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Part 75-4D Piles, steel-core piles and micropiles. Static test loadings. TNa micropiles.

Published byGiles Summers Modified over 6 years ago

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Presentation on theme: "Part 75-4D Piles, steel-core piles and micropiles. Static test loadings. TNa micropiles."— Presentation transcript:

1 Part 75-4D Piles, steel-core piles and micropiles Static test loadings TNa micropiles and anchors Test trials in Sundsvall II/2013, modified 11/ (Part 75-4, PP 2007, animation+p/r : compr.) Copyright notice Unauthorised copying of this presentation as whole or in parts in any form or by any means, electronic, photocopying, recording or otherwise, without prior written permision is prohibited. ready

2 s = stotal = (sB + ΔLfree) = (f) load
ks = (time, load) press press press ready s = stotal = (sB + ΔLfree) = (f) load

3 Test Expander Body micropiles Ø 400 mm ks = (time, load)
ΔP= (f) constant load Test Expander Body micropiles Ø 400 mm ks = (time, load) press ready

4 Test TNa micropile Ø 400 mm ks = (time, load)
ΔP= (f) constant load Test TNa micropile Ø 400 mm ks = (time, load) ready

5 ks [mm] Axial pile load ready

6 ks [mm] Axial pile load ready

7 Safety factor Pactual /Pbearing capacity
ks [mm] Safety factor Pactual /Pbearing capacity press ready

8 s = stotal = (sB + ΔLfree) = (f) load
Axial pile load s = stotal = (sB + ΔLfree) = (f) load sB = (f) load [??? ] press ??? s = (f) load ready

9 – assessment from elongations measured during loading tests
Axial pile load Eskaft, Ebody, Epile – assessment from elongations measured during loading tests ready

10 Eskaft, Ebody, Epile [???] Δlfree = (f) load [??? ] press ready

11 ΔP foundation = (f) load [??? ]
Axial pile load ready

12 Test Expander Body micropiles Ø 400 mm
Axial pile load Test Expander Body micropiles Ø 400 mm Axial pile load Axial pile load Test TNa micropile Ø 400 mm Axial pile load % ΔPfoundation, % ΔPskaft (core), % ΔPbody (friction), % ΔPpile tip = (f) load press press ready press

13 Pskaft (core)= (f) load
Ԏ [kg/cm2] Axial pile load Pskaft (core)= (f) load press press ready

14 % ΔPbody (friction)= (f) load
Ԏ [kg/cm2] “steel/soil area” Axial pile load % ΔPbody (friction)= (f) load press press press ready

15 δ [kg/cm2] Ԏ [kg/cm2] Ppile tip = (f) load Axial pile load press press
ready

16 Pskaft (core), Pbody (friction)= (f) sp
press press press ready

17 Pskaft (core), Pbody (friction)= (f) sp
Ԏ [kg/cm2] press ready press sp [mm] press

18 Ppile tip = (f) sp δ [kg/cm2] press press ready sp [mm]

19 SOILEX and TNA earth anchor body
– max skin friction between expansion bags and the soil Skin friction 350 kPa 80 kPa Axial pile load ready

20 Thank You for Your attention!
THE END of Part D Thank You for Your attention! ready

21 Welcome to www.najder.se
ready

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