Solutions
Tunnelling
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When constructing starter pits Keller's range of grouting systems are frequently used. Soilcrete can be used to form a firm impermeable block of ground which is subsequently readily excavated. Alternatively, a ring of interlocking Soilcrete columns or contiguous piles can form the perimeter of shafts.
Where major road or rail tunnels pass beneath structures soilfrac compensation grouting can be used to re-level the buildings by way of stiff grout injection above the tunnel route. In granular soils,compaction grouting can be used to arrest potential settlements.
In areas of soft ground a commom problem is the support of major sewers and dry soil mixing has been used to treat organic or very soft clays.
