marine and offshore construction equipments
TRANSCRIPT
MARINE AND OFFSHORE CONSTRUCTION
EQUIPMENT
FABIL .TMT15CTM003
VISVESVARAYA NATIONAL INSTITUTE OF TECHNOLOGY,NAGPUR
INTRODUCTION
• OCEANS PRESENT UNIQUE ENVIRONMENTAL CONDITIONS THAT DOMINATES METHODS, EQUIPMENT AND PROCEDURES
• MOST MARINE CONSTRUCTIONS AT SUBSTANTIAL DISTANCE FROM SHORE, THUS UNIQUE METHODS AND EQUIPMENT'S HAS TO BE USED
• CONSTRUCTION OPERATION : 2000 M • EXPLORATORY OIL DRILLING : 6000 M• EQUIPMENT ARE DESIGNED TO WORK IN AND UNDER SEA AND DRAWN
HEAVILY ON NAVEL ARCHITECTURE • INCLUDE BARGES, SHIPS AND CONSTRUCTION, DRILLING ,DREDGING
EQUIPMENT.
• MAIN CONSTRUCTION ACTIVITIES OFFSHORE WIND FARM, OIL PLATFORM
BRIDGE PIERS HARBOR
BASIC MOTIONS IN A SEAWAY• A TYPICAL FLOATING STRUCTURE HAS 6 DEGREE OF FREEDOM AND 6 BASIC
RESPONSE TO WAVE• ROLL, PITCH, HEAVE, SURGE ,SWAY AND YAW
• VESSELS OR EQUIPMENTS RESPONDS TO COMPLEX SET OF ALL THE ABOVE MOTIONS
• MOTION ARE AFFECTED BY WAVES AND TIDES
BARGES
• LARGE FLAT BOTTOMED TOWED OR SELF PROPELLED BOAT USED FOR HEAVY GOODS AND BULK CARGO TRANSPORT
• LONG FOR MINIMAL SURGE AND PITCH RESPONSE TO WAVE, WIDE FOR MINIMAL ROLL
DEEP FOR ADEQUATE BENDING STRENGTH AGAINST HOG AND SAG• IN CONSTRUCTION THEY ARE USED TO CARRY ROCK REMOVED BY
CLAMSHELL OR DRAGLINES AND UPON WHICH EQUIPMENT LIKE TRACKED CRANE OR LOADER ARE OPERATED• TYPICAL BARGE RUN 80 TO 160 M LENGTH ,WIDTH 1/3 OF LENGTH ,DEPTH
1/15 OF LENGTH
CRANE BARGES• BARGE EQUIPPED WITH SHEER LEG CRANE OR FULLY ROTATING CRANE• SHEER LEGS ARE RIGID A-FRAME SUPPORT AND MANEUVERED BY DECK
ENGINE ,TUGS • WHICH CAN LIFT AN LUFF BUT NOT SWING• MAXIMUM CAPACITY 7000 T• LESS COSTLY COMPARED TO ROTATING
DERRICK BARGES• FULLY REVOLVING• WORKHORSE OF OFFSHORE CONSTRUCTION• CAPACITY 500- 1500 T• THE ADVANTAGE IS OPERATION IN ALL DIRECTIONS –SWING• DESIGNED UPON NAVEL AND STRUCTURAL ARCHITECTURE
SEMISUBMERSIBLE BARGES
• STANDARD BARGE SERVING CARGO TRANSPORT OR AS SUPPORT TO CRANE ,OTHER OPERATIONAL EQUIPMENT
• LARGE BASE PONTOON (FLAT BOTTOM HOLLOW METAL CHAMBER)• FULLY SUBMERGED DURING OPERATION• PROVIDE MORE STABILITY AGAINST WAVES• 4 TO 8 COLUMN THAT EXTEND THROUGH WATER SUPPORT DECK
JACK UP CONSTRUCTION BARGE• USE FULL FOR WORKING IN TURBULENT SEA, COASTAL WATER• FITTED WITH 4 TO 8 LARGE JACKS AND LEGS ; TUBULAR OR FABRICATED
STEEL• BARGE IS TOWED TO WORK POSITION AND JACK UP FREE FROM WAVE • OPERATE ONLY IN RELATIVELY SHALLOW WATER 30-60 M , 150 EXTREME , SINCE LEGS ARE LOWERED TO SEA FLOOR
LAUNCH BARGES• USED FOR TRANSPORT AND LAUNCHING OF JACKETS• TO DELIVER SUBSEA TEMPLATES WHICH BECOME WORKING PLATFORM OR
THE STRUCTURE ITSELF• VERY LARGE AND STRONGLY BUILT• HEAVY RUNNER BEAMS/LAUNCH BEAMS OVER WHICH JACKET WILL SLIDE
CATAMARAN BARGES
• FOR HEAVY LIFTING IN HARBORS AND ESPECIALLY USED FOR SUBMERGED PREFABRICATED TUNNEL
• TWO LONG BARGES SPREAD APART AND JOINED OVER THE TOP BY GANTRIES• GANTRIES MAY BE TWIN GANTRY TRUSSES TO ENABLE LIFTING
DREDGE• FOR DREDGING – CLEAR BED OF HARBOR , RIVER , OTHER AREA OF WATER BY SCOOPING OUT MUD• DIFFERENT TYPES BASED UPON EXTENT , QUALITY, TYPE OF SOIL REMOVED ,
DISPOSAL REQUIREMENT AND DEPTH
CLAMSHELL DREDGE - BUCKET ON VERTICAL LINE ENABLES TO USE CLOSE TO EXISTING STRUCTURE.DRAGLINE DREDGE - SUITABLE FOR DIGGING TRENCHES IN SHALLOW WATER , SOFT AND MODERATE HARD SOILLADDER OR CONTINUOUS FLIGHT BUCKET – DIG DEEPLY >40 M IN HARD MATERIAL.
HYDRAULIC SUCTION DREDGE – SUCK UP MATERIAL THROUGH A PIPE THEN DISCHARGE IN TO PONTOON OR REQUIRED DISTANCE CUTTER HEAD DREDGE – IN DENSE AND HARD MATERIAL , CUTTER HEAD MOUNTED AT THE END OF SUCTION LINE
TRAILER SUCTION HOPPER – SELF PROPELLED VESSEL WITH JET TO BREAK UP SAND AND SUCK RIPPER TEETH TO CUT HARD MATERIAL.
ANCHOR HANDLING BOATS• TO PICK AND MOVE ANCHOR EVEN IN ROUGH SEA• SHORT HIGH MANEUVERABLE VESSELS• HYDRAULIC ASSIST EQUIPMENT IS AVAILABLE
DRILLING VESSELS• SEMISUBMERSIBLE AND BARGE TYPE• USED MAINLY FOR EXPLORATORY DRILLING• HEAVY LIFT EQUIPMENT FOR DRILL STRING• HAS CENTRAL MOON POOL( OPEN WELL ) WHICH PROVIDE DIRECT AND PARTIALLY PROTECTED ACCESS TO SEA BELOW• ABILITY TO WORK AT GREAT DEPTHS• SETTING SUBSEA TEMPLATES, PIPE LINE REPAIR AND SEA FLOOR MODIFICATION• USUALLY EQUIPPED WITH LARGE HOIST OF 500 T CAPACITY
FLOATING CONCRETE PLANT• MOUNTED ON LARGE , HEAVY DUTY BARGE, EQUIPPED WITH MOORING
LINES TO HOLD THE BARGE IN POSITION• HAVE ; LARGE BIN FOR CA AND FA SILO FOR CEMENT SILO FOR FLY ASH AND BLAST FURNACE SLAG WATER TANK BATCHING PLANT CONCRETE MIXER – NORMALLY TURBINE MIXER CONCRETE PUMP
ROV
• REMOTELY OPERATED UNDERWATER VEHICLES• HIGHLY MANEUVERABLE , OPERATED BY CREW ABOARD A VESSEL• COMMON IN DEEP WATER HYDROCARBON INDUSTRY• LEAST EQUIPPED WITH VIDEO CAMERA AND LIGHT• USED FOR INSPECTION,WELDING
THANK YOU
The waves tell of ocean spaces,Of hearts that are wild and brave.