7. Grouting Works: Initial Works
Injektionsserie
Dichtinjektion Versalstollen II
Injektionsschema A
Dichtinjektion Versalstollen II
Injektionsschema B
8. Grouting Works: Initial Works
Wash Out Effects of Invert Mortar
Wash Out Effects of Pea Gravel
Sealing of Joints
The completion of initial works is a demand to start rock mass grouting !
11. Grouting Works: Rock Mass Grouting
• Water Pressure Relief before and after the grouting works
12. Grouting Works: Rock Mass Grouting
Grouting Criteria:
àPmax : 10 bar (above actual ground water pressure)
àVmax : 1000 l per 3 m borehole
àTotal Amount: 565‘000 l for 600 m tunnel section
(cement based grout mixes)