Publication detail

Defects of AC lining at Josefův Důl dam and their refurbishment

ŘÍHA, J. ŠPANO, M.

Original Title

Defects of AC lining at Josefův Důl dam and their refurbishment

Type

journal article - other

Language

English

Original Abstract

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.

Keywords

dam escarpments, asphalt reinforcement, defects, sealings repair

Authors

ŘÍHA, J.; ŠPANO, M.

Released

6. 9. 2021

Publisher

SIGMA - NOT, Sp. z o.o.

Location

Warszawa, PL

ISBN

0017-2448

Periodical

Gospodarka wodna

Year of study

873

Number

9/2021

State

Republic of Poland

Pages from

17

Pages to

22

Pages count

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/"
}