MICROTUNNELING
SHAFT CONSTRUCTION
The Tunneling Company can assess, design, and construct shafts for temporary and permanent works solutions. These shafts complement our tunneling and trenchless services, and can also be used to provide larger-diameter tank solutions.
TCC’s versatile team and fleet allow us to combine different shaft installation methodologies, providing the most cost effective solution for our clients.
CAPABILITIES
Our capabilities range from temporary shafts to large-diameter storage permanent works. The method of installation and excavation is determined by project-specific geotechnical conditions.
Our expert crews and versatile equipment allow us to install shafts with internal diameters ranging from 1.2 m to 30 m, working within small site boundaries and rights of way when required. We can install shafts at any depth, as permitted by the type of soil or rock encountered. Even when encountering challenging ground conditions, we can undertake shaft sinking beneath the water table by using a wide variety of techniques and methodologies.
We pride ourselves on our adaptable approach which allows us to work across a variety of industries, including civil infrastructure, municipal construction, and oil & gas.
METHODOLOGIES
1. Segmental Caisson (Jacked & Underpinning Solutions)
- Jacked Segmental Caissons are installed using pre-engineered, precast elements. A jacking system provides our experts in the field with the ability to control the installation according to project specifications and tolerances. These caissons can provide an additional element of safety, as they are generally constructed from the surface.
2. Underpinning
- Underpinning is a method of caisson installation that is generally utilized in ground conditions with a longer stand up time. This longer stand up time is necessary to provide crews with substantial periods of time to install the required supports.
3. Cast Insitu Caisson
- These concrete caissons are cast in their installation location. The concrete is poured into an onsite framework, ensuring it achieves the desired dimensions and specifications. Cast Insitu Caissons can be installed as permanent or temporary work solutions.
4. Sheet Piles
- Sheet piles are light-weight, reusable, and sturdy, making them very effective at retaining earth or water. Prior to proceeding with trenchless work on tunneling projects, our in-house experts can install driven and pitched sheet piles to provide a temporary work shaft solution.
5. Secant Piles
- Secant piles are used for ground and water retention prior to an augering or tunneling project. These concrete piles are bored and driven into the ground in an interlocking pattern, and require less excavation space.
SHAFT CONSTRUCTION IN THE FIELD
