Rapidly deployed pier

• US 5,823,715 A
• Filed: 09/29/1997
• Issued: 10/20/1998
• Est. Priority Date: 09/29/1997
• Status: Expired due to Fees

• Current Assignee: the united states of america as represented by the secretary of the navy
• Original Assignee: the united states of america as represented by the secretary of the navy
• Inventors: Karrh, Billie Rue, Bretz, Glenwood, Davis, Duane Albrecht, Lin, Sheng S., Mack, Kit L., Oppedisano, Samuel J., Murdoch, Michele Ann, Hatch, William G., Huang, Tsongshih
• Primary Examiner(s): Will, Thomas B.
• Assistant Examiner(s): HARTMANN, GARY S
• Application Number:
  US08/937,700
• Time in Patent Office: 386 Days
• Field of Search: 114/258, 114/263, 405/218, 405/219, 405/220
• US Class Current: 405/219
• CPC Class Codes: B63B 21/507 with mooring turrets
• CPC Class Codes: B63H 25/42 Steering or dynamic anchoring by propulsive elements by jets B63H25/46; Steering or dynamic anchoring by propellers used therefor only; Steering or dynamic anchoring by rudders carrying propellers
• CPC Class Codes: E02B 3/064 Floating landing-stages construction of pontoons B63B35/34; landing bridges E01D15/14
• CPC Class Codes: Y02A 10/11 Hard structures, e.g. dams, dykes or breakwaters

Abstract

A pier comprising a floating pierhead structure which has transverse thrurs to assist maneuvering operations and four pedestal cranes to move cargo from and to ocean going ships docked at the structure. At the stern of the structure is a stern ramp receiving platform which is used during cargo off loading operations to allow access to the structure from ships equipped with stern ramps. The mooring system for the floating pierhead structure consist of a single point mooring anchor system located at the bow of the structure and four anchor legs located at the stern of the structure. This mooring system ensures minimal movement of the floating pierhead structure at its bow where the floating pierhead structure interfaces with a fixed position approachway, but allows the structure to be rotated over an arc of ninety degrees. The approachway for the rapidly deployed pier is a fixed position roadway connecting the floating pierhead structure to the shore line. The approachway is fabricated from individual spans supported by steel piles which are driven into the ocean floor. A bridge span which connects the approachway to the bow of the floating pierhead structure is capable of motion in six degrees of freedom relative to the approachway.

Claims

1. A floating pier comprising:

a floating pierhead structure adapted to be floated on a body of water adjacent a shoreline, said floating pierhead structure having a generally semicircular shaped bow, said generally semicircular shaped bow having a semicircular shaped rail mounted on the top portion of said semicircular shaped bow;

an elevated approachway having one end thereof connected to said shoreline and an opposite end thereof connected to said floating pierhead structure;

said elevated approachway including a plurality of identical two lane wide roadway spans, a traffic bypass span and a gap closing span;

said traffic bypass span being positioned approximately at a midpoint of said elevated approachway;

said gap closing span being adapted to connect a portion of said elevated approachway extending from said shoreline to another portion of said elevated approachway extending from said floating pierhead structure when installation of said elevated approachway is complete;

a bridge span having one end fixedly connected to said elevated approachway and an opposite end riding on the semicircular shaped rail of said semicircular shaped bow;

said bridge span having a winch assembly communicating with the semicircular shaped rail of said semicircular shaped bow, said winch assembly operating as a drive source to facilitate rotational movement of said floating pierhead structure through a predetermined angle about said elevated approachway.

2. The floating pier of claim 1 wherein each of said plurality of identical two lane wide roadway spans has a length of about sixty feet and a width of about twenty four.

3. The floating pier of claim 1 wherein said traffic bypass span has a length of approximately one hundred eighty feet and a width of approximately twenty four feet.

4. The floating pier of claim 1 wherein said predetermined angle said floating pierhead structure rotates about said elevated approachway is ±

45 degrees from an initial installation position which directly aligns said elevated approachway with said floating pierhead structure.

5. A floating pier comprising:

a floating pierhead structure adapted to be floated on a body of water adjacent a shoreline, said floating pierhead structure comprising;

a hull floating on said body of water;

a weather deck mounted on a top portion of said hull, said weather deck having a generally semicircular shaped bow, said generally semicircular shaped bow including a semicircular shaped rail mounted on the top portion of said semicircular shaped bow;

a main deck positioned within said hull below said weather deck;

said main deck having a stern ramp receiving platform located at a seaward end of said floating pierhead structure, said stern ramp receiving platform being adapted to receive stern ramps from ocean going vessels equipped with said stern ramps;

a ramp communicating with said main deck and said weather deck to allow for a flow of vehicular traffic between said weather deck and said main deck;

an elevated approachway having one end thereof connected to said shoreline and an opposite end thereof connected to said floating pierhead structure;

said elevated approachway including a plurality of identical two lane wide roadway spans, a traffic bypass span and gap closing span;

said traffic bypass span being positioned approximately at a midpoint of said elevated approachway;

said gap closing span being adapted to connect a portion of said elevated approachway extending from said shoreline to another portion of said elevated approachway extending from said floating pierhead structure when installation of said elevated approachway is complete;

a bridge span having one end fixedly connected to said elevated approachway and an opposite end riding on the semicircular shaped rail of said semicircular shaped bow;

said bridge span having a winch assembly communicating with the semicircular shaped rail of said semicircular shaped bow, said winch assembly operating as a drive source to facilitate rotational movement of said floating pierhead structure through a predetermined angle about said elevated approachway.

6. The floating pier of claim 5 wherein each side of the hull of said floating pierhead structure includes a pair of thrusters with a first of said pair of thrusters being positioned within said hull at a fore end of said floating pierhead structure and a second of said pair of thrusters being positioned within said hull at an aft end of said floating pierhead structure.

7. The floating pier of claim 5 further comprising a plurality of skegs affixed to a bottom portion of said hull of said floating pierhead structure, said plurality of skegs being positioned at the seaward end of said hull.

8. The floating pier of claim 5 further comprising first, second, third and fourth pedestal cranes located on a starboard side of said floating pierhead structure, said first, second, third and fourth pedestal cranes being mounted on the weather deck of said floating pierhead structure.

9. The floating pier of claim 5 further comprising a single point mooring anchor system located at the semicircular shaped bow of said floating pierhead structure and an adjustable seaward mooring system positioned at the seaward end of said floating pierhead structure, said single point mooring anchor system and said adjustable seaward mooring system allowing for orientation of said floating pierhead structure through said predetermined angle about said elevated approachway.

10. The floating pier of claim 9 wherein said single point mooring anchor system comprises:

a counterweight slidably mounted within a counterweight housing located in a forward portion of the hull of said floating pierhead structure, said counterweight having a padeye affixed to the top of said counterweight;

a turret column positioned at the semicircular shaped bow of said floating pierhead structure, said turret column being rotationally mounted within said main deck to allow for rotational movement of said floating pierhead structure through said predetermined angle;

a bottom collar attached to said hull, said bottom collar being rotatably coupled to said turret column to allow said bottom collar to rotate about said turret column;

a first chain jack affixed to the upper surface of said main deck directly above said counterweight;

a first chain sheave positioned directly above said chain jack, said first chain sheave being attached to the bottom surface of said weather deck;

a second chain sheave positioned directly above said turret column, said second chain sheave being attached to the bottom surface of said weather deck;

a second chain jack positioned between said first chain sheave and said second chain sheave, said second chain jack being attached to the bottom surface of said weather deck;

a hook plate positioned within said turret column;

a mooring chain having one end thereof connected to the padeye of said counterweight and an opposite end thereof connected to said hook plate, said mooring chain extending from the padeye of said counterweight through said first chain jack, said first chain sheave, said second chain jack and said second chain sheave to said hook plate;

an anchor base positioned below said turret column;

first, second and third anchor chain legs for connecting said hook plate to said anchor base, said first, second and third anchor chain legs being spaced one from and another by an angle of approximately one hundred twenty degrees;

a sheave table mounted on the bottom of said turret column, said sheave table having first, second and third anchor chain sheaves, said first, second and third anchor chain sheaves being spaced one from another by said angle of approximately one hundred twenty degrees, each of said first, second and third anchor chain legs engaging only one of said first, second and third anchor chain sheaves of said sheave table.

11. The floating pier of claim 10 wherein said single point mooring anchor system further comprises a chain stopper attached to the bottom surface of said weather deck and engaging said mooring chain.

12. The floating pier of claim 9 wherein said adjustable seaward mooring system comprises:

first and second sheaves attached to the bottom surface of said weather deck;

first and second chain jacks attached to the top surface of said main deck, said first chain jack being positioned below said first sheave and said second chain jack being positioned below said second sheave;

third and fourth sheaves attached to the hull of said floating pierhead structure, said third sheave being positioned below said first chain jack and said fourth sheave being positioned below said second chain jack;

first and second anchors adapted to be fixed in position on the floor of said body of water; and

a continuous anchor line for connecting said first and second anchors, said continuous anchor line extending from said first anchor through said first, second, third and fourth sheaves and said first and second chain jacks to said second anchor.

13. A floating pier comprising:

a floating pierhead structure adapted to be floated on a body of water adjacent a shoreline, said floating pierhead structure comprising;

a hull floating on said body of water;

a weather deck mounted on a top portion of said hull, said weather deck having a generally semicircular shaped bow, said generally semicircular shaped bow including a semicircular shaped rail mounted on the top portion of said semicircular shaped bow;

a main deck positioned within said hull below said weather deck;

said main deck having a stern ramp receiving platform located at a seaward end of said floating pierhead structure, said stern ramp receiving platform being adapted to receive stern ramps from ocean going vessels equipped with said stern ramps;

a ramp communicating with said main deck and said weather deck to allow for a flow of vehicular traffic between said weather deck and said main deck;

an elevated approachway having one end thereof connected to said shoreline and an opposite end thereof connected to said floating pierhead structure;

said elevated approachway including a plurality of identical two lane wide roadway spans, a traffic bypass span and a gap closing span;

said traffic bypass span being positioned approximately at a midpoint of said elevated approachway;

said gap closing span being adapted to connect a portion of said elevated approachway extending from said shoreline to another portion of said elevated approachway extending from said floating pierhead structure when installation of said elevated approachway is complete;

a bridge span having one end fixedly connected to said elevated approachway and an opposite end riding on the semicircular shaped rail of said semicircular shaped bow;

said bridge span having a winch assembly communicating with the semicircular shaped rail of said semicircular shaped bow, said winch assembly operating as a drive source to facilitate rotational movement of said floating pierhead structure through a predetermined angle about said elevated approachway;

a single point mooring anchor system located at the semicircular shaped bow of said floating pierhead structure;

an adjustable seaward mooring system positioned at the seaward end of said floating pierhead structure, said single point mooring anchor system and said adjustable seaward mooring system allowing for orientation of said floating pierhead structure through said predetermined angle about said elevated approachway; and

a plurality of pedestal cranes located on a starboard side of said floating pierhead structure, said plurality of pedestal cranes being mounted on the weather deck of said floating pierhead structure.

14. The floating pier of claim 13 wherein each side of the hull of said floating pierhead structure includes a pair of thrusters with a first of said pair of thrusters being positioned within said hull at a fore end of said floating pierhead structure and a second of said pair of thrusters being positioned within said hull at an aft end of said floating pierhead structure.

15. The floating pier of claim 13 further comprising a plurality of skegs affixed to a bottom portion of said hull of said floating pierhead structure, said plurality of skegs being positioned at the seaward end of said hull.

16. The floating pier of claim 13 wherein said single point mooring anchor system comprises:

a counterweight slidably mounted within a counterweight housing located in a forward portion of the hull of said floating pierhead structure, said counterweight having a padeye affixed to the top of said counterweight;

a turret column positioned at the semicircular shaped bow of said floating pierhead structure, said turret column being rotationally mounted within said main deck to allow for rotational movement of said floating pierhead structure through said predetermined angle;

a bottom collar attached to said hull, said bottom collar being rotatably coupled to said turret column to allow said bottom collar to rotate about said turret column;

a first chain jack affixed to the upper surface of said main deck directly above said counterweight;

a first chain sheave positioned directly above said chain jack, said first chain sheave being attached to the bottom surface of said weather deck;

a second chain sheave positioned directly above said turret column, said second chain sheave being attached to the bottom surface of said weather deck;

a second chain jack positioned between said first chain sheave and said second chain sheave, said second chain jack being attached to the bottom surface of said weather deck;

a hook plate positioned within said turret column;

a mooring chain having one end thereof connected to the padeye of said counterweight and an opposite end thereof connected to said hook plate, said mooring chain extending from the padeye of said counterweight through said first chain jack, said first chain sheave, said second chain jack and said second chain sheave to said hook plate;

an anchor base positioned below said turret column;

first, second and third anchor chain legs for connecting said hook plate to said anchor base, said first, second and third anchor chain legs being spaced one from and another by an angle of approximately one hundred twenty degrees;

a sheave table mounted on the bottom of said turret column, said sheave table having first, second and third anchor chain sheaves, said first, second and third anchor chain sheaves being spaced one from another by said angle of approximately one hundred twenty degrees, each of said first, second and third anchor chain sheaves engaging only one of said first, second and third anchor chain legs of said sheave table.

17. The floating pier of claim 16 wherein said single point mooring anchor system further comprises a chain stopper attached to the bottom surface of said weather deck and engaging said mooring chain.

18. The floating pier of claim 13 wherein said adjustable seaward mooring system comprises:

first and second sheaves attached to the bottom surface of said weather deck;

first and second chain jacks attached to the top surface of said main deck, said first chain jack being positioned below said first sheave and said second chain jack being positioned below said second sheave;

third and fourth sheaves attached to the hull of said floating pierhead structure, said third sheave being positioned below said first chain jack and said fourth sheave being positioned below said second chain jack;

first and second anchors adapted to be fixed in position on the floor of said body of water; and

a continuous anchor line for connecting said first and second anchors, said continuous anchor line extending from said first anchor through said first, second, third and fourth sheaves and said first and second chain jacks to said second anchor.