GRUNDORAM pneumatically driven pipe ramming machines are used for the dynamic installation of steel pipes underneath roads, waterways, railway tracks, parks, etc. over lengths up to 80 m. The TT ramming technology provides thrust forces up to 40.000 Nm, enabling the economic installation of open steel pipe up to 4000 mm diameter in soil classes 1 - 5 (partly even class 6 - easily soluble rock) without jacking abutments.

The steel pipe ramming technique is suitable for installing longitudinally or spirally welded pipes, seamless pipes and pipes with insulation protection as product pipes, e.g. in pipeline construction, or as casing pipes for supply und drainage pipe bundles. The pipe rammers are also used horizontally for constructing underpassees, small outlets, pipe roofs for tunnel structures, for supporting HDD bores (HDD Assist). Vertical applications are foundations, sheet piling or well drilling.

GRUNDORAM technology

The air driven piston inside the machine body strikes against the ramming head. The cinetical impact energy which is released that way enables maximum advancing of the pipe string due the the optimal force transmisision via the cones. As the constant loads affecting the machine require maximum product quality, the one-piece casing (head and casing are one part) is made out of a solid block which is thoroughly galvinzed. The piston is subject to an elaborate hardening process. A tight sealing minimises air consumption. Thus GRUNDORAM stands for durability and reliability.

13 powerful models

The largest ramming machine APOLLO provides an impact energy of 40.500 Nm.

Only 3 main components

The one-piece casing is made out of a solid block which is thoroughly galvinzed. The piston is subject to an elaborate hardening process. A tight sealing minimises air consumption.

Installations lenghts / Pipe diamters / Machine types

GRUNDORAM Accessories

• Lifting cushion(pat.)

  enables exact and simple alignment of the ramming machine behind the steel pipe

• Add-on cones

  guarantee a tight-fitting, stable connection between pipe and ramming machine.

• Soil removal adaptors / cones (pat.)

  ensure a stable connection between pipe and ramming machine thus

• Cotter segments

  enable the production of a butt welding seam, because the pipe is not flared when ramming, thus detachment at the

Leistungsdaten

GRUNDORAM Type	Maschine Ø (mm)	Ø rear cone(mm)	Length (mm)	Installation i Pipe (mm)	Weight (kg)	Air consumption (m³/min)	No. of strokes (min-1)	Impact energy (Nm)	From Pipe DN
David	95	112	1490	-	59	1,2	345	230	50
Atlas	130	145	1453	-	95	2,7	320	420	50
Titan	145	160	1545	-	137	4,0	310	800	100
Olymp	180	195	1690	-	230	4,5	280	890	100
Herkules	216	235	1913	-	368	6,5	340	1440	120
Gigant	270	300	2010	-	615	12,0	310	2860	200
Koloss	350	400	2341	-	1180	20,0	220	6820	280
Goliath	460	510	2852	-	2465	35,0	180	11600	380
Taurus	600	670	3645	-	4800	50,0	180	11600	380
Apollo	800	900	4400	-	11500	100	180	40500	600
Mini-Atlas	125	140	946	250	60	1,7	580	180	50
Mini-Olymp	180	230	1080	450	175	3,5	500	720	100
Mini-Gigant	270	330	1230	450	460	10,0	430	2000	200

Advantages of the technique:

• less disruption and damage of surfaces worth conserving (road surface, front gardens etc.) and minimal restoration – giving economic advantages
• low social costs because detours, half-sided barriers, traffic signal facilities etc. are avoided
• acknowlegded pipe installation technique
• short setting-up times - short installation times
• the dynamic impact when ramming can shatter obstacles and easily overcome difficult starting resistance after standstill periods. The aiming accuracy is improved because the dynamic impact shatters various soil formations within the diameter range and obstacles don’t have to be displaced or pushed aside in one piece
• no jacking abutment, no auger cutter required, which could get jammed
• the soil core remains in the pipe during ramming, i. e. no inrush of water when rivers or high water table areas are undercrossed
• minimal covering, i. e. no large-scale pits
• simple operating technique
• adaptation to all pipe diameters with special ram cones
• wide application range