Page 62 - Handbook GEOTEKNIK_Final_Neat

Ranges of Capacity & Pile Sizes Pile Selection Chart

Type of Piles
PRECAST R.C. PILES SPUN PILES STEEL H-­‐PILES STEEL PIPE PILES BORED PILES MICRO PILES  – indicates that the pile type is
DESIGN CONSIDERATION PRESTRESS CONC. PILES Note :

Displacement Piles Non-Displacement Piles not suitable
< 100KN ∗∗ ? ? ? ? X ?
100 -­‐ 300 √ √ √ ? ? √ √ √ √ √ X √ √ √ - Indicates that the pile type is
SCALE OF LOAD (STRUCTURAL) COMPRESSIVE PER COLUMN 600 -­‐ 1100 √ √ √ √ √ √ √
300 -­‐ 600
suitable
Totally Preformed Piles Driven Cast In-place Piles Bored piles (450mm – 1500mm ) = 600kN – 1000kN 1100 -­‐ 2000 √ √ √ √ √ √ √ ? – Indicates that the use of pile
(a ready-made pile is driven (a tube is driven into Micro piles (150mm – 300mm ) = 100kN – 1200kN 2000 -­‐ 5000 √ √ √ √ √ √ ? type is doubtful unless additional
or jacked into the ground) ground to form void) Flight auger piles (300mm – 500mm ), 300kN – 5000 -­‐ 10000 √ √ √ √ √ √ ? measures taken
1000kN > 10000 ? √ √ √ √ √ ?
D ≤ 5M √ ? √ ? ? √ √ ? √ ? ? √ √ √ ** – shallow foundation is
5 -­‐ 12 m
BEARING TYPES 24 -­‐ 34 m 200x200 RC pile can be
(D = Anticipated Depth of Bearing)
Hollow Solid Concrete Tube Steel Tube MAINLY END -­‐ BEARING 12 -­‐ 24 m √ √ √ √ √ √ √ √ √ √ √ √ √ ? preferred or minimum size
(Small displacement) 34 -­‐ 60 m √ ? √ ? √ √ ? ? √ √ ? √ X ? considered
PARTLY FRICTION + PARTLY END BEARING
Closed ended MAINLY FRICTIONAL √ √ √ √ √ √ ?
tube concreted Closed ended Open ended tube LIMESTONE FORMATION ? ? ? √ ? ? √
Steel Pipe Concrete Spun Pile with tube left in tube extracted while WEATHERED ROCK / SOFT ROCK √ √ √ √ √ √ √
(250mm – (300mm – 800mm ) position 800 – 3000kN concreting (Franki) TYPE OF BEARING LAYER ROCK (RQD > 70%) ? ? ? √ √ √ √
900mm ) 500 – 3500kN 670 – 1500kN DENSE / VERY DENSE SAND √ √ √ √ √ ? √
550 – 4300kN 600 – 2000kN GEOTECHNICAL SOFT SPT < 4 √ √ √ √ √ √ √ √ √ √ √ √ √ √
SPT = 4 -­‐ 15
M. STIFF
Concrete Steel H-piles Treated timber pile COHESIVE SOIL V. STIFF SPT = 15 -­‐ 32 √ √ √ √ √ √ √ √ √ √ √ √ √ √
HARD
SPT > 32
(small displacement) (125mm – 150mm ) LOOSE SPT < 10 √ √ √ √ √ √ √
(200mm x 200mm – 100 – 150kN M. DENSE SPT = 10 -­‐ 30 √ √ √ √ √ √ √ Figure 34: Pile Selection
350mm x 350mm) TYPE OF INTERMEDIATE LAYER COHESIONLESS SOIL DENSE SPT = 38 -­‐ 50 √ √ √ √ √ √ √ Chart
430 – 3080kN (G43A) V. DENSE SPT > 50 √ √ √ √ √ √ √
600 – 3080kN (G50B) SOIL WITH SOME BOULDERS / S < 100 mm √ ? √ ? √ ? √ √ √ √ √ √ √ √
100 -­‐ 1000 mm
COBBLES
Precast R.C. piles Precast prestressed piles 1000 -­‐ 3000 mm ? ? ? ? ? ? √
(200mm x – 200mm to (200mm x 200mm to Figure 33: Ranges of Capacity and Pile Sizes (S = SIZE) > 3000 mm √ ? ? √ ? √ √ ? √ ? ? √ √ √
400mm x 400mm) 400mm x 400mm) Commonly used in JKR GROUND ABOVE PILE CAP √ √ √ √ √ √ √
WATER
BELOW PILE CAP
250 – 1450kN 350 – 1600kN NOISE + VIBRATION = COUNTER MEASURES REQUIRED ? ? ? ? ? √ √
ENVIRONMENT
PREVENTION OF EFFECTS ON ADJOINING STRUCTURES ? ? ? ? ? ? √
46 PUBLIC WORKS DEPARTMENT MALAYSIA GEOTECHNICAL ENGINEERING HANDBOOK 47