Architecture and management of a geological repository - Andra

7 – The shafts and the drifts7.4.2.2 Connecting drift functions and equipmentThis section shows the examples of the various types of connecting drifts indicated in chapter 6.• Package transfer driftsThe main function of these drifts is the transfer of the packages between the package transfer shaft andthe access drifts to the cells.In addition, these drifts ensure the supply of fresh air to the modules in operation for all the zones (seechapter 6).It should be noted that these drifts are not sized to allow the passing of a package transfer vehicle bywalking personnel or another vehicle. This can be planned due to low traffic (ten trips a day), slowpackage transfer vehicle speeds (5 to 10 km/h) and a strictly limited flow of personnel in these drifts.Service personnel or vehicle access can be accomplished from the cosntruction drifts by theinterconnecting drifts joining together the various drifts of the group.Figure 7.4.5B and C waste package transfer drifts• The construction drifts for tyred vehiclesThe main function of these drifts is to allow the circulation of the auxiliary construction and transportvehicles (such as personnel, ground support, liner, emergency vehicles). For the B and C0 wastezones, the muck, concrete and backfill are transported by trucks and use these drifts.In addition, these drifts allow the passage of networks and the supply of fresh air in the constructionzones.These drifts have a concrete or a tar covered roadway installed in them for the circulation of tyredvehicles. A sidewalk is provided for walking personnel. This sidewalk can be driven over to allowemergency vehicles to pass by other vehicles, but the drift width is not sufficient for two-way trafficflow.In the drifts travelled through by vehicles without overhead electric lines (low power electric vehiclesand low or high power diesel vehicles), an air exhaust / smoke removal duct with a large section (8 to9 m 2 ) can be installed.DOSSIER 2005 ARGILE -ARCHITECTURE AND MANAGEMENT OF A GEOLOGICAL DISPOSAL SYSTEM303/495