PROBLEM 3: Four columns x Five rows ofgroup piles are installed into a uniform claylayer.Clay soil: c=40 kPa, Nc=7.5Piles: Diameter = 350mm, Length=35m, Pile topile spacing (center to center)=0.90m, pileedge distance (center of pile to edge of pilecap) =0.75mPile cap: Thickness=950mm, pilecover=100mm, clear cover=75mm, db=25mm.f'c=28 MPa, fy=420 MPaHint: Effective depth is found by subtractingthe pile cover, clear cover, and half of bardiameter to the thickness.a) Calculate the ultimate capacity of the pileusing single pile analysis if alpha = 0.74b) Calculate the ultimate capacity of the pileusing block action if alpha = 0.74c) Determine the group efficiency using thecalculated values above.

The question is based on the group of piles installed in the clay. The thickness of the pile cap,…

Answered: layer. Clay soil: c=40 kPa, Nc=7.5…

layer. Clay soil: c=40 kPa, Nc=7.5 Piles: Diameter = 350mm, Length=35m, Pile to pile spacing (center to center)=0.90m, pile

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter12: Pile Foundations

Section: Chapter Questions

Problem 12.8P: Consider a 500 mm diameter pile having a length of 18 m in a clay. Given: γ = 20.0 kN/m3 and cu = 60...

See similar textbooks

Related questions

Q: For both Frames above. Solve the reactions with the given dimensions for each using: A) Basic…

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

Q: Using the node method, analyze the following armature (analysis path A-> C -> D ->E ->F) Pc=800lb,…

A: Using the node method, we have to analyze the following armature.Analysis path A-> C -> D…

Q: A shear wall of length 5 m, height 3 m and thickness 250 mm has to resist the force due to…

A: Given that :-length = L = 5 mheight = h = 3 mthickness = t = 250 mmTo calculate the section modulus…

Q: 2. For a specific beam cross-section, the required reinforcement is analyzed as A, = 3.0 in.² and fy…

A: As = 3 in2fy = 80000 psi

Q: Use the default k-factor and D-factor to determine the approximate DDHV of a section of highway in…

A: Given data,current AADT=88000 vehiclesn=20yearslocated in urban areaAnnual growth rate is…

Q: 5. A lagoon has a surface area of 250x106 m². The average annual rainfall and evaporation are…

Q: What is the maximum moment about minor axis in N-m? Considering sag rods and tie rods at third…

A: Purlin is spaced at = 1.1967 m

Q: 3-6 What factors affect the shrinkage of concrete? 3-7 What factors affect the creep of concrete?

A: Concrete Shrinkage : Shrinkage is defined as change in length with respect to unit length.Concrete…

Q: 2.1m 16 0 ORC 17KN 3.6m 90° 8kN 3.6m 18kN Determine the support reaction, show the angles used (…

A: Given data,truss given with loadingFINDreaction angle at C

Q: Angle of the resultant R (in degrees, measured counter-clockwise from the positive x-axis)

Q: A 20m x 20m grid is set out over a T shaped section. Levels are taken on teh grid, and RLs…

A: To find the total volume of excavation using the grid levelling method.

Q: 2-9. Resolve the 25-lb force into components acting along the u and u axes and determine the…

Q: 2.8m D B A 1.6m 2.4m 12KN 90° F 1.6m dla J 90° 12KN 1.6m 2.4m Determine the nature of forces CD, CF…

A: Given datatruss is given with loadingHinge at B and roller support at AFINDnature of forces in CD,…

Q: Please determine the reactions for the structure shown. Is this a truss or a frame? Why? B C AY 3 m3…

A: Given data,fig of structure given with loadingFINDreactionsis this truss or frame? why?

Q: 4.7 A sample of clay was obtained from a point below the groundwater table. A moisture con- tent…

A: Moisture content is given by w ;where ;Wm = Mass of moist soilWd = Mass of dry soilSubstituting the…

Q: Determine: Magnitude of the resultant R (in kN)

Q: Figure 1.10(a) from Song (2018), shown at right, illustrates the capillary rise, h, for a…

A: Capillarity or Capillary Action is the phenomenon of movement of a liquid, in a small tube held…

Q: Given a W30x90 beam made from A992 steel: 1) What is the Mn-Lb plot for the limit state of lateral…

Q: 2-38. Express each of the three forces acting on the column in Cartesian vector form and compute the…

Q: How can event-driven architecture enhance energy conservation in manufacturing plants by optimizing…

A: Event-driven architecture (EDA) can play a crucial role in enhancing energy conservation in…

Q: Question 3. The cable AE supports three vertical loads from the points indicated. If point C is 1.5…

A: Determinea. Elevation of point B and D. b. Maximum slope and maximum tension in the cable.

Q: 2. For the truss shown below, determine the stress in members AC and BD. The cross-sectional area of…

Q: The space between two plates (20cm*20cm*1cm), 1 cm apart, is filled with a liquid of viscosity 1…

Q: P A (0) B (2) (3) FIGURE P1.6/7 P1.7 WP Axial loads are applied with rigid bearing plates to the…

Q: Fundamental Problem 6.11 Determine the force in members GF, GD, and CD of the truss. State if the…

Q: A contractor needs 3715 m³ of aggregate base for a highway construction project. It will be…

Q: Design a purlin for a roof truss having the following data: Span of the truss = 6.0m Spacing of…

A: Span of the truss = 6.0mSpacing of truss = 3m c/c.Inclination of roof = 30oSpacing of Purlin = 2m…

Q: Questions 1. Define specific gravity of soil. 2. What are typical values of specific gravity for…

A: given data,multiple questions are given regarding the specific gravity of soil.let's discuss about…

Q: A rectangular channel of bed width 2 m is to be laid at a bed slope of 1 in 1000. Find the hydraulic…

A: Rectangular channel-Bed width B=2 m,Bed slope 1 in 1000,Constant C=50,To Find-The value of hydraulic…

Q: A 225mm by 75mm timber beam is being designed for shear. The load is medium term, the beam is solid…

Q: Determine w = 6 k/ft A the Reactions at A and B, given: P=28 k 0 = 60° L1=4 ft L2=2 ft TITT W P 0 B

Q: b 110° a 30° R = 800 N

A: A rod is pulled by force (R) = 800 N.Angle of inclination = 30° with a direction.

Q: Please determine the reactions for the structure shown. Is this a truss or a frame? Why? 5 ft 1 k/ft…

A: A simply supported beam with trapezoidal loading and two concentrated loads. Point A has roller…

Q: You encounter a scale France that measures weight in kilos. You step on the scale to see your…

A: Given weight W =51kg

Q: Design for the square Tie-Column (500x500)mm to carry applied D.L = 500KN, L.L=800kN and B.M (L.L) =…

A: Size of columnApplied dead load, Applied live load, Moment live load, Moment dead load, Compressive…

Q: oyalty or Integrity: which should be the most important to engineers?

A: Loyality and integrity are actually two sides of the same coin. It is hard to find the right and…

Q: 9.18. The 10-yr IDF function, i(t), for Boston, Mass- achusetts, can be estimated by the relation i…

Q: X ΔΗ 2 Part B If R = 3.21 in and P2 = Patm = 12.2 psi, find P₁ in [psi]. X Part A A manometer is…

A: Given,the equation for pressure due to a fluid column, : specific weight of the fluidh: height of…

Q: Draw shear force and bending moment diagram. Need only a handwritten solution only (not a typed one

Q: The offset distance of a simple curve from the PT to the tangent line passing through PC is equal to…

Q: A dam shown in Figure 1 retains 10 m of water. A sheet pile wall (cutoff curtain) on the upstream…

A: A seepage path and sheet pile is shown in the above figure. We have to find out the followings:…

Q: 13. A contractor needs 375 m³ of aggrega to a dry unit weight of 18.9 kN/m³. This n at a water…

Q: A pre-stressed concrete beam of section 190mm wide and 350mm deep is used over an effective span of…

Q: A cylinder of plastic is 100 mm long, and 50 mm in diameter. It has a mass of 1 kg. Determine its…

Q: 1. Why is it not recommended to leave an oven-dried sample in the open air for a long time before…

A: Oven Dried Method is one of the most accurate methods. In this method water content in sample is…

Q: 3.6.4 Suppose a vertica oil of specific gravity Figure P3.6.4. How de- horizontal force on th…

Q: A. All the member forces using the Method of Joints B. Axial force at member BE using the Method of…

Q: A 220 lb force A and a 500 lb force B act on a bracket as shown. Their resultant is C. In the…

Q: 1.4 If a granular soil is compacted to a moist unit weight of 20.45kN/m³ at a moisture content of…

Q: Determine the forces in the members identified by “×” of the truss shown by the method of sections

A: Given:Required:Forces in members identified by 'x'

Concept explainers

Measuring site work, Excavation and Piling

Bid drawings typically include very little material about the precise requirements of site work operations, measuring site work and excavation work differs from measuring most other works on a construction project. The actual site work conditions are not provided and also the dimensions of the excavations are not known during the pre-construction phase. The precise measurement of the excavation and backfill of the earth material and topsoil is important for a contractor to decide upon the total cost required for the process. All the works should be carried out under OSHA (Occupational Safety and Health Administration) standards to ensure the safety of the workers.

Question

PROBLEM 3: Four columns x Five rows of
group piles are installed into a uniform clay
layer.
Clay soil: c=40 kPa, Nc=7.5
Piles: Diameter = 350mm, Length=35m, Pile to
pile spacing (center to center)=0.90m, pile
edge distance (center of pile to edge of pile
cap) =0.75m
Pile cap: Thickness=950mm, pile
cover=100mm, clear cover=75mm, db=25mm.
f'c=28 MPa, fy=420 MPa
Hint: Effective depth is found by subtracting
the pile cover, clear cover, and half of bar
diameter to the thickness.
a) Calculate the ultimate capacity of the pile
using single pile analysis if alpha = 0.74
b) Calculate the ultimate capacity of the pile
using block action if alpha = 0.74
c) Determine the group efficiency using the
calculated values above.

Expert Solution

This question has been solved!

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

SEE SOLUTION Check out a sample Q&A here

Step 1: Introduction :

VIEW

Step 2: Given Data :

VIEW

Step 3: Ultimate capacity of pile using single pile analysis :

VIEW

Step 4: Ultimate capacity of pile using block action :

VIEW

Step 5: Group Efficiency of pile

VIEW

Solution

VIEW

Step by step

Solved in 6 steps with 14 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Measuring sitework, excavation and piling

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

Four columns x Five rows of group piles are installed into a uniform clay layer. Clay soil: c=40 kPa, Nc=7.5 Piles: Diameter = 350mm, Length=35m, Pile to pile spacing (center to center)=0.90m, pile edge distance (center of pile to edge of pile cap) =0.75m Pile cap: Thickness=950mm, pile cover=100mm, clear cover=75mm, db=25mm. f'c=28 MPa, fy=420 MPa Hint: Effective depth is found by subtracting the pile cover, clear cover, and half of bar diameter to the thickness. Please refer to the module a) Calculate the ultimate capacity of the pile using single pile analysis if alpha = 0.74 b) Calculate the ultimate capacity of the pile using block action if alpha = 0.74 c) Determine the group efficiency using the calculated values above.
Determine the consolidation settlement of piles group shown below. Sand y = 105 lb/ft³ Groundwater table 45 ft 2V:1H Clay Clay (not to scale) 30 ft Q₂ = 500 Kip di A A0(2) x 3 ft 27 ft 21 ft (3 40(3) 2V:IH 6 ft Cay Ysat = 115 lb/ft³ 48 ft = 0.82 C₁ = 0.3 Ysat = 120 lb/ft³ € = 0.7 12 ft C = 0.2 Rock Pile group: L = 9 ft: B,= 6 ft Ysat = 122 lb/ft³ 6te = 0.75 C₂ = 0.25
PROBLEM 3: Four columns x Five rows of group piles are installed into a uniform clay layer. Clay soil: c=40 kPa, Nc=7.5 Piles: Diameter = 350mm, Length=35m, Pile to %3D pile spacing (center to center)=0.90m, pile edge distance (center of pile to edge of pile cap) =0.75m Pile cap: Thickness=950mm, pile cover=100mm, clear cover=75mm, db=25mm. f'c=28 MPa, fy=D420 MPa Hint: Effective depth is found by subtracting the pile cover, clear cover, and half of bar diameter to the thickness. a) Calculate the ultimate capacity of the pile using single pile analysis if alpha = 0.74 b) Calculate the ultimate capacity of the pile using block action if alpha = 0.74 c) Determine the group efficiency using the calculated values above.
A 3 x 3 pile group with pile spacing of 1 m and pile diameter of 0.40 m supports a load of 3 MN. Which of the following most nearly gives the consolidation settlement of clay layer in millimeter (e=0.65, Cc=0.30)?
Consider a 500 mm diameter pile having a length of 18 m in a clay. Given: γ = 20.0 kN/m3 and cu = 60 kN/m2. Determine the maximum allowable load (Qall) with FS = 3. Use the α method and Table 12.11 for determining the skin friction and Eq. (12.20) for determining the point load. Allow a factor of safety of 3. What percentage of the ultimate load is being carried by the pile shaft? Is it a friction pile?
X XXX L 4m X 5m 6 m Key: PILE I Soil 1 c = 35 kPa Y = 16.79 kN/m³ Soil 2 GROUND LEVEL c = 45 kPa Y = 18.76 kN/m³ Soil 3 c = 55 kPa Y = 19.71 kN/m² Soil 4 c = 60 kPa Y = 20.72 kN/m³ Question: Estimate the pile length required to carry the 900 kN axial load for the pile-soil system shown in the figure above.
What is the diameter to thickness ratio of the conical pile sample after carefully flattening or pressing down the apex with a shovel before quartering? Choices * D = 1t to 2t * D = 5t to 10t * D = 4t to 8t * D = 3t to 6t
Q4.11 Calculate the combined settlement (81 + 82 + d3) of a single bored pile in a deep uniform clay layer with the following characteristics: Pile depth = 7 m, Pile diameter = 0.5 m, Epile = 15 GPa, Pile load = 120 kN, Ycay = 18.5 kN/m³, cu (cay) = 35 kPa, Esoil = 3.8 MPa and Poisson's ratio of soil = 0.5. %3D
Determine the design capacity of the pile group shown below. The pile cap thickness is 1.5 meters, and groundwater table is located 2.8 meters below the ground surface. Piles are 350-mm in diameter and 12 meters in length. Use a critical depth equal to 18*dpile (starting from ground level), K = 3, ac (adhesion factor for clay) = 0.5, a, (wall friction angle for sand)= 25°, and FS = 3. Only consider single-pile action and neglect the capacity of the pile cap. Ground Level 1.5 m- Firm Clay c = 35 kPa Yary = 14.6 kN/m³ Yaut = 17.9 kN/m³ 3.5 m Medium Dense Sand 31° - 6.2 m Yary = 16.8 kN/m³ Yaat = 19.4 kN/m³ Layout of Pile Group Dense Sand 9 = 42° Yary = 18.2 kN/m³ Yu- 20.1 kN/m³ N - 200
Answer the following 1-Point bearing piles extend to a stable soil or rock layer below the superstructure. [T\F] 2- In loose sand, the unit skin friction is lower for a high-displacement pile, when compared to a low-displacement pile (at similar depths). [T\F] 3-Typically we place shallow foundations underground. [T\F] 4- If the spread footing covers more than 50% of the building footprint, a mat or deep foundation is more economical. [T\F]
Foundation Engineering Exercise x Bearing Capacity Supplemental O File | C:/Users/CABALAG/Downloads/Bearing%20Capacity%20Supplemental%20Materials%2001242022.pdf 1. The diameter of the round steel pipe pile is 0.5 m (1.64ft), and it is 10m (32.8 ft) long. The pile is driven into a sandy soil stratum as shown. Compute the ultimate bearing capacity and allowable bearing capacity. Use FS=3.0 Sand y = 17.3 kN/m³ (110 lb/ft°) Pile length = 10 m (32.8 ft) Pile diameter= 0.5 m (1.64 ft) Friction angle () = 30° 10 m 5:41 PM 30°C Mostly sunny A O G 4) O ENG 1/28/2022
Check the total settlement of a group of pile as shown in Figure 1. The total allowable settlement is set not exceed 3% of the pile diameter and the overconsolidated ratio (OCR) of the clay is more than 1. The groundwater table is located 15m beneath the ground level. The diameter of the pile, b is 0.5m and the spacing between piles, s is 2m.The pile group is subjected to foundation load of 5425kN. The laboratory testing data for the soil samples taken are as follows: At 5m, eo = 0.55, Cc = 0.32, C; = 0.09, o'o = 150kN/m? At 10m, eo = 0.55, Cc = 0.32, Cs = 0.09, o'o = 225kN/m2 %3D At 12m, eo = 0.55, Cc = 0.32, C; = 0.09, o'o = 300KN/m2 %3D 7m 5m Clay 3 10m Unit weight = 18KN/m %3D Friction angle = 0 degree 2 Cohesion = 100KN/m