Bundle: Principles Of Foundation Engineering, 9th + Mindtap Engineering, 1 Term (6 Months) Printed Access Card
9th Edition
ISBN: 9781337947060
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Question
Chapter 16, Problem 16.19P
To determine
Draw the variation of the lateral earth pressure with depth.
Find the resultant load.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Considering that the horizontal thrust from the back of a 5.5 m wide brick wall to the 1 m deep part of the wall is H = 55 kN
a) Find the greatest stress in the base when b = 2 m.b) Find the width b so that there is a shrinkage zone at the base.(Note: unit weight of brick wall ỿ = 24 kN / m3 )
Answer: ϭmax=0,30 Mpa, b=2,23 m
An 8 m tall retaining wall holds cohesionless sand with a density and angle of internal friction of 1.85 Mg/m3 and 33°, respectively. If the surface of the backfill slopes upwards at 86° to the vertical, Use Rankine’s conditions to find the force per unit length of the wall and its location for (a) Active State (b) Passive State Please draw the pressure diagram neatly for both cases
The following figure shows a section of an anchored retaining wall embedded into a saturated stiff clay layer.
The sand has a unit weight of = 18 kN/m³, c' = 0 kPa and o' = 34º.
The clay has a unit weight of
= 20 kN/m³, c₁ = 80 kPa and = 0°. A uniform pressure of 40 kPa is applied on the soil surface.
The short term stability of the wall is considered in an undrained analysis.
Use the Rankin's theory of lateral earth pressure to determine the active and passive horizontal stresses.
You should apply the requirements of AS 4678 and the partial factors of safety method in estimation of soil pressures.
Assume the soil is in-situ and use a structural classification factor of ₁ = 1.
3m
1m
Water table
1.5m
40 kPa
Not to Scale
Sand
Clay
Ta
Chapter 16 Solutions
Bundle: Principles Of Foundation Engineering, 9th + Mindtap Engineering, 1 Term (6 Months) Printed Access Card
Knowledge Booster
Similar questions
- It was found that the backfill against a retaining wall (6 meters in height as shown in Figure 3) has specify weight y= 16 kN/m³ when its water content w= 5 %, S = 0.12, its internal friction angle was measured as 30° (take G,= 2.7 and xw = 10 kN/m³). a. Predict distribution of lateral stress on this retaining wall along its depth in its “at rest" state, and its resultant force. b. Rain leads the backfill water content increase to 10% in its upper half, and saturated in its lower half, find and plot its lateral stress and pore pressures along its depth in an active state.arrow_forwardA single rectangular opening 10 ft (3.0 m) in height is driven in rock having strengths of fc = 18,000 lb/in2 (124 MPa) and ft=1500 lb/in2. (10.3 MPa).Rock specific gravity is 2.3.The opening is located at depth of 2000 ft (610 m) in a stress field of no lateral pressure and has a fillet ratio of h .a. Determine if the opening will fail when its width is 20 ft (6.1 m).b. Is there any benefit to reducing the width to 10 ft (3.0 m)? To 5 ft (1.5 m)?c. What is the maximum safe width of opening?arrow_forwardA retaining wall supports a horizontal backfill that is composed of two types of soil. The first layer is 4.74 meters high. It has a unit weight of 17.25 kN/m3. The second layer is 6.6 meters and has a unit weight of 18.4 kN/m3. If the angle of friction for both layers is 32°, determine the total active force (kN) acting on the retaining wall per unit width. Use stored value. Answer in 5 decimal places.arrow_forward
- Determine the lateral earth pressure force on the wall (6.0 m height shown in the figure. Draw the stress distribution and locate the location of the resultant force. Sandy soil kN Ye = 20 O = 36.0°arrow_forward234 kPa 67.8 kPa 101 kPa 31° B 101 kPa 234 kPaarrow_forward7) A circular horizontal N_S tunnel of 2 m radius will be constructed at a depth of 560 m below surface as shown in Figure 1. The vertical stress gradient is found to be 0.025 MPa/m. The horizontal stresses in the north and east directions are on = 13 MPa and ge =14 MPA Estimate the radial and tangential stresses for = 0° and = 90° from the east axis. 560 m Narrow_forward
- 4. An L-shaped raft as uniform pressure of 80 kPa. Determine the vertical stress increase at 8 m below the ground level: shown lies at the ground level and applies a a. beneath point A using influence values b. beneath point A using Newmark's chart 20m 10m 20m 10marrow_forwardQ2 A smooth backed wall is 6m height and retain a soil with the properties shown in the Figure below. If the soil surface carries a uniform distribution pressure of 50 kN/m*. Determine the total Rankine active stresses on the wall and its positions. q-50 kN/m? Sand y= 20 kN/m Ø' = 20°arrow_forwardA 5 m high retaining wall is supporting the soil having properties as shown below: 5m $ = 30° c = 10 kN/m² Y=17.5 kN/m 3 The Rankine active earth pressure (per meter length) on the wall after the formation of tensile crack isarrow_forward
- Plot the vertical effective stress, the active Rankine lateral effective stress, the water pressure, and total pressures acting on the wall in the figure below. Also calculate the equivalent soil pressure, equivalent water pressure, and total equivalent pressure on the back of the wall and the location at which they act. Soil 1 Wall 1.5 m y=19 kN/m³ = 30° Soil 2 3 m y-20 kN/m³ -35° Soil 3 4 m 2.5 m y=21 kN/m³ = 38°arrow_forwardProblem 3 Determine the increase in vertical stress at a depth of 2m in the soil below point A due to the foundation shown below. The load due to the foundation is 100 kN/m². A. 5m 2marrow_forwardA retaining wall 6 m high with a vertical back face retains a homogeneous saturated soft clay. The saturated unit weight of the clay is 19.8 kN/m^3. Laboratory tests showed that the undrained shear strength, cu, of the clay is 14.7 kN/m^2. a. Do the necessary calculations and draw the variation of Rankine’s active pressure on the wall with depth. b. Find the depth up to which a tensile crack can occur. c. Determine the total active force per unit length of the wall before the tensile crack occurs. d. Determine the total active force per unit length of the wall after the tensile crack occurs. Also find the location of the resultant.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Principles of Foundation Engineering (MindTap Cou...Civil EngineeringISBN:9781337705028Author:Braja M. Das, Nagaratnam SivakuganPublisher:Cengage Learning
Principles of Foundation Engineering (MindTap Cou...
Civil Engineering
ISBN:9781337705028
Author:Braja M. Das, Nagaratnam Sivakugan
Publisher:Cengage Learning