Jack and bore is a method of horizontal boring sewer construction. Construction crews drill a hole underground horizontally between two points without disturbing the surface between sending and receiving pits. The tool works in a way very similar to a jack hammer and uses air to pound its way through the ground. These are the basic steps of jack and bore construction:
- Dig sending and receiving pits to the required depth.
- Shore the walls if needed.
- Lay a boring machine in the pit.
- Set up tracks and insert an auger in a casing.
- The boring machine pushes the auger and casing through the ground simultaneously while the machine turns a cutting head through the ground.
- The auger carries the debris back to the machine in the pit.
- Dirt and debris are shoveled out of the pit.
What to Expect During Jack and Bore
- The equipment is loud and causes vibration that you may feel in your home or business. This is standard for this method of construction.
- Both preparation and post-jack and bore work can take a few weeks to complete.
- There may be road closures and lane restrictions.
- There may be inactivity between some phases of this process.
- Typical work hours are 7:00 a.m. to 6:00 p.m. Monday through Friday, but the contractor may schedule work during the same hours on Saturdays.