CN104894974A - Prestressed tendon tensioning device and use method of prestressed tendon tensioning device - Google Patents
Prestressed tendon tensioning device and use method of prestressed tendon tensioning device Download PDFInfo
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- CN104894974A CN104894974A CN201510177565.1A CN201510177565A CN104894974A CN 104894974 A CN104894974 A CN 104894974A CN 201510177565 A CN201510177565 A CN 201510177565A CN 104894974 A CN104894974 A CN 104894974A
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- presstressed reinforcing
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- reinforcing steel
- prestressed tendon
- tension
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Abstract
The invention relates to a prestressed tendon tensioning device, which comprises assemblies A and at least four pairs of assemblies B, wherein the assemblies A are table type force bearing mechanisms which are fixedly arranged at the two end sides of a main beam and are used for bearing the tension of prestressed tendons; each assembly B is a lock buckle which covers the corresponding prestressed tendon and can slide and move relative to the longitudinal bridge direction of the corresponding prestressed tendon; the lock buckles cover the at least two prestressed tendons in a 2*2 matrix mode; and each of the two lock buckles in the transverse bridge direction realizes the approaching movement in the transverse bridge direction relative to the middle lines of the two prestressed tendons through a tensioning mechanism. The prestressed tendon tensioning device does not need the help of a complicated prestress tensioning machine, can be widely applicable to the field of bridge building, and comprises a newly built deck continuous simply supported girder bridge and the continuously transformed existing simply supported girder bridge deck.
Description
Technical field
The invention provides a kind of tension of prestressed tendon device and using method thereof, belong to bridge construction technical field.
Background technology
At temperature drop load, under the effect such as concrete shrinkage and creep, there is stretcher strain, very easily make it occur the diseases such as cracking in concrete slab.By Shi Hanzhang, apply precompression to concrete slab, effectively can improve the cracking resistance of concrete slab.Traditional prestress application mode, needs outside prestressing force anchor head, adopt special prestress tensioning equipment to carry out stretch-draw, costly, and operates not easily when running into narrow space.
Summary of the invention
The object of the invention is for above weak point, provide a kind of tension of prestressed tendon device and using method thereof.
The scheme that technical solution problem of the present invention adopts is a kind of tension of prestressed tendon device, comprise assembly A and at least four couples of assembly B, described assembly A is the desk-top load mechanism of bearing presstressed reinforcing steel pulling force for being fixed on girder both end sides, described assembly B be to be coated on presstressed reinforcing steel can relatively prestressing force flaccidity of tendon and muscle bridge to the snap close of slippage, described snap close is that 2 × 2 matrix forms are coated at least two presstressed reinforcing steels, and the direction across bridge that two snap closes of described direction across bridge realize relative two presstressed reinforcing steel center lines respectively by strainer draws close motion.
Further, described desk-top load mechanism comprises the pedestal be fixed in girder both end sides, and described pedestal is fixed with crossbeam, described crossbeam is provided with the fixture for anchoring temporarily presstressed reinforcing steel.
Further, described snap close at least comprises two pieces of iron blocks, described iron block edge has semicircle hole, also offer but not manhole at grade vertical with semicircle hole, fit mutually and be connected in the semicircle hole side of described two pieces of iron blocks, described two halves circular opening composition is used for the circular opening of coated presstressed reinforcing steel.
Further, described strainer comprises bolt, and the manhole that described bolt direction across bridge is interspersed in two snap closes is inner, and described bolt is combined with nut.
Further, matched in clearance between described circular opening and presstressed reinforcing steel, is connected by bolt between described two pieces of iron blocks.
A using method for tension of prestressed tendon device, is characterized in that, comprises the following steps:
(1) between the bridge deck on the adjacent girder of simply supported girder bridge, each layout one in left and right is fixed on for bearing the desk-top load mechanism of pulling force on girder, and between two adjacent girders, arrange the template being used for concreting junction plate;
(2) two ends of presstressed reinforcing steel are each passed through the crossbeam of the desk-top load mechanism being positioned at two ends, left and right, and utilize fixture to carry out anchoring temporarily, two often adjacent presstressed reinforcing steels are one group;
(3) by two pieces of iron blocks parcel presstressed reinforcing steels, the circular opening making presstressed reinforcing steel pass two pieces of iron blocks to be formed, and vertically will two pieces of iron blocks lockings of parcel presstressed reinforcing steel with bolt, form snap close;
(4) arrange that four to vertical snap close of locking in midpoint 2 × 2 matrix form often organizing presstressed reinforcing steel;
(5) utilize some bolts respectively direction across bridge run through the manhole being positioned at two snap closes often organized on the direction across bridge of presstressed reinforcing steel, the snap close on same bolt that is positioned at that rotating nut makes often to organize in the middle part of presstressed reinforcing steel is drawn close to the center line of two adjacent presstressed reinforcing steels and is carried out direction across bridge stretch-draw;
(6) vertical bridge is carried out to stretch-draw to by often organizing the bolt of the same side lock in the middle part of presstressed reinforcing steel together with its inside respectively to the desk-top load mechanism slippage of both sides along vertical bridge;
(7) after stretch-draw, template arranges reinforcing cage, concreting in the template arranging reinforcing cage, until concrete curing reach be not less than concrete design strength value 75% and ensure between presstressed reinforcing steel and concrete junction plate, there are enough bondings time, loosen presstressed reinforcing steel and unload desk-top load mechanism and snap close, by the bonding of concrete junction plate and presstressed reinforcing steel to concrete junction plate Shi Hanzhang;
(8) concreting bridge deck between the bridge deck finally above the girder of concrete junction plate and simply supported girder bridge, make concrete junction plate be connected with the bridge deck above the girder of simply supported girder bridge.
Further, described in step (6) latch in along vertical bridge to movement after vertical bridge between two snap closes be greater than the vertical bridge of concrete junction plate to length to distance.
Further, presstressed reinforcing steel described in step (7) a metallic, after loosening, can excise the redundance exposing concrete junction plate or the concrete bridge deck intralamellar part be retained in step (8).
Further, the quantity of the presstressed reinforcing steel described in step (2) is even number root, and described presstressed reinforcing steel is single or the steel wire of bunchy, steel strand or reinforcing bar.
Compared with prior art, the present invention has following beneficial effect: the certain length section that the present invention makes often to organize two presstressed reinforcing steels by snap close wherein line draws close the prestressing force applying concrete junction plate, thus opposing is at temperature drop load, under the effect such as concrete shrinkage and creep, the vertical bridge that adjacent girder beam body deformability produces at bridge floor continuous structure place is to stretcher strain.This device, without the need to the prestressed stretch-draw facility by other complexity, can be widely used in bridge construction field, and the bridge floor comprising newly-built bridge floor continuous freely supported beam bridge and existing freely-supported bridge is transformed continuously.This apparatus structure is simple, easy to operate, working stability, cost are low.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, patent of the present invention is further illustrated.
Fig. 1 is the structural representation of snap close;
Fig. 2 is the using method schematic diagram one of this invention;
Fig. 3 is the using method schematic diagram two of this invention;
Fig. 4 is the A-A sectional view of Fig. 3;
Fig. 5 is the using method schematic diagram three of this invention;
Fig. 6 is the connection status schematic diagram of snap close, presstressed reinforcing steel and bolt;
Fig. 7 is the partial enlarged view of Fig. 5;
Fig. 8 is the using method schematic diagram four of this invention;
Fig. 9 is the partial enlarged view of Fig. 8;
Figure 10 is the using method schematic diagram five of this invention;
Figure 11 is the using method schematic diagram six of this invention;
Figure 12 is the using method schematic diagram seven of this invention;
Figure 13 is the B-B sectional view of Figure 12;
Figure 14 is the using method schematic diagram eight of this invention;
Figure 15 is the using method schematic diagram nine of this invention;
In figure:
1-girder; 2-bridge deck; The desk-top load mechanism of 3-; 4-concrete junction plate; 5-template; 6-presstressed reinforcing steel; 7-circular opening; 8-iron block; 9-manhole; 10-bolt; 11-nut; 12-concrete slab; 13-pedestal; 14-crossbeam; 15-fixture; 16-snap close; 17-strainer; The semicircle hole of 18-.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is further described.
As shown in Fig. 1 ~ 15, a kind of tension of prestressed tendon device, comprise assembly A and at least four couples of assembly B, described assembly A is the desk-top load mechanism 3 of bearing presstressed reinforcing steel 6 pulling force for being fixed on girder 1 both end sides, described assembly B is coated on presstressed reinforcing steel 6 relatively to indulge the snap close 16 of bridge to slippage by presstressed reinforcing steel 6, described snap close 16 is coated at least two presstressed reinforcing steels 6 in 2 × 2 matrix forms, and the direction across bridge that two snap closes 16 of described direction across bridge realize relative two presstressed reinforcing steel 6 center lines respectively by strainer 17 draws close motion.
In the present embodiment, described desk-top load mechanism 3 comprises the pedestal 13 be fixed in girder 1 both end sides, and described pedestal 13 is fixed with crossbeam 14, described crossbeam 14 is provided with the fixture 15 for anchoring temporarily presstressed reinforcing steel 6.
In the present embodiment, described snap close 16 at least comprises two pieces of iron blocks 8, described iron block 8 edge has semicircle hole 18, also offer but not manhole 9 at grade vertical with semicircle hole 18, fit mutually and be connected in described two pieces of iron block 8 semicircle hole 18 sides, described two halves circular opening 18 forms the circular opening 7 being used for coated presstressed reinforcing steel 6.
In the present embodiment, described strainer 17 comprises bolt 10, and the manhole 9 that described bolt 10 direction across bridge is interspersed in two snap closes 16 is inner, and described bolt 10 is combined with nut 11.
In the present embodiment, matched in clearance between described circular opening 7 and presstressed reinforcing steel 6, is connected by bolt between described two pieces of iron blocks 8.
A using method for tension of prestressed tendon device, is characterized in that, comprises the following steps:
(1) between the bridge deck 2 on the adjacent girder of simply supported girder bridge 1, each layout one in left and right is fixed on for bearing the desk-top load mechanism 3 of pulling force on girder 1, and between two adjacent girders 1, arrange the template 5 being used for concreting junction plate;
(2) two ends of presstressed reinforcing steel 6 are each passed through the crossbeam 14 of the desk-top load mechanism 3 being positioned at two ends, left and right, and utilize fixture 15 to carry out anchoring temporarily, often adjacent two presstressed reinforcing steels 6 are one group;
(3) wrap up presstressed reinforcing steel 6 by two pieces of iron blocks 8, make the circular opening 7 that presstressed reinforcing steel 6 is formed through two pieces of iron blocks 8, and vertically two pieces of iron blocks 8 of parcel presstressed reinforcing steel 6 are locked with bolt, form snap close 16;
(4) arrange that four to vertical snap close 16 of locking in midpoint 2 × 2 matrix form often organizing presstressed reinforcing steel 6;
(5) utilize some bolts 10 respectively direction across bridge run through the manhole 9 of two snap closes 16 be positioned on the direction across bridge often organizing presstressed reinforcing steel 6, the snap close 16 on same bolt 10 that is positioned at that rotating nut 11 makes often to organize in the middle part of presstressed reinforcing steel 6 is drawn close to the center line of two adjacent presstressed reinforcing steels 6 and is carried out direction across bridge stretch-draw;
(6) vertical bridge is carried out to stretch-draw to by often organizing the bolt 10 of the same side lock 16 in the middle part of presstressed reinforcing steel 6 together with its inside respectively to desk-top load mechanism 3 slippage of both sides along vertical bridge;
(7) after stretch-draw, template 5 arranges reinforcing cage, concreting in the template 5 arranging reinforcing cage, until concrete curing reach be not less than concrete design strength value 75% and ensure between presstressed reinforcing steel and concrete junction plate 4, there are enough bondings time, loosen presstressed reinforcing steel 6 and unload desk-top load mechanism 3 and snap close 16, by the bonding of concrete junction plate 4 and presstressed reinforcing steel 6 to concrete junction plate 4 Shi Hanzhang;
(8) concreting bridge deck 12 between the bridge deck 2 finally above the girder 1 of concrete junction plate 4 and simply supported girder bridge, make concrete junction plate 4 be connected with the bridge deck 2 above the girder 1 of simply supported girder bridge.
In the present embodiment, the vertical bridge of concrete junction plate 4 is greater than to length in the vertical bridge of the snap close 16 described in step (6) after along vertical bridge to movement between two snap closes 16 to distance.
In the present embodiment, presstressed reinforcing steel 6 described in step (7) a metallic, after loosening, can excise the redundance exposing concrete junction plate 4 or concrete slab 12 inside be retained in step (8).
In the present embodiment, the quantity of the presstressed reinforcing steel 6 described in step (2) is even number root, and described presstressed reinforcing steel 6 is single or the steel wire of bunchy, steel strand or reinforcing bar.
Above-listed preferred embodiment; the object, technical solutions and advantages of the present invention are further described; be understood that; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention; within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a tension of prestressed tendon device, it is characterized in that: comprise assembly A and at least four couples of assembly B, described assembly A is the desk-top load mechanism of bearing presstressed reinforcing steel pulling force for being fixed on girder both end sides, described assembly B be to be coated on presstressed reinforcing steel can relatively prestressing force flaccidity of tendon and muscle bridge to the snap close of slippage, described snap close is that 2 × 2 matrix forms are coated at least two presstressed reinforcing steels, and the direction across bridge that two snap closes of described direction across bridge realize relative two presstressed reinforcing steel center lines respectively by strainer draws close motion.
2. tension of prestressed tendon device according to claim 1, it is characterized in that: described desk-top load mechanism comprises the pedestal be fixed in girder both end sides, described pedestal is fixed with crossbeam, described crossbeam is provided with the fixture for anchoring temporarily presstressed reinforcing steel.
3. tension of prestressed tendon device according to claim 1, it is characterized in that: described snap close at least comprises two pieces of iron blocks, described iron block edge has semicircle hole, also offer but not manhole at grade vertical with semicircle hole, fit mutually and be connected in the semicircle hole side of described two pieces of iron blocks, described two halves circular opening composition is used for the circular opening of coated presstressed reinforcing steel.
4. the tension of prestressed tendon device according to claim 1 or 3, is characterized in that: described strainer comprises bolt, and the manhole that described bolt direction across bridge is interspersed in two snap closes is inner, and described bolt is combined with nut.
5. tension of prestressed tendon device according to claim 3, is characterized in that: matched in clearance between described circular opening and presstressed reinforcing steel, is connected between described two pieces of iron blocks by bolt.
6. a using method for tension of prestressed tendon device, is characterized in that, comprises the following steps:
(1) between the bridge deck on the adjacent girder of simply supported girder bridge, each layout one in left and right is fixed on for bearing the desk-top load mechanism of pulling force on girder, and between two adjacent girders, arrange the template being used for concreting junction plate;
(2) two ends of presstressed reinforcing steel are each passed through the crossbeam of the desk-top load mechanism being positioned at two ends, left and right, and utilize fixture to carry out anchoring temporarily, two often adjacent presstressed reinforcing steels are one group;
(3) by two pieces of iron blocks parcel presstressed reinforcing steels, the circular opening making presstressed reinforcing steel pass two pieces of iron blocks to be formed, and vertically will two pieces of iron blocks lockings of parcel presstressed reinforcing steel with bolt, form snap close;
(4) arrange that four to vertical snap close of locking in midpoint 2 × 2 matrix form often organizing presstressed reinforcing steel;
(5) utilize some bolts respectively direction across bridge run through the manhole being positioned at two snap closes often organized on the direction across bridge of presstressed reinforcing steel, the snap close on same bolt that is positioned at that rotating nut makes often to organize in the middle part of presstressed reinforcing steel is drawn close to the center line of two adjacent presstressed reinforcing steels and is carried out direction across bridge stretch-draw;
(6) vertical bridge is carried out to stretch-draw to by often organizing the bolt of the same side lock in the middle part of presstressed reinforcing steel together with its inside respectively to the desk-top load mechanism slippage of both sides along vertical bridge;
(7) after stretch-draw, template arranges reinforcing cage, concreting in the template arranging reinforcing cage, until concrete curing reach be not less than concrete design strength value 75% and ensure between presstressed reinforcing steel and concrete junction plate, there are enough bondings time, loosen presstressed reinforcing steel and unload desk-top load mechanism and snap close, by the bonding of concrete junction plate and presstressed reinforcing steel to concrete junction plate Shi Hanzhang;
(8) concreting bridge deck between the bridge deck finally above the girder of concrete junction plate and simply supported girder bridge, make concrete junction plate be connected with the bridge deck above the girder of simply supported girder bridge.
7. the using method of tension of prestressed tendon device according to claim 6, is characterized in that: described in step (6) latch in along vertical bridge to movement after vertical bridge between two snap closes be greater than the vertical bridge of concrete junction plate to length to distance.
8. the using method of tension of prestressed tendon device according to claim 6, it is characterized in that: presstressed reinforcing steel described in step (7) a metallic, after loosening, can excise the redundance exposing concrete junction plate or the concrete bridge deck intralamellar part be retained in step (8).
9. the using method of tension of prestressed tendon device according to claim 6, is characterized in that: the quantity of the presstressed reinforcing steel described in step (2) is even number root, and described presstressed reinforcing steel is single or the steel wire of bunchy, steel strand or reinforcing bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510177565.1A CN104894974B (en) | 2015-04-16 | 2015-04-16 | A kind of tension of prestressed tendon device and using method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510177565.1A CN104894974B (en) | 2015-04-16 | 2015-04-16 | A kind of tension of prestressed tendon device and using method thereof |
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| Publication Number | Publication Date |
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| CN104894974A true CN104894974A (en) | 2015-09-09 |
| CN104894974B CN104894974B (en) | 2016-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510177565.1A Expired - Fee Related CN104894974B (en) | 2015-04-16 | 2015-04-16 | A kind of tension of prestressed tendon device and using method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109093839A (en) * | 2018-08-10 | 2018-12-28 | 中国华西企业股份有限公司 | A kind of presstressed reinforcing steel stretching structure for pre-stress floor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2724960A1 (en) * | 1994-09-23 | 1996-03-29 | Huang Chia Hsiung | Anchor for supporting cradle |
| CN2249772Y (en) * | 1996-03-22 | 1997-03-19 | 石家庄市市政建设总公司 | Steel wire bounder |
| JP2006233498A (en) * | 2005-02-23 | 2006-09-07 | Oriental Construction Co Ltd | Bridge-fall prevention equipment |
| CN203923921U (en) * | 2014-07-10 | 2014-11-05 | 四川石油天然气建设工程有限责任公司 | A kind of cable adjusting device |
| CN204551279U (en) * | 2015-04-16 | 2015-08-12 | 福州大学 | A kind of tension of prestressed tendon device |
-
2015
- 2015-04-16 CN CN201510177565.1A patent/CN104894974B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2724960A1 (en) * | 1994-09-23 | 1996-03-29 | Huang Chia Hsiung | Anchor for supporting cradle |
| CN2249772Y (en) * | 1996-03-22 | 1997-03-19 | 石家庄市市政建设总公司 | Steel wire bounder |
| JP2006233498A (en) * | 2005-02-23 | 2006-09-07 | Oriental Construction Co Ltd | Bridge-fall prevention equipment |
| CN203923921U (en) * | 2014-07-10 | 2014-11-05 | 四川石油天然气建设工程有限责任公司 | A kind of cable adjusting device |
| CN204551279U (en) * | 2015-04-16 | 2015-08-12 | 福州大学 | A kind of tension of prestressed tendon device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109093839A (en) * | 2018-08-10 | 2018-12-28 | 中国华西企业股份有限公司 | A kind of presstressed reinforcing steel stretching structure for pre-stress floor |
| CN109093839B (en) * | 2018-08-10 | 2024-02-27 | 中国华西企业股份有限公司 | Prestressed rib stretching structure for prestressed floor slab |
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| CN104894974B (en) | 2016-09-07 |
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Granted publication date: 20160907 Termination date: 20190416 |