Training report - RCC Bridge

A RCC bridge is a monolithic structure that is poured in place. Forms are placed, the reinforcing steel is placed into the forms and a concrete mix is poured into the forms. The rebar extends beyond the form to allow connection to the next section to be poured. In a PSC structure the elements are precast either in a yard or onsite. They are cast with longitudinal holes to allow the prestressing strands to be extended between them. These strands use their tension to pull the units together and to act as reinforcement by prestreeing the entirety of the structure to make it stronger.

1. 18 days vocational training
report on
“ATRAYEE BRIDGE CONSTRUCTION ”OVER
RIVER ATRAYEE
(29.06.2018 –16.07.18)
Agency –“Mackintosh Burn Ltd.”
Submittedby–PRASUNMANI
College:NarulaInstituteofTechnology
UniversityRollNo.:0515010067

2. ATRAYEE BRIDGE CONSTRUCTION

3. ACKNOWLEDGEMENT
ForourfutureengineeringexperienceimprovementwetaketrainingunderPW(Roads)Directorate.Wetake
trainingatongoingAtrayeeBridgeConstructionprojectoverriverAtrayee,Pagliganj,WestBengal.Itismy
pleasuretobeindebtedtovariouspeople,whodirectlyorindirectlycontributedinthedevelopmentofthiswork
andwhoinfluencedmythinking,behavior,andactsduringthetraining.Iexpressmysinceregratitudefor
providingmeanopportunitytoundergotrainingatongoingAtrayeeBridgeConstructionprojectoverriver
Atrayee,underPW(Roads)Directorate.GreatappreciationgoestoJuniorEngg.whohelpsusfromtimetotime
duringtheproject.WearethankfultoAssistantEngg.,PW(Roads)Directorate,BalurghatN.H.sub-division
andExecutiveEngg.,PW(Roads)Directorate,N.H.DivisionNo.–VII(Malda)forhissupport,co-operation,
andmotivationprovidedtomeduringthetrainingforconstantinspiration,presenceandblessings.Thesupervision
andsupportthathegavetrulyhelptheprogressionandsmoothnessoftheVocationalTrainingprogram.Theco-
operationismuchindeedappreciated.Ialsoextendmysincereappreciationtomyfacultymembers(Civil
EngineeringDepartment),whoprovidedtherevaluablesuggestionsandprecioustimeinaccomplishingmyproject
report.Besides,thistrainingprogrammakesmerealizedthevalueofworkingtogetherasateamandasanew
experienceinworkingenvironment,whichchallengesuseveryminute.Lastly,Iwouldliketothankthealmighty
andmyfamilyfortheirmoralsupportandmyfriendswithwhomIsharedmyday-to-dayexperienceandreceived
lotsofsuggestionsthatimprovedmyqualityofwork.

4. Details of the Training Project Report
Name of the project –ATRAYEE BRIDGE CONSTRUCTION
Project Description –Construction of a bridge over River
Atrayee on Pagliganj –Khaspur route in the dist. Of Dakshin
Dinajpur.
Client–PW(Roads) directorate , NH Division No. -VII
Name of the Company –Mackintosh Burn Ltd.
Project Location –Pagliganj, Dakshin Dinajpur
Project Type –Bridge Construction
Training Period –29.06.18 –16.07.18
Submitted by –PRASUN MANI
University Roll No.–0515010067
Email ID –[email protected]
College Name –Narula Institute of Technology

5. CONTENTS
Introduction
Safety
Auto Level Survey
Planning of Bridge
Materials
Composition of Bridge
Batching Plant
Site Execution

6. INTRODUCTION
The construction of the bridge over Atrayee river on
Pagliganj –Khaspur route in the district of Dakshin
Dinajpur, West Bengal.
Agency for the project “Mackintosh Burn Ltd.” and the
project is executed by PW(Roads) Directorate, National
HighwayDivision No. –VII(Malda).
The overall bridge length is 259.914 M.
Date of commencement of the project –25.02.2016 .

7. S A F E T Y
Theprimaryobjectiveofourorganizationistoensure
effectivecontroland
eliminationofaccidentinalljobsites,andtomaintaina
conductiveenvironment
andinfrastructuralfacilitiesatworkplaceswithdue
considerationforthestateofbeingSAFE
S=spotthehazard
A=assesstherisk
F=findasaferway
E=everyday
So,safetyisthestateofbeingcertainthatadverseeffectwill
notbecausedbysome
agentunderdefinedcondition.“Anymethodortechniqueor
processwhichcan
minimizeunwantedevents(accidents)inanindustrial
concernmaybereferredtoas
amethod,techniqueorprocessofIndustrialSafety.”
Industrialsafetyisthescienceorartofidentifying,
evaluatingandcontrollingwork
placehazards.Itincludesmeasuretopreventhuman
exposurestochemicaland
physicalagentsaswellasfaultyorunsafeworkpractices.
SAFETY EQUIPMENTS

8. Auto Level Survey
A dumpy level,builder'sauto
level,levelinginstrument,orautomatic
levelisanopticalinstrumentusedto
establishorverifypointsinthesame
horizontalplane.Itisusedinsurveyingand
buildingwithaverticalstafftomeasure
heightdifferencesandtotransfer,measure
andsetheights.
ReducedLevelinsurveyingrefersto
equatingelevationsofsurveypointswith
referencetoacommonassumeddatum.It
isaverticaldistancebetweensurveypoint
andadopteddatumplane.Thusitis
consideredasthebaseelevationwhichis
usedasreferencetoreckonheightsor
depthsofotherimportantplaces.
For“AtrayeeBridgeConstruction”the
temporaryBMhasfixedandfurther
extendedfromthepermanentBM,whichis
situatednearAndolonSetu,Balurghat.

9. SURVEY DETAILS
RL of Bridge Abutments and Piers –
Sl.
No.
OBJECT
OBJECT
NO.
REDUCE LEVEL (M)
WELLCAP
TOP
CUTTING
EDGE
1
ABUTMEN
T
A1
19.43 -4.57
A2
2 PIER
P1
19.43 -4.57
P2
P3
P4
P5
P6
Total Length of Well 24 M

10. SURVEY DETAILS
Existing Ground Level–
Sl.
No.
OBJECT
OBJECT
NO.EXISTINGGROUNDLEVEL (M)
1
ABUTMEN
T
A1 23.75
A2 19.790
2 PIER
P1 17.981
P2 18.132
P3 18.266
P4 19.009
P5 19.493
P6 20.451

11. PLANNING OF
BRIDGE
General Arrangement Drawing

12. REFEENCE DRAWINGS

13. MATERIALS USED IN
CONSTRUCTION
Reinforcement Cement Concrete (R.C.C.) ;
Plain Cement Concrete (P.C.C.) ;
Cement (OPC-53) ;
Reinforcement of different diameter [Ф8mm,
Ф10mm, Ф12mm, Ф16mm, Ф20mm, Ф25mm, Ф32mm];
Tendons (for Pre-stressing) ;
Aggregates –a) Coarse Aggregate ,
b) Fine Aggregate (Sand) ;
Water ;
Admixture / Retarders.

14. DIFFERENT TYPES OF
CONCRETE GRADE &
APPLICATIONS
TYPE OF
CONCRETE
GRADEOF
CONCRETE
APPLICATIONS
P.C.C. M20 Top & bottom plugging
R.C.C.
M25
Toconstruct Dirt Wall
& Fin Wall
M40
To construct Seismic
Arrester, Girders &
Deck Slab.

15. COMPOSITION OF BRIDGE
Dirt Wall
Fin Wall
Abutments
Pier
Pier Cap
Bearing
Girder
Deck Slab
Hand Rails
Footpath
Crash Barrier
Seismic Arrester –a) Longitudinal Seismic Arrester
b) Transverse Seismic Arrester

16. Themainapplication
oftheDirtWallisto
retainorresistthe
earthwhichis
situatedattheends
(banks)ofthebridge.
DIRT WALL

17. TheFinwallsare
adjacenttothe
abutmentsandactas
retaining walls.
TheFinwallscan
eitherbeattachedto
theabutmentorbe
independentofit.
Themainapplication
ofFinwalltoretain
theearth.
FIN WALL

18. Abutmentrefersto
thesubstructureat
the ends of
abridgespanor
damwhereonthe
structure's
superstructurerests
orcontacts.Multi-
spanbridgesrequire
pierstosupportends
ofspansunsupported
byabutments.
ABUTMENT

19. A pier, in
architecture,isan
uprightsupportfora
structure or
superstructuresuch
asanbridge.
PIERS

20. Definitionofpier
cap.Theupperor
bearingpartof
abridgepier;
usuallymade of
concreteorhard
stone;designedto
distribute
concentratedloads
evenlyoverthearea
ofthepier.
PIER CAP

21. Abridgebearingis
acomponent of
abridgewhich
typicallyprovidesa
resting surface
betweenbridgepiers
andthegirders.The
purpose of
abearingistoallow
controlledmovement
andtherebyreduce
thestressesinvolved
duetovibrations.A
common formof
modern bridge
bearing isthe
elastomericbridge
bearing
BEARING

22. Agirderbridge,in
general,isabridge
thatusesgirdersas
the means of
supporting the
deck,aswellasit
helpstodistribute
thedeck load
evenlytothepiers
throughpiercaps.
GIRDER

23. Adeckslabisone
wherethedeckand
any supporting
structureacttogether
asasinglebeam.
Aslabdeckisone
wherethedeckis
analyzedasaplate.
DECK SLAB

24. Ahandrailisarail
thatisdesignedtobe
graspedbythehand
soastoprovide
stabilityorsupport
tothepedestrian
users. Alsoit
providessafetyto
thewalkersaswell
asthevehicles.It
alsoprovidethe
balancetothewhole
structure.
HAND RAILS AND RAIL POSTS

25. A sidewalk
orpavement,also
known as a
footpath or
footway,isapath
alongthesideofa
road,generally
usedbywalking
peopletocrossthe
bridgebyfoot.
FootpathWidth
=1.5M
FOOTPATH

26. Crash barriers
keep vehicles
within their
roadway and
preventthemfrom
colliding with
dangerous
obstaclessuchas
bridgeabutments
orfootpaths.
CRASH BARRIER

27. A Longitudinal
SeismicArresters
areusedtoreduce
the seismic
shocks
longitudinally
(alongthelength
ofthebridge).
Longitudinal Seismic Arrester

28. A Transverse
SeismicArresters
areusedtoreduce
the seismic
shocks
transversely(along
thewidthofthe
bridge).
Transverse Seismic Arrester

29. BATCHING PLANT
Aconcrete plant, also known as abatch plantor batching plantor
aconcrete batching plant, is equipment that combines various
ingredients to form different grade concrete. Some of these inputs
include water, air, admixtures, sand, aggregate and cement.

30. SITE EXECUTION
Chain-age start at 0
Pagliganj Roadside
(NH-512); end of chain-age
at Khaspur 1430 M.
Chain-age at bridge
from 260 M to 550 M
Rail Post Dimension
= (265 x 265) MM
Hand Rail Post thickness
= 0.65 M
Hand Rail Post width
= 0.85 M
C/C distance of Hand Rail
Post = 1.8 M (Approx.)
Carriageway Width = 7.5 M

31. CONCLUSION
The main aim of studies within this project was to
investigate how a bridge is constructed within its
desired properties. We get knowledge about the basic &
advanced techniques of bridge construction as
well as saw the challenges which a civil engineer have to
face during construction i.e. labour problems, cost
management, environmental challenges etc. We cleared our
many doubts regarding bridge construction.