Analysis of Causes of Uplift Anomalies in the ?ierny Váh Subsoil

World Multidisciplinary Earth Sciences Symposium 2017

Bednárová, Emilia^1 ; Grambliková, Danka^1 ; Škvarka, Juraj^1 ; Majerák, Vlastimil^2 ; Slávik, Ivan^1

Department of Geotechnics, Faculty of Civil Engineering, Slovak University of Technology, Radlinského 11, Bratislava

813 68, Slovakia^1

Slovenské Elektrárne, a.s., Mlynské nivy 47, Bratislava

821 09, Slovakia^2

关键词: Complicated geological conditions;    Comprehensive analysis;    Dam safety;    Pumped storage hydropower plants;    Reliable operation;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/95/2/022009/pdf
DOI  :  10.1088/1755-1315/95/2/022009

来源: IOP

【 摘 要 】

The pumped storage hydropower plant of ierny Váh was created by means of damming up the valley of the ierny Váh River. The dam is 18.5 m high above terrain and 375 m long in the dam's crest. Total capacity of the reservoir is 5.1 million m3. Complicated geological conditions in the subsoil of dam's body - fractured dolomite with local occurrence of tectonic breccia and clays, with the occurrence of intense disturbances - called for the construction of the grouting curtain in the dam's subsoil. Its depth is about 20 in the area of the riverine plain, and about 60 m in the areas of abutments. During foregoing operations of the structure, more than 30 years, local anomalies in the uplift development in the right abutment's subsoil of the lower reservoir dam were recorded. Their abnormally high values on the downstream side of grouting curtain have become the subject of extensive discussion and a stimulus for its remediation. To ensure reliable operation of the hydraulic structure a comprehensive analysis of the impact of the long-term operation of the reservoir on the dam safety was carried out. This included an examination of the causes of anomalous development of uplifts using FEM numerical modelling. The paper presents obtained results from this analysis.