MCEGS105-1 Soil Exploration & Field Testing M.Tech Model Question Paper : mgu.ac.in

Name of the College : Mahatma Gandhi University
Department : Civil Engineering
Subject Code/Name : MCEGS 105-1/ADVANCED DESIGN OF CONCRETE STRUCTURES
Sem : I
Website : mgu.ac.in
Document Type : Model Question Paper

Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/mgu.ac.in/5006-MCEGS%20105-1%20SOIL%20EXPLORATION%20AND%20FIELD%20TESTING%20-1.pdf

Soil Exploration & Field Testing :

M.TECH. DEGREE EXAMINATION :
Model Question Paper – I
Branch: Civil Engineering

Related : MGU MCEGS104 Advanced Design of Concrete Structures M.Tech Model Question Paper : www.pdfquestion.in/5005.html

Specialization: Geomechanics and Structures
First Semester
MCEGS 105-1 : SOIL EXPLORATION AND FIELD TESTING
(Regular – 2013Admissions)
Time : 3 Hours
Maximum: 100 Marks
Answer all questions :
1 (a) Propose a comprehensive site investigation programme for a multistoried building complex. Explain how it differs from an earth dam project. (12 marks)

(b) Can geophysical investigations replace a program of boring and sampling. Give reasons for your answer. (7marks)
(c) Distinguish between resistivity mapping and resistivity sounding (6marks)
OR

2 (a) Find the velocity of compression wave and depth of change in layer from the following data obtained during seismic refraction test
Distance of geophones (m) 20 30 40 60 800 1000 1200
Time taken by waves(min) 33 50 66 100 450 500 550 (9 marks)

(b) Discuss possible ways of disturbances while collecting an undisturbed sample and remedial measures to minimize such disturbances (10marks)

(c) What is the effect of sample disturbance on the test results of clay in the following tests
(i) Compression Index
(ii) Shear strength parameters
(iii) Shear modulus (6 marks)

3. (a) State whether the following statements are true or false. Justify your answers with reasons
(i) SPT values are over estimated when casing pipe is overdriven
(ii) SPT values are over estimated when the bore hole diameter is too large compared to the size of the split spoon sampler (4×2=8marks)

(b) Explain pressure meter tests. Also give limitations of this method. (9 marks)
(c) Write explanatory notes on (i) Dilatometer test (ii) Borehole shear test (8 marks)
OR

4 (a) Where one will recommend field vane shear test. Explain how SBC can be arrived from field vane shear test. (8marks)
(b) Describe the functioning of static cone penetrometer. How can the results of the test be used in computation of pile capacity. (8marks)

(c) Explain any two field test for determining the dynamic properties of soil. (9marks)
5. (a) Explain the procedure to determine water table in a borehole. (7marks)

(b) Distinguish between: Boring log and soil profile (8marks)
(c) How can the results of a static cone penetration test be used for foundation design
(10marks)
OR

6. (a) Explain the methodology of back analysis to analyze geotechnical failures. (10marks)
(b) Explain the dynamic cone penetration test and give correlation with SPT value. (9marks)
(c) Explain different types of core retainers (6marks)

7 (a) The following readings were obtained from a pile load test on a pile of 500mmdiameter.
Estimate the safe load as per IS standards
Load (kN): 450 810 1400 1600 1800 2000 2200 2400
Settlement (mm): 6.2 12.2 18.8 22.2 31.2 43 64.2 82.2
(9 marks)

(b) Explain briefly about the investigation using drill ship (8 marks)
(c) Differentiate between onshore site investigation and offshore site investigation (8 marks)
OR

8. (a) Explain the steps involved in offshore investigation (8 marks)
(b) Write a note on cyclic pile load test (9 marks)
(c) Write notes on geotechnical instrumentation for measuring displacement in the field.
(8 marks)

M.Tech. Degree Examination :
Model Question Paper – II
Branch : Civil Engineering
Specialization : Geomechanics and Structures
First Semester
MCEGS 105-1 Soil Exploration And Field Testing : (Regular – 2013Admissions)
Time : Three hours
Maximum : 100 Marks
Answer all questions
1 (a) A three-story steel frame office building is to be built on a site where the soils are expected to be of average quality and average uniformity. The building will have a 30mX30m footprint and is expected to be supported on spread footing foundations located about 1 m below the ground surface.

The site appears to be in its natural condition, with no evidence of previous grading. Bedrock is several hundred feet below ground surface. Determine the required number and depth of borings. (6 marks)

(b) Describe different types of soil samplers and situations where each is used indicating its advantages and disadvantages. (12 marks)
(c) Write a note on sampling of cohesionless soil. . (7 marks)
OR

2 (a) Piston sampler is considered to be very good method of sampling in soft clays. What are the features of this sampler which are specially designed for minimizing disturbance. (9marks)

(b) What are the precautions to be taken for the preservation and handling of samples. (6marks)
(c) What are the conditions favouring seismic refraction and electrical resistivity method. Briefly explain the methods.