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Vol.2 , No. 3, Publication Date: Aug. 21, 2017, Page: 21-29
, it was noticed that earth movements surrounding the southern abutment block (Constantine side) started to appear, with falls invading the national road n° 27 (RN27) road and of the cracks appearing on the level of the buildings being neighbourly the site. The southern abutment foundation, concerned with these disorders accompanied by cracks, is currently constant by ties anchored in the rock on which the remainder of the abutment foundation rests. The object of this study, in more of the determination of the critical slip-circle having damaged the embankment of access to the abutment side, and to propose solutions of reinforcement, is to show the relevance of the combined use of several methods of investigation, surface and subsurface having contributed to determine in a precise way the facts of the case. Among the methods of approach which proved very instructive, we will quote: -The geological investigation and in particular the tectonic aspect of the area in the explanation of the disorders observed, - The motion study on the surface by means of topography, - The study in subsurface by means of the inclinometric and piezometric data, - The study by means of the continuous core sampling. The research of the coefficient safety minimum, corresponding to the rough surface, the software Nixes and Trolles which made it possible to confirm the accuracy of the forecasts of the preceding traditional methods.&picture=http://www.aascit.org/aascit/decorators/img/journal/816.jpg)
| [1] | Riad Benzaid, Génie Géologique Laboratory, University of Mohammed Seddik Benyahia, Jijel, Algeria. |
| [2] | Mustapha Tekkouk, Génie Géologique Laboratory, University of Mohammed Seddik Benyahia, Jijel, Algeria. |
During the realization of the viaduct of Wadi Dib Oued (Wilaya of Mila, Northeast Algeria), it was noticed that earth movements surrounding the southern abutment block (Constantine side) started to appear, with falls invading the national road n° 27 (RN27) road and of the cracks appearing on the level of the buildings being neighbourly the site. The southern abutment foundation, concerned with these disorders accompanied by cracks, is currently constant by ties anchored in the rock on which the remainder of the abutment foundation rests. The object of this study, in more of the determination of the critical slip-circle having damaged the embankment of access to the abutment side, and to propose solutions of reinforcement, is to show the relevance of the combined use of several methods of investigation, surface and subsurface having contributed to determine in a precise way the facts of the case. Among the methods of approach which proved very instructive, we will quote: -The geological investigation and in particular the tectonic aspect of the area in the explanation of the disorders observed, - The motion study on the surface by means of topography, - The study in subsurface by means of the inclinometric and piezometric data, - The study by means of the continuous core sampling. The research of the coefficient safety minimum, corresponding to the rough surface, the software Nixes and Trolles which made it possible to confirm the accuracy of the forecasts of the preceding traditional methods.
Keywords
Landslide, Slope, Stability, Reinforcement, Viaduc of Wadi Dib, Algeria
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