A subsea oil storage tank foundation structure

Abstract

An underwater oil tank foundation structure can meet the modular layout requirements of underwater oil tanks. It includes piles, stabilizing columns, coamings, ramps, stabilizing frames, anti-sinking plates and other devices. The piles, ramps and coamings provide auxiliary support. At the same time, splicing them can realize the layout of different numbers of oil tanks on different seabed terrains. It is a low-cost layout solution for underwater oil storage systems.

Description

Technical Field

[0001] The invention relates to an underwater oil storage tank foundation structure, in particular to a foundation structure serving as a supporting facility for an underwater oil storage tank and providing support therefor. Background Art

[0002] my country has made increasing crude oil reserves and production a development strategy for the future, but my country's crude oil storage capacity is limited due to many reasons and a complete solution has not yet been formed. At the same time, as a crude oil importing country, my country has encountered situations where tankers cannot dock due to insufficient port acceptance capacity during several periods of crude oil imports, and the port's crude oil receiving capacity needs to be improved.

[0003] Underwater oil storage has been used to a certain extent abroad. Establishing an underwater oil storage system near the port can improve the port's ability to accept crude oil and can serve as a supplementary solution to improve my country's crude oil storage capacity. It is very necessary to carry out relevant research.

[0004] Underwater equipment requires a basic structure to support it on the seabed. As a heavy underwater equipment, underwater oil storage tanks require special research. Summary of the invention

[0005] In order to solve the problem of offshore layout of underwater oil storage systems, the present invention proposes an underwater oil storage tank foundation structure, which can meet the heavy weight support requirements of underwater oil storage tanks, facilitate the loading and unloading of crude oil by tankers, and will not affect the navigation of tankers.

[0006] The technical solution adopted by the present invention to solve its technical problems is: the present invention includes a pile column 1, a stabilizing column 2, a panel 3, a slope frame 4, a stabilizing frame 6, and a locking ring 7; the anti-sinking plate 5 is placed on the sea sand and the four panels 3; the stabilizing column 2 is sleeved on the pile column 1; the stabilizing columns 2 are connected by a stabilizing frame 6; the slope frame 4 is connected to the pile column 1 and the stabilizing column 2 on one side, and is connected to the panel 3 on the other side.

[0007] The basic structure adopts modular design, the anti-sinking plates can be spliced ​​and installed, and can be arranged according to the underwater terrain. At the same time, the mixed design of pile foundation, anti-sinking plate and skirt plate is adopted to meet the heavy weight support requirements of underwater oil storage tanks. In addition, the main structure of the present invention is arranged below the seabed, and the oil storage tank will not affect the navigation of the ship.

[0008] The beneficial effects of the present invention are as follows: the present invention makes it possible to arrange the underwater oil storage system offshore, and can be arranged in a personalized and modular manner according to different seabed topography, with low seabed construction costs, and its arrangement does not affect the navigation of ships. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a rendering of the present invention.

[0010] Figure 2 It is a schematic diagram of a pile column of the present invention.

[0011] Figure 3 It is a schematic diagram of a stabilizing column of the present invention.

[0012] Figure 4 It is a schematic diagram of the enclosure of the present invention.

[0013] Figure 5 It is a schematic diagram of a slope frame of the present invention.

[0014] Figure 6 It is a schematic diagram of the anti-sinking plate of the present invention.

[0015] Figure 7 It is a schematic diagram of the stabilizing frame of the present invention.

[0016] Figure 8 , 9 It is a schematic diagram of the connection structure of the stabilizing column and other devices of the present invention.

[0017] Fig.10 It is a schematic diagram of the connection structure of the ramp and other devices of the present invention.

[0018] Among them, 1. Pile column, 1-1. Upper pile column, 1-2. Pile column bearing platform, 1-3. Pile teeth, 1-4 Pile legs, 1-5. Pile column reinforcement plate, 2. Stable column, 2-1. Stable column bearing platform, 2-2. Stable column pile teeth, 2-3. Stable column threaded hole, 2-4. Stable column reinforcement plate, 2-5 Stable column legs, 3. Enclosure, 3-1. Enclosure beam, 3-2. Enclosure skirt, 3-3. Enclosure groove, 3-4. Enclosure reinforcement rib , 3-5, anti-sinking plate of the enclosure, 4, slope frame, 4-1, main beam of the slope frame, 4-2, groove of the slope frame, 4-3, inclined beam of the slope frame, 4-4, anti-sinking plate of the slope frame, 4-5, skirt of the slope frame, 4-6, anti-sinking plate of the main beam of the slope frame, 4-7, pile teeth of the slope frame, 4-8, mud wedges of the slope frame, 4-9, threaded holes of the slope frame, 5, anti-sinking plate, 5-1, skirt of the anti-sinking plate, 6, stabilizing frame, 6-1, groove of the stabilizing frame, 7, locking ring, 8, underwater oil storage tank. DETAILED DESCRIPTION

[0019] like Figure 2 As shown, the upper part of the pile column 1 is the upper pile column 1-1, which is a cylinder, and the middle part is the pile column bearing platform 1-2, which is the main load-bearing structure of the pile column 1. The pile column bearing platform 1-2 has a pile tooth 1-3, which is a cubic structure. The lower part of the pile column 1 is a cylindrical pile leg 1-4, and the outer side is a pile column reinforcement plate 1-5.

[0020] like Figure 3As shown, the upper part of the stabilizing column 2 is a stabilizing column bearing platform 2-1, and also includes a stabilizing column post tooth 2-2. There are stabilizing column threaded holes 2-3 on the top of the stabilizing column bearing platform 2-1 and the stabilizing column post tooth 2-2, which are evenly distributed along the circumference of the stabilizing column bearing platform 2-1, and the number is 8. The lower part of the stabilizing column 2 is a stabilizing column leg 2-5, and the middle part is provided with a stabilizing column reinforcement plate 2-4, which plays a role in improving the strength between the stabilizing column bearing platform 2-1 and the stabilizing column leg 2-5.

[0021] like Figure 4 As shown, the main structure of the enclosure 3 is penetrated by the enclosure beam 3-1, and the enclosure grooves 3-3 are on both sides of the enclosure beam 3-1, which are adapted to the shape and size of the pile teeth 1-3 and the stabilizing column pile teeth 2-2. Below the enclosure beam 3-1 is the enclosure anti-sinking plate 3-5, which is a plate structure with through holes and chamfers at the four corners. The enclosure anti-sinking plate 3-5 has enclosure reinforcement ribs 3-4 connected to the enclosure beam 3-1. Below the enclosure anti-sinking plate 3-5 is the enclosure skirt 3-2, which is a plate structure with the same length as the enclosure anti-sinking plate 3-5 and perpendicular to the enclosure anti-sinking plate 3-5.

[0022] like Figure 5 As shown, the main structure of the slope frame 4 is that the slope frame diagonal beam 4-3 constitutes the triangle hypotenuse, and the slope frame main beam 4-1 constitutes the triangle right angle side and extends outside the triangle, and the slope frame main beam 4-1 is connected with two vertical beams between the slope frame diagonal beam 4-3. There is a slope frame anti-sinking plate 4-4 on the lower side of the slope frame diagonal beam 4-3, which is a rectangular plate with through holes, and there is a triangular reinforcing rib between the slope frame diagonal beam 4-3 and the slope frame anti-sinking plate 4-4 to increase its structural strength. There is a slope frame skirt 4-5 below the slope frame anti-sinking plate 4-4, which is a trapezoidal plate structure. The slope frame main beam 4-1 extends the triangle outside part to connect the slope frame main beam anti-sinking plate 4-6, which is a plate structure with through holes, and there is a triangular reinforcing rib that is connected to the slope frame main beam 4-1. The lower side of the anti-sinking plate 4-6 of the ramp frame main beam is a ramp frame mud wedge 4-8, which has a triangular cross-section and extends beyond the end of the ramp frame main beam 4-1, and includes an extended structure with a triangular cross-section in a direction perpendicular to the ramp frame main beam 4-1. The end of the ramp frame mud wedge 4-8 has three ramp frame pile teeth 4-7, whose size and shape are the same as the pile teeth 1-3 and the stabilizing column pile teeth 2-2. There are 4 identical ramp frame threaded holes 4-9 on the ramp frame pile teeth 4-7 and the ramp frame main beam 4-1, and the 4 ramp frame threaded holes 4-9 are on the circumference of the same circle. There are two ramp frame grooves 4-2 on one side of the ramp frame main beam 4-1 and the ramp frame inclined beam 4-3, and their shape and size are the same as the enclosure groove 3-3.

[0023] like Figure 6 As shown, the anti-sinking plate 5 is a square plate structure with through holes, and an anti-sinking plate skirt 5-1 is arranged below the anti-sinking plate. Different from the general anti-sinking plate, the anti-sinking plate 5 is a stepped plate structure, and has a protruding edge along the upper surface.

[0024] like Figure 1 , 7As shown, the stabilizing frame 6 is a reinforcing device connected to the stabilizing column 2, and has stabilizing frame grooves 6-1 at both ends. The structure is no different from the enclosure groove 3-3 and the slope frame groove 4-2.

[0025] like Figure 1 , 2 , 3, 4, 5, 6, 7, 8, 9, and 10, during the layout of the oil storage system, it is first necessary to carry out underwater construction according to the seabed terrain and the requirements of the oil storage system. In order not to affect the navigation of ships, the overall oil storage system is arranged under the seabed, and a large pit of a certain depth needs to be excavated. For the seabed terrain with a slope, it can be modified into a stepped platform through construction. During the installation process, first locate and install the pile column 1, and insert it into the sea sand through a pile driver until the pile leg 1-4 below the pile tooth 1-3 is fully inserted. The role of the pile column reinforcement plate 1-5 is to strengthen the firmness between the pile column 1 and the sea sand. Then install the enclosure 3, install the enclosure groove 3-3 on the pile tooth 1-3, and insert the enclosure skirt 3-2 below the enclosure anti-sinking plate 3-5 into the sea sand. Next, install the stabilizing column 2, put the stabilizing column 2 on the upper pile column 1-1, and the stabilizing column leg 2-5 sits on the pile column bearing platform 1-2. This step also limits the movement of the enclosure groove 3-3. During installation, it is necessary to ensure that the stabilizing column pile teeth 2-2 and the pile teeth 1-3 are installed at the corresponding positions in the vertical direction. When there is a stepped platform in the seabed construction, the slope frame 4 is a device installed at the stepped position, which needs to be installed at the same time as the stabilizing column 2. First, the slope frame groove 4-2 on the upper side of the slope frame 4 is installed on the stabilizing column pile teeth 2-2, then the stabilizing column 2 and the slope frame 4 are lowered at the same time, the stabilizing column legs 2-5 sit on the pile column bearing platform 1-2, and the slope frame groove 4-2 on the lower side of the slope frame 4 is installed on the pile teeth 1-3. When the slope frame 4 is installed, the slope frame anti-sinking plate 4-4 covers the slope, the slope frame skirt 4-5 below it is inserted into the sea sand of the slope, and the slope frame main beam anti-sinking plate 4-6 covers the sea sand of the previous stepped platform, and the slope frame mud wedge 4-8 is inserted into the sea sand of the previous stepped platform. The foundation structure of the previous seabed stepped platform is installed, the enclosure groove 3-3 is installed on the slope frame pile teeth 4-7, and the other installation processes are the same. The foundation structure of the previous seabed step platform is installed. The foundation structure near the edge of the step platform is connected to the slope frame 4 on one side and the pile column 1 on the other side. The next step is to install the anti-sinking plate 5, which is installed in the square area surrounded by four enclosures 3. The protruding edge of the step-shaped structure of the anti-sinking plate 5 covers the enclosure anti-sinking plate 3-5, and the enclosure 3 has a supporting effect on the anti-sinking plate 5. After the installation is completed, the anti-sinking plate skirt 5-1 is inserted into the sea sand. Then the stabilizing frame 6 is installed, and the stabilizing frame groove 6-1 is installed on the stabilizing column pile tooth 2-2. Finally, a locking ring 7 is installed on each stabilizing column 2 and the slope frame 4. It is an annular structure with a threaded hole, and the position and size of the threaded hole correspond to the threaded hole 2-3 of the stabilizing column and the threaded hole 4-9 of the slope frame. Use bolts to install the locking ring 7 on the stabilizing column 2 and the slope frame 4. 8 bolts are required for installation on the stabilizing column 2, and 4 bolts are required for installation on the slope frame 4. The foundation structure is installed, and the underwater oil storage tank 8 is finally arranged.

[0026] The enclosure anti-sinking plates 3-5, anti-sinking plates 4-4, slope frame main beam anti-sinking plates 4-6, and anti-sinking plates 5 involved in the present invention all have through holes, which function to facilitate the flow of seawater, the same as the through holes on general anti-sinking plates, to ensure that the above-mentioned devices are better fitted on the sea sand. The pile column reinforcement plates 1-5, enclosure skirt plates 3-2, slope frame skirt plates 4-5, anti-sinking plate skirt plates 5-1, and slope frame mud wedges 4-8 involved in the present invention all function to be inserted into the sea sand, fix the device position and enhance the device bearing capacity.

[0027] Figure 1 The figure shows a layout of the present invention. In actual use, according to the number of underwater oil storage tanks and the seabed topography, the piles 1, the stabilizing columns 2, the enclosures 3, the ramps 4, the anti-sinking plates 5, etc. can be spliced ​​to meet the personalized and modular layout requirements of the underwater oil storage system.

Claims

1. An underwater oil storage tank foundation structure, characterized by: It comprises a pile column (1), a stabilizing column (2), a panel (3), a slope frame (4), an anti-sinking plate (5), a stabilizing frame (6), and a locking ring (7); the anti-sinking plate (5) is placed on the sea sand and the four panels (3); the stabilizing column (2) is sleeved on the pile column (1); and the stabilizing columns (2) are connected to each other via the stabilizing frame (6); The upper part of the pile column (1) is an upper pile column (1-1) which is a cylinder, and the middle part is a pile column bearing platform (1-2) which is the main load-bearing structure of the pile column (1); the lower part of the pile column (1) is a pile leg (1-4) which is a cylinder, and the outer side is a pile column reinforcement plate (1-5); The upper part of the stabilizing column (2) is a stabilizing column bearing platform (2-1), and also includes a stabilizing column post tooth (2-2). There are stabilizing column threaded holes (2-3) on the top of the stabilizing column bearing platform (2-1) and the stabilizing column post tooth (2-2), and the stabilizing column threaded holes (2-3) are evenly distributed along the circumference of the stabilizing column bearing platform (2-1); the lower part of the stabilizing column (2) is a stabilizing column leg (2-5), and there is a stabilizing column reinforcement plate (2-4) in the middle, which plays a role in increasing the strength between the stabilizing column bearing platform (2-1) and the stabilizing column leg (2-5); The main structure of the enclosure (3) is penetrated by an enclosure beam (3-1), and enclosure grooves (3-3) are formed on both sides of the enclosure beam (3-1); Insert the pile column (1) into the sea sand, install the enclosure (3), and install the enclosure groove (3-3) on the pile tooth (1-3); put the stabilizing column (2) on the upper pile column (1-1), and the stabilizing column leg (2-5) sits on the pile column bearing platform (1-2); When there is a stepped platform during seabed construction, the ramp frame (4) is a device installed at the stepped position, and needs to be installed simultaneously with the stabilizing column (2); one side of the ramp frame (4) is connected to the pile column (1) and the stabilizing column (2), and the other side is connected to the enclosure (3); The main structure of the slope frame (4) is that the slope frame inclined beam (4-3) forms the hypotenuse of the triangle, and the slope frame main beam (4-1) forms the right angle side of the triangle and extends outside the triangle; the slope frame main beam (4-1) extends outside the triangle and is connected to the slope frame main beam anti-sinking plate (4-6); the lower side of the slope frame main beam anti-sinking plate (4-6) is a slope frame mud wedge (4-8); the end of the slope frame mud wedge (4-8) is provided with three slope frame pile teeth (4-7); the slope frame pile teeth (4-7) and the slope frame main beam (4-1) have a total of four identical slope frame threaded holes (4-9), and the four slope frame threaded holes (4-9) are on the circumference of the same circle; The locking ring (7) is an annular structure with a threaded hole, and the position and size of the threaded hole correspond to the threaded hole (2-3) of the stabilizing column and the threaded hole (4-9) of the ramp frame. The locking ring (7) is installed on the stabilizing column (2) and the ramp frame (4) using bolts. The installation on the stabilizing column (2) requires 8 bolts, and the installation on the ramp frame (4) requires 4 bolts.

2. The underwater oil storage tank foundation structure according to claim 1 is characterized in that: The pile column (1) comprises an upper pile column (1-1), a pile column bearing platform (1-2), pile teeth (1-3), pile legs (1-4), and a pile column reinforcement plate (1-5); the upper part of the pile column (1) is the upper pile column (1-1), which is a cylinder, and the middle part is the pile column bearing platform (1-2), which is the main load-bearing structure of the pile column (1); the pile teeth (1-3) are arranged on the pile column bearing platform (1-2), which are cubic structures; the lower part of the pile column (1) is a cylindrical pile leg (1-4), and the outer side is a pile column reinforcement plate (1-5).

3. The underwater oil storage tank foundation structure according to claim 1 is characterized in that: The enclosure (3) comprises an enclosure beam (3-1), an enclosure skirt (3-2), an enclosure groove (3-3), and an enclosure anti-sinking plate (3-5); the enclosure groove (3-3) is adapted in shape and size to the pile teeth (1-3) and the stabilizing column pile teeth (2-2); the enclosure anti-sinking plate (3-5) is disposed below the enclosure beam (3-1), and is a plate structure with through holes and chamfered corners; the enclosure anti-sinking plate (3-5) is provided with an enclosure reinforcement rib (3-4) connected to the enclosure beam (3-1); and the enclosure skirt (3-2) is disposed below the enclosure anti-sinking plate (3-5), and is a plate structure having a length equal to that of the enclosure anti-sinking plate (3-5) and being perpendicular to the enclosure anti-sinking plate (3-5).

4. The underwater oil storage tank foundation structure according to claim 1 is characterized in that: The slope frame (4) comprises a slope frame main beam (4-1), a slope frame groove (4-2), a slope frame inclined beam (4-3), a slope frame anti-sinking plate (4-4), a slope frame skirt plate (4-5), a slope frame main beam anti-sinking plate (4-6), a slope frame pile tooth (4-7) and a slope frame mud wedge (4-8); Two vertical beams are connected between the main beam (4-1) and the inclined beam (4-3) of the slope frame; a slope frame anti-sinking plate (4-4) is provided at the lower side of the inclined beam (4-3), which is a rectangular plate with a through hole; triangular reinforcing ribs are provided between the inclined beam (4-3) and the anti-sinking plate (4-4) to increase the structural strength; a slope frame skirt plate (4-5) is provided below the anti-sinking plate (4-4), which is a trapezoidal plate structure; the anti-sinking plate (4-6) of the main beam of the slope frame is a plate structure with a through hole, and triangular reinforcing ribs are provided on it to connect with the main beam (4-1); the cross section of the slope frame mud wedge (4-8) is triangular, extends to the outside of the end of the main beam (4-1), and includes an extension structure with a cross section of a triangle in a direction perpendicular to the main beam (4-1); the size and shape of the slope frame pile teeth (4-7) are the same as those of the pile teeth (1-3) and the stabilizing column pile teeth (2-2).

5. The underwater oil storage tank foundation structure according to claim 1 is characterized in that: Both ends of the stabilizing frame (6) are stabilizing frame slots (6-1).

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