Page 372 - Trenchless Technology Piping Installation and Inspection

322 Cha pte r Ei g h t

45
40 21 in. 24 in. 27 in.
30 in. 36 in.
Jacking force (ton) 35
30
25
20
15
10
5
0
0 33 66 99 132 165 198 231 264 297 330
Distance (ft)

FIGURE 8.9 Design graph for clayey soil.

50
45 21 in. 24 in. 27 in.
30 in.
36 in.
Jacking force (ton) 40
35
30
25
20
15
10
5
0
0 33 66 99 132 165 198 231 264 297 330
Distance (ft)
FIGURE 8.10 Design graph for sandy soil.

160
21 in. 24 in. 27 in.
140
30 in. 36 in.
120
Jacking force (ton) 100
80
60
40
20
0
0 33 66 99 132 165 198 231 264 297 330
Distance (ft)

FIGURE 8.11 Design graph for clayey gravel soil.