The main fields for TERRASOL activities are the following:
Highways and railways infrastructures - Bridges, structures, buildings and industrial installations -
Underground structures - Major earthworks - Large excavations - Maritime and waterways structures

Highways and railways infrastructures
TERRASOL works in co-operation with project management teams or contractors for the study and works supervision of large infrastructures, including soil treatment, cut slopes, embankments on compressible soils and civil works foundations.


A43 Highway

Bridges, structures, buildings and industrial installations
Foundation projects for major structures, sometimes of exceptional dimensions, which need stability analyses (ULS computation) and deformation analyses (SLS computation). TERRASOL can contribute its understanding of the ever-present soil-structure interaction nechanisms and offer optimised solutions, for example with reinforcement by rigid inclusions. Dynamics analyses and liquefaction studies are at times included.


Millau viaduct - Photo : Daniel Jamme

Underground structures
Tunnel projects comprise many factors - of which geology is key - and cannot be designed without a sound grasp of execution methods, soil-structure interaction mechanisms and evaluation of the induced deformations, notably for projects in soils and soft rocks and in an urban environment. In this context, TERRASOL offers its global project philosophy in a multi-disciplinary approach. It is also an area that often calls for more recent techniques (for example, soil treatment and reinforcement) and therefore for novel approaches such as stability and deformations of the tunnel face - a TERRASOL speciality.


Tartaiguille Tunnel - Photo : Softing Communication - Stéphane Duclos

Major earthworks
A key domain for major projects in soft soil areas or on unstable slopes. TERRASOL offers its competency in slope stability analysis methods and settlement analysis. Special techniques for improving or reinforcing the soils can often lead to original and economic solutions.

  
East european Highspeed Railway

Large excavations
Underground infrastructures combining retaining structures techniques, sometimes playing a supporting role, and soil-structure interaction mechanisms, where TERRASOL has developed specific know-how. In addition, soil reinforcement techniques are often needed, not to mention the hydrogeological aspects.


Sangatte shaft (Transmanche Link) - Photo : Solétanche-Bachy

Maritime and waterways structures
These projects more often than not combine retaining structures, shallow or deep foundations and earthworks, generally on difficult ground. TERRASOL is able to analyse the complex soil-structure interaction mechanisms as well as water seepage, one of the fundamental aspects of these structures.


Harbour "Port 2000" (Le Havre) - Photo : Patrice LEFEBVRE