SITUATION: A precast concrete pile 16 m long has a diameter of 400 mm. The pile is driven through layers of clay and a dense compact sand with the upper layer which is clay having a thickness of 5 m and a unit weight of 16 kN/m². Water table is at the bottom of the clay layer. Saturated unit weight of sand is 18 kN/m?, with a bearing capacity factor of 72 and a lateral pressure factor for compression of 1.24. Angle of friction of the concrete pile is 28°. Neglect skin friction on the clay layer. Determine the design capacity of the pile using a factor of safety of 2.5.

SITUATION: A precast concrete pile 16 m long has a diameter of 400 mm. The pile is driven through layers of clay and a dense compact sand with the upper layer which is clay having a thickness of 5 m and a unit weight of 16 kN/m². Water table is at the bottom of the clay layer. Saturated unit weight of sand is 18 kN/m?, with a bearing capacity factor of 72 and a lateral pressure factor for compression of 1.24. Angle of friction of the concrete pile is 28°. Neglect skin friction on the clay layer. Determine the design capacity of the pile using a factor of safety of 2.5.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Related questions

Q: A rectangular pile (0.5 x 0.5 m.) is driven in a clayey soil arrangement composed of two different…

A: Please refer the attached image for complete solution. THANK YOU.

Q: 3.8 The soil profi le at a site for an offshore structure is shown in Figure P13.8. The height of…

A: Given:- The height of the pile above the sand surface = 15 m The diameter of the pile = 1.25 m The…

Q: Example 3 A 12 m prestressed concrete pile 450 mm square is installed in a clay with water table at…

A: given- 12 m prestressed concrete pile450 mm squareclay with water table at 5 m depthupper clay layer…

Q: A circular pile of diameter 0.6 m and length 8 m was constructed in a cohesive soil stratum having…

A: we have to determine the allowable load

Q: 7 A concrete pile 15.24 m long having a cross section of 406 mm x 406 mm is fully embedded in a…

Q: A 450 mm x 450 mm concrete pile 20.0 m long is driven into sand deposits with y = 17 kN/m³ and =…

Q: Nine-pile group consist of 0.27-meter-diameter friction concrete piles 23 m long arranged in 3 rows…

Q: Q1) Find the ultimate load on the concrete pile shown in Fig. (1). Sand y = 20 kN/m³ $ = 30° k=1.0,8…

A: Given Data Determine the ultimate load on the concrete (Qu).

Q: n 19 m into the soil profile shown in figure. Compute the net ultimate toe-bearing capacity.

A: The expression for Young modulus is given as E=βoOCR+β1N60 From table 4.7, 'β factor for soil' for…

Q: 2. A 0.45 m diameter, 20 m long, precast concrete pile is driven into a sandy soil profile. The SPT…

A: ###DETERMINATION OF Ultimate bearing Capacity of Driven Pile into a Sandy Soil wih SPT value given…

Q: A 25 m deep bored pile has a shaft of 1 m diameter and enlarged base of 2.5 m diameter in the lower…

A: Length of bored pipe = 25m Shaft Diameter = 1m Diameter of enlarged portion = 2.5 m Area of…

Q: A square concrete pile12m long is shown in Figure. Estimate the following: Ultimate shaft carrying…

A: The flow of fluid includes movement of an unbalanced fluid. As long as unequalled forces are in…

Q: A concrete pile with 20 m embedded length having 50 cm diameter is driven into a homogeneous…

A: Length of the pile, L = 20mDiameter of the pile, D = 0.5mCohesion, Cu = 30kN/m2Adhesion factor, =…

Q: rectangular pile (0.54 x 0.63) is driven in clayey soil arrangement composed of two different…

Q: A 500mm x 500mm precast concrete driven pile, 15 m long, is proposed to support a column load in a…

A: Given, B=500 mm L=15 m Nc*=9 cu=100

Q: A 20 m long horizontal concrete floor under a barrage on a permeable foundation retains a 5 m head…

A: Given-Length L=20 m,Head =5 m,5 m deep downstream end pile.Calculate the exit gradient.

Q: A circular pile with a diameter of 400 mm was driven to a depth of 12 meters into the normally…

Q: A group of piles as shown on the figure has a cross section of 0.30 m x 0.30 m. It has a total…

Q: A 25m deep bored pile has a shaft of diameter 1m and enlarged base of 2.5m diameter in lower 1.5m…

A: Given data- 25 m deep bored pile, Shaft diameter=1 m, Base diameter = 2.5 m, Undrained cohesion=100…

Q: Calculate the allowable axial load for the driven pile of ( 0.5 m) dia. And ( 20 m) depth, in a…

A: Solution: “Since you have asked multiple questions, we will solve the first question for you. If you…

Q: A circular pile having a diameter of 0.45 m is 10 m long is embedded in a layer of loose sand with…

A: d=0.45 mL=10 mγ= 17.6 kN/cu.mγsat= 20.4 kN/cu.mϕ= 34°FOS= 3Nq= 79Depth of water table =3 mK= 1.15 To…

Q: An anchored sheet pile is to support a mass of cohesionless soil up to a height of 6 m above ground…

A: Given- cohesionless soil height=6 mspacing of anchor=1 munit weight of soil=21 kN/m3angle of…

Q: For a pile foundation under a column, 5 identical foundation piles are used, with diameter D…

A: The characteristic value of bearing capacity Ra can be found out as shown below: Where, n = Number…

Q: ed in a layer of sand. The following is an approximation penetration resistance (q.) and the…

A: Given:- pile size=0.406m x 0.406m L=18.3m FS=4 To find:- allowable bearing capacity of the pile

Q: A square pile group of 9 piles passes through a recently filled up material of 3.5 m depth. The…

A: A square pile group of 9 piles,Depth of pile = 9 m,Depth of soil fill =3.5 m,Diameter of the pile=30…

Q: Determine the diameter of 70 ft long pile driven in the medium dense sand (Shown in Figure). Design…

Q: Question A pile of 0.50 m diameter and of length 10 m is embedded in a deposit of clay. The…

Q: concrete pile 1S.24 m long haVing fully embedded in a saturated clay layer for which y = 19.02…

A: Capacity of the pile shaft isQ=∑ αCuPLusing tableα=0.54…

Q: A rectangular pile (0.77 x 0.72 m) is driven in a clayey soil arrangement composed of two different…

A: Given Pile dimensions : 0.77m x 0.72m Factor of safety : 2 Figure corresponds to given data: Skin…

Q: The length of a horizontal floor is 14 m and a 3.5 m deep vertical sheet pile is attached at its D/S…

A: Given, length of the floor =14 m depth =3.5 m sheet is attached to D/S end Head of the water =4 m…

Q: A square group of 9 piles (3 in each row) is installed in a clayey soil. The diameter of each pile…

A: Given:Total number of square group of piles, n=9In each row=3diameter of each pile, d=40 cm or 0.4…

Q: Check the pile load of the Railroad Bridge of (hilla) for 3000 KN with pile diameter (1.1 m). The…

A: Given: Details of a pile Load = 3000kN,Pile diameter = 1.1 m Bored depth of pile = 20 m Bored depth…

Q: Determine the allowable load capacity of the 0.4 m diameter pile shown in Figure 4. The fill is new…

Concept explainers

Load and resistance factor design

Load and resistance factors design (LRFD), also known as Limit state design (LSD), refers to the design method used in building engineering. A boundary condition is a condition of a structure where it can no longer meet the relevant design requirements. The condition may refer to the load level or other actions on the structure, while the terms refer to the integrity of the structure, suitability for use, durability, or other design requirements. A structure designed for LRFD is limited to keeping track of all possible actions during its design time and is always ready for use, with the appropriate level of reliability in each boundary condition. LRFD-based construction codes clearly define the appropriate levels of reliability in their instructions.

Question

SITUATION: A precast concrete pile 16 m long has a diameter of 400 mm. The pile is driven through layers of clay and a dense compact sand with the upper
layer which is clay having a thickness of 5 m and a unit weight of 16 kN/m². Water table is at the bottom of the clay layer. Saturated unit weight of sand is 18
kN/m?, with a bearing capacity factor of 72 and a lateral pressure factor for compression of 1.24. Angle of friction of the concrete pile is 28°. Neglect skin
friction on the clay layer.
Determine the design capacity of the pile using a factor of safety of 2.5.
A
925.31 kN
985.48 kN
970.53 kN
D
994.75 kN

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Step 5

Trending now

This is a popular solution!

Step by step

Solved in 5 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.

Similar questions

A square pile of section 30 cm x 30 cm and length 10 m penetrates a deposit of clay having c = 50 kN/m² and the adhesion factor = 0.8. The load carried by the pile shaft only is
A 10m long and 0.8m diameter precast concrete pile is driven into a saturated clay deposit as shown in the figure below. The groundwater table is at the ground surface. For the ratio of the undrained shear strength to vertical effective pressure is approximated as follows: = 0.11 + 0.0037(PI) NC (9- 9 (OCR)8 OC Determine the bearing capacity for the pile by the a) Alpha (a) method. b) Lambda (A) method Depth, m Layer 1 OCR = 5, Yat = 19.5 kN/m³, Pl = 35 Layer 2 OCR = 1.5, %at = 19.0 kN/m, Pl = 25 Layer 3 OCR = 8, %at = 19.5 kN/m, Pl = 20 10 D, = 0.8 m D 10 m
Q- A pile of 0.50 m diameter and of length 10 m is embedded in a deposit of clay. The undrained strength parameters of the clay are cohesion = 60 kN/m² and the angle of internal friction = 0. Find the skin friction capacity (kN) of the pile for an adhesion factor of 0.6.
A concrete pile, 350 mm square, is driven into a thick deposit of medium sand with φ= 35° and ϒ = 19kn/m3. The water table lies at 2.0 m below ground level. Estimate the length of pile required to support a working load of 450 KN assuming a an overall factor of safety of 2.5. I will report and downvote wrong answer
(a) A 500 mm diameter bored pile is to be designed to support a safe vertical load of 25P kN. Where P = 8. The factor of safety is 2.5 and it is to be applied to the ultimate load. The succession of strata is 2 m of loose fill overlying firm, becoming stiff clay with depth. No side friction is to be allowed in the fill. For the clay the undrained cohesion cu (kPa) = 3z+40, where z is the depth in metres below ground level. %3D Calculate the minimum length of the pile required to support the load. Take a = 0.4, and Nc = 9. %3D (b) A pile weighing 8P kN has been proposed to be driven down into three layers of different materials as shown in Figure Q2, to support a structural load from a proposed building project. Where P = 8. Calculate the number of piles needed to support an ultimate structural load of Qu MN. Where Qu is the last two digits of your students' identification number (SID). For pile in cohesionless soil, assume o = 4'.
3. A concrete pile 15.24 m long having a cross section of 406 mm × 406 mm is fully embedded in a saturated clay layer for which Ysat 19.02 kN/m³, Ø = 0, and cu=76.7 kN/m². Determine the allowable load that the pile can carry (Assuming FS-3). Use the a method to estimate the skin friction and Vesic's method for point load estimation.
Q1: Determine the allowable load capacity for the driven pile of 0.6 m diameter embedded in a layered soil as shown in the figure below, use F.S 2.0 , K, = 1.5 and tand =0.5? ELEV. 110 N.C.C W.T ELEV. 108 Cu =70 kPa Y = 17 kN/m3 a = 1, yw = 10 kN/m? ELEV. 102 O.C.C, Cu 180 kPa, y = 20 kN/m³ a = 0.45 ELEV. 98 Sandy Layer Yt = 19 kN/m3 Ø = 32° Nq = 23.18 ELEV. 90
Q6) Find the ultimate compressive (Qu) and pullout (Tu) capacities of the driven closed-end steel pipe-pile shown in Fig. (6). Given data: outer diameter = 610 mm weight of empty pipe = 186.8 kg/m a = 1 for cu ≤ 25 kPa ぬ。 34 35 36 Disp. Piles 41.3 49.9 60.9 Cu = 12 kN/m² Ysat = 16 kN/m³ Cu = 50 kN/m² Ysat = 18 kN/m³ c=0 Cu = 100 kN/m² Ysat = 20 kN/m³ = 35° Ysat = 20 kN/m³ 3 wall thickness = 12.7 mm pile to be filled with concrete. α = 0.5 for c₂ ≥ 75 kPa No Non-disp. Piles Fig. (6) 20.3 24.6 30.1 W.T. - Ans.: Qu= 4165 kN, T₂ = 1696 kN 6 m 4.5 m 4.5 m 6 m
A pile of diameter 250 mm is installed in a soil strata with a recently filled layer of clay of 3 m depth. The unit cohesion of the material is 18 kN/m² and unit weight of soil is 15 kN/m². The negative skin friction on the pile is equal to. (assume adhesion factor = 0.4)