CN109356043A - Existing hollow slab girder single slab bearing reinforcing construction and reinforcement means - Google Patents
Existing hollow slab girder single slab bearing reinforcing construction and reinforcement means Download PDFInfo
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- CN109356043A CN109356043A CN201811391265.3A CN201811391265A CN109356043A CN 109356043 A CN109356043 A CN 109356043A CN 201811391265 A CN201811391265 A CN 201811391265A CN 109356043 A CN109356043 A CN 109356043A
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- hollow slab
- slab girder
- seam
- shear resistance
- vertical shear
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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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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention belongs to hollow slab girder reinforcement technique field, a kind of existing hollow slab girder single slab bearing reinforcing construction and reinforcement means are disclosed.Firstly, shear resistance connector insertion beam seam is internal, it is contour with deck-molding, it is evenly arranged in vertical bridge to along beam length, arrangement spacing control is in 30cm or so；Then, hollow slab girder beam seam lower edge is sealed using jointing epoxy resin mortar, sealing height should be no less than 5cm, along vertical bridge to elongated sealing；Then, interior pressure injection epoxy glue is stitched in beam and guarantee to fill full；Finally, after epoxy glue is fully cured, direction across bridge tensioning external prestressing steel beam applies the pretightning force of direction across bridge to each hollow slab girder.The present invention can punish hollow slab girder single slab bearing phenomenon in the case where uninterrupted traffic, not destroying deck paving, have many advantages, such as to punish that clear clear thinking, scheme, arrangement and method for construction, working procedure be less, low cost.
Description
Technical field
The invention belongs to existing hollow slab girder reinforcement technique fields more particularly to a kind of existing hollow slab girder single slab bearing to add
Gu construction and reinforcement means.
Background technique
Hollow slab girder is the prefabricated components of standard, has the advantages that batch production, rapid construction, in bridge construction field
Using relatively wide.Direction across bridge Transfer of Shear is usually sewn on by hinge between hollow slab girder, to realize the transverse distribution of bridge floor load, is made
Vehicle and the effect of other loads can be born between each hollow slab girder jointly.
The hollow slab girder of Earlier designs generallys use shallow hinge seam, that is, the height for cutting with scissors seam is smaller, and cuts with scissors often to have in seam and not set
Set connection reinforcing bar phenomenon.Therefore direction across bridge shear resistant capacity is relatively small, and under overweight vehicle load action, shallow hinge seam can go out
Existing failure by shear causes an other hollow slab girder to be made in same load so that hollow slab girder direction across bridge Transfer of Shear be made to fail
It is sharply increased with lower internal force.Therefore, hollow slab girder is serious Structural defect, influences bridge structure safe.
Conventional hollow slab girder single slab bearing disease usually combines deck paving transformation to carry out.I.e. by existing hollow slab girder
Deck paving and hinge seam in concrete all cut, the concrete or steel fibre of assembling reinforcement net after-pouring high intensity again
Concrete.By reinforcing pave-load layer, enhance the direction across bridge shear resistance between hollow slab girder.Serious person, or even use cored slab
Top surface of the beam and bottom surface correspond to affixing steel plate and with screw rod etc. is upper and lower to clamp what hollow slab girder was reinforced to wearing.Operational procedure is multiple
Miscellaneous, project cost is high, while being affected to bridge deck traffic.Often just using half range close traffic or tunneling boring close traffic
Maintenance effect can be reached.
Summary of the invention
It is an object of the present invention to overcome the deficiencies of the prior art and provide a kind of existing hollow slab girder single slab bearing reinforcing
Construction and reinforcement means, can implement in the case where not influencing bridge deck traffic, by enhancing each hollow plate shear resistance,
Apply pretightning force in direction across bridge simultaneously, enhances the direction across bridge transmitting and bearing capacity of hollow slab girder.
In order to achieve the above objectives, the present invention provides the following technical scheme that
A kind of existing hollow slab girder single slab bearing reinforcing construction, hollow slab girder, cross including existing several laid out in parallel
Bottom, vertical shear resistance connector, epoxy glue are stitched to external prestressing steel strand wires, prestressed anchor, steel screw rod, beam；
Vertical shear resistance connector is inserted perpendicularly into beam seam between the hollow slab girder, height and the beam of insertion stitch height phase
Together, and hinge seam position, distance from bottom beam bottom edge 5cm, diameter and beam slit width are arrived in the top of the vertical shear resistance connector
It spends identical；Epoxy glue is perfused in the beam seam simultaneously and solidifies to wrap up vertical shear resistance connector, and beam stitches bottom jointing；
The transverse steel strand wires are installed on the bottom of hollow slab girder, and its both ends respectively beam anchor in
On prestressed anchor；The transverse steel strand wires lead to integrally to apply transverse to hollow slab girder
Cross that each hollow slab girder is laterally compressed to vertical shear resistance connector, the epoxy glue being perfused in beam seam is vertical between hollow slab girder to increase
Shear resistance and the lateral globality for improving hollow slab girder.
Further, bridge is indulged to interval about 30cm, one of vertical shear resistance connector of insertion.
The present invention also provides a kind of existing hollow slab girder single slab bearing reinforcement means, for existing hollow slab girder single slab bearing
Harm is transformed, and is included the following steps:
(1) width for measuring the beam seam between each hollow slab girder of existing hollow slab girder, carries out the field trash in beam seam
Cleaning；
(2) interval 30cm is inserted into a vertical shear resistance connector into beam seam, and the insertion height of vertical shear resistance connector is answered
Identical as beam seam height, the top of vertical shear resistance connector should arrive at hinge seam position, and the bottom of vertical shear resistance connector should distance
Beam bottom edge 5cm；
(3) bottom jointing is stitched along beam, jointing height is 5cm, and jointing should ensure that filling is closely knit, should be pre- during jointing
Grout nipple is stayed, to facilitate the pressure injection epoxy glue into beam seam；
(4) the pressure injection epoxy glue into beam seam should ensure that epoxy glue filling is full, closely knit, and Ying Jing after the completion of perfusion
Set solidification；
(5) it is implanted into steel screw rod at outermost hollow slab girder outboard web, utilizes steel screw rod anchoring external prestressing
Draw anchoring base, anchoring base should be arranged in pairs in direction across bridge, along bridge to arrangement spacing be 1m；
(6) transverse steel strand wires are installed, tensioning simultaneously anchors, the normal intensity that stretching force is 0.65 times.
Compared with prior art, the beneficial effects of the present invention are:
(1) bridge deck traffic operation is not influenced.
The present invention can realize that hollow slab girder single slab bearing disease is reinforced in the case where bridge floor is open to traffic, can be utmostly
The government pressure for reducing bridge management department and traffic department.The usual unilateral Force punishment of hollow slab girder needs to combine
Deck paving transformation could be solved thoroughly.Influence that big, the construction period is long on bridge deck traffic.Job area of the invention is only hollow
Plate-girder beam bottom is not related to bridge floor and bridge deck traffic.
(2) it is punished using comprehensive method, reinforces clear thinking.The external prestressing that direction across bridge applies effectively increases
Direction across bridge precompression between each cored slab, is conducive to collective effect between each.Increased epoxy glue and vertical shearing resistance connect
Connect device, the significantly more efficient lateral transport that ensure that load.
(3) construction in the present invention or measure are shortcut, and the construction and maintenance time is short, installation is quick, overall
Construction period is shorter.
Detailed description of the invention
Fig. 1 is the schematic cross-sectional view of hollow slab girder single slab bearing reinforcing construction provided in an embodiment of the present invention.
Description of symbols
1- transverse steel strand wires, 2- prestressed anchor, 3- steel screw rod, 4- beam seam bottom, the vertical shearing resistance of 5- connect
Connect device, 6- epoxy glue, 7- hollow slab girder.
Specific embodiment
Technical solution provided by the invention is described further below in conjunction with specific embodiment and its attached drawing.In conjunction under
Face explanation, advantages and features of the invention will be apparent from.
As shown in Figure 1, a kind of existing hollow slab girder single slab bearing reinforcing construction, the sky including existing several laid out in parallel
Core beam 7, transverse steel strand wires 1, prestressed anchor 2, steel screw rod 3, beam seam bottom 4, vertical shear resistance connector 5,
Epoxy glue 6.
Wherein, the vertical shear resistance connector 5 of insertion in the beam seam between hollow slab girder 7, and perfusion epoxy glue 6 and solid in beam seam
Change to wrap up vertical shear resistance connector 5, while beam stitches 4 jointing of bottom.Transverse steel strand wires 1 are installed on hollow slab girder
7 bottom, and its both ends is respectively in beam anchor on prestressed anchor 2.Transverse steel strand wires 1 are to hollow
Plate-girder 7 is whole to apply transverse.By the way that each hollow slab girder 7 is laterally compressed, vertical shear resistance connector 5, beam seam
The epoxy glue 6 of interior perfusion can increase vertical shear resistance between hollow slab girder 7 to improve the lateral globality of hollow slab girder.
In the present invention, epoxy glue 6 can not only wrap up vertical shear resistance connector 5, play antisepsis, while epoxy glue
6 itself bondings and shearing strength with higher can make the work of common transmission force between lateral two neighboring hollow slab girder 7
With.
Further, the diameter of vertical shear resistance connector 5 stitches of same size with beam, and vertical shear resistance connector 5 is inserted perpendicularly into beam
In seam, and the height being inserted into is identical as beam seam height.Steel screw rod can be used can also be using spiral, using its screw thread by phase
It is mutually twisted between adjacent hollow slab girder 7, as used steel screw rod 3 in the present embodiment.Vertical bridge is inserted into together to interval about 30cm
Vertical shear resistance connector 5.
The present invention also provides a kind of existing hollow slab girder single slab bearing reinforcement means, for existing hollow slab girder single slab bearing
Harm is transformed, and is included the following steps:
(1) width for measuring the beam seam between each hollow slab girder of existing hollow slab girder, carries out the field trash in beam seam
Cleaning；
(2) interval 30cm is inserted into a vertical shear resistance connector into beam seam, and the insertion height of vertical shear resistance connector is answered
Identical as beam seam height, the top of vertical shear resistance connector should arrive at hinge seam position, and the bottom of vertical shear resistance connector should distance
Beam bottom edge 5cm；
(3) 4 jointing of bottom is stitched along beam, jointing height is 5cm, and jointing should ensure that filling is closely knit, answer during jointing
Reserved grout nipple, to facilitate the pressure injection epoxy glue into beam seam；
(4) the pressure injection epoxy glue into beam seam should ensure that epoxy glue filling is full, closely knit, and Ying Jing after the completion of perfusion
Set solidification；
(5) it is implanted into steel screw rod 3 at outermost hollow slab girder outboard web, anchors external prestressing using steel screw rod 3
Stretch-draw anchor pedestal, anchoring base should be arranged in pairs in direction across bridge, can also be according to the feelings of calculating along bridge to arranging that spacing is 1m
Spacing is arranged in condition；
(6) transverse steel strand wires 1 are installed, tensioning simultaneously anchors, the normal intensity that stretching force is 0.65 times.Laterally
External prestressing steel strand wires 1 are arranged in hollow slab girder bottom, and beam-ends anchors and (stretch-draw anchor pedestal on stretch-draw anchor pedestal respectively
It is only arranged in pairs, is corresponded to along bridge to external prestressing steel strand wires 1, arrangement spacing is about in outermost hollow slab girder web outside
1m)。
Foregoing description is only the description to present pre-ferred embodiments, is not any restriction to the scope of the invention.Appoint
Any change or modification what those skilled in the art makes according to the technology contents of the disclosure above should all regard
For equivalent effective embodiment, the range of technical solution of the present invention protection is belonged to.
Claims (3)
1. a kind of existing hollow slab girder single slab bearing reinforcing construction, it is characterised in that: the sky including existing several laid out in parallel
Core beam (7), prestressed anchor (2), steel screw rod (3), beam seam bottom (4), vertically resists transverse steel strand wires (1)
Cut connector (5), epoxy glue (6)；
It is inserted perpendicularly into vertical shear resistance connector (5) in beam seam between the hollow slab girder (7), height and beam the seam height of insertion
It is identical, and hinge seam position is arrived at the top of the vertical shear resistance connector, distance from bottom beam bottom edge 5cm, diameter and beam stitch
It is of same size；Epoxy glue (6) are perfused in the beam seam simultaneously and solidify to wrap up vertical shear resistance connector (5), and beam stitches bottom
(4) jointing；
The transverse steel strand wires (1) are installed on the bottom of hollow slab girder (7), and its both ends is respectively in beam anchor
In on prestressed anchor (2)；The transverse steel strand wires (1) are integrally to apply weft element to hollow slab girder (7)
External prestressed, by the way that each hollow slab girder (7) laterally to be compressed to vertical shear resistance connector (5), the interior epoxy glue (6) being perfused of beam seam
To increase vertical shear resistance between hollow slab girder (7) and improve the lateral globality of hollow slab girder.
2. existing hollow slab girder single slab bearing reinforcing construction according to claim 1, it is characterised in that: vertical bridge to interval about
30cm, one of insertion vertical shear resistance connector (5).
3. a kind of existing hollow slab girder single slab bearing reinforcement means is transformed for the harm of existing hollow slab girder single slab bearing,
It is characterized by comprising following steps:
(1) width for measuring the beam seam between each hollow slab girder of existing hollow slab girder, clears up the field trash in beam seam；
(2) interval 30cm is inserted into a vertical shear resistance connector, the insertion height Ying Yuliang of vertical shear resistance connector into beam seam
Seam height is identical, and the top of vertical shear resistance connector should arrive at hinge seam position, and the bottom of vertical shear resistance connector should be apart from beam bottom
Edge 5cm；
(3) bottom jointing is stitched along beam, jointing height is 5cm, and jointing should ensure that filling is closely knit, filling should be reserved during jointing
Mouth is starched, to facilitate the pressure injection epoxy glue into beam seam；
(4) the pressure injection epoxy glue into beam seam should ensure that epoxy glue filling is full, closely knit, and should stand after the completion of being perfused solid
Change；
(5) it is implanted into steel screw rod at outermost hollow slab girder outboard web, anchors external prestressing tensioning anchor using steel screw rod
Gu pedestal, anchoring base should be arranged in pairs in direction across bridge, along bridge to arrangement spacing be 1m；
(6) transverse steel strand wires are installed, tensioning simultaneously anchors, the normal intensity that stretching force is 0.65 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811391265.3A CN109356043A (en) | 2018-11-21 | 2018-11-21 | Existing hollow slab girder single slab bearing reinforcing construction and reinforcement means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811391265.3A CN109356043A (en) | 2018-11-21 | 2018-11-21 | Existing hollow slab girder single slab bearing reinforcing construction and reinforcement means |
Publications (1)
| Publication Number | Publication Date |
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| CN109356043A true CN109356043A (en) | 2019-02-19 |
Family
ID=65338249
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811391265.3A Pending CN109356043A (en) | 2018-11-21 | 2018-11-21 | Existing hollow slab girder single slab bearing reinforcing construction and reinforcement means |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109989359A (en) * | 2019-03-08 | 2019-07-09 | 苏交科集团股份有限公司 | A kind of hollow slab girder reinforcement means and structure |
| CN111827140A (en) * | 2020-06-17 | 2020-10-27 | 天津市交通科学研究院 | Unbonded external transverse prestress reinforced hinge joint cracking damaged plate beam structure and method |
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| JP3754981B1 (en) * | 2005-03-08 | 2006-03-15 | 極東鋼弦コンクリート振興株式会社 | PC cable tension / fixation connection method |
| ES2296843T3 (en) * | 2001-06-15 | 2008-05-01 | Gruppo Centro Nord S.P.A. | MANUFACTURING PROCEDURE OF A PREFABRICATED PLATE OR BEAM MADE OF STANDARD OR PRE-COMPRESSED CONCRETE. |
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-
2018
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| JP3754981B1 (en) * | 2005-03-08 | 2006-03-15 | 極東鋼弦コンクリート振興株式会社 | PC cable tension / fixation connection method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109989359A (en) * | 2019-03-08 | 2019-07-09 | 苏交科集团股份有限公司 | A kind of hollow slab girder reinforcement means and structure |
| CN111827140A (en) * | 2020-06-17 | 2020-10-27 | 天津市交通科学研究院 | Unbonded external transverse prestress reinforced hinge joint cracking damaged plate beam structure and method |
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Application publication date: 20190219 |