CONSTRUCTIONAL AND ECONOMIC ASPECTS OF TUNNEL CONSTRUCTION

ASPECTOS CONSTRUCTIVOS Y ECONOMICOS DE LA CONSTRUCCION DE TUNELES

The constructional problems of a tunnel can be divided into three main groups: a) the project stage; b) procedures or construction methods; and c) formulae for contracting. With regard to the first group, a study is made of the effect of an analysis and mapping of the ground on the tunnel project, and it is concluded that the more detailed the survey, investigation and mapping of the ground, the more satisfactory the results will be. Concerning the second aspect, the influence of the excavation process, soil support and loading, and removal of rubble is examined. When contracting underground works, the following points must be taken into consideration: 1) projects should be carried out rationally with regard to economic and construction aspects; 2) budgets should be flexible; 3) the greatest possible number of unit prices should be available for the different types of support; 4) the excavation price and the lining costs should be considered as variable. The contracting process should be as follows: a) updating of the estimated cost, b) direct control of the actual cost, and c) certification on a monthly basis and at origin. See also IRRD abstract No. 216643. /TRRL/

  • Corporate Authors:

    Ministry of Public Works, Spain

    Calle Alfonso XII 3
    Madrid 7,   Spain 
  • Authors:
    • Duelo, C
  • Publication Date: 1975-5

Language

  • Spanish

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00131787
  • Record Type: Publication
  • Source Agency: Transportation & Soil Mechanics Laboratory, Spain
  • Report/Paper Numbers: Conf Paper
  • Files: ITRD, TRIS
  • Created Date: Jun 5 1976 12:00AM