A- The load (Q=900 ton) locate at x, determine the max. & min. pile reaction for the given condition shown in figure below. (All dimensions in meter) |0 1.0 1.0 5.0 m to 3.0 3.0 5.0m 3.0 1.0i 1.0' 3.0 O-

A- The load (Q=900 ton) locate at x, determine the max. & min. pile reaction for the given condition shown in figure below. (All dimensions in meter) |0 1.0 1.0 5.0 m to 3.0 3.0 5.0m 3.0 1.0i 1.0' 3.0 O-

Principles of Foundation Engineering (MindTap Course List)

8th Edition

ISBN:9781305081550

Author:Braja M. Das

Publisher:Braja M. Das

Chapter9: Pile Foundations

Section: Chapter Questions

Problem 9.30P

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Pricing Excavation and Backfill

Backfill, in construction, is the activity of returning the soil and gravel that are removed during building construction or using them again to toughen and support the foundation of the building or any other structural component.

Question

A- The load (Q-900 ton) locate at x, determine the max. & min. pile reaction for the given
condition shown in figure below.
(All dimensions in meter)
| 1.41.0
5.0 m
to
3.0
3.0
5.0m
3.0
1.0i 1.0 3.0

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A steel pile (H-section; HP 310 125; see Table 12.1a) is driven into a layer of sandstone. The length of the pile is 25 m. Following are the properties of the sandstone: unconfined compression strength = qu(lab) = 80 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].
A steel pile (H-section; HP 360 1.491; see Table 18.1) 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 = qu(lab) = 78.7 MN/m2 Angle of friction = 36 Using a factor of safety of 3, estimate the allowable point load that can be carried by the pile. Use Eq. (18.42).
Refer to the pile shown in Figure P9.1. Estimate the side resistance Qs by Using Eqs. (9.40) through (9.42). Use K = 1.5 and Coyle and Castello’s method [Eq. (9.44)]
Solve Problem 12.23 using the method of Broms. Assume that the pile is flexible and free headed. Let the soil unit weight, = 16 kN/m3; the soil friction angle, = 30; and the yield stress of the pile material. FY = 21 MN/m2. 12.23 A 30 m long concrete pile is 305 mm 305 mm in cross section and is fully embedded in a sand dcposit. If nh = 9200 kN/m2, the moment at ground level Mg = 0, the allowable displacement of pile head = 12 mm; Ep = 21 106 kN/m2, and FY(pile) = 21,000 kN/m2, calculate the allowable lateral load, Qg, at the ground level. Use the elastic solution method.
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Determine load carrying capacity of pile without considering critical depth concept. Diameter of pile 0.4 m.Ng =132 for o = 40° to m y 4.b Cot-opf "loose Sand K=1 = 21-15 From. 8a 19 Cu 20k Demse Sund 2 20 $=40° K=2 -I 30°
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Redo Problem 12.20 using Vesics method, assuming that the skin friction is distributed uniformly along the shaft. 12.20 A 600 mm diameter and 25 m long driven concrete pile carries a column load of 1200 kN. It is estimated that the shaft carries 900 kN and the point carries 300 kN. Determine the settlement of the pile head using the Poulos and Davis method with the following data: Es = 25 MN/m2, Ep = 30,000 MN/m2, and s = 0.2