Bedding improvement of lining segments using geotextile tubes

Michael R. Henzinger, Andreas Lange, Günther M. Volkmann, Bernd A. Moritz, Wulf Schubert

Research output: Contribution to journalArticleResearchpeer-review

Abstract

During a shield TBM excavation in hard rock, the immediate backfill of the crown immediately behind the shield is technically difficult to realize. With the advance of the cutter head a relocation process of pea gravel within the annular gap is triggered, leading to an insufficient bedding distribution of the first segments behind the shield tail and to an ovalization of the segmental lining at a certain load level. During a test application as part of an ”TBM research initiative“ of the Austrian Federal Railways geotextile tubes were integrated into the exterior surface of the segments. Immediately after leaving the shield tail, the geotextile tube, which is placed all around one ring of segments, is expanded by injection with grout. As a result, an immediate bedding between the rock mass and segmental lining is established, also preventing the rearrangement of pea gravel within the annular gap when the shield is moved forward. The displacement measurements have shown that the ring of segments equipped with geotextile tubes experiences a more rigid body motion like behaviour after leaving the shield tail with a minimal ovalization only. Numerical simulations show the influence of bedding improvement on the ovalization of the ring of segments after leaving the shield tail.

Translated title of the contributionBedding improvement of lining segments using geotextile tubes
LanguageGerman
Pages589-598
Number of pages10
JournalGeomechanics and Tunnelling = Geomechanik und Tunnelbau
Volume11
Issue number5
DOIs
StatusPublished - 1 Oct 2018

Fingerprint

Geotextiles
geotextile
Linings
shield
Gravel
Rocks
Displacement measurement
Relocation
TBM
Excavation
gravel
Computer simulation
grout
backfill
hard rock
relocation
railway
excavation
rock
simulation

Keywords

    ASJC Scopus subject areas

    • Civil and Structural Engineering
    • Geotechnical Engineering and Engineering Geology

    Fields of Expertise

    • Sustainable Systems

    Treatment code (Nähere Zuordnung)

    • Application

    Cite this

    Bettungsverbesserung von Tübbingringen mittels Geotextilschläuchen. / Henzinger, Michael R.; Lange, Andreas; Volkmann, Günther M.; Moritz, Bernd A.; Schubert, Wulf.

    In: Geomechanics and Tunnelling = Geomechanik und Tunnelbau, Vol. 11, No. 5, 01.10.2018, p. 589-598.

    Research output: Contribution to journalArticleResearchpeer-review

    Henzinger, Michael R. ; Lange, Andreas ; Volkmann, Günther M. ; Moritz, Bernd A. ; Schubert, Wulf. / Bettungsverbesserung von Tübbingringen mittels Geotextilschläuchen. In: Geomechanics and Tunnelling = Geomechanik und Tunnelbau. 2018 ; Vol. 11, No. 5. pp. 589-598.
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