Bettungsverbesserung von Tübbingringen mittels Geotextilschläuchen

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

Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

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.

Titel in ÜbersetzungBedding improvement of lining segments using geotextile tubes
Originalsprachedeutsch
Seiten (von - bis)589-598
Seitenumfang10
FachzeitschriftGeomechanics and Tunnelling
Jahrgang11
Ausgabenummer5
DOIs
PublikationsstatusVeröffentlicht - 1 Okt 2018

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

Schlagwörter

  • annular gap
  • Mechanised tunnelling
  • pea gravel
  • segment bedding
  • Support

ASJC Scopus subject areas

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

Fields of Expertise

  • Sustainable Systems

Treatment code (Nähere Zuordnung)

  • Application

Dies zitieren

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

in: Geomechanics and Tunnelling , Jahrgang 11, Nr. 5, 01.10.2018, S. 589-598.

Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

Henzinger, Michael R. ; Lange, Andreas ; Volkmann, Günther M. ; Moritz, Bernd A. ; Schubert, Wulf. / Bettungsverbesserung von Tübbingringen mittels Geotextilschläuchen. in: Geomechanics and Tunnelling . 2018 ; Jahrgang 11, Nr. 5. S. 589-598.
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