Q.1
14 Marks(c)
List out various boring method and Explain wash boring method with neat sketch in details.
Gujarat Technological UniversitySummer 2025 examination
GTU 3150615 Soil Mechanics Summer 2025 Question Paper & PDF
B.E. · Civil Engineering · Semester 5 · Subject code 3150615
- 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. 4 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.2
14 Marks(a)
Define the term
i)Ultimate bearing capacity
ii)Net safe baring capacity
(c)
Explain in details Dynamic cone penetration test with neat sketch.
OR
(c)
The field N-value of Fully submerged Fine sand is 35 at 8 m depth. The avg. Saturated unit weight of sand is 19.5 kN/m³ Calculated Corrected N-Value as per IS 2131-1981.
Also asked in Winter 2025 Q3c, Summer 2024 Q2c
Q.3
14 Marks(b)
Write short note on Friction circle method.
(c)
A strip footing of 3m wide and founded at 2.5m depth below GL, in a soil having cohesion is 35 kN/m² and angle of internal friction is 35°. The water table is at a depth of 5m below GL. The moist weight of soil above water table is 18.00 kN/m³. Determine Safe bearing capacity and safe load per m length. Take FOS= 3. Use terzaghi’s theory and general shear failure. Take Nc=57.8, Nq= 41.4 and Nγ=42.4.
Also asked in Summer 2026 Q2c OR, Winter 2025 Q4c, Winter 2023 Q2c OR, Summer 2023 Q4c OR
OR
(a)
Write short note on Floating foundation.
(b)
A pile is driven with a single acting steam hammer of weight 45 kN with a free fall of 1.5m. The average penetration of the last 20 blow is 30 mm. find the Safe load using ENR formula.
Also asked in Summer 2026 Q4b
(c)
A drop hammer weighing 40 kN and having free fall of 75 cm drives an RCC pile of 30 kN. The average settlement per blow was 1.5 cm. The total temporary elastic compression is 2.0 cm. Assuming coefficient of restitution as 0.25 and FOS is 2.5, Determine ultimate bearing capacity and allowable load on pile.
Q.4
14 Marks(b)
Discuss merits and demerits of Plate load test.
(c)
Unconfined test is carried out on clay sample of 10 cm long and 5 cm in dia., fails under a load of 150 N at 10 % strain. Compute the shearing resistance also considers the effect of change in cross section of sample.
OR
(a)
Explain the concept of pressure bulb.
Also asked in Summer 2026 Q3a OR, Summer 2024 Q1a, Winter 2023 Q5b OR
(b)
Explain merits and demerits of Box Shear test.
(c)
An Road embankment is inclined on sides at angle of 30° to the horizontal. If the shear strength parameters are as c=20 kN/m² and ϕ=10° , Find factor of safety available against slope failure for 12m and 15m height . The unit weight of soil is 18 kN/m³.Take Sn=0.07.
Also asked in Summer 2026 Q4b OR, Summer 2024 Q3c OR
Q.5
14 Marks(a)
Define
i)Free swell index
ii)Swelling pressure
(c)
Explain procedure of direct shear test. Also explain its limitations.
Also asked in Summer 2026 Q4c OR
OR
(a)
Enlist various application area of Geosynthetics.
Also asked in Winter 2025 Q1b, Summer 2024 Q3a OR
(c)
Derive the Equation for Vertical stress under a line load using Baussinesq theory.
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About this paper
Official Gujarat Technological University (GTU) examination paper for Soil Mechanics (Summer 2025, 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.