CN110184954A - A kind of bridge prestress external tendon method for dismounting - Google Patents
A kind of bridge prestress external tendon method for dismounting Download PDFInfo
- Publication number
- CN110184954A CN110184954A CN201910620200.XA CN201910620200A CN110184954A CN 110184954 A CN110184954 A CN 110184954A CN 201910620200 A CN201910620200 A CN 201910620200A CN 110184954 A CN110184954 A CN 110184954A
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- China
- Prior art keywords
- steel strand
- strand wires
- jack
- dismounting
- external tendon
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The present invention relates to a kind of method for dismounting of bridge prestress external tendon, in demolishing process, first the intermediate plate of fixing end is removed, due to the presence of grip of concrete, it is excessive in order to avoid extracting pressure, by the way of removing intermediate plate by root steel strand wires drawing after single spreading, efficiently avoids situation excessive to anchorage zone pressure when whole beam is extracted and occur, avoid the destruction to anchorage zone；When steel strand wires are pulled out from stretching end, first using the method by the stretched certain length of root, steel strand wires are slided to be detached from the bond stress of concrete, whole beam steel strand wires are pulled out together again later, since steel strand wires have had been detached from the bond stress of concrete at this time, pulling capacity needed for whole beam drawing has been weakened severely at this time, is efficiently avoided excessive to anchorage zone pressure when whole beam is extracted and is damaged to anchorage zone.
Description
Technical field
The present invention relates to bridge prestress fields, more particularly, to a kind of bridge prestress external tendon method for dismounting.
Background technique
Prestressed concrete bridge is also known as prestressed reinforced concrete bridge, the bridge that bridge span structure uses prestressed concrete to build
Beam.This bridge can make concrete in loaded preceding preparatory compression using the counter-force of reinforcing bar or steel wire (rope) pretension.It is runing
Stage does not occur tensile stress (claiming fully prestressed concrete), or has tensile stress and do not occur crack or control critical eigenvalue and allowing width
It is interior.
Intermediate plate anchoring steel strand wires are to be consolidated the steel strand wires one kind onto anchorage that is strained and fixed with intermediate plate at the both ends of steel strand wires
Determine mode, in order to protect prestressing force component (including steel strand wires, anchorage etc.), after the completion of tensioning, generally can in cable guide pipe, it is close
Concrete perfusion in sealed tube plays corrosion-resistant protective effect to steel strand wires and anchorage, has extended service life, while can be in anchor head
Protective cover is put on outside, fill concrete or injection grease, play corrosion-resistant protective effect in protective cover.In some cases,
It needs more to change jobs to the external tendon on bridge, needs first to remove the external tendon being fixed on bridge at this time, by
It is filled with concrete in all filling out in sealing drum and cable guide pipe, concrete and steel strand wires, sealing drum, cable guide pipe form entirety, if
Steel strand wires are pulled out by the way of the extraction of whole beam, due to there is the presence of grip of concrete simultaneously, entire beam tension withdrawal force will be big
It easily causes anchorage zone concrete local stress excessive in the stretching force of former external tendon, withdrawal process and cracks.
Accordingly, it is desirable to provide a kind of new bridge prestress external tendon method for dismounting, it will not be due to pulling out in demolishing process
It contributes excessive and causes that anchorage zone concrete local stress is excessive and cracks.
Summary of the invention
It is an object of the invention to overcome the deficiency of the above-mentioned prior art, a kind of bridge prestress external tendon dismounting side is provided
Method reduces withdrawal force during extracting whole beam steel strand wires, avoids causing anchorage zone concrete since withdrawal force is excessive
The dangerous generation that local stress is excessive and cracks.
The purpose of the present invention is achieved by the following technical programs:
A kind of bridge prestress external tendon method for dismounting, it is described pre- to answer for removing the external prestressed cable on bridge
Power external tendon includes stretching end and fixing end, which comprises the following steps:
S1, the protective cover for removing external tendon both ends, cut the concrete wrapped up on the anchor head at external tendon both ends, make outside anchor head
Dew；
S2, the intermediate plate for removing fixing end:
S21, choose fixing end expose steel strand wires in one, with steel strand connector by tool steel strand wires with it is selected
Steel strand wires connection carry out spreading；
S22, the tool steel strand wires in S21 step are attached fixation across jack, set up support base, the support
Seat one end abuts against on the anchor plate end face of fixing end, and the other end supports the jack；
S23, starting jack, jack is by pulling the tool steel strand wires to pull single steel strand, so that fixing end
Intermediate plate loosening on the steel strand wires is exited, and after removing the intermediate plate, release steel strand wires make steel strand wires bounce back to unstress state, is removed
Tool steel strand wires and steel strand connector；
S24, another steel strand wires for not removing intermediate plate in fixing end are chosen, repeats step S21 to S23；
S25, step S24 is repeated, is removed until by the intermediate plate on all steel strand wires of fixing end；
S3, the bond stress for weakening concrete
S31, choose stretching end expose steel strand wires in one, with steel strand connector by tool steel strand wires with it is selected
Steel strand wires connection carry out spreading；
S32, the tool steel strand wires in S31 step are connected and fixed across jack, set up support base, the support base one
End abuts against on the anchor plate end face of stretching end, and the other end supports the jack；
S33, starting jack, jack are twisted single steel by pulling the tool steel strand wires to pull single steel strand
Line extracts 50cm or more, weakens the bond stress of the concrete on steel strand wires, then discharges steel strand wires to bounce back to steel strand wires unstressed
State removes tool steel strand wires and steel strand connector；
S34, another steel strand wires not being pulled out in stretching end are chosen, repeats step S31 to S33；
S35, step S34 is repeated, is gone over until by all steel strand wires extractions of tensioning；
S4, whole beam steel strand wires are drawn out from stretching end using jack.
Further, after step s4, the sealing drum at external tendon both ends is extracted, the concrete in cable guide pipe is removed.
Preferably, in step sl, the specific method for removing the protective cover at the both ends of external tendon is to be cut to protect with oxygen cutting
Shield makes the exposed concrete in protective cover.
Preferably, in step S33, used jack is 240Q jack, pulling capacity 5-6T.
Preferably, in step S33, it is 60-70cm that single steel strand, which extracts length,.
Preferably, in step s 4, whole beam steel strand wires are drawn out used jack from stretching end with jack is
Punching jack.
Preferably, the steel strand connector in step S21 and step S31 is single steel strand connector.
Preferably, the single steel strand connector includes attaching nut, and the attaching nut left and right ends have
External screw thread, the attaching nut left and right ends are threadedly coupled a single hole anchor slab, two single hole anchor slab bilateral symmetries respectively
It is arranged, a taper hole is provided in each single hole anchor slab, the tool clamping piece for clamping steel strand wires is equipped in the taper hole.
Preferably, step S22 is identical as the clamping support in step S32, the support base include multiple support columns and
Two gasket rings, the both ends of each support column are connect with two gasket rings respectively.
Preferably, in step S22 and step S32, the support base and the jack are directly lined with an anchor slab, described
The through-hole that tool steel strand wires pass through in the anchor slab is connect with the jack.
The invention has the following beneficial effects: the present invention relates to a kind of method for dismounting of bridge prestress external tendon, tearing open
Except in the process, first removing the intermediate plate of fixing end, since the presence of grip of concrete is adopted in order to avoid extraction pressure is excessive
With the mode for removing intermediate plate after single spreading by root steel strand wires drawing, efficiently avoid when whole beam is extracted to anchorage zone pressure mistake
Big situation occurs, and avoids the destruction to anchorage zone；When pulling out steel strand wires from stretching end, first using stretched certain by root
The method of length makes the mobile bond stress to be detached from concrete of steel strand wires, later again pulls out whole beam steel strand wires together, due to this
When steel strand wires had been detached from the bond stress of concrete, pulling capacity needed for whole beam drawing has been weakened severely at this time, effectively
It avoids excessive to anchorage zone pressure when whole beam is extracted and anchorage zone is damaged.
Detailed description of the invention
Fig. 1 for the bridge prestress external tendon to be removed in embodiment structural schematic diagram；
Fig. 2 is the construction schematic diagram in embodiment in fixing end；
Fig. 3 is the construction schematic diagram in embodiment in stretching end；
Fig. 4 is the schematic cross-sectional view of the single steel strand connector in embodiment；
Fig. 5 is the structural schematic diagram of the support base in embodiment.
Specific structure explanation: 1 fixing end, 2 stretching ends, 31 steel strand wires, 32 anchor plates, 33 cable guide pipes, 34 protective covers, 35 close
Sealed tube, 4 support bases, 41 gasket rings, 42 support columns, 5 anchor slabs, 6 jack, 7 steel strand connectors, 71 attaching nuts, 72 single hole anchors
Plate, 721 taper holes, 73 tool clamping pieces, 8 tool steel strand wires.
Specific embodiment
Invention is further described in detail for the embodiment provided with reference to the accompanying drawing.
A kind of bridge prestress external tendon method for dismounting, it is described pre- to answer for removing the external prestressed cable on bridge
Power external tendon includes stretching end 2 and fixing end 1, which comprises the following steps:
S1, the protective cover 34 for removing external tendon both ends, cut the concrete wrapped up on the anchor head at external tendon both ends, make anchor head
It is exposed；
S2, reference Fig. 2, remove the intermediate plate of fixing end 1:
S21, choose fixing end 1 expose steel strand wires 31 in one, with 31 connector of steel strand wires by tool steel strand wires 8 with
The selected connection of steel strand wires 31 carries out spreading；
S22, the tool steel strand wires 73 in S21 step are attached fixation across jack 6, set up support base 4, it is described
4 one end of support base abuts against on 32 end face of anchor plate of fixing end 1, and the other end supports the jack 6；
S23, starting jack 6, jack 6 is by pulling the tool steel strand wires 8 to pull single steel strand 31, so that solid
Intermediate plate loosening on the steel strand wires of fixed end is exited, and when intermediate plate is loosened but do not fallen automatically, can be pulled out intermediate plate with screwdriver, be removed
After the intermediate plate, release steel strand wires 31 make steel strand wires 31 bounce back to unstress state, remove tool steel strand wires 8 and steel strand connector
7；In jack 6 selected by stretching single steel strand, preferably preceding clip type jack,
S24, another steel strand wires 31 for not removing intermediate plate in fixing end 1 are chosen, repeats step S21 to S23；
S25, step S24 is repeated, after removing the intermediate plate on all steel strand wires 31 of fixing end 1, followed the steps below；
S3, reference Fig. 3, weaken the bond stress of concrete
S31, one in the steel strand wires 31 that stretching end exposes is chosen, with steel strand connector 7 by tool steel strand wires 8 and institute
The connection of steel strand wires 31 of selection carries out spreading；
S32, the tool steel strand wires 8 in S31 step are connected and fixed across jack 6, set up support base 4, the support
4 one end of seat abut against on the anchor plate end face of stretching end 2, and the other end supports the jack 6；
S33, starting jack 6, jack 6, will be single by pulling the tool steel strand wires 8 to pull single steel strand 31
Steel strand wires 31 extract 50cm or more, weaken the bond stress of the concrete on steel strand wires 31, then discharging steel strand wires 31 returns steel strand wires
It is reduced to unstress state, removes tool steel strand wires 8 and steel strand connector 7；
S34, another steel strand wires not being pulled out in stretching end are chosen, repeats step S31 to S33；
S35, step S34 is repeated, is gone over until by all steel strand wires extractions of tensioning；
S4, whole beam steel strand wires are drawn out from stretching end using jack.Preferably, use jack will from stretching end herein
It is centre-hole jack that whole beam steel strand wires, which draw out used jack,.
Further, after step s4, the sealing drum 35 at external tendon both ends is extracted, the coagulation in cable guide pipe 33 is removed
Soil.
Preferably, in step sl, the specific method for removing the protective cover at the both ends of external tendon is to be cut to protect with oxygen cutting
Shield makes the exposed concrete in protective cover.Oxygen cutting equipment is simple, flexible and convenient, and is suitable for the big material of cutting thickness,
It is applicable in this present embodiment.
Preferably, in step S33, used jack is 240Q jack, pulling capacity 5-6T.
Preferably, in step S33, it is 60-70cm that single steel strand, which extracts length,.
Preferably, in step s 4, whole beam steel strand wires are drawn out used jack from stretching end with jack is
Punching jack.
Preferably, the steel strand connector 7 in step S21 and step S31 is single steel strand connector.
Preferably, the single steel strand connector includes attaching nut 71,71 left and right ends of the attaching nut difference
It is provided with external screw thread, 71 left and right ends of attaching nut are threadedly coupled a single hole anchor slab 72, two single hole anchor slabs respectively
72 are symmetrical set, and a taper hole 721 is provided in each single hole anchor slab 72, is equipped in the taper hole 721 for clamping steel
The tool clamping piece 73 of twisted wire.In use, attaching nut 71 is removed, steel strand wires 31 and tool steel strand wires 8 pierce into two lists respectively
In the taper hole of hole anchor slab 72, tool clamping piece 73 is put on, is being connected together two single hole anchor slabs 72 using attaching nut 71, is led to
Crossing tension steel strand 31 and tool steel strand wires 8 makes intermediate plate shrink clamping.
Preferably, step S22 is identical as the clamping support in step S32, and the support base 4 includes multiple support columns 42
With two gasket rings 41, the both ends of each support column 42 are connect with two gasket rings 41 respectively.Preferably, support base is made
4 material is steel, and the structure of the support base 4 is simple, and support strength is high, is suitable for the present embodiment.
Preferably, in step S22 and step S32, the support base and the jack are directly lined with an anchor slab 5, institute
Through-hole of the tool steel strand wires in the anchor slab is stated to connect with the jack.Anchor slab 5 is existing tool, and materials facilitate fast
Victory, and intensity is high, the through-hole being provided with originally on anchor slab 5 allows tool steel strand wires to pass through just, is suitable for the present embodiment.
As described above, only presently preferred embodiments of the present invention, when cannot be limited the scope of implementation of the present invention with this,
All still belong to this hair according to simple equivalent changes and modifications made by scope of the present invention patent and invention description content generally
In the range of bright patent covers.
Claims (10)
1. a kind of bridge prestress external tendon method for dismounting, for the external prestressed cable on bridge to be removed, the prestressing force
External tendon includes stretching end and fixing end, which comprises the following steps:
S1, the protective cover for removing external tendon both ends, cut the concrete wrapped up on the anchor head at external tendon both ends, keep anchor head exposed；
S2, the intermediate plate for removing fixing end:
S21, one in the steel strand wires that fixing end is exposed is chosen, with steel strand connector by tool steel strand wires and selected steel
Twisted wire connection carries out spreading；
S22, the tool steel strand wires in S21 step are attached fixation across jack, set up support base, the support base one
End abuts against on the anchor plate end face of fixing end, and the other end supports the jack；
S23, starting jack, jack is by pulling the tool steel strand wires to pull single steel strand, so that the fixing end steel
Intermediate plate loosening on twisted wire is exited, and after removing the intermediate plate, release steel strand wires make steel strand wires bounce back to unstress state, removes tool
Steel strand wires and steel strand connector；
S24, another steel strand wires for not removing intermediate plate in fixing end are chosen, repeats step S21 to S23；
S25, step S24 is repeated, is removed until by the intermediate plate on all steel strand wires of fixing end；
S3, the bond stress for weakening concrete
S31, one in the steel strand wires that stretching end exposes is chosen, with steel strand connector by tool steel strand wires and selected steel
Twisted wire connection carries out spreading；
S32, the tool steel strand wires in S31 step are connected and fixed across jack, set up support base, support base one end top
It is against on the anchor plate end face of stretching end, the other end supports the jack；
S33, starting jack, jack are pulled out single steel strand by pulling the tool steel strand wires to pull single steel strand
50cm or more out weakens the bond stress of the concrete on steel strand wires, then discharging steel strand wires makes steel strand wires bounce back to unstress state,
Remove tool steel strand wires and steel strand connector；
S34, another steel strand wires not being pulled out in stretching end are chosen, repeats step S31 to S33；
S35, step S34 is repeated, is gone over until by all steel strand wires extractions of tensioning；
S4, whole beam steel strand wires are drawn out from stretching end using jack.
2. a kind of bridge prestress external tendon method for dismounting as described in claim 1, it is characterised in that: after step s4,
The sealing drum at external tendon both ends is extracted, the concrete in cable guide pipe is removed.
3. a kind of bridge prestress external tendon method for dismounting as described in claim 1, it is characterised in that: in step sl, tear open
The specific method of the protective cover at the both ends of lower external tendon is to cut protective cover with oxygen cutting, makes the exposed concrete in protective cover.
4. a kind of bridge prestress external tendon method for dismounting as described in claim 1, it is characterised in that: in step S33, adopted
Jack is 240Q jack, pulling capacity 5-6T.
5. a kind of bridge prestress external tendon method for dismounting as claimed in claim 4, it is characterised in that: single in step S33
It is 60-70cm that steel strand wires, which extract length,.
6. a kind of bridge prestress external tendon method for dismounting as described in claim 1, it is characterised in that: in step s 4, use
It is punching jack that whole beam steel strand wires are drawn out used jack from stretching end by jack.
7. a kind of bridge prestress external tendon method for dismounting as described in claim 1, it is characterised in that: step S21 and step
Steel strand connector in S31 is single steel strand connector.
8. a kind of bridge prestress external tendon method for dismounting as claimed in claim 7, it is characterised in that: the single steel strand
Connector includes attaching nut, and the attaching nut left and right ends have external screw thread, the attaching nut left and right ends point
Not Luo Wenlianjie a single hole anchor slab, two single hole anchor slabs are symmetrical set, and are provided with one in each single hole anchor slab
Taper hole, the interior tool clamping piece being equipped with for clamping steel strand wires of the taper hole.
9. a kind of bridge prestress external tendon method for dismounting as described in claim 1, it is characterised in that: step S22 and step
Clamping support in S32 is identical, and the support base includes multiple support columns and two gasket rings, the both ends of each support column
It is connect respectively with two gasket rings.
10. a kind of bridge prestress external tendon method for dismounting as claimed in claim 9, it is characterised in that: in step S22 and step
In rapid S32, the support base and the jack are directly lined with an anchor slab, and the tool steel strand wires pass through logical in the anchor slab
Hole is connect with the jack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910620200.XA CN110184954B (en) | 2019-07-10 | 2019-07-10 | Bridge prestressed body outer cable dismantling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910620200.XA CN110184954B (en) | 2019-07-10 | 2019-07-10 | Bridge prestressed body outer cable dismantling method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110184954A true CN110184954A (en) | 2019-08-30 |
| CN110184954B CN110184954B (en) | 2020-10-02 |
Family
ID=67725673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910620200.XA Active CN110184954B (en) | 2019-07-10 | 2019-07-10 | Bridge prestressed body outer cable dismantling method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110184954B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111188286A (en) * | 2020-01-13 | 2020-05-22 | 上海悍马建筑科技有限公司 | Method for disassembling bonded prestressed carbon fiber plate |
| CN114960482A (en) * | 2022-06-20 | 2022-08-30 | 保利长大工程有限公司 | Method for safely and efficiently removing external prestress |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008095400A (en) * | 2006-10-12 | 2008-04-24 | Zenitaka Corp | Diagonal cable removal method |
| CN104372738A (en) * | 2014-10-30 | 2015-02-25 | 柳州欧维姆机械股份有限公司 | Single-cable-replaceable type anchorage pre-stressed anchor device and installation and cable replacement methods thereof |
| CN104746442A (en) * | 2015-04-17 | 2015-07-01 | 柳州欧维姆工程有限公司 | Steel wire drawing and hole cleaning device assembly for replacing old lifting rod of arched bridge pre-stressed boom and method for dismounting old lifting rod |
| CN108166491A (en) * | 2017-12-06 | 2018-06-15 | 苏州市能工基础工程有限责任公司 | The method for dismounting of steel strand wires in anchor cable |
| CN109736213A (en) * | 2018-12-29 | 2019-05-10 | 柳州欧维姆机械股份有限公司 | For the quick-replaceable tooling of intermediate plate group's anchor formula guy of twisted steel cable and its Demolition Construction method |
-
2019
- 2019-07-10 CN CN201910620200.XA patent/CN110184954B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008095400A (en) * | 2006-10-12 | 2008-04-24 | Zenitaka Corp | Diagonal cable removal method |
| CN104372738A (en) * | 2014-10-30 | 2015-02-25 | 柳州欧维姆机械股份有限公司 | Single-cable-replaceable type anchorage pre-stressed anchor device and installation and cable replacement methods thereof |
| CN104746442A (en) * | 2015-04-17 | 2015-07-01 | 柳州欧维姆工程有限公司 | Steel wire drawing and hole cleaning device assembly for replacing old lifting rod of arched bridge pre-stressed boom and method for dismounting old lifting rod |
| CN108166491A (en) * | 2017-12-06 | 2018-06-15 | 苏州市能工基础工程有限责任公司 | The method for dismounting of steel strand wires in anchor cable |
| CN109736213A (en) * | 2018-12-29 | 2019-05-10 | 柳州欧维姆机械股份有限公司 | For the quick-replaceable tooling of intermediate plate group's anchor formula guy of twisted steel cable and its Demolition Construction method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111188286A (en) * | 2020-01-13 | 2020-05-22 | 上海悍马建筑科技有限公司 | Method for disassembling bonded prestressed carbon fiber plate |
| CN114960482A (en) * | 2022-06-20 | 2022-08-30 | 保利长大工程有限公司 | Method for safely and efficiently removing external prestress |
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| Publication number | Publication date |
|---|---|
| CN110184954B (en) | 2020-10-02 |
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Address after: 510080 20th floor, JIAYE building, 318 Dongfeng Middle Road, Yuexiu District, Guangzhou City, Guangdong Province Patentee after: Guangzhou Beihuan Intelligent Transportation Technology Co.,Ltd. Address before: 510080 20th floor, JIAYE building, 318 Dongfeng Middle Road, Yuexiu District, Guangzhou City, Guangdong Province Patentee before: GUANGZHOU NORTH RING SUPER HIGHWAY Co.,Ltd. |
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