A METHOD FOR THE ANALYSIS AND DESIGN OF FLEXIBLE RETAINING STRUCTURES - APPLICATION TO A STRUTTED EXCAVATION. PROCEEDINGS OF THE SIXTH INTERNATIONAL CONFERENCE ON NUMERICAL METHODS IN GEOMECHANICS, 11-15 APRIL 1988, INNSBRUCK, AUSTRIA. VOLUMES 1 - 3

A simple and economical method for the analysis of flexible retaining structures is presented in this paper. The procedure is a modified Winkler method in which soil is modelled as a bed of elastic-plastic strain hardening springs. Emphasis is put more on the constitutive law than on the continuity of deformation. The parameters used in the constitutive law are all traditional soil constants such as friction angle, virgin and unloading-reloading stiffness, and coefficient of earth pressure. The method is used to design the diaphragm walls executed in alluvial soil at Lamarmura station on the Milan underground railway. One of the walls is anchored at 2 levels whereas the other is linked to it by 13 m provisional struts. The adjacent tunnel is separated from the diaphragm wall by a thin wall of jet grouted soil. The results of the analysis are compared with measured displacements and forces in the struts. The results show that the method is able to match the measured trend of displacements and forces in the struts, in spite of the scanty experimental information on soil characteristics and the complexity of the excavation procedure. Quantitative agreement is not fully obtained but the deviation between observed and calculated results is still acceptable. The method is much quicker than the simple finite element analysis. (TRRL)

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  • Corporate Authors:

    AA Balkema

    P.O. Box 1675
    Rotterdam,   Netherlands  BR-3000
  • Authors:
    • Barla, G
    • Becci, B
    • Colombo, A
    • Nova, R
    • Peduzzi, R
  • Publication Date: 1988

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  • Accession Number: 00492689
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 90-6191-809-X
  • Files: ITRD, TRIS
  • Created Date: Mar 31 1990 12:00AM