rajapeth rob is an bridge in amravti if want soft copy of file with report also write me at akashkolamkar@gmail.com ,,,, iam engineer of project ,, so i will try to explain all points wit h reports ,,, now am a student of engineering so i completelly know need of seminars

1. Department Of Civil Engineering
Rajapeth ROB (Non railway portion
… Dastur nagar side ...
Submitted by: Guided by:
Mr. Akash S. Kolamkar (4CA44) Prof. A. R. Bijwe
Department Of Civil Engineering
Rajapeth ROB (Non railway portion
… Dastur nagar side ...
Submitted by: Guided by:
Mr. Akash S. Kolamkar (4CA44) Prof. A. R. Bijwe
Department Of Civil
Engineering
“Rajapeth ROB”
(Non railway portion)
… Dastur nagar side... Under the guidance of
Prof. A. R. Bijwe

2. Content’s Introduction
 When I joined….
 Some important Specification’s
 Structural drawing’s
 Concrete work’s
 Curing
 Stressing
 Bearing’s
 Traffic operation’s
 Problems Faced at Site
 Safety measure’s
 When I Resigned….
 References
 Animated Presentation of Rajapeth ROB.

3.  Introduction
a) When gate is closed b) when gate is opened
 Amravati railway station is placed just side of Rajapeth crossing hence daily
many trains are crossed over this section.
 Therefore, every times need to closed it, hence traffic operation are completely
stopped , and possibility of accidents are increased.
After train will crossed over this section , then large traffic complication should be formed.

4.  Some people are try to cross this section under
the gate, then possibility of accidents was not
ignored.
Sometimes , emergency services like
Ambulance , Fire services are also need to stop
there.
Possibility of accidents was increased between
traffic from ‘Ram mandir to Rajapeth’ and traffic
from ‘Rajapeth square to Shankar nagar’
Rate of accident should be high with in this
area, because of this project reduction of
accidents are possible.
a) People’s try to cross under section
b) Traffic after crossing this section
Current status of crossing

5. b) Important information about project
 Name of project :- Design & Construction of Approaches (Non Railway portion) to
ROB in of level Crossing No.S-4 on BD-AMI Section, Near Rajapeth,Amravati.
 Amount of Contract :- 4053.28 lakh’s
 Date of work order :-01/10/2015
 Period of Completion :- 24 Month’s (Upto 30-09-2017)
 Defect Liability Period :- 60 Month’s

6.  Name of Client :-
Amravati Muncipal Corporation (AMC).
 Name of Contractor :-
M/S. Chaphekar and company, Nagpur.
 Project Management Consultant (PMC):-
S.N. Bhobe and Associates Pvt. Ltd. Mumbai.
 Designer and provider of Stressing Materials:-
Dynamic Prestress (I) Pvt.Ltd. Nashik.
c) Authorities
 Designer of steel :-
Crescent Engineer’s Mumbai.
 Material testing & designer:-
Geotech services Pvt. Ltd, Nagpur
 Designer of bearing’s:-
Tefcon Bearing Pvt. Ltd Pune.

7. D ) General Arrangement Drawing of Project
 The G.A.D. plan whose
show arrangement of bridge
i.e name of arm, name of
pier , name of abutment
,type of bearing and there
location, slope , and general
instruction also.
This is the first drawing of
Rajapeth ROB.
‘C’ Arm
‘A’ Arm
‘B’ Arm
‘D’ Arm

8. e ) Constructional Area’s
Area whose
highlighted with yellow
color this area was
construction by
another company. For
that work a separate
tender should be
invited by IRCTC.
And remaining construction was done by
m/s Chaphekar and company Nagpur.
The whole work is
divide in two parts :-
1) railway portion
2) Non Railway portion.

9. f ) Some important Specification’s
 All units is in:-
1)dimension – MM 2)Levels -M
 Clear cover to R/f :-
for all type of concrete work use only 40 mm cover.
 Grade of steel Fe 500
 Laps :-
1)min . Lap length 50 X dia of bar.
2)Lapping shall be staggered suitably.
3)Not more than 25 % of bars shall be lapped at one section.
 Slope for ‘C’ arm is designed as 1 : 25.64 ( 1 M = 39 MM )

10.  When I joined…...
 I will joined on this project as an designation of assistant site engineer on ‘C’ arm at Dastur
nagar side , when I join there then following work should be completed :-
 The foundation of CA-02 , CP-10 , CP-11 , CP-09 should be done. At ‘C’ Arm of
Dastur nagar side.
 The pier cap and pedestal of CA-02 , CP-11 , CP-10 are already casted.
 The bearing at CA-02 , CP-11 , CP-10 are fixed.
 Cable pipe’s are laid at there position .
 The diaphragm of CA-02 and CP-10 are completely casted.
 Bearing plate’s are fixed but clamp should not be opened.
 Continuing the Process of inserting cable’s in pipe.
 Continuing the work of fixing formwork and reinforcement of soffit & rib .

11. a) PSC Girder at Support
Pier 1800 dia.
Anticrash Side
Barrier
PSC Girder
Bearing
Deck Slab
Rib
Soffit
RCC Pedestal
Pier Cap
RCC)
Depth Foundation
(7000X5500X2000
PCC 150 thick
 Structural drawing’s (CA-02 to CP-10)
60 m only
Drawing of PSC Girder at Support

12. Actual Site Photograph of
PSC Girder at Support
Captured on 19 06 2016
a) Pier (CP-10) b) Abutment (CA-02)
Pier
1800 dia.
PSC
Girder
Pier Cap
Diaphragm at
support
abutment
bearing
End block

13. Abutment
(CA -02)
Pier (CP-11)
Pier (CP-10)
b ) Showing Plan & C/S of PSC Girder C/C Bearing of
30 MT & 29 MT @ Arm “C” from CA-02 to CP-10

14. c ) Reinforcement detail in PSC Box Girder at center

15. d ) Reinforcement detail in PSC box Girder at Intermediate
Support

16. e ) variation in width of Rib reinforcement
60 m span
End block
CA-02
End block
CP-10

17. f ) detail’s of Anticrash barrier
Barrier’s
Rebar
16 mm
dia. bars
Drain water collector.
 Anticrash barrier is designed to restrain vehicles
from crashing off the side of a bridge and falling onto
the roadway.
While barriers are normally designed to minimize
injury to vehicle occupants, injuries do occur in
collisions with traffic barriers.
It keep vehicles within their roadway and prevent
vehicles from colliding with dangerous obstacles such
as buildings, walls or large storm drains.
This bar provided for holding the formwork of
Anticrash barrier.

18. a ) Grade of Concrete to be used in Concreting
 RCC Abutment - M-35
 RCC Pier - M-35
 RCC Anticrash Barrier - M-40
 RCC Deck Slab - M-40
 Pedestal - M-45
 Foundation of
Abutment and pier - M-30
 Pier cap - M-30
 Leveling coarse - M-25
 Concrete work’s
concrete

19. b ) Ready Mix Concrete Plant
 RMC plant is located at Shankar nagar . Just 10
min. travelling Distance from Site.
 This area say as “Camp”
 All the worker’s are lived at
camp. b) Operating panel
Sand Aggregate
Supply of cement
Discharge of
concrete
 Ready-mix concrete is
concrete that is manufactured in
a factory or batching plant,
according to a set recipe, and
then delivered to a work site by
truck mounted in transit mixers.
a) RMC Plant

20. C ) Transportation of concrete
 Transportation of concrete
should done by Transit Mixer’s (TM)
 The capacity of TM is 6 m3
 Maximum rotation speed of TM is
up to 21 RPM.
 TM Should be present on site within
10 min.
 Company operate 4 transit mixer’s
 Within four two mixer’s from “Tuli
Concrete movers”
 And another two mixer’s are own by
Company .
Transit Mixer

21. d ) Concrete testing
Slump cone test
appratus
i ) Slump Cone test
The value of slump cone test
should not be less than 25 MM and
more than 75 MM.
 Slump cone test should be perform
both at plant and site .
Tamping rod
16 mm dia.
609.6 mm in
length
 Slump should be
recorded with time also .
 This test should be perform
under the execution of
company’s engineer and PMC
engineer .
 When transit mixer is present on
site . Then firstly slump cone test was
performed to check workability of
concrete .

22. ii ) Compressive Strength of concrete
b) Concrete cubes
 After slump cone test . If
found satisfied result
then cubes should be filled.
 For every TM six cubes to be filled.
from this six cube , Three cube’s are send
to PMC and remaining cubes send to
AMC Laboratory at Prashant nagar .
 Both of slump cone test and filling of
cube should be done under execution of
company’s engineer and PMC’s engineer.
 A separate record should be maintain on
site which include’s
1) portion of construction
2) grade of concrete
3) time when slump perform
4) value of slump (both plant and site)
7) no. of cube’s filled and many more.
a) Universal testing Machine

23. Concreting on 09 06 2016 for
PSC Girder’s
e ) Movement of concrete on site
 After testing of concrete , if
slump is maintained, then concrete
will be allow to concreting work .
Otherwise TM will be returned.
Concrete pump.
(56 m³/hr)
Pipe for transporting
Concrete.

24. f ) Placing of concrete
 Pipe should be directly placed
on formwork where concrete is
required .
 If the pipe is placed at there
position then concrete pump give
Stroke to Discharge the concrete
from pipe at there location .
Concrete coming out
of the pipe line

25. g ) Compaction of concrete
 Compaction of concrete is the process
adopted for expelling the entrapped
air from the concrete.
 Compaction of concrete is done by
using electric Vibrators .
 This is a type of needle vibrator .
 This vibrator is operated by
electrically .
 Company have seven number of
vibrator’s .
 In them five are electrically
operated and two are operated by
Diesel engine .
h ) finishing
 This is last process of concreting , it’s
need for slab , soffit. And not need for
web concreting. After vibrating the
surface should be make well leveled and
give necessary slope under execution of
engineer.

26. Actual Photograph .
Captured on 09 06 2016
 Concreting of rib
 Concrete is
fill in rib up to
this level only .
and remaining
concreting
should be done
at the time of
concreting of
deck .
Diaphragm
 End block must be cast before
casting the rest of the
bridge girder.

27.  Curing
 Method of Curing is select
as per situation , but try to
make a better curing for
newly casted member.
 Curing by Gunny bags should
be preference For pier ,
abutments & soffit also .
 Ponding method are select
for curing the deck slab.
 And when both
of these curing
method are not
applicable then
manually curing
should be
preferred.
a) Manual curing
c) Ponding method

28.  Stressing
 Stressing of all cables should be done after 10 days of concreting.
 But not before the concrete has attained a works cube strength of 28 Mpa.
 Follow the sequence of cable stressing cable no:- 1,5 then 3,7 and 2,6
 Cable shall be stressed from both ends simultaneously.
 The values of extensions given in the cable extension chart are applicable at
each end.
 Initial slack should be eliminated while measuring the extension.
 Stressing should be continued till the desired extension is reached.
 The cables shall be grouted immediately after all the cable’s are
stressed.
 The grouting shall be done according to I.R.C.18
 Cable’s nos. 4 & 8 are dummy cable’s
 The slip at each end shall not Exceed 6mm.
Stressing

29.  Abutment (CA-02)
at Dastur nagar
 This Cable’s should
be open for Stressing.
 The hole
provided for fillin
pipe by cement
Slurry ,After
Stressing.
Situation on 09th June 2016
a ) One side for stressing
Grout tube
Prestressing has two types:-
1. Pre-tensioning.
2. Post tensioning
 On Rajapeth ROB the
post-tensioning method use
as method of stressing.

30. 1 cable or
Dummy
Abutment (CA -02) Dastur nagar side
Situated on 09th June 2016
b ) No. of stressing cable’s
 If incase some problem was standing
at time of stressing then dummy cable should
be used.
19 cable’s
NO. 02
1 cable
or
Dummy.
NO. 04
14
cable’s
NO . 03
19 cable’s
NO. 06
14
cable’s
No. 07
1 cable
or
Dummy
NO. 08
19 cable’s
NO. 01
19 cable’s
NO. 05

31.  The Cable’s should be Covered by this pipes , for protection of cable
from concrete and easy movement of cable’s at time of stressing.
 After stressing this pipes are completely fill by cement slurry .
 Total 8 pipes are provided at both sides.
 In case of interference of rebar & the cable duct ,the rebar shall be
adjusted or kinked away to clear the interference.
c ) Protection of cable’s
Pipe’s in rib

32. d ) Components of Stressing
i ) Wedges & Anchor Head’s
wedges Anchor head
 Cables are locked
using the wedges and
barrels. These
wedges and barrels
provide such
arrangement that
cable can come out
of it, but can’t go
back.
a) Sheet for components of stressing & its
location By Dynamic prestress Pvt.Ltd
b) Arrangement’s

33. ii ) jack
 Jack are use for stressing the cable’s
from one end and same jack should be
placed at another end.
 Jack’s are lift by using cranes.
 This steel pipe’s are provided for
easily Inserting the cable’s in anchor
head.
a) Specification of jack used.
Specification’s by manufacturer.
b)steel pipe’s c) Jack

34. iii ) location of cable’s
PipesGrout tube
Bearing plateCables
a) Anchor head
Wedge’s
Stressing block
trumpet
Wedge’s
b) Prestressing system cone
with recess Dimension c) Arrangement's

35. iv ) Prestressing pump
Monostrand
hydraulic jack
Cables
Wedges and
barrels
Prestressing pump
 Prestressing pump are displaying that how many
pressure is applying to cables for stressing.
 Pressure is given at same time form both sides of bridge.
 Pressure is applying after interval of every 50 kg/cm2
points and also measure the elongation of both
side cable’s.
 Elongation at both end should
be restrictly same.
 Least count of the
prestressing pump : 5 kg/cm².

36. e ) Cable Profiling in PSC girder’s
 Normally in post-tensioning one
side should be fix and another side
will be stressed, but on Rajapeth
ROB “cable profiling” should be
provided hence both side stressing
should be needed.
Cable Profiling in girder

37. f ) Location of cable’s in center of span
Cable Profiling in girder

38. g ) after stressing work
 After stressing wedges are lock the cable’s at anchor head.
 Removed the jack from cable’s.
 And remaining cables are cut except 50 mm distance
from anchor head.
 Whole block are packed by concrete, only grout tube having
25 mm pipe are carried out from this concreting for filling
slurry in pipe.

39. h ) Grouting work
 Grout is a particularly fluid form of concrete.
 Grout is generally a mixture of water, cement, sand,
 Grouting can be defined as the filling of duct, with a material that that provides an
anti-corrosive alkaline environment to the prestressing steel and also a strong bond
between the tendon and the surrounding concrete.
 For grouting work a separate grout tube
should be provided.
Grouting
instrument

40. h ) diff. between before and after stressing .
Grout tube
b) After stressing worka) Before stressing work
Open
for
Grout
tube
Surface filled by concrete

41.  Bearing’s
 The bearing whose use in Rajapeth ROB these are
designed and provided by Tefcon Bearing Pvt. Ltd Pune.
 Bearing’s are designed for
1)Design load :- 1860 KN , 2)Dead load :- 857 KN , 3) Hori. load :- 186 KN
 PTFE Bearing are very sensitive for sliding due to very low coe. Of friction between
PTFE and SS surfaces. Hence it is very essential to insert Wooden blocks between the
girders and pedestals after installation of bearing . These wooden blocks should be removed
when the bridge is open to traffic.
 When bearing was send from manufacturer then the both top and bottom surface of join
by weld ,this says as clamp. This clamp was removed after installation of bearing at there
position.
 Once when this bearing are received at plant, and company engineer are try open this
,then it’s opened but its not possible to again closed it , then finally send it to the
manufacturer for repairing.
 Material in contact with bearing :-
1)top (soffit) – M40 2) bottom (pedestal) – M45
Clamp

42. a ) Sheet of free bearing
Sheet of bearing
By Crescent engineer’s Mumbai

43. b ) type’s of bearing
Clamp
POT plate
 Bearing’s are divide into two type’s
1) fix end bearing 2) free end bearing
 This is a type of fix bearing.
POT plate
 This is a type of free bearing.
 Free in longitudinal direction.
 PTFE means Poly tetra fluro ethylene.
PTFE Base
A ) Fix end bearing B) Free end bearing

44. c ) Location of bearing’s in bridges
Pedestal
Free Bearing
PSC Girder
Free bearing’s in CA-02

45.  Traffic operation’s
 Diversion plan when gate will closed during period of construction
Diversion plan of traffic
during construction period .
This fig. shows
traffic diversion plan
during period of
construction , when
gate will closed.
This plan give’s
diversion option for
traffic without
crossing gate , with
safe traffic movement.

46.  Problems Faced at Site…
 Due to construction site is in main area of Amravati . Hence large traffic problem
should be faced.
 Very small space are remaining for movement of traffic , then traffic should be
congested at just side of site, Hence main problem stand as safely movement of
traffic .
 One accidental moment I would like to share with you :-
at the time of concreting of rib , work is going to complete but because of TM will
empty and some minute’s are remaining for new TM , within this period concrete will jammed in pipe ,
and concrete pump give stroke of concrete , but concrete will jammed, then accidentally last pipe
whose completely filled with concrete this is forcely throw on main traffic road , luckily at that time
intensity of rainfall is very high , hence there have no traffic on road , and no anyone get injured.

47.  Safety measure’s
 Providing the first aid.
 Banners.
 Providing the vehicle.
 Using the safety equipments.
 Minimum access for public in inside of project.
 Training the workers.
 All safety measure under execution of PMC officer.
 Watchman’s are appointed to operate movement of traffic in construction
area, on the day of concreting.
 Service road whose nearby site was repaired by company.

48.  When I Resigned….
 The whole work are stopped for one month between 11 July to 16 august.
 Casting of all diaphragm’s should be done , within the span between CA-02 to CP-10.
 Concreting of soffit are complete for 60 m span.
 Concreting of rib should be done.
 Pier of CP-09 & CP-08 are casted upto the level of pier cap.
 Deck slab from CA-02 to CP-10 are casted with cantilever portion.
 Stressing of all eight pipe cable’s are completed with grouting.
 Clamp of all bearing’s are opened & wooden block are removed .
 Cutting of cable’s except 50 mm and concreting of block should be done.
 Reinforcement are placed for casting of anticrash barrier’s , it’s base are already fix to
concrete of deck with it’s reinforcement.

49.  Conclusion
 Construction of the project link will provide an additional fast
and Safe moving outlet from the Dastur nagar & Shankar nagar to
the badnera road and thereby providing much needed relief to the
congested traffic. The entire project was executed by Amravati
municipal corporation .
 Because of these project traffic movement of traffic will flow
without any Disturbances.
 The rate of accident’s are reduced up to lowest amount.

50.  References
 I will work on Rajapeth ROB during period of 10th of June to 10th of July as
assistant site engineer.
 Structural drawings submitted by Crescent Engineer’s Mumbai.
 Official photograph’s of project.
 www. Wikipedia. Com
 A Textbook of Concrete Technology by M. S. Shetty.
 A Textbook of Pre-stressed Concrete by N. Krishna Raju.

51.  Animated Presentation of Rajapeth ROB
Rajapeth project.mp4

52. Thank you…
Quarries ???
A
Seminar Presented
by
Mr. Akash Surendra Kolamkar
Please .......