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Reinforcement drilling with W100, Stockholm, Sweden


Project Description:

In order to meet the demands from the contractor, Golder Associates AB,  sub-contractor PEAB was looking for new drilling technology to reinforce the unique Banco  building in Old Town, Stockholm.  A total of 400 holes were to be drilled with casing.  New piles are then driven down in the cased holes. Pneumatic drilling was ruled out due to danger of damaging the building. Drilling with top hammer or water hammer were the only alternatives.


Result:

After test drilling with Wassara with good results it was decided to introduce the Wassara technology in parallel with traditional top hammer drilling. Towards the end of the project the conclusion was that drilling with Wassara was 2-3 times more efficient compared to top hammer drilling.
 

Equipment:

Hammer

Wassara W100

 

Bit

Ring bit

 

Pump

WASP

 

Drilling fluid

Clean water

 

Drill pipe

1000mmx89mm, pipe thickness 6,3 mm

 

Rig

Comacchio, rebuilt by Geomek

 

Formation

Old wood piles, old filling material, clay

 


Project Description:

In order to meet the demands from the contractor, Golder Associates AB,  sub-contractor PEAB was looking for new drilling technology to reinforce the unique Banco  building in Old Town, Stockholm.  A total of 400 holes were to be drilled with casing.  New piles are then driven down in the cased holes. Pneumatic drilling was ruled out due to danger of damaging the building. Drilling with top hammer or water hammer were the only alternatives.


Result:

After test drilling with Wassara with good results it was decided to introduce the Wassara technology in parallel with traditional top hammer drilling. Towards the end of the project the conclusion was that drilling with Wassara was 2-3 times more efficient compared to top hammer drilling.
 

Equipment:

Hammer

Wassara W100

 

Bit

Ring bit

 

Pump

WASP

 

Drilling fluid

Clean water

 

Drill pipe

1000mmx89mm, pipe thickness 6,3 mm

 

Rig

Comacchio, rebuilt by Geomek

 

Formation

Old wood piles, old filling material, clay