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 GMT - Excavation of the EBS - Removal of Sand/Bentonite
 
 » Excavation of the EBS
 Overview
 Depressurisation of Cavern
 Cutting of Concrete Plug
 Removal of Backfill
 Investigations of Layer 12
 Removal of Sand/Bentonite
 Investigations of Layers 8 & 7
 Removal of Layers 6 & 5
 Restoration of GMT site
  < Back to GMT Page
Home > GMT Project > Excavation of the EBS
Gas Migration in EBS and Geosphere (GMT)
Excavation of the EBS - Removal of sand/bentonite by layers to top of
concrete silo

The upper most layers of the sand bentonite were very carefully excavated to minimise the potential disturbance of the silo, to avoid damage of the instrumentation and to preserve any structural alteration of the layers below which may have arisen from the water and gas injection.

 




Excavation pattern for the GMT


Ingo Blechschmidt (Nagra) carefully removes the sand/bentonite from layer 9

 

  
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