b.tech. degree examination, dec 2013 (examination · pdf filefind the maximum positive and...

(DCE311) B.Tech. DEGREE EXAMINATION, DEC 2013

(Examination at the end of Third Year Third Semester)

CIVIL ENGINEERING

Paper - I : STRUCTURAL ANALYSIS - I

Time : 3 Hours Maximum Marks : 75

Answer question no.1 compulsory

Answer ONE question from each unit

1) a) Define Virtual work method.

b) What is static degree of indeterminacy?

c) Draw the S.F diagram for fixed beam with point load 'w' at half span of the beam.

d) What is point of Contra flexure?

e) Write the formula for fixed end moments for a symmetrically loaded fixed beam.

f) What is distribution factor?

g) What is the strain energy stored by two-hinged portal frame subjected an external load

system.

h) Define stiffness of a member.

i) Write two disadvantages of fixed beams.

j) Draw the B.M diagram for fixed beam with point load 'w' at half span of the beam.

k) Define effect of sinking of supports in fixed beams.

l) What is a Composite structure?

m) What is meant by prop?

n) State Castigliano's second theorem.

o) Define Maxwell reciprocal theorem.

UNIT-I

2) a) State and explain Castigliano's first theorem.

b) Find the deflection at the centre of a beam of span l carrying a uniformly distributed

load of w per unit run over the whole span. Assume uniform flexural rigidity.

(OR) 3) a) Explain Maxwell's reciprocal deflection theorem.

b) Define Betti's law. Derive the expression for the total work done when both the systems

of forces are present on the structure.

UNIT-II

4) Two Wheel loads 80 KN and 200 KN, spaced 2m apart move on a girder of span 16 meters.

Find the maximum positive and negative shear force at a section 4 meter from the left end

and also find BM that can occur at 6m from the left end. Any wheel load can lead the other.

Use ILD method.

(OR)

5) a) What are the uses of an Influence line diagram.

b) Derive and draw the ILD for the BM at a given section.

c) Draw the ILD for reactions at the supports.

UNIT-III

6) A fixed beam of 6nm span is loaded with point loads of 150 KN at a distance 2 m from each

support. Draw the bending moment and shear force diagrams. Find also the maximum

deflection Ixx = 8 × 10mm4 and E = 2x108kN/m2.

(OR)

7) A cantilever beam AB of length 6m is fixed at A and propped at end B. It carries a point load

50kN at mid span. Level of the prop is the same as that of the fixed end.

Determine:

(i) Reaction at the prop,

(ii) Draw shear force and bending moment diagrams.

UNIT-IV

8) a) Mention the important differences between Statically determinate and indeterminate

structures.

b) A beam AB 4 meter long is fixed at A and simply supported at B. It carries a point load

of 16 kn at a distance of 1 meter from B. Determine the reactions at the support and

draw B.M. and S.F. diagrams.

(OR)

9) A horizontal prismatic beam AB of span l is fixed at its ends A and B. If the right end B of

the beam settles down by find the reacting force and reacting moment of each end of the

beam.

* * * *

(DCE312)

B.Tech. DEGREE EXAMINATION, DEC 2013


Civil Engineering

Paper - II : ENVIRONMENTAL ENGINEERING-I


Answer question no.1 compulsory

Answer ONE question from each unit

1) Explain the following:

a) Per capita consumption. (2)

b) Canal intake. (2)

c) Transportation. (2)

d) Water borne diseases. (2)

e) Sedimentation. (2)

f) Filter. (1)

g) Disinfection. (2)

h) Sluice valve. (2)

UNIT-I (4×15=60)

2) a) Explain the role of environmental engineers?

b) Describe factors affecting percapita consumption?

(OR)

3) a) Explain the classification of sources of water supply?

b) Write short notes on canal intakes?

UNIT-II

4) Explain the following:

a) Types of conduits

b) Quality of water

c) Water borne diseases

(OR)

5) a) Explain the stoke's law?

b) Describe the sedimentation and coagulation?

UNIT-III

6) a) Explain in brief the different methods of disinfection?

b) Explain in detail lime-soda process in water softening?

(OR)

7) a) Write notes on troubles in rapid sand filters?

b) Explain the removal of colour, odour and taste from water?

UNIT-IV

8) Explain the following?

a) Capacity of balancing tank

b) Analysis of distribution system

c) Hydrants

(OR)

9) a) Write a short notes on sanitary fittings?

b) Explain the plumbing system of drainage?

* * * *

(DCE 313)

B.Tech DEGREE EXAMINATION, DEC. - 2013


Civil Engineering

Paper - III : WATER RESOURCES ENGINEERING-I


Answer Question No. 1 compulsory. (15)

Answer ONE question from each unit. (4 x 15 = 60)

1) a) Define laterals.

b) What are the different types of soils?

c) Write different types of furrows.

d) Define delta.

e) Give any two factors affecting duty.

f) Define Precipitation.

g) What is Culturable command area?

h) Define Foote module.

i) Write different types of lining.

j) What is a land drainage?

k) Define Canal regulators.

l) What are head regulators?

m) Define hydrograph.

n) What is a Aquifer?

o) Define Aquifuge.

Unit-I

2) a) Define Unit Hydrograph and also write the assumptions of Unit

Hydrograph Theory.

b) Write different steps for construction of Unit Hydrograph.

OR

3) a) Explain about different types Aquifers.

b) Explain Dupuit’s theory and its limitations.

Unit-II

4) a) Explain in detail the various steps involved in the planning and

development of a water resources project.

b) Distinguish between sprinkler irrigation system and drip irrigation system.

OR

5) a) Explain about the classification of irrigation water.

b) Explain about classes and availability of soil water with neat sketch.

Unit-III

6) a) Explain about Lacey’s regime theory and derive its equation.

b) Write the advantages and disadvantages of lining of irrigation channels.

OR

7) Explain about Kennedy’s theory of silt supporting capacity and its drawbacks.

Unit-IV

8) a) Explain about the component parts of a diversion headwork with neat

sketch.

b) Write about the causes of failure of weirs and their remedies.

OR

9) a) Write the different types of falls and also mention its necessity and

location.

b) Explain about the development of falls.

● ● ● ● ●

(DCE 314)

B.Tech. DEGREE EXAMINATION, DEC - 2013

(Examination at the end of Third Year)

CIVIL ENGINEERING

Paper - IV : DESIGN OF CONCRETE STRUCTURES - I

Time : Three hours Maximum : 75 marks

Answer ONE question from each Unit.

UNIT - I

1) A doubly reinforced rectangular beam is 300mm x 450mm and is subjected to a bending

moment of 90 KN-m. If the limiting stresses in concrete and steel are 5N/mm2 and

140 N/mm2, determine the steel areas. Assume that steel is buried on both faces, with its

centre 40mm from either face. Take M = 18 [WSM].

(Or)

2) An isolated T-beam has a flange width of 1000mm, flange thickness of 80mm and effective

depth of 400mm. The rib is 240mm wide and reinforced with 5 bars of 20mm diameter.

Determine the moment of resistance of the section, if the permissible stresses in concrete

and steel are 5.2 N/mm2 and 140 N/mm2 and M=18. Neglect the compressive force in the

web. The beam is simply supported over a span of 4m. [WSM]

UNIT - II

3) a) Explain stress-strain relationship for concrete ?

b) Explain stress-strain relationship for steel ?

with neat sketches.

(Or)

4) Design a rectangular beam to resist a bending moment equal to 45 KNM using

(i) M15 mix and mild steel

(ii) M15 mix and Fe 415 grade steel [LSM]

UNIT - III

5) A simply supported beam is 25cm by 50cm and has 2-20mm TOR bars going into the

support. If the shear force at the centre of support is 110KN at working loads, determine

the anchorage length. Assume M20 mix and Fe 415 grade TOR steel. [LSM]

(Or)

6) A simply supported beam having 5m span is 400mm x 650mm in cross-section. Bending

moment at the mid span is 300 KNM out of which 40% is due to permanent loads. Calculate

the design surface crack width.

(i) under a bar on the tension face,

(ii) at a point on the tension face midway between two bars,

(iii) at bottom corner [LSM]

UNIT - IV

7) Design a simply supported reinforced concrete beam, carrying a superimposed load of

20KN per metre run over a clear opening of 6m. In addition to this the beam carries two

concentrated loads of 30KN. Each at a distance of 1.5m from the face for each support.

The width of supporting wall is 60cm. Use M15 concrete and Fe 415 steel. [WSM]

(Or)

8) Design a dog-legged stair for a building in which the vertical distance between floors is

3.6m. The stair hall measures 2.5m x 5m. The live load may be taken as 2500 N/m2. Use

M15 concrete, and HYSD bars. [WSM]

UNIT - V

9) Design an inverted T-beam roof for a hall 6m wide and 15m long to support a dead load of

intensity 2.5 KN/m2 and a live load of intensity 1.5 KN/m2. Use M15 mix and Fe 415

grade steel. [LSM]

(Or)

10) Design a rectangular beam for an effective span of 6m.The superimposed load is 50 KN/m

and the size of beam is limited to 30cm x 60 cm overall. Use M15 mix, Fe 250 grade steel,

and support width = 300 mm each. [LSM]

* * * *

(DCE 315 )

B.Tech. DEGREE EXAMINATION, DEC. - 2013


CIVIL ENGINEERING

Paper - V : DESIGN OF STEEL STRUCTURES-I


Answer any five questions

All questions carry equal marks

Unit -I

1) State the assumptions in theory of riveted joints in detail.

OR

2) Design a tension member using a channel section to carry an axial tension of

220 KN.

Unit -II

3) A bracket plate 12mm thick transmits a load of 200KN at an eccentricity of

25cm to a column section SC 250 through 14-22mmφ PDSR arranged in two

vertical rows 10cm apart. The pitch of rivets is 8cm and the load lies in the

plane of rivets. Check the safety of the joint.

OR

4) Design a column of 10m long to carry a factored axial load of 1100KN. The

column is retrained in position but not in direction at both the ends. Design a

batten system for the columns . Assume that the channels are kept back to

back.

Unit -III

5) An ISA 65x65x10mm carries a tensile load of 160kn. The angle is to be

welded to a gusset plate. Find out the length of welds required at the heel and

toe of the angle. Take permissible stress in weld as 110 MPa.

OR

6) A tie member consisting of 2 ISA 100x100x10 is connection to the same side

of a gusset plate. Estimate the safe load carrying capacity of the tie, if fy is 250

MPa.

Unit -IV

7) A flexural member is made of section ISBM 600 @ 122.6kg/m. The effective

span (simply supported) of the member is 10m. The compression flange is not

held against lateral buckling. Estimate the load carrying capacity (UDL) of the

member.

OR

8) Design a simply supported beam having an effective span of 10m carrying a

UDL of 40KN/m. The beam is laterally supported. Take fy=250Mpa. And

E=200 GPa.

Unit -IV

9) A 9m high column hinged at both ends is subjected to two eccentric loads. One

is 105KN at 5m above base with eccentricity of 200mm and the other is 200kN

at 7.5 m above base with an eccentricity 200mm. Design a suitable Beam-

Column.

OR

10) A beam ISLB 500 @ 75kg/m transmits an end reaction of 190kN and an end

moment of 35KN-m to the flange of ISHB 350 @ 67.4kg/m. Design a moment

resistant split beam with riveted connection.

� � �

(DCE 316)

B.Tech. DEGREE EXAMINATION, DEC. 2013


Civil Engineering

Paper – VI : GEO-TECHNICAL ENGINEERING-1


Answer Question No.1 compulsory [15]

Answer One question from each unit [4 x 15 = 60]

1) a) What is Permeability ?

b) Define consolidation.

c) State the Stokes Law.

d) Define Compaction.

e) Give the validity of Darcy’s law by Reynold’s number.

f) What do you understand by quick sand conditions ?

g) Draw the 3 phase diagram in terms of void ratio.

h) What is shrinkage limit ?

i) What are the factors affecting Permeability ?

j) What is field consolidation curve ?

k) Define is seepage.

l) Differentiate between cohesive and non cohesive soils. Write the

importance of Mohr’s circle.

m) What are the methods adopted to find the field density of soil ?

n) Differentiate between void ratio and porosity.

o) What is the use of classification of soils ?

UNIT - I

2) a) Discuss about five major soil groups of India.

b) Derive the relationship between dry unit weight, bulk unit weight and water

content.

c) An earthen embankment under construction has a bulk unit weight of

16kN/m3 and a moisture content of 10%. Compute the quantity of water in

litres required to be added per cubic metre of earth to raise the moisture

content to 14% at the same void ratio.

OR

3) a) Differentiate between:

i) Percentage air voids and air content.

ii) Void ratio and porosity.

iii) Specific gravity of solids and mass specific gravity.

iv) Submerged density and saturated density.

b) For a uniformly graded sandy soil with soil grains are in spherical shape

determine the maximum void ratio and porosity of the soil.

UNIT – II

4) a) How will you determine moisture content of soil sample by pycnometer method?

b) Draw a typical plasticity chart used in I.S. classification system. Show the

different soil groups on the chart.

OR

5) a) Explain the phenomena of capillarity and surface tension.

b) Discuss the factors affecting the permeability of soils. State the limitations of Darcy’s

law.

UNIT – III

6) a) Derive the principle of construction of Newmark’s chart and explain its use.

b) What are the uses of Newmark’s influence chart ? Discuss in detail.

OR

7) a) Bring out the differences between I.S. light and Heavy compaction tests.

b) Define compaction of soils and list out the various factors that influence the

compaction of soils.

UNIT – IV

8) a) Describe a method to determine the pre-consolidation pressure of soil and

explain its significance.

b) The settlement analysis of a proposed structure indicates that 6cm of

settlement will occur in 3 years and the ultimate total settlement will be

about 25cm. The analysis is based on the assumption that compressible clay

layer is drained at both its top and bottom surfaces. However it is suspected

that there may not be drainage at the bottom surface. For the case of a

single drainage, estimate.

i) The ultimate total settlement and

ii) The time required for 6cm of settlement

OR

9) a) Explain the basic differences between a box shear test and triaxial shear test

for soils.

b) A cylinder of soil fails under an axial vertical stress of 200 kPa when it is

laterally unconfined. The failure plane makes an angle of 490 with the

horizontal. Find the values of cohesion and angle of internal friction i)

analytically and ii) by drawing Mohr’s circle.

��

(DCE321) B.Tech. DEGREE EXAMINATION, DEC. - 2013

(Examination at the end of Third Year Fourth Semester)

Civil Engineering

Paper - I : STRUCTURAL ANALYSIS - II


Answer Question No. 1 compulsory. (15)

Answer ONE question from each unit. (4×15 = 60)

1) a) Why a slope deflector method is so called?

b) What is a degree of freedom?

c) Define member stiffness.

d) Define stiffness factor.

e) Write any two basic concepts of kani’s method.

f) Why do we perform approximate analysis?

g) What are the different forms of arches?

h) State the cable theorem.

i) Where the sagging and hogging moment occurs on the usually loaded

beam?

j) What are the fixed end moments at each end for a continous beam with

sinking support?

k) Write any two basic concepts of slope deflection method?

l) State Eddy’s theorem.

m) Write two effect of temperature changes in suspension cables.

n) What is the difference between suspension cables & anchor cables?

o) Write any two basic concepts of kanis method?

Unit - I

2) Analyse the continous beam shown in fig. by slope deflection method and also

draw SFD and BMD.

OR

3) Analyse the portal frame shown in fig. by slope deflection method and draw

Bending moment diagram.

Unit -II

4) Analyse the Fixed beam shown in fig. by moment distribution method and also

draw SFD & BMD

OR

5) Analyse the frame by moment distribution method and draw SFD & BMD.

Unit - III

6) Analyse the frame shown in fig. by Kanis method.

OR

7) Explain the portal method for lateral load? Explain the design procedure with

neat sketches?

Unit - IV

8) A two hinged semi-circular arch of uniform cross-section has a radius of 10m. It

is subjected to a point load of 65 KN acting at a section lying in the left half

span and subtending an angle of 30o with the horizontal.

Working from first principle, determine the

a) Horizontal thrust.

b) Vertical reactions.

c) Moment under the load at crown.

OR

9) a) Analyse the cable under uniformly distributed load with an example.

b) Write the effect of temperature changes in suspension cables?

� � �

(DCE 322)

B.Tech. DEGREE EXAMINATION, DEC. 2013

(Examination at the end of Third Year)(Fourth Semester)

Civil Engineering

Paper – II : TRANSPORTATION ENGG.-I


Answer Question No.1 compulsorily [15]

Answer ONE question from each Unit [4 x 15 = 60]

1) a) What is the significance of national highway development programme?

b) What is horizontal alignment?

c) Write any 2 factors affecting friction.

d) What is camber?

e) What is tar?

f) What is the need of overtaking sight distance?

g) Write about surface drainage.

h) What are the types of pavements?

i) What are the general causes of pavement failures?

j) What is the importance of highway drainage?

k) Name the usual tests employed for evaluating road stones.

l) Give the relationship between fatigue life and stress ratio.

m) Write any two causes of pot holes.

n) What is geometric design?

o) Enumerate any two components of total reaction time of drivers.

UNIT – I

2) Write about the different stages of Engineering surveys for highway location.

OR

3) a) What is the necessity of highway planning?

b) What are the factors controlling alignment?

UNIT – II

4) Write about different highway cross section elements.

OR

5) a) Write about CBR test with neat sketch.

b) Differentiate between horizontal alignment and vertical alignment.

UNIT – III

6) Write down the design of rigid pavements using Westergard’s stress equation

for wheel loads.

OR

7) Write the construction procedure for:

a) Bituminous pavements.

b) Cement concrete pavements.

UNIT – IV

8) a) What is the importance of highway drainage?

b) Write about different failures cement concrete pavements.

OR

9) Enumerate the broad classification of planning of maintenance activities of

highways.

��

(DCE323)



Civil Engineering

Paper - III : WATER RESOURCES ENGINEERING - II


Answer Q.1 compulsory ( 15)

Answer ONE question from each unit. (4 X 15 = 60)

1) a) What is the necessity of stream gauging?

b) Define meandering.

c) What is the importance of stability analysis?

d) What is forebay?

e) Write the equation for finding capacity factor.

f) What is meant by reservoir flood routing.

g) How do you find the life of a reservoir?

h) What are galleries?

i) What is meant by sub-surface float?

j) What is meant by degrading type of river?

k) What are the different types of dams?

1) What is meant by reservoir sedimentation?

m) Define seals.

n) What are the different modes of failures in gravity dam?

o) What is meant by load curve?

UNIT - I

2) a) Draw a neat sketch showing various components of a canal headwork.

Briefly explain the functions of each component.

b) Explain the necessity of a cross-drainage structure. How do you classify

cross drainage works.

OR

3) a) Explain in detail the classification of the Aqueducts.

b) What is meant by meandering? What are the basic factors controlling

process of meandering?

UNIT - II

4) a) Discuss the factors influencing the selection of a site for a proposed dam.

b) Write demerits of buttress dams.

OR

5) Differentiate clearly between the following:

a) Flood control reservoir and a multipurpose reservoir.

b) Retarding basin and a storage reservoir.

c) Firm yield, design yield and secondary yield of a reservoir.

d) Spillway, Dam, Barrage.

UNIT - III

6) a) Define elementary profile of dam and derive the base width of elementary

profile based on stress and sliding criteria. Consider the full reservoir

condition.

b) Write detailed notes on:

i) Uplift force.

ii) Earthquake forces on gravity dams.

OR

7) a) Explain practical profile of the gravity dam with neat sketches.

b) Explain what are the modes of failure in gravity dams.

UNIT - IV

8) Describe with neat sketches the various seepage control measures through:

a) Body of earthen dam.

b) Foundation of earthen dam.

OR

9) Write the equation for calculating the discharge capacity of an Ogee spillway.

How does ‘coefficient of discharge’ in the equation varies with

a) Depth of approach.

b) Slope of upstream face of the spillway.

c) Submergence of the spillway by the tail water.

d) The ratio of design head to actual head over the spillway.

��

(DCE 324 )



CIVIL ENGINEERING

Paper - IV : DESIGN OF CONCRETE STRUCTURES-II


Answer one question from each unit. [5×15=75]

UNIT -I

1) Design a short R.C. column to take an axial load of 5000KN. The size of the

column is not to be more than 700mm. use spiral reinforcement. Mix of

concrete to be used is M25. Take permissible stress in longitudinal steel as

130N/mm2. The characteristic strength of steel may be taken as 250 N/mm

2.

OR

2) Design a continuous one-way slab having three equal spans of 3m each as

shown in fig. With the following data: imposed load 2.5kN/m2,concrete grade=

M 15 and steel grade=Fe415.

UNIT -II

3) Design a two-way slab for a room 5.5mx4.0m clear in size if the superimposed

load is 5kN/m2.use M15 mix and Fe415 grade steel.

a) The edges are simply supported and corners not held down.

OR

4) A flat slab is supported on 600mm dia circular columns spaced 8mx6m apart

in both directions. The column head has a diameter of 120cm. The live load on

the flat slab is 5kN/m2. Determine the moments in the flat slab along its 8m

span.

UNIT -III

5) Design a circular column to carry an axial load of 1500kN using

i) Lateral ties

ii) Helical reinforcement. Use M25 Mix and Fe415 grade steel.

OR

6) a) Explain the basis for the simplified code procedure for analysing the design

strength components of a biaxially loaded column with rectangular cross

section.

b) Define effective height and write the effective lengths for different end

restraint of the member.

UNIT -IV

7) a) Where are the critical sections for shear located in the case of

i) The toe slab.

ii) The heel slab in the design of the base slab of a contilever retaining

wall? Explain them with the help of sketches.

b) What are the forces acting on retaining wall?

OR

8) Design a cantiliver retaining wall to support a bank of earth 5m high above the

earth level at the toe of the wall. A building is to be built on the back fill.

Assume that a 3m surcharge will approximate the lateral earth pressure effect.

Given earth density=17 KN/m3; angle of internal friction n=35

o; coefficient of

friction between concrete and soil=0.45; bearing capacity=150 KN/m2

. Use

µ15Mix and Fe415 grade steel.

UNIT -V

9) Design a combined footing for two columns carrying axial loads of 500KN

and 800KN. Both columns are 30cm in dia and are spaced 3m centre to centre.

Columns are reinforced with 18mm bars and consist of M25 concrete. The

bearing capacity of the soil is 80KN/ m2

use µ20 mix and Fe415 grade steel.

OR

10) a) What is meant by footing? Classify the different types of footings?

b) Determine the area and depth of foundation of a square column carrying

1000KN vertical load. The gross bearing capacites of soil is 100KN/m2 ,

density is 17KN/ m3 and angle of repose is 29

o.

� � �

(DCE325)



Civil Engineering

Paper - V : DESIGN OF STEEL STRUCTURES – II

Time: 03 Hours Maximum Marks: 75

Answer One question from each unit

All questions carry equal marks.

UNIT – I

1) Design a rectangular tank of capacity 1,10,000 liters of water supported over a

12m high staging. Columns are supported over concrete pedestal. The bearing

capacity of soil is 100 kN/m2. Design wind speed may be taken as 1.05 kN/m

2.

Plates of 1.25 m width and 8.75 m length are available.

OR

2) Design a rectangular steel water tank for a capacity of 1 lakh liters. The height

of the tank is 10m above ground, however staging need not be designed.

UNIT – II

3) Design a lintel over opening of 5m. The lintel is in a wall 430mm thick. It has to

support a uniform load of 150kN in addition to the masonry. The weight of the

masonry may be assumed to be 22kN/m3 and the height of brick work above the

lintel is 3.5m.

OR

4) Design a gantry girder for an industrial building to carry an electric overhead

traveling crane with the following data.

Crane capacity = 180 kN Weight of crane excluding crab = 100 kN

Weight of crab = 40 kN Span of crane between rails = 12 m

Wheel base = 3.0 m Minimum hook approach = 1 m

Span of gantry girder = 8 m Weight of rail section = 30 kg/m

Check the suggested section for bending stresses.

UNIT - III

5) The trusses in a factory building are spaced at 4.5m center to center and the

purlins are spaced at 1.8m center to center. Pitch of the roof truss is ¼ and the

span of the roof is 9m. The vertical load from roof sheets are equal to 180 N/m2

and wind load on the roof surface normal to the roof is equal to 1000N/m2.

Design an I section purlin.

OR

6) Describe the different types of roof trusses and state the spans for which they

are suitable. Suggest a suitable type of truss for an industrial building for a span

of 30 m.

UNIT - IV

7) Design the cross section of a plate girder for the following data.

Effective span of the girder = 18 m

Superimposed loading = 45 kN/m. Design the connections also.

OR

8) Design the cross section of a plate girder for the following data.

Effective span of the girder = 15m

Superimposed loading = 45 kN/m.

Central point load = 10 kN.

Design the connection and longitudinal section of the girder and bearing

stiffener to a suitable scale showing intermediate stiffeners.

UNIT - V

9) Design a foot bridge with the following data:

C/C spacing of main girders = 15m

Cross girder spacing = 2.0m c/c

Clear walking width between main girder = 2.5m

Pedestrian load = 5 kN/m2

Height of main girders = 1.5m

Flooring to be made to timber planks, supported on cross girders.

Design the following members also:

a) 4th top chord member of Foot Bridge from left.

b) 4th bottom chord member of Foot Bridge from left.

c) 1st vertical member from left

d) 1st diagonal member from left

e) Design on joint and Rakers.

OR

10) The effective span of a plate girder deck type bridge for a single meter gauge

track is 30m. The dead load, live load and impact load reaction is 900kN. The

vertical reaction due to overturning effect of wind at each end of the girder is

180kN. Design a suitable bearing.

��

(DCE 326)

B. Tech. DEGREE EXAMINATION, DEC. - 2013


CIVIL ENGINEERING

Paper – VI : Geo-Technical Engineering-II


Answer Question No.1 compulsorily. (15X1=15)

Answer ONE Question from each Unit. (4X15=60)

1) a) Shear strength of sensitive clays is measured by which test?

b) What is Gross Safe bearing capacity?

c) What is the group efficiency of driven piles in sand at a close spacing?

d) What is the area ratio of the sampler?

e) What are the methods of exploration?

f) Write any 2 factors affecting the stability of slopes.

g) State any two types of pile foundations.

h) What are the stages in sub surface exploration?

i) What are the types of retaining walls?

j) Define bearing capacity.

k) State the use of split spoon sampler.

l) What is the use of Rehbann’s construction?

m) What do you understand by imperfect ditch construction?

n) Define settlement ratio.

o) Where is the negative projecting conduit installed?

UNIT - I

2) a) State the objectives of site exploration and explain the importance of the

depth of exploration for different structures.

b) What is standard penetration number? Explain the procedure for

determining it in the field. Mention the corrections to be applied to the

observed values of standard penetration number.

OR

3) a) Explain Westergaard’s theory for the determination of the vertical stress at

a point. How is it different from Boussinesq’s solution?

b) The contact pressure for a square footing 2mx2m is 400kN/m2. Using 1:2

distribution, determine the depth at which the contact pressure is 100 kN/

m2.

UNIT – II

4) a) Explain in detail the various factors affecting the stability of slopes.

b) Write short note on any one method of improving the stability of slopes.

OR

5) a) What are the types of retaining walls? Explain in detail.

b) What are the different types of lateral earth pressure? Explain. UNIT – III

6) a) How would you fix the depth of the foundation? Discuss the Rankine’s

formula for the minimum depth.

b) Using Skemption theory, compute the bearing capacity of a square footing

of 2 x 2m, resting on the saturated clay at undrained condition at a depth of

1.5 m from the ground level. Depth correction factor, dc = 1 + 0.2 D/B,

shape correction factor, sc = 1+0.2 B/L, where D, B and L are the depth of

foundation, width and length of the footing respectively.

OR

7) a) What are the different types of shear failures?

b) Explain the method of plate load test.

UNIT – IV

8) a) Describe the procedure for the estimation of settlement of a pile group by

considering only the frictional resistance of the pile group.

b) Sketch and List out the component parts of Well foundation and discuss

about its functions.

OR

9) a) What do you understand about the grip length? What is its importance in

well foundations?

b) Determine the outside diameter of an open well to be sunk through 40 m

sand and water to bed rock, if the allowable bearing capacity is 2000kN/m2.

The well foundation receives a load of 50 MN from the superstructure. The

mantle friction is 30kN/m2.Test the feasibility of sinking. Also calculate the

thickness of the seal.

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b.tech. degree examination, dec 2013 (examination · pdf filefind the maximum positive and...

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