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What Is Boring
Pipe boring refers to a technique of underground installation of a new sewer line, which avoids the need for trenching through the property. This method is typically employed when the existing sewer line is either collapsed, requires re-routing, or has a significant sag and cannot be repaired through methods like bursting or relining.
Planning
Before beginning the pipe boring process, the site must be surveyed to determine the best path for the pipeline. The route must be chosen carefully to avoid obstacles, such as buildings, underground utilities, and environmentally sensitive areas. A plan is then developed for the drilling and installation process.
Drilling
The drilling rig is set up at the starting point, and a small pilot hole is drilled using a steerable drill bit. The drill bit is guided by a wireline system that allows the operator to adjust the direction and depth of the hole. The pilot hole is drilled to the length of the pipe or cable run.
Reaming
Once the pilot hole is drilled, a reaming tool is used to enlarge the hole to the desired diameter. The reamer is pulled through the pilot hole while rotating, removing the soil and creating a larger hole. This process is repeated with progressively larger reamers until the hole is large enough for the pipe or cable to be installed.
Installation
After the hole is reamed, the pipe or cable is attached to the drill string and pulled back through the hole to the starting point. The pipe or cable is then connected to the existing infrastructure, and the site is restored to its original condition. The entire process of pipe boring can take several hours or days depending on the length and complexity of the project.