CN105040726A - Method for applying circular prestress on fan foundation connection - Google Patents
Method for applying circular prestress on fan foundation connection Download PDFInfo
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- CN105040726A CN105040726A CN201510468612.8A CN201510468612A CN105040726A CN 105040726 A CN105040726 A CN 105040726A CN 201510468612 A CN201510468612 A CN 201510468612A CN 105040726 A CN105040726 A CN 105040726A
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- pilaster
- prestress
- discharge ring
- backing plate
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Abstract
The invention provides a method for applying circular prestress on a fan foundation connector. The method can be used for reinforcing out-of-operation foundation circular connection of a built project put into operation, and can also be used for avoiding stress defects of foundation circular connection in a newly-built project. Steel pilasters and base plates are fixed to the outer side of a concrete pier, prestress steel strands penetrate through anchor plates of the steel pilasters and limiting rings of the base plates, prestress is applied to the two ends of each prestress steel strand, and special anchoring heads are installed at the two ends of each prestress steel strand. At last, thickened areas are arranged on the upper surface and the side face of the concrete pier, and are evenly provided with circular steel bars and vertical steel bars so as to protect the prestress steel strands, the steel pilasters, the special anchoring heads and the base plates in a wrapping manner. The multiple limiting rings are evenly welded to the base plates to limit the prestress steel strands. Each steel pilaster is composed of a pilaster base plate, rib plates and anchor plates, wherein the rib plates are evenly welded to the pilaster base plate, the anchor plates are welded to the pilaster base plate and the rib plates, each rib plate has the wide inside and the narrow outside, and therefore the two ends of each prestress steel strand perpendicularly act on the corresponding anchor plate.
Description
Technical field
The invention belongs to generation power foundation of wind power technical field of structures, be specifically related to a kind of for connecting the method applying ring orientation prestress to blower foundation.
Background technology
At present, single tube wind power generation stepped connection with bottom reinforcement bars concrete foundation often adopts pre-embedded foundation ring, upper column cylinder and discharge ring in reinforced concrete foundation to be realized by Flange joint.But, because discharge ring length of embedment is shallow, and be non-prestressed structure, discharge ring connection upper column cylinder and base foundation is adopted to there is following defect: the existing reinforcing bar in discharge ring region has again discharge ring to strengthen, only reinforcing bar is had with lower area, because strength and stiffness sudden change causes the crack because of hardening of concrete contraction and stressed generation to concentrate between discharge ring and base plate, crack width increases; Discharge ring isolates inside and outside concrete, because steel are different with concrete bi-material performance, coefficient of thermal expansion is different, distortion can not be coordinated, and temperature action, load work, frost heave action etc. make discharge ring and concrete gap constantly increase, the anchorage effect of both deteriorations; Under blower fan reciprocating fatigue load action, discharge ring join domain distress in concrete, gap constantly increase development, and then make discharge ring vibrate in base concrete, rock, and produce concrete percussion.
Basis connects the stressed defect the existed project problems that causes putting into operation and breaks out gradually, has a strong impact on running quality and the security of operation of blower fan.And project that is newly-built, that still adopt discharge ring to connect still does not have good measure to evade this defect.
Summary of the invention
The object of the present invention is to provide a kind of for connecting the method applying ring orientation prestress to blower foundation, both can be used for the reinforcing of the built item base ring Joint failure that puts into operation, and may be used for again the stressed defect that grassroot project evades basis connection.
It is a kind of for connecting the method applying ring orientation prestress to blower foundation that the present invention proposes, described blower foundation ring connects and is made up of discharge ring 1, concrete stub 2 and discharge ring slit region 3, described discharge ring 1 inserts concrete stub 2, discharge ring slit region 3 is provided with between described discharge ring 1 and concrete stub 2, when connecting Shi Hanzhang to basis, concrete steps are: be first positioned at concrete stub 2 both sides partly at discharge ring 1 and drill through some oblique grout holes 6, make described grout hole 6 lead to discharge ring slit region 3; Then by oblique grout hole 6 pairs of discharge ring slit region 3 pressure groutings, discharge ring slit region 3 and grout hole 6 is made all to fill full high-strength grouting material; Then be fixed on outside concrete stub 2 by steel pilaster 8 and backing plate 10, prestress wire 5 successively through the anchor slab 15 of steel pilaster 8 and the spacing ring 11 of backing plate 10, installs special anchorage head 9 at prestress wire 5 two ends Shi Hanzhang.Finally in upper surface and the side surface layout thicker region 4 of concrete stub 2, described thicker region 4 is evenly arranged circumferential reinforcement and vertical reinforcement 7, for wrapping up protection prestress wire 5, steel pilaster 8, special anchorage head 9 and backing plate 10.Several spacing rings 11 of uniform welding on described backing plate 10, spacing for prestress wire 5.
In the present invention, described steel pilaster 8 is made up of pilaster backing plate 13, floor 14 and anchor slab 15, and floor 14 is uniform to be welded on pilaster backing plate 13, and anchor slab 15 welds with pilaster backing plate 13 and floor 14, described floor 14 inner wide and outer narrow, makes prestress wire 5 two ends vertically act on anchor slab 15.
Beneficial effect of the present invention is:
1. what the present invention proposed is a kind of for connecting the method applying ring orientation prestress to blower foundation, structure is simple, reasonable stress, easy construction, both can be used for the stressed defect that grassroot project evades discharge ring connection, may be used for again the reinforcing of the built item base ring Joint failure that puts into operation.
2. after backing plate and steel pilaster are fixed, to prestress wire Shi Hanzhang, make concrete stub region by hoop precompression, contribute to concrete clamping discharge ring outside stub, concrete is made to be in preloading condition, can reduce distress in concrete, between concrete and discharge ring gap development, improve concrete bearing capacity and anti-fatigue performance.
3. when the present invention is used for the reinforcing of the built item base ring Joint failure that puts into operation, thicken ring beam measure in conjunction with top, the buried depth of discharge ring can be increased, improve concrete to the binding effect of discharge ring, and do not destroy original structure.
4., under ring orientation prestress effect, in discharge ring, outside concrete clamping discharge ring, makes a discharge ring part be forced through discharge ring and concrete frictional force transmission, and the stress reduced bottom discharge ring is concentrated.
5. steel column floor inner wide and outer narrow of the present invention, makes anchor slab become certain inclination angle with radial direction, guarantees that prestress wire is orthogonal with anchor slab, steel strand are not bent.
6. prestress application of the present invention does not intersect with concrete construction and maintenance, simple operation, easy construction.
Accompanying drawing explanation
Fig. 1 is that basis of the present invention connects front view.
Fig. 2 is the front view that the present invention applies.
Fig. 3 is the top view that the present invention applies.
Fig. 4 is backing plate detail drawing of the present invention.
Fig. 5 is steel pilaster detail drawing of the present invention.
Number in the figure: based on 1, ring, 2 is ring slit region based on concrete stub, 3,4 is thicker region, 5 be prestress wire, 6 be grout hole, 7 be circumferential reinforcement and vertical reinforcement, 8 be steel pilaster, 9 be special anchorage head, 10 be backing plate, 11 be spacing ring, 12 be curved plate, 13 be pilaster backing plate, 14 be floor, 15 be anchor slab.
Detailed description of the invention
The present invention is further illustrated by reference to the accompanying drawings below by embodiment.
Embodiment 1:
As shown in Figure 1, during basic Joint failure, between discharge ring 1 and concrete stub 2, produce discharge ring gap area 3.
When the present invention is applied to basis connection Shi Hanzhang, is first positioned at concrete stub 2 both sides partly at discharge ring 1 and drills through some oblique grout holes 6, make described grout hole 6 lead to discharge ring slit region 3; Then by oblique grout hole 6 pairs of discharge ring slit region 3 pressure groutings, discharge ring slit region 3 and grout hole 6 is made all to fill full high-strength grouting material; Then be fixed on outside concrete stub 2 by steel pilaster 8 and backing plate 10, prestress wire 5 successively through the anchor slab 15 of steel pilaster 8 and the spacing ring 11 of backing plate 10, installs special anchorage head 9 at prestress wire 5 two ends Shi Hanzhang.Finally in upper surface and the side surface layout thicker region 4 of concrete stub 2, described thicker region 4 is evenly arranged circumferential reinforcement and vertical reinforcement 7, for wrapping up protection prestress wire 5, steel pilaster 8, special anchorage head 9 and backing plate 10.
Implementation step is as follows:
(1) discharge ring 1 liang of sidetracking grout hole 6, notes the discharge ring gap area 3 of setting-out cleaning discharge ring 1 both sides in both sides grout hole 6;
(2) use slip casing by pressure material along grout hole 6, fill discharge ring gap area 3;
(3) be fixed on outside concrete stub 2 by steel pilaster 8 and backing plate 10, prestress wire 5 is successively through the anchor slab 15 of steel pilaster 8 and the spacing ring 11 of backing plate 10;
(4) at prestress wire 5 two ends Shi Hanzhang special anchorage head 9 is installed;
(5) in upper surface and the side surface layout thicker region 4 of concrete stub 2, described thicker region 4 is evenly arranged circumferential reinforcement and vertical reinforcement 7, for wrapping up protection prestress wire 5, steel pilaster 8, special anchorage head 9 and backing plate 10.
Claims (2)
1. one kind applies the method for ring orientation prestress for connecting blower foundation, described blower foundation ring connects by discharge ring (1), concrete stub (2) and discharge ring slit region (3) composition, described discharge ring (1) inserts concrete stub (2), discharge ring slit region (3) is provided with between described discharge ring (1) and concrete stub (2), it is characterized in that when connecting Shi Hanzhang to basis, concrete steps are: be first positioned at concrete stub (2) both sides partly at discharge ring (1) and drill through some oblique grout holes (6), described grout hole (6) is made to lead to discharge ring slit region (3), then by oblique grout hole (6) to discharge ring slit region (3) pressure grouting, make discharge ring slit region (3) and grout hole (6) all fill full high-strength grouting material, then steel pilaster (8) and backing plate (10) are fixed on concrete stub (2) outside, prestress wire (5) successively through the anchor slab (15) of steel pilaster (8) and the spacing ring (11) of backing plate (10), installs special anchorage head (9) at prestress wire (5) two ends Shi Hanzhang, finally at upper surface and side surface layout thicker region (4) of concrete stub 2, described thicker region (4) is evenly arranged circumferential reinforcement and vertical reinforcement (7), for wrapping up protection prestress wire (5), steel pilaster (8), special anchorage head (9) and backing plate (10), upper several spacing rings of uniform welding (11) of described backing plate (10), spacing for prestress wire (5).
2. according to claim 1 for connecting the method applying ring orientation prestress to blower foundation, it is characterized in that described steel pilaster (8) is made up of pilaster backing plate (13), floor (14) and anchor slab (15), floor (14) is uniform to be welded on pilaster backing plate (13), anchor slab (15) welds with pilaster backing plate (13) and floor (14), described floor (14) inner wide and outer narrow, makes prestress wire (5) two ends vertically act on anchor slab (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510468612.8A CN105040726B (en) | 2015-08-04 | 2015-08-04 | A kind of method for applying ring orientation prestress is connected to blower foundation ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510468612.8A CN105040726B (en) | 2015-08-04 | 2015-08-04 | A kind of method for applying ring orientation prestress is connected to blower foundation ring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105040726A true CN105040726A (en) | 2015-11-11 |
| CN105040726B CN105040726B (en) | 2017-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510468612.8A Active CN105040726B (en) | 2015-08-04 | 2015-08-04 | A kind of method for applying ring orientation prestress is connected to blower foundation ring |
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| CN (1) | CN105040726B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106592622A (en) * | 2016-12-19 | 2017-04-26 | 长安大学 | Annular concrete based wind-driven generator foundation structure with vertical prestress |
| CN106638733A (en) * | 2017-03-07 | 2017-05-10 | 长安大学 | Method for reinforcing fan foundation through additionally-arranged horizontal steel bars |
| CN106836324A (en) * | 2017-03-07 | 2017-06-13 | 长安大学 | A kind of blower foundation reinforcement means for setting up oblique tension reinforcement |
| CN110565680A (en) * | 2019-10-09 | 2019-12-13 | 兰州理工大学 | Steel grating ring type wind power tower foundation ring facility and construction method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2002122066A (en) * | 2000-10-16 | 2002-04-26 | Ps Corp | Wind power generating tower |
| CN202265838U (en) * | 2011-08-10 | 2012-06-06 | 同济大学建筑设计研究院(集团)有限公司 | Multidirectional prestress foundation of wind driven generator |
| CN104088291A (en) * | 2014-05-05 | 2014-10-08 | 安徽三建工程有限公司 | Annular wedge combined concrete precast block tower crane foundation |
| CN104790424A (en) * | 2015-04-17 | 2015-07-22 | 同济大学建筑设计研究院(集团)有限公司 | Reinforcing system and reinforcing method of wind power generation tower foundation ring foundation |
-
2015
- 2015-08-04 CN CN201510468612.8A patent/CN105040726B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002122066A (en) * | 2000-10-16 | 2002-04-26 | Ps Corp | Wind power generating tower |
| CN202265838U (en) * | 2011-08-10 | 2012-06-06 | 同济大学建筑设计研究院(集团)有限公司 | Multidirectional prestress foundation of wind driven generator |
| CN104088291A (en) * | 2014-05-05 | 2014-10-08 | 安徽三建工程有限公司 | Annular wedge combined concrete precast block tower crane foundation |
| CN104790424A (en) * | 2015-04-17 | 2015-07-22 | 同济大学建筑设计研究院(集团)有限公司 | Reinforcing system and reinforcing method of wind power generation tower foundation ring foundation |
Non-Patent Citations (1)
| Title |
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| 沈春林等: "《建筑的渗漏与防治》", 30 September 2008, 中国建材工业出版社 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106592622A (en) * | 2016-12-19 | 2017-04-26 | 长安大学 | Annular concrete based wind-driven generator foundation structure with vertical prestress |
| CN106638733A (en) * | 2017-03-07 | 2017-05-10 | 长安大学 | Method for reinforcing fan foundation through additionally-arranged horizontal steel bars |
| CN106836324A (en) * | 2017-03-07 | 2017-06-13 | 长安大学 | A kind of blower foundation reinforcement means for setting up oblique tension reinforcement |
| CN110565680A (en) * | 2019-10-09 | 2019-12-13 | 兰州理工大学 | Steel grating ring type wind power tower foundation ring facility and construction method |
| CN110565680B (en) * | 2019-10-09 | 2024-02-13 | 兰州理工大学 | Steel grating ring type wind power tower foundation ring facility and construction method |
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| Publication number | Publication date |
|---|---|
| CN105040726B (en) | 2017-03-08 |
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