CN120250706A - An assembled prefabricated wind power tower foundation and construction method thereof - Google Patents
An assembled prefabricated wind power tower foundation and construction method thereof Download PDFInfo
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- CN120250706A CN120250706A CN202510758684.XA CN202510758684A CN120250706A CN 120250706 A CN120250706 A CN 120250706A CN 202510758684 A CN202510758684 A CN 202510758684A CN 120250706 A CN120250706 A CN 120250706A
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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
- E02D27/42—Foundations for poles, masts or chimneys
- E02D27/425—Foundations for poles, masts or chimneys specially adapted for wind motors masts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
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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
- E02D15/08—Sinking workpieces into water or soil inasmuch as not provided for elsewhere
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Abstract
本发明公开了一种装配式预制风电塔筒基础及其施工方法，该装置包括多个塔筒基础预制单元，塔筒基础预制单元包括塔筒基础连接部和塔筒基础支撑部，塔筒基础支撑部为框架结构，塔筒基础连接部的拼接侧设置有多个弧形钢筋，相邻两个塔筒基础支撑部之间通过钢绞线拉结固定；该方法包括以下步骤：一、确定塔筒基础预制单元的数量；二、工厂预制塔筒基础预制单元；三、将预制好的塔筒基础预制单元运输至施工场地；四、在施工场地定位出多个塔筒基础预制单元的位置；五、借助钢绞线拼装塔筒基础；六、浇筑混凝土。本发明结构设计合理，施工方法简便，能有效减少材料冗余填充，大幅减轻自重，降低运输和吊装难度，实现快速安拆。
The present invention discloses an assembled prefabricated wind power tower foundation and a construction method thereof, the device comprises a plurality of tower foundation prefabricated units, the tower foundation prefabricated units comprise a tower foundation connection part and a tower foundation support part, the tower foundation support part is a frame structure, a plurality of arc-shaped steel bars are arranged on the splicing side of the tower foundation connection part, and two adjacent tower foundation support parts are tied and fixed by steel strands; the method comprises the following steps: 1. determining the number of tower foundation prefabricated units; 2. prefabricating tower foundation prefabricated units in a factory; 3. transporting the prefabricated tower foundation prefabricated units to a construction site; 4. locating the positions of a plurality of tower foundation prefabricated units at the construction site; 5. assembling the tower foundation with the help of steel strands; 6. pouring concrete. The present invention has a reasonable structural design and a simple construction method, can effectively reduce redundant material filling, greatly reduce dead weight, reduce the difficulty of transportation and hoisting, and realize rapid installation and disassembly.
Description
Technical Field
The invention belongs to the technical field of wind power generation, and particularly relates to an assembled prefabricated wind power tower foundation and a construction method thereof.
Background
In wind power project construction, the construction quality and efficiency of a wind power tower foundation play a key role in the stability and economy of the whole wind power system. Traditional wind power tower foundations generally adopt cast-in-place concrete structures or integral prefabricated structures. However, the cast-in-situ construction has the problems of long construction period, large influence by environmental factors such as weather and the like, particularly in remote areas with complex geological conditions or severe weather, the casting and maintenance difficulties are further increased, and the whole prefabricated structure has high transportation and hoisting cost due to large volume and heavy tonnage, and is even limited by road conditions and hoisting equipment capacity.
In the prior art, a part of wind power foundation adopts a block prefabrication mode, but the existing block structure is mostly solid or simple hollow, and the problems of large dead weight, complex connection, insufficient integral rigidity, difficult accurate positioning and the like still exist. Therefore, an assembled prefabricated wind power tower foundation capable of reducing the transportation and hoisting difficulties and guaranteeing the structural stability and the construction convenience and a construction method thereof are needed.
Disclosure of Invention
The invention aims to solve the technical problems of the prior art, and provides an assembled prefabricated wind power tower foundation, which has reasonable structural design and simple construction method, and can effectively reduce redundant filling of materials by designing the prefabricated units of the tower foundation into a frame structure, greatly lighten dead weight compared with a solid structure, reduce transportation and hoisting difficulties, save cost, and adopt steel strands to tie the prefabricated units of the adjacent tower foundation, thereby effectively avoiding stress concentration, effectively enhancing the integrity and stability of the whole wind power tower foundation, being integrally disassembled during disassembly, realizing quick assembly and disassembly and being capable of being repeatedly utilized.
In order to solve the technical problems, the invention adopts the technical scheme that the prefabricated wind power tower foundation comprises a plurality of tower foundation prefabrication units with sector-shaped cross sections, and the plurality of tower foundation prefabrication units are spliced in sequence to form an prefabricated wind power tower foundation with annular cross sections;
Each tower barrel foundation prefabrication unit comprises a tower barrel foundation connecting part serving as a fan-shaped inner arc and a tower barrel foundation supporting part connected with the tower barrel foundation connecting part, wherein a plurality of tower barrel foundation connecting parts are hooped together through hoops to form a hollow barrel-shaped structure, a circular column for connecting a tower barrel is formed after column reinforcement is bound and concrete is poured in the barrel-shaped structure, the tower barrel foundation supporting part is of a frame structure, the splicing side of each tower barrel foundation connecting part is provided with a semicircular hole for burying connecting reinforcement, each semicircular hole is internally provided with a plurality of arc-shaped reinforcement bars from top to bottom, one side, far away from the tower barrel foundation supporting part, of each tower barrel foundation connecting part is provided with an arc-shaped embedded steel plate, each arc-shaped embedded steel plate is anchored on the surface of the tower barrel foundation connecting part through an anchor bar hook, two adjacent arc-shaped embedded steel plates are welded, and two adjacent tower barrel foundation supporting parts are fixed through steel strand tension;
The tower cylinder foundation connecting portion is higher than the tower cylinder foundation supporting portion and lays, the top of tower cylinder foundation supporting portion is by being close to the one end of tower cylinder foundation connecting portion to keeping away from the one end of tower cylinder foundation connecting portion downward sloping gradually.
Further, a stirrup clamping groove for clamping stirrups is formed in the outer cambered surface, extending to the upper part of the tower foundation supporting part, of the tower foundation connecting part.
Further, arc-shaped steel bars between two adjacent tower foundation connecting parts are arranged up and down in a staggered manner and form a steel bar inserting channel for inserting connecting steel bars;
the connecting steel bars are buried in the semicircular holes through concrete and are positioned in the steel bar inserting channels.
Further, the tower foundation connecting part and the tower foundation supporting part are reinforced concrete members and are integrally formed.
Further, the tower section of thick bamboo foundation supporting part includes two symmetrical right trapezoid curb plates of connection in tower section of thick bamboo foundation connecting portion both sides, two keep away from the one end of tower section of thick bamboo foundation connecting portion on the right trapezoid curb plate and be connected with the arc end plate, two still be connected with first horizontal stiffening rib and second horizontal stiffening rib between the right trapezoid curb plate.
Further, two drain holes are reserved on the arc-shaped end plate.
Further, a first steel strand perforation group and a second steel strand perforation group are reserved on the right trapezoid side plate, the first steel strand perforation group is arranged close to a tower foundation connecting part, and the second steel strand perforation group is arranged close to an arc-shaped end plate;
The plurality of steel strand perforations in the first steel strand perforation group are distributed in a hexagonal star shape, and the plurality of steel strand perforations in the second steel strand perforation group are distributed in a triangular shape.
On the other hand, the invention also discloses a construction method of the assembled prefabricated wind power tower foundation, which comprises the following steps:
determining the number of prefabricated units of the tower foundation according to the design size of the prefabricated wind power tower foundation and transportation and hoisting conditions;
Step two, prefabricating a tower foundation prefabricating unit in a factory;
step three, conveying the prefabricated tower foundation prefabricated units to a construction site;
positioning the positions of a plurality of tower foundation prefabrication units in a construction site;
Step five, splicing tower foundation by means of steel strands, namely hoisting and fixing the plurality of tower foundation prefabricated units in place according to the positions of the plurality of positioned tower foundation prefabricated units in sequence, hooping the plurality of tower foundation connecting parts together through hoops after all the tower foundation prefabricated units are hoisted and fixed in place, and enclosing the plurality of tower foundation connecting parts into a circular table post with a cavity in the middle;
Wherein, after the prefabricated unit of a next tower section of thick bamboo foundation is hoisted in place, be connected the prefabricated unit of a next tower section of thick bamboo foundation with the prefabricated unit of a previous tower section of thick bamboo foundation, through following mode:
The adjacent tower foundation prefabricated units are tied through steel strands;
Welding arc-shaped pre-buried steel plates at the front ends of adjacent tower barrel foundation prefabrication units;
And step six, pouring concrete, namely inserting a connecting reinforcing steel bar into round holes formed by every two semicircular holes, pouring concrete, and binding column reinforcing steel bars in the cavity of the circular column and pouring concrete.
Further, before the adjacent tower foundation prefabricated units are tied through the steel strands, the adjacent tower foundation prefabricated units are clamped through the hydraulic clamping device.
Further, the hydraulic clamping device comprises a main body frame and two movable frames hinged to two ends of the main body frame respectively, two hydraulic cylinders used for driving the two movable frames to swing are hinged to the main body frame respectively, a plurality of limiting blocks are arranged at the bottoms of the two ends of the main body frame and the bottoms of the movable frames respectively, and the limiting blocks at the ends of the main body frame and the limiting blocks at the bottoms of the movable frames cooperate to clamp side plates close to each other in the adjacent tower foundation prefabrication units.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, the plurality of fan-shaped tower foundation prefabrication units are spliced in sequence to form the annular wind power tower foundation, so that the factory prefabrication of the tower foundation prefabrication units can be realized, and the construction efficiency can be effectively improved.
2. According to the invention, the tower foundation supporting part is arranged to be of a frame structure, so that redundant filling of materials can be effectively reduced, dead weight is greatly reduced compared with a solid structure, transportation and hoisting difficulties are reduced, and cost is saved.
3. According to the invention, the splicing side of each tower foundation connecting part is provided with the semicircular holes for embedding the connecting steel bars, each semicircular hole is internally provided with the plurality of arc-shaped steel bars connected with the connecting steel bars from top to bottom, and the connecting steel bars and the arc-shaped steel bars can connect two adjacent tower foundation connecting parts, so that the connecting strength of the node is further enhanced, and the stability of the whole structure is improved.
4. According to the invention, the steel strands are used for fixedly tying the two adjacent tower barrel foundation supporting parts, and have high strength and good flexibility, so that the steel strands can uniformly disperse tensile force and avoid stress concentration, thereby effectively enhancing the integrity and stability of the whole wind power tower barrel foundation, and the wind power tower barrel foundation can be integrally disassembled during disassembly, thereby realizing quick assembly and disassembly and being capable of being repeatedly utilized.
In summary, the invention has reasonable structural design and simple construction method, and can effectively reduce redundant filling of materials by designing the tower foundation prefabrication unit into a frame structure, greatly lighten dead weight compared with a solid structure, reduce transportation and hoisting difficulty, save cost, and effectively avoid stress concentration by adopting the steel twisted wires to tie the adjacent tower foundation prefabrication units, thereby effectively enhancing the integrity and stability of the whole wind power tower foundation, being integrally detached during disassembly, realizing quick assembly and disassembly and being capable of being repeatedly utilized.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
FIG. 1 is a perspective view of the foundation of a wind power tower of the present invention.
FIG. 2 is a front view of the foundation of the wind power tower of the present invention.
Fig. 3 is a perspective view of a tower foundation prefabrication unit according to the present invention.
Fig. 4 is a side view of a tower foundation prefabrication unit according to the present invention.
Fig. 5 is a perspective view of an arc-shaped pre-buried steel plate according to the present invention.
Fig. 6 is a top view of the arc-shaped pre-buried steel plate of the present invention.
FIG. 7 is a schematic diagram of the positional relationship between the arc-shaped pre-buried steel plate and the tower foundation connection part according to the present invention.
Fig. 8 is a state diagram of the present invention when adjacent tower foundation prefabrication units are clamped by the hydraulic clamping device.
Fig. 9 is an enlarged view at a of fig. 8.
Fig. 10 is a schematic structural view of the hydraulic clamping device of the present invention.
Fig. 11 is a flow chart of the method of the present invention.
Reference numerals illustrate:
1-a tower foundation connecting part; 2-tower foundation supporting part, 201-right trapezoid side plate;
202-arc end plates, 203-first transverse stiffeners, 204-second transverse stiffeners;
3-stirrup, 4-stirrup clamping groove and 5-connecting steel bar;
6-semicircular holes, 7-arc steel bars and 8-arc embedded steel plates;
9, an anchor bar hook, 10, a steel bar inserting channel and 11, a water draining hole;
12-steel strands, 13-a first steel strand perforation group and 14-a second steel strand perforation group;
15-a main body frame, 16-a movable frame and 17-a hydraulic cylinder;
18-limited blocks and 19-C-shaped ribs.
Detailed Description
As shown in fig. 1 to 7, the invention and the embodiment of the invention provide an assembled prefabricated wind power tower foundation, which comprises a plurality of tower foundation prefabrication units with sector-shaped cross sections, wherein the tower foundation prefabrication units are sequentially spliced to form an assembled prefabricated wind power tower foundation with annular cross sections;
Each tower barrel foundation prefabrication unit comprises a tower barrel foundation connection part 1 serving as a fan-shaped inner arc and a tower barrel foundation support part 2 connected with the tower barrel foundation connection part 1, wherein a plurality of tower barrel foundation connection parts 1 are hooped together through hoops 3 to form a hollow barrel-shaped structure, a circular column for tower barrel connection is formed after column reinforcement is bound and concrete is poured in the barrel-shaped structure, the tower barrel foundation support part 2 is of a frame structure, the splicing side of each tower barrel foundation connection part 1 is provided with a semicircular hole 6 for embedding a connection reinforcement 5, a plurality of arc reinforcement bars 7 are arranged in each semicircular hole 6 from top to bottom, one side, far away from the tower barrel foundation support part 2, of each tower barrel foundation connection part 1 is provided with an arc-shaped pre-buried steel plate 8, each arc-buried steel plate 8 is anchored on the surface of the tower barrel foundation connection part 1 through an anchor bar hook 9, two adjacent arc-shaped pre-buried steel plates 8 are welded, and each two adjacent tower barrel foundation support parts 2 are fixed by a steel strand 12;
The tower foundation connecting portion 1 is higher than the tower foundation supporting portion 2 and is arranged, and the top of the tower foundation supporting portion 2 gradually inclines downwards from one end close to the tower foundation connecting portion 1 to one end far away from the tower foundation connecting portion 1.
When in actual use, the plurality of fan-shaped tower foundation prefabrication units are spliced in sequence to form the annular wind power tower foundation, so that the factory prefabrication of the tower foundation prefabrication units can be realized, and the construction efficiency can be effectively improved.
It should be noted that, through setting up tower section of thick bamboo foundation supporting part 2 as frame construction, can effectively reduce redundant packing of material, compare solid structure and lighten the dead weight by a wide margin, reduce transportation and hoist and mount degree of difficulty, save the cost.
During concrete implementation, the arc-shaped embedded steel plates 8 are arranged on one side, far away from the tower barrel foundation supporting part 2, of the tower barrel foundation connecting part 1 through the anchor bar hooks 9, so that the arc-shaped embedded steel plates 8 of the plurality of tower barrel foundation prefabrication units are welded to form a barrel-shaped structure, the effect of connecting the plurality of tower barrel foundation prefabrication units can be achieved, the concrete-molding circular table post can be used as a template, and concrete-molding circular table posts are cast in the barrel-shaped structure.
In addition, through all being provided with the semicircular hole 6 that supplies connecting reinforcement 5 to bury in the concatenation side of every tower section of thick bamboo foundation connecting portion 1, every semicircular hole 6 is interior from top to bottom all to be provided with a plurality of arc reinforcing bars 7, can connect two adjacent tower section of thick bamboo foundation connecting portion 1 through connecting reinforcement 5 and arc reinforcing bar 7, further strengthen the joint strength of node, improve overall structure's stability.
It should be noted that, the steel stranded wires 12 are used for fixing the adjacent two tower barrel foundation supporting parts 2 by means of the drawknot, the steel stranded wires 12 have high strength and good flexibility, so that the steel stranded wires 12 can uniformly disperse tensile force and avoid stress concentration, the integrity and stability of the whole wind power tower barrel foundation are effectively enhanced, and the wind power tower barrel foundation can be integrally detached during disassembly, so that quick assembly and disassembly are realized, and meanwhile, the wind power tower barrel foundation can be repeatedly utilized.
In the concrete implementation, two anchor bar hooks 9 are symmetrically arranged on the arc-shaped embedded steel plate 8, and the anchor bar hooks 9 are anchored in the tower foundation connecting part 1.
As shown in fig. 5 and 6, in the concrete implementation, the connecting steel bar 5 is used for realizing connection between the tower and the wind power tower foundation, and a plurality of C-shaped ribs 19 are sequentially fixed from top to bottom on one side, far away from the tower foundation connecting portion 1, of the arc-shaped embedded steel plate 8, and the anchor rib hooks 9 and the C-shaped ribs 19 can connect the arc-shaped embedded steel plate 8 with concrete structures on two sides of the arc-shaped embedded steel plate 8.
As shown in fig. 3, in this embodiment, a stirrup clamping groove 4 for clamping stirrups is provided on an outer arc surface extending from the tower foundation connection part 1 to the upper part of the tower foundation support part 2.
As shown in fig. 8 and 9, in this embodiment, the arc-shaped reinforcing bars 7 between two adjacent tower foundation connection parts 1 are staggered up and down and form a reinforcing bar inserting channel 10 for inserting the connecting reinforcing bars 5;
The connecting steel bars 5 are buried in the semicircular holes 6 through concrete and are positioned in the steel bar inserting channels 10.
When in actual use, the connecting steel bars 5 are distributed along the height direction of the wind power tower foundation, and after the connecting steel bars 5 are inserted into the steel bar inserting channel, the connecting strength between the two adjacent tower foundation connecting parts 1 can be effectively increased due to the action of the connecting steel bars 5.
In the concrete implementation, the concave cambered surfaces of the arc-shaped steel bars 7 are distributed towards the hole walls of the semicircular holes 6, and the arc-shaped steel bars 7 on the splicing sides of the adjacent tower foundation connecting parts 1 are distributed in an up-and-down staggered mode.
In this embodiment, the tower foundation connection portion 1 and the tower foundation support portion 2 are reinforced concrete members and are integrally formed.
As shown in fig. 3, in this embodiment, the tower foundation supporting portion 2 includes two right trapezoid side plates 201 symmetrically connected to two sides of the tower foundation connecting portion 1, one end, far away from the tower foundation connecting portion 1, of the two right trapezoid side plates 201 is connected with an arc-shaped end plate 202, and a first transverse stiffening rib 203 and a second transverse stiffening rib 204 are further connected between the two right trapezoid side plates 201.
In actual use, the right trapezoid side plates 201, the arc-shaped end plates 202, the first transverse stiffening ribs 203 and the second transverse stiffening ribs 204 form a stable geometric structure, the overall rigidity of the small foundation is improved, deformation under the action of horizontal loads such as wind power is resisted, and structural stability is guaranteed.
In particular, the right trapezoid side plates 201, the arc-shaped end plates 202, the first transverse stiffener 203 and the second transverse stiffener 204 are integrally formed.
In this embodiment, two drain holes 11 are reserved on the arc-shaped end plate 202.
In actual use, two drain holes 11 are reserved on the arc-shaped end plate 202, so that not only can the drain effect be achieved, but also the weight can be reduced.
As shown in fig. 4, in this embodiment, a first steel strand perforation set 13 and a second steel strand perforation set 14 are reserved on the right trapezoid side plate 201, the first steel strand perforation set is disposed close to the tower foundation connection portion 1, and the second steel strand perforation set is disposed close to the arc-shaped end plate 202;
The plurality of steel strand perforations in the first steel strand perforation group are distributed in a hexagonal star shape, and the plurality of steel strand perforations in the second steel strand perforation group are distributed in a triangular shape.
Meanwhile, as shown in fig. 8 to 11, the invention and the embodiment of the invention also provide a construction method of an assembled prefabricated wind power tower foundation, which comprises the following steps:
determining the number of prefabricated units of the tower foundation according to the design size of the prefabricated wind power tower foundation and transportation and hoisting conditions;
Step two, prefabricating a tower foundation prefabricating unit in a factory;
step three, conveying the prefabricated tower foundation prefabricated units to a construction site;
positioning the positions of a plurality of tower foundation prefabrication units in a construction site;
step five, splicing tower foundation by means of steel strands, namely hoisting and fixing the plurality of tower foundation prefabricated units in place according to the positions of the plurality of positioned tower foundation prefabricated units in sequence, hooping the plurality of tower foundation connecting parts 1 together through hoops 3 after all the tower foundation prefabricated units are hoisted and fixed in place, and enclosing the plurality of tower foundation connecting parts 1 into a circular table post with a cavity in the middle;
Wherein, after the prefabricated unit of a next tower section of thick bamboo foundation is hoisted in place, be connected the prefabricated unit of a next tower section of thick bamboo foundation with the prefabricated unit of a previous tower section of thick bamboo foundation, through following mode:
the adjacent tower foundation prefabricated units are tied through the steel strands 12;
Welding arc-shaped pre-buried steel plates 8 at the front ends of adjacent tower foundation prefabrication units;
Step six, pouring concrete, namely inserting a connecting steel bar 5 into round holes formed by every two semicircular holes 6, pouring concrete, and binding column steel bars in the hollow cavity of the circular column and pouring concrete;
when the column steel bars are bound in the cavity of the circular column, the main steel bars of the column steel bars pass through the channel formed between the C-shaped steel bars 19 and the arc-shaped embedded steel plates 8, so that the connection between the cast-in-situ circular column and the assembled prefabricated wind power tower foundation can be realized.
In this embodiment, before the adjacent tower foundation prefabricated units are tied by the steel strands 12, the adjacent tower foundation prefabricated units are clamped by the hydraulic clamping device.
When in actual use, when adjacent tower foundation prefabricating units are clamped through the hydraulic clamping device, right trapezoid side plates 201 close to the adjacent tower foundation prefabricating units are clamped, and gaps between the adjacent tower foundation prefabricating units are prevented from being too large.
As shown in fig. 10, in this embodiment, the hydraulic clamping device includes a main body frame 15 and two movable frames 16 respectively hinged at two ends of the main body frame 15, two hydraulic cylinders 17 respectively hinged on the main body frame 15 and respectively used for driving the two movable frames 16 to swing, a plurality of limiting blocks 18 are respectively provided at two bottoms of the main body frame 15 and at the bottom of the movable frames 16, and the limiting blocks 18 at the end of the main body frame 15 and the limiting blocks 18 at the bottom of the movable frames 16 cooperate to clamp the side plates close to each other in the adjacent tower foundation prefabrication unit.
In actual use, main body frame 15 includes trapezoidal frame, the first transverse connection pole of setting in the middle of trapezoidal frame to and set up the vertical pole in the middle upper portion of first transverse connection pole perpendicularly, two hydraulic cylinder 17's cylinder body articulates respectively installs the both sides of vertical pole, two hydraulic cylinder 17's piston end articulates respectively on two movable frames 16.
It should be noted that the movable frame 16 includes two movable rods respectively connected to two sides of the end of the main body frame 15, and a second transverse connecting rod connected between one ends of the two movable rods far away from the main body frame 15, and the piston end of the hydraulic cylinder 17 is hinged at the middle of the second transverse connecting rod.
In specific implementation, the limiting block 18 is an L-shaped limiting block.
In a specific construction, the following method is adopted:
(1) Wind power tower foundation splitting design:
And (5) reasonably determining the size and the weight of the tower foundation prefabricated unit according to the transportation and hoisting conditions. The problems that the prefabricated units of the tower foundation are too large and heavy to cause difficult transportation and hoisting and too small to cause too large assembling workload are avoided. The wind power tower foundation is split into a plurality of tower foundation prefabricated units, and the wind load, the dead weight of the tower and other working conditions are considered, so that the safety of the whole structure is not influenced by the splitting. Each tower foundation prefabrication unit adopts a lattice framework structure to form a geometric stable grid, a hollow area is arranged inside the grid, redundant filling materials are reduced, and dead weight is reduced.
(2) Prefabrication in a factory:
when in construction, each tower foundation prefabrication unit is prefabricated in a factory, so that the construction efficiency can be greatly improved, the transportation and construction are more convenient, the cost is saved, and the prefabrication process comprises template customization, reinforcement arrangement, connection piece embedding, concrete pouring and maintenance.
And (3) template customization, namely designing a customized template according to the design size of the tower foundation prefabrication unit. The template adopts a steel template, and has enough strength, rigidity and stability. The size of each part of the template is precisely controlled, and the template precision is higher than that of a finished component.
And (3) reinforcing steel bar arrangement, namely reinforcing steel bar binding is carried out in the template, reinforcing steel bars are respectively arranged on the right trapezoid side plate 201, the arc-shaped end plate 202, the first transverse stiffening rib 203 and the second transverse stiffening rib 204, the anchoring length and the connecting quality of the reinforcing steel bars are ensured at the joint, and the reinforcing steel bars are firmly connected in a welding mode, so that a stable reinforcing steel bar framework is formed.
And (3) concrete pouring, namely selecting concrete with proper strength grade, and adopting a layered pouring mode to ensure that the concrete is compact. In the pouring process, the pouring speed and the pouring height are controlled, and the overlarge lateral pressure of the concrete on the template is prevented.
And curing, namely performing steam curing in time after concrete pouring is completed, so as to ensure the normal increase of the concrete strength.
(3) And (3) on-site assembly:
After the maintenance reaches the design strength, the concrete is transported to the site for assembly, including site preparation, hoisting in place, assembly type construction, node treatment and concrete pouring.
Site preparation, namely flattening and compacting a foundation installation area on a construction site to ensure that the weight of a tower foundation prefabrication unit and subsequent construction equipment can be borne. And accurately measuring and marking the installation position of each tower foundation prefabrication unit, and setting a positioning control line.
Hoisting in place, namely hoisting the tower foundation prefabricated units one by one and installing the prefabricated units to a designated position by adopting hoisting equipment with proper tonnage according to a pre-planned hoisting sequence. After each tower foundation prefabrication unit is in place, fixing is carried out through a temporary supporting device, and levelness and verticality of the tower foundation prefabrication unit are adjusted so that deviation of the tower foundation prefabrication unit is controlled within a design allowable range.
After any tower foundation prefabrication unit except the first tower foundation prefabrication unit is hoisted in place, a hydraulic clamping device is placed on the adjacent installed tower foundation prefabrication units, the center position of a main body frame 15 is overlapped with the center position of a second transverse stiffening rib 204 of the tower foundation prefabrication unit, four limiting blocks 18 on the main body frame 15 are clamped into four corners of the second transverse stiffening rib 204, two movable frames 16 are respectively driven to rotate through two hydraulic cylinders 17, when the two movable frames 16 are respectively clamped on the adjacent tower foundation prefabrication units in a fitting mode, the hydraulic cylinders 17 are controlled to stop, accurate positioning is completed at the moment, manual alignment by an installer is not needed, and the position correction efficiency of the tower foundation prefabrication units is improved.
It should be noted that, when the two movable frames 16 are respectively attached to and clamped on the adjacent tower foundation prefabricating units, the two limiting blocks 18 at the bottom of the movable frame 16 are respectively clamped at two corners formed by the second transverse stiffening ribs 204 and the right trapezoid side plates 201 of the corresponding tower foundation prefabricating units.
When the adjacent tower foundation prefabrication units are tied through the steel strands 12, the steel strands 12 sequentially penetrate through preset preformed holes of the adjacent tower foundation prefabrication units from the initial tower foundation prefabrication units according to a drawing mode, and a continuous and closed line quick-release system is formed in the whole foundation structure. In the state that the hydraulic clamping device is started, the steel stranded wires 12 are in a tensioning state, adjacent tower foundation prefabrication units are guaranteed to be tightly connected together, required connection strength and stability standards are achieved, and safe operation of the wind power tower foundation under various complex working conditions is guaranteed. And then the installation and connection of the subsequent tower foundation prefabricated units are sequentially carried out, so that a plurality of tower foundation prefabricated units are connected into an integral structure through a quick-dismantling system.
Node connection, namely splicing and combining are carried out through the connecting steel bars 5 and the arc-shaped steel bars 7, so that the stability and the reliability of the whole structure are ensured, and the foundation construction is efficiently completed. The prefabricated units of the tower foundation can cooperatively work after being assembled to bear the load transferred by the upper structure.
And (3) pouring concrete, namely after the assembly is completed, pouring concrete in the middle circular cavity formed by the prefabricated units of the foundation of each tower barrel and the circular holes formed by every two semicircular holes 6.
And (3) removing the steel stranded wires, namely removing the steel stranded wires 12 when turnover is needed and the strength of the concrete meets the design requirement.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any simple modification, variation and equivalent structural changes made to the above embodiment according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (10)
1. The prefabricated wind power tower foundation is characterized by comprising a plurality of tower foundation prefabricated units with sector-shaped cross sections, wherein the tower foundation prefabricated units are sequentially spliced to form an assembled prefabricated wind power tower foundation with annular cross sections;
Each tower barrel foundation prefabrication unit comprises a tower barrel foundation connection part (1) serving as a fan-shaped inner arc and a tower barrel foundation supporting part (2) connected with the tower barrel foundation connection part (1), wherein a plurality of tower barrel foundation connection parts (1) are hooped together through hoops (3) to form a hollow barrel-shaped structure, a circular column for tower barrel connection is formed after column reinforcement is bound in the barrel-shaped structure and concrete is poured, the tower barrel foundation supporting parts (2) are of a frame structure, semicircular holes (6) for connecting reinforcement bars (5) to be buried are formed in the splicing side of each tower barrel foundation connection part (1), a plurality of arc reinforcement bars (7) are arranged in each semicircular hole (6) from top to bottom, one side, far away from the tower barrel foundation supporting part (2), of each tower barrel foundation connection part (1) is provided with an arc embedded steel plate (8), each arc embedded steel plate (8) is anchored on the surface of each tower barrel foundation connection part (1) through an anchor hook (9), and two adjacent tower barrel foundation stranded wires (12) are fixed between each two adjacent tower barrel foundation stranded wires (12);
The tower cylinder foundation connecting portion (1) is higher than the tower cylinder foundation supporting portion (2) and is arranged, and the top of the tower cylinder foundation supporting portion (2) gradually inclines downwards from one end close to the tower cylinder foundation connecting portion (1) to one end far away from the tower cylinder foundation connecting portion (1).
2. The prefabricated wind power tower foundation according to claim 1, wherein the tower foundation connecting portion (1) extends to an outer arc surface above the tower foundation supporting portion (2) and is provided with a stirrup clamping groove (4) for clamping stirrups.
3. The prefabricated wind power tower foundation according to claim 1, wherein arc-shaped steel bars (7) between two adjacent tower foundation connecting parts (1) are arranged in an up-down staggered mode and form a steel bar inserting channel (10) for inserting connecting steel bars (5);
the connecting steel bars (5) are buried in the semicircular holes (6) through concrete and are positioned in the steel bar inserting channels (10).
4. The prefabricated wind power tower foundation according to claim 1, wherein the tower foundation connecting part (1) and the tower foundation supporting part (2) are reinforced concrete members and are integrally formed.
5. The prefabricated wind power tower foundation according to claim 1, wherein the tower foundation supporting portion (2) comprises two right trapezoid side plates (201) symmetrically connected to two sides of the tower foundation connecting portion (1), one end, away from the tower foundation connecting portion (1), of each right trapezoid side plate (201) is connected with an arc-shaped end plate (202), and a first transverse stiffening rib (203) and a second transverse stiffening rib (204) are further connected between the two right trapezoid side plates (201).
6. A prefabricated wind power tower foundation according to claim 5, wherein two drain holes (11) are reserved on the arc-shaped end plate (202).
7. The prefabricated wind power tower foundation according to claim 5, wherein a first steel strand perforation group (13) and a second steel strand perforation group (14) are reserved on the right trapezoid side plate (201), the first steel strand perforation group is arranged close to the tower foundation connecting part (1), and the second steel strand perforation group is arranged close to the arc-shaped end plate (202);
The plurality of steel strand perforations in the first steel strand perforation group are distributed in a hexagonal star shape, and the plurality of steel strand perforations in the second steel strand perforation group are distributed in a triangular shape.
8. A method of constructing an assembled prefabricated wind power tower foundation according to claim 1, comprising the steps of:
determining the number of prefabricated units of the tower foundation according to the design size of the prefabricated wind power tower foundation and transportation and hoisting conditions;
Step two, prefabricating a tower foundation prefabricating unit in a factory;
step three, conveying the prefabricated tower foundation prefabricated units to a construction site;
positioning the positions of a plurality of tower foundation prefabrication units in a construction site;
Step five, splicing tower foundation by means of steel strands, namely hoisting and fixing the plurality of tower foundation prefabricated units in place according to the positions of the plurality of positioned tower foundation prefabricated units in sequence, and hooping a plurality of tower foundation connecting parts (1) together through hoops (3) after all the tower foundation prefabricated units are hoisted and fixed in place, wherein the plurality of tower foundation connecting parts (1) are surrounded into a circular table post with a cavity in the middle;
Wherein, after the prefabricated unit of a next tower section of thick bamboo foundation is hoisted in place, be connected the prefabricated unit of a next tower section of thick bamboo foundation with the prefabricated unit of a previous tower section of thick bamboo foundation, through following mode:
the adjacent tower foundation prefabricated units are tied through steel strands (12);
welding arc-shaped pre-buried steel plates (8) at the front ends of adjacent tower barrel foundation prefabrication units;
And step six, pouring concrete, namely inserting a connecting reinforcing steel bar (5) into round holes formed by every two semicircular holes (6) and pouring concrete, and binding the column reinforcing steel bars in the cavities of the circular columns and pouring concrete.
9. A construction method for prefabricated wind power tower foundation according to claim 8, wherein the adjacent tower foundation prefabricated units are clamped by the hydraulic clamping device before the adjacent tower foundation prefabricated units are tied by steel strands (12).
10. The construction method of the prefabricated wind power tower foundation according to claim 9, wherein the hydraulic clamping device comprises a main body frame (15) and two movable frames (16) hinged to two ends of the main body frame (15), two hydraulic cylinders (17) used for driving the two movable frames (16) to swing are hinged to the main body frame (15), a plurality of limiting blocks (18) are respectively arranged at the bottoms of two ends of the main body frame (15) and the bottoms of the movable frames (16), and the limiting blocks (18) at the end of the main body frame (15) and the limiting blocks (18) at the bottoms of the movable frames (16) are matched to clamp side plates close to each other in the prefabricated units of the prefabricated tower foundation.
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| CN120250706B (en) | 2025-08-12 |
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