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Dubai's deep tunnel storm water system on track

TBM deep tunnel storm water system in Dubai

The construction of a deep tunnel storm water system in Dubai is currently on track.

The project, being undertaken by a PORR-Six Construct JV, will collect and convey groundwater and storm water runoff from 135 km² of Dubai World Central area and 245 km² of the surrounding area.

Two earth pressure balanced tunnel boring machines  (EPB TBMs) will excavate a 10km tunnel with a boring diameter of 11.05m - the biggest TBMs ever used in the United Arab Emirates. 

Following successful factory testing by PORR, the two assembled TBMs manufactured by the China Railway Engineering Equipment Group (CREG) will arrive on site in October.

TBM deep tunnel storm water system in Dubai

TBM deep tunnel storm water system in Dubai

The joint venture was awarded the tunnel contract by Dubai Municipality on 1 October 2017 and it placed orders for two EPB TBM’s with CREG in November last year.

Porr deep tunnel storm water system project director Christoph Duempelmann said: “The PORR-Six Construct Joint Venture and CREG have been working very hard to meet the tight schedule till date.

“To finalise negotiations for such long-lead key equipment, and then design and manufacture two completely new TBMs of this scale in only nine months is extremely challenging, and was only achieved due to the great commitment of all parties, the joint venture including PORR technical head office team, the TBM manufacturer, the designer, the project management consultant and Dubai Municipality”.

When complete, the tunnel will tackle both rainwater and groundwater, and will drain almost 40% of the entire urban area of Dubai.

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