Gujarat Technological UniversitySummer 2023 examination

GTU 3150615 Soil Mechanics Summer 2023 Question Paper & PDF

B.E. · Civil Engineering · Semester 5 · Subject code 3150615
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Total
70 marks
To pass
23 marks (33%)
Duration
2.5 Hours 2:30 PM – 5:00 PM
Questions
5 with internal choice
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10 of 25 questions on this paper were also asked in other years. 2 more are types of question GTU sets again with new data. Each is marked below with the years it appeared.See all 33 repeated 3150615 questions, most asked first

Q.1

14 Marks
(a)
3 marks

Define types of foundation. Explain various steps in selection of type of foundation for different structures.

(b)
4 marksAsked in 4 of 6 papers
Explain working principle of SPT test and its application.

Also asked in Winter 2025 Q4a, Summer 2024 Q3b OR, Winter 2023 Q3c

(c)
7 marks

Define subsurface investigation. Give various objectives and Planning for carrying out subsurface exploration. Explain any one type of geophysical exploration method used in field along with its applications.

Q.2

14 Marks
(a)
3 marks
Write critically note on Pile classification
(b)
4 marks
Explain the functions of
i)Batter pile
ii)Fender pile
iii)End bearing pile
iv)Friction pile
(c)
7 marks

Explain Negative skin friction for Cohesive Soil and Cohesion less Soil

(c)
7 marksAsked in 2 of 6 papers
Explain in detail plate load test

Also asked in Winter 2023 Q5c OR

Q.3

14 Marks
(a)
3 marksAsked in 3 of 6 papers
Explain Newmark’s influence Chart and its application.

Also asked in Winter 2025 Q3a, Summer 2025 Q5b OR

(b)
4 marks

Enlist theories regarding distribution of stresses in soil. Derive equation for stress distribution of soil under a point load as per Boussinesq’s theory.

(c)
7 marks

Explain causes of stress in soil. What is geostatic stress? What are different factors of safety used in the stability of slopes? Discuss briefly.

(a)
3 marksAsked in 3 of 6 papers
Discuss briefly, different types of slope failures.

Also asked in Summer 2026 Q5b, Winter 2023 Q5a

(b)
4 marksAsked in 2 of 6 papers
Explain Taylor’s Stability Number in relevant terms.

Also asked in Summer 2026 Q5c

(c)
7 marksAsked in 2 of 6 papers

How is a slope analyzed using a Swedish circle method (method of slices)? Discuss the method and derive an expression for the factor of safety.

Also asked in Winter 2023 Q4c OR

Q.4

14 Marks
(a)
3 marks

Explain the principle of the Direct shear test. What are the advantages of this test?

(b)
4 marksAsked in 3 of 6 papers

Enlist factor affecting the bearing capacity and explain any two in detail.

Also asked in Winter 2025 Q5b, Winter 2023 Q5c

(c)
7 marks

Define Safe, Allowable, Ultimate and net bearing capacity of soil. Write down Terzaghi’s bearing capacity equation in detail, its assumption and limitation of analysis

(a)
3 marks

What is the effect of increase in width of a footing on bearing capacity of a footing resting on (a) sand and (b) clay?

(b)
4 marksAsked in 2 of 6 papers
Critically explain effect of G.W.T. on bearing capacity of soil.

Also asked in Winter 2023 Q4b OR

(c)
7 marksSame type asked in 5 of 6 papers

A square footing has dimensions of 2mx2m and depth 2m. Determine its ultimate bearing capacity in pure clay with UCS of 0.15 N/mm², ɸ = 0° γ = 1.7g /cm³. Assume Terzaghi’s factor for ɸ = 0° as Nc =5.7, Nq=1.0, Nγ = 0.

Also asked in Summer 2026 Q2c OR, Winter 2025 Q4c, Summer 2025 Q3c, Winter 2023 Q2c OR

Q.5

14 Marks
(a)
3 marksAsked in 3 of 6 papers
Discuss the UU, CU, and CD triaxial shear test conditions

Also asked in Summer 2024 Q1b, Winter 2023 Q3a OR

(b)
4 marks

Explain the principle of the Direct shear test. What are the advantages of this test?

(c)
7 marksSame type asked in 2 of 6 papers
Following are the results obtained from box shear test on soil:

Normal Stress (kN/m²) : 25, 75, 150, 250 Shear Stress (kN/m²) : 60, 80, 105, 145 Plot graph and determine the shear values C and ɸ of soil. If a specimen of same soil is tested in triaxial test, estimate the deviator stress (σd) at which the sample will fail when cell pressure (σ3) is 100 kN/m²

Also asked in Summer 2026 Q3c

(a)
3 marks
Different between shallow foundation and deep foundation.
(b)
4 marks

Explain the concept of ‘Pressure bulb’ and its use in soil engineering practice. Draw contact pressure distribution diagram for flexible and rigid footings on sand and clayey soil.

(c)
7 marksAsked in 3 of 6 papers

Define ‘GEOSYNTHETICS’. Classify the geosynthetic materials and explain any two of them with neat sketch.

Also asked in Summer 2024 Q4b OR, Winter 2023 Q3c OR

More Soil Mechanics papers

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About this paper

Official Gujarat Technological University (GTU) examination paper for Soil Mechanics (Summer 2023, B.E. · Civil Engineering, Sem 5). Features complete 70-mark regular & remedial examination pattern, official marking distribution across all 5 questions, and direct 1-click official PDF download.

Transcribed for student exam preparation from Gujarat Technological University official examination archives. Questions, syllabus guidelines, and curriculum marking schemes remain the intellectual property of Gujarat Technological University.

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