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Long-term geophysical observations on the inguri dam rock foundation

  • Savich A. I. 
  • Iliin M. M. 
  • Ezersky M. G. 
  • Kalinin N. I. 
International Symposium Soil and Rock Investigation by In Situ Testing Thème 2 Subsurface Geophysical Methods, Used Define to the Parameters or the Structures
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Summary

It has been found that during construction of the dam, prior to the filling of the reservoir, compaction and loading of the rocks under the weight of the structure took place. As this happened, the sizes of the actively deforming zone were found to be 60–80 m (normal to canyon slope). From the inception of reservoir filling the character of the deformation changed. In the process of wateringress into the rock mass decompaction developed in the foundation resulting from the back pressure of fissure water. The size of the active zone, where decompaction is observed at the site of the arch dam, reaches 200–250 m and it is 500 m in the head of the reservoir.

Keywords

Rock Mass Elastic Wave Reservoir Water Level Fracture Pressure Fissure Water 

Observation du comportement a long terme des fondations du barrage d'inguri par methodes sismiques

Résumé

On a constaté que pendant la construction du barrage jusqu'à sa mise en eau, ont lieu, sous le poids propre de l'ouvrage, la consolidation et le serrage des roches, les dimensions de la zone de déformation active étant de 60 à 80 m (suivant la normale à la pente de la vallée). Avec la mise en eau du barrage, la nature des déformations change. Au fur et à mesure de l'inondation du massif, la décompression provoquée par la sous-pression des eaux de diaclases se manifeste dans la fondation rocheuse. Les dimensions de la zone active atteignent 200 à 250 m dans la zone du barrage-voûte et 500 m dans la zone de tête de la retenue.

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References

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Copyright information

© International Association of Engineering Geology 1982

Authors and Affiliations

  • Savich A. I. 
    • 1
  • Iliin M. M. 
    • 1
  • Ezersky M. G. 
    • 1
  • Kalinin N. I. 
    • 1
  1. 1.Geophysical Investigations DepartmentHydroprojectMoscowUSSR

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