WELCOME
ALL FACULT FACULTY Y MEMBERS MEMBERS &
ALL ALL PARTICIPA RTICIPANT NTS S OF INTEGRATED COURSE-10109
ACKNOWLEDGEMENT ACKNOWLEDGEM ENT
WE LIKE TO PAY PAY OUR GRATITUDE TO SH. A. K. GOEL DIRECTOR IRICEN WHO IS LEADING &GIVING PERFECT INVIRONMENT FOR OVERALL DEVELOPEMENT AND LEARNING LEARNING AT IRICEN. WE EXPRESS OUR SINCERE THANKS TO SH. V. B. SOOD PROF/BR FOR HIS VALUABLE VALUABLE GUIDANCE IN PREPARING THIS PROECT. WE ALSO EXTEND OUR SPECIAL THANKS TO SH. NEERA KHARE COURSE DIRECTOR FOR HIS VALUABLE VALUABLE GUIDANCE AND PERSONEL ATTENTION IN EACH AND EVERY ASPECT THROUGHOUT THE COURSE. WE EXPRESS OUR SINCERE THANKS TO ALL THE FACULT FACULTY Y OF IRICEN IR ICEN FOR THEIR VALUABLE VALUABLE LECTURES WHICH HAVE HAVE HELPED US IN UPGRADING OUR KNOWLEDGE IN ALL THE AREAS.
ACKNOWLEDGEMENT ACKNOWLEDGEM ENT
WE LIKE TO PAY PAY OUR GRATITUDE TO SH. A. K. GOEL DIRECTOR IRICEN WHO IS LEADING &GIVING PERFECT INVIRONMENT FOR OVERALL DEVELOPEMENT AND LEARNING LEARNING AT IRICEN. WE EXPRESS OUR SINCERE THANKS TO SH. V. B. SOOD PROF/BR FOR HIS VALUABLE VALUABLE GUIDANCE IN PREPARING THIS PROECT. WE ALSO EXTEND OUR SPECIAL THANKS TO SH. NEERA KHARE COURSE DIRECTOR FOR HIS VALUABLE VALUABLE GUIDANCE AND PERSONEL ATTENTION IN EACH AND EVERY ASPECT THROUGHOUT THE COURSE. WE EXPRESS OUR SINCERE THANKS TO ALL THE FACULT FACULTY Y OF IRICEN IR ICEN FOR THEIR VALUABLE VALUABLE LECTURES WHICH HAVE HAVE HELPED US IN UPGRADING OUR KNOWLEDGE IN ALL THE AREAS.
BALANCED CANTILEVER CONSTRUCTION OF PSC BRIDGE
CAST-IN- SITU CAST-INS ITU CONTINUOUS UNIT
INTEGRATED COURSE 10109
PRESENTED BY :
SHIV KUMAR AXEN/CONST./REWARI/NR A.D.AGNIHOTRI AXEN/CONST./GONDA/NER A.K.BARSAIYAN ADEN/BR/BHOPAL/WCR GUIDED BY! SH. V.B.SOOD PROFESSOR BRIDGE
INTRODUCTION
BALANCED CANTILEVER CONSTRUCTION IMPLIES CONSTRUCTION OF CANTILEVER SEGMENTS FROM A PIER IN A BALANCED FASHION ON EACH SIDE UNTIL THE MID SPAN IS REACHED AND A CLOSURE KNOWN AS STITCH SEGMENT IS MADE WITH OTHER HALF SPAN CANTILEVER CONSTRUCTED FROM THE PRECEDING PIER. THE PROCESS " "
"
THE FORM WORK IS SUSPENDED FROM THE END OF THE LAST SEGMENT. THE NEW SEGMENT IS CAST AND ONCE THE CONCRETE HAS DEVELOPED A PREDETERMINED STRENGTH# THE SECTION IS POST TENSIONED TO THE REST OF THE BRIDGE. THE SAME ERECTION PROCESS IS REPEATED TILL THE STRUCTURE IS COMPLETED.
CONSTRUCTION SEQUENCE
S,$, S%%, * M, L3 S%%,
P$% 1
E( S2'
P$% H%'(
P$% H%'(
P)
P*
P+
FUNDAMENTALS OF DESIGN
B4$5($ ' 6$(% (%7 68 4%$3 3: %%, ;%% %' %%, '$% ,% ;%$, 3: ,% %<, %%, E' %%, $ $,%',%( ;$, ,% 2%=$34 3% ' 33 ' $, $ ,3 %34. E' %%, 6%3% %5: 4223,$ '( '53 6%3% ' 6'% :3 ' %; %%,.
The stab!t" #$ %a&t!e'e( s se%)(e* at ea%h ste+ b" +(e,st(ess&- %ab!es +(#'*e* & the )++e( $be( , I& #(*e( t# a'#* as"..et(% #'e(t)(&&.#.e&ts/ the %#&st()%t#& s *#&e s"..et(%a!!" #& the +e( #& b#th the s*es
NECESSIT OF CAST,IN,SITU CONSTRUCTION
WHEN ACCESS BELOW THE BRIDGE IS EXPENSIVE OR PRACTICALLY IMPOSSIBLE DUE TO BUSY ROAD# RIVER# CANAL# DEEP VALLEY OR RAILWAY TRACK ETC.
LONGER SPAN >WHERE LAUNCHING IS VERY COSTLY?.
C#&st()%t#& #'e( b)s" (#a*
SEGMENTAL CONSTRUCTION OVER RAILWA TRACK
DMRC Cast & +!a%e ba!a&%e* %a&t!e'e(
SEGMENTAL CONSTRUCTION IN PROGRESS OVER A RIVER2 SEA
CONSTRUCTION MAC3INER 1. BATCHING PLANT. ). TRANSIT MIXERS. *. CONCRETE PUMP. +. WELDING GENERATOR. @. CONCRETE VIBRATORS. . CONCRETE NEEDLES.>O&)@MM DIA?. . COMPRESSOR. . TYRE MOUNTED CRANE. 9. HAND WINCH. 10. CHAIN PULLEY BLOCK. 11. PIPE WRENCH. 1). CLC GANTRIES >0T?-+NOS. 1*. GROUT PUMP.
C#&%(ete P).+
B(*-e b)!*e(
CRITICAL CONSTRUCTION MATERIALS 1. POT-PTFE BEARINGS ). ANCHORAGES-19K1@#AND GRIPS. *. BEARING PLATES. +. HT STRANDS >IS-1+) CLASS-)? @. GI SHEATHING PIPES-ID 110MM. . CEMENT OPC @* GRADE . REINFORCEMENT STEEL IS-1 . ADMIXTURE IS-910*
OPERATION SEQUENCES 1 SURVE WORK! CENTER LINE MARKING FOR FOUNDATION OF TRESTLES WILL BE DONE WITH THE HELP OF THEODOLITE/ TOTAL STATION. 4CONSTRUCTION OF PIER 3EAD5 >'?. TRESTLE FABRICATION AND ERECTION FOR CONSTRUCTION OF PIER HEAD. >6?. DESIGN AND FIXING OF BEARINGS.
OPERATION SEQUENCE
OPERATION SEQUENCES
C#&t
>?. SUPER STRUCTURE STABILIING ARRANGEMENTS! THE ADDITIONAL TRESTLE AND SAND ACKS OF *@0 TONNE CAPACITY ARE PLACED AT REUIRED LOCATIONS. >(?. CALCULATION OF CO-ORDINATES FOR HORIONTAL CURVE AND DECK LEVEL FOR VERTICAL CURVE. >%?. SOFFIT# WEB EXTERNAL AND DECK SHUTTERING. >:?. SOFFIT# WEB AND DECK REINFORCEMENT.
OPERATION SEQUENCES CONTD
>?. CABLE PROFILING. >? EMBEDDED FIXTURES. >$?. END STOPPER SHUTTERING. >?. CONCRETING WITH CONCRETE PUMP. >7?. CURING IS DONE FOR 1+ DAYS. >5?. HYDRO TESTING OF SHEATHING PIPE AT 0.* MP' PRESSURE. >?. PRESTRESSING AND GROUTING! STRESSING STARTS ONLY IF CONCRETE ATTAINS THE DESIRED COMPRESSIVE STRENGTH.
OPERATION SEUENCES CONTD. 3.CONSTRUCTION OF CANTILEVER:
>'?. FABRICATION AND ERECTION OF CLC GANTRIES >BRIDGE BUILDERS?>))+SETS?. >6?. PRE-CAMBER CALCULATION. >?. GANTRY ALIGNMENT AND LEVEL. >(?. SOFFIT SHUTTERING. >%?. EXTERNAL SHUTTERING. >:?. REINFORCEMENT# SHEATHING PIPE AND CABLE PROFILING.
OPERATION SEUENCES CONTD. >?. INTERNAL SHUTTERING OF CLC GANTRY IS MOVED ON MONO RAILS AND FIXED TO THE LOCATION AS PER DRG. >?. END STOPPER SHUTTERING. >$?. APPLYING ADHESIVE >NITO BOND ETC.? ON FACE OF OLD CONCRETE. >?. CONCRETING OF *M LONG SEGMENTS ON EITHER SIDE OF PIER HEAD SIMULTANEOUSLY OR ONE BY ONE USING CONCRETE PUMP. >7?. CURING.
OPERATION SEUENCES CONTD. >5?. PRE STRESSING AND GROUTING. >?. RELEASING OF CLC GANTRY FORM WORK. >?. MOVEMENT OF CLC GANTRY >BRIDGE BUILDER.? FOR SHIFTING TO NEXT UNIT. >3?. LEVELLING AND ALIGNMENT OF CLC GANTRIES. >2?. SIMILAR PROCEDURE TO BE ADOPTED FOR OTHER SEGMENTS.
Cast & +!a%e ba!a&%e* %a&t!e'e(
OPERATION SEUENCES CONTD. 4.CONSTRUCTION OF END SPAN.
CASTING OF END SPAN IS DONE AFTER THE CANTILEVER CONSTRUCTION. ACTIVITIES INVOLVED REMAINS THE SAME AS EXPLAINED FOR PIER HEAD CONSTRUCTION.
5.CASTING OF STITCH SEGMENT
AFTER CASTING OF CLC SPAN# THE REMAINING PORTION OF LENGTH ).@0M SEGMENT IS TO BE STITCHED.
SAFET PRECAUTIONS 1. LOAD TEST OF CRANE SHOULD BE DONE BY THIRD PARTY. ). WORKING PLATFORM AND SAFETY NETS WILL BE PROVIDED. *. SAFE ACCESS BY MEANS OF LADDER WILL BE PROVIDED FROM GROUND TO DECK TOP. +. THE MACALLOY BAR IS DESIGNED FOR FOS *. @. ALL ELECTRICAL CONNECTIONS SHOULD BE PROPER. . TEMPORARY HAND RAIL WILL BE FITTED FOR DECK SLAB CASTING. . FALL ARRESTER SHOULD BE PROVIDED. . HEIGHT GAUGES AND CAUTION BOARDS SHOULD BE FIXED FOR ROAD USERS. 9. PROPER PERSONAL EUIPMENTS >PPE? LIKE SAFETY HELMETS# SAFETY SHOES# SAFETY BELTS AND SAFETY NETS SHALL BE USED.
3EIG3T GAUGE FOR ROAD USERS
SAFET NET
DOCUMENTATION AND RECORDS 1. POUR CARD. ). BAR BENDING SCHEDULE. *. REINFORCEMENT INSPECTION CHECK LIST. +. INSPECTION CHECK LIST BEFORE APPROVAL OF CONCRETE. @. CHECK LIST FOR SHEATHING# ANCHORAGES# AND EMBEDDED FIXTURES. . STRESSING CHART AND PRE STRESSING REPORT. . GROUTING REPORT. . SAFETY CHECK LIST FOR CLC WORK.
ADVANTAGES 1.THIS METHOD HAS GREAT ADVANTAGES OVER THE OTHER FORMS OF CONSTRUCTION IN URBAN AREA WHERE TEMPORARY SHORING WOULD DISRUPT TRAFFIC SERVICES BELOW. ).SUITABLE OVER WATERWAYS WHERE FALSE WORK WOULD NOT ONLY BE EXPENSIVE BUT ALSO A HAARD. *.USEFULL WHERE SPAN LENGTH IS MORE BUT LAUNCHING OF GIRDER IS NOT POSSIBLE.
BRIDGE OVER WIDE RIVER
ADVANTAGES CONTD +. ONLY A SMALL PORTION OF THE SUPER STRUCTURE ADACENT TO THE PIER /ABUTMENT WILL REUIRE USE OF FALSE WORK. @. PROCESS IS SAFE AND ECONOMICAL. . ADOPTABILITY TO CURVATURE AND SUPER ELEVATION. . USEFUL FOR ODD SIES# SINGLE SPAN ETC AS FALSE WORK IS LESS.
LONGER SPAN OVER RL TRACKS
DISADVANTAGES
1. CAST-IN-SITU SEGMENTAL CONSTRUCTION IS A RELATIVELY SLOW CONSTRUCTION METHOD IN COMPARISON TO PRE CAST SEGMENTAL CONSTRUCTION. ). THE WORK IS PERFORMED IN SITU $.% EXPOSED TO WEATHER CONDITIONS. *. THE TIME DEPENDENT DEFORMATION OF CONCRETE BECOME VERY IMPORTANT AS A RESULT OF EARLY LOADING OF THE YOUNG CONCRETE. +. HIGH PRECISION IS REUIRED.
