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Statements

Subject Item
n2:RIV%2F68407700%3A21110%2F13%3A00207143%21RIV14-GA0-21110___
rdf:type
n11:Vysledek skos:Concept
dcterms:description
The utilisation of steel fibre reinforced concrete (SFRC) instead of traditional reinforced concrete (RC) for some structures can bring many advantages. All advantages are given by properties of SFRC, partly by strength properties, mainly by strain characteristics. An appropriate concrete structure for utilisation of SFRC can be tunnel lining generated from precast concrete segments. The loading of precast concrete segments, namely during installation of segments, leads often to mechanical damage of joints. The utilisation of SFRC for tunnel segments can reduce damage of joints, which is one of many advantages of the SFRC utilisation for tunnel segments. The main goal is to show approach to replacement of used material (i.e. approach from the design of concrete composition to results of experimental testing of key segment generated from SFRC without traditional rebars). Properties of SFRC were verified on standard samples. Uniaxial strength was veri-fied on cubes (150 mm), flexural strength was verified on beams (700 x 150 x 150 mm). Two dosages of steel fibres (50 kg/m3 and 70 kg/m3) together with two types of steel fibres (Dramix and Tri Treg) were verified by laboratory testing to achieve material stability during transport, tunnel lining installa-tion, and during its lifetime, mainly with regards to given thickness of segments 250 mm (construction of Prague metro line A extension). The utilisation of steel fibre reinforced concrete (SFRC) instead of traditional reinforced concrete (RC) for some structures can bring many advantages. All advantages are given by properties of SFRC, partly by strength properties, mainly by strain characteristics. An appropriate concrete structure for utilisation of SFRC can be tunnel lining generated from precast concrete segments. The loading of precast concrete segments, namely during installation of segments, leads often to mechanical damage of joints. The utilisation of SFRC for tunnel segments can reduce damage of joints, which is one of many advantages of the SFRC utilisation for tunnel segments. The main goal is to show approach to replacement of used material (i.e. approach from the design of concrete composition to results of experimental testing of key segment generated from SFRC without traditional rebars). Properties of SFRC were verified on standard samples. Uniaxial strength was veri-fied on cubes (150 mm), flexural strength was verified on beams (700 x 150 x 150 mm). Two dosages of steel fibres (50 kg/m3 and 70 kg/m3) together with two types of steel fibres (Dramix and Tri Treg) were verified by laboratory testing to achieve material stability during transport, tunnel lining installa-tion, and during its lifetime, mainly with regards to given thickness of segments 250 mm (construction of Prague metro line A extension).
dcterms:title
Laboratory testing of SFRC samples proposed for tunnel lining segments Laboratory testing of SFRC samples proposed for tunnel lining segments
skos:prefLabel
Laboratory testing of SFRC samples proposed for tunnel lining segments Laboratory testing of SFRC samples proposed for tunnel lining segments
skos:notation
RIV/68407700:21110/13:00207143!RIV14-GA0-21110___
n11:predkladatel
n12:orjk%3A21110
n3:aktivita
n19:P
n3:aktivity
P(GAP104/10/2023)
n3:dodaniDat
n13:2014
n3:domaciTvurceVysledku
n4:9499466 n4:9370781 n4:7715730 n4:7323883
n3:druhVysledku
n15:D
n3:duvernostUdaju
n6:S
n3:entitaPredkladatele
n16:predkladatel
n3:idSjednocenehoVysledku
84186
n3:idVysledku
RIV/68407700:21110/13:00207143
n3:jazykVysledku
n17:eng
n3:klicovaSlova
tunnel; segmental lining; steel fibre reinforced concrete; SFRC; experimental testing
n3:klicoveSlovo
n5:experimental%20testing n5:tunnel n5:segmental%20lining n5:steel%20fibre%20reinforced%20concrete n5:SFRC
n3:kontrolniKodProRIV
[6A99EBFD8570]
n3:mistoKonaniAkce
Praha
n3:mistoVydani
Praha
n3:nazevZdroje
Podzemní stavby Praha 2013
n3:obor
n22:JN
n3:pocetDomacichTvurcuVysledku
4
n3:pocetTvurcuVysledku
4
n3:projekt
n20:GAP104%2F10%2F2023
n3:rokUplatneniVysledku
n13:2013
n3:tvurceVysledku
Krátký, Jiří Vodička, Jan Hilar, Matouš Ráček, Václav
n3:typAkce
n14:EUR
n3:zahajeniAkce
2013-04-22+02:00
s:numberOfPages
1
n8:hasPublisher
Česká tunelářská asociace ITA-AITES
n18:isbn
978-80-260-3867-2
n10:organizacniJednotka
21110