CN213867897U - Split type high-pile bearing platform foundation for large-scale offshore electrical platform - Google Patents
Split type high-pile bearing platform foundation for large-scale offshore electrical platform Download PDFInfo
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- CN213867897U CN213867897U CN202021585604.4U CN202021585604U CN213867897U CN 213867897 U CN213867897 U CN 213867897U CN 202021585604 U CN202021585604 U CN 202021585604U CN 213867897 U CN213867897 U CN 213867897U
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Abstract
The utility model provides a split type high pile cap basis for large-scale offshore electric platform, including at least two high pile caps, high pile cap is supported by at least one vertical pile and at least two slant stake, the pile bolck of slant stake buries into the concrete to high pile cap, and a plurality of slant stakes form the support to vertical stake to the center department, be equipped with the vertical post that supports the upper portion chunk above the high pile cap, vertical stake from bottom to top passes high pile cap and welds with vertical post; and no connecting component is arranged between the high pile cap platforms to form a ship entering space. The utility model discloses a split type high pile cap is about to high pile cap of tradition divide into a plurality of high pile caps of independent atress, and vertical power, horizontal force and the moment of flexure that upper portion chunk transmitted can all be independently undertaken to every cushion cap, also can independently undertake the wave power of self, the ocean current effect. The size of the bearing platform is no longer related to the size of the upper block, so that the unnecessary engineering amount of the bearing platform is reduced, and the weight of the bearing platform is reduced.
Description
Technical Field
The utility model relates to a split type high pile cushion cap basis for large-scale offshore electrical platform is applicable to offshore wind power generation field, the split type high pile cushion cap basis of large-scale offshore booster station, offshore converter station of specially adapted.
Background
Offshore wind power generation is a new industry and has developed rapidly in recent years. In order to transmit the electric energy generated by offshore wind power to land, an offshore electric platform (an ac offshore booster station or an ac-to-dc offshore converter station) needs to be constructed at sea. The foundation of the large offshore electrical platform directly bears external loads such as wave force, ocean current force, ship leaning force and the like besides supporting the upper chunk, construction needs to be considered to be simple and rapid as much as possible, the construction cost is low, and in addition, when the weight of the offshore electrical platform exceeds 1 ten thousand tons, the foundation needs to be suitable for installation of a floating method, and a space needs to be reserved for ship entering of the floating method.
Conventional offshore electrical platforms typically employ a jacket foundation. When the upper module block is hoisted, a jacket foundation is generally arranged at the middle part of the platform; when the upper module is floatingly installed, jacket foundations are generally provided on both sides of the platform. The jacket foundation is all steel structure, and the sleeve pipe pile inserting is reserved, and the pile is connected with the jacket through grouting. The jacket foundation is commonly used, but has the defects of large steel consumption, high manufacturing cost, need of a large crane ship during construction and the like.
The conventional offshore booster station also adopts a small amount of high-pile bearing platform foundations, the conventional high-pile bearing platform foundations are generally single foundations, and the offshore booster station is suitable for small offshore platforms, cannot adapt to large-scale platforms, and cannot meet the ship-entering requirements during installation by a floating-supporting method. The traditional high pile cap and the upper block are connected by adopting a reserved cup mouth plugging technology, and when the weight of the upper block is larger, the bearing capacity of a cup mouth foundation cannot be met, so that a foundation connection with larger bearing capacity is needed.
Therefore, it is desirable to provide a split high pile cap foundation for large offshore electrical platforms.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a split type high pile cap basis for large-scale marine electrical platform to the not enough of existence among the prior art.
To this end, the above object of the present invention is achieved by the following technical solutions:
the utility model provides a split type high pile cap basis for large-scale offshore electric platform which characterized in that: the split type high pile cap foundation for the large offshore electrical platform comprises at least two high pile caps, each high pile cap is supported by at least one vertical pile and at least two inclined piles, pile tops of the inclined piles are embedded into concrete of the high pile cap, the inclined piles form a support for the vertical piles to the center, vertical columns for supporting upper chunks are arranged above the high pile caps, and the vertical piles penetrate through the high pile caps from bottom to top and are welded with the vertical columns; and no connecting component is arranged between the high pile cap platforms to form a ship entering space.
When adopting above-mentioned technical scheme, the utility model discloses can also adopt or make up and adopt following technical scheme:
as the utility model discloses a preferred technical scheme: a stiffening ring is arranged on the pile body of the vertical pile, and the stiffening ring is arranged in the center of the vertical pile in the thickness direction of the high pile cap; the outer diameter of the stiffening ring is larger than the outer diameter of the pile body of the vertical pile and is embedded into concrete of the high pile cap.
As the utility model discloses a preferred technical scheme: the side of the pile top of the oblique pile is provided with a stiffening ring, and the outer diameter of the stiffening ring is larger than the outer diameter of the pile body of the oblique pile and is embedded into the concrete of the high pile cap.
As the utility model discloses a preferred technical scheme: the upper portion of the stiffening ring on the top of the oblique pile is provided with a reinforcing mesh, the outer side of the oblique pile in the high pile bearing platform is provided with a reverse column type reinforcing steel bar, and the reverse column type reinforcing steel bar is welded with the reinforcing mesh to form surrounding of the stiffening ring on the top of the oblique pile. The reverse column type reinforcing steel bars are similar to common cylindrical reinforcing steel bars and are composed of vertical reinforcing steel bars and annular stirrups, the configured positions of the reverse column type reinforcing steel bars are opposite to those of the cylindrical reinforcing steel bars, and the reverse column type reinforcing steel bars are configured in a high pile cap outside the vertical pile.
As the utility model discloses a preferred technical scheme: and filling core concrete into the part of the inclined pile, which is positioned in the high pile cap, so as to enhance the lateral pressure resistance of the pile body of the inclined pile.
As the utility model discloses a preferred technical scheme: and filling core concrete into the part of the vertical pile, which is positioned on the high pile cap, so as to enhance the lateral pressure resistance of the pile body of the vertical pile.
As the utility model discloses a preferred technical scheme: the lower surface of the vertical pile core filling concrete is provided with a closed bottom plate, and the closed bottom plate is arranged on a pre-installed annular bracket in the vertical pile.
As the utility model discloses a preferred technical scheme: the top surface of the core filling concrete is flush with the top surface of the high pile cap, and the bottom surface of the core filling concrete is located 1 time of the outer diameter of the pile body of the vertical pile below the bottom surface of the high pile cap.
As the utility model discloses a preferred technical scheme: and reverse column type reinforcing steel bars are arranged on the outer sides of the vertical piles in the high pile cap.
As the utility model discloses a preferred technical scheme: and the reverse column type reinforcing steel bars form cross welding at stiffening rings on the pile body of the vertical pile.
The utility model provides a split type high pile cap basis for large-scale offshore electrical platform has following technological effect:
(1) adopts a split type high pile cap technology. The traditional high pile cap is divided into a plurality of independently stressed high pile caps, and each high pile cap can independently bear vertical force, horizontal force and bending moment transmitted by the upper module and can also independently bear own wave force and ocean current force. The size of the bearing platform is no longer related to the size of the upper block, so that the unnecessary engineering amount of the bearing platform is reduced, and the weight of the bearing platform is reduced. The high pile bearing platforms are not provided with connecting members, so that a space for entering and exiting the installation ship is formed between the high pile bearing platforms, and the high pile bearing platforms can be suitable for entering the ship during installation by a floating support method.
(2) The direct butt joint technology of the pile is adopted. The vertical column of the upper module block is directly butted with the vertical pile of the lower module block, force is not transferred through bearing platform concrete, the load transfer mode is simple and reliable, the vertical force of the vertical column is directly transferred to the vertical pile of the lower module block, and the bending moment and the horizontal force of the vertical column are transferred to the oblique pile through the high pile bearing platform.
(3) And (3) adopting a pile body stiffening technology. The pile body is made of steel, the steel and the concrete cannot be tightly connected, a gap must exist between the pile body and the concrete of the high pile bearing platform, and the gap enables the vertical pile and the high pile bearing platform to be incapable of directly transmitting force. A stiffening ring is arranged on the vertical pile body, and the position of the stiffening ring is approximately located in the middle of the bearing platform in the thickness direction. The stiffening ring external diameter is bigger than pile body external diameter, and the stiffening ring is buried in the cushion cap concrete, can undertake the effect of vertical force, consequently, the stiffening ring is used for the transmission of vertical force between vertical pile and high pile bearing platform.
(4) The pile body core filling technology is adopted. And filling core concrete in the height range from the position about 1 time of the diameter of the pile body below the bottom surface of the bearing platform of the pile body to the top surface of the bearing platform. The strength grade of the core filling concrete is similar to that of the bearing platform concrete, but a small amount of expanding agent is doped into the core filling concrete, so that the core filling concrete generates 0.05-0.2% volume expansion during curing, the core filling concrete is in close contact with the inner wall of the pile, and the lateral force pressure of the pile body can be directly transmitted to the core filling concrete. After the pile is filled with concrete, the lateral pressure resistance of the pile body is greatly improved.
(5) The technique of arranging reversed column type steel bars on a bearing platform is adopted. The lateral bearing capacity of the concrete of the bearing platform is enhanced, the concrete is prevented from being pressed and bent under the lateral pressure, and the bending moment and the horizontal force of the pile body are reliably transmitted to the bearing platform.
(6) By adopting the split type high pile cap technology, the stress of the upper module tends to be reasonable, and the overhung is avoided.
Drawings
Fig. 1 is a front view of a split type high pile cap foundation for a large offshore electrical platform provided by the present invention;
fig. 2 is a top view of the split type high pile cap foundation for the large offshore electrical platform provided by the present invention;
FIG. 3 is a layout view of vertical piles and a high pile cap;
FIG. 4 is a layout view of the slant piles and the high pile caps;
in the figure: 1-upper block; 2-high pile cap; 3-vertical columns; 4-oblique piles; 5-vertical piles; 6-a stiffening ring; 7-filling core concrete; 8-sealing the bottom plate; 9-reversed column type steel bars; and 10-reinforcing mesh.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-2, a split type high pile cap 2 foundation for a large offshore electrical platform comprises 6 high pile caps 2, each high pile cap 2 is supported by 2 vertical piles 5 and 4 oblique piles 4, the pile tops of the oblique piles 4 are embedded into concrete of the high pile cap 2, the 4 oblique piles 4 form a support for the vertical piles 5 towards the center, a vertical column 3 for supporting an upper module 1 is arranged above the high pile cap 2, and the vertical piles 5 penetrate through the high pile caps 2 from bottom to top and are welded with the vertical columns 3; no connecting member is provided between the high pile caps 2 to form a space for entry.
In this embodiment: as shown in fig. 3, a stiffening ring 6 is arranged on the pile body of the vertical pile 5, and the stiffening ring 6 is arranged at the central position of the vertical pile 5 in the thickness direction of the high pile cap 2; the outer diameter of the stiffening ring 6 is larger than the outer diameter of the pile body of the vertical pile 5 and is embedded into the concrete of the high pile cap 2. The part of the vertical pile 5 positioned on the high pile cap 2 is filled with core filling concrete 7 to enhance the lateral pressure resistance of the pile body of the vertical pile 5. The lower surface of the core concrete 7 filled in the vertical piles 5 is provided with a closed bottom plate 8, and the closed bottom plate 8 is arranged on a pre-installed annular bracket in the vertical piles 5. The top surface of the core filling concrete 7 is flush with the top surface of the high pile cap 2, and the bottom surface of the core filling concrete 7 is positioned at the position 1 time of the outer diameter of the pile body of the vertical pile 5 below the bottom surface of the high pile cap 2. The outside of vertical pile 5 in high pile cap 2 sets up reverse column formula reinforcing bar 9. The reversed column type steel bars 9 form cross welding at the stiffening ring 6 on the pile body of the vertical pile 5.
In this embodiment: as shown in fig. 4, a stiffening ring 6 is disposed on a side surface of a pile top of the oblique pile 4, and the outer diameter of the stiffening ring 6 is larger than the outer diameter of a pile body of the oblique pile 4 and is embedded in the concrete of the high pile cap 2. A reinforcing mesh 10 is arranged above the stiffening ring 6 on the pile top of the oblique pile 4, a reversed column type reinforcing steel bar 9 is arranged outside the oblique pile 4 in the high pile bearing platform 2, and the reversed column type reinforcing steel bar 9 is welded with the reinforcing mesh 10 to form an enclosure for the stiffening ring 6 on the pile top of the oblique pile 4; the part of the inclined pile 4 positioned on the high pile cap 2 can be filled with core filling concrete 7 to enhance the lateral pressure resistance of the pile body of the inclined pile, in addition, a closed bottom plate 8 can be arranged on the lower surface of the core filling concrete 7 in the inclined pile 4, and the closed bottom plate 8 is arranged on a pre-installed annular bracket in the inclined pile.
The above-mentioned embodiments are only for explaining the preferred embodiments of the present invention, and not for limiting the present invention, and any modifications, equivalent replacements, improvements, etc. made by the present invention fall within the protection scope of the present invention within the spirit and the protection scope of the claims.
Claims (10)
1. The utility model provides a split type high pile cap basis for large-scale offshore electric platform which characterized in that: the split type high pile cap foundation for the large offshore electrical platform comprises at least two high pile caps, each high pile cap is supported by at least one vertical pile and at least two inclined piles, pile tops of the inclined piles are embedded into concrete of the high pile cap, the inclined piles form a support for the vertical piles to the center, vertical columns for supporting upper chunks are arranged above the high pile caps, and the vertical piles penetrate through the high pile caps from bottom to top and are welded with the vertical columns; and no connecting component is arranged between the high pile cap platforms to form a ship entering space.
2. The split high pile cap foundation for large offshore electrical platform of claim 1, wherein: a stiffening ring is arranged on the pile body of the vertical pile, and the stiffening ring is arranged in the center of the vertical pile in the thickness direction of the high pile cap; the outer diameter of the stiffening ring is larger than the outer diameter of the pile body of the vertical pile and is embedded into concrete of the high pile cap.
3. The split high pile cap foundation for large offshore electrical platform of claim 1, wherein: the side of the pile top of the oblique pile is provided with a stiffening ring, and the outer diameter of the stiffening ring is larger than the outer diameter of the pile body of the oblique pile and is embedded into the concrete of the high pile cap.
4. The split high pile cap foundation for large offshore electrical platform of claim 3, wherein: the upper portion of the stiffening ring on the top of the oblique pile is provided with a reinforcing mesh, the outer side of the oblique pile in the high pile bearing platform is provided with a reverse column type reinforcing steel bar, and the reverse column type reinforcing steel bar is welded with the reinforcing mesh to form surrounding of the stiffening ring on the top of the oblique pile.
5. The split high pile cap foundation for large offshore electrical platform according to claim 1 or 4, wherein: and filling core concrete into the part of the inclined pile, which is positioned in the high pile cap, so as to enhance the lateral pressure resistance of the pile body of the inclined pile.
6. The split high pile cap foundation for large offshore electrical platform of claim 1, wherein: and filling core concrete into the part of the vertical pile, which is positioned on the high pile cap, so as to enhance the lateral pressure resistance of the pile body of the vertical pile.
7. The split high pile cap foundation for large offshore electrical platform of claim 6, wherein: the lower surface of the vertical pile core filling concrete is provided with a closed bottom plate, and the closed bottom plate is arranged on a pre-installed annular bracket in the vertical pile.
8. The split high pile cap foundation for large offshore electrical platform according to claim 6 or 7, wherein: the top surface of the core filling concrete is flush with the top surface of the high pile cap, and the bottom surface of the core filling concrete is located 1 time of the outer diameter of the pile body of the vertical pile below the bottom surface of the high pile cap.
9. The split high pile cap foundation for large offshore electrical platform of claim 1, wherein: and reverse column type reinforcing steel bars are arranged on the outer sides of the vertical piles in the high pile cap.
10. The split high pile cap foundation for large offshore electrical platform of claim 9, wherein: and the reverse column type reinforcing steel bars form cross welding at stiffening rings on the pile body of the vertical pile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021585604.4U CN213867897U (en) | 2020-08-04 | 2020-08-04 | Split type high-pile bearing platform foundation for large-scale offshore electrical platform |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021585604.4U CN213867897U (en) | 2020-08-04 | 2020-08-04 | Split type high-pile bearing platform foundation for large-scale offshore electrical platform |
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| CN213867897U true CN213867897U (en) | 2021-08-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114059572A (en) * | 2020-08-04 | 2022-02-18 | 中国电建集团华东勘测设计研究院有限公司 | Split type high-pile bearing platform foundation for large offshore electrical platform and establishing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114059572A (en) * | 2020-08-04 | 2022-02-18 | 中国电建集团华东勘测设计研究院有限公司 | Split type high-pile bearing platform foundation for large offshore electrical platform and establishing method |
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