CN113898000A - Secant pile cylindrical fan foundation combined with construction guide wall structure and construction method - Google Patents
Secant pile cylindrical fan foundation combined with construction guide wall structure and construction method Download PDFInfo
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- CN113898000A CN113898000A CN202111365173.XA CN202111365173A CN113898000A CN 113898000 A CN113898000 A CN 113898000A CN 202111365173 A CN202111365173 A CN 202111365173A CN 113898000 A CN113898000 A CN 113898000A
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- 238000010276 construction Methods 0.000 title claims abstract description 109
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 24
- 239000010959 steel Substances 0.000 claims abstract description 24
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 8
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 23
- 239000004567 concrete Substances 0.000 claims description 14
- 230000003014 reinforcing effect Effects 0.000 claims description 11
- 230000002787 reinforcement Effects 0.000 claims description 4
- 239000000839 emulsion Substances 0.000 claims 1
- 238000005406 washing Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 238000005452 bending Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000002689 soil Substances 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
- E02D27/44—Foundations for machines, engines or ordnance
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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
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Abstract
The invention provides an occlusive pile cylindrical fan foundation combined with a construction guide wall structure and a construction method, wherein the occlusive pile cylindrical fan foundation comprises a fan foundation bearing platform and a cylindrical structure, the bearing platform is positioned at the top end of the cylindrical structure, reinforced concrete annular construction guide walls are arranged on the inner side and the outer side of the upper part of the cylindrical structure, vertical inserting bars are reserved on the upper surface of the structure of the construction guide wall, the vertical inserting bars extend into the fan foundation bearing platform, horizontal radial embedded steel bar sleeves are embedded in the construction guide wall, horizontal radial steel bars are inserted into the horizontal radial embedded steel bar sleeves, the horizontal radial steel bars extend into the bearing platform, and the construction guide wall is poured in the fan foundation bearing platform to be a part of the structure; the invention utilizes the construction guide wall structure required in the construction period to carry out structural treatment on the structure before the pouring of the bearing platform of the fan foundation, enlarges the section size of the connecting part of the tubular type of the secant pile and the bearing platform, and leads the section size to become a part of a permanent structure body, thereby avoiding the dismantling of the construction guide wall, optimizing the body type of the connecting structure of the bearing platform and the tubular type, improving the construction efficiency and saving the construction cost.
Description
Technical Field
The invention relates to the field of wind power plants, in particular to an occlusive pile cylindrical fan foundation combined with a construction guide wall structure and a construction method.
Background
The wind turbine foundation is an important component part for building a wind power plant, and not only is the safe and reliable operation of the wind power plant concerned, but also the investment of the wind power plant is influenced. According to the adaptability of geological conditions, the existing common fan foundations comprise an extended fan foundation and a pile foundation, the extended foundation mainly utilizes the gravity of the extended foundation to resist the large bending moment load of an upper structure, and the extended foundation is adopted after foundation treatment is carried out on the extended foundation when the geological conditions are weak. The pile foundation is adopted under the condition that the natural foundation does not meet the requirements of bearing capacity, deformation and the like of a foundation structure, the vertical action of the pile is utilized to bear the bending moment load of an upper structure, and a bearing platform is arranged to be connected with a foundation pile to form an integral structure. The secant pile cylindrical fan foundation is a cylindrical wall structure formed by using a secant pile process, and the action of the horizontal resistance of a soil body on the side surface of the structure on resisting the large bending moment of a fan is fully utilized.
The tubular fan foundation of the secant pile takes a tubular shape formed by the secant pile as an important stressed structure, the requirement on the construction positioning precision of the secant pile is higher, the traditional retaining wall structure adopts a construction method of positioning by adopting a construction guide wall structure, but the traditional construction guide wall is only used for positioning in the construction period, and the secant pile is dismantled after the construction is completed. For example, in the patent with publication number CN112854288A, the underground continuous wall is embedded into the bottom surface of the reinforced concrete bearing platform and connected as a whole, and the inner and outer sides of the underground wall are provided with reinforced concrete guide walls which play a role in guiding and fixing during construction, but the reinforced concrete guide walls need to be broken when the foundation pit of the bearing platform is excavated after the construction of the underground continuous wall is completed. The problem of the weak link of the variable-step surface of the sudden change of the structural rigidity of the connection surface of the fan foundation bearing platform and the cylindrical structure is not solved, the guide wall is only used as a temporary structure during construction, and the concrete strength and the engineering quantity of the guide wall are not fully utilized.
Disclosure of Invention
The invention provides an occlusive pile cylindrical fan foundation combined with a construction guide wall structure and a construction method.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a secant pile tubular fan basis of wall structure is led in combination construction, includes fan foundation cushion cap and shell type structure, and the cushion cap is located shell type structure top, and the wall is led in the inboard and outside setting up reinforced concrete annular construction in shell type structure upper portion, and the wall is led in the construction upper surface reservation vertical dowel steel, vertical dowel steel stretches into fan foundation cushion cap, and the radial embedded bar sleeve of pre-buried level in the wall is led in the construction, ann inserts the radial reinforcing bar of level in the radial embedded bar sleeve of level, and the radial reinforcing bar of level stretches into the cushion cap.
The diameter of the horizontal radial embedded steel bar sleeve is the diameter of the horizontal radial steel bar plus 3mm, the inner side and the outer side of the horizontal radial embedded steel bar sleeve are arranged in a quincunx manner, and the distance is not more than 250 mm.
The length of the horizontal radial reinforcing steel bar extending out of the inner side of the guide wall is not less than the diameter of the guide wall; the diameter of the horizontal radial reinforcing steel bar is not less than 16 mm.
The diameter of the vertical dowel bars is not less than 12mm, the length of the vertical dowel bars is not less than 800mm, the diameter of the vertical dowel bars in the construction guide wall and the diameter of the exposed parts of the vertical dowel bars are not less than 35 times of the diameter of the vertical dowel bars, and the horizontal distance of the vertical dowel bars is not more than 250 mm.
Radial annular or latticed reinforcing steel bar nets with the diameters of reinforcing steel bars not less than 12mm and the intervals not more than 200mm are arranged on the upper surface, the inner side annular and the outer side annular of the construction guide wall.
The concrete grade of the construction guide wall is not lower than that of the secant pile, the concrete grade of the construction guide wall is lowest lower than that of the fan foundation bearing platform by 1 grade, and the width of the construction guide wall is not less than 1m of both sides of the secant pile.
The height of the construction guide wall takes the height of the bottom of the bearing platform as a reference level, the top surface of the construction guide wall is 200mm higher than the height of the bottom of the bearing platform, and the bottom surface of the construction guide wall is not less than 200mm lower than the height of the bottom of the bearing platform.
A wind driven generator adopts the secant pile cylindrical fan foundation of the combined construction guide wall structure.
The invention relates to a construction method of an occlusive pile cylindrical fan foundation combined with a construction guide wall structure, which comprises the following steps:
after the hole forming of each secant pile is finished, inserting horizontal radial reinforcing steel bars into horizontal radial embedded reinforcing steel bar sleeves of the corresponding construction guide wall within the diameter range of the pile to be poured, wherein the horizontal radial reinforcing steel bars penetrate through the construction guide wall, and an exposed section with a preset length is reserved on the inner side of the construction guide wall;
concrete pouring of the secant pile is carried out according to the construction sequence of the secant pile, and when the final structure is formed by pouring of one secant pile, horizontal radial reinforcing steel bars within the arc length range of the corresponding construction guide wall are adjusted to be radial;
after the construction of all the secant piles is completed, exposed inserting bars are arranged on the upper surface and the inner side ring surface of the construction guide wall, the construction guide wall is not detached, the vertical inserting bars and the exposed inserting bars are bound with reinforcing steel bars in the fan foundation bearing platform, and the vertical inserting bars and the exposed inserting bars are poured into the fan foundation bearing platform to serve as a part of the structure.
Compared with the prior art, the invention has at least the following beneficial effects: the invention utilizes the construction guide wall structure required in the construction period to carry out structural treatment before the pouring of the bearing platform of the fan foundation, enlarges the size of the cylindrical top surface of the secant pile to form a part of a permanent structure body, thereby not only avoiding the dismantling of the construction guide wall, but also optimizing the body type of the connecting structure of the bearing platform and the cylindrical, improving the construction efficiency and saving the construction cost.
Drawings
FIG. 1 is a schematic cross-sectional elevation view of one possible embodiment of the present invention.
FIG. 2 is a schematic top view of one possible implementation of the present invention.
Fig. 3 is a schematic cross-sectional view of a partially constructed reinforcing bar.
Fig. 4 is a schematic plan view of a partially constructed reinforcing bar.
In the figure: 1-a fan foundation bearing platform; 2-occlusive piles; 3, constructing a guide wall; 4-vertical dowel bars; 5-embedding a steel bar sleeve horizontally and radially; 6-horizontal radial steel bars; 7-reinforcing mesh.
Detailed Description
The invention is explained in detail below with reference to the drawings and the detailed description.
Fig. 1 is a schematic view of a construction guide wall structure for a secant pile tubular fan foundation, fig. 2 is a schematic plan view of a section a-a shown in fig. 1, and fig. 3 and 4 are schematic views of a partially enlarged structure and reinforcing bars of the construction guide wall structure.
Referring to fig. 1, 2 and 3, an interlock pile tubular fan foundation of wall structure is led in combination construction, including fan foundation cushion cap 1 and tubular structure, the cushion cap is located tubular structure top, and tubular structure upper portion inboard sets up reinforced concrete annular construction guide wall 3 with the outside, and vertical dowel steel 4 is reserved to the structure upper surface of construction guide wall 3, vertical dowel steel 4 stretches into fan foundation cushion cap, and the radial embedded bar sleeve 5 of pre-buried level in the construction guide wall 3, the radial reinforcing bar 6 of level is inserted in the radial embedded bar sleeve 5 of level, and the radial reinforcing bar 6 of level stretches into the cushion cap.
The length of the horizontal radial reinforcing steel bars 6 extending out of the inner side of the guide wall 3 is not less than 35 times of the diameter of the horizontal radial reinforcing steel bars; the diameter of the horizontal radial reinforcing steel bars 6 is not less than 16 mm.
Radial annular or grid reinforcing mesh 7 with the diameter of reinforcing steel bars not less than 12mm and the distance not more than 200mm is arranged on the upper surface, the inner annular and the outer annular of the construction guide wall 3.
A wind driven generator adopts the secant pile cylindrical fan foundation of the combined construction guide wall structure.
The upper part of the pile top of the secant pile 2 is provided with a reinforced concrete annular construction guide wall 3, vertical inserted bars 4 are reserved on the upper surface of the construction guide wall 3, horizontal radial embedded steel bar sleeves 5 are embedded in the construction guide wall 3, radial steel bars 6 are inserted in the construction process of the secant pile 2, after the complete construction of the secant pile 2 is completed, exposed inserted bars are arranged on the upper surface and the inner and outer side ring surfaces of the construction guide wall 3, the construction guide wall 3 is not detached, and the guide wall is poured in the fan foundation bearing platform 1 to serve as a part of the structure.
After the pore-forming of each secant pile 2 is finished, inserting horizontal radial reinforcing steel bars 6 in horizontal radial embedded steel bar sleeves 5 of the corresponding construction guide wall 3 in the diameter range of the pile to be poured, wherein the horizontal radial reinforcing steel bars 6 penetrate through the construction guide wall 3, and the inner side of the guide wall 3 is not less than 35d2The length is exposed.
Diameter d of vertical dowel 41Not less than 12mm, not less than 800mm in length, and not less than 35d for each of the inserted guide wall and the exposed part1The horizontal spacing is typically no greater than 250 mm.
The concrete of the construction guide wall 3 is not lower than the concrete mark of the secant pile, generally can be lower than the concrete mark of the fan foundation bearing platform by 1, generally can be C35, and the whole width of the construction guide wall 3 is the diameter of the secant pile plus the width of each of two sides of the secant pile is not less than 1 m.
The height of the construction guide wall 3 takes the height of the bottom of the bearing platform as a reference level, the top surface is 200mm higher than the height of the bottom of the bearing platform, and the bottom surface is not less than 200mm lower than the height of the bottom of the bearing platform.
The construction guide wall 3 is provided with radial annular or grid reinforcing steel bar nets 7 with the diameter of reinforcing steel bars not less than 12mm and the distance not more than 200mm on the upper surface, the inner side annular and the outer side annular.
The diameter of the horizontal radial embedded steel bar sleeve 5 of the construction guide wall 3 is generally the diameter of the horizontal radial steel bar 6 plus 3mm, the steel bar sleeve 5 is arranged on the inner side and the outer side in a quincunx shape, and the distance is generally not more than 250 mm.
Diameter d of horizontal radial reinforcement 62Not less than 16 mm.
Claims (10)
1. The utility model provides a secant pile tubular fan basis that wall structure is led in combination construction, a serial communication port, including fan basis cushion cap (1) and shell type structure, the cushion cap is located shell type structure top, and the inboard and outside in shell type structure upper portion sets up reinforced concrete annular construction and leads wall (3), and vertical dowel steel (4) are reserved to the structure upper surface of wall (3) are led in the construction, vertical dowel steel (4) stretch into fan basis cushion cap, and the radial embedded bar sleeve pipe of pre-buried level (5) in wall (3) is led in the construction, lay horizontal radial reinforcing bar (6) in the radial embedded bar sleeve pipe of level (5), horizontal radial reinforcing bar (6) stretch into the cushion cap.
2. The secant pile tubular fan foundation of the combined construction guide wall structure according to claim 1, wherein the diameter of the horizontal radial embedded steel bar sleeve (5) is the diameter of the horizontal radial steel bar plus 3mm, the horizontal radial embedded steel bar sleeve (5) is arranged in a quincunx shape on the inner side and the outer side, and the distance is not more than 250 mm.
3. The spud-in-pile-tube type fan foundation in combination with a construction guide wall structure according to claim 1, wherein the horizontal radial direction reinforcing bars (6) extend out of the inside of the guide wall (3) by a length not less than (35) times its diameter; the diameter of the horizontal radial reinforcing steel bar (6) is not less than 16 mm.
4. The secant pile tubular fan foundation combined with the construction guide wall structure as recited in claim 1, wherein the vertical dowel (4) has a diameter of not less than 12mm and a length of not less than 800mm, the vertical dowel (4) has a diameter of not less than 35 times of the diameter of the vertical dowel (4) in the construction guide wall (3) and in the exposed part, and the horizontal distance is not more than 250 mm.
5. The spud-pile-tube type wind turbine foundation combined with a construction guide wall structure according to claim 1, wherein radial hoop or grid mesh reinforcements (7) having a reinforcement diameter of not less than 12mm and a reinforcement pitch of not more than 200mm are arranged on the upper surface, inside hoop and outside hoop of the construction guide wall (3).
6. The secant pile tubular fan foundation combined with the construction guide wall structure as recited in claim 1, wherein the concrete of the construction guide wall (3) is not less than the concrete mark of the secant pile, the concrete mark of the construction guide wall (3) is at least 1 mark lower than the concrete of the fan foundation bearing platform, and the width of the construction guide wall (3) is not less than 1m on both sides of the secant pile.
7. The secant pile tubular fan foundation combined with the construction guide wall structure as recited in claim 1, wherein the height of the construction guide wall (3) is set with reference to the height of the bottom of the platform, the top surface is 200mm higher than the height of the bottom of the platform, and the bottom surface is not less than 200mm lower than the height of the bottom of the platform.
8. A wind power generator, characterized in that a secant pile tubular wind turbine foundation in combination with a construction guide wall structure according to any one of claims 1 to 7 is used.
9. The construction method of a secant pile tubular fan foundation incorporating the construction guide wall structure as recited in any one of claims 1 to 7, comprising the steps of:
after the hole forming of each secant pile is finished, inserting horizontal radial reinforcing steel bars (6) into horizontal radial embedded reinforcing steel bar sleeves (5) of the corresponding construction guide wall within the diameter range of the pile to be poured, wherein the horizontal radial reinforcing steel bars (6) penetrate through the construction guide wall (3), and an exposed section with a preset length is reserved on the inner side of the construction guide wall;
concrete pouring of the secant pile is carried out according to the construction sequence of the secant pile, and when the pouring of a secant pile is finished to form the final structure, horizontal radial reinforcing steel bars (6) in the arc length range of the corresponding construction guide wall are adjusted to be radial;
after the construction of all the secant piles is completed, exposed inserting bars are arranged on the upper surface and the inner side annular surface of the construction guide wall (3), the construction guide wall is not detached, the vertical inserting bars (4) and the exposed inserting bars are bound with reinforcing steel bars in the fan foundation bearing platform (1), and the vertical inserting bars and the exposed inserting bars are poured into the fan foundation bearing platform to serve as a part of the structure.
10. The construction method according to claim 9, wherein the construction of the joint surface between the construction guide wall (3) and the bearing platform requires the construction treatment of manually removing the surface emulsion of the concrete and washing with clear water before the concrete of the bearing platform is poured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111365173.XA CN113898000A (en) | 2021-11-17 | 2021-11-17 | Secant pile cylindrical fan foundation combined with construction guide wall structure and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111365173.XA CN113898000A (en) | 2021-11-17 | 2021-11-17 | Secant pile cylindrical fan foundation combined with construction guide wall structure and construction method |
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| Publication Number | Publication Date |
|---|---|
| CN113898000A true CN113898000A (en) | 2022-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111365173.XA Pending CN113898000A (en) | 2021-11-17 | 2021-11-17 | Secant pile cylindrical fan foundation combined with construction guide wall structure and construction method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212835365U (en) * | 2020-06-09 | 2021-03-30 | 广州协安建设工程有限公司 | Construction structure of PHC tubular pile |
| CN112922020A (en) * | 2021-03-11 | 2021-06-08 | 同济大学建筑设计研究院(集团)有限公司 | Fan cylindrical foundation consisting of secant piles and construction method |
| CN216238625U (en) * | 2021-11-17 | 2022-04-08 | 华能清能通榆电力有限公司 | Secant pile cylindrical fan foundation combined with construction guide wall structure and wind driven generator |
-
2021
- 2021-11-17 CN CN202111365173.XA patent/CN113898000A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212835365U (en) * | 2020-06-09 | 2021-03-30 | 广州协安建设工程有限公司 | Construction structure of PHC tubular pile |
| CN112922020A (en) * | 2021-03-11 | 2021-06-08 | 同济大学建筑设计研究院(集团)有限公司 | Fan cylindrical foundation consisting of secant piles and construction method |
| CN216238625U (en) * | 2021-11-17 | 2022-04-08 | 华能清能通榆电力有限公司 | Secant pile cylindrical fan foundation combined with construction guide wall structure and wind driven generator |
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Application publication date: 20220107 |
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| RJ01 | Rejection of invention patent application after publication |