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Table 2 Approximate number of sensors installed as part of the FE experiment during the different instrumentation phases

From: Implementation of the full-scale emplacement (FE) experiment at the Mont Terri rock laboratory

Instrumentation

Phase 1 (tunnel far-field)

Phase 2 (tunnel near-field)

Phase 3 (bentonite buffer)

Total

Temperature

480

140

580

1200

RH, TDR, etc.

0

54

119

173

Deformation

80

44

23

147

Total pressure

36

6

30

72

Pore-water pressure

38

27

0

65

Gas composition

0

0

20

20

Total

634

271

772

1677

  1. Not included in this table are the thermal conductivity sensors, the geophysical sensors, the gas sampling lines, the material samples, the plug instrumentation and some fibre-optic systems