkage with the original approved baseline Schedule. The Impacted as planned technique confined the delay to 621 days. The actual site condition and the progress were not considered in this method. The concurrent delays and pacing delays were also not addressed. According to the Time Impact analysis technique, the contractor‘s caused delay was 101 days and the delay from Employer‘s side was 529 days. The actual site condition and the progress were considered in this method. However, none of the Delay analysis techniques is found to address all the delay occurring events. The concurrent delays and pacing delayswere also not addressed. Time impact analysis technique is more accurate method as the site progress is incorporated in this method and is recommended to be followed.","PeriodicalId":437137,"journal":{"name":"Saudi Journal of Civil Engineering","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115645991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-09-30DOI: 10.36348/sjce.2019.v03i05.006
Asmaa Al-Mohannadi, A. Al-Malki, R. Furlan
This research study aims at tracing the human-behavior relationship between current migrant-residents and the built fabric of Najada zone in Doha. It provides a useful insight into the urban reality of migrant communities in a selected neighborhood and suggests that foreseen plans for urban adaptation and revitalization should be considered in alignment with the ever-changing demographics of a city facing fast urban growth. Through various methodological tools embedded into human-behavior studies that support the analysis of spatial practice of communities such as (i) systematic observation, (ii) contemplating settings and (iii) walking tour assessment, the interaction of Najada’s users and the surrounding built environment is traced. The purpose of the research study is to provide the basic foundation of analytical data for urban design schemes that encourages preservation and conservation of neglected old neighborhoods, at national and regional scale.
{"title":"The Spatial Practice of Migrant Communities in Doha, Qatar: The Case of Najada Zone","authors":"Asmaa Al-Mohannadi, A. Al-Malki, R. Furlan","doi":"10.36348/sjce.2019.v03i05.006","DOIUrl":"https://doi.org/10.36348/sjce.2019.v03i05.006","url":null,"abstract":"This research study aims at tracing the human-behavior relationship between current migrant-residents and the built fabric of Najada zone in Doha. It provides a useful insight into the urban reality of migrant communities in a selected neighborhood and suggests that foreseen plans for urban adaptation and revitalization should be considered in alignment with the ever-changing demographics of a city facing fast urban growth. Through various methodological tools embedded into human-behavior studies that support the analysis of spatial practice of communities such as (i) systematic observation, (ii) contemplating settings and (iii) walking tour assessment, the interaction of Najada’s users and the surrounding built environment is traced. The purpose of the research study is to provide the basic foundation of analytical data for urban design schemes that encourages preservation and conservation of neglected old neighborhoods, at national and regional scale.","PeriodicalId":437137,"journal":{"name":"Saudi Journal of Civil Engineering","volume":"11 17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114399820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-09-30DOI: 10.36348/sjce.2019.v03i05.003
Fatima Shubbar, R. Furlan
Cities all over the world are currently facing many challenges and obstacles related to economy, society, and environment. These were the results of rapid economic developments, urban and population growth, and the accompanying increased needs and changing lifestyles. Several decades ago, Manama, the capital of the Kingdom of Bahrain, experienced significant changes in its urban form due to economic, cultural, and environmental factors. These changes appeared specifically after the discovery of oil in 1932, and the transformation of the economy from fishing and pearl trading to one based on oil. Currently, the Kingdom of Bahrain is investing in its capacity and solutions to these challenges, including creating major attractive developments to meet human needs and nourish the economy. Traditional urban neighborhoods across Bahrain, such as Kanoo, a traditional neighborhood located in Old Manama, were severely affected by modern developments. This research study investigates the urban design study of the Kanoo neighborhood, its features, the urban and historical significance in Manama and its surroundings. The study further investigates the role of rehabilitation projects in regenerating the old core of Manama, while rebuilding the vanishing identity of the city. The findings highlight the critical factors effecting the Kanoo neighborhood and contribute to develop strategies for a sustainable urban regeneration approach, enabling to protect the urban fabric of the neighborhood and its remaining historical areas, to revive the old city and preserve the neighborhood‟s identity.
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