Question

Please explain why high pore-water pressures reduce friction along the base of a retaining wall footing.

Please explain why high pore-water pressures reduce friction along the base of a retaining wall footing.

Engineering   Civil-Engineering   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Retaining wall is constructed or designed to hold the wedge of soil or from the lateral earth pressure of soil. The pressure which comes from the groundwater below the retaining wall footing is called pore water pressure. Due to pore water ( as water acts as a viscous liquid) the soil beneath the footing reaches its saturation level and molecular force between the soil particles and the base of the footing is reduced, as a result angle of internal friction is reduced and the friction along the base of footing reduce. In this way, pore water pressure refuces the friction.

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
For the 8m high retaining wall, the top layer is sand with internal friction angle Ø=25°...
For the 8m high retaining wall, the top layer is sand with internal friction angle Ø=25° and unit weight is 18.2 kN/m3 and the bottom layer is gravel with internal friction angle Ø=33° and unit weight is 21.8 kN/m3 . There is no cohesion in both of the soil layers. Calculate the thrust per meter length of the wall Pa and draw the lateral earth pressure diagram.
A retaining wall 30 m high was designed to stabilize a horizontal ground surface. The back...
A retaining wall 30 m high was designed to stabilize a horizontal ground surface. The back of the wall is inclined 15 degrees to the vertical direction and can be assumed rough with interface friction angle of 30 degrees. (a) Draw a diagram to show the given wall dimensions, relevant inclinations, and the direction of the active force on the wall. (b) Calculate the lateral force on the wall assuming the groundwater table is at the base of the wall....
Determine the total force per unit length acting on a 4.8 m high retaining wall. The...
Determine the total force per unit length acting on a 4.8 m high retaining wall. The soil that is backfilled level behind the wall is a granular soil with a total unit weight of 18.2 kN/m3 and a saturated unit weight of 19.6 kN/m3. Use an at-rest earth pressure coefficient for the soil which has an internal angle of friction of 26 degrees. The water table is expected to rest at a depth of 1.5 below the ground surface. Report...
A 6.3 m high retaining wall supports a 4.5 m soil backfill having a cohesion of...
A 6.3 m high retaining wall supports a 4.5 m soil backfill having a cohesion of 25 kPa and an angle of internal friction of 30 ̊. The soil backfill was subjected to a laboratory test it was found out that it has a moist volume of 0.01055 m3, a moist weight of 0.1935 kN. After oven drying, it has a weight of 0.1668 kN and from analysis it has a combined volume of air and water of 0.004477479 m3....
An attacker at the base of a castle wall 3.85 m high throws a rock straight...
An attacker at the base of a castle wall 3.85 m high throws a rock straight up with speed 8.30 m/s from a height of 1.45 m above the ground. (a) Will the rock reach the top of the wall? yes/no (b) If so, what is its speed at the top? If not, what initial speed must it have to reach the top? (c) Find the change in speed of a rock thrown straight down from the top of the...
1. Explain why water, with its high specific heat capacity, is utilized for heating systems such...
1. Explain why water, with its high specific heat capacity, is utilized for heating systems such as hot-water radiators. 2. A heated fruit pie often seems to have filling that is warmer than the crust. is this? What can you conclude about the specific heat of the filling and the crust? please answer both using your own words
Explain why the vapor pressure of water in equilibrium with liquid water is temperature dependent? Please...
Explain why the vapor pressure of water in equilibrium with liquid water is temperature dependent? Please show all work with the correct answer. Thank you!!
Why O2 and CO2 are soluble in water? Can you please explain?
Why O2 and CO2 are soluble in water? Can you please explain?
How do you relate the most to this story and why? In two strong paragraphs, explain...
How do you relate the most to this story and why? In two strong paragraphs, explain what it is about the tone and/or imagery of the story that speaks to you and why. Use some text examples to support your response Hills Like White Elephants (1927) The hills across the valley of the Ebro1 were long and white. On this side there was no shade and no trees and the station was between two lines of rails in the sun....
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT