1 A steel pile (H-section; HP 360 x 152; see Table 11.1) is driven into a layer of sandstone. The length of the pile is 18.9 m. Following are the properties of the sandstone: unconfined compression strength = qulab) = 78.7 MN/m² and angle of friction = 36°. Using a factor of safety of 3, estimate the allowable point load that can be carried by the pile. Use [qu(design) = qu(lab)/5].
1 A steel pile (H-section; HP 360 x 152; see Table 11.1) is driven into a layer of sandstone. The length of the pile is 18.9 m. Following are the properties of the sandstone: unconfined compression strength = qulab) = 78.7 MN/m² and angle of friction = 36°. Using a factor of safety of 3, estimate the allowable point load that can be carried by the pile. Use [qu(design) = qu(lab)/5].
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Please answer 11.11
![11.11 A steel pile (H-section; HP 360 × 152; see Table 11.1) is driven into a layer of
sandstone. The length of the pile is 18.9 m. Following are the properties of the
sandstone: unconfined compression strength = qmdab) = 78.7 MN/m² and angle of
friction = 36°. Using a factor of safety of 3, estimate the allowable point load that
can be carried by the pile. Use [qu(design) = qu(lab)/5].](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5f631ff8-b743-4a9d-bc17-a25a480dae63%2F468fb150-aad8-4788-a81d-95b9ab7b70bb%2F6qww8ug_processed.png&w=3840&q=75)
Transcribed Image Text:11.11 A steel pile (H-section; HP 360 × 152; see Table 11.1) is driven into a layer of
sandstone. The length of the pile is 18.9 m. Following are the properties of the
sandstone: unconfined compression strength = qmdab) = 78.7 MN/m² and angle of
friction = 36°. Using a factor of safety of 3, estimate the allowable point load that
can be carried by the pile. Use [qu(design) = qu(lab)/5].
Transcribed Image Text:Table 11.1 Common H-Pile Sections used in the United States
Moment of
inertia
Designation,
size (mm) x
weight (kg/m)
Flange and web
thickness w
(m* x 10-6)
Depth d,
(mm)
Flange width d
(mm)
Section area
(m? x 10-9)
(mm)
49.4
123
НР 200 х 53
204
6.84
11.3
207
16.8
НР 250 х 85
X 62
НР 310 х 125
x 110
x 93
x 79
НР 330 х 149
x 129
x 109
x 89
НР 360 х 174
x 152
X 132
x 108
254
10.8
14.4
260
42
246
8.0
10.6
256
87.5
24
312
15.9
17.5
312
271
89
308
14.1
15.49
310
237
77.5
303
11.9
13.1
308
197
63.7
299
10.0
11.05
306
164
62.9
334
19.0
19.45
335
370
123
329
16.5
16.9
333
314
104
324
13.9
14.5
330
263
86
319
11.3
11.7
328
210
69
361
22.2
20.45
378
508
184
356
19.4
17.91
376
437
158
16.8
136
373
371
351
15.62
374
346
13.8
12.82
303
109
---X
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