STABILITY OF A DEEP EXCAVATION IN DIAGENETICALLY CONSOLIDATED MUDSTONE

STANDISCHERHEIT EINER TIEFEN BAUGRUBE IM DIAGENETISCH VERFESTIGTEN TONGESTEIN

During the construction of the 5.5 km long Hasenberg tunnel for the S-bahn Stuttgart an approximately 25 M deep, 220 M long and 20-30 M wide open pit was excavated in the diagenetically consolidated mudstone of the lias alpha and knollenmergel formation. The horizontal displacements of the side walls of up to 65 mm and the heaving of the invert of 45 mm measured during construction were not expected though extensive explorations were carried out before construction started. Parallel to the excavation extensive finite element analyses were carried out to interpret these displacements. It could be concluded, that the observations can only be explained by the presence of horizontal in situ stresses of 1-2 mn/M squared, which are in accordance with the history of origin of the rock. The number of the covering abstract of the congress is TRIS no. 385148. (Author/TRRL)

  • Availability:
  • Supplemental Notes:
    • This paper was presented at the Fifth International Congress on Rock Mechanics, Melbourne, Australia, 1983, Volume 2, Theme C.
  • Corporate Authors:

    AA Balkema

    P.O. Box 1675
    Rotterdam,   Netherlands  BR-3000

    Australasian Institute of Mining and Metallurgy

    204 Lygon Street
    Carlton, Victoria  Australia  3053
  • Authors:
    • GRUETER, R
    • Wittke, W
  • Publication Date: 1983

Language

  • Dutch

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00385196
  • Record Type: Publication
  • Source Agency: ARRB
  • ISBN: 90 6191 237 7
  • Report/Paper Numbers: BOOK
  • Files: ITRD, TRIS, ATRI
  • Created Date: Jun 28 1984 12:00AM