EVALUATION OF GEOSYNTHETIC-REINFORCED SOIL WALL USING LIMIT EQUILIBRIUM ANALYSES
Published In: 5TH INTERNATIONAL CONFERENCE ON ADVANCES IN CIVIL AND STRUCTURAL ENGINEERING
Author(s): ANWAR A. E. AHMED , SULIMAN B. A. MOHAMED
Abstract: Current FHWA design guidelines recommend the lateral earth pressure method for designing reinforced walls (face inclinations larger than 70o) and the limit equilibrium (LE) method for designing reinforced slopes (face inclinations less than 70o); however, this limitation is somewhat arbitrary and there is no clear reason why LE method could not be theoretically applicable to the design of reinforced walls. Therefore, this study evaluated the use of LE for predicting the failure of centrifuge geosynthetic-reinforced soil (GRS) wall models. The variables considered in the centrifuge testing program were the reinforcement types, lengths, spacing, and height of the wall models. The comparison results indicated that LE with a noncircular failure surface and centrifuge models had good agreement in locating failure surfaces. Insoil/ confined ultimate tensile strengths Tult of reinforcements were back-calculated from LE analyses at wall failure (FS=1.0) and consistent confined Tult values were
- Publication Date: 13-Mar-2016
- DOI: 10.15224/978-1-63248-088-0-25
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OPTIMUM MANAGEMENT OF GROUNDWATER, USING GENETIC ALGORITHM TECHNIQUE
Published In: 5TH INTERNATIONAL CONFERENCE ON ADVANCES IN CIVIL AND STRUCTURAL ENGINEERING
Author(s): ALI H. AL-ABOODI , SARMAD A. ABBAS , WISAM S. AL-REKABI
Abstract: The aim of this research is to develop decision support tools for identifying optimal location for groundwater development to meet the future demands in the Teeb Area. Teeb Area is located in north and north east of Missan Province, south of Iraq. This area is about 1860 km2. A twodimensional mathematical model is developed to simulate the flow regime of the upper part of Quaternary Deposits. The suggested conceptual model, which is advocated to simulate the flow regime of aquifer is fixed for one layer, i.e. the activity of the deeper aquifer is negligible. The model is calibrated using trial and error procedure in two stages, steady state followed by unsteady state. This model is integrated with an optimization model which is based on the genetic algorithm (GA). Three management cases were undertaken by running the model with adopted calibrated parameters. In the first case found the optimum value of the objective function is (0.32947E+08 m3/year), in other words, the pumping rates c
- Publication Date: 13-Mar-2016
- DOI: 10.15224/978-1-63248-088-0-26
- Views: 0
- Downloads: 0