Asas: Ujian Beban 1. Maintaned Load Test i. Contoh ... - Nzmctc.com

Asas: Ujian Beban
i. Contoh Pengiraan
1. Maintaned Load Test
○ Beban kerja= 50 tan
○ Beban ujian= 2 x beban kerja
= 2 x 50 = 100 ton
○ Increament untuk menaikkan beban = 100/8 = 12.5 ton
○ Increament untuk menurunkan beban
ton
= 100/4 = 425
○ Berat pemberat (kentledge) = 100 + 20%
= 120 ton

PROCEDURES
1 st Cycle – up to Working Load
25% of working load for each increment
Maintained minimum 2 hours at each increment
Maintained 24 hours at Working Load.
Reading is taken at 15 minutes interval
Reading of pile settlement is taken before and
after increment
Unloading at 4 equal stages @ 1 hour interval.

PROCEDURES
2 nd Cycle – up to Twice Working Load
25% of working load for each increment
Up to 2 x working load (8 increments)
Maintained minimum 2 hours at each increment ATAU
rate of settlement 0.05mm in 15 minutes is reached.
Maintained 24 hours at 2 times Working Load.
Reading is taken at 15 minutes interval
Reading of pile settlement is taken before and after
increment
Unloading at 4 equal stages @ 1 hour interval.
Wait 1 hour after zero load to record residual settlement
Plot load/time graph and load settlement graph.

Pile Testing-STATIC LOAD TEST
(Cont.)
JKR STANDARD SPECIFICATION FOR
BUILDING WORKS 2005
Acceptance Criteria for Static Load Test
1. At design load – s< 12.5mm or,
2. At test load – s < 38mm or 10% pile diameter
(which is higher), or
3. Residual settlement

0
-5
-10
-15
-20
-25
-30
-35
-40
LOAD Vs SETTLEM ENT CURVE
LOAD (TONNE)
0 25 50 75 100 125 150 175 200 225

WHAT CAN GO WRONG?
•Coaxial loading
•Bearing for the kentledge
•Spacing & rigidity of the reference beam supports
•Compliance with STD & Spec (layout & measurement
devise)?

INSTRUMENTED
BORE PILE