Underground Construction B.E Question Paper : jaduniv.edu.in
Name of the University : Jadavpur University
Department : Construction Engineering
Degree : B.Tech
Subject Name : Underground Construction
Year/Sem : IV/II
Website : jaduniv.edu.in
Document Type : Model Question Paper
Download Model/Sample Question Paper :
2008 : https://www.pdfquestion.in/uploads/dspace.jdvu.ac.in/6454-2008Underground%20Construction%20(S).pdf
2011 : https://www.pdfquestion.in/uploads/dspace.jdvu.ac.in/6454-2012Underground%20Construction.pdf
Underground Construction Question Paper :
B. Construction Engg. Final Examination, 2008 :
(2nd Semester)
Time : Three hours
Full Marks : 100 (50 marks for each part)
Use a separate Answer-Script for each part.
Related : Jadavpur University Process of Construction B.E Question Paper : www.pdfquestion.in/6452.html
PART–I :
Answer any two questions. :
1. Find the depth of embedment below the dredge line and anchor rod force for the shut pile shown in figure – 1. Use a 30% increase applied to the computed embedment length. 25
2. Write short notes on :
i) Dewatering by SUMPS. 10
ii) Ground settlement in sandy strata. 15
3. a) State the different factors on which the cost of a dewatering project depends. 4
b) Draw a sketch showing typical connection details of shut pile, waling, anchor rod etc. 6
c) Briefly discuss the construction sequence of shut pile walls. 5
d) Write a short note on cellular cofferdams. 10
PART–II :
Answer any two questions. :
4. a) A braced excavation is to be made in a subsoil as given in Fig. -2 having 12 m width and 8.0 m deep check the stability of cut against base failure bottom Heave and clay bursting. 17
b) Briefly describe the type of earth pressure variation in braced cut. 8
5. Write notes on following : 5×5=25
a) Ditch Conduct
b) Negative Projecting Conduct
c) Bottom Heave
d) Diaphragm Wall
e) Shutting and Lagging
6. a) Explain the advantages of arching phenomenon. 7
b) Differentiate the shallow and deep tunnel. 8
c) Describe the factor on which adjoining ground settlement is dependent in deep excavation. 10
Bachelor Of Construction Engg. Examination, 2012 :
(4th Year, 2nd Semester)
Underground Construction :
Time : Three hours.
Full Marks : 100
(50 marks for each part)
Use a separate Answer-Script for each part. :
PART – I :
Answer any two questions. :
1. (a) A 12.0m deep braced excavation, 40m x 40m in plan, is to be made in a sub-soil consisting of 20.0m of medium sand overlying hard clay. The ground water table is 3.0m below ground level and it is to be lowered to at least 1.50m below the bottom of excavation. What will be the average discharge of the dewatering system in liters/hours? Assume k=2.5 x 10–2 cm/sec. 10
(b) Describe the process of construction of Diaphragm walls. 10
(c) State the different uses as well as advantages of Diaphragm walls. 5
2. Find by free earth support method the depth of embedment below the dredge line for the anchored sheet pile shown in Fig A. Use a 30% increase applied to the computed embedment length. Also find the anchor rod forces. 25
3. Write short notes on :
(a) Ground settlement in clayey strata. 10
(b) Dewatering by well point method. 15
PART – II :
Answer any two questions.
4. (a) Explain Terzaghi’s General Wedge theory for earth pressure in cuts in cohesionless soil. 15 (b) Describe various types of bracing system used for deep and shallow ent. 10
5. (a) A tunnel section has been shown below. Find out the load on the roof and wall of the tunnel considering arching and compare such load reduction if arching would have not been considered. 12
(b) Explain the principle of load determination on the top of a Ditch Conduct. 8
(c) Explain settlement ratio. 5
6. (a) A braced ent is to be made in a sub-soil profile as given below. The ent is 12m deep and 16m wide. 20
(i) Design suitable penetration of diaphragm wall
(ii) Is the ent safe against clay brushing? If not recommend suitable remedial measure.
(iii) Draw the apparent earth pressure diagram on the wall.
(iv) If the allowable shut load is 140 ton then find out suitable vertical and horizontal spacing of shuts.
(b) Explain why the adjacent structure to a deep cut is prove to damage and distress. 5