Risk management during headrace tunnel reconstruction in Turkey

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F19%3A00337487" target="_blank" >RIV/68407700:21110/19:00337487 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.ita-aites.cz/cz/" target="_blank" >https://www.ita-aites.cz/cz/</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Risk management during headrace tunnel reconstruction in Turkey

Popis výsledku v původním jazyce

An operation of a hydro power project in North Turkey started in 2015. The project included 12 km long headrace tunnel. 8 km long lower (output) tunnel section was excavated by double shield (TBM technology) with 8.7 m ID. Due to problems with mechanised excavation, 4 km long upper (input) tunnel section was excavated as a counter drive conventionally by Drill and Blast (D&B) method with single shell lining generated from fibre reinforced sprayed concrete and rock bolts. Significant operational problems were observed in September 2016 (about 16 months after its commissioning). The flooded tunnel was initially investigated by underwater Remotely Operated Vehicle (ROV) which indicated significant collapses in the tunnel. An operation of the power station had to be stopped and water from a supply dam at the headrace tunnel inlet had to be discharged to enable dewatering and inspection of the headrace tunnel. Consequent investigation revealed three major collapses and many other various damages in the D&B section of the tunnel, significant damages were also observed in the tunnel section with segmental lining. Repair and strengthening of the tunnel was completed in October 2017 (about one year after detection of problems), a very fast tunnel re-opening was considered as a significant success taking into account scale of damages and access difficulties. This paper is focused on all activities associated with the tunnel repair.

Název v anglickém jazyce

Risk management during headrace tunnel reconstruction in Turkey

Popis výsledku anglicky

An operation of a hydro power project in North Turkey started in 2015. The project included 12 km long headrace tunnel. 8 km long lower (output) tunnel section was excavated by double shield (TBM technology) with 8.7 m ID. Due to problems with mechanised excavation, 4 km long upper (input) tunnel section was excavated as a counter drive conventionally by Drill and Blast (D&B) method with single shell lining generated from fibre reinforced sprayed concrete and rock bolts. Significant operational problems were observed in September 2016 (about 16 months after its commissioning). The flooded tunnel was initially investigated by underwater Remotely Operated Vehicle (ROV) which indicated significant collapses in the tunnel. An operation of the power station had to be stopped and water from a supply dam at the headrace tunnel inlet had to be discharged to enable dewatering and inspection of the headrace tunnel. Consequent investigation revealed three major collapses and many other various damages in the D&B section of the tunnel, significant damages were also observed in the tunnel section with segmental lining. Repair and strengthening of the tunnel was completed in October 2017 (about one year after detection of problems), a very fast tunnel re-opening was considered as a significant success taking into account scale of damages and access difficulties. This paper is focused on all activities associated with the tunnel repair.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/TE01020168" target="_blank" >TE01020168: Centrum pro efektivní a udržitelnou dopravní infrastrukturu (CESTI)</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Underground Construction Prague 2019

ISBN

978-80-906452-3-3

ISSN

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e-ISSN

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Počet stran výsledku

7

Strana od-do

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Název nakladatele

Česká tunelářská asociace ITA-AITES

Místo vydání

Praha

Místo konání akce

Praha

Datum konání akce

3. 6. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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