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15.02.2017

Hecules-Trevi makes pre-drilling for jet-grouting with water-propelled hammers WAI for the Swedish Ica Stores new Headquarters in Arenastaden, Solna

Approximately 600 holes of Ø115 mm, 4.5’’, were drilled for part of the construction of the Headquarters building. The water-propelled drilling was chosen because of the proximity to the railway with intense traffic, implicating special demands on the ground foundation. For Hercules-Trevi this was just one project among many with the water-propelled drilling technology, since they have very long experience from it being the most suitable in sensitive urban areas. Drilling went on as planned and to customers satisfactory.

Read more: Project Case



14.02.2017

Besab re-inforces the Liljevalchs art gallery in Stockholm with the unique Twin pump and water-propelled technology from GDS

In 2015 Besab started the sensitive ground reinforcement project of the Liljevalchs art gallery building. The work includes drilling casing advancing, RD Ø115 and RD Ø140 drilled steel casing piles for ~400 holes and is planned to end in 2017. The reason for using the water-propelled drilling technology was due to the requirements on work environment, minimization of risk of settlements as well as Besab’s experience of the technology being more cost-efficient.

For this project, the unique 720 Twin diesel pump, giving 720 lit/min @ 190 bar, from GDS was used – a pump uniquely serving two rigs in parallel, resulting in major cost savings.

Read more: Project Case



31.01.2017

Come and discuss the WAI water-propelled drilling technology and other drilling matters with the GDS sister company BWH at VÖBU

Feel welcome to meet our sister company, BWH Bohrwerkzeuge Hoffmann and TDS Tunnel Drilling Solutions, in stand 504 at Geotechnique Days in Austria/Österreichische Geotechniktagung, on Feb 2-3rd, 2017

http://oegt.voebu.at

Willkommen!

25.01.2017

The very first WAI hammer project ! – GDS supplies water-propelled hammers, pumps, drilling equipment and technical support to Implenia for the large Stockholm City Line project

For the construction of the Stockholm City Line’s Connection South Station, pre-drilling for grouting, drilling for underpinning for ground reinforcement as well as drilling for sheet pile walls needed to be realized. For this, GDS supplied water-propelled hammers, threaded casings and pumps as well as casing advancing systems, together with its partners DrillKing, Colcrete Eurodrill and GeoRocFor. Aditionally, GDS  supported with service and scheduled maintenance.

The demands on low-noise-level as well as the surrounding infrastructure consisting of sensible buildings, made the water-propelled method superior as alternative. Also, the water-propelled technology was prescribed by designing engineer Ramböll in the request for tender.

Due to the hectic schedule, the fast deliveries and technical support from GDS made
the project possible to realize within given time frames…

Read more: Project Case



23.01.2017

GDS supplies Züblin with an electric pump, 5’’ WAI-hammer and a fast solution on customized reamer bit design from Drill King for the Boliden-Garpenberg project

For the drilling of a dozen service and media holes reaming in several steps was made; from Ø76 mm (3’’) to 324 mm (12 ¾’’). Due to high requirements on working environment below surface and safety issues when drilling with air, the water-propelled drilling technology was chosen. The reamer bit solution from GDS/Drill King was chosen due to very short delivery time, high quality and possibility to customize reamer bit design.

In addition, Züblin rented an electric pump from GDS, a Kamat K1300-3G, including a frequency converter drive and thanks to this it was possible to adjust pump output to the available grid power supply of only 120 A.

Despite severe geological conditions, the holes were possible to produce keeping the given time plan…

Read more: Project Case



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