Environmental Engineering Reference
In-Depth Information
(a)
Hand trip for
unloading
Barrel
Helic
Clearance
cutter
Shutter
plate
Toothed
cutter
lip
Clearance
cutter
Chopping bit
Rock
bucket
Cutter
Hinged bottom
(b)
Helical
Disc
Cutter
Cutter
Barrel
FIGURE 2.52
(a) Heavy-duty auger machine excavating with a large-diameter barrel bucket. Generally suitable only in soils
with cohesion where the hole remains open without support. (b) Types of large augers. (From USBR,
Earth
Manual
, U.S. Bureau of Reclamation, Denver, Colorado, 1974.)
TABLE 2.14
Standard Sizes of Drill Tools
a
O.D.
I.D.
Weight
Coupling O.D.
Size
in.
mm
in.
mm
lb/ft
kg/m
in.
mm
Drill Rods — Flush Coupled
E
b
1 5/16
33.3
7/8
22.2
2.7
4.0
7/16
11.1
A
b
1 5/8
41.3
1 1/4
28.5
3.7
5.7
9/16
14.3
B
b
1 7/8
47.6
1 1/4
31.7
5.0
7.0
5/8
15.9
N
b
2 3/8
60.3
2
50.8
5.2
7.5
1
29.4
EW
c
1 3/8
34.9
15/16
23.8
3.1
4.7
7/16
11.1
AW
c
1 3/4
44.4
1 1/4
31.8
4.2
6.5
5/8
15.9
BW
c
2 1/8
54.0
1 3/4
44.5
4.3
6.7
3/4
19.3
NW
c
2 5/8
66.7
2 1/4
57.1
5.5
8.4
1 3/8
34.9
HW
c
3 1/2
88.9
3 1/16
77.8
7.7
11.5
2 3/8
60.3
Casing — Flush Jointed
EW
1 13/16
43.0
1 1/2
38.1
2.76
4.2
AW
2 1/4
57.2
1 29/32
48.4
3.80
5.8
BW
2 7/8
73.9
2 3/8
60.3
7.00
10.6
NW
3 1/2
88.9
3
76.2
8.69
13.2
HW
4 1/2
114.3
4
101.6
11.35
16.9
PW
5 1/2
139.7
4 7/8
127.0
15.35
22.8
SW
6 7/8
168.3
6 1/32
152.4
19.49
29.0
UW
7 5/8
193.7
7
177.8
23.47
34.9
ZW
8 5/8
219.1
8 3/32
203.2
27.80
41.4
(
Continued
)
