Swan-neck (bar)
0- 1012 3
1 2 3 4 5 6 7 8 91011
12Volume (m^3 /0.5 m)
0 0.1 0.2
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
6.5
7
7.5
8
8.5
9
9.5
10
10.5
11
11.5
12
12.516
8
16
19
19
16
2
19
17
21
20
16
22
19
21
16
20
19
16
22
18
19
20
21
50 1 2 3 4 5 6 7 8 91011
12Oversupply (%)
02040 – 10 1
25s
30s
14s
14s
13s
15s
186s
14s
14s
13s
13s
14s
14s
14s
14s
13s
13s
14s
14s
14s
13s
14s
14s
13s
123s0142 3 5 6 7 8 91011
12012 3Extr. Rot. (rev/0.5 m) Extr. Rate (m/min)0 1 2 3 4 5 6 7 8 910
1122s26s^1230s27s29s24s28s35s31s36s36s26s30s22s16s16s15s20s17s17s14s16s15s16s19s– (^101) – 5 0
System Pressure (bar) Boring Rot. (rev/0.5 m) Boring Rate (m/min)
01020304050607080
0 1 2 3 4 5 6 7 8 9
10
11
12
Depth (m)
Rig: CM48
Pile: 04
Date: 07/02/2006
Diameter: 600 mm
Bored length: 12.22 m
Total bored revs:26.0
Nominal volume:3.46 m^3
Placed volume: 4.28 m^3
Av.oversupply: 24%
Boring start: 1:03pm
Boring finish: 1:12pm
Concrete start:
Concrete finish:
1:14pm
1:22pm
Key:
A - auger extension/section
C - waiting for concrete
O - obstruction or hard drilling
B - blockage R - rebore
F - breakdown
Depth (m)
Contract:
SDO126
Pile: 04
Figure 2.32Pile log for CFApile (courtesy Stent Foundations Ltd).