GRUNDOMAT soil displacement technique

The pneumatically driven hammers work according to the soil displacement method. When moving forward the spoil is displaced into the surrounding soil. That way a channel is produced into which socketless short or long pipes up to OD 160 made of plastic (PE, PVC or PE-X) or cables can be pulled in. Depending on the type of soil lengths up to 15 m can either be pulled in successively or later. A compressor with 6 - 7 bar operating pressure is required for this. Exact alignment of the machine towards the target is necessary for a high target accuracy. To achieve this, the decisive factor is the 2-stroke principle.

THE 2-STROKE PRINCIPLE

With the proven 2-stroke principle the piston initially strikes the multi-cutter cone which advances in order to produce the bore hole and to destroy any possible obstacles. The casing is imposed with the second strike and pulled in with the pipes attached. Peak resistance and casing friction are separated and alternately easier to overcome. This makes the GRUNDOMAT work dead on target even in stony grounds.
Tracto-Technik Grundomat

GRUNDOMATN: Versatilely applicable

Property service connections - directly from inside the building

Bei Hausanschlüssen für Gas, Wasser, Abwasser, Strom, Breitbandverkabelung (FTTB) können Erdraketen auch direkt aus dem Haus starten. Ein Kopfloch vor der Hausmauer ist nicht mehr erforderlich. Das macht den Einsatz noch wirtschaftlicher, und der Vorgarten wird geschont.

Tracto-Technik Grundomat


GRUNDOMATN with crowned head

Tracto-Technik Grundomat
The crowned head develops ist full efficiency in non-cohesive, stony soils. It expands the bore directly to the full bore diamteter. The sharp cutting crowns force their way into larger stones to fragment them. Due to the small contact surface of the cutting crowns, the highest possible degree of efficiency is achieved with the same amount of striking energy. The spoils are pushed through the openings between the cutting crowns and displaced to the rear. Then the penetration process starts.

GRUNDOMATN with stepped head

Tracto-Technik Grundomat
The proven stepped ghead is universally applicable in any type of soil. At first the chisel tip moves forward “opening” the soil. Then the bore head penetrates the soil step by step at high precision. The displacement process runs off gradually thus guaranteeing high running stability. But nort every type of soil is suitable for the stepped head or the crowned head vice versa. In these cases the bore head can be exchanged without difficulty.



GRUNDOMATN Technical data

GRUNDOMAT Type Bore Dimater
Ø (mm)
Length (mm) Weight (kg) Air consumption (m³) # of strikes
1. gear (min-3)
# of strikes
2. gear (min-3)
Max Pipe OD
max AØ (mm)
45N (2-gear) 45 997 9 0,35 530 635 40
55N (2-gear) 55 1131 15 0,5 470 570 45
65N (2-gear) 65 1290 24 0,8 460 585 50
75N (2-gear) 75 1399 33 0,9 395 480 65
85N (2-gear) 85 1528 46 1,0 360 440 75
95N (2-gear) 95 1762 65 1,4 320 415 85
110N (2-gear) 110 1700 96 1,7 350 410 90
130N (2-gear) 130 1802 117 3,0 370 435 110
130N (Servo) 130 1802 117 3,0 340 - 110
145N (Servo) 145 2033 168 3,4 310 - 125
180N (Servo) 180 2280 260 4,5 280 - 160
Short versions
45NK (1-gear) 45 875 8 0,35 530 - 40
65NK (1-gear) 65 933 16 0,8 600 - 50
75NK (1-gear) 75 1100 24 0,9 496 - 63
95NK (1-gear) 95 1393 50 1,4 390 - 85