Roadstead modernization of the Kořensko canal lock

Other Civil Engineering Works
Kořensko

The basic structure of the construction was the erection of a vertical waterfront wall in the upper part of the canal lock roadstead for waiting of 1st class watercrafts.

Basic information

Project Investor:

Ředitelství vodních cest ČR

Project Designer:

TRANSCONSULT s.r.o.

Project Duration:

09/2016 – 06/2017

Project in numbers

  • 1.6 m New navigation depth in the Vltava river bed
  • 2.7 m Navigation depth in the waiting spots
  • 6.0 m New width of the navigation route
  • 44 x 5.6 m Proposed dimensions of a 1st class watercraft
  • 20 m Length of a small watercraft
  • 65.36 m Length of the built waterfront wall

Characteristics

The basic structure of the construction was the erection of a vertical waterfront wall in the upper part of the canal lock roadstead for waiting of 1st class watercrafts. Its structure consists of an anchored sheet pile wall. Fixed jetties were used for allowing small watercraft to wait in the upper roadstead and both watercraft types in the lower roadstead. The jetty columns were installed into the stilt foundations. The modernization process included some excavation of the Vltava river bed, fortification of the shore slopes, sewerage system modifications, construction of an access road, electric facilities and nautical signs, and a reconstruction of the lock control system.

Building exceptionality

The operation of any of the roadsteads was not interrupted during the construction process. By changing the stilt embedding technology for mooring watercraft at the lower roadstead, where the entire area is geologically very diverse, we managed to achieve an optimal cost of the work as well as the construction time. We achieved that despite the fact that the structure was at a location that is influenced by storage of the Orlík waterworks, as a result of which the water level at its downstream fluctuated between almost zero – i.e. dry – to 3.5 meters of water in the river bed. The waterflow had also an impact on the Hněvkovice small water power plant and for filling cooling water into the nuclear power plant reactors – all f that within minutes and not hours, as it is common.