CN102704691B - Whole-bundle disanchoring device and disanchoring method adopting same - Google Patents
Whole-bundle disanchoring device and disanchoring method adopting same Download PDFInfo
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- CN102704691B CN102704691B CN201210182051.1A CN201210182051A CN102704691B CN 102704691 B CN102704691 B CN 102704691B CN 201210182051 A CN201210182051 A CN 201210182051A CN 102704691 B CN102704691 B CN 102704691B
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Abstract
The invention discloses a whole-bundle disanchoring device and a disanchoring method adopting the same. The whole-bundle disanchoring device comprises a top-front working pile and a top-rear disanchoring device, wherein the top-front working pile is pipe-shaped and is arranged at the outer part of one end of a large prestressed member; the top-rear disanchoring device is formed by a first ring, a second ring and a plurality of cylinders; the first ring and the second ring are arranged in parallel; the plurality of cylinders are arranged between the first ring and the second ring at a distance; one end of each cylinder is fixed on the first ring, and the other end of each cylinder is connected on the second ring by a bolt. The whole-bundle disanchoring device and the disanchoring method disclosed by the invention has the beneficial effects that the top-front working pile and the top-rear disanchoring device are respectively arranged at the outer parts of a temporary anchor and a first working anchor in the disanchoring process of a prestressed steel-stranded bundle and is used for assisting a hollow jack and the working anchor to finish the assembly and disassembly of a working clamping piece together and eliminating the stress, so that works such the construction process of whole disanchoring operation of the prestressed steel-stranded bundle are finished. The whole-bundle disanchoring device disclosed by the invention has the advantages of simple design, simpleness and convenience for operation and the like.
Description
Technical field
The invention belongs to prestress engineering technical field of construction, particularly relate to a kind of anchor method that moves back that cuts with scissors the whole bundle anchor restorer of bundle and adopt this whole bundle anchor restorer for removing prestress steel.
Technical background
Develop rapidly along with Large Span Bridges, the quantity of various large-scale components constantly increases, wherein the use of prestressed member is also more and more, it not only has all advantages of steel concrete, but also can give full play to the characteristic of high-strength material (strong concrete, high strength cast iron), so the sectional dimension of member is little, the ratio that deadweight moment of flexure accounts for total moment of flexure declines greatly, and the span ability of structure is improved.In addition, compare with steel concrete, prestressed member can be saved 30～40% steel, larger across footpath, saves the more.Prestressed member can also reduce structural cracks simultaneously, improves the durability of structure.In addition, in the work progress of some engineering, sometimes need to arrange some interim prestressed members, after having constructed, need these interim prestressed members to remove.The key of removing prestressed member is the prestress steel consisting of the presstressed reinforcing steel hinge bundle of removing wherein, and this process is also referred to as moving back anchor.As everyone knows, because the stress of prestress steel hinge bundle in large-sized prestress member is very large, so Demolishing Technology is loaded down with trivial details, and security control requirements is high, and difficulty of construction is very large.The method for dismounting of conventional interim prestress steel hinge bundle is to adopt single top by root, to remove the method for presstressed reinforcing steel at present, the shortcoming of the method is complex operation, efficiency of construction is lower, dangerous high, and overall pulling down construction very flexible, these reasons all can directly affect using and developing of large span structure, building.
Summary of the invention
In order to address the above problem, the object of the present invention is to provide a kind of structure &processes simply applied widely, the scene of being beneficial to controls, whole bundle anchor restorer and adopt the anchor method that moves back of this whole bundle anchor restorer safely and efficiently.
In order to achieve the above object, whole bundle anchor restorer provided by the invention comprises before top anchor restorer after working pile and top, wherein in a tubular form, the one end that is arranged on large-sized prestress member is outside for the front working pile in top, and the prestress steel hinge bundle that is positioned at large-sized prestress member one end is run through in inside, and in the circumferential wall of the front working pile in top, is formed with two work hand holes, after pushing up, anchor restorer is arranged on the outside, outer end of the front working pile in top in the mode coaxial with pushing up front working pile, before itself and top, between working pile, be provided with open-core type jack, behind top, anchor restorer is by the first annulus, the second annulus and Duo Gen cylinder form, wherein the first annulus and the second annulus opposing parallel arrange, many cylinder standoff distances are arranged between the first annulus and the second annulus, one end of cylinder is fixed on the first annulus, the other end is bolted on the second annulus, integral body forms cylindrical structure thus, and on the first annulus, be formed with a plurality of bolts that utilize anchor restorer behind top is fixed on to the bolt hole on open-core type jack.
In the circumferential wall of described two work hand holes working pile before top, be symmetrical arranged.
Many described cylinders arrange at the first annulus and the second annulus equal intervals.
Described a plurality of bolts hole arrange in the first annulus equal intervals.
Adopt the anchor method that moves back of whole bundle anchor restorer provided by the invention to comprise the following step carrying out in order:
1) first by staff, working pile is arranged on interim ground tackle, the prestress steel of large-sized prestress member one end hinge bundle is outside, and working pile before top is enclosed within to the outside of interim anchor ring;
2) prestress steel is cut with scissors to bundle through being fixed on support and being positioned at the open-core type jack that pushes up front working pile outside, and work for No. 1 ground tackle and the rear anchor restorer in top are installed outside open-core type jack;
3) open-core type jack is gone out in advance to top original text 130mm, between mounted No. 1 work ground tackle and prestress steel hinge bundle, squeeze into intermediate plate, so that prestress steel hinge bundle is clamped;
4) open-core type jack continues top, now No. 1 work ground tackle is by the stress bearing from prestress steel hinge bundle and open-core type jack, interim ground tackle does not stress, intermediate plate in therefore interim ground tackle will produce loosening, and staff all takes out above-mentioned loosening intermediate plate by work hand hole afterwards;
6) open-core type jack move back top pick to the distance between pick and the first annulus be 40mm place, by the method for bolt-through the first annulus upper bolt hole, anchor restorer behind top and open-core type jack are firmly linked together, then after being positioned at top, outside the prestress steel hinge bundle in anchor restorer outside, work ground tackle is installed No. 2, and work and squeeze into intermediate plate between ground tackle and prestress steel hinge bundle at No. 2, so that prestress steel hinge is restrainted to clamping;
7) open-core type jack continues to move back top pick, now No. 2 work ground tackle is by the stress bearing from prestress steel hinge bundle and open-core type jack, No. 1 work ground tackle does not stress, therefore the intermediate plate in No. 1 work ground tackle will produce and become flexible, and staff all moves to above-mentioned loosening intermediate plate near the second annulus by pushing up on rear anchor restorer the space between cylinder afterwards;
8) open-core type very heavy eject to the distance between No. 1 work ground tackle and the second annulus be 50mm place, then at No. 1, work and squeeze into intermediate plate between ground tackle and prestress steel hinge bundle, so that prestress steel hinge bundle is clamped, continue afterwards top, now No. 1 work ground tackle is by the stress bearing from prestress steel hinge bundle and open-core type jack, No. 2 work ground tackle does not stress, therefore the intermediate plate in No. 2 work ground tackle will produce loosening, staff all cuts with scissors Shu Qianyi 200mm along prestress steel by above-mentioned loosening intermediate plate afterwards, then move back top, complete thus a circulation,
9) repeating step 6) to step 8) until the reading on open-core type jack shows that when putting tensile stress is less than 10MPa, the work hand hole from interim ground tackle cuts off prestress steel twist-beam, complete thus the anchor process of moving back of whole prestress steel twist-beam.
Whole bundle anchor restorer provided by the invention and adopt this whole bundle anchor restorer move back anchor method be prestress steel twist-beam move back anchor process in will top before behind working pile and top anchor restorer be placed in respectively the outside of interim ground tackle and open-core type jack, be used for assisting open-core type jack and work ground tackle jointly to complete peace and tear work clip sheet open, unload de-stress, thereby complete prestress steel twist-beam integral body and move back the work such as anchor job execution process, not only can greatly reduce the dismounting duration of prestress steel twist-beam, operating efficiency is high, safety and good stability, and reasonable in design, simply, convenient operation, and be applicable to different parts, the dismounting of different root bundle prestress steel twist-beams.
Accompanying drawing explanation
Fig. 1 is the front working pile structural representation in top in whole bundle anchor restorer provided by the invention.
Fig. 2 is the rear anchor restorer structural representation in top in whole bundle anchor restorer provided by the invention.
Fig. 3 is for adopting whole bundle anchor restorer provided by the invention to move back anchor process schematic diagram.
The specific embodiment
Below in conjunction with the drawings and specific embodiments to whole bundle anchor restorer provided by the invention and move back anchor method and be elaborated.
As shown in Figure 1-Figure 3, whole bundle anchor restorer provided by the invention comprises the rear anchor restorer 2 of working pile 1 and top before top, wherein in a tubular form, the one end that is arranged on large-sized prestress member 3 is outside for the front working pile 1 in top, and the prestress steel hinge bundle 4 that is positioned at large-sized prestress member 3 one end is run through in inside, and in the circumferential wall of the front working pile 1 in top, is formed with two work hand holes 5, after pushing up, anchor restorer 2 is arranged on the outside, outer end of the front working pile 1 in top in the mode coaxial with pushing up front working pile 1, before itself and top, between working pile 1, be provided with open-core type jack 18, behind top, anchor restorer 2 is by the first annulus 6, the second annulus 7 and Duo Gen cylinder 8 form, wherein the first annulus 6 and the second annulus 7 opposing parallel settings, many cylinder 8 standoff distances are arranged between the first annulus 6 and the second annulus 7, one end of cylinder 8 is fixed on the first annulus 6, the other end is connected on the second annulus 7 by bolt 9, integral body forms cylindrical structure thus, and on the first annulus 6, be formed with a plurality of bolts that utilize anchor restorer 2 behind top is fixed on to the bolt hole on open-core type jack 18.
In the circumferential wall of described two work hand holes 5 working pile 1 before top, be symmetrical arranged.
Described many cylinders 8 are in the first annulus 6 and the second annulus 7 equal intervals settings.
Described a plurality of bolts hole are in the first annulus 6 equal intervals settings.
Before described top, the internal diameter of working pile 1 is 165mm, and external diameter is 250mm, and height is 220mm; Behind top, the external diameter of anchor restorer 2 is 400mm, and height is 310mm.
Adopt the anchor method that moves back of whole bundle anchor restorer provided by the invention to comprise the following step carrying out in order:
1) first by staff, working pile is arranged on interim ground tackle 10, the prestress steel of large-sized prestress member 3 one end hinge is restrainted 4 outsides, and working pile 1 before top is enclosed within to the outside of interim anchor ring 10;
2) prestress steel hinge is restrainted to 4 through being fixed on support and being positioned at the open-core type jack 18 that pushes up front working pile 1 outside, and in open-core type jack 18 outsides, install and work ground tackle 11 for No. 1 and push up rear anchor restorer 2;
3) open-core type jack 18 is gone out in advance to top original text 130mm, between mounted No. 1 work ground tackle 11 and prestress steel hinge bundle 4, squeeze into intermediate plate, so that prestress steel hinge bundle 4 is clamped;
4) open-core type jack 18 continues top, now No. 1 work ground tackle 11 is by the stress bearing from prestress steel hinge bundle 4 and open-core type jack 18, interim ground tackle 10 does not stress, intermediate plate in therefore interim ground tackle 10 will produce loosening, and staff all takes out above-mentioned loosening intermediate plate by work hand hole 5 afterwards;
6) open-core type jack 18 move back top pick to the distance between pick and the first annulus 6 be 40mm place, by the method for bolt-through the first annulus 6 upper bolt holes, anchor restorer 2 behind top and open-core type jack 18 are firmly linked together, then after being positioned at top, the prestress steel in anchor restorer 2 outsides hinge is restrainted No. 2 work ground tackle 12 of 4 outer installation, and work and squeeze into intermediate plate between ground tackle 12 and prestress steel hinge bundle 4 at No. 2, so that prestress steel hinge is restrainted to 4 clampings;
7) open-core type jack 18 continues to move back top pick, now No. 2 work ground tackle 12 is by the stress bearing from prestress steel hinge bundle 4 and open-core type jack 18, No. 1 work ground tackle 11 does not stress, therefore the intermediate plate in No. 1 work ground tackle 11 will produce and become flexible, and staff all moves to above-mentioned loosening intermediate plate near the second annulus 7 by pushing up on rear anchor restorer 2 space between cylinder 8 afterwards;
8) to go out top to the distance between No. 1 work ground tackle 11 and the second annulus 7 be 50mm place for open-core type jack 18, then at No. 1, work and squeeze into intermediate plate between ground tackle 11 and prestress steel hinge bundle 4, so that prestress steel hinge bundle 4 is clamped, continue afterwards top, now No. 1 work ground tackle 11 is by the stress bearing from prestress steel hinge bundle 4 and open-core type jack 18, No. 2 work ground tackle 12 does not stress, therefore the intermediate plate in No. 2 work ground tackle 12 will produce loosening, staff all restraints 4 reach 200mm along prestress steel hinge by above-mentioned loosening intermediate plate afterwards, then move back top, complete thus a circulation,
9) repeating step 6) to step 8) until the reading on open-core type jack 18 shows that when putting tensile stress is less than 10MPa, the work hand hole 5 from interim ground tackle 10 cuts off prestress steel twist-beam 4, complete thus the anchor process of moving back of whole prestress steel twist-beam 4.
Claims (5)
1. a whole bundle anchor restorer, is characterized in that: described whole bundle anchor restorer comprises the rear anchor restorer (2) of working pile (1) and top before top, wherein the front working pile (1) in top in a tubular form, the one end that is arranged on large-sized prestress member (3) is outside, the prestress steel hinge bundle (4) that is positioned at large-sized prestress member (3) one end is run through in inside, and in the circumferential wall of the front working pile (1) in top, is formed with two work hand holes (5), after pushing up, anchor restorer (2) is arranged on the outside, outer end of the front working pile (1) in top in the mode coaxial with pushing up front working pile (1), before itself and top, between working pile (1), be provided with open-core type jack (18), behind top, anchor restorer (2) is by the first annulus (6), the second annulus (7) and many cylinders (8) form, wherein the first annulus (6) and the second annulus (7) opposing parallel setting, many cylinders (8) standoff distance is arranged between the first annulus (6) and the second annulus (7), one end of cylinder (8) is fixed on the first annulus (6), the other end is connected on the second annulus (7) by bolt (9), integral body forms cylindrical structure thus, and on the first annulus (6), be formed with a plurality of utilize bolt will push up after anchor restorer (2) be fixed on the bolt hole on open-core type jack (18).
2. whole bundle anchor restorer according to claim 1, is characterized in that: in the circumferential wall of described two work hand holes (5) working pile (1) before top, be symmetrical arranged.
3. whole bundle anchor restorer according to claim 1, is characterized in that: described many cylinders (8) are in the first annulus (6) and the second annulus (7) equal intervals setting.
4. whole bundle anchor restorer according to claim 1, is characterized in that: described a plurality of bolts hole are in the first annulus (6) equal intervals setting.
5. the anchor method that moves back that adopts whole bundle anchor restorer as claimed in claim 1, is characterized in that: the described anchor method that moves back comprises the following step carrying out in order:
1) first by staff, working pile is arranged on interim ground tackle (10), be prestress steel hinge bundle (4) outside of large-sized prestress member (3) one end, and will push up the outside that front working pile (1) is enclosed within interim anchor ring (10);
2) by prestress steel hinge bundle (4) through be fixed on support and be positioned at top before the open-core type jack (18) in working pile (1) outside, and the rear anchor restorer (2) of work ground tackle (11) and top is installed in open-core type jack (18) outside No. 1;
3) open-core type jack (18) is gone out to top original text 130mm in advance, between mounted No. 1 work ground tackle (11) and prestress steel hinge bundle (4), squeeze into intermediate plate, so that prestress steel hinge bundle (4) is clamped;
4) open-core type jack (18) continues top, now No. 1 work ground tackle (11) will bear the stress from prestress steel hinge bundle (4) and open-core type jack (18), interim ground tackle (10) does not stress, intermediate plate in therefore interim ground tackle (10) will produce loosening, and staff all takes out above-mentioned loosening intermediate plate by work hand hole (5) afterwards;
6) open-core type jack (18) move back top pick to the distance between pick and the first annulus (6) be 40mm place, after pushing up by the method for bolt-through the first annulus (6) upper bolt hole, anchor restorer (2) and open-core type jack (18) firmly link together, work ground tackle (12) is then installed outside the prestress steel hinge bundle (4) in anchor restorer (2) outside No. 2 after being positioned at top, and work and squeeze into intermediate plate between ground tackle (12) and prestress steel hinge bundle (4) at No. 2, so that prestress steel hinge is restrainted to (4) clamping;
7) open-core type jack (18) continues to move back top pick, now No. 2 work ground tackle (12) will bear the stress from prestress steel hinge bundle (4) and open-core type jack (18), No. 1 work ground tackle (11) do not stress, therefore the intermediate plate in No. 1 work ground tackle (11) will produce looseningly, and staff above all moves to above-mentioned loosening intermediate plate near the second annulus (7) in the space between cylinder (8) by pushing up rear anchor restorer (2) afterwards;
8) to go out top to the distance between No. 1 work ground tackle (11) and the second annulus (7) be 50mm place to open-core type jack (18), then at No. 1, work and squeeze into intermediate plate between ground tackle (11) and prestress steel hinge bundle (4), so that prestress steel hinge bundle (4) is clamped, continue afterwards top, now No. 1 work ground tackle (11) will bear the stress from prestress steel hinge bundle (4) and open-core type jack (18), No. 2 work ground tackle (12) do not stress, therefore the intermediate plate in No. 2 work ground tackle (12) will produce loosening, staff all restraints (4) reach 200mm along prestress steel hinge by above-mentioned loosening intermediate plate afterwards, then move back top, complete thus a circulation,
9) repeating step 6) to step 8) until the reading on open-core type jack (18) shows that when putting tensile stress is less than 10MPa, the work hand hole (5) from interim ground tackle (10) cuts off prestress steel twist-beam (4), complete thus the anchor process of moving back of whole prestress steel twist-beam (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210182051.1A CN102704691B (en) | 2012-06-05 | 2012-06-05 | Whole-bundle disanchoring device and disanchoring method adopting same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210182051.1A CN102704691B (en) | 2012-06-05 | 2012-06-05 | Whole-bundle disanchoring device and disanchoring method adopting same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102704691A CN102704691A (en) | 2012-10-03 |
| CN102704691B true CN102704691B (en) | 2014-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210182051.1A Active CN102704691B (en) | 2012-06-05 | 2012-06-05 | Whole-bundle disanchoring device and disanchoring method adopting same |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104631835A (en) * | 2013-11-15 | 2015-05-20 | 五冶集团上海有限公司 | Prestressed beam and slab stretching-drawing group-bundle steel strand anchor receding device and application thereof |
| CN107419906B (en) * | 2017-09-25 | 2023-03-14 | 中铁五局集团有限公司 | Prestressed steel strand double-top anchor withdrawing device and method |
| CN107975240B (en) * | 2017-11-30 | 2020-05-01 | 中国一冶集团有限公司 | Anchor withdrawal secondary tensioning device and construction method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1058573A (en) * | 1964-05-20 | 1967-02-15 | Hoskuld Olav Schancke Hanssen | A method and means for prestressing a concrete structure |
| CN101509385A (en) * | 2009-03-24 | 2009-08-19 | 中煤第五建设公司矿业分公司 | Cable stretching jack releasing device |
| CN202228093U (en) * | 2011-09-06 | 2012-05-23 | 焦作煤业集团赵固（新乡）能源有限责任公司 | Portable anchor wire withdrawing device |
-
2012
- 2012-06-05 CN CN201210182051.1A patent/CN102704691B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1058573A (en) * | 1964-05-20 | 1967-02-15 | Hoskuld Olav Schancke Hanssen | A method and means for prestressing a concrete structure |
| CN101509385A (en) * | 2009-03-24 | 2009-08-19 | 中煤第五建设公司矿业分公司 | Cable stretching jack releasing device |
| CN202228093U (en) * | 2011-09-06 | 2012-05-23 | 焦作煤业集团赵固（新乡）能源有限责任公司 | Portable anchor wire withdrawing device |
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| CN102704691A (en) | 2012-10-03 |
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