KR20170036342A - Sub sea oil storage tank hybrid basic structure and construction method thereof - Google Patents

Sub sea oil storage tank hybrid basic structure and construction method thereof Download PDF

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Publication number
KR20170036342A
KR20170036342A KR1020150135396A KR20150135396A KR20170036342A KR 20170036342 A KR20170036342 A KR 20170036342A KR 1020150135396 A KR1020150135396 A KR 1020150135396A KR 20150135396 A KR20150135396 A KR 20150135396A KR 20170036342 A KR20170036342 A KR 20170036342A
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KR
South Korea
Prior art keywords
caisson
suction
oil storage
concrete
suction caisson
Prior art date
Application number
KR1020150135396A
Other languages
Korean (ko)
Inventor
박종식
강효동
류민철
장웅권
Original Assignee
대우조선해양 주식회사
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Application filed by 대우조선해양 주식회사 filed Critical 대우조선해양 주식회사
Priority to KR1020150135396A priority Critical patent/KR20170036342A/en
Publication of KR20170036342A publication Critical patent/KR20170036342A/en

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/10—Deep foundations
    • E02D27/18—Foundations formed by making use of caissons
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D23/00—Caissons; Construction or placing of caissons
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D23/00—Caissons; Construction or placing of caissons
    • E02D23/02—Caissons able to be floated on water and to be lowered into water in situ
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D23/00—Caissons; Construction or placing of caissons
    • E02D23/08—Lowering or sinking caissons
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D23/00—Caissons; Construction or placing of caissons
    • E02D23/16—Jointing caissons to the foundation soil, specially to uneven foundation soil
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/01—Flat foundations
    • E02D27/04—Flat foundations in water or on quicksand
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/32—Foundations for special purposes
    • E02D27/52—Submerged foundations, i.e. submerged in open water

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Revetment (AREA)

Abstract

The present invention relates to a seabed oil storage tank support type concrete caisson hybrid basic structure and a construction method thereof, wherein after a suction caisson is fixated to a seabed surface with vacuum pressure, and a concrete mattress is mounted on the suction caisson, the concrete mattress is fixated to the seabed surface with a pile to evenly transmit a load of a seabed oil storage tank to a soft stratum. Moreover, large scale subsidence can be prevented, and a scouring phenomenon around the seabed oil storage tank can be effectively prevented.

Description

Technical Field [0001] The present invention relates to a concrete caisson hybrid base structure for supporting a submarine oil storage tank,

The present invention relates to a concrete hybrid basic structure for supporting a submarine oil storage tank and a construction method thereof, and more particularly, to a concrete hybrid basic structure for supporting a submarine oil storage tank by fixing a suction caisson to a sea floor by using vacuum pressure and placing a concrete mattress on the suction caisson The present invention relates to a concrete hybrid basic structure for supporting a new concept submarine oil storage tank that fixes a concrete mattress to the sea floor with a microfiber, and a construction method thereof.

The rational concept of oil storage in the Arctic Circle is to avoid the collision with drift ice and the cold environment, which is shifting from floating oil storage to submarine oil storage.

In subsea oil storage, care must be taken to support the structure for subsea oil storage. This is because the load of the oil storage tank is transferred to the fragile layer of the seabed surface, and large scale settlement occurs, and a chain oyster occurs around the oil storage tank. Therefore, it is necessary to transmit the load of the oil storage tanks to the subsoil soft layer evenly, to prevent large scale settlement, and to prevent the shrinkage phenomenon around the tank.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a method for mounting a concrete mattress on a bottom surface of a suction caisson, A concrete hybrid hybrid foundation structure for supporting a new concept submarine oil storage tank capable of uniformly distributing the load of the oil storage tank to a weakly seawater layer, preventing large scale settlement, and effectively preventing the shrinkage phenomenon around the submarine oil storage tank And a method of constructing the same.

In order to solve the above-mentioned problems, the present invention provides a concrete hybrid foundation structure for supporting a submarine oil storage tank and a construction method thereof.

The present invention relates to a concrete hybrid basic structure for supporting a subsea oil storage tank, comprising: a suction caisson fixed to a seabed and equipped with a plurality of stiffeners for increasing a fixing force; And a concrete mattress installed on the upper part of the suction caisson and having a plurality of piles to be fixed to the seabed on the lower surface and a seabed oil storage tank supported on the upper surface.

The stiffener may be formed in an annular shape and radially disposed on the suction caisson.

And a plurality of concrete structures of the suction caisson are connected by wires.

According to another aspect of the present invention, there is provided a method of constructing a concrete caisson hybrid base structure for supporting a submarine oil storage tank, comprising: placing a suction caisson having a closed upper part with a lid and an open lower part into a seabed; Vacuuming the suction caisson with a pump through a suction hole of the suction caisson and fixing the suction caisson to the sea floor using the vacuum pressure; Removing the lid from the suction caisson; Placing a concrete mattress on top of the suction caisson; And securing the concrete mattress by piling a file of the concrete mattress onto the sea floor.

In the step of fixing the suction caisson to the sea floor, a stiffener radially disposed on the suction caisson is put on the sea floor.

As described above, since the suction caisson is firmly fixed to the sea floor by using the vacuum pressure, the concrete mattress is placed on the suction caisson, and then the concrete mattress is fixed to the sea floor by the pile, To an undersea-weak stratum, prevent large-scale settlement, and effectively prevent scouring around the subsea oil storage tanks.

1 is a perspective view showing a concrete caisson hybrid foundation structure for supporting a submarine oil storage tank according to the present invention;
2 is a plan view showing a concrete caisson hybrid foundation structure for supporting a submarine oil storage tank according to the present invention.
3 is a side view showing a concrete caisson hybrid foundation structure for supporting a subsea oil storage tank according to the present invention
Fig. 4 is a view showing the suction caisson seated on the sea floor
5 is a view for vacuuming the inside of the suction caisson
Fig. 6 is a view for fixing the suction caisson to the undersurface using vacuum pressure
Figure 7 is a view of seating a concrete mattress on top of a suction caisson
8 is a view for fixing a concrete mattress by piling a file on the sea floor
9 is a block diagram showing a method for constructing a concrete caisson hybrid foundation structure for supporting a submarine oil storage tank according to the present invention

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a concrete hybrid basic structure for supporting a submarine oil storage tank according to the present invention and a construction method thereof will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view showing a concrete caisson hybrid foundation structure for supporting a submarine oil storage tank according to the present invention, FIG. 2 is a plan view showing a concrete caisson hybrid foundation structure for supporting a submarine oil storage tank according to the present invention, and FIG. FIG. 4 is a view showing a suction caisson placed on a seabed surface, FIG. 5 is a view showing a vacuum in a suction caisson, FIG. 6 is a view showing a vacuum caisson hybrid structure for supporting a submarine oil storage tank, Fig. 7 is a view for placing a concrete mattress on top of a suction caisson, and Fig. 8 is a view for fixing a concrete mattress by putting a pile on the sea floor.

Referring to the drawings, a concrete hybrid foundation structure 100 for supporting a submarine oil storage tank according to the present invention includes a suction caisson 110 fixed to the sea floor, a suction caisson (not shown) for supporting a submarine oil storage tank T, And a concrete mattress 120 installed on an upper portion of the building.

The suction caisson 110 is formed in an annular shape, and a plurality of stiffeners (or wings) 111 may be radially formed on the suction caisson 110.

The stiffener suction caisson 110 has a role of enhancing the rigidity of the stiffener suction caisson 110, and is also attached to the bottom of the sea so that the suction caisson 110 is securely fixed to the sea floor.

The suction caisson 110 is formed in a structure in which the upper part and the lower part are both opened, and the upper part of the suction caisson 110 is kept closed by the lid 130 at the time of construction.

The suction caisson 110 is vacuumed by the pump P through the suction hole 131 formed in the lid 130 and the suction caisson 110 is fixed deeply on the sea floor using the vacuum pressure.

The concrete mattress 120 is formed in the form of a mat so that the bottom sea storage tank T is supported on the upper surface. The concrete mattress 120 may be constructed in a flexible structure in which a plurality of concrete blocks 121 are connected by wires 122.

A plurality of piles 123 may be installed on the lower surface of the concrete mattress 120 to be fixed to the sea floor, and the piles 123 may be installed to cross the lateral and vertical directions. Here, the file 123 can be a micro file or the like.

Meanwhile, FIG. 9 is a block diagram showing a method of constructing a concrete caisson hybrid base structure for supporting a submarine oil storage tank according to the present invention.

1 to 9, a method of constructing a concrete caisson hybrid foundation structure for supporting a submarine oil storage tank according to the present invention comprises: a step of installing a suction caisson 110 having an upper part closed with a lid 130 and an open lower part as a submarine (S110); A step (S 120) of vacuuming the suction caisson (110) with a pump through a suction hole (131) of the lid (130) and fixing the suction caisson (110) to the sea floor using the vacuum pressure; Removing (130) the lid (130) from the suction caisson (110); Placing (S140) the concrete mattress 120 on top of the suction caisson 110; And fixing the concrete mattress 120 by inserting the piles 123 of the concrete mattress 120 on the sea floor.

More specifically, in step S110, the suction caisson 110 is covered with a lid 130 and the lower part is opened, and the suction caisson 110 is submerged to the seafloor. At this time, the suction caisson 110 is gradually lowered to the sea bed by using a crane in the jack-up pants. When the suction caisson 110 is seated on the sea floor, a part of the suction caisson 110 is lowered by the own weight of the suction caisson 110, so that the inside of the suction caisson 110 can be a sealed space.

In step S120, the inside of the suction caisson 110 is sucked by the pump P through the suction hole 131 of the lid 130 to remove the seawater, so that the inside of the suction caisson 110 becomes vacuum , And the suction caisson 110 is fixed to the seabed surface using the generated vacuum pressure. At this time, the suction caisson 110 is more firmly fixed to the sea bed surface by the stiffener 111 radially disposed on the suction caisson 110. [

In step S 130, the pump P and the lid 130 are removed from the suction caisson 110.

In step S 140, the concrete mattress 120 is put into the seabed using a crane in the jack-up pants and is seated on the upper surface of the suction caisson 110.

Finally, in step S 150, the pile 123 of the concrete mattress 120 is placed on the sea floor to fix the concrete mattress 120, thereby completing the construction of the concrete caisson hybrid foundation structure. The upper surface of the concrete mattress 120 supports the submarine oil storage tank T.

As described above, since the suction caisson is firmly fixed to the sea floor by using the vacuum pressure, the concrete mattress is placed on the suction caisson, and then the concrete mattress is fixed to the sea floor by the pile, To an undersea-weak stratum, prevent large-scale settlement, and effectively prevent scouring around the subsea oil storage tanks.

100: Concrete Hybrid Foundation Structure for Supporting Submarine Oil Storage Tank
110: Suction Caisson
111: Stifter or wing
120: Concrete mattress
121: Concrete block
122: wire
123: File
130: lid
131: Suction hole
P: Pump
T: Subsea oil storage tank

Claims (5)

A suction caisson fixed to the seabed and equipped with a plurality of stiffeners to increase the fixing force; And
And a concrete mattress installed on an upper portion of the suction caisson and having a plurality of piles for supporting the bottom surface of the pavement and a bottom surface of which is supported by an underside oil storage tank. The method according to claim 1,
Wherein the suction caisson is formed in an annular shape and the stiffener is radially disposed on the suction caisson. ≪ RTI ID = 0.0 > 18. < / RTI > The method according to claim 1,
Wherein a plurality of the suction caissons are formed of a flexible structure in which the concrete is connected by wires. Placing a suction caisson with an upper part closed with a lid and an open lower part into a seabed and seated on the sea floor;
Vacuuming the inside of the suction caisson with a pump through a suction hole of the lid and fixing the suction caisson to the sea floor using the vacuum pressure;
Removing the lid from the suction caisson;
Placing a concrete mattress on top of the suction caisson; And
And securing the concrete mattress by inserting a pile of the concrete mattress onto the sea floor. The method for constructing a concrete caisson hybrid foundation structure for supporting a submarine oil storage tank. The method of claim 4,
In the step of fixing the suction caisson to the seabed,
Wherein a stiffener radially disposed on the suction caisson is put on the sea floor.
KR1020150135396A 2015-09-24 2015-09-24 Sub sea oil storage tank hybrid basic structure and construction method thereof KR20170036342A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114541460A (en) * 2022-01-25 2022-05-27 中交二公局第三工程有限公司 Cement tank foundation suitable for silt geology and construction method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114541460A (en) * 2022-01-25 2022-05-27 中交二公局第三工程有限公司 Cement tank foundation suitable for silt geology and construction method

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