Civil Engineering - Soil Mechanics and Foundation Engineering - Discussion


The lateral earth pressure on a retaining wall

[A]. is equal to mass of the soil retained
[B]. proportional to the depth of the soil
[C]. proportional to the square of the depth of the soil
[D]. proportional to the internal friction of the soil
[E]. none of these.

Answer: Option D


No answer description available for this question.

Niraj said: (Jun 8, 2013)  
P = 0.5kwh^2.

k = lateral earth pressure coefficient.
w = soil density.
h = ht of soil retained.

Susmita said: (Jul 25, 2014)  
I think answer B is also right, cause from the formula we know that p=k*y*z. So lateral earth pressure is also proportional with z means height.

Bob Rat said: (Aug 13, 2014)  
@Susmita, you are correct. Answer is B is also possible. This depends on what theory you use for calculating the lateral earth pressure. Either Rankine or Coulomb.

Viru said: (Oct 17, 2014)  
How it is internal friction?

Subinsekhar said: (Nov 19, 2014)  
I think internal friction remains as a constant. When depth of soil increases, pressure also increases.

Kishan said: (Mar 5, 2015)  
As we know,

P = 0.5 kwh^2.

From above P is directly proportional to square of height. So I think option C is right.

Ankur said: (Apr 4, 2015)  
Answer B is right because lateral pressure of the earth varies with the height of the soil.

Prudhvi Karri said: (Jun 5, 2015)  
I think B and D are right because p = k*w*h, so p is proportional to depth and co-efficient of lateral earth pressure in this k = 1-sin (pi).

So k depends on internal friction then pis also directly proportional to internal friction.

Suraj said: (Jul 15, 2015)  
Answer B is not right because intensity is proportional to h not total stress.

Zatak said: (Jul 17, 2015)  
p = kwh. So p is proportional to h directly. And k, that's (1-sinφ)/(1+sinφ).

How on the earth proportional to internal friction φ?

Bintu said: (Jan 26, 2016)  
Because the earth pressure coefficient is n also equal to 1-sin^2%/1+sin^2&.

Atul said: (Feb 10, 2016)  
The lateral earth pressure act at h/3 from toe of the wall, and which is p = 0.5*kh^2* unit weight. So answer is C.

Bharatram Mehar said: (Mar 24, 2016)  
But ranking theory not considered friction.

Only Coulomb theory considered friction.

So how can say that [D] answer right?

Soumyashekhar said: (May 15, 2016)  
I think the option B is also the correct one.

Lateral Earth pressure p = k * w * z.

Biswajit said: (May 30, 2016)  
There are two things one is pressure intensity and the other is total pressure. Intensity is proportional to the depth of soil and the total pressure is proportional to the square depth of soil.

Sivunnaidu said: (Jul 4, 2016)  
Lateral Pressure proportional to depth. If it is lateral Pressure force it is proportional to Square of depth.

Harpreet Singh said: (Jul 19, 2016)  
Answer c is correct because P =.5kwh^2.

Jcr said: (Aug 11, 2016)  
I think the answer B is correct.

Hail Hydra_Ulics said: (Aug 18, 2016)  
@Harpreet Singh,

P = 0.5 kwh^2, in this formula P, is lateral pressure force per running meter length of the wall, lateral pressure is proportional to depth and angle of internal friction as well.

Karan Panjabi said: (Nov 11, 2016)  
The Correct option is C.
Because P = 0.5 * kwh^2 , so there is no relation with the internal friction.

Madhu said: (Nov 30, 2016)  
I think B is the right answer.

Komal Joshi said: (Dec 22, 2016)  
@Karan Panjabi.

Your formula is for total force not for pressure and formula for pressure is k * w * h.

Baloch said: (Dec 29, 2016)  
lateral E.P = h^2.

The answer is C.

Saily said: (Jan 14, 2017)  
I think B is the correct answer.

Javed said: (Feb 5, 2017)  
It depends upon internal friction (because "ka" depends upon the angle of int friction) +it is proportional to square of depth, so both are right.

Ranjan Patra said: (Feb 6, 2017)  
C is right because lateral pressure means here total pressure.

Hemant Bishnoi said: (Feb 12, 2017)  
I think answer B is correct.

Santhoshkumar said: (Mar 9, 2017)  
I think B is correct because the lateral pressure is depends on height or point of application of pressure on the retaining wall.

Ankur Tomar said: (Apr 30, 2017)  
Lateral earth pressure is horizontal earth pressure.

We know k is lateral pressure/vertical pressure;
K= 1- sin(fi) /1+sin(fi)
Where fi is angle of internal friction.
Kwh is pressure intensity.
And o.5kwh2 is total pressure per metre length.
Hence lateral pressure proportional to the angle of internal friction.

Pankaj said: (Sep 7, 2017)  
I think option C is correct.

Vimal Singh Patel said: (Sep 8, 2017)  
No, the friction coefficient of THE homogeneous soil is constant so is proportional ON height.

Avinash said: (Oct 6, 2017)  
B is correct, they not mentioned about total pressure in that case answer is C, but they gave answer D don't know how it proportional internal friction, but may be possible.

Hariom Saini said: (Oct 20, 2017)  
I think C is correct bacause it is not total pressure only lateral pressure.

Udaya said: (Nov 22, 2017)  
C must be the answer.

Pradipto Sarkar said: (Nov 29, 2017)  
The given answer is correct. Because in the formula 'h' means height of the soil retained by the wall but the alternatives says only the height of the soil.

Selvaganapathy said: (Dec 13, 2017)  
Answer B is correct.

Avinash K K said: (Dec 14, 2017)  
In the question they asked lateral earth pressure not total pressure so, pressure p=co-efficient (k) *vertical stress (unit weight of soil (&gama;) * depth of soil).

From this equation, Pressure P is proportional to both K and depth of soil. Hence option B and D are correct.

Pradipto Sarkar said: (Dec 25, 2017)  
Very nice, Thanks @Avinash.

Loki said: (Jan 20, 2018)  
It is independent of the depth option B was wrong it depend upon the internal friction and cohesion only.

Anir said: (Feb 14, 2018)  
Lateral pressure =kwh where w=unit wt.
But force=.5kwh^2.

Soumen said: (Feb 19, 2018)  
Option C is the right answer.

Yash said: (Feb 24, 2018)  
Lateral earth pressure means horizontal pressure. So it is Ka*H which is answer b. But if it was asked total earth pressure then answer would be C.

Rabindra said: (May 1, 2018)  
I think the answer is option E.

Mohammad Nasir said: (May 3, 2018)  
I think the right answer is B. Because it depends upon the depth of soil.p=ka*γ*h.

Swapnil Raut said: (May 10, 2018)  
C is the correct answer.

Aaqib Xargar said: (May 15, 2018)  
P=1/2ka γ h^2.

So, lateral earth pressure is directly proportional to the square of the depth of the soil.

Yashwant Meena said: (Aug 27, 2018)  
Option D is correct. I agree with the given answer.

Uttu said: (Nov 1, 2018)  
According to me, C is the correct answer.

Sandeep said: (Dec 21, 2018)  
Option c is right, because it asks about pressure, not pressure intensity.

Adwaya K Sarkar said: (Feb 27, 2019)  
I think the correct is E.

Rajashri said: (Feb 28, 2019)  
It's correct.

Lateral earth pressure means horizontal earth pressure, which is proportional to phi in rest, active and also in the passive state both in Rankine's and Columb's theory.

@Rest=1-sin π.

And @passive = 1+sin&π/1-sinπ.

Tanoy said: (May 5, 2019)  
I think C is the right answer.

Amit said: (Jul 5, 2019)  
Here, option B for pressure.

And C for force.

Rahul said: (Jul 26, 2019)  
The magnitude of the lateral earth pressure depends upon the movement of the retaining wall relative to the backfill and upon nature of the soil.

Sashikanta Mohapatra said: (Aug 12, 2019)  
Please explain the right answer.

Rishi said: (Aug 25, 2019)  
Answer C is right.

Directly proportional to the square of depth.

Skn said: (Nov 21, 2019)  
The option should be C follow Gupta & Gupta having the same question their also.

Ankur Sharma said: (Nov 29, 2019)  
B is the only correct option.

Opse Aee said: (Dec 12, 2019)  
The correct answer is C.

Er.Shubham Powar said: (Jun 15, 2020)  
I think the answer given here is right,

See the problem here, asks about lateral pressure that is major stress and not active or passive earth pressure intensities. As per Bell's Formula on stresses,

P1 = P3* tan^2(α) + 2C*tan(α)

Hence here P1 i.e. Lateral Stress is directly proportional to the angle of internal friction.

Laxmi Nepal said: (Aug 25, 2021)  
C is the correct answer.

Don said: (Sep 21, 2021)  
According to me, the right C.

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