A 16 in diameter, 75 ft long drilled displacement pile is made of grout with f'c = 5,000 lb/in2. A steel ratio of 0.04 is to be used in the upper 30 ft, and a steel ratio of 0.001 for the remainder of the pile. Compute the modulus of elasticity for the upper and lower portions of this pile.

Q: Three cast-in-place piles with a diameter of 480mm are installed under a certain platform, the pile…

A: As given in the question, a pile is casted in three layers of soil. The shear resistance of each…

Q: 2. Determine the allowable load carrying capacity of the pile shown below. The average unit skin…

A: Given that,  average unit skin resistance =  1.2kN/m2 unit point resistance =  30kN/m2 FS=3.0 length…

Q: For the figure shown if the pile length is 15 m Find the factor of safety (Fs), if the allowable…

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Q: A single pile of diameter 50 cm and length 10 m is driven into clay having unconfined compressive…

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Q: A 500 mm wide, square section pile, 12 m long is driven in a deep deposit of uniform clay. Value of…

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Q: PROB 1 A circular prestressed concrete pile having a diameter of 40 cm is to be driven in a layer of…

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Q: A group of 25 HP 10 * 57 piles are arranged in a 5 * 5 grid at 27 inches on center and driven to a…

A: Given:- 5* 5 grid pile 25 HP 10*57 piles spacing , s = 27 inch s=2.25 feet L = 60 ft fn=1000 lb/ft2…

Q: Q6) Determine the combined stress in HP 14 x 89 pile shown below. The pile is 25 feet long. E =…

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

Q: For the sheet pile condition shown in the figure, find the depth below the drec net pressure equals…

A: Ka=1-sinϕ1+sinϕ=1-sin 301+ sin 30⇒Ka=0.33also,Kp=1+sinϕ1-sinϕ=1+sin 301-sin 30⇒Kp=3…

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 14-in.-diameter steel pipe pile is driven 50 ft into overconsolidated clays having the following…

A: The ultimate bearing capacity of the pile is given by,

Q: A precast wooden pile is being driven with 50 kN drop hammer having a free fall of 100 cm, take set…

A: Given data- Weight of the drop hammer W=50 kNFree fall distance H=100 cmset S=0.45 cmTo Find-The…

Q: The ultimate load capacity of a 10 m long concrete pile of square cross section 500 mm x 500 mm…

A: Solution: The correct option for above question is  (B) i.e 632.5 kN For Pile 1 Ultimate load…

Q: Assume the curve shown in Figure 14.14 has been obtained from a static load test on a 60 ft long,…

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Q: An 18-in.-diameter, closed-ended steel pipe pile is driven 45 ft through soft sandy silt to bear on…

A: The tip resistance is generally obtained by the force required to push the tip of the cone…

Q: 3. As shown in the diagram, the RC solid precast square pile will be lifted up by two points, the…

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Q: What is the design capacity of a square pile 0.3 x 0.3 m if it has a skin fiction of 660 KN. Assume…

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Q: Determine the ultimate bearing load of the pile using Tomlinson for a 12.5-m closed-end steel pipe…

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Q: 1 A steel pile (H-section; HP 360 x 152; see Table 11.1) is driven into a layer of sandstone. The…

A: qud=qulab5qud=78.7MN·m-25=15.74MN·m-2Nϕ=tan245+ϕ2=tan245+362=3.852

Q: A square pile, 17 m long is driven into a homogeneous sand layer. The pile's width (diameter) is…

A: According to the Briaud & tucker method the skin friction is calculated as Qs=fsAs The value of…

Q: 1. The diameter of the round steel pipe pile is 0.5 m (1.64ft), and it is 10m (32.8 ft) long. The…

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Q: For the pile distribution below, determine the load Pp that the red pile will receive, in Ton. P=254…

A: given:d= 2 mex=0.2 mey=0.3 mH=1.3 mP=254 ton

Q: For the pile distribution below, determine the load Pp that the red pile will receive, in Ton. P =…

A: Step 1

Q: A closed ended precast concrete pile, circular cross section with 1 ft diameter, is driven in…

A: Pile diameter 1 ft. End bearing capacity of pile Qp = Ab×fb  fb= σv'Nq   σv'=105×5+112.4×20-62.43×20…

Q: A cast-in-situ bored pile 0.50 m diameter and 10 m deep is placed in a purely cohesive soil. If the…

A: Given that, Diameter of the pile= 0.5m Cohesion of the pile Cu = 4t/m² Ultimate bearing capacity of…

Q: A 0.30-m square prestressed concrete pile is to be driven in a clayey soil as shown in figure. Use…

A: Given: size of pile  Cohesion  Aplha  To find: End bearing capacity Skin friction

Q: A- The load (Q=900 ton) locate at x, determine the max. & min. pile reaction for the given condition…

A: The pile is the supporting or substructure for the bridge or building when loading is acting due to…

Q: A concrete bored pile has a diameter of 800 mm as given in the figure below. Calculate the ultimate…

A: Solution Given Data Diameter= 800 mm=0.8 m

Q: Determine the allowable load for a steel closed-ended  pipe pile, 0.4 m in diameter, driven 20 m…

A: Calculating the stress value at different location: σ1'=18×5-9.815=40.95…

Q: 525 kN Medium clay 5 m Cu = 60 kPa Stiff clay Cu = 100 kPa

A:

Q: A 30 cm diameter concrete pile is driven into a homogeneous consolidated clay deposit (C = 40 kPa, a…

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Q: . A steel H-pile (section HP13 x100) is driven by a hammer. The maximum rated hammer energy is 40…

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Q: Q- Find the total load carrying capacity of a group of 9 piles with a group efficiency factor of…

A: given Load carrying capacity of one friction pile =200 kNgroup efficiency=0.9total number of piles=9

Q: P-2 A driven closed-ended pile, circular in cross section, is shown in the Figure. Calculate the…

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Q: The average values of the undrained shear strength (c,) with depth are given below. IT Depth (m) C,…

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Q: b) A bored pile was installed in dense sand with the following data- kN/m The ground water table was…

A: Diameter of pile (d) = 0.6 mLength of pile( L) = 20 mAngle of internal friction(ϕ) = 30°γ = 20…

Q: c. A concrete pile is 15m long and has 406 mm diameter circular cross section. The pile is fully…

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Q: A 400 mm diameter friction pile is embedded into 8 m homogeneous consolidated deposit. Cohesion…

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Q: A group of driven piles are to be built in layered soils as shown in the figure below. Please…

A: For ϕ = 35o ,   Nq = 33.5 Assuming pile to be concrete, and for loose sand {as γ=120psf}; k = 1…

Q: A single pile, 60 cm in diameter and 15 m long, is driven in clay having an average unconfined…

A: Given, d=60 cmL=15 mcu=1202 kN/m2cu=60 kN/m2α=0.75

Q: A 10m long and 0.8m diameter precast concrete pile is driven into a saturated clay deposit as shown…

A: (a) The expression for the bearing capacity by alpha method is given by, Qup=9CAb+αCAS Here,…

Q: A driven closed ended pipe pile is shown below a) Find the ultimate point load b) Determine the…

A: The formula used for calculating ultimate point load- Qp=APqPWhere QP=Ultimate point loadAP=Area of…

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: Q1/ For the footing shown in Figure (1). estimate the pile group capacity. 0.6m dia bored pile Clay…

A: Ultimate load carrying capacity of pile: It is the maximum load which can be applied on pile without…

Q: Check the total settlement of a group of pile as shown in Figure 1. The total allowable settlement…

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Q: 1. Find the skin friction capacity of pile if frictional constant is 0.76. a. 1360.2 kN b. 1723.68…

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Q: 3. A cantilever sheet pile is 8 m. Iong with a depth of embedment of 3.5m. Angle of friction of the…

A:

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.