TERRA-JACK 125 lays house connection for gas

TJA in der Startgrube, TERRA-JACK installed in pit© TERRA AG, Reiden, Switzerland
IMD Infrastrukturanlagen und Montagdienstleistung GmbH is a contractor for infrastructure underground pipe and cable networks. They operate all over Germany. As a partner of the Stadtwerke Krefeld they use the TERRA-JACK 125 for trenchless directional rod pushing for house connections. The TERRA-JACK 125 closes the gap between underground piercing tools (moles) and HDD machines. It is ideal for narrow space within cities. For this pipe laying project in Krefeld a HDPE pipe OD 50 mm (2”) was laid over a length of 23 m (75 ft). The new pipe had to be laid parallel to an existing water line, it crossed two telecom cables in the pavement. The pilot bore was done precise and fast by exact steering and safe locating. The new pipe was pulled in rapidly with an expander cone Ø 75 mm (3”). This trenchless method protected the garden and the surface of the road. The working pit is prepared. The 4 m (13 ft) long safety mat protects the operator from electrical strikes, even if he touches the pit wall. The TERRA-JACK 125 is installed in the working pit. A temporary seat is installed at its left end. This house connection was laid trenchless over a length of 23 m (75 ft). The electro hydraulic valve with cable remote control and hydraulic houses is installed. The remote control operates the TERRA-JACK. The locating system Digitrak F2 locates the pilot bore. The receiver is placed over the drill trace. The monitor (display) of the locating system Digitrak F2 shows the operator at the TERRA-JACK the exact path of the pilot bore. The HDPE pipe OD 50 mm (2“) is prepared for the pipe pulling. The expander star and the expander cone Ø 75 mm (3”) are assembled. The new HDPE pipe OD 50 mm (2“) is pulled in. The house connection can be connected.
Elektrowegeventil, electro hydraulic valve © TERRA AG, Reiden, Switzerland
Hausanschluss 23 m, house connection© TERRA AG, Reiden, Switzerland
Horizontalbohranlage, HDD machine © TERRA AG, Reiden, Switzerland

Monitor des Ortungssystems, monitor locating system© TERRA AG, Reiden, Switzerland
Orten der Pilotbohrung, locates the pilot bore© TERRA AG, Reiden, Switzerland
Aufweitstern, expander star © TERRA AG, Reiden, Switzerland


TERRA AG für Tiefbautechnik - Hauptstrasse 92 - 6260 Reiden - Schweiz - Tel. +41 62 749 10 10 - office@terra-eu.eu