CN211898510U

CN211898510U - Multidirectional prestress prefabricated assembled beam slab foundation of wind power generation tower

Info

Publication number: CN211898510U
Application number: CN202020224092.2U
Authority: CN
Inventors: 马人乐; 孙永良
Original assignee: Architecture Design and Research Institute of Tongji University Group Co Ltd
Current assignee: Architecture Design and Research Institute of Tongji University Group Co Ltd
Priority date: 2020-02-27
Filing date: 2020-02-27
Publication date: 2020-11-10
Anticipated expiration: 2030-02-27

Abstract

The utility model relates to a prefabricated assembled beam slab basis of wind power generation tower multidirectional prestressing force, including last center foundation ring, lower center foundation ring and multi-disc assembled beam slab burst basis, go up center foundation ring and center foundation ring down and form a centre ring through the spelling crab-bolt concentric shaft connection who exerts prestressing force, multi-disc assembled beam slab burst basis is followed the centre ring hoop is arranged, and each assembled beam slab burst basis is connected with the centre ring through the basal top steel strand wires and the basal steel strand wires that exert prestressing force, and adjacent assembled beam slab burst basis is through the group bolted connection who exerts prestressing force. Compared with the prior art, the utility model has the advantages of the site operation time and the manual work of having reduced land wind power generation concrete tower basis improve the assembly rate on this basis and reduce the cost.

Description

Multidirectional prestress prefabricated assembled beam slab foundation of wind power generation tower

Technical Field

The utility model belongs to land wind power generation concrete tower basis design field especially relates to a prefabricated assembled beam slab basis of multidirectional prestressing force of wind power generation tower.

Background

At present, tower barrels of parts above the foundation of a land wind power generation concrete tower are mainly prefabricated sections in factories and transported to a site for hoisting, the site construction time is short, the labor consumption is low, the assembly efficiency is high, and the manufacturing cost is saved. However, the foundation mostly adopts a cast-in-place reinforced concrete foundation, an independent foundation is mostly adopted in a general foundation area, and a foundation form of a pile foundation and a bearing platform is mostly adopted in a soft soil foundation area. Cast-in-place basis is general one shot forming, and the crab-bolt is pre-buried in the basis, if because crab-bolt quality problems or construction problems lead to the crab-bolt to break, can have original design can not satisfy the structure safety problem completely, if will change the crab-bolt and need carry out a large amount of transformation reinforcement or abandonment to the basis. The reinforcement and the template support are very troublesome in the construction process of the existing bearing plate type foundation, the construction period is very long due to the concrete pouring time and the later maintenance time, and therefore the hoisting time of the fan is delayed, and the corresponding manufacturing cost is increased. In addition, the foundation needs to be maintained after the construction is finished, so that the construction time of the part of the foundation is long, much labor is consumed, the assembly is not realized, and the manufacturing cost is high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the defect that above-mentioned prior art exists and provide a prefabricated assembled beam slab basis of wind power generation tower multidirectional prestressing force to reduce onshore wind power generation concrete tower foundation's on-the-spot engineering time and manual work, improve basic assembly rate, reduce the cost.

The purpose of the utility model can be realized through the following technical scheme:

the utility model provides a prefabricated assembled beam slab basis of wind power generation tower multidirectional prestressing force, includes central foundation ring, lower central foundation ring and multi-disc assembled beam slab burst basis, go up central foundation ring and central foundation ring down and form a centre ring through the concentric hub connection of the spelling crab-bolt that is applied prestressing force, multi-disc assembled beam slab burst basis is followed centre ring hoop arranges, and each assembled beam slab burst basis is connected with the centre ring through the basic top steel strand wires and the basic steel strand wires that are applied prestressing force, and adjacent assembled beam slab burst basis is through the spelling bolted connection that is applied prestressing force.

Furthermore, a waterproof glue layer is coated on the contact surface of the upper central basic ring and the lower central basic ring.

Furthermore, leveling base plates and plain concrete cushion layers are arranged on the lower portions of the multi-piece assembled beam slab segmented foundation and the lower central foundation ring.

Further, the leveling base plate comprises a steel chisel, a leveling base plate top plate and a turn buckle, the leveling base plate top plate is fixed on the ground through the steel chisel and the turn buckle, and the leveling base plate top plate is flush with the plain concrete cushion layer in height.

Furthermore, the base top steel strand is connected with the upper center foundation ring, and the base steel strand is connected with the lower center foundation ring.

Furthermore, a vertical groove for grouting is formed in the contact part of the assembled beam slab split foundation and the center ring.

Furthermore, a plurality of grouting holes and a plurality of water drainage holes are formed in the assembled beam plate split foundation.

Furthermore, the upper center foundation ring is connected with a tower cylinder steel strand and a cylinder inner cover plate.

Furthermore, the prefabricated beam-slab segmented foundation pile structure further comprises piles arranged on the periphery of the multi-piece prefabricated beam-slab segmented foundation, and the piles are connected with the prefabricated beam-slab segmented foundation through hoop components.

Further, the hoop component comprises a plurality of hoops and pile holding bolts.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses carry out the piecemeal with original cast-in-place reinforced concrete basis, each subassembly all can make in the mill, processing and maintenance, and the job site only carries out the hoist and mount work and the prestressing force stretch-draw work of each subassembly, has reduced onshore wind power generation concrete tower foundation's site operation time and manual work, improves the assembly rate and the reduction cost of this basis.

2. The utility model discloses the piecemeal setting is gone up central basis ring and is gone up central basis ring, reduces the volume of each part in the transportation, makes the utility model discloses also be applicable to big specification fan.

3. The utility model discloses a central foundation ring will be gone up with center foundation ring down to the spelling crab-bolt and certain pretension is applyed to the spelling crab-bolt, is in the state that compresses tightly all the time between center foundation ring and the lower center foundation ring on making, resists tower section of thick bamboo steel strand wires's pulling force.

4. The utility model discloses a basic top steel strand wires and basement steel strand wires will be assembled beam slab burst basis and go up central basic ring and central basic ring down and be connected and exert certain pretension to basic top steel strand wires and basement steel strand wires, make assembled beam slab burst basis and last central basic ring and be in the state that compresses tightly all the time down between the central basic ring, make whole basis become the effort that wholly resists basic top surface. When the wind turbine specification is larger and the foundation size is larger, the prestress greatly improves the anti-cracking effect and the anti-fatigue bearing capacity of the foundation beam.

5. The utility model discloses an assembly bolt is with each piece of assembled beam slab burst foundation connection, and exerts certain pretension force to the assembly bolt, makes to be in the state that compresses tightly all the time between each assembled beam slab burst foundation, makes each piece of assembled beam slab burst foundation form wholly.

6. The utility model discloses whether set up the stake according to the geological conditions decision, enlarge basic application scope.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a cross-section A-A of FIG. 1;

FIG. 3 is a cross-section B-B of FIG. 1;

FIG. 4 is a view of a leveling pad;

FIG. 5 is a connection diagram of the segmented foundations of each fabricated beam slab with the upper central foundation ring and the lower central foundation ring;

wherein: 1 is an upper central basic ring; 2 is a lower central basic ring; 3, an assembled beam slab separation foundation; 4 is a splicing anchor bolt; 5 is a basic top steel strand; 6 is a base steel strand; 7 is a splicing bolt; 8 is a leveling base plate; 9 is a pile; 10 is a hoop; 11 is a pile-embracing bolt; 12 is a lower anchor plate of a splicing anchor bolt; 13 is an anchor plate on the assembly anchor bolt; 14 is a grouting hole; 15 is a water drainage hole; 16 is a tower cylinder steel strand; 17 is a cover plate in the cylinder; 18 is an upper assembled tower drum; 19 is a steel chisel; 20 is a leveling base plate top plate; 21 is a turn buckle; 22 is a cement glue waterproof layer; 23 is a vertical groove; 24 is a waterproof glue layer; 25 is a plain concrete cushion.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

As shown in fig. 1-2, the present embodiment provides a prefabricated assembly type beam slab foundation with multidirectional prestress for a wind power generation tower, including an upper center foundation ring 1, a lower center foundation ring 2, and a plurality of assembly type beam slab segment foundations 3, where the upper center foundation ring 1 and the lower center foundation ring 2 are connected by concentric shafts of assembling anchor bolts 4 to which prestress is applied to form a center ring, the plurality of assembly type beam slab segment foundations 3 are circumferentially arranged along the center ring, each assembly type beam slab segment foundation 3 is connected with the center ring by a base top steel strand 5 and a base strand 6 to which prestress is applied, and adjacent assembly type beam slab foundations 3 are connected by a plurality of assembling bolts 7 to which prestress is applied.

The upper central foundation ring 1 and the lower central foundation ring 2 are connected by short-line construction, and the contact surface is coated with a waterproof glue layer 24. An upper anchor plate 13 of the assembly anchor bolt is arranged between the upper part of the assembly anchor bolt 4 and the upper part of the upper central foundation ring 1, and a lower anchor plate 12 of the assembly anchor bolt is arranged between the lower part of the assembly anchor bolt 4 and the lower part of the lower central foundation ring 2. The upper central base ring 1 is internally provided with an inner cover plate 17. The upper central foundation ring 1 is also connected with a tower tube steel strand 16, and tensioning is carried out after an upper assembled tower tube 18 is installed in place.

The base top steel strand 5 and the base steel strand 6 are both provided with a plurality of steel strands, the base top steel strand 5 is connected with the upper center foundation ring 1, and the base steel strand 6 is connected with the lower center foundation ring 2.

As shown in fig. 3, the assembled beam slab segmented foundation 3 is provided with a plurality of grouting holes 14 and a plurality of drainage holes 15. The grouting holes 14 are communicated from the top surface to the bottom surface of the assembled beam-slab segmented foundation, and when holes are found in the bottom of each assembled beam-slab segmented foundation after the foundation is fixed in place, grouting can be performed to fill the holes. The water drainage hole 15 is arranged on the side edge of the assembled beam slab separation foundation.

The lower parts of the sub-piece foundation 3 and the lower central foundation ring 2 of each piece of the assembled beam slab are provided with a leveling base plate 8 and a plain concrete cushion layer 25. As shown in fig. 4, the leveling cushion plate 8 comprises steel rods 19, a leveling cushion plate top plate 20 and basket bolts 21, the leveling cushion plate top plate 20 is fixed on the ground through the steel rods 19 and the basket bolts 21, the leveling cushion plate top plate 20 is flush with the plain concrete cushion layer 25 in height, and the upper surfaces of the leveling cushion plate 8 and the plain concrete cushion layer 25 are provided with a cement glue waterproof layer 22. Before the plain concrete cushion layer 25 is poured on the construction site, the top surface elevations of all the leveling base plates 8 need to be adjusted to the elevations required by the design.

As shown in fig. 5, a vertical groove 23 for grouting is formed in a contact portion between the assembled beam slab segmented foundation 3 and the center ring, and grouting is performed after the assembled beam slab segmented foundation 3 is in close contact with the upper center foundation ring 1 and the lower center foundation ring 2.

In another embodiment, the beam-slab foundation further comprises piles 9 arranged on the periphery of the multi-piece assembled beam-slab segmented foundation 3, and the piles 9 are connected with the assembled beam-slab segmented foundation 3 through hoop components, so that the assembled beam-slab segmented foundation 3 and the piles 9 are integrated. The hoop assembly comprises a plurality of hoops 10 and pile bolts 11. The pile is suitable for the condition that the bearing capacity of the soil layer is lower in a soft soil area.

The multidirectional prestress prefabricated assembled beam slab foundation of the wind power generation tower is suitable for geological conditions of general foundation soil and foundation soil in soft soil areas, and the construction process comprises the following specific steps:

a. and (4) exploring the geological condition of each point position of the wind power generation tower and determining whether a pile foundation is needed or not.

b. Prefabricated parts such as the upper center foundation ring, the lower center foundation ring, the assembled beam plate split foundation, the cylinder inner cover plate and other components are manufactured, processed and maintained in a factory.

c. Excavating a foundation pit, leveling a substrate, fixing an anchor plate and a leveling base plate under the assembly anchor bolts, pouring a plain concrete cushion layer, leveling the surface of the plain concrete cushion layer, and brushing a cement glue waterproof layer.

d. Hanging the lower central foundation ring and leveling, and brushing waterproof glue on the lower central foundation ring; and hanging the upper central foundation ring to be aligned with the hole sites of the assembly anchor bolts.

e. And fixing an anchor plate on the assembly anchor bolt, penetrating the assembly anchor bolt and tensioning to a specified pre-tension value to enable the lower central foundation ring and the upper central foundation ring to be integrated.

f. And penetrating a base top steel strand and a base steel strand into the split foundations of the assembled beam slabs.

g. Temporary guide lines are inserted into the lower central basic ring and the upper central basic ring.

h. Each assembled beam slab is hoisted in place by the split foundation, and the inner end of the split foundation is away from the lower central foundation ring and the upper central foundation ring by a certain distance.

i. And connecting the inner ends of the base top steel strand and the base steel strand in the assembled beam slab segmented foundation with temporary guide lines led out from the upper central foundation ring and the lower central foundation ring.

j. And (3) positioning the assembled beam slab split foundations, and pulling the temporary guide lines to expose the base top steel stranded wires and the base steel stranded wires on the inner sides of the upper central foundation ring and the lower central foundation ring.

k. And penetrating assembling bolts among the assembled beam slab segmented foundations and tensioning to a specified pre-tensioning value to enable the assembled beam slab segmented foundations to be connected in an annular mode.

And l, symmetrically tensioning the base top steel strand and the base steel strand to a specified pre-tensioning value, so that the assembled beam slab split foundations, the upper central foundation ring and the lower central foundation ring are integrated.

And m, knocking the bottom plate to check whether a hole exists at the lower part, and grouting and maintaining the position with the hole.

And n, grouting and maintaining in the vertical grooves of the assembled beam slab segmented foundations, which are in contact with the upper central foundation ring and the lower central foundation ring.

And o, if pile driving is needed, driving the piles to the designed elevation, and connecting the piles with the assembled beam slab segmented foundations by adopting the anchor ears and the pile holding bolts.

And p, compacting backfilled soil.

And q, hoisting the upper assembled tower drum, penetrating a tower drum steel strand into the upper central foundation ring, and tensioning to a specified pretension value.

And r, covering the inner cover plate of the barrel after the pipelines of the related equipment and the like are installed.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by logical analysis, reasoning or limited experiments on the basis of the prior art by the concept of the present invention should be within the protection scope determined by the present invention.

Claims

1. The utility model provides a prefabricated assembled beam slab basis of wind power generation tower multidirectional prestressing force which characterized in that, includes central foundation ring (1), lower central foundation ring (2) and multi-disc assembled beam slab burst basis (3), go up central foundation ring (1) and central foundation ring (2) concentric shaft connection through the spelling crab-bolt (4) that are applied prestressing force and form a centre ring down, multi-disc assembled beam slab burst basis (3) are followed centre ring hoop arranges, and each assembled beam slab burst basis (3) are connected with the centre ring through base top steel strand wires (5) and base steel strand wires (6) that are applied prestressing force, and adjacent assembled beam slab burst basis (3) are connected through the spelling bolt (7) that are applied prestressing force.

2. The wind power tower multidirectional pre-stressed prefabricated assembly type beam-slab foundation according to claim 1, characterized in that the contact surfaces of the upper central foundation ring (1) and the lower central foundation ring (2) are coated with a waterproof glue layer (24).

3. The wind power generation tower multidirectional prestress prefabricated assembly type beam-slab foundation according to claim 1, wherein a leveling base plate (8) and a plain concrete cushion layer (25) are arranged at the lower parts of the multi-piece assembly type beam-slab segmented foundation (3) and the lower central foundation ring (2).

4. The wind power generation tower multidirectional prestress prefabricated assembled beam-slab foundation according to claim 3, wherein the leveling base plate (8) comprises steel rods (19), a leveling base plate top plate (20) and basket bolts (21), the leveling base plate top plate (20) is fixed to the ground through the steel rods (19) and the basket bolts (21), and the leveling base plate top plate (20) is flush with the plain concrete cushion layer (25) in height.

5. The wind power tower multidirectional pre-stressed prefabricated assembly type beam-slab foundation according to claim 1, wherein the base steel strands (5) are connected with an upper central foundation ring (1), and the base steel strands (6) are connected with a lower central foundation ring (2).

6. The wind power generation tower multidirectional prestress prefabricated assembled beam-slab foundation according to claim 1, wherein a vertical groove (23) for grouting is formed in a contact part of the assembled beam-slab segmented foundation (3) and a central ring.

7. The wind power generation tower multidirectional prestress prefabricated assembled beam-slab foundation according to claim 1, wherein a plurality of grouting holes (14) and a plurality of drainage holes (15) are formed in the assembled beam-slab segmented foundation (3).

8. The wind power generation tower multidirectional prestress prefabricated beam slab foundation according to claim 1, wherein a tower steel strand (16) and a cylinder inner cover plate (17) are connected to the upper center foundation ring (1).

9. The wind power generation tower multidirectional prestress prefabricated assembled beam-slab foundation according to claim 1, further comprising piles (9) arranged on the periphery of the multi-piece assembled beam-slab segmented foundation (3), wherein the piles (9) are connected with the assembled beam-slab segmented foundation (3) through hoop components.

10. The wind power tower multidirectional pre-stressed prefabricated assembly type beam-slab foundation according to claim 9, wherein the hoop assembly comprises a plurality of hoops (10) and pile bolts (11).