Large diameter Bored Pile
Slurry Wall
Diaphragm Pile
CFA Pile
Root Pilles
Jet Grouting
Environmental Geotechnics
Soil improvement
Cutter Soil Mixing
Hydromill
Tiebacks
Massive treatment
Static load tests
Pt
Rock or soil mass treatment for tunnel excavation
The construction of underground works, especially in urban areas, in medium and large cities, has been adopted as a solution
to the problems of population density and competition for land use. Brazilian tunnel engineering has had an enormous development
over the past 10 years, notably the NATM method (New Austrian Tunneling Method), excavations by biased and shotcrete lining
associated with crankshaft and welded wire mesh.
Rock or soil mass treatment is any service that aims to stabilize the soil to prevent disruptions, reduce the allowable values
and the deformations of the mass repressions during the excavation or depending on the density of the soft soil and give sealing
as the massive, reducing its permeability and the hydrodynamic pressure. There are various methods of soil treatment, however we
have directed the work to develop and implement the following ones:
- Soil-cement columns molded "in situ" by the technology of Jet Grouting;
- Deep sub-horizontal drains (DHP's);
- Structuring the mass by rigid inclusions;
- Needling of the excavation front.
Execution methodology
