2. Tunnels, Tunnel construction, Design, Tunnel linings, Soil‐structure interaction, Clays, Shotcrete
ARTICLE DATA
DIGITAL OBJECT IDENTIFIER
http://dx.doi.org/10.1061/(ASCE)0733-9410(1992)118:4(558)
PUBLICATION DATA
ISSN
0733-9410 (print)
Publisher
ASCE
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Title:
PRELIMINARY DESIGN FOR NATM TUNNEL SUPPORT IN SOIL
Accession Number:
00621090
Availability:
American Society of Civil Engineers
345 East 47th Street
New York, NY 10017-2398 USA
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Order URL: http://worldcat.org/issn/07339410
Abstract:
A finite element is used in a parametric study of the excavation and support of a shallow tunnel using the NATM (New Austrian
Tunnelling Method). The results are then cast in a form so that the moments and thrusts in a proposed liner can be easily obtained.
The method only addresses the initial liner system. Using the same approach, a theoretical estimate can be obtained for the
maximum settlement generated at ground surface. The method described is expected to assist in trade-off analyses and provide
information to help guide better use of the more sophisticated analyses. The study considers the problem of NATM tunnels
constructed in undrained clays. Details of the study are described, and the results are discussed.
Corporate Authors:
American Society of Civil Engineers
3. 345 East 47th Street
New York, NY 10017-2398 USA
Authors:
LECA, E
Clough, G W
Pagination:
p. 558-575
Publication Date:
1992-4
Serial:
Journal of Geotechnical Engineering
Volume: 118
Issue Number: 4
Publisher: American Society of Civil Engineers
ISSN: 0733-9410
Features:
Appendices (2) ; Figures; References
Index Terms:
Clay; Excavation and tunneling; NATM (Tunneling); New Austrian Tunneling Method; Saturated soils; Structural design;
Tunnel design; Tunnel lining; Tunnel supports; Tunneling; Tunnels; Undrained conditions
Subject Areas:
Bridges and other structures; Geotechnology; Highways; I42: Soil Mechanics
Files:
HRIS
Last Modified:
Apr 30 1992 12:00AM
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STABILIZING COMPACTED CLAY AGAINST CHEMICAL ATTACK. DISCUSSION
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Preliminary Design for NATM Tunnel Support in Soil
byEric Leca, (Virginia Polytech. Inst. and State Univ., Blacksburg, VA; EcoleNationale des
PontsetChaussées, ENPC, Paris, France) and G. Wayne Clough, F.ASCE, (Dean of the Coll. of
Engrg., Virginia Polytech. Inst. and State Univ., Blacksburg, VA)
Journal of Geotechnical Engineering, Vol. 118, No. 4, April 1992, pp. 558-575,
(doi http://dx.doi.org/10.1061/(ASCE)0733-9410(1992)118:4(558))
Purchase this Article/Access full text
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Document Journal Paper
type:
Abstract: Design of tunnels constructed with the new Austrian tunneling method (NATM) is
considered. With this method the tunnel is generally excavated using hand-mining
equipment and immediately supported with a continuous shell of shotcrete. The shotcrete
acts as a preliminary support during the construction. A liner made of precast concrete
segments is usually installed later to ensure the long-term stability of the tunnel wall. The
construction process of NATM tunnels is analyzed using the finite element method. The
softening technique, currently used for the analysis of NATM tunnels, is improved and
applied to a parametric study of ovoid transportation tunnels constructed in undrained
clays. Based on this study, a simplified method is provided for the preliminary design of
the NATM tunnel support. The method allows the estimation of moments and thrusts
acting on the liner for a range of commonly encountered conditions. Design values are
shown to be primarily dependent on soil deformation properties, initial stress conditions,
5. and amounts of stress release in the ground prior to shotcreting.
Preliminary Design for NATM Tunnel Support in Soil
J. Geotech. Engrg. 118, 558 (1992); http://dx.doi.org/10.1061/(ASCE)0733-9410(1992)118:4(558) (18 pages)
1 2
Eric Leca and G. Wayne Clough, Fellow, ASCE
1
Virginia Polytech.Inst. and State Univ., Blacksburg, VA.EcoleNationale des PontsetChaussées, ENPC, 93167 Noisy ‐le‐Grand, France
2
Dean of Coll. of Engrg., Virginia Polytech. Inst. and State Univ., Blacksburg, VA 24061
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Abstract
References (13)
Design of tunnels constructed with the new Austrian tunneling method (NATM) is considered. With this method the
tunnel is generally excavated using hand‐mining equipment and immediately supported with a continuous shell of
shotcrete. The shotcrete acts as a preliminary support during the construction. A liner made of concrete is usually
installed later to ensure the long‐term stability of the tunnel wall. The construction process of NATM tunnels is
analyzed using the finite element method. The softening technique, currently used for the analysis of NATM tunnels,
is improved and applied to a parametric study of ovoid transportation tunnels constructed in undrained clays. Based
on this study, a simplified method is provided for the preliminary design of the NATM tunnel support. The method
allows the estimation of moments and thrusts acting on the liner for a range of commonly encountered conditions.
Design values are shown to be primarily dependent on soil deformation properties, initial stress conditions, and
amounts of stress release in the ground prior to shotcreting.
7. Preliminary Design for NATM Tunnel Support in Soil
byEric Leca, (Virginia Polytech. Inst. and State Univ., Blacksburg, VA; EcoleNationale des Ponts et
Chaussées, ENPC, Paris, France) and G. Wayne Clough, F.ASCE, (Dean of the Coll. of Engrg., Virginia
Polytech. Inst. and State Univ., Blacksburg, VA)
Journal of Geotechnical Engineering, Vol. 118, No. 4, April 1992, pp. 558-575,
(doi http://dx.doi.org/10.1061/(ASCE)0733-9410(1992)118:4(558))
Purchase this Article/Access full text
Permissions for Reuse
Document Journal Paper
type:
Abstract: Design of tunnels constructed with the new Austrian tunneling method (NATM) is
considered. With this method the tunnel is generally excavated using hand-mining
equipment and immediately supported with a continuous shell of shotcrete. The shotcrete
acts as a preliminary support during the construction. A liner made of precast concrete
segments is usually installed later to ensure the long-term stability of the tunnel wall. The
construction process of NATM tunnels is analyzed using the finite element method. The
softening technique, currently used for the analysis of NATM tunnels, is improved and
applied to a parametric study of ovoid transportation tunnels constructed in undrained
clays. Based on this study, a simplified method is provided for the preliminary design of
the NATM tunnel support. The method allows the estimation of moments and thrusts
acting on the liner for a range of commonly encountered conditions. Design values are
shown to be primarily dependent on soil deformation properties, initial stress conditions,
and amounts of stress release in the ground prior to shotcreting.
ASCE Subject Headings:
Clays
Construction
Design
Linings
Shotcrete
Soil-structure interactions
