The guided boring machine involves a three-stage process using the Pilot Tube Method or Guided Boring Method of installing small product pipes with an outside diameter of 4 to 24 inch with precision required for gravity water and sewer lines. The maximum lengths of the GBM drive will be impacted by a variety of factors like the soil conditions, pipe size. However the typical bores can reach a length of 350 feet. While the jacking-shaft can be eight by eight feet square or nine feet in diameter.
Directional drilling methods and guided boring techniques are typically used for trenchless installations that involve new cables, ducts and pipelines. The path of the drill can be gradually curved or straight while the drilling head direction is able to be adjusted or altered at any time during a bore tosteer around any obstacles or under railways, rivers and highways.
The guide boring machine is associated with drilling that is usually carried out on pre-excavated launches, reception pits or even from the top of a surface in the way of the setting up the machine so that it drills at a shallow angle into the surface of the ground. In regards to capability and scale, directional drilling and guided boring typically fall between methods associated with impact moling and micro tunneling such as Microtunnelling and Pipejacking.
The terms “directional drilling” and “guided boring” are interchangeable and is often utilized to describe heavier end markets like major highway, canal and river crossings that in most cases cover a long distance.
Stages Of The Process Using The Guided Boring Machine
The very 1st stage of these processes is pilot-tube installation. It involves a slanted-faced rotating head used for steering along with a theodolite specially designed guidance system. The accuracy will be achieved using video surveillance which features an illuminated target positioned at the actual head. The pilot tubes are the installed behind this steering head.
When the steering-head reaches the reception-shaft, an auger tube and reaming head sections are then installed behind these pilot tubes. As each section of the tube and auger are added inside the launch-shaft, one section of the pilot tube will be removed inside the reception-shaft. This process will be repeated until such stage that all the pilot sections are removed.
The last stage of pipe installation involves pipe adaptors that are installed into the last part of the auger casing while the product subsequent pipes thrust into their position, and the auger tubes can now be removed from the area of the reception-shaft.