Grouting of 2 skidmounted ARIEL compressors with Chockfast Red

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Grouting of 2 skid-mounted ARIEL compressors with
Chockfast Red Red SG
Location Gronau Epe Germany Client
Essent The Netherlands Producer
of electricity Purpose Injection of gas
into salt voids at 2 kms depth at
240 bar
By Tom Hoekstra
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Set up
6 cyl. Ariel compressor
Schorch E-motor
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Anchor calculations

• Before grouting the achorbols following data need
  to be checked or re-calculated
• Required Bolt Force (kN)
• Bolt size
• Bolt length
• Pocketsize
• Planned torque (Nm)
• Groutlength
• Stretch-length

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Preparation grouting of the anchors

• The anchors are checked on
• Taped-in proper stretch-length
• Ring and (1 or 2 nuts)
• Anchor position in centre of hole
• and
• Clean and dry pockets
• Armaflex tube around jackbolts

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Install expansion joint rubber

• Expansion joints create restricted areas in
  order to limit the flow of the grout
• Potlife (temperature) versus flowdistance will
  indicate the placement of the expansion joints
• To avoid shrinkage-cracks after the heatsink,
  joints are placed as a rule every 75-100 cm

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Install shuttering
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Some technical data - for 1 skid

• Total area to be grouted 9800 x 3430 mm
• Clearance 50 mm
• pouring hight (overpour) 80 mm
• Total quantity of Chockfast Red 54 units
• Anchordata (mms)
• 18 pcs
• M 30 x 3.5 class 8.8 L 500
• F 200 kN
• Pocket ?200 x 200 x 375
• L stretch 140
• L grout 300
• Actual elongation ? l 0.242
• Torque 1200 Nm

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Grouting the skid under the compressor

• The segment under the compressor could be
  reached properly by using several spiro tubes of
  Ø 125 with funnels, this enabled us to pour from
  the inside as well.

This access made it possible to use the regular
Chockfast Red
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Grouting the skid under the e-motor

• In contrast with the compressor part
• the area under the E-motor could not be reached
  (no man-holes were available in the skid)
• Consequently all grout had to pass through a
  slot of 50 x 1000 mm.
• consequently Chockfast Red SG was applied

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Reduction on material use

• Tight shuttering close to the contour of the
  skid avoided unnecessary coverage of floor

Red line indicates contours of shuttering
A reduction of 1000 kg grout was obtained The
total floorarea was coated afterwards with a
non-static coating
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Pictures of end result
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End result