Vergleich von Statik, Spannungsoptik und Messungen beim Bau der Kaverne Waldeck II

Abraham, Kurt Heinz; Barth, Steffen; Bräutigam, Friedhelm; Hereth, Adam; Müller-Salzburg, Leopold; Pahl, A.; Rescher, Othmar-J.

doi:10.1007/978-3-7091-8372-4_16

Cited by 2 publications

(1 citation statement)

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“…Consequently, in addition to a more intensive monitor ing, additional rock bolts with a length of 12 m were in stalled in the sidewalls of the pillars between the longitudi nal cavern west and the cross cavern 2. Longer or pre stressed rock bolts, as have been used on similar construc tion projects [4], were not necessary due to the observations regarding the stability of the entire intersection area. Addi tional rock bolts were also installed in the crown to achieve an improvement of the rock mass above.…”

Section: Geotechnische Planungmentioning

confidence: 99%

Semmering Base Tunnel – Excavation of the emergency station in complex ground conditions

Poisel

Weigl

Schachinger³

et al. 2017

Geomechanics and Tunnelling

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At the construction lot SBT 2.1 ”Tunnel Fröschnitzgraben“ of the Semmering Base Tunnel (SBT) in Austria caverns with a cross section up to 300 m2 are excavated in a depth of approximately 400 m, which are the central part of the emergency station. The site arrangement results in a complex situation of large cross sections within a small area. Additionally, complex ground conditions exist, because the degree of fracturing of the rock mass differs frequently and the rock mass strength is occasionally very low. Especially at the intersection of the caverns displacements increase over a long period of time. The observed system behavior is described and analyzed based on the geotechnical design taking the encountered ground conditions into account. Sequences of rock mass sections with different stiffness and strength are of high geomechanical significance due to stress concentrations in the competent areas. This had particular impact on the observed system behavior. With regard to the stability of the overall system influences of various drives and the excavation of large cross sections in several steps must be considered. Moreover, an influence of the excavation size on the extension of the area with displacement increases or stress redistributions must be taken into account.

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Section: Geotechnische Planungmentioning

confidence: 99%