Repair Works for Uplift and Seepage Control in Existing Concrete Dams
Abstract
This report aims at contributing to the study of the problems involved in the control of the deterioration of the rock foundations of concrete dams. The analysis of case histories on deterioration of rock mass and repair works of Portuguese dams is the main objective. Three case histories in Portuguese arch dams are presented. For each case the following is referred to: main characteristics of the works and main features of their design; relevant aspects of site studies, namely geological and geotechnical studies, and studies on materials; models and the experimental and numerical methods used in their analysis, developed to support design and safety control during operation; main features of the observation system and the most important results observed, with particular reference to the hydromechanical behaviour; detection of abnormal behaviour; main aspects of the repair works; and finally behaviour after repair. The three arch dams have different characteristics, namely as regards the geotechnical properties of the foundation, the shape and the year of construction; however, in the three cases similar methods were used in the rapair works, particularly by using polymers. Excepting for one case still in progress, satisfactory results were obtained with the repair works carried out in the other two cases. (kt)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1989
- Accession Number
- ADA215609
Entities
People
- Abel T. Mascarenhas
- Henrique S. Silva
- Jose O. Pedro
- Luis F. Rodrigues
- Luis R. Sousa
Organizations
- Laboratório Nacional de Engenharia Civil