CN114319417A

CN114319417A - Barrel-shaped assembled wind power tower barrel foundation and construction method thereof

Info

Publication number: CN114319417A
Application number: CN202210161638.8A
Authority: CN
Inventors: 白久林; 王瑞毅; 王宇航; 杨庆山
Original assignee: Chongqing University
Current assignee: Chongqing University
Priority date: 2022-02-22
Filing date: 2022-02-22
Publication date: 2022-04-12
Anticipated expiration: 2042-02-22
Also published as: CN114319417B

Abstract

The invention discloses a barrel-shaped assembled wind power tower barrel foundation and a construction method thereof, belonging to the technical field of wind power generation, and comprising a cast-in-place pillar for connecting a wind power tower barrel and a prefabricated bottom barrel arranged at the bottom of the cast-in-place pillar, wherein the bottom of the prefabricated bottom barrel is provided with an opening and is vertically inserted into a foundation; the prefabricated bottom barrel comprises a plurality of arc-shaped bottom barrel pieces, the arc-shaped bottom barrel pieces are sequentially spliced along the circumferential direction, and two adjacent arc-shaped bottom barrel pieces are connected through a connecting structure. The foundation cylinder body is in a circular shape formed by mutually assembling arc-shaped blocks, is suitable for foundations with more rocks, can improve the installation stability between the foundations and the foundation, and can also improve the bearing capacity of the tower cylinder foundation.

Description

Barrel-shaped assembled wind power tower barrel foundation and construction method thereof

Technical Field

The invention belongs to the technical field of wind power generation, and particularly relates to a bucket-shaped assembled wind power tower foundation and a construction method thereof.

Background

The wind motor tower barrel belongs to a high-rise structure and bears large horizontal and vertical loads, so that the foundation body is large. The general bottom of traditional wind power tower cylinder pile foundation is fixed through many pile foundations and ground, but is facing more and hard of foundation lower part ground rock, and when inconvenient imbeds the rock with the stake, it is comparatively inconvenient to adopt the pile foundation construction, leads to the bearing capacity and the stability of pile foundation relatively poor.

Disclosure of Invention

In view of the above, the present invention aims to provide a barrel-type assembled wind power tower barrel foundation and a construction method thereof, wherein a barrel body of the foundation is a circular shape formed by mutually assembling arc-shaped blocks, and is suitable for a foundation with an upper portion being a soil layer and a lower portion being a rock layer, and the lower portion of the foundation is hard, so that rocks are not easily embedded during pile foundation construction, and therefore, the installation stability between the foundation and the foundation can be improved, and the bearing capacity of the tower barrel foundation can also be improved.

In order to achieve the purpose, the invention provides the following technical scheme:

the invention discloses a barrel-shaped assembled wind power tower barrel foundation which comprises a cast-in-place pillar used for connecting a wind power tower barrel and a prefabricated bottom barrel arranged at the bottom of the cast-in-place pillar, wherein the bottom of the prefabricated bottom barrel is opened and is vertically inserted into a foundation; the prefabricated bottom barrel comprises a plurality of arc-shaped bottom barrel pieces, the arc-shaped bottom barrel pieces are sequentially spliced along the circumferential direction, and two adjacent arc-shaped bottom barrel pieces are connected through a connecting structure.

Further, slots are formed in the side faces of the arc-shaped bottom barrel pieces, the connecting structure comprises H-shaped section steel, and the two sides of the section steel are respectively connected with the slots of the two adjacent arc-shaped bottom barrel pieces in an inserting mode.

Furthermore, a cast-in-place bottom plate is arranged at the upper end of the prefabricated bottom barrel, and the upper end of each arc-shaped bottom barrel piece is fixed on the annular arc-shaped beam at the bottom of the cast-in-place bottom plate.

Further, a prefabricated conical ring is arranged at the center of the cast-in-place table column, a double-layer support ring is fixedly arranged at the bottom of the prefabricated conical ring, and an open slot is formed in the inner side of the support ring; prestressed anchor bolts are uniformly distributed in the cast-in-place sleeve column in an annular mode and are arranged on the outer side of the prefabricated conical ring, the lower section of each prestressed anchor bolt is anchored in an open slot of the support ring, a pre-buried bolt of the cast-in-place bottom plate is connected with the support ring on the inner side of the open slot, and a maintenance space communicated with the open slot is formed on the inner side of the prefabricated conical ring.

Further, prefabricated conical ring includes vertical straight section of thick bamboo section and conical cylinder section, the conical cylinder section is big-end-down, the upper end of conical cylinder section with vertical straight section of thick bamboo meets.

Furthermore, a plurality of stiffening ribs are uniformly distributed in the open slot along the circumferential direction of the open slot, a separation slot is formed between every two adjacent stiffening ribs and separates the space of the open slot, and the separation slot corresponds to the prestressed anchor bolt and the bottom plate embedded bolt one to one.

Further, a prefabricated arc beam is further arranged between the cast-in-place stand column and the prefabricated bottom barrel, the upper end of the prefabricated arc beam extends along the radial direction of the cast-in-place stand column and is connected to the cast-in-place stand column, a first connecting rib is pre-embedded in the upper end of the prefabricated arc beam, a second connecting rib is welded on the outer side of the prefabricated conical ring, and the first connecting rib and the second connecting rib are mutually overlapped.

Furthermore, every prefabricated arc roof beam supports through three prefabricated support column along roof beam length direction lower part, the upper and lower both ends of prefabricated support column link to each other with prefabricated arc roof beam and prefabricated bottom bucket respectively, the height of support column is along radially lengthening in proper order from outside to inside, and the radial bottom radial arrangement of reinforcement in support column place is encrypted, forms the hidden beam in order to guarantee the stability of support column and upper portion arc roof beam.

Further, a sleeve is pre-embedded in the lower portion of the inner side of the supporting column, the upper end of the sleeve is connected with a third connecting rib, the third connecting rib extends upwards and then is connected with the prefabricated arc-shaped beam, a fourth connecting rib extends upwards from the top of the prefabricated bottom barrel, and the fourth connecting rib is connected with the lower end of the sleeve in a sleeve extrusion mode; and a mounting hole is formed in the prefabricated arc-shaped beam, a metal corrugated pipe is pre-buried in the mounting hole, and after the third connecting rib extends upwards through the metal corrugated pipe, concrete is cast in situ in a cavity between the metal corrugated pipe and the third connecting rib.

A construction method of a barrel-shaped assembled wind power tower barrel foundation comprises the steps of firstly, sequentially horizontally installing a plurality of barrel pieces with arc bottoms along the circumferential direction to form a barrel shape, arranging embedded parts of bottom plates at the upper ends of the barrel pieces with the arc bottoms, then, casting a bottom plate in situ, fixing prefabricated conical rings at the center of the cast-in-situ bottom plate through bottom plate embedded bolts, constructing prefabricated support columns on the cast-in-situ bottom plate, constructing prefabricated arc-shaped beams among the prefabricated support columns, the prefabricated conical rings and the cast-in-situ bottom plate, and finally, constructing cast-in-situ table columns after supporting templates outside the conical rings.

The invention has the beneficial effects that:

1. the invention discloses a barrel-type assembled wind power tower barrel foundation, which comprises a cast-in-place pillar for connecting a wind power tower barrel and a prefabricated bottom barrel arranged at the bottom of the cast-in-place pillar, wherein the whole tower barrel foundation is inserted into a rock foundation through the prefabricated bottom barrel, so that a rock stratum can be more conveniently arranged at the upper part and the lower part of a soil layer, the rock is hard, and the pile foundation is not easily embedded into the rock foundation during construction. Compare in current pile foundation, prefabricated under bucket lower part and the bigger area of contact between the ground have increased the area of contact between basic barrel and the soil layer in order to increase the friction, improve the construction of basic barrel and the stability of follow-up work.

2. According to the barrel-type assembled wind power tower barrel foundation disclosed by the invention, the prefabricated bottom barrel comprises the plurality of arc-shaped bottom barrel pieces which are sequentially spliced along the circumferential direction of the arc-shaped bottom barrel pieces, two adjacent arc-shaped bottom barrel pieces are connected through the connecting structure, and the prefabricated bottom barrel pieces are directly prefabricated through a factory through an assembled connecting mode, so that the construction efficiency can be greatly improved, the transportation and the construction are more convenient, and the cost is saved.

3. According to the barrel-shaped assembled wind power tower barrel foundation disclosed by the invention, the prefabricated conical ring arranged at the center of the cast-in-place table post is matched with the double-layer support ring fixedly arranged at the bottom of the prefabricated conical ring, so that maintenance personnel can conveniently enter the wind power tower barrel foundation to perform maintenance operation; maintenance personnel can get into in the prefabricated taper ring through the upper end of prefabricated taper ring, and the prestressing force anchor bolt is carried out the elasticity, is convenient for pull out the change or fasten after the prestressing force anchor bolt damages or prestressing force loss is too big, and the maintenance of prestressing force anchor bolt is convenient and fast more.

Additional advantages, objects, and features of the invention will be set forth in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.

Drawings

In order to make the object, technical scheme and beneficial effect of the invention more clear, the invention provides the following drawings for explanation:

FIG. 1 is a schematic structural view of a bucket type fabricated wind tower foundation of the present invention;

FIG. 2 is a schematic view of the structure of the bucket plate with an arc-shaped bottom shown in FIG. 1 according to the present invention;

FIG. 3 is an enlarged view of FIG. 2 at A in accordance with the present invention;

FIG. 4 is a semi-sectional view of a bucket type fabricated wind tower foundation of the present invention;

FIG. 5 is a schematic structural view of the prefabricated cone ring of FIG. 1 according to the present invention;

FIG. 6 is a schematic view of the connection of the prefabricated arc beam and the prefabricated support column of FIG. 1 according to the present invention;

fig. 7 is a schematic view of the attachment of the lower end of the prefabricated arc beam of the present invention to a prefabricated bottom bucket piece.

The drawings are numbered as follows: the cast-in-place device comprises a cast-in-place table post 1, a prefabricated bottom barrel 2, an arc bottom barrel piece 3, a connecting structure 4, an inserting groove 5, a cast-in-place bottom plate 6, a prefabricated conical ring 7, a supporting ring 8, an open groove 9, a prestressed anchor bolt 10, a vertical straight barrel section 11, a conical barrel section 12, a stiffening rib 13, a prefabricated arc beam 14, a first connecting rib 15, a second connecting rib 16, a prefabricated supporting column 17, a sleeve 18, a third connecting rib 19, a fourth connecting rib 20 and a metal corrugated pipe 21.

Detailed Description

As shown in fig. 1, the bucket-type assembled wind power tower foundation of the invention comprises a cast-in-place pillar 1 for connecting a wind power tower and a prefabricated bottom bucket 2 arranged at the bottom of the cast-in-place pillar 1, wherein the cast-in-place pillar 1 is cylindrical, the bottom of the prefabricated bottom bucket 2 is open, and the lower end of the prefabricated bottom bucket 2 is inserted into a rock foundation along the vertical direction; whole tower section of thick bamboo basis is through prefabricated end bucket 2 insert rock foundation in, with 2 bottoms of prefabricated end bucket on as to the rock, can not imbed among the rock when inconvenient imbedding the rock. Compare in current pile foundation, prefabricated end bucket 2 has bigger area of contact with between the foundation soil layer, has increased the friction between basic barrel and the soil layer, improves the installation stability of basic barrel. Prefabricated end bucket 2 includes a plurality of arc end bucket pieces 3, and each arc end bucket piece 3's structure is the same, splices in proper order along 3 circumference of arc end bucket piece and forms prefabricated end bucket 2, connects through connection structure 4 between two adjacent arc end bucket pieces 3, improves the efficiency of construction.

In this embodiment, as shown in fig. 2 and 3, a slot 5 has been seted up to the side of barrel piece 3 at the bottom of the arc, and slot 5 runs through barrel piece 3 at the bottom of the arc along vertical, and connection structure 4 includes the shaped steel of H type, and the both sides of shaped steel are pegged graft with slot 5 of barrel piece 3 at the bottom of two adjacent arcs respectively to link together barrel piece 3 at the bottom of two adjacent arcs. The prefabricated bottom barrel 2 further comprises a circular cast-in-place bottom plate 6 arranged at the bottom of the cast-in-place pillar 1, the cast-in-place bottom plate 6 is used for connecting and supporting the arc-shaped bottom barrel pieces 3, and the upper end of each arc-shaped bottom barrel piece 3 is fixed at the bottom of the cast-in-place bottom plate 6.

In this embodiment, as shown in fig. 4 and 5, a prefabricated conical ring 7 is arranged at the center of a cast-in-place table column 1, a double-layer support ring 8 is fixedly arranged at the bottom of the prefabricated conical ring 7, the height of the support ring 8 is 500mm, the height of the open slot is about 300mm, and an open slot 9 is formed in the inner side of the support ring 8, so that a maintenance worker can conveniently perform construction and later maintenance; prestressed anchor bolts 10 are annularly and uniformly distributed in the cast-in-place sleeve column, the prestressed anchor bolts 10 are arranged on the outer side of the prefabricated conical ring 7, the lower section of each prestressed anchor bolt 10 extends and is anchored in an open slot 9 of the support ring 8, the inner side of the open slot 9 is connected with a bolt pre-embedded in the cast-in-place bottom plate, a maintenance space communicated with the open slot 9 is formed in the inner side of the prefabricated conical ring 7, a maintenance worker can enter the prefabricated conical ring 7 through the upper end of the prefabricated conical ring 7 and then enter the support ring 8 through the open slot 9 to tighten or loosen the prestressed anchor bolts 10 penetrating into the support ring 8, and the prestressed anchor bolts 10 are convenient to pull out, replace or fasten.

In this embodiment, the prefabricated conical ring 7 includes a vertical straight cylinder section 11 and a conical cylinder section 12, the conical cylinder section 12 is large-sized in the upper part and small in the lower part, and the upper end of the conical cylinder section 12 is connected with the vertical straight cylinder section 11. Through setting up the less vertical straight section of thick bamboo section 11 of diameter, can guarantee cast-in-place bench 1's scale, slick and sly excessive between vertical straight section of thick bamboo section 11 and the conical cylinder section 12 can guarantee the bearing capacity of whole structure.

In this embodiment, a plurality of stiffening ribs 13 are uniformly distributed in the open slot 9 along the circumferential direction thereof, a separation slot is formed between two adjacent stiffening ribs 13 by separating the space of the open slot 9, the separation slot corresponds to the prestressed anchor bolt 10 one by one, and the stiffening ribs 13 are used for supporting the open slot 9, thereby improving the structural strength of the support ring 8.

In this embodiment, as shown in fig. 6, a prefabricated arc beam 14 is further disposed between the cast-in-place pillar 1 and the prefabricated bottom bucket 2, an upper end of the prefabricated arc beam 14 extends along a radial direction of the cast-in-place pillar 1 and is connected to the cast-in-place pillar 1, a first connecting rib 15 is embedded in the upper end of the prefabricated arc beam 14, a second connecting rib 16 is welded on an outer side of the prefabricated conical ring 7, and the first connecting rib 15 and the second connecting rib 16 are overlapped with each other. The lower part of the prefabricated arc beam 14 along the beam length direction is supported by three prefabricated support columns 17, the upper end and the lower end of each prefabricated support column 17 are respectively connected with the prefabricated arc beam 14 and the prefabricated bottom barrel 2, and the height of each support column is sequentially increased from outside to inside along the radial direction. The vertical bearing capacity of the whole device can be improved by arranging the prefabricated arc beam 14 and the prefabricated support columns 17, the prefabricated arc beam 14 extends along the radial direction of the cast-in-place column 1 and is connected to the cast-in-place column 1, the lower end parts of the prefabricated beams are embedded with the 5 th connecting ribs and connected with the prefabricated bottom barrel through the embedded sleeves at the upper ends of the middle parts, and the anti-overturning capacity of the structure is further improved.

In the embodiment, a sleeve 18 is embedded in the lower part of the inner side of the supporting column, the upper end of the sleeve 18 is connected with a third connecting rib 19, the third connecting rib 19 extends upwards and then is connected with the prefabricated arc beam 14, a fourth connecting rib 20 extends upwards from the top of the prefabricated bottom barrel 2, and the fourth connecting rib 20 is connected with the lower end of the sleeve 18; and a mounting hole is formed in the prefabricated arc beam 14, a metal corrugated pipe 21 is embedded in the mounting hole, and the third connecting rib 19 extends upwards and then is connected with the prefabricated arc beam 14 through the metal corrugated pipe 21.

Fig. 7 is a schematic diagram of the connection between the lower end of the prefabricated arc beam 14 and the prefabricated bottom barrel piece 3, a fifth connecting rib is pre-embedded and extended out of the lower end of the prefabricated arc beam 14 and connected with the prefabricated bottom barrel piece 3 through a sleeve pre-embedded at the upper end of the middle part, that is, the fifth connecting rib is inserted into a pre-embedded sleeve of the bottom barrel and connected through an extrusion sleeve, and the sleeve connection mode is the same as the connection mode of the support column and the bottom plate.

A construction method of a barrel-shaped assembled wind power tower barrel foundation comprises the steps of firstly, sequentially horizontally installing a plurality of barrel pieces 3 with arc bottoms in a cylindrical shape along the circumferential direction, reproducing a pouring bottom plate after arranging embedded parts of the bottom plate at the upper ends of the barrel pieces 3 with the arc bottoms, fixing a prefabricated conical ring 7 at the center of a cast-in-place bottom plate 6 through bolts, constructing prefabricated support columns 17 on the cast-in-place bottom plate 6, constructing prefabricated arc-shaped beams 14 among the prefabricated support columns 17, the prefabricated conical ring 7 and the cast-in-place bottom plate 6, and constructing a cast-in-place table column 1 after supporting a template on the outer sides of the conical rings.

Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a bucket type assembled wind power tower cylinder basis which characterized in that: the prefabricated bottom barrel is arranged at the bottom of the cast-in-place pillar, and the bottom of the prefabricated bottom barrel is opened and is vertically inserted into a foundation; the prefabricated bottom barrel comprises a plurality of arc-shaped bottom barrel pieces, the arc-shaped bottom barrel pieces are sequentially spliced along the circumferential direction, and two adjacent arc-shaped bottom barrel pieces are connected through a connecting structure.

2. The bucket-type assembled wind tower foundation of claim 1, wherein: the side of barrel piece has seted up the slot at the bottom of the arc, connection structure includes the shaped steel of H type, the both sides of shaped steel are pegged graft with the slot of two adjacent arc bottom barrel pieces respectively.

3. The bucket-type assembled wind tower foundation of claim 2, wherein: the upper end of the prefabricated bottom barrel is provided with a cast-in-place bottom plate, and the upper end of each arc-shaped bottom barrel piece is fixed on the annular arc-shaped beam at the bottom of the cast-in-place bottom plate.

4. The bucket-type assembled wind tower foundation of any one of claims 1-3, wherein: a prefabricated conical ring is arranged at the center of the cast-in-place table column, a double-layer support ring is fixedly arranged at the bottom of the prefabricated conical ring, and an open slot is formed in the inner side of the support ring; prestressed anchor bolts are uniformly distributed in the cast-in-place sleeve column in an annular mode and are arranged on the outer side of the prefabricated conical ring, the lower section of each prestressed anchor bolt is anchored in an open slot of the support ring, a pre-buried bolt of the cast-in-place bottom plate is connected with the support ring on the inner side of the open slot, and a maintenance space communicated with the open slot is formed on the inner side of the prefabricated conical ring.

5. The bucket-type assembled wind tower foundation of claim 4, wherein: the prefabricated conical ring comprises a vertical straight cylinder section and a conical cylinder section, the conical cylinder section is small in size from top to bottom, and the upper end of the conical cylinder section is connected with the vertical straight cylinder section.

6. The bucket-type assembled wind tower foundation of claim 5, wherein: and a plurality of stiffening ribs are uniformly distributed in the open slot along the circumferential direction of the open slot, a space of the open slot is separated between every two adjacent stiffening ribs to form a separation slot, and the separation slot corresponds to the prestressed anchor bolt and the bottom plate embedded bolt one to one.

7. The bucket-type assembled wind tower foundation of claim 6, wherein: the cast-in-place trolley comprises a cast-in-place trolley body, and is characterized in that a prefabricated arc beam is further arranged between the cast-in-place trolley body and the prefabricated bottom barrel, the upper end of the prefabricated arc beam extends along the radial direction of the cast-in-place trolley body and is connected to the cast-in-place trolley body, a first connecting rib is pre-embedded in the upper end of the prefabricated arc beam, a second connecting rib is welded on the outer side of the prefabricated conical ring, and the first connecting rib and the second connecting rib are mutually overlapped.

8. The bucket-type assembled wind tower foundation of claim 7, wherein: every prefabricated arc roof beam supports through three prefabricated support column along roof beam length direction lower part, the upper and lower both ends of prefabricated support column link to each other with prefabricated arc roof beam and prefabricated end bucket respectively, the height of support column is along radially lengthening in proper order from outside to inside, and the radial bottom of support column place is radial to be joined in marriage the muscle and is encrypted, forms the hidden beam in order to guarantee the stability of support column and upper portion arc roof beam.

9. The bucket-type assembled wind tower foundation of claim 8, wherein: a sleeve is embedded in the lower part of the inner side of the supporting column, the upper end of the sleeve is connected with a third connecting rib, the third connecting rib extends upwards and then is connected with the prefabricated arc-shaped beam, a fourth connecting rib extends upwards from the top of the prefabricated bottom barrel, and the fourth connecting rib is connected with the lower end of the sleeve in a sleeve extrusion mode; and a mounting hole is formed in the prefabricated arc-shaped beam, a metal corrugated pipe is pre-buried in the mounting hole, and after the third connecting rib extends upwards through the metal corrugated pipe, concrete is cast in situ in a cavity between the metal corrugated pipe and the third connecting rib.

10. A construction method of a barrel-shaped assembled wind power tower barrel foundation is characterized by comprising the following steps: the barrel-type assembled wind power tower barrel foundation of claim 9 is adopted, firstly, a plurality of arc-shaped bottom barrel pieces are sequentially horizontally installed along the circumferential direction to form a barrel shape, a bottom plate is cast in situ after embedded parts of the bottom plate are arranged at the upper ends of the arc-shaped bottom barrel pieces, a prefabricated conical ring is fixed at the center of the cast in situ bottom plate through a bottom plate embedded bolt, a prefabricated support column is constructed on the cast in situ bottom plate, a prefabricated arc-shaped beam is constructed among the prefabricated support column, the prefabricated conical ring and the cast in situ bottom plate, and finally, a cast in situ platform column is constructed after a template is supported at the outer side of the conical ring.