Preliminary Cost Estimate Model for Culverts

Fragkakis, Nikolaos; Marinelli, Marina; Lambropoulos, Sergios

doi:10.1016/j.proeng.2015.10.072

Cited by 15 publications

(12 citation statements)

References 12 publications

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“…It is worthy of note that this study is pioneering the ranking of estimation techniques used for road projects in the body of knowledge. The submissions of researchers such as Christensen et al (2005), Lester (2017) and Fragkakis et al . (2015) on the definition of these estimation techniques are reflected here in the rankings regarding their usage by professionals in the Ghanaian construction industry.…”

Section: Discussion Of Findingsmentioning

confidence: 99%

Accuracy of road construction preliminary estimate: examining the influencing factors

Akinradewo

Aigbavboa

Oke

2020

BEPAM

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PurposePreparation of preliminary estimate is difficult owing to the lack of full project details in the early phases of the construction project. This paper seeks to assess the estimation techniques used for road projects and the critical factors affecting their accuracy in the Ghanaian construction industry.Design/methodology/approachQuantitative research design was adopted and questionnaire was designed to retrieve data. The target population were engineers and quantity surveyors who were contacted using an e-questionnaire through their professional bodies owing to location constraints. Retrieved data were analysed using descriptive and exploratory factor analysis. In order to compare the opinions of the respondents, the Mann–Whitney U-test was employed.FindingsThe survey revealed that subjective, parametric, comparative and analytical estimations are in use in Ghana. The most critical factors influencing the accuracy of estimation techniques are improper project planning, insufficient preliminary site investigation and usage of shortcuts, among others.Research limitations/implicationsThis study was limited to Accra, Ghana, due to time and distance constraint.Practical implicationsFor accuracy of preliminary estimates to be improved, estimators being the custodian of the estimate are expected to be devoid of errors such as arithmetic calculation errors, inaccurate quantity measurement and error of omission. The usage of estimating software can eliminate these human errors.Originality/valueThe study will assist policymakers and stakeholders in aligning mitigative actions for factors influencing preliminary estimate of road projects with defined clusters rather than basic ranks. With attention focussed on the characteristics of each cluster, accuracy of preliminary estimate can be improved.

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Section: Discussion Of Findingsmentioning

confidence: 99%

Accuracy of road construction preliminary estimate: examining the influencing factors

Akinradewo

Aigbavboa

Oke

2020

BEPAM

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“…Without that, bridge estimation will become less accurate. Moreover, accurate initial cost estimation was difficult due to limited information on a new project (Fragkakis, et al, 2015). Variable that often used as determinant/independent variable for initial cost estimation are dimensions (such as span, width, and height), bridge type, and bridge materials (such as concrete, steel, timber, composite).…”

Section: Introductionmentioning

confidence: 99%

“…A study to determine the best estimating techniques for building construction cost was conducted by Kim, et al (2013). An estimation model for culverts material quantities has been carried out by Fragkakis, et al (2015) using linear regression. A parametric approach for a better pavement cost estimate by enhancing the earlier cost estimation approaches was conducted by Swei, et al (2017).…”

Section: Introductionmentioning

confidence: 99%

“…A study that used project location as a determinant factor for cost estimate was carried out by Kim (2011), however, through the calculation of attribute weight using Generic Algorithm, project location was not significant or had very little impact to the cost estimate in CBR method used thus it was removed. Some studies involved seismic zone as a cost estimate predictor, unfortunately, the data did not provide adequate data samples since most of the data had similar seismic zone thus it was excluded (Fragkakis, et al, 2011;Fragkakis, et al, 2015). All of those studies were done using data from the previous project.…”

Section: Introductionmentioning

confidence: 99%

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Estimation Modeling of Abutment Volume with Variations of Bridge Span, Abutment Height, and Seismic Zone

Mahendra

Triwiyono

2020

Journal of the Civil Engineering Forum

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The initial cost estimate for a bridge project using an estimation model can be done based on the dimensions, type, and material of the bridge. Research that has included bridge location as a determinant variable for initial bridge cost estimation has not been carried out much. The different locations of the bridge project will have different seismic accelerations and seismic load analysis. This study aims to create a model used to calculate the quantity needed for the construction of abutment in various locations with a PCI-Girder superstructure. The data used for the quantity estimation model was derived from the abutment design results. The data obtained from the calculation of concrete and reinforcing steel quantities from the abutment design with variations in bridge span i.e. 20 m; 25 m; 30 m; 35 m; and 40 m, abutment height i.e. 4 m; 6 m; and 8 m, and seismic zone 1, 2, 3, and 4. Volume estimation models are obtained by multiple linear regression analysis. The results show a very strong correlation between the span of the bridge and the height of abutment with the dependent variables. While the seismic zone has a strong correlation with the dependent variables. However, the seismic zone in this study did not meet the linear regression assumptions. This study developed 8 models to estimate abutment volumes. The R2 values of these models are 0.983 – 0.997. These showed that the models are properly made to be used to estimate abutment volumes with a PCI-Girder superstructure.

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“…In this study we look at the task of decreasing the height of embankment by refining small culvert structures. This article will examine, first, changing approaches to hydraulic engineering, and secondchanges in snow drifts related to the decrease of the embankment height [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Decreasing the Height of Motor Road Embankments by Changing the Principle of Water Flow and Snow Protection in These Conditions

Nemchinov¹,

Ivanova²

2019

SAE

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The article puts forward a new type of culverts in roads. Main motive behind the construction of the new type of culverts is presented and examined: considerable height of road-beds at their construction locations and, as a result, unreasonably high road embankments. Snow drifts at roads and possible protection means are also examined. A report on theoretical analysis of the reasons of snow drifts experimental study with road models is included. The model showed low and high drifts blowing at different speeds at roads with and without embankments and with and without a snow-retaining barrier. All experiments were first conducted without cars on the traffic-bearing surface of the road, then with cars. Recommendations regarding road protection against snow are given.

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Preliminary Cost Estimate Model for Culverts

Cited by 15 publications

References 12 publications

Accuracy of road construction preliminary estimate: examining the influencing factors

Accuracy of road construction preliminary estimate: examining the influencing factors

Estimation Modeling of Abutment Volume with Variations of Bridge Span, Abutment Height, and Seismic Zone

Decreasing the Height of Motor Road Embankments by Changing the Principle of Water Flow and Snow Protection in These Conditions

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