Technical measures – part of the flood protection of Bratislava

Year, pages: 2017, 210 - 216

To the group of hydrotechnical structures belong flood pools, dry retention reservoir, flood dikes and other flood control structures. These hydrotechnical structures design of new or restoration of existing structures represent an extremely complex problem. Special position among them represent the flood protection line structure, i.e. flood dikes or flood control walls in residential areas of towns and villages. In the proposed article, we present knowledge and experience related to the solutions of the flood protection design of Bratislava. One of their components was the design optimisation for subsoil protection of the flood wall between the bridge SNP and the harbour. We searched for the best option to seal the subsoil by parametric studies by using numerical modelling FEM to minimize the risk of exceeding filtration stability criteria in the adjacent environment and to eliminate seepage to the protected area. Due to the physical nature of the phenomenon, the problem was considered as transient phenomenon. Between piles was designed 5 m deep grouting respecting the criteria of the filtration stability for the geological composition of the environment and hydrodynamic loading at Q1000 = 13 500 m3s-1 for 12 days,. There was achieved reduction of hydraulic gradients to the required level at total depth of the piles 12.5 m and grouting depth determined by using numerical modelling. Current calculations also proved elimination of seepage through structural wall subsoil.

Bednárová, E., Grambličková, D. 2017. Technical measures – part of the flood protection of Bratislava. In Acta Hydrologica Slovaca, vol. 18, no.2, pp. 210-216. 2644-4690.

Bednárová, E., Grambličková, D. (2017). Technical measures – part of the flood protection of Bratislava. Acta Hydrologica Slovaca, 18(2), 210-216. 2644-4690.