Risques de glissement et aménagements : l'exemple du glissement d'un remblai autoroutier à l'ouest de Bouira (Grande Kabylie, Algérie)

Physio-Géo

关键词: Algeria;    cracks;    deformation;    fill;    geotechnical analysis;    infrastructure;   

DOI  :  10.4000/physio-geo.1147

来源: DOAJ

【 摘 要 】

In the north of Algeria, mass-movements have a dominating part in the evolution of the slopes. The geological and geotechnical investigation of the ground is generally justified by the search of solutions to bring to a declared movement. Thus, the objective of this paper is to study the stability of the embankment of the Bouira East-West highway by-pass, which has been subjected to several geotechnical expertises. This geotechnical recognition related to the realization of five cored surveys, seven surveys with the static penetrometer and of the laboratory tests. The calculations of stability made it possible to lead to a rupture of the circular type and with a rupture of the plane type whose recorded safety factors are weak more. Calculations in plane and circular ruptures highlight a potential deep instability of subjacent clays under the effect of the circulation of water. To confirm the nature and the delimitation of the zone of slip in-length and in-depth, measurements by inclinometers and piezometers were carried out regularly. The evolution of the deformations of the material support is about 2 to 4 cm each month. Many technical solutions have been worked out for the stability of site by reinforcing installations, as the change of geometry to reduce immediately the height of the embankment to the east of the slip, design of a system of draining and finally stabilization by a curtain of piles.

【 授权许可】

Unknown