CN112252359A - Novel pile foundation jacket foundation grouting connecting section structure and construction method - Google Patents
Novel pile foundation jacket foundation grouting connecting section structure and construction method Download PDFInfo
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- CN112252359A CN112252359A CN202011335601.XA CN202011335601A CN112252359A CN 112252359 A CN112252359 A CN 112252359A CN 202011335601 A CN202011335601 A CN 202011335601A CN 112252359 A CN112252359 A CN 112252359A
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- 238000010276 construction Methods 0.000 title claims abstract description 17
- 238000003780 insertion Methods 0.000 claims abstract description 47
- 230000037431 insertion Effects 0.000 claims abstract description 46
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 36
- 239000010959 steel Substances 0.000 claims abstract description 36
- 239000011440 grout Substances 0.000 claims abstract description 33
- 239000000463 material Substances 0.000 claims abstract description 33
- 238000007789 sealing Methods 0.000 claims abstract description 17
- 238000007599 discharging Methods 0.000 claims description 12
- 238000003860 storage Methods 0.000 claims description 10
- 239000010802 sludge Substances 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 2
- 210000001503 joint Anatomy 0.000 claims 1
- 239000002689 soil Substances 0.000 abstract description 23
- 238000013461 design Methods 0.000 abstract description 4
- 238000005457 optimization Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 4
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
- E02D27/32—Foundations for special purposes
- E02D27/52—Submerged foundations, i.e. submerged in open water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
-
- 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
-
- 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
- E02D5/285—Prefabricated piles made of steel or other metals tubular, e.g. prefabricated from sheet pile elements
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The utility model provides a pile foundation jacket basis grout linkage segment structure, includes the steel-pipe pile, be provided with the top confined mud barrel that stores up in the steel-pipe pile, the bottom of storing up the mud barrel is provided with the epitaxial plate, the end and the steel-pipe pile inner wall of epitaxial plate link to each other, it constitutes annular grout district with the steel-pipe pile inner wall to store up mud barrel, epitaxial plate, annular grout district interpolation and is equipped with main pipe insertion section, the grout material has been filled between main pipe insertion section and the steel-pipe pile. According to the invention, the soil in the pile is partially led out of the pile and partially stored in the pile, and the grouting connecting section is free of soil and isolated from the interior of the steel pipe pile, so that the problem that the grouting inserting section cannot be arranged below the soil surface is effectively solved on the premise of meeting the structural requirement of the grouting connecting section and the safety of the pile foundation jacket structure, a series of problems that the soil is sucked, the number of steel pipe pile cantilevers is too long, the sealing property of the lower end of the grouting connecting section cannot be ensured, the steel pipe is wasted and the like are further avoided, and the safety, the construction convenience and the structure optimization design of the foundation structure are improved.
Description
Technical Field
The invention relates to the field of arrangement of foundation structures of ocean engineering, in particular to a grouting connection section structure of a pile foundation jacket foundation and a construction method.
Background
At present, the construction of offshore wind power plants in China is gradually promoted to the deep open sea, and a jacket foundation has remarkable advantages in a deep water environment and has a large-scale application trend in the field of offshore wind power in China. The jacket foundation is divided into a pile foundation and a jacket, the jacket is inserted into the pile foundation through the main pipe insertion section, and grouting materials are filled in an annular space between the insertion section and the pile foundation. The main duct insertion section, the grouting material and the grouting connecting section formed by the steel pipe pile are key structures of force transmission of the guide pipe frame and the pile foundation, according to the characteristics of grouting material products, the surface of the inner wall of the steel pipe pile and the surface of the outer wall of the insertion section need to be kept clean, and the bonding force of the grouting material can be effectively exerted, so that the grouting connecting section is usually arranged above a mud surface.
At the present stage, in order to ensure the structure safety, the bearing length of the grouting insertion section of the deepwater jacket foundation is longer, the soil plug effect in the steel pipe pile driving process is considered, the soil in the pile is higher than the soil outside the pile after the pile driving is finished, and the steel pipe pile needs to be exposed out of the soil surface for a longer distance in order to ensure that the grouting connection section avoids the soil in the pile. The structural scheme can lead the cantilever section of the steel pipe pile to be longer, thereby providing high requirements for the bearing capacity of the grouting connecting section. Secondly, this section is located more than the mud face, and the steel-pipe pile can't play bearing effect with ground contact, sees from the pile foundation bearing mode that this section sets up more than the mud face and has caused the waste to the steel-pipe pile. Meanwhile, the existing structure needs to arrange a sealing ring below the grouting section as a sealing and grout stopping device, and the sealing ring is expensive and cannot completely ensure the sealing property. If the grout can not be effectively sealed and stopped, great waste can be caused to grouting, and the construction period is prolonged. In addition, if the actual soil plug height in the pile is greater than the reserved soil plug height when in design, the soil suction treatment is needed to be carried out so as to ensure that no soil exists in the grouting connecting section range, the soil suction construction difficulty in the pile in the deepwater sea area is large, the efficiency is low, the soil suction effect is limited, the cleanness of the inner wall of the pile can not be effectively guaranteed to meet the design requirement, the bonding force of grouting materials is greatly reduced, and great hidden danger is brought to the safe operation of the pile foundation guide pipe frame foundation.
Disclosure of Invention
The invention aims to provide a grouting connecting section structure of a pile foundation jacket foundation and a construction method, which can solve the problem that a grouting inserting section cannot be arranged below a mud surface on the premise of ensuring safety.
The technical scheme of the invention is as follows: the utility model provides a pile foundation jacket basis grout linkage segment structure, includes the steel-pipe pile, be provided with the top confined mud barrel that stores up in the steel-pipe pile, the bottom of storing up the mud barrel is provided with the epitaxial plate, the end and the steel-pipe pile inner wall of epitaxial plate link to each other, it constitutes annular grout district with the steel-pipe pile inner wall to store up mud barrel, epitaxial plate, annular grout district interpolation and is equipped with main pipe insertion section, the grout material has been filled between main pipe insertion section and the steel-pipe pile.
Furthermore, the extending plate is in a horn shape with a small upper part and a large lower part, the tail end of the extending plate is connected with the inner wall of the steel pipe pile in a sealing welding mode, the extending plate and the mud storage cylinder divide the steel pipe pile into an upper part and a lower part which are not communicated with each other, the upper part of the extending plate is a connecting section, and the lower part of the extending plate is a mud storage section.
Further, store up mud section top and evenly be provided with a plurality of mud discharge through-holes along the circumferencial direction, the periphery in mud discharge hole is provided with the reinforcing plate.
Furthermore, the top of the main duct inserting section is provided with a plurality of upper guide keys at equal intervals along the circumferential direction, the bottom of the main duct inserting section is provided with a plurality of lower guide keys at equal intervals along the circumferential direction, and the height of each guide key is not less than the minimum grouting thickness.
Furthermore, chamfers are arranged at the bottoms of the upper guide key and the lower guide key.
Furthermore, a plurality of steel pipe pile shear rings are arranged on the inner wall of the connecting section at equal intervals along the axis direction of the steel pipe pile, and a plurality of inserting section shear rings are arranged on the main guide pipe inserting section at equal intervals between the upper guide key and the lower guide key.
Furthermore, the grouting material comprises a bottom sealing grouting material and a bearing grouting material.
Furthermore, the main duct insertion section is a steel round tube, the outer diameter of the round tube is smaller than the inner diameter of the steel pipe pile, the inner diameter of the round tube is larger than the outer diameter of the sludge storage barrel, the upper end of the main duct insertion section is connected with the main duct of the jacket, and the lower end of the main duct insertion section is in contact with the top surface of the epitaxial plate after insertion.
A construction method of a pile foundation jacket foundation grouting connecting section structure comprises the following steps:
(1) processing and manufacturing the steel pipe pile in a factory;
(2) carrying out offshore pile sinking construction on the steel pipe pile in a designated sea area, wherein in the pile sinking process, mud is not contained in the annular grouting area through a mud discharging mode of a mud discharging hole and a mud storing mode of a mud storing cabin, and the pile is sunk until the pile top of the steel pipe pile is slightly higher than the mud surface outside the pile;
(3) inserting the main conduit insertion section into the annular grouting area;
(4) grouting bottom sealing grouting materials into the annular grouting area by using a marine stirring boat;
(5) and after the bottom sealing grouting material is initially set, filling the bearing grouting material into the annular grouting area by using a marine stirring boat.
Compared with the prior art, the invention has the following advantages: according to the invention, the soil in the pile is partially led out of the pile and partially stored in the pile, and the grouting connecting section is free of soil and isolated from the interior of the steel pipe pile, so that the problem that the grouting inserting section cannot be arranged below the soil surface is effectively solved on the premise of meeting the structural requirement of the grouting connecting section and the safety of the pile foundation jacket structure, a series of problems that the soil is sucked, the number of steel pipe pile cantilevers is too long, the sealing property of the lower end of the grouting connecting section cannot be ensured, the steel pipe is wasted and the like are further avoided, and the safety, the construction convenience and the structure optimization design of the foundation structure are improved.
Drawings
FIG. 1 is a schematic view of the finished structure of the present invention;
FIG. 2 is a schematic diagram of a steel pipe pile after pile sinking construction is completed;
FIG. 3 is a schematic view of the main conduit insertion section after insertion into the annular grouting area;
FIG. 4 is a schematic view after pouring of a back-sealing grouting material;
FIG. 5 is a schematic view after grouting a load-bearing grouting material;
in the figure: 1-soil, 2-sludge storage barrel, 3-epitaxial plate, 4-main conduit insertion section, 5-connecting section, 6-sludge storage section, 7-sludge discharge through hole, 8-reinforcing plate, 9-upper guide key, 10-lower guide key, 11-steel pipe pile shear ring, 12-insertion section shear ring, 13-bottom sealing grouting material, 14-bearing grouting material and 15-sludge surface.
Detailed Description
In order to make the aforementioned features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below, but the present invention is not limited thereto.
Refer to fig. 1-5.
In a preferred embodiment of the present invention: the utility model provides a pile foundation jacket basis grout linkage segment structure, includes the steel-pipe pile, be provided with the top confined mud barrel that stores up in the steel-pipe pile, the bottom of storing up the mud barrel is provided with the epitaxial plate, the epitaxial plate with store up mud barrel integrated into one piece, the end of epitaxial plate links to each other with the steel-pipe pile inner wall, store up mud barrel, epitaxial plate and steel-pipe pile inner wall and constitute annular grout district, annular grout district interpolation is equipped with main pipe insertion section, the top of main pipe insertion section links to each other with the jacket main pipe, it has the grout material to fill between main pipe insertion section and the steel-pipe pile.
In this embodiment, the epitaxial plate is the loudspeaker form that big end down, and the connected mode of its end and steel-pipe pile inner wall is seal weld, avoids earth among the steel-pipe pile to invade annular grout district, the epitaxial plate is divided into upper and lower two parts that do not communicate with each other with storing up a mud section of thick bamboo with the steel-pipe pile, and its upper portion is the linkage segment, and its lower part is for storing up a mud section.
In this embodiment, store up mud section top and evenly be provided with a plurality of mud discharging through-holes along the circumferencial direction, when laying the steel-pipe pile, avoid the soil plug effect to lead to can't deepening, the soil that reachs and store up mud section top is discharged from the mud discharging through-hole, the periphery in mud discharging hole is provided with the reinforcing plate to avoid the mud discharging through-hole to destroy under great soil pressure.
In this embodiment, the top of main pipe insertion section is provided with a plurality of upper guide keys along the circumferencial direction equidistance to main pipe insertion section inserts the steel-pipe pile, the bottom of main pipe insertion section is provided with a plurality of lower guide keys along the circumferencial direction equidistance, so that main pipe insertion section inserts the steel-pipe pile, the height of guide key is not less than minimum grout thickness, satisfies the user demand with minimum grout thickness in guaranteeing the work progress.
In this embodiment, the bottoms of the upper guide key and the lower guide key are both provided with chamfers, so that the main guide pipe insertion section can be conveniently inserted into the steel pipe pile.
In this embodiment, for the area of contact of increase steel-pipe pile and main conduit insertion section and grout material, the inner wall of linkage segment is provided with a plurality of steel-pipe pile shear rings along steel-pipe pile axis direction equidistance, main conduit insertion section is provided with a plurality of insertion section shear rings at the equidistance between last guide key and the lower guide key, and steel-pipe pile shear ring and the crisscross setting of insertion section shear ring avoid influencing the grout material and flow.
In this embodiment, the grout material includes back cover grout material and bears the weight of grout material, back cover grout material is located the juncture of main pipe insertion section and epitaxial plate top surface, guarantees that grout material can not flow backward main pipe insertion section, bear grout material and be used for bearing the power between main pipe insertion section and the steel-pipe pile.
In this embodiment, main duct insertion section is the steel pipe, and the pipe external diameter is less than the steel-pipe pile internal diameter, and the pipe internal diameter is greater than a storage mud section of thick bamboo external diameter, and the upper end of main duct insertion section links to each other with jacket main duct, and the lower extreme contacts with the epitaxial board top surface after inserting the completion.
A construction method of a pile foundation jacket foundation grouting connecting section structure comprises the following steps:
(1) processing and manufacturing the steel pipe pile in a factory;
(2) carrying out offshore pile sinking construction on the steel pipe pile in a designated sea area, wherein in the pile sinking process, mud is not contained in the annular grouting area through a mud discharging mode of a mud discharging hole and a mud storing mode of a mud storing cabin, and the pile is sunk until the pile top of the steel pipe pile is slightly higher than the mud surface outside the pile;
(3) inserting the main conduit insertion section into the annular grouting area;
(4) grouting bottom sealing grouting materials into the annular grouting area by using a marine stirring boat;
(5) and after the bottom sealing grouting material is initially set, filling the bearing grouting material into the annular grouting area by using a marine stirring boat.
It will be apparent to those skilled in the art that the above embodiments are only preferred embodiments of the present invention, and it is not necessary to create any inventive work in designing a new grouting connection section structure for pile foundation jacket foundation and a construction method thereof according to the teachings of the present invention, and all equivalent changes, modifications, substitutions and alterations made herein without departing from the spirit and scope of the present invention are all within the scope of the present invention.
Claims (9)
1. The utility model provides a pile foundation jacket basis grout linkage segment structure, includes the steel-pipe pile, its characterized in that, be provided with the top confined mud barrel that stores up in the steel-pipe pile, the bottom of storing up the mud barrel is provided with the epitaxial plate, the end and the steel-pipe pile inner wall of epitaxial plate link to each other, it constitutes annular grout district to store up mud barrel, epitaxial plate and steel-pipe pile inner wall, the interpolation is equipped with main pipe insertion section in the annular grout district, it has the grout material to fill between main pipe insertion section and the steel-pipe pile.
2. The grouting connection section structure for a pile foundation jacket foundation according to claim 1, wherein the extension plate is in a horn shape with a small top and a large bottom, the tail end of the extension plate is connected with the inner wall of the steel pipe pile in a sealing welding mode, the extension plate and the sludge storage cylinder divide the steel pipe pile into an upper part and a lower part which are not communicated with each other, the upper part is a connection section, and the lower part is a sludge storage section.
3. The grouting connection section structure for the foundation of a pile foundation jacket according to claim 2, wherein a plurality of mud discharging through holes are uniformly formed in the top of the mud storage section in the circumferential direction, and reinforcing plates are arranged on the peripheries of the mud discharging holes.
4. The grouting connection section structure of a pile foundation jacket foundation according to claim 2, wherein a plurality of upper guide keys are equidistantly arranged on the top of the main conduit insertion section along the circumferential direction, a plurality of lower guide keys are equidistantly arranged on the bottom of the main conduit insertion section along the circumferential direction, and the height of each guide key is not less than the minimum grouting thickness.
5. A pile foundation jacket foundation grouting connection section structure as claimed in claim 4, wherein the bottoms of the upper guide key and the lower guide key are provided with chamfers.
6. The grouting connection section structure of a pile foundation jacket foundation according to claim 4, characterized in that a plurality of steel pipe pile shear rings are equidistantly arranged on the inner wall of the connection section along the axis direction of the steel pipe pile, and a plurality of insertion section shear rings are equidistantly arranged on the main pipe insertion section between the upper guide key and the lower guide key.
7. The grouting connection section structure of a pile foundation and jacket foundation according to claim 1, wherein the main conduit insertion section is a steel round pipe, the outer diameter of the round pipe is smaller than the inner diameter of the steel pipe pile, the inner diameter of the round pipe is larger than the outer diameter of the sludge storage barrel, the upper end of the main conduit insertion section is connected with the main conduit of the jacket, and the lower end of the main conduit insertion section is in contact with the top surface of the extension plate after insertion.
8. The pile foundation jacket foundation grout joint section structure of claim 1, wherein the grout comprises back cover grout and load bearing grout.
9. A construction method of a grouting connection section structure of a pile foundation jacket foundation according to any one of claims 1 to 8, characterized by comprising the following steps:
1) processing and manufacturing the steel pipe pile in a factory;
2) carrying out offshore pile sinking construction on the steel pipe pile in a designated sea area, wherein in the pile sinking process, mud is not contained in the annular grouting area through a mud discharging mode of a mud discharging hole and a mud storing mode of a mud storing cabin, and the pile is sunk until the pile top of the steel pipe pile is slightly higher than the mud surface outside the pile;
3) inserting the main conduit insertion section into the annular grouting area;
4) grouting bottom sealing grouting materials into the annular grouting area by using a marine stirring boat;
5) and after the bottom sealing grouting material is initially set, filling the bearing grouting material into the annular grouting area by using a marine stirring boat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011335601.XA CN112252359A (en) | 2020-11-25 | 2020-11-25 | Novel pile foundation jacket foundation grouting connecting section structure and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011335601.XA CN112252359A (en) | 2020-11-25 | 2020-11-25 | Novel pile foundation jacket foundation grouting connecting section structure and construction method |
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| CN112252359A true CN112252359A (en) | 2021-01-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113653092A (en) * | 2021-07-28 | 2021-11-16 | 中国能源建设集团广东省电力设计研究院有限公司 | Double-pile sleeve type foundation and installation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201506979U (en) * | 2009-09-14 | 2010-06-16 | 中国水利水电科学研究院 | Grouting connection structure for pile foundation and jacket leg of offshore wind turbine |
| CN204825949U (en) * | 2015-05-31 | 2015-12-02 | 中国电建集团华东勘测设计研究院有限公司 | Marine fan basis connection structure of pipe posture of driving piles in advance |
| JP2017115374A (en) * | 2015-12-22 | 2017-06-29 | 株式会社熊谷組 | Pipe joining method |
| CN110106904A (en) * | 2019-04-10 | 2019-08-09 | 中国能源建设集团广东省电力设计研究院有限公司 | A kind of steel tube pile structure and jacket foundation working process |
| CN214033778U (en) * | 2020-11-25 | 2021-08-24 | 福建省水利水电勘测设计研究院 | Novel pile foundation jacket foundation grouting connecting section structure |
-
2020
- 2020-11-25 CN CN202011335601.XA patent/CN112252359A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201506979U (en) * | 2009-09-14 | 2010-06-16 | 中国水利水电科学研究院 | Grouting connection structure for pile foundation and jacket leg of offshore wind turbine |
| CN204825949U (en) * | 2015-05-31 | 2015-12-02 | 中国电建集团华东勘测设计研究院有限公司 | Marine fan basis connection structure of pipe posture of driving piles in advance |
| JP2017115374A (en) * | 2015-12-22 | 2017-06-29 | 株式会社熊谷組 | Pipe joining method |
| CN110106904A (en) * | 2019-04-10 | 2019-08-09 | 中国能源建设集团广东省电力设计研究院有限公司 | A kind of steel tube pile structure and jacket foundation working process |
| CN214033778U (en) * | 2020-11-25 | 2021-08-24 | 福建省水利水电勘测设计研究院 | Novel pile foundation jacket foundation grouting connecting section structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113653092A (en) * | 2021-07-28 | 2021-11-16 | 中国能源建设集团广东省电力设计研究院有限公司 | Double-pile sleeve type foundation and installation method thereof |
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