Services

Auger Bore / Jack & Bore

Auger boring involves jacking a steel casing horizontally from a launch pit to a retrieval pit while removing material through a rotating auger. This method can handle soil or rock and is widely used for its cost-effectiveness.

However, accuracy is a known limitation. An enhanced version of this method is the guided bore or pilot tube guided bore, which improves alignment control.

Pipe Jacking / Conventional Tunneling

This method uses hydraulic jacks to push steel casing or specially designed pipe behind a tunnel boring machine (TBM), which excavates material at the tunnel face.

Unlike auger boring, this method allows for mid-tunnel alignment adjustments, making it ideal for longer distances or challenging ground conditions.

Guided Auger Bore

Guided auger boring is a more precise variation of the traditional auger bore method. It uses a pilot tube—similar to directional drilling—to establish an accurate path from launch to retrieval pit. Once in place, casing and augers follow the pilot tube’s path, improving line and grade control throughout the bore.

Knowing where the pilot tube enters the retrieval pit ensures exact casing placement.

Sliplining

Sliplining is a cost-effective pipeline rehabilitation method. It involves inserting a new “carrier” pipe into an existing “host” pipe, leveraging the host’s alignment and structure. This technique reduces installation time, lowers costs compared to open-trench methods, and preserves underground space for future utilities.

Pipe Ramming

Pipe ramming is a trenchless method ideal for short bores and tough ground conditions where auger boring may not be suitable—excluding solid rock. It uses a pneumatic hammer to drive steel casing through the earth. While not steerable, this method handles boulders and cobbles effectively without damage.

Hand Mining

Hand mining is a traditional, labor-intensive tunneling method used for short runs or when removing obstructions. It requires tunnels large enough for worker entry and a protective shield overhead to ensure safety.

Shaft Excavation

Our team is experienced with a variety of shaft excavation and ground support methods, including liner plates, ring beams and lagging, sheet piles, and more. Each method is suited to specific soil conditions, depths, and proximity to existing utilities.