CN217580255U - Disassembly-free offshore cast-in-place concrete bearing platform foundation - Google Patents
Disassembly-free offshore cast-in-place concrete bearing platform foundation Download PDFInfo
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- CN217580255U CN217580255U CN202221187655.0U CN202221187655U CN217580255U CN 217580255 U CN217580255 U CN 217580255U CN 202221187655 U CN202221187655 U CN 202221187655U CN 217580255 U CN217580255 U CN 217580255U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/727—Offshore wind turbines
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Abstract
A disassembly-free offshore cast-in-place concrete bearing platform foundation comprises a prefabricated vertical ring, a prefabricated bottom plate, a steel pipe pile and a steel foundation ring; the prefabricated bottom plate is supported at the upper end of the steel pipe pile; the prefabricated vertical ring is arranged on the upper surface of the prefabricated bottom plate, and the steel foundation ring is arranged in the middle of the prefabricated bottom plate; a post-pouring interval is formed among the steel foundation ring, the prefabricated vertical ring and the prefabricated bottom plate, and post-pouring reinforced concrete is poured in the post-pouring interval; the prefabricated vertical ring, the prefabricated bottom plate, the steel pipe pile and the steel foundation ring are cast into a whole by post-cast reinforced concrete; the disassembly-free formwork has the advantages that reinforced concrete is cast in situ in the foundation, durability protection measures are obviously reduced, the bearing platform is high in durability, the influence of complex sea conditions and climate on construction operation can be reduced, the construction safety is improved, the construction difficulty is small, the efficiency is high, and the comprehensive economic benefit of the bearing platform is high.
Description
Technical Field
The invention relates to a marine fixed wind power high pile foundation, in particular to a disassembly-free marine cast-in-place concrete bearing platform foundation.
Background
The existing offshore fixed high pile foundation bearing platform is designed in a form of cast-in-place reinforced concrete bearing platform foundation equipment constructed by an integral steel box template. The construction method is that the equipment is hoisted and assembled on the sea to form an integral steel box template as a construction platform and a template system, cast-in-place reinforced concrete construction operation is carried out on the platform, and finally the steel box template system is dismantled. The construction template of the cast-in-place reinforced concrete high-pile foundation bearing platform generally adopts an integral steel box template. The typical current integral steel box formwork structure consists of 6 main parts, namely a side wall formwork, a bottom plate, a bottom truss, an upper truss and a hanging rod. The side wall of the steel box template is formed by splicing a plurality of single sheets, and the single sheets of the side wall are connected by bolts; the truss girder bracket is connected with the side wall bolt; an upper cantilever beam and a lower cantilever beam are arranged in the upper truss and are connected through an inclined rod and a vertical support by a hinge bolt; the hanger rods serve as structural vertical connections to connect the upper truss to the bottom truss. The side wall of the template and the joint of the bottom plate are sealed by the customized rubber strips, so that the structure is ensured to be watertight.
The steel box template is manufactured on land and integrally transferred to a field for installation. When the steel box template is installed, the side line of a main beam of the steel beam of the template is used as control, an installation positioning mark is released on the pile top, a guide plate is welded on the pile top, so that the steel box template can be conveniently positioned along the guide plate, and a method of installing, measuring and adjusting the steel box template at the same time and gradually welding the guide plate and a limiting plate is adopted. After the installation is accomplished, utilize limiting plate welded connection to become a whole with steel pouring jacket case and pile bolck to avoid steel-pipe pile to produce in the work progress and rock, influence construction quality.
And then, performing reinforced concrete projects such as connection steel projects of piles and foundation rings, binding of reinforcing steel bars, pouring and maintenance of concrete and the like on a construction platform formed by the integral steel box template.
The existing foundation has the following problems:
(1) The offshore fixed wind power high pile foundation full cast-in-place bearing platform has long construction period and low work efficiency;
the construction of the foundation of the offshore wind power fixed high-rise pile cap is influenced by seasons and climate, and the construction window period is limited. The traditional full cast-in-place reinforced concrete bearing platform firstly needs to cast a bearing platform bottom plate on site, the thickness of the bottom plate is generally 600-800mm, the construction of the bearing platform bottom plate has the circulating processes of formwork support and formwork removal, and necessary supports need to be erected in a matched mode on site. And then, template engineering and steel bar engineering are carried out on the bearing platform bottom plate, and the working procedures are carried out stage by stage, so that the working procedures are multiple and complicated, and the construction period of the full cast-in-place foundation bearing platform is long and the construction efficiency is low.
(2) The steel box template has high cost and poor durability;
the fixed wind power high pile foundation full cast-in-place reinforced concrete bearing platform consumes a large amount of steel box templates, and the template cost is high. Offshore steel is rusted by seawater, and the later-stage maintenance of the template is needed, so that the turnover, amortization and accounting cost of the template is influenced. If the steel formwork is a permanent formwork which is not dismantled, the investment cost for one-time construction of the bearing platform is higher.
(3) The durability of reinforced concrete materials;
because the fixed wind power high pile foundation full cast-in-place reinforced concrete bearing platform adopts common high-performance reinforced concrete materials, although concrete adopts durability measures, extra durability protection measures are often necessary to the concrete due to the severe offshore service environment. The additional durability protection measures entail additional measure expenditure costs. In addition, because of the inadequate durability measures, in particularly severe areas of corrosion, such as tidal areas and splash areas, the structure of the platform may be damaged and worn earlier due to water flow scouring and dry-wet cycles, affecting the overall life of the platform equipment, and in recent years, more and more cases of gradual aging failure of ocean engineering built earlier have been discovered.
Disclosure of Invention
Aiming at the defects, the invention provides the disassembly-free offshore cast-in-place concrete bearing platform foundation.
The invention solves the technical problem by adopting the scheme that the disassembly-free offshore cast-in-place concrete bearing platform foundation comprises a prefabricated vertical ring, a prefabricated bottom plate, a steel pipe pile and a steel foundation ring;
the prefabricated bottom plate is supported at the upper end of the steel pipe pile;
the prefabricated vertical ring is arranged on the upper surface of the prefabricated bottom plate, and the steel foundation ring is arranged in the middle of the prefabricated bottom plate;
post-pouring intervals are formed among the steel foundation rings, the prefabricated vertical rings and the prefabricated bottom plates, and post-pouring reinforced concrete is poured in the post-pouring intervals;
the prefabricated vertical ring, the prefabricated bottom plate, the steel pipe pile and the steel foundation ring are cast into a whole by post-cast reinforced concrete.
Furthermore, the prefabricated vertical ring and the prefabricated bottom plate are prefabricated by adopting UHPC.
Furthermore, the prefabricated vertical ring, the prefabricated bottom plate and the steel foundation ring are coaxially arranged.
Further, the steel structure roof beam is installed to the steel-pipe pile upper end, and the steel structure roof beam is located the post-cast interval and is connected with the steel foundation ring.
Furthermore, the cross section of the prefabricated vertical ring is L-shaped, the inner side surface of the vertical part of the prefabricated vertical ring is wide at the bottom and narrow at the top, and the lower surface of the horizontal part of the prefabricated vertical ring is provided with a ring groove.
Furthermore, the periphery circumference above the prefabricated bottom plate is provided with a ring bulge spliced with the ring groove, and the prefabricated UHPC bottom plate is provided with a reserved hole for the upper end of the steel pipe pile to extend into.
Furthermore, steel support brackets are installed on the periphery of the upper portion of the steel pipe pile, supporting surfaces used for supporting the prefabricated bottom plate are formed on the upper end faces of the steel support brackets, and the lower ends of the reserved holes are sealed through the supporting surfaces.
Furthermore, embedded bolts A used for connecting the prefabricated vertical ring and embedded bolts B used for connecting the steel foundation ring are embedded in the periphery and the middle of the prefabricated bottom plate respectively.
Furthermore, the upper surface of the horizontal part is provided with a connecting steel plate for connecting the embedded bolts A, and the lower end of the steel foundation ring is provided with an ear steel plate for connecting the embedded bolts B.
Furthermore, the connecting steel plates are arranged in an annular shape or are uniformly distributed on the circumference.
Furthermore, a plurality of connecting steel bars are pre-embedded in the upper surface of the prefabricated bottom plate and the inner surface of the prefabricated vertical ring.
Compared with the prior art, the invention has the following beneficial effects: the template is not dismantled, reinforced concrete is cast in situ in the interior, the fast construction that is applicable to fixed offshore wind power high pile foundation cushion cap equipment, the durability safeguard measure is showing and is reducing, cushion cap durability is high, can alleviate the influence of complicated sea state and weather to the construction operation, improves the construction safety, and the construction cycle is short, and the construction degree of difficulty is little, and the efficiency of construction is high, and cushion cap comprehensive economic benefits is high.
Drawings
The invention is further described with reference to the following figures.
FIG. 1 is a schematic view of the basic structure of the present bearing platform.
Fig. 2 is a schematic structural view of the cast-in-place reinforced concrete.
Fig. 3 is a schematic view of the internal structure of the cast-in-place reinforced concrete.
Fig. 4 is a top view of the structure of the un-poured post-cast reinforced concrete.
Fig. 5 shows a schematic structure of a prefabricated UHPC floor.
Fig. 6 is a schematic view of the installation structure of the steel support bracket.
Fig. 7 is a schematic structural view of the connection steel plate.
In the figure: 1-post-pouring reinforced concrete; 1 a-a steel structural beam; 2-prefabricating a UHPC vertical ring; 2 a-a vertical portion; 2 b-a horizontal portion; 2 c-a ring groove; 3-prefabricating a UHPC base plate; 3 a-reserving a hole; 3 b-ring convex; 4-steel pipe pile; 5-steel support bracket; 6-a steel foundation ring; 7-vertical ring U-shaped ribs; 8-bottom plate U-shaped ribs; 9-embedding a bolt A; 10-connecting steel plates; 11-embedding a bolt B; 12-support surface.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in fig. 1-7, a disassembly-free offshore cast-in-place concrete cap foundation comprises a prefabricated UHPC vertical ring 2, a prefabricated UHPC bottom plate 3, a steel pipe pile 4 and a steel foundation ring 6;
the prefabricated UHPC bottom plate is supported at the upper end of the steel pipe pile;
the prefabricated UHPC vertical ring is arranged on the upper surface of the prefabricated UHPC bottom plate, and the steel foundation ring is arranged in the middle of the prefabricated UHPC bottom plate;
a post-pouring interval is formed among the steel foundation ring, the prefabricated UHPC vertical ring and the prefabricated UHPC bottom plate, and post-pouring reinforced concrete 1 is poured in the post-pouring interval;
prefabricating a UHPC vertical ring, prefabricating a UHPC bottom plate, a steel pipe pile and a steel foundation ring, and casting post-cast reinforced concrete into a whole;
the bearing platform foundation is prefabricated by a UHPC vertical ring and a prefabricated UHPC bottom plate, can be prefabricated and formed in advance, can be additionally provided with part of steel bar engineering, does not have bottom plate template engineering, bottom plate steel bar engineering or bottom plate concrete pouring and maintenance engineering on site, and only has installation engineering on the bottom plate; the vertical ring is prefabricated and formed on land and is used as a permanent dismantling-free template of a bearing platform core concrete project, and the template dismantling project is not needed on site.
In this embodiment, the prefabricated UHPC vertical ring, the prefabricated UHPC bottom plate and the steel foundation ring are coaxially arranged.
In this embodiment, steel structure roof beam 1a is installed to the steel-pipe pile upper end, and the steel structure roof beam is located the post-cast section and is connected with steel foundation ring.
In this embodiment, the prefabricated UHPC vertical ring has an L-shaped cross section, the vertical part 2a of the prefabricated UHPC vertical ring is wide at the bottom and narrow at the top, and the horizontal part 2b of the prefabricated UHPC vertical ring is provided with a ring groove 2c at the lower surface.
In this embodiment, the circumference of the periphery above the prefabricated UHPC bottom plate is provided with a ring protrusion 3b for splicing with the ring groove to form a splicing seam connection and waterproof structure, the prefabricated UHPC bottom plate is provided with a reserved hole 3a for the upper end of the steel pipe pile to extend into, and the diameter of the section of the reserved hole is larger than the diameter of the steel pipe pile by 400-450mm, so that the steel pipe pile can extend into and be connected with the foundation ring conveniently.
In this embodiment, the steel support bracket 5 is installed on the periphery of the upper portion of the steel pipe pile, the steel support bracket is welded with the pile body of the steel pipe pile in advance to form a steel support platform, a support surface 12 used for supporting the prefabricated UHPC bottom plate is formed on the upper end surface of the steel support bracket, and the lower end of the reserved hole is sealed by the support surface.
In this embodiment, an embedded bolt A9 for connecting a prefabricated UHPC vertical ring and an embedded bolt B11 for connecting a steel foundation ring are embedded in the periphery and the middle of the prefabricated UHPC bottom plate respectively.
In this embodiment, horizontal part upper surface is provided with connecting steel plate 10 for connecting buried bolt A in advance, and connecting steel plate makes buried bolt A connect even atress, reduces stress concentration, and steel foundation ring lower extreme is provided with the ear that is used for connecting buried bolt B in advance.
In this embodiment, the connection steel plate is a plurality of ring-shaped or circumferentially and evenly distributed.
In this embodiment, a plurality of connecting steel bars are pre-embedded in the upper surface of the prefabricated UHPC bottom plate and the inner surface of the prefabricated UHPC vertical ring, and the connecting steel bars have a connecting effect and a shearing resistance effect; the connecting steel bars comprise a bottom plate U-shaped rib 8 pre-buried on the upper surface of the prefabricated UHPC bottom plate and a vertical ring U-shaped rib 7 pre-buried on the inner surface of the vertical ring of the UHPC.
The bearing platform foundation is a part of the bearing platform by the aid of a permanent template consisting of the prefabricated UHPC vertical ring and the prefabricated UHPC bottom plate without being dismantled, engineering quantity of cast-in-place reinforced concrete in the bearing platform is reduced, and offshore construction time is shortened; the prefabricated permanent formwork made of UHPC materials forms a stable box sleeving structure after being assembled, construction safety of constructors in the permanent formwork is high, the influence of complex sea conditions and weather on construction operation can be reduced, construction efficiency is improved, and construction difficulty is reduced;
the prefabricated UHPC vertical ring and the prefabricated UHPC bottom plate adopted by the bearing platform foundation are both made of ultra-high-performance concrete, the ultra-high-performance concrete has the characteristic of ultra-high strength (120-200 MPa), the UHPC permanent disassembly-free template is used as an offshore wind power bearing platform shell, and the ultra-high-performance concrete bottom plate and the vertical ring are used as a part of a bearing platform structure, so that the engineering quantity of internally cast-in-place reinforced concrete is reduced; if compared with the method of avoiding the steel box, the comprehensive economic benefit advantage can be further highlighted to a certain extent; the concrete protection method can reduce or avoid the extra measure requirements of the tidal zone and the splash zone on the concrete protection project, remarkably reduce the operation and maintenance measure requirements of the durability of the bearing platform, and provide important guarantee for greatly improving the durability of concrete structures of the tidal zone and the splash zone and prolonging the service life of bearing platform equipment.
The bearing platform foundation can realize the industrial design, production and assembly construction of the ultra-high performance concrete free formwork, fully exerts the assembly construction efficacy of the combined concrete engineering, is beneficial to the industrial development of the fixed offshore wind power project, and can improve the comprehensive economic benefit of the bearing platform due to the advantages.
If this patent discloses or refers to parts or structures that are fixedly connected to each other, the fixedly connected parts are understood to be, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding) can, of course, also be replaced by one-piece structures (e.g. manufactured in one piece using a casting process) (unless it is obvious that one-piece processes cannot be used).
In the description of this patent, it is to be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the patent, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
The above-mentioned preferred embodiments, object, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned preferred embodiments are only illustrative of the present invention, and should not be construed as limiting the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides an exempt from to tear open marine cast in situ concrete cushion cap basis which characterized in that: the prefabricated steel pipe pile foundation comprises prefabricated vertical rings, prefabricated bottom plates, steel pipe piles and steel foundation rings;
the prefabricated bottom plate is supported at the upper end of the steel pipe pile;
the prefabricated vertical ring is arranged on the upper surface of the prefabricated bottom plate, and the steel foundation ring is arranged in the middle of the prefabricated bottom plate;
a post-pouring interval is formed among the steel foundation ring, the prefabricated vertical ring and the prefabricated bottom plate, and post-pouring reinforced concrete is poured in the post-pouring interval;
the prefabricated vertical ring, the prefabricated bottom plate, the steel pipe pile and the steel foundation ring are cast into a whole by post-cast reinforced concrete.
2. The disassembly-free offshore cast in place concrete cap foundation of claim 1, characterized in that: and the prefabricated vertical ring and the prefabricated bottom plate are prefabricated by adopting UHPC.
3. The disassembly-free offshore cast-in-place concrete cap foundation of claim 1, characterized in that: the prefabricated vertical ring, the prefabricated bottom plate and the steel foundation ring are coaxially arranged.
4. The disassembly-free offshore cast in place concrete cap foundation of claim 1, characterized in that: the steel structure roof beam is installed to the steel-pipe pile upper end, and the steel structure roof beam is located the post-cast interval and is connected with steel foundation ring.
5. The disassembly-free offshore cast in place concrete cap foundation of claim 1, characterized in that: the cross section of the prefabricated vertical ring is L-shaped, and the lower surface of the horizontal part of the prefabricated vertical ring is provided with a ring groove.
6. The disassembly-free offshore cast in place concrete cap foundation of claim 5, wherein: the prefabricated bottom plate top periphery circumference is provided with the ring protruding for with the annular concatenation, set up the reservation entrance to a cave that supplies steel-pipe pile upper end to stretch into on the prefabricated bottom plate.
7. The disassembly-free offshore cast in place concrete cap foundation of claim 6, characterized in that: and a steel support bracket is arranged on the periphery of the upper part of the steel pipe pile, a support surface for supporting the prefabricated UHPC bottom plate is formed on the upper end surface of the steel support bracket, and the lower end of the reserved hole is sealed by the support surface.
8. The disassembly-free offshore cast-in-place concrete cap foundation of any one of claims 1 to 7, wherein: and a plurality of connecting steel bars are pre-embedded in the upper surface of the prefabricated bottom plate and the inner surface of the prefabricated vertical ring.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221187655.0U CN217580255U (en) | 2022-05-18 | 2022-05-18 | Disassembly-free offshore cast-in-place concrete bearing platform foundation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221187655.0U CN217580255U (en) | 2022-05-18 | 2022-05-18 | Disassembly-free offshore cast-in-place concrete bearing platform foundation |
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| CN217580255U true CN217580255U (en) | 2022-10-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114809062A (en) * | 2022-05-18 | 2022-07-29 | 中广核(福建)风力发电有限公司 | Integral bottom plate-integral vertical ring combined concrete bearing platform foundation and construction process thereof |
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2022
- 2022-05-18 CN CN202221187655.0U patent/CN217580255U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114809062A (en) * | 2022-05-18 | 2022-07-29 | 中广核(福建)风力发电有限公司 | Integral bottom plate-integral vertical ring combined concrete bearing platform foundation and construction process thereof |
| CN114809062B (en) * | 2022-05-18 | 2024-05-03 | 中广核(福建)风力发电有限公司 | Integral bottom plate-integral vertical ring combined concrete bearing platform foundation and construction process thereof |
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