Launching of Br. 21
-
Upload
mayurcivil -
Category
Documents
-
view
225 -
download
0
Transcript of Launching of Br. 21
-
8/8/2019 Launching of Br. 21
1/32
LAUNCHING OF A 250LAUNCHING OF A 250ft.ft.
OPEN WEB THROUGH STEELOPEN WEB THROUGH STEELGIRDER AT BR. NO. 21GIRDER AT BR. NO. 21
-
8/8/2019 Launching of Br. 21
2/32
-
8/8/2019 Launching of Br. 21
3/32
LAUNCHING SCHEMELAUNCHING SCHEME
-
8/8/2019 Launching of Br. 21
4/32
-
8/8/2019 Launching of Br. 21
5/32
-
8/8/2019 Launching of Br. 21
6/32
CRITICAL STAGES EXAMINEDCRITICAL STAGES EXAMINED CH SPAN AT MAX. CANTILEVERCH SPAN AT MAX. CANTILEVER
REVERSAL OF STRESSES IN CH SPANREVERSAL OF STRESSES IN CH SPAN
DIAGONALSDIAGONALS
LIFTING OF CH SPAN AT OTHER ENDLIFTING OF CH SPAN AT OTHER END
STRESSES IN FLOOR MEMBERS OF CH SPANSTRESSES IN FLOOR MEMBERS OF CH SPAN
WITH CANTILEDGEWITH CANTILEDGE
LINK MEMBER AT CENTRELINK MEMBER AT CENTRE
LINK MEMBER CONNECTIONSLINK MEMBER CONNECTIONS
REVERSAL OF STRESSES IN MAIN MEMBERREVERSAL OF STRESSES IN MAIN MEMBER
STRESSES IN GRILLAGE SUPPORTSTRESSES IN GRILLAGE SUPPORT
THEORATICAL DEFLECTIONS CALCULATEDTHEORATICAL DEFLECTIONS CALCULATED
AND COMPARED WITH ACTUAL DEFLECTIONAND COMPARED WITH ACTUAL DEFLECTION
AT VARIOUS STAGES OF LAUNCHINGAT VARIOUS STAGES OF LAUNCHING
-
8/8/2019 Launching of Br. 21
7/32
BRIDGE NO. 21BRIDGE NO. 21
-
8/8/2019 Launching of Br. 21
8/32
-
8/8/2019 Launching of Br. 21
9/32
DESIGN OF LINK MEMBERDESIGN OF LINK MEMBER
-
8/8/2019 Launching of Br. 21
10/32
PRACTICE TILL NOWPRACTICE TILL NOW
SINCE CENTRE TO CENTRE DISTANCE OF CHSINCE CENTRE TO CENTRE DISTANCE OF CHSPAN IS LESS THAN STD. 250 SPAN GIRDER,SPAN IS LESS THAN STD. 250 SPAN GIRDER,TO FACILITATE LINKING, ALL CROSS GIRDERS,TO FACILITATE LINKING, ALL CROSS GIRDERS,TOP & BOTTOM BRACINGS WERE BEINGTOP & BOTTOM BRACINGS WERE BEING
FABRICATED FOR ONE TIME USEFABRICATED FOR ONE TIME USE
CONCEPT PROPOSEDCONCEPT PROPOSED
USE SAME CH SPAN CROSS GIRDERS, TOP &USE SAME CH SPAN CROSS GIRDERS, TOP &
BOTTOM BRACINGS AND TO DESIGN NEW LINKBOTTOM BRACINGS AND TO DESIGN NEW LINKMEMBERS TO CONNECT TWO GRDERS WITHMEMBERS TO CONNECT TWO GRDERS WITHDIFFERENT C/C DISTANCEDIFFERENT C/C DISTANCE
-
8/8/2019 Launching of Br. 21
11/32
-
8/8/2019 Launching of Br. 21
12/32
ELEVATION OF LINK MEMBERELEVATION OF LINK MEMBER
-
8/8/2019 Launching of Br. 21
13/32
TOP PLAN OF LINK MEMBERTOP PLAN OF LINK MEMBER
-
8/8/2019 Launching of Br. 21
14/32
VIEW OF LINK MEMBERVIEW OF LINK MEMBER
LINK MEMBAR
CH SPAN
MAIN GIRDER
-
8/8/2019 Launching of Br. 21
15/32
-
8/8/2019 Launching of Br. 21
16/32
REPLACEMENT OF BED BLOCKSREPLACEMENT OF BED BLOCKS
-
8/8/2019 Launching of Br. 21
17/32
SIDE SLEWINGSIDE SLEWING
-
8/8/2019 Launching of Br. 21
18/32
ARRANGEMET FOR SIDE SLEWINGARRANGEMET FOR SIDE SLEWING
-
8/8/2019 Launching of Br. 21
19/32
-
8/8/2019 Launching of Br. 21
20/32
ADVANTAGES WITH THIS SCHEMEADVANTAGES WITH THIS SCHEME
ECONOMICAL BY ABOUT 40 LAKHSECONOMICAL BY ABOUT 40 LAKHS
REDUCTION IN FABRICATION WORK OFREDUCTION IN FABRICATION WORK OFTEMP. CROSS GIRDERS, TOP& BOTTOMTEMP. CROSS GIRDERS, TOP& BOTTOMBRACINGSBRACINGS
SAVING IN TIMESAVING IN TIME
-
8/8/2019 Launching of Br. 21
21/32
A FEW SITE PHOTOGRAPHSA FEW SITE PHOTOGRAPHS
-
8/8/2019 Launching of Br. 21
22/32
-
8/8/2019 Launching of Br. 21
23/32
-
8/8/2019 Launching of Br. 21
24/32
-
8/8/2019 Launching of Br. 21
25/32
-
8/8/2019 Launching of Br. 21
26/32
-
8/8/2019 Launching of Br. 21
27/32
-
8/8/2019 Launching of Br. 21
28/32
EXECUTING THE WORK AT SITEEXECUTING THE WORK AT SITE
AFTER LAUNCHING NOSE COMPLETELY THEAFTER LAUNCHING NOSE COMPLETELY THE
CANTELEDGE WEIGHT WERE REMOVED.CANTELEDGE WEIGHT WERE REMOVED.
MAJOR WORK OF THIS MEGNITITUDE WASMAJOR WORK OF THIS MEGNITITUDE WASLAST DONE DEPATMENTALY SOME 32 YEARSLAST DONE DEPATMENTALY SOME 32 YEARS
BACK.BACK. DUE TO RESTRICTED AREA AVAILABLE AT SITEDUE TO RESTRICTED AREA AVAILABLE AT SITE
IT WAS DECIDED TO FIRST ASSEMBLE CH SPANIT WAS DECIDED TO FIRST ASSEMBLE CH SPANPANNEL BY PANNEL AND LAUNCH THE SAMEPANNEL BY PANNEL AND LAUNCH THE SAME
TO INCREASE THE ASSEMBLING AREA CC CRIBTO INCREASE THE ASSEMBLING AREA CC CRIBSATGING WAS PROVIDED ON EITHER SIDE OFSATGING WAS PROVIDED ON EITHER SIDE OFTHE CANAL BANK.THE CANAL BANK.
-
8/8/2019 Launching of Br. 21
29/32
ContdContd
GRILLAGE OF ISMB WAS PROVIDED ON TOP OFGRILLAGE OF ISMB WAS PROVIDED ON TOP OF
CRIB STAGING TO COUNTER THE FRICTIONALCRIB STAGING TO COUNTER THE FRICTIONALFORCE OF LAUNCHING AND CANTILEVER LOADFORCE OF LAUNCHING AND CANTILEVER LOADOF LAUNCHING NOSEOF LAUNCHING NOSE
DURING ASSEMBLING/LAUNCHING OF L/NOSE,DURING ASSEMBLING/LAUNCHING OF L/NOSE,
THE MAIN SPAN WAS ASSEMBLED CONFIRMINGTHE MAIN SPAN WAS ASSEMBLED CONFIRMINGTO B1TO B1--2001 ON ONE SIDE.2001 ON ONE SIDE.
CANTELEDGE WEIGHT OF 140 MT WAS PLACEDCANTELEDGE WEIGHT OF 140 MT WAS PLACEDON THE REAR OF LAUNCHING NOSE DURINGON THE REAR OF LAUNCHING NOSE DURINGFINAL STAGE OF LAUNCHING.FINAL STAGE OF LAUNCHING.
DEFLECTION OF LAUNCHING NOSE WASDEFLECTION OF LAUNCHING NOSE WASRECORDED REGULARLY AFTER LAUNCHING FORRECORDED REGULARLY AFTER LAUNCHING FOR
OBSERVING THE BEHAVIOUR.OBSERVING THE BEHAVIOUR.
-
8/8/2019 Launching of Br. 21
30/32
ContdContd
MAIN SPAN ALREADY ASSEBLED ON THE SIDEMAIN SPAN ALREADY ASSEBLED ON THE SIDE
WAS BROUGHT INLINE OF LAUNCHING NOSE.WAS BROUGHT INLINE OF LAUNCHING NOSE. MAIN SPAN CONNECTED WITH THE NOSE WITHMAIN SPAN CONNECTED WITH THE NOSE WITH
THE HELP OF SPECIALLY DESIGNED LINKTHE HELP OF SPECIALLY DESIGNED LINKMEMBER.MEMBER.
ROLLER ARRANGEMENT WAS PROVIDED UNDERROLLER ARRANGEMENT WAS PROVIDED UNDERTHE STRINGER OF MAIN SPAN FOR ROLLING OFTHE STRINGER OF MAIN SPAN FOR ROLLING OFMAIN SPAN.MAIN SPAN.
AFTER THE MAIN SPAN WAS LAUNCHEDAFTER THE MAIN SPAN WAS LAUNCHEDCOMPLETELY THE SAME WAS DELINKED WITHCOMPLETELY THE SAME WAS DELINKED WITHTHE LAUNCHING NOSE.THE LAUNCHING NOSE.
-
8/8/2019 Launching of Br. 21
31/32
ContdContd
BOTTOM LATERAL BRACEINGS WERE PROVIDEDBOTTOM LATERAL BRACEINGS WERE PROVIDED
RAILS WITH STEEL CHANNEL SLEEPER WERERAILS WITH STEEL CHANNEL SLEEPER WEREFITTEDFITTED
MAIN SPAN LOWERED TO REQUIRED LEVEL TOMAIN SPAN LOWERED TO REQUIRED LEVEL TO
KEEP THE RL OF NEW AND OLD SPAN SAME.KEEP THE RL OF NEW AND OLD SPAN SAME. FOR PULLING OUT THE OLD GIRDER ANDFOR PULLING OUT THE OLD GIRDER AND
ROLLING IN THE NEW GIRDER ROLLINGROLLING IN THE NEW GIRDER ROLLINGARRANGEMENT UNDER THE MAIN CROSSARRANGEMENT UNDER THE MAIN CROSS
GIRDER AT BEARING POINT, PULLING &GIRDER AT BEARING POINT, PULLING &RESTRAINING WINCHES ETC. WERE PROVIDED.RESTRAINING WINCHES ETC. WERE PROVIDED.
-
8/8/2019 Launching of Br. 21
32/32
ContdContd
THE TAKING OUT OF OLD GIRDER ANDTHE TAKING OUT OF OLD GIRDER ANDINSERTING OF NEW GIRDER WAS DONEINSERTING OF NEW GIRDER WAS DONESUCCESSFULLY IN A TRAFFIC BLOCK OF TENSUCCESSFULLY IN A TRAFFIC BLOCK OF TENHOURS AFTER PLANNING THE SAMEHOURS AFTER PLANNING THE SAME
MATECULOUSLY.MATECULOUSLY.