Superior Microtunnelling Solutions

When precision is required – our unique microtunnelling technology delivers results.

Bothar provides superior microtunnelling solutions using Bothar Built Fully Steerable Device (FSD) Microtunnelling machines as well as equipment manufactured by world-leader Herrenknecht to complete trenchless installation of pipelines. Our solution uses a remotely-controlled, guided operation that provides continuous support to the excavation face by applying mechanical or fluid pressure to balance groundwater and earth pressures. This slurry-supported excavation process and comprehensive range of AVN systems with specialized cutting heads make it possible to tunnel in all types of ground conditions ranging from slit to clay to incohesive soils, and further to gravel and hard rock. Just one of the reasons we are considered North America’s leading microtunnelling contractors.

What is Microtunnelling?

Microtunnelling is the leading underground construction method used to install new pipelines with minimal surface obstruction and environmental impact. This trenchless construction method requires a small vertical shaft to tunnel under roads, rivers and railways, densely populated urban areas, etc. This method highly reduces ground disturbances and avoids interference with above ground activities including traffic, people, marine life and other surface environments. Microtunnelling is slurry supported, enabling this method to be used in almost all ground conditions from soft, sandy soils to gravel and rock. 

Microtunnelling is used to install pipelines ranging from 600 mm to 4,000 mm over short or extended distances. It is primarily used for utility pipeline installation, water and wastewater system installation, lake and marine intakes and outfalls, and can also be used to install pipelines for proper storm runoff, flood mitigation and redundant power systems to ensure coverage.

Our microtunnelling solution uses Bothar Built Fully Steerable Device (FSD) Microtunnelling machines as well as equipment manufactured by world-leader Herrenknecht to complete trenchless installation of pipelines. Our solution uses a remotely-controlled, guided operation that provides continuous support to the excavation face by applying mechanical or fluid pressure to balance groundwater and earth pressures.

Microtunnelling minimizes public, operational and environmental disruption

Microtunnelling is a discrete construction method making it a viable option for congested urban areas. Requiring two vertical shafts, our microtunnelling contractors are able to complete complex projects without needing to close roads, block access to buildings, disrupt public green spaces or other environmentally sensitive areas. We are one of North America’s few providers of curved alignment tunnelling. This specialized method enables the installation of non-linear pipelines through a single entry rather than drilling multiple shafts along the route. With our extensive microtunnelling experience, they can precisely tunnel around existing buried infrastructure prevalent in urban areas and reduce the project’s overall cost.  

Microtunnelling is a low pressure drilling method and our team monitors ground settlement during the entire tunnel process to ensure the integrity of the surrounding infrastructure and safety of the work site. This approach also reduces frack out risk and leads to clean, non-toxic drilling muds making it a safe method for environmentally sensitive areas. 

Experience our end-to-end microtunnelling contractor solutions

We are experienced in every type of trenchless technology and offer full microtunnelling solutions including project engineering, equipment procurement  and construction management. Our engineers can provide feasibility studies for proposed microtunnelling projects and advise the best methods for the highest likelihood of success. Assessing a route early, our team can help determine the most cost effective approach that reduces disruption to the public and environment, and mitigate any risks the project may encounter. 

As North America’s leading microtunnelling contractors we have experience constructing shafts and installing pipe in a variety of geological conditions and weather extremes. From installing pipe in Canada’s extremely cold north to the high temperatures in the United State’s south, our work sites have the necessary equipment to keep the communities, workers and sites safe and operational. With our experienced team and in-house solutions including shaft construction, direct pipe installation, pipe jacking and auger boring, we are able to complete trenchless crossing projects effectively and efficiently.

Microtunnelling advantages

  • Cost effective drilling method

  • Slurry-supported and adaptive process

  • Significantly reduced environmental impact compared to traditional methods

Planning a microtunnelling project?

Get in touch with expert microtunnelling contractors today.