Page 21 - Trenchless Technology Piping Installation and Inspection

xx New Dev e l o p m e n t s

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FIGURE 1 AXIS Vacuum Boring System. (Source: Ariaratnam et al., 2010.)

Sight/Relief Hole Sight/Relief Hole

Pilot Bore Hole Back-Reamer Drilling Fluid - Soil Slurry Tow Head New Pipe
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FIGURE 2 ArrowBore . (Source: Trenchless Flowline.)

Boring unit Laser plane Grade pole with
Distance = Constant
tracker

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FIGURE 3 Ditch Witch Grade Drilling Method . (Source: Gunsaulis and Levings, 2008.)