Support aspects of tunnels in fault zones: Aspekte des Ausbaus von Tunneln in Störungszonen

Wulf Schubert, Manfred Blümel, Robert Staudacher, Stefan Brunnegger

Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

Abstract

Special considerations are required for the support of tunnels in fault zones. On the one hand, standard support elements are not compatible with the imposed displacements. On the other hand, local shearing can cause damage to the lining already at rather small displacements magnitudes. Cracks in the lining frequently are observed, when the geometry of the tunnel changes, or at the intersection with cross passages. As strengthening of the lining in many cases cannot prevent damage, temporarily leaving an open gap in the primary lining. Implementing yielding elements into the lining is as well feasible, as economical increasingly replaces the traditional method of leaving open gaps. This results in a better utilization of the lining's capacity and a considerable reduction of displacements. As the lining with integrated yielding elements develops considerable thrust, a transfer of the loads via the construction joints is required. Thus, careful construction of those joints is essential. Another problem can be the bond between bolt, grout, and rock mass, as the bolts are installed, when the displacement rate is highest, and the strength of the grout still low. This paper deals only with phenomena caused by discontinuities and large displacements, and does not address other hazards, like flowing ground.

Originalspracheenglisch
Seiten (von - bis)342-352
Seitenumfang11
FachzeitschriftGeomechanics and Tunnelling
Jahrgang10
Ausgabenummer4
DOIs
PublikationsstatusVeröffentlicht - 1 Aug 2017

Fingerprint

Linings
fault zone
Tunnels
tunnel
grout
bolt
Bolts
damage
discontinuity
crack
thrust
hazard
Shearing
geometry
Hazards
Rocks
Cracks
rock
Geometry

Schlagwörter

    ASJC Scopus subject areas

    • !!Civil and Structural Engineering
    • !!Geotechnical Engineering and Engineering Geology

    Dies zitieren

    Support aspects of tunnels in fault zones : Aspekte des Ausbaus von Tunneln in Störungszonen. / Schubert, Wulf; Blümel, Manfred; Staudacher, Robert; Brunnegger, Stefan.

    in: Geomechanics and Tunnelling , Jahrgang 10, Nr. 4, 01.08.2017, S. 342-352.

    Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

    @article{3165dc57ae2341b491012b1a652ccea1,
    title = "Support aspects of tunnels in fault zones: Aspekte des Ausbaus von Tunneln in St{\"o}rungszonen",
    abstract = "Special considerations are required for the support of tunnels in fault zones. On the one hand, standard support elements are not compatible with the imposed displacements. On the other hand, local shearing can cause damage to the lining already at rather small displacements magnitudes. Cracks in the lining frequently are observed, when the geometry of the tunnel changes, or at the intersection with cross passages. As strengthening of the lining in many cases cannot prevent damage, temporarily leaving an open gap in the primary lining. Implementing yielding elements into the lining is as well feasible, as economical increasingly replaces the traditional method of leaving open gaps. This results in a better utilization of the lining's capacity and a considerable reduction of displacements. As the lining with integrated yielding elements develops considerable thrust, a transfer of the loads via the construction joints is required. Thus, careful construction of those joints is essential. Another problem can be the bond between bolt, grout, and rock mass, as the bolts are installed, when the displacement rate is highest, and the strength of the grout still low. This paper deals only with phenomena caused by discontinuities and large displacements, and does not address other hazards, like flowing ground.",
    keywords = "construction joints, Conventional tunnelling, rock bolt, squeezing rock, Support, yielding elements",
    author = "Wulf Schubert and Manfred Bl{\"u}mel and Robert Staudacher and Stefan Brunnegger",
    year = "2017",
    month = "8",
    day = "1",
    doi = "10.1002/geot.201700015",
    language = "English",
    volume = "10",
    pages = "342--352",
    journal = "Geomechanics and Tunnelling",
    issn = "1865-7362",
    publisher = "Ernst & Sohn",
    number = "4",

    }

    TY - JOUR

    T1 - Support aspects of tunnels in fault zones

    T2 - Aspekte des Ausbaus von Tunneln in Störungszonen

    AU - Schubert, Wulf

    AU - Blümel, Manfred

    AU - Staudacher, Robert

    AU - Brunnegger, Stefan

    PY - 2017/8/1

    Y1 - 2017/8/1

    N2 - Special considerations are required for the support of tunnels in fault zones. On the one hand, standard support elements are not compatible with the imposed displacements. On the other hand, local shearing can cause damage to the lining already at rather small displacements magnitudes. Cracks in the lining frequently are observed, when the geometry of the tunnel changes, or at the intersection with cross passages. As strengthening of the lining in many cases cannot prevent damage, temporarily leaving an open gap in the primary lining. Implementing yielding elements into the lining is as well feasible, as economical increasingly replaces the traditional method of leaving open gaps. This results in a better utilization of the lining's capacity and a considerable reduction of displacements. As the lining with integrated yielding elements develops considerable thrust, a transfer of the loads via the construction joints is required. Thus, careful construction of those joints is essential. Another problem can be the bond between bolt, grout, and rock mass, as the bolts are installed, when the displacement rate is highest, and the strength of the grout still low. This paper deals only with phenomena caused by discontinuities and large displacements, and does not address other hazards, like flowing ground.

    AB - Special considerations are required for the support of tunnels in fault zones. On the one hand, standard support elements are not compatible with the imposed displacements. On the other hand, local shearing can cause damage to the lining already at rather small displacements magnitudes. Cracks in the lining frequently are observed, when the geometry of the tunnel changes, or at the intersection with cross passages. As strengthening of the lining in many cases cannot prevent damage, temporarily leaving an open gap in the primary lining. Implementing yielding elements into the lining is as well feasible, as economical increasingly replaces the traditional method of leaving open gaps. This results in a better utilization of the lining's capacity and a considerable reduction of displacements. As the lining with integrated yielding elements develops considerable thrust, a transfer of the loads via the construction joints is required. Thus, careful construction of those joints is essential. Another problem can be the bond between bolt, grout, and rock mass, as the bolts are installed, when the displacement rate is highest, and the strength of the grout still low. This paper deals only with phenomena caused by discontinuities and large displacements, and does not address other hazards, like flowing ground.

    KW - construction joints

    KW - Conventional tunnelling

    KW - rock bolt

    KW - squeezing rock

    KW - Support

    KW - yielding elements

    UR - http://www.scopus.com/inward/record.url?scp=85026629319&partnerID=8YFLogxK

    U2 - 10.1002/geot.201700015

    DO - 10.1002/geot.201700015

    M3 - Article

    VL - 10

    SP - 342

    EP - 352

    JO - Geomechanics and Tunnelling

    JF - Geomechanics and Tunnelling

    SN - 1865-7362

    IS - 4

    ER -