ITU L.11:1988
ITU L.11:1988 Joint Use Of Tunnels By Pipelines And Telecommunication Cables, And The Standardization Of Underground Duct Plans
Table of Contents
1Generalconsiderations2Establishmentofaroutingplan
2.1Structure
2.2Decisioncriteria
3Recommendationsapplicabletotunnels
3.1Phases
3.2Generalrecommendations
3.3Commentsondistributionnetworks
4Safetyplan
4.1Safetyobjectives
4.2Safetyplan
4.3Specialproblemstobeconsidered
5Construction
5.1Transversalcross-section
5.2Openings,accessandpartitions
5.3Supportsandfixtures
5.4Transitpointsbetweentunnelsandopenground
5.5Shut-offdevices
5.6Ventilation
5.7Waterdrainage
5.8Signallingsystems
5.9Otherserviceinstallations
6Standardizationofplansforundergroundductsin
tunnelsusedjointlyforpipelinesand
telecommunicationcables
6.1Introduction
6.2Terminology
6.3Fieldofapplication
6.4Rulesapplicabletoundergroundductplans
6.5Basicplan
6.6Ductornetworkplans
6.7Preparationofplans
6.8Useofdataprocessingsystemsfgeneralanalysis
6.9Maintainingplansuptodate
6.10Modelplan
ANNEXA
ANNEXB-Examplesoftunnelprofiles
ANNEXC-Modelplan