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Ground Anchor Systems
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Hollow Bar Anchor Installation Equipment
Geo-Drill
Information		 Parts &
Accessories		 Geo-Drill
Installation		 Case
Histories		 Corrosion
Protection
Drill Rigs Grout-Swiverl System
Junction Bar Coupling Adaptor
Drill Rigs

The preferred method of installation for the Williams Geo-Drill Injection Anchor System is rotary percussion drilling, as this method offers good directional stability and high rates of production. Hand-held drill rigs can be used to install 32 mm (1-1/4”) bars. Hand-held equipment works best when used in conjunction with a jackleg or within a slideframe arrangement. (Click drawing for larger view)
Drill Rig
Grout-Swivel System for Rig Installation
Grout ShankGrout Shank for Grout Swivel System For simultaneous drilling and grouting installations a grout-swivel system is required. The grout-swivel consists of a Grout Body and Grout Shank. The Grout Shank fits within the Grout Body and contains grout inlet ports. One end of the shank attaches to the striker bar while the other end attaches to the hollow bar anchor. The Grout Body contains an inlet pipe to allow grout to enter into the shank and down the hollow bar. The body remains stationary while the shank spins with the rotary action of the drill. To hold the body into position and prevent spinning with the rotary action of the drill, it is necessary to attach a locator frame from the body to the drifter.
Caution should be applied that only water or grout flush be used with the grout-swivel system. In all cases, grease should be applied to the grout-swivel system prior to use.
Grout Body for Grout Swivel System
Grout Body
Junction Bar
Junction Bar Williams recommends the use of a Junction Bar to transition between the Grout Shank and the Geo-Drill Bar. Coming out the anchor end of the Junction Bar would either be a Geo-Drill Coupling or Coupling Adapter. All disengagement during drilling to add sections or move to another anchor location would be done from below the Junction Bar and not at the Grout Shank, thus prolonging the life of the Grout Swivel.
Coupling Adapter
Coupling Adaptor A Coupling Adapter is a machined and case hardened adapter, which is usually located just below the drill hammer and is used to connect the striker bar to the hollow bar. Sizes are available in any striker bar thread type to connect to any Geo-Drill Bar size. Generally a Coupling Adapter would be used in place of a grout-swivel during an air flush installation.
Williams Form Engineering Corp.
Geo-Drill
Information		 Parts &
Accessories		 Geo-Drill
Installation		 Case
Histories		 Corrosion
Protection
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