CN101538898B - High-strength prestressed anchor bolt and combined device - Google Patents
High-strength prestressed anchor bolt and combined device Download PDFInfo
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- CN101538898B CN101538898B CN2008100347100A CN200810034710A CN101538898B CN 101538898 B CN101538898 B CN 101538898B CN 2008100347100 A CN2008100347100 A CN 2008100347100A CN 200810034710 A CN200810034710 A CN 200810034710A CN 101538898 B CN101538898 B CN 101538898B
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- anchor bolt
- slip casting
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- nut
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Abstract
The invention relates to a high-strength prestressed anchor bolt and a combined device. The high-strength prestressed anchor bolt (1) is used to replace a common stone bolt for improving solid joint strength. The anchor bolt (1) adopts a process of 'first stretching and pulling and then grouting' to prevent components from deforming and displacing for ensuring that all the components are consolidated into an inseparable integration. The solid joint state between a steel structure and a concrete foundation structure of a large-scale building is greatly improved so as to improve the stabilization and the safety and prolong the service life of the large-scale building.
Description
(1) technical field
The present invention relates to connecting of building and concrete foundation, especially the steel work of super-high buildings thing and concrete foundation is mechanical affixed.
(2) background technology
" safety first " is the primary requirement of any building.Therefore, " quality comes first in our mighty construction plan " has been common to all.Because the total quality of building is very huge, thereby the foundation structure engineering particular importance of load-bearing, in case completion is promptly forever constant, indestructible.
In addition, between super-high buildings thing Cong Li cloud, front face area is quite big.The building that high wind, shock wave, eddy current, cyclone etc. cause rocks, runout, also is one of important safety factor.Moreover the vibration that earthquake, underground explosion and other factors cause more need be paid the utmost attention to guard key to the structural safety of high-rise building.
In sum, various safety, ballast propose common a requirement to the super-high buildings thing: how building and foundation structure are joined together, and unbreakable, effectively permanent, with resistance to overturning, the reliability of guaranteeing building, make every effort to perfectly safe, put things right once and for all.
In the common engineering practice, how simply affixed with " stone bolt ", the steel reinforcing spare machinery that is about in a plurality of steel stone bolt and the foundation structure is affixed, and direct all around fluid concrete attempts to constitute iron and steel-concrete mass-type foundation structure.With the affixed building of this method, simple and convenient, be easy to construction, cost is also low, thereby is widely used.But, to ponder deeply and through facts have proved, this kind consolidation method is also unreliable, a lot of hidden danger is in the super-high buildings thing of particular importance, especially worrying.
Main performance is:
1. common stone bolt performance is not good, and tensile strength is limited, can produce plastic strain, several millimeters even tens millimeters of elongations under heavy duty.Theoretical calculating and actual test shows with the not high stone bolt of intensity, or with the method for common fluid concrete, can't firmly and stably be linked together large-scale, super-high buildings thing and foundation structure, thereby bring hidden danger to engineering safety.
2. because stone bolt does not apply the prestressing force of designing requirement in advance, earthquake, wind load will be to super-high buildings deposits yields mechanics influence, and consequently stone bolt produces plastic strain, even loses efficacy; Or will produce relative displacement between stone bolt, reinforcing bar and the concrete, and cause each member separated from one another, a lot of situations are that both have both at the same time.Though this displacement, separation are small, be difficult to discover, be unallowed in engineering design, because displacement, separate the globality that will destroy foundation structure, thus the formation potential safety hazard.
3. stone bolt is simply imbedded in the concrete, causes bolt corrosion easily, and this corrosion has not only reduced the intensity of bolt, even causes bolt directly to rupture; And bolt corrosion meeting volume expansion, thereby cause concrete foundation to produce the crack.This hidden dangers in project exists in a large number.
(3) summary of the invention
At above-mentioned phenomenon, the present invention proposes a kind of high-strength prestressed anchor bolt and composite set, can adopt the new technology of " pretensioning post-grouting " during construction, the affixed condition and the state of, super-high buildings thing large-scale and foundation structure in the hope of improving, improve affixed intensity, make it under heavy duty, unexpected stressed condition, still can guarantee the monolithic stability and the safety of building.
The present invention is achieved in that
1. the threaded anchor bolts in two ends (1) up and down are set, and locking nut (9), anchor plate (10), the anchoring nut (11) that combines as a whole is equipped with in its lower end, and Ball faced nut (3) is equipped with in its upper end, the taper hole backing plate (4) that matches with it;
2. anchor bolt stage casing (1a) is set in Sealed casing pipe (6) and the slip casting interface (8).Sealed casing pipe (6) leaves slip casting space (6a), the radial notch (d) on top, space and the Ball faced nut (3) with anchor bolt (1)
Communicate, its underpart in turn with slip casting interface (8) inner flow passage, L shaped Grouting Pipe (12) UNICOM; 3. Sealed casing pipe (6) upper and lower port, each port of slip casting interface (8) are sealed attachment;
4. slip casting interface (8) arranged around cushions rack (7);
5. protective cover (2) is equipped with in anchor bolt (1) upper end.
Good effect:
1. select for use high strength anchor bolt (hereinafter to be referred as " crab-bolt ") to substitute common stone bolt, fully guarantee its mechanical performance, make it below the design load value, not produce plastic strain (elongation).
2. be the technology of smooth implementation " pretensioning post-grouting ", the crab-bolt stage casing need place among the Sealed casing pipe, guarantees when the cast base concrete crab-bolt not to be contacted with concrete.
3. when the concrete foundation defects liability period finishes back installation steel construction piece, by design (calculated) load crab-bolt is applied axial pretension (crab-bolt produces the elongation that design allows) earlier, then, between crab-bolt and Sealed casing pipe, pour into the slurry that expands by L shaped Grouting Pipe (12), make itself and base concrete form an integral body.As long as the stressed design load that is not more than of the structural member that is fixed just can not produce relative displacement between crab-bolt, expansion slurry and concrete foundation three, thereby guarantee the stable and safety of total.
After taking abovementioned technology, the affixed intensity of building and crab-bolt improves greatly, because stone bolt multiple disadvantage former thereby that cause is eliminated.This is significant to the quite huge engineering of investment.The aim of " quality comes first in our mighty construction plan " obtains technical another assurance.
(4) description of drawings
The invention will be further described below in conjunction with accompanying drawing.
Accompanying drawing is the structural representation of high-strength prestressed anchor bolt and composite set.
(5) specific embodiment
Crab-bolt (1) is a ultra-large type high strength stud, and intensity can reach 12.9 grades.Selected material and processing technology thereof can guarantee its yield strength (σ
s), tensile strength (σ
b) and other mechanical performance index reach designing requirement.
When crab-bolt (1) was just adorned, the lower end was imbedded in the concrete foundation.After concrete is dry, crab-bolt (1) is applied axial tension with tensioner.(at this moment anchor bolt (1) can produce the elongation that design allows) tightens upper end Ball faced nut (3) after pretension reaches the design predetermined value, keeps (locking) each member relative position constant.As long as the pulling force that anchor bolt (1) in use bears is no more than the design pretension, its just not anamorphic stretching once more, thereby eliminated the relative displacement between anchor bolt (1) and the foundation structure, it is a complete integral body (seamless) that anchor bolt (1) and foundation structure are formed.This point is significant to the stability and security that guarantees whole building.
Connecting with locking nut (9), anchor plate (10), anchoring nut (11) to one and locking in anchor bolt (1) lower end, is embedded in the foundation structure depths in advance.Connecting and be one with Ball faced nut (3), taper hole backing plate (4) in anchor bolt (1) upper end, is pressed on the fabric structure spare (5).The engages adjustable eccentric load of sphere and taper hole.Have radial notch (d) on the sphere of Ball faced nut (3), the perfusion degree is observed in exhaust when starching in order to expand in perfusion, overflow.Anchor bolt (1) stage casing is set among (a) suitable for reading and end opening (b) of Sealed casing pipe (6) and slip casting interface (8), and leaves slip casting space (6a).
Sealed casing pipe (6) is hollow straight cylinder, and upper and lower port is smooth.Its material and form of structure have multiple, as the PVC flexible pipe or the plastic pipe (but all market purchasings) of metal bellows, embedded spiral wire skeleton.For guaranteeing that anchor bolt (1) thoroughly separates with base concrete, Sealed casing pipe (6) upper end contacts with spigot seal under the taper hole backing plate (4).And the upper end of Sealed casing pipe (6) must fully exceed concrete foundation plane (during mounting structure spare again by needs length), and seal protection in addition, has foreign matter to fall in the Sealed casing pipe (6) when preventing fluid concrete.(a) suitable for reading and the sealing of slip casting interface (8) inserted in the lower end of Sealed casing pipe (6).
The upper and lower opening (a) and (b) of slip casting interface (8) are straight-through, the downward-sloping and L shaped Grouting Pipe of collateral branch's mouth (c) (12) UNICOM and sealing.The end opening (b) (conical surface) of slip casting interface (8) contacts with the awl mouth sealing of locking nut (9), guarantees that water, gas do not leak.
Constitute the seal cavity (6a) in the Sealed casing pipe (6) thus, the base concrete outer with pipe do not contact mutually.In order to ensure sealing, improve the connection quality, inject special expansion slurry by L shaped Grouting Pipe (12), the institute that is full of from bottom to top in the Sealed casing pipe (6) has living space, all residual gases in getting rid of Sealed casing pipe (6) are till the slurry that expands overflows from the radial notch (d) of Ball faced nut (3).
In order to prevent external shock, guarantee (a) and (b), (c) mouthful sealing effectiveness of slip casting interface (8), can be at the arranged around rigidity buffering rack (7) of slip casting interface (8), its material and form of structure have multiple, as steel coil springs formula, plastic skeleton net cage type, metal gate form etc., can make by oneself or market purchasing.
For the upper end of protecting anchor bolt (1) is not subjected to external impacts and rainwater etch; and raising aesthetics; install closed turret head protective cover (2) additional in the upper end of anchor bolt (1); its internal thread and anchor bolt (1) match; end mouth has " O " RunddichtringO (e) to make flat seal, in preventing to seep water.
Claims (4)
1. one kind is used for super-high buildings and the fixed high-strength prestressed anchor bolt composite set of foundation structure machinery; by anchor bolt (1); Ball faced nut (3), taper hole backing plate (4), Sealed casing pipe (6); slip casting interface (8); anchoring nut (11), locking nut (9), anchor plate (10); L shaped Grouting Pipe (12) and protective cover (2) and buffering rack (7) are formed, and it is characterized in that:
1. the threaded anchor bolts in two ends (1) up and down are set, and locking nut (9), anchor plate (10), the anchoring nut (11) that combines as a whole is equipped with in its lower end, and Ball faced nut (3) is equipped with in its upper end, the taper hole backing plate (4) that matches with it;
2. anchor bolt stage casing (1a) is set in Sealed casing pipe (6) and the slip casting interface (8), Sealed casing pipe (6) leaves slip casting space (6a) with anchor bolt (1), top, space communicates with radial notch (d) on the Ball faced nut (3), its underpart in turn with slip casting interface (8) inner flow passage, L shaped Grouting Pipe (12) UNICOM;
3. Sealed casing pipe (6) upper and lower port, each port of slip casting interface (8) are sealed attachment;
4. slip casting interface (8) arranged around cushions rack (7);
5. protective cover (2) is equipped with in anchor bolt (1) upper end.
2. by the described anchor bolt composite set of claim 1, it is characterized in that: Sealed casing pipe (6) adopts the PVC flexible pipe or the plastic pipe of metal bellows, embedded spiral wire skeleton.
3. by the described anchor bolt composite set of claim 1, it is characterized in that: buffering rack (7) adopts steel coil springs formula, plastic skeleton net cage type or metal gate form.
4. by the described anchor bolt composite set of claim 1, it is characterized in that: protective cover (2) internal thread and anchor bolt (1) match, and end mouth has " O " shape sealing ring (e).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100347100A CN101538898B (en) | 2008-03-17 | 2008-03-17 | High-strength prestressed anchor bolt and combined device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100347100A CN101538898B (en) | 2008-03-17 | 2008-03-17 | High-strength prestressed anchor bolt and combined device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101538898A CN101538898A (en) | 2009-09-23 |
| CN101538898B true CN101538898B (en) | 2011-10-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100347100A Active CN101538898B (en) | 2008-03-17 | 2008-03-17 | High-strength prestressed anchor bolt and combined device |
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| Country | Link |
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| CN (1) | CN101538898B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103510624B (en) * | 2012-06-21 | 2016-03-02 | 华锐风电科技(集团)股份有限公司 | The construction method of foot bolt fastening device and this device |
| CN105735485A (en) * | 2014-12-12 | 2016-07-06 | 山东大学 | Anchoring device and method for reinforced concrete wall attachment equipment |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992007216A1 (en) * | 1990-10-12 | 1992-04-30 | Andruan Services Ltd | Improvements relating to bolt hole formers |
| CN2374592Y (en) * | 1999-05-13 | 2000-04-19 | 桑永 | Grouting screw |
| CN2475833Y (en) * | 2001-04-28 | 2002-02-06 | 李晓峰 | Prestressing grouting for external head of anchor rod |
| CN2623744Y (en) * | 2003-04-04 | 2004-07-07 | 晖毅预力器材股份有限公司 | Prestressing force rear tensing system modularized device |
| GB2403736A (en) * | 2003-07-08 | 2005-01-12 | Saul Tristan Charlton | Shroud for a bolt to be set in concrete |
| WO2005073510A1 (en) * | 2004-01-28 | 2005-08-11 | Denki Kagaku Kogyo Kabushiki Kaisha | Expandable injection bolt and grouting method using same |
| CN1727144A (en) * | 2005-07-27 | 2006-02-01 | 上海人造板机器厂有限公司 | Structure of bottom girder of continuous press and installation |
| CN1884716A (en) * | 2006-06-05 | 2006-12-27 | 吴德兴 | Prestress anchor device |
-
2008
- 2008-03-17 CN CN2008100347100A patent/CN101538898B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992007216A1 (en) * | 1990-10-12 | 1992-04-30 | Andruan Services Ltd | Improvements relating to bolt hole formers |
| CN2374592Y (en) * | 1999-05-13 | 2000-04-19 | 桑永 | Grouting screw |
| CN2475833Y (en) * | 2001-04-28 | 2002-02-06 | 李晓峰 | Prestressing grouting for external head of anchor rod |
| CN2623744Y (en) * | 2003-04-04 | 2004-07-07 | 晖毅预力器材股份有限公司 | Prestressing force rear tensing system modularized device |
| GB2403736A (en) * | 2003-07-08 | 2005-01-12 | Saul Tristan Charlton | Shroud for a bolt to be set in concrete |
| WO2005073510A1 (en) * | 2004-01-28 | 2005-08-11 | Denki Kagaku Kogyo Kabushiki Kaisha | Expandable injection bolt and grouting method using same |
| CN1727144A (en) * | 2005-07-27 | 2006-02-01 | 上海人造板机器厂有限公司 | Structure of bottom girder of continuous press and installation |
| CN1884716A (en) * | 2006-06-05 | 2006-12-27 | 吴德兴 | Prestress anchor device |
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| Publication number | Publication date |
|---|---|
| CN101538898A (en) | 2009-09-23 |
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