Summary of PDA Test Result Purpose of PDA Test (see Attachment #3 for reference) : Obtain Pile Capacity RMX ( max. resistance of pile capacity) Obtain Data of Pile Integrity BTA (pile damaged integrity) Equipment Efficiency EMX (energy transfer from equipment hammer) Complete report of PDA Test result will be submitted by Contractor Conclusion from PDA Test (see Table. 1 for reference) : All the test piles ratio is higher than one (1) except TPL‐02 which have SF = 2.5 Therefore to obtain all piles ratio higher than one (1), during pile driving Contractor will use SF > 3, which means that for Dynamic Formula (ENR) the minimum requirement for Pu is : ‐ Pu = 3 x 750 kN = 2250 kN (for pile Diameter = 400 mm) ‐ Pu = 3 x 1550 kN = 4650 kN (for pile Diameter = 600 mm) Contractor will conduct PDA Test for piles with SF < 2.5
Table 1 : Comparison of Pile Capacity for Static Formula, Dynamic Formula and Dynamic Test (PDA) Result STATIC FORMULA Pallowable (kN) *
Pile No 1
TPL‐01 TPL‐02 TPL‐03 TPL‐04 TPL‐05 TPL‐06 #19‐E100‐002 #42‐E100‐003
DESIGN CAPACITY (kN) DYNAMIC FORMULA Pultimate (kN) ** s (mm/blow) h (cm)
2
3
1550 1550 750 1550 750 750 1550 1550
9304 3857 2254 8010 3598 2725 7850 3662
Notes : *) **) ***)
Refer to S‐000‐1311‐101‐N, Table 4.5 Refer to S‐000‐3114‐002‐N, Sheet 5 of 10 See attachment #3
4
5
1.1 6 11.2 2.6 1.2 16.4 2.7 8.6
200 200 150 250 250 250 250 250
Dynamic Test (PDA) Result
Remark
SF
Pu (kN) ***
Ratio (> 1)
6 (= 3/2)
7
8 (=7/2)
9
6.00 2.49 3.01 5.17 4.80 3.63 5.06 2.36
2648 1520 1697 2844 1697 1934 3330 3010
1.71 0.98 2.26 1.83 2.26 2.58 2.15 1.94
pass failed pass pass pass pass pass pass
S-000-1311-101-N R. A SHEET 90 / 498
ATTACHMENT #1
Report on Geotechnical Investigation for Pertamina Langit Biru Cilacap Project at Pertamina Refinery Unit-IV, Cilacap, Central Java
PT. Pondasi Kisocon Raya J2867R1 Rev. 2 August 2016
Table 4.5 Recommended Design Loads of Driven and Jacked Pile Foundations
No.
Area
Pile Type
1
Axens
Driven
2
Area-04
Jacked
3
Utility500 and UtilityOM
4 Notes: * **
FOG-01
Pile Diameter (mm) 400 600 400 400
Jacked 600
Jacked
400 600
Borehole
BH-05 BH-08 BH-12 BH-03 BH-10 BH-14 BH-04 BH-03 BH-10 BH-14 BH-04 BH-01, 02, 13, 15
Pile Tip Level (EL-m)
*Permissible Structural Load (kN)
-12.0 to 17.0 -16 15.5 to -20.0
Geotechnical Capacity (kN)
Recommended Design Load (kN)
**Liquefied Condition (Adopting SF = 2.0)
**Static Condition (Adopting SF = 2.5)
Liquefied Condition
Static Condition
750 1,550 750
900 1,720 975
900 1,680 900
750 1,550 750
750 1,550 750
750
900
900
750
750
1,550
1,550
1,550
1,550
1,550
750 1,550
750 1,550
900 1,550
750 1,550
750 1,550
-26 15.5 to -20.0 -26 19.0 to -25.0
Based on Brochures of Pile Suppliers Estimated from Bearing Graphs in Figures M.4 to ML.7 at the expected driving depths
4.10
ATTACHMENT #2
2.
TYPE AND MATERIAL Test piles shall be the same with the permanent piles in terms of material, sizes, installation method, driving criteria and construction tolerance in accordance with S-000-3114-001-N,003-N,004-N,005-N. The type and materials of test pile are classified based on PCWBS area as follows: (1) Driven Pile (Area E000) - Precast prestressed spun concrete pile in accordance with JIS A5335 or Equivalents. Pile size : 400mm and 600mm diameter (2) Jacking Pile (Area A000 & G000) - Precast prestressed spun concrete pile in accordance with JIS A5335 or Equivalents. Pile size : 400mm and 600 mm diameter - In case of no access, bored pile will be used for Area G000. (3) Bored Pile (Area G000) - refer to S-000-3114-004-N (4) Micro Pile (Area J000) - refer to S-000-3114-005-N
Pile termination criteria shall be determined using modified Engineering News Record (ENR) formula (as shown below).
Where: Ru
: ultimate compressive pile bearing capacity (kN)
ef
: hammer efficiency (see Table)
n
: coefficient of restitution (see Table )
Wh
: weight of ram (kN)
Wp
: weight of pile (kN)
H
: ram fall height (cm)
S
: amount of point penetration per blow (cm)
The criterion shown here is tentatively applied to test piles. Based on the pile load test results, criterion will be reviewed and finalized. Other methods such as Wave Equation Analysis can also be applicable for the determination of pile termination criteria with acceptance of CONTRACTOR.
ATTACHMENT #3 TPL‐01
TPL‐02
TPL‐03
TPL‐04
TPL‐05
TPL‐06
E100‐PR‐002‐019 E100‐PR‐003‐042
