DSI supplies DYWI® Drill Hollow Bars for new Transportation Corridor in Western Canada

The approx. 40km long South Fraser Perimeter Road (SFPR) is a new four lane road between the towns of Delta and Surrey in Western Canada. The new road provides an efficient transportation corridor for freight traffic while simultaneously relieving traffic congestion on municipal roads in the Greater Vancouver area. The last section of SFPR is scheduled for completion in December 2013.

The construction project also included several retaining walls for slope stabilization. The project was one of the first for which DSI Canada supplied “T” Thread DYWI® Drill Bars. Consequently, extensive testing was necessary in order to confirm the material performance of the DYWI® Drill System. All of these tests were successfully completed.

DSI supplied more than 13,000m of Type T40N/16 DYWI® Drill Hollow Bars and 10,800m of Type R38N DYWI® Drill Hollow Bars with accessories. The hollow bar system proved itself on site due to the following advantages:

  • Simultaneous drill and grout installation for increased bond performance
  • Self-drilling and flexible system
  • Installation into loose or collapsing soils without the need for bore hole casing
  • Flexible length adaptation thanks to fully threaded rod sections

The on time delivery of the DYWI® Drill System was challenging because the design was not completed until shortly before the installation of the systems was required on site. This resulted in extremely short timelines from order placement to installation. In addition, more than one contractor was working on more than one wall at a time. Thanks to its efficient production in Surrey, DSI was able to maintain the extremely tight schedules for all of the structures.


Government of British Columbia, Canada

General Contractor

Fraser Transportation Group (FTG), Canada


Vancouver Shotcrete & Shoring Inc. / Belpacific Excavating & Shoring Limited Partnership, both Canada

Consulting Engineers

Stantec Inc., Canada

DSI Unit

DYWIDAG-Systems International Canada Ltd., Western Division, Canada

DSI Scope

Supply of 13,000m of Type T40N/16 DYWI® Drill Hollow Bars and 10,800m of Type R38N DYWI® Drill Hollow Bars with accessories

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DSI Canada Civil Ltd.

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