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.