What Does Exit Site Mean?
The exit site is defined as the workspace located at the intended endpoint of drilling, pipe jacking, or microtunnelling operations. The typical exit site consists of a shallow exit pit, pipe fabrication personnel, and equipment used for pipe pullback operations. In horizontal directional drilling, the exit site represents the point where pilot drilling ends. An exit site is also known as a receiving site.
Trenchlesspedia Explains Exit Site
The exit site should not be confused with the exit pit. The exit pit is a shallow excavation for reception of the drill head, while the exit site encompasses the entire workspace at the opposite end of the entry site. During horizontal directional drilling, the pilot bore surfaces at the exit site, signifying the end of pilot drilling. The cutting head is then replaced with a back-reamer at the exit pit and pulled through the pilot bore.
At the exit site, various sections of the product pipe are fabricated and tested in preparation for pullback operations through the enlarged pilot hole. Slings, rollers, and lifting equipment such as booms and cranes are placed at this location to support and facilitate the installation of the pipe section.