INVESTIGATION OF LEARNING CURVE EFFECT ON GAS PIPELINE CONSTRUCTION IN EGYPT
Published In: 2ND INTERNATIONAL CONFERENCE ON ADVANCES IN CIVIL, STRUCTURAL AND CONSTRUCTION ENGINEERING
Author(s): MOHAMMAD A. AMMAR , MOHAMMAD SAMY
Abstract: Learning development effect plays an important role in planning and scheduling of repetitive projects. Several mathematical models, or learning curves, have been proposed to investigate improvement in productivity as a function of the number of units produced. Deciding the best-fit learning curve model for the activity under consideration is a management challenge. In this paper, the best-fit learning curve model for describing past performance of gas pipeline construction in Egypt is presented. Data were collected from real-life projects that are constructed in different types of land and having different size, length, pipe diameter and under various weather conditions. Only welding activity is considered in the present work because it is a labourintensive activity. Cumulative average data is used to represent collected data, which gives a smooth curve as well as avoids scattered data. The commercial Statistical Package for Social Science (SPSS) is used to calculate Pearson's coeffici
- Publication Date: 19-Apr-2015
- DOI: 10.15224/978-1-63248-042-2-02
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DETERMINATION OF AN EMPIRICAL MODEL FOR CALCULATING THE STRAIN OF A DAM IN TERMS OF HYDROSTATIC THRUST
Published In: 2ND INTERNATIONAL CONFERENCE ON ADVANCES IN CIVIL, STRUCTURAL AND CONSTRUCTION ENGINEERING
Author(s): FELIPE PINA GARCIA , RAUL PEREDA GARCIA , JULIO MANUEL DE LUIS RUIZ , RUBEN PEREZ ALVAREZ
Abstract: The deformational control of structures has its greatest exponent in the control of large dams, which depending on structural typology, can be subjected to movement generally based on the pressure that it suffers. The designer usually calculates the theoretical displacements that the dam must suffer depending on the hydrostatic pressure, function of the thrust bearing, but it is also true that this calculation is theoretical and it is not usually adjusted to the real movements, due to the uncertainties that arise in the construction of any dam and make the original project have more or less significant changes in the final construction. In favour of the builder, it must be said that the actual displacements are usually lower than the theoretical ones. The present research focuses on the determination of an empirical model that allows calculating the deformation based on practical observations of a direct pendulum over 14 years, which determines the displacement and the pressure experie
- Publication Date: 19-Apr-2015
- DOI: 10.15224/978-1-63248-042-2-03
- Views: 0
- Downloads: 0