Pre-excavation grouting in rock tunneling: Dealing with high groundwater pressures

Hans-Olav Hognestad, Daniel Scott Kieffer

Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

Abstract

In rock tunneling, pre-excavation grouting (or, pre-injection) refers to systematic treatment of the rock mass ahead of an advancing tunnel face via pressure grouting. The main purpose of pre-excavation grouting is to reduce water inflows, or to improve geomechanical properties of the rock mass. This paper summarizes approaches for treating competent rock masses with systematic pre-injection of cementitious grouts through boreholes drilled from the working tunnel face. The focus is on traditional cement based grouting technology and drill-and-blast tunneling under high static groundwater pressures (> 20 bar). Post-injection, where drilling and grouting is performed somewhere behind the tunnel face, provides an additional means for achieving a high degree of watertightness, but is beyond the scope of this paper.

Originalspracheenglisch
Seiten (von - bis)141-146
Seitenumfang6
FachzeitschriftGeomechanics and Tunnelling
Jahrgang12
Ausgabenummer2
DOIs
PublikationsstatusVeröffentlicht - 1 Apr 2019

Fingerprint

Grouting
grouting
Excavation
Groundwater
excavation
Rocks
groundwater
Tunnels
tunnel
rock
drill and blast
Boreholes
Drilling
Cements
cement
inflow
borehole
drilling
Water
water

Schlagwörter

    ASJC Scopus subject areas

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

    Fields of Expertise

    • Sustainable Systems

    Dies zitieren

    Pre-excavation grouting in rock tunneling : Dealing with high groundwater pressures. / Hognestad, Hans-Olav; Kieffer, Daniel Scott.

    in: Geomechanics and Tunnelling , Jahrgang 12, Nr. 2, 01.04.2019, S. 141-146.

    Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

    @article{f814faafc497465694d08bacc56428dc,
    title = "Pre-excavation grouting in rock tunneling: Dealing with high groundwater pressures",
    abstract = "In rock tunneling, pre-excavation grouting (or, pre-injection) refers to systematic treatment of the rock mass ahead of an advancing tunnel face via pressure grouting. The main purpose of pre-excavation grouting is to reduce water inflows, or to improve geomechanical properties of the rock mass. This paper summarizes approaches for treating competent rock masses with systematic pre-injection of cementitious grouts through boreholes drilled from the working tunnel face. The focus is on traditional cement based grouting technology and drill-and-blast tunneling under high static groundwater pressures (> 20 bar). Post-injection, where drilling and grouting is performed somewhere behind the tunnel face, provides an additional means for achieving a high degree of watertightness, but is beyond the scope of this paper.",
    keywords = "Conventional tunnelling, Drainage and sealings, ground improvement, Grouting, high groundwater pressure, pre-injection, rock tunneling",
    author = "Hans-Olav Hognestad and Kieffer, {Daniel Scott}",
    year = "2019",
    month = "4",
    day = "1",
    doi = "10.1002/geot.201800071",
    language = "English",
    volume = "12",
    pages = "141--146",
    journal = "Geomechanics and Tunnelling",
    issn = "1865-7362",
    publisher = "Ernst & Sohn",
    number = "2",

    }

    TY - JOUR

    T1 - Pre-excavation grouting in rock tunneling

    T2 - Dealing with high groundwater pressures

    AU - Hognestad, Hans-Olav

    AU - Kieffer, Daniel Scott

    PY - 2019/4/1

    Y1 - 2019/4/1

    N2 - In rock tunneling, pre-excavation grouting (or, pre-injection) refers to systematic treatment of the rock mass ahead of an advancing tunnel face via pressure grouting. The main purpose of pre-excavation grouting is to reduce water inflows, or to improve geomechanical properties of the rock mass. This paper summarizes approaches for treating competent rock masses with systematic pre-injection of cementitious grouts through boreholes drilled from the working tunnel face. The focus is on traditional cement based grouting technology and drill-and-blast tunneling under high static groundwater pressures (> 20 bar). Post-injection, where drilling and grouting is performed somewhere behind the tunnel face, provides an additional means for achieving a high degree of watertightness, but is beyond the scope of this paper.

    AB - In rock tunneling, pre-excavation grouting (or, pre-injection) refers to systematic treatment of the rock mass ahead of an advancing tunnel face via pressure grouting. The main purpose of pre-excavation grouting is to reduce water inflows, or to improve geomechanical properties of the rock mass. This paper summarizes approaches for treating competent rock masses with systematic pre-injection of cementitious grouts through boreholes drilled from the working tunnel face. The focus is on traditional cement based grouting technology and drill-and-blast tunneling under high static groundwater pressures (> 20 bar). Post-injection, where drilling and grouting is performed somewhere behind the tunnel face, provides an additional means for achieving a high degree of watertightness, but is beyond the scope of this paper.

    KW - Conventional tunnelling

    KW - Drainage and sealings

    KW - ground improvement

    KW - Grouting

    KW - high groundwater pressure

    KW - pre-injection

    KW - rock tunneling

    UR - http://www.scopus.com/inward/record.url?scp=85064069945&partnerID=8YFLogxK

    U2 - 10.1002/geot.201800071

    DO - 10.1002/geot.201800071

    M3 - Article

    VL - 12

    SP - 141

    EP - 146

    JO - Geomechanics and Tunnelling

    JF - Geomechanics and Tunnelling

    SN - 1865-7362

    IS - 2

    ER -