CN110004920B - Combined offshore foundation and construction method thereof - Google Patents
Combined offshore foundation and construction method thereof Download PDFInfo
- Publication number
- CN110004920B CN110004920B CN201910380163.XA CN201910380163A CN110004920B CN 110004920 B CN110004920 B CN 110004920B CN 201910380163 A CN201910380163 A CN 201910380163A CN 110004920 B CN110004920 B CN 110004920B
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- main pile
- vertical
- rib
- pile column
- root key
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- 238000010276 construction Methods 0.000 title abstract description 11
- 238000004873 anchoring Methods 0.000 claims description 17
- 238000003825 pressing Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000013011 mating Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D13/00—Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
- E02D13/04—Guide devices; Guide frames
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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
- E02D27/12—Pile foundations
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/28—Prefabricated piles made of steel or other metals
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/48—Piles varying in construction along their length, i.e. along the body between head and shoe, e.g. made of different materials along their length
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (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)
- Foundations (AREA)
Abstract
The invention discloses a combined offshore foundation and a construction method thereof, which are characterized in that a support is used for sinking and guiding main piles, and four main piles at four corners are transversely connected at the upper half sections by utilizing the frame type support to form an integral foundation structure with rigidity meeting the requirement; the main pile column is provided with a root key at the lower section, and the root key is utilized to obtain the bearing capacity and the pulling resistance of the foundation structure meeting the requirements. The main pile is used as a main stress component in the foundation structure, so that the bearing capacity of the structure can be ensured; the split components are light in structure, large-tonnage floating crane equipment and piling equipment are not needed, so that the construction is simple, and the manufacturing cost is saved.
Description
Technical Field
The invention relates to the engineering fields of constructional engineering, bridge engineering, ocean wind power engineering and the like, in particular to an offshore foundation applied to ocean engineering and a construction method thereof.
Background
Along with the increase of bridge superstructure load and the improvement of bearing capacity and anti-pulling performance requirements of ocean wind power foundation, traditional foundation structures need longer pile length and larger pile diameter, and transportation and installation of the foundation structures all need higher-requirement construction equipment and require compact operation construction period. However, in order to meet the requirements, a high cost is required for the severe working environment in the ocean engineering.
Disclosure of Invention
The invention provides a combined offshore foundation and a construction method thereof to solve the problem of longer traditional pile foundations and increase the bearing capacity and the pulling resistance of a foundation structure.
The invention adopts the following technical scheme for solving the technical problems:
the combined offshore foundation has the structural characteristics that: the main pile columns are sunk and guided by the brackets, and four main pile columns at four corners are transversely connected at the upper half sections by utilizing the frame-type brackets, so that an integral foundation structure with rigidity meeting the requirement is formed; and the lower section of the main pile column is provided with a root key, and the root key is utilized to obtain the bearing capacity and the pulling resistance of the foundation structure meeting the requirements.
The combined offshore foundation of the invention is also characterized in that:
the support is provided with an upper parallel connection layer and a lower parallel connection layer, a rectangular frame is formed by connecting short piles and inclined struts between the upper parallel connection layer and the lower parallel connection layer, guide rings are respectively arranged at the corners of the rectangular frame at the four corner positions, and anchor rings are respectively arranged at the corners of the lower parallel connection layer;
the main pile column obtains sinking guide in the guide ring by utilizing a vertical guide rib arranged between the main pile column and the guide ring; the main pile column is vertically anchored in the anchoring ring by using a socket joint type falcon rib arranged between the main pile column and the anchoring ring;
the vertical guide rib means: the method comprises the steps that a vertical locking rib plate is arranged on the outer side wall of a main pile column, a vertical guide rib plate is arranged on the inner side wall of a guide ring, a sinking main pile column obtains vertical guide between the adjacent vertical locking rib plate and the vertical guide rib plate, and after sinking of the main pile column is completed, a bolt is utilized to lock between the adjacent vertical locking rib plate and the vertical guide rib plate;
the socket joint formula tenon rib means: the vertical tenon plates are arranged on the main pile along the axial direction of the main pile, vertical tenon grooves are correspondingly formed in the inner side walls of the anchoring rings, and the sunken main pile is anchored by utilizing a mortise-tenon engagement structure of the socket-type tenon ribs.
The combined offshore foundation of the invention is also characterized in that: and comb teeth ribs are arranged on the outer side wall of the main pile column and correspond to the positions of the root keys, and the root keys are guided and anchored on the outer side wall of the main pile column by the comb teeth ribs.
The combined offshore foundation of the invention is also characterized in that: the comb teeth rib means:
a group of strip-shaped rib plates are arranged on the outer side wall of the main pile column in parallel along the axial direction of the main pile column corresponding to the positions of the key holes; the strip rib plate is broken into an upper section rib and a lower section rib at the hole position where the root key hole is located, the upper section rib and the lower section rib extend towards the inside of the root key hole along the axial direction of the main pile column, and an upper group of vertical comb teeth and a lower group of vertical comb teeth are formed at the edge of the root key hole;
the root of the root key is provided with a table body, the periphery of the table body is provided with tooth grooves, the tooth grooves are in concave-convex fit with the upper and lower groups of vertical comb teeth formed by the strip-shaped rib plates, so that the table body obtains the guiding of the vertical comb teeth in the pushing direction along the root key and obtains the limit in the axial direction along the main pile.
The combined offshore foundation of the invention is also characterized in that: the tooth top surface of the vertical comb teeth and the groove bottom surface of the tooth groove at the periphery of the table body are set to be inclined planes with the same gradient, so that the table body forms wedge surface matching between the upper group of vertical comb teeth and the lower group of vertical comb teeth to realize anchoring.
The combined offshore foundation of the invention is also characterized in that: the root keys are a group of two parallel root keys, the two root keys are connected into a whole by the same table body, a vertical through groove is arranged between the two root keys on the table body, and a vertical through long rib fixedly welded on the corresponding position of the outer side wall of the main pile column is matched with the through groove.
The construction method of the combined offshore foundation is characterized by comprising the following steps:
step 1, hanging a bracket by adopting an offshore floating crane, and sinking the bracket to the position through a pre-pressing weight: the lower parallel layer and the anchor ring of the bracket are positioned on the sea bed surface, and the upper parallel layer and the guide ring of the bracket are positioned in water;
step 2, starting a piling ship to respectively apply each main pile column to: the main pile column and the anchoring hole are anchored by mortise and tenon engagement of the socket joint type tenon rib; locking is realized between the main pile and the guide ring by locking the vertical guide rib through bolts;
and 3, hanging a root key jacking device into the main pile by taking an upper parallel layer in the support as an operation platform to find Kong Dingjin the root key, wherein the root key realizes root key locking by using comb rib on the main pile.
Compared with the prior art, the invention has the beneficial effects that:
1. the stress of each part in the invention is clear. The support is a main pile column sinking guide, so that the integral rigidity of the structure is ensured, and the main pile column is taken as a main stress member in the basic structure, so that the bearing capacity of the structure can be ensured;
2. the setting of the root key as the basic structure greatly enhances the bearing capacity and enhances the pulling resistance of the basic structure;
3. the invention effectively shortens the pile length and saves the material cost;
4. in the invention, the main pile, the bracket and the root key are independently manufactured and assembled; the split type pile driver has the advantages that the structure of each part is light, large-tonnage floating crane equipment and pile driving equipment are not needed, so that the construction operation is simple, and the manufacturing cost is greatly saved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of a bracket structure according to the present invention;
FIG. 3 is a schematic diagram of the mating structure of the main pile and the guide ring according to the present invention;
FIG. 4 is a schematic view of the guide ring structure of the present invention;
FIG. 5 is a schematic view of a portion of a vertical guide rib provided on the outer sidewall of a main pile according to the present invention;
FIG. 6 is a schematic view of the mating structure of the main pile and the anchor ring according to the present invention;
FIG. 7 is a schematic view of an anchoring ring according to the present invention;
FIG. 8 is a schematic view of a vertical tongue plate structure of the present invention disposed on the outer sidewall of a main pile;
FIG. 9 is a schematic diagram of the connection between the main pile and the root key according to the present invention;
FIG. 10 is a schematic view of a root keyhole and a bar rib provided on the outer sidewall of a primary pile according to the present invention;
FIG. 11 is a schematic diagram of a root key structure according to the present invention;
reference numerals in the drawings: the pile comprises a main pile, 1a key holes, 2 supports, 2a upper parallel connection layers, 2b lower parallel connection layers, 2c short piles, 2d inclined struts, 3 guide rings, 3a vertical locking rib plates, 3b vertical guide rib plates, 4 anchor rings, 4a vertical tenon plates, 4b vertical tenon grooves, 5 keys, 5a table bodies, 5b tooth grooves, 5c vertical through grooves, 6 strip rib plates, 6a upper section ribs, 6b lower section ribs and 7 vertical through long ribs.
Detailed Description
Referring to fig. 1, in the combined offshore foundation in this embodiment, a support 2 is used to sink and guide a main pile 1, and four main piles 1 at four corners are transversely connected at the upper half section by using a frame-type support 2, so as to form an integral foundation structure with rigidity meeting requirements; as shown in fig. 1 and 9, the main pile 1 is provided with a root key 5 at the lower section, and the root key 5 is used to obtain the bearing capacity and the pulling resistance of the foundation structure meeting the requirements.
In specific implementation, the corresponding technical measures also comprise:
as shown in fig. 1 and 2, the bracket 2 has an upper flat-joint layer 2a and a lower flat-joint layer 2b, and a rectangular frame is formed by connecting short piles 2c and diagonal braces 2d between the upper flat-joint layer 2a and the lower flat-joint layer 2b, guide rings 3 are respectively provided at each corner of the upper flat-joint layer 2a and anchor rings 4 are respectively provided at each corner of the lower flat-joint layer 2b at four corner positions of the rectangular frame.
In this embodiment, as shown in fig. 1, the main pile 1 is sunk in the guide ring 3 by means of vertical guide ribs provided between the main pile 1 and the guide ring 3; the main pile 1 is anchored vertically in the anchor ring 4 by means of socket joint type tenon ribs arranged between the main pile 1 and the anchor ring 4, and the vertical guide ribs, the socket joint type tenon ribs and the root keys are distributed uniformly on the outer circumference of the main pile.
As shown in fig. 3, 4 and 5, the vertical guide rib means: the vertical locking rib plate 3a which is fixedly welded and protruded on the radial direction of the main pile column is arranged on the outer side wall of the main pile column 1, the vertical guiding rib plate 3b which is fixedly welded and protruded on the radial direction of the guiding ring is also arranged on the inner side wall of the guiding ring 3 by utilizing the triangular supporting plate, the sunken main pile column 1 obtains vertical guiding between the adjacent vertical locking rib plate 3a and the vertical guiding rib plate 3b, and after the main pile column is sunken, the locking is carried out between the adjacent vertical locking rib plate 3a and the vertical guiding rib plate 3b by utilizing bolts.
As shown in fig. 6, 7 and 8, the socket tenon rib means: vertical tenon plates 4a are arranged on the main pile 1 along the axial direction of the main pile 1, vertical tenon grooves 4b are correspondingly arranged on the inner side walls of the anchoring rings 4, and the sunken main pile 1 realizes anchoring by utilizing a mortise and tenon engagement structure of socket-type tenon ribs.
As shown in fig. 9, 10 and 11, in this embodiment, on the outer side wall of the main pile 1, comb teeth ribs are provided corresponding to the positions of the root keys 5, and the root keys 5 are guided and anchored on the outer side wall of the main pile 1 by the comb teeth ribs.
The comb teeth rib means: a group of strip-shaped rib plates 6 are arranged on the outer side wall of the main pile column 1 in parallel along the axis direction of the main pile column 1 corresponding to the position of the root key holes 1 a; the strip rib plate 6 is broken into an upper section rib 6a and a lower section rib 6b at the hole position where the root key hole 1a is positioned, the upper section rib 6a and the lower section rib 6b extend towards the inside of the root key hole 1a along the axial direction of the main pile column 1, and an upper group of vertical comb teeth and a lower group of vertical comb teeth are formed at the edge of the root key hole; a table body 5a is arranged at the root of the root key 5, a tooth groove 5b is arranged at the periphery of the table body 5a, and the tooth groove is matched with the upper and lower groups of vertical comb teeth formed by the strip rib plates in a concave-convex manner, so that the table body 5a obtains the guiding of the vertical comb teeth in the pushing direction along the root key 5 and obtains the limit in the axial direction along the main pile column 1.
The tooth top surface of the vertical comb teeth and the groove bottom surface of the tooth groove at the periphery of the platform body are set to be inclined planes with the same gradient, so that an inclined plane groove is formed, and the platform body 5a forms wedge surface matching between the upper group of vertical comb teeth and the lower group of vertical comb teeth to realize anchoring.
In order to firmly structure and reduce stress concentration at the hole part on the main pile, the root key 5 is formed by taking two parallel root keys as a group, the two root keys are connected into a whole by using the same table body, a vertical through groove 5c is arranged between the two root keys on the table body 5a, and a vertical through long rib 7 fixedly welded on the corresponding position of the outer side wall of the main pile 1 is matched with the vertical through groove 5 c.
In specific implementation, the strip rib plates 6 and the vertical through long ribs 7 are fixedly welded on the outer side wall of the main pile column 1 and are integrally manufactured with the main pile column 1, a root key hole 1a is formed in the jacking position of the main pile column 1 corresponding to a root key, a root table body 5a of the root key is a variable cross-section table body, the front end is small, the rear end is large, the outer diameter size of the root key hole 1a is larger than the front end surface size of the table body 5a and smaller than the rear end surface size of the table body, so that the root table body of the root key 5 can penetrate into the root key hole and be anchored in the root key hole. In order to facilitate finding Kong Dingjin of the root key, the end part of the outer cantilever arm of the root key is made into a round falcon, so that the outer diameter of the outer cantilever arm end of the root key is smaller than the outer diameter of the root part of the root key.
The construction method of the combined offshore foundation in the embodiment is carried out according to the following steps:
step 1, hanging a bracket by adopting an offshore floating crane, and sinking the bracket to the position through a pre-pressing weight: the lower parallel layer and the anchor ring of the bracket are positioned on the sea bed surface, and the upper parallel layer and the guide ring of the bracket are positioned in water;
step 2, starting a piling ship to respectively apply each main pile column to: the main pile column and the anchoring hole are anchored by mortise and tenon engagement of the socket joint type tenon rib; locking is realized between the main pile and the guide ring by locking the vertical guide rib through bolts;
and 3, hanging a root key jacking device into the main pile by taking an upper parallel layer in the support as an operation platform to find Kong Dingjin the root key, wherein the root key realizes root key locking by using comb rib on the main pile.
And 4, after jacking of all the root keys is completed, throwing and pouring fine sand and stone into the main pile until the fine sand and stone cover the uppermost layer of root key holes, so that the root keys have more firm anchoring performance.
Claims (4)
1. The combined offshore foundation is characterized in that: the support (2) is used for sinking and guiding the main pile columns (1), and the four main pile columns (1) at four corners are transversely connected at the upper half sections by utilizing the frame-type support (2) to form an integral foundation structure with rigidity meeting the requirement; a root key (5) is arranged at the lower section of the main pile column (1), and the root key (5) is utilized to obtain the bearing capacity and the pulling resistance of the foundation structure meeting the requirements;
the support (2) is provided with an upper parallel layer (2 a) and a lower parallel layer (2 b), a rectangular frame is formed by connecting a short pile column (2 c) and a diagonal brace (2 d) between the upper parallel layer (2 a) and the lower parallel layer (2 b), guide rings (3) are respectively arranged at each corner of the upper parallel layer (2 a) at four corner positions of the rectangular frame, and anchor rings (4) are respectively arranged at each corner of the lower parallel layer (2 b);
the main pile column (1) is in a guide ring (3) and is subjected to sinking guide by using a vertical guide rib arranged between the main pile column (1) and the guide ring (3); the main pile column (1) is vertically anchored in the anchoring ring (4) by utilizing a socket tenon rib arranged between the main pile column (1) and the anchoring ring (4);
the vertical guide rib means: a vertical locking rib plate (3 a) is arranged on the outer side wall of the main pile column (1), a vertical guide rib plate (3 b) is arranged on the inner side wall of the guide ring (3), the sinking main pile column (1) obtains vertical guide between the adjacent vertical locking rib plate (3 a) and the vertical guide rib plate (3 b), and after the sinking of the main pile column is completed, the bolts are utilized to lock between the adjacent vertical locking rib plate (3 a) and the vertical guide rib plate (3 b);
the socket joint formula tenon rib means: a vertical tenon plate (4 a) is arranged on the main pile column (1) along the axial direction of the main pile column (1), a vertical tenon groove (4 b) is correspondingly arranged on the inner side wall of the anchoring ring (4), and the sunken main pile column (1) realizes anchoring by utilizing a mortise and tenon engagement structure of the socket tenon rib;
comb teeth ribs are arranged on the outer side wall of the main pile column (1) corresponding to the positions of the root keys (5), and the root keys (5) are guided and anchored on the outer side wall of the main pile column (1) by the comb teeth ribs;
the comb teeth rib means:
a group of strip-shaped rib plates (6) are arranged on the outer side wall of the main pile column (1) in parallel along the axis direction of the main pile column (1) corresponding to the position of the root key hole (1 a); the strip-shaped rib plate (6) is broken into an upper section rib (6 a) and a lower section rib (6 b) at the position of a hole where the root key hole (1 a) is located, the upper section rib (6 a) and the lower section rib (6 b) protrude inwards towards the root key hole (1 a) along the axial direction of the main pile column (1), and an upper group of vertical comb teeth and a lower group of vertical comb teeth are formed at the edge of the root key hole (1 a);
the root of the root key (5) is provided with a table body (5 a), the periphery of the table body (5 a) is provided with a tooth groove (5 b), the tooth groove (5 b) is in concave-convex fit with an upper vertical comb teeth and a lower vertical comb teeth formed by the strip-shaped rib plates (6), so that the table body (5 a) obtains the guiding of the vertical comb teeth in the pushing direction along the root key (5), and obtains the limit in the axial direction along the main pile column (1).
2. The modular offshore foundation of claim 1, wherein: the tooth top surface of the vertical comb teeth and the groove bottom surface of the tooth groove (5 b) at the periphery of the table body are set to be inclined planes with the same gradient, so that the table body (5 a) forms wedge surface matching between the upper group of vertical comb teeth and the lower group of vertical comb teeth to realize anchoring.
3. The modular offshore foundation of claim 1, wherein: the root keys (5) are formed by taking two parallel root keys as a group, the two root keys are connected into a whole by using the same platform body (5 a), a vertical through groove (5 c) is arranged between the two root keys on the platform body (5 a), and a vertical through long rib (7) fixedly welded on the corresponding position of the outer side wall of the main pile column (1) is matched with the vertical through groove (5 c).
4. The method for constructing a combined offshore foundation according to claim 1, which is characterized by comprising the following steps:
step 1, hanging a bracket by adopting an offshore floating crane, and sinking the bracket to the position through a pre-pressing weight: the lower parallel layer and the anchor ring of the bracket are positioned on the sea bed surface, and the upper parallel layer and the guide ring of the bracket are positioned in water;
step 2, starting a piling ship to respectively apply each main pile column to: the main pile column and the anchoring hole are anchored by mortise and tenon engagement of the socket joint type tenon rib; locking is realized between the main pile and the guide ring by locking the vertical guide rib through bolts;
and 3, hanging a root key jacking device into the main pile by taking an upper parallel layer in the support as an operation platform to find Kong Dingjin the root key, wherein the root key realizes root key locking by using comb rib on the main pile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910380163.XA CN110004920B (en) | 2019-05-08 | 2019-05-08 | Combined offshore foundation and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910380163.XA CN110004920B (en) | 2019-05-08 | 2019-05-08 | Combined offshore foundation and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110004920A CN110004920A (en) | 2019-07-12 |
| CN110004920B true CN110004920B (en) | 2024-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910380163.XA Active CN110004920B (en) | 2019-05-08 | 2019-05-08 | Combined offshore foundation and construction method thereof |
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| CN (1) | CN110004920B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111827342B (en) * | 2020-07-24 | 2022-02-11 | 中国华西企业股份有限公司 | High-altitude installation method for supporting legs of electromagnetic particle detector |
| CN114165036A (en) * | 2021-11-05 | 2022-03-11 | 顺德职业技术学院 | Wall-attached climbing equipment for high-rise building construction |
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| CN210002390U (en) * | 2019-05-08 | 2020-01-31 | 安徽省交通规划设计研究总院股份有限公司 | Combined type offshore foundation |
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- 2019-05-08 CN CN201910380163.XA patent/CN110004920B/en active Active
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|---|---|---|---|---|
| KR20160006273A (en) * | 2014-07-07 | 2016-01-19 | 현대중공업 주식회사 | Apparatus for Supporting Marine Structure |
| CN205276260U (en) * | 2016-01-03 | 2016-06-01 | 中国长江三峡集团公司 | Novel marine wind power anti -floating pile |
| CN106759300A (en) * | 2016-11-25 | 2017-05-31 | 淮阴工学院 | Using the root key construction method of the root key constructing device of radical bored concrete pile |
| CN106930261A (en) * | 2017-04-19 | 2017-07-07 | 合肥学院 | A kind of simple ocean platform in intertidal zone and its construction method |
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