PROJECT REVIEW

Since Trenchless Advisor's conception it has contributed and assisted in a wide variety of Trenchless projects both for clients and contractors. Here we would like to share some of these stories with you.

HDD Tackles Environmentally Sensative Area

Highly sensitive SEP 14 swamp which required the installation of a 355mm PE pipe below its surface. Sub-ground conditions included silt, wet sands and gravels/cobble which over the distance of the bore varied considerably in depth. Project was designed and monitored by Trenchless Advisor which ended up as an extremely successful project.

Eire Contractors engaged Trenchless Advisor after being recommended by a Government Authority as an expert in the field of Trenchless. “We engaged them right from the start and their advice, knowledge and dedication proved the secret to a successful crossing” said Tom Kelliher owner or Eire Contractors.

Failed Water Main & Bridge

A bridge sustained serious damage from a past flood which also supported the only fresh water pipeline into a town. A quick, suitable and long term solution was sort through using HDD to drilling under the creek and installing a  250mm pipe which was connect to the existing pipeline. From initial investigation to completed constructed in a very short time frame.

Rail Crossing - 1

One of the many Rail projects undertaken by Trenchless Advisor. The installation of a new 11kV feeder under a main rail line  which will allow for the removal of overhead power line and poles. Three bores varying between 120 to 140 metres long incorporating four EL conduits each in two bores and two EL conduits in a third bore. All three bores also included two grouting conduits to allow for grouting of the borehole once the conduits were in place.

Rail Crossing - 2

Trenchless Advisor was contracted to provide a Trenchless Feasibility and Concept Design report for the proposed crossing of a rail corridor and assist in the submission process to the Rail authority for approval of the design prior to engaging a contractor to undertake the works. 

The client proposed crossing under the Rail corridor was to include one underbore with 4 x Ø140mm conduits and 2 x Ø63mm conduits. One conduit will house the initial installation of a 240sqmm, 3 core copper, 11kV underground cable and the others will remain spares for possible future works and in case of emergency repair. The feasibility and concept design report need to achieve rail approval had to take into account the recent Geotechnical investigation results, predicted settlement data, existing utilities, risks and impacts, construction method and technical specifications along with the current Rail, clients and Australian Standards. Additional investigation also had to be undertaken to assess the electrolysis from stray currents and vibration respectively as well as a track monitoring plan.

A detailed bore plan had to be compiled and drawn as a long section showing all required parameters including depth, entry and exit locations and angles, clearances from rail line and structures, geotechnical information as well as other detailed information. The project successfully reached an “agreed in principle” by the rail authority within a short period of time and was then put out for tender to the market. The success Trenchless contractor completed the project within the required timeframe with no incidents. Track monitoring of the rail confirmed the control targets remained stable for the duration of the under bore.