Detail publikace

Defects of AC lining at Josefův Důl dam and their refurbishment

ŘÍHA, J. ŠPANO, M.

Originální název

Defects of AC lining at Josefův Důl dam and their refurbishment

Typ

článek v časopise - ostatní, Jost

Jazyk

angličtina

Originální abstrakt

The Josefův Důl embankment dam is located in the Czech Republic on the river Kamenice, about 15.5 km away from the Czech boundary with Poland. It consists of the main dam with the crown length 360 m and height 44 m above the foundation, and the auxiliary dam with the crown length 360 m and the height of 15 m above the foundation. Both dams are covered upstream with asphalt concrete (AC) lining serving as impervious membrane. As the results of permeability pressure tests did not meet the design requirements, a new asphalt layer was placed on the original AC lining just after the dam commissioning. It was placed on the entire surface of the auxiliary dam and only along a few strips at the main dam. Plastic deformations of the upper, newly added layer have occurred, mainly at the auxiliary dam. The first defects appeared in the years 2007 and 2008, when – following wetting of the mantle at the auxiliary dam – bulges appeared on considerable part of the surface. Since 2014, many significant defects have repeatedly occurred, in particular at the locations of repairs. In 2015, new cracks appeared on another considerable area of the auxiliary dam. The main damage was repaired locally with a COLETANCHE bitumen strip. In the following years, further local repairs were carried out on the damaged surfaces of the additional AC layer. The paper describes and makes an assessment of the AC lining and proposes possible variants of lining repair, listing the expected advantages and disadvantages. For provisional repairs, the authors recommend the extension of the structure’s service life by application of a protective mastic coating at both dams.

Klíčová slova

dam escarpments, asphalt reinforcement, defects, sealings repair

Autoři

ŘÍHA, J.; ŠPANO, M.

Vydáno

6. 9. 2021

Nakladatel

SIGMA - NOT, Sp. z o.o.

Místo

Warszawa, PL

ISSN

0017-2448

Periodikum

Gospodarka wodna

Ročník

873

Číslo

9/2021

Stát

Polská republika

Strany od

17

Strany do

22

Strany počet

7

URL

https://gospodarkawodna.net/

BibTex

@article{BUT172432,
  author="Jaromír {Říha} and Miroslav {Špano}",
  title="Defects of AC lining at Josefův Důl dam and their refurbishment",
  journal="Gospodarka wodna",
  year="2021",
  volume="873",
  number="9/2021",
  pages="17--22",
  issn="0017-2448",
  url="https://gospodarkawodna.net/"
}