1. Part 75-2A
Piles, steel-core piles and micropiles Static test loadings II/2013, modified 11/ (Part 75-2, PP 2007, animation+p/r : compr.)
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2. Steel-core piles for underpinning (replacement pile, grouted in-situ, permanent casing required)
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3. Rapport 97
End-bearing or end-bearing and by friction along the shaft within rock socket (alt. in soil along drill casing)
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4. Casing is left in the ground
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Steel-core piles
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Rapport 97

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Rapport 97

7. Ring bit and integrated casing shoe for the Down-The Hole-Hammer (DTH)
Percussed none rotating casing with button bits with inserted the Down-The Hole-Hammer (DTH)
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Ring bit and integrated casing shoe for the Down-The Hole-Hammer (DTH)
Percussed none rotating casing with button bits
Drilling with Robit method in soil
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8. Robit DTH drilling for steel-core piles at Torsgränd in Stockholm
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9. Steel-core piles at Torsgränd in Stockholm
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10. Overloading of piles due to uneven load distribution under settlement process
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11. P1 = P2 = P3 P1÷3 Lfree_1,2,3 s = (f) actual load s = (f) actual load
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12. P1,3 >P2 P2 P1,3 Lfree_1,3 Lfree_2 s = (f) actual load
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13. Water- and dry air flush in the same ground conditions
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14. Steel-core piles. Stage 1: drilling in soil
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15. Stage 2: drilling in rock
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16. Robit DTH drilling for steel-core piles through sand layer
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Robit DTH drilling for steel-core piles through clayely sand layer close to the rock surface
Robit DTH drilling for steel-core piles through sand layer
Robit DTH drilling for steel-core piles through cement grouted rock fill
Robit DTH drilling for steel-core piles in the rock

17. A record of the driller’s observations on progress of drilling, rate of penetration, speed and uniformity of rotation of bit, action of the drill rig such as jerky, smooth, rough, steady etc.
Length of each core run and the length, percentage or both of core recovered along with location and cause of core loss (core drilling only).
Any changes in the character of the drilling water or mud, and in case the drilling water disappears, the elevation or depth where this happened.
The driller’s interpretation and description of the nature of the formation(s) encountered in the drilling.
Location and nature of cavities, seams, cracks, whether filled or open, soft or fractured rock and any other relevant information in connection with the purpose of the exploratory drilling.
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18. Robit DTH after drilling with air flush
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Robit DTH after drilling with air flush
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19. Thank You for Your attention!
THE END of Part 75-2A
Thank You for Your attention!
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20. Welcome to www.najder.se
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