CN110055907B - Concrete simply supported hollow slab beam carrying reinforcing structure - Google Patents
Concrete simply supported hollow slab beam carrying reinforcing structure Download PDFInfo
- Publication number
- CN110055907B CN110055907B CN201910383922.8A CN201910383922A CN110055907B CN 110055907 B CN110055907 B CN 110055907B CN 201910383922 A CN201910383922 A CN 201910383922A CN 110055907 B CN110055907 B CN 110055907B
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- hollow slab
- joist
- slab beam
- bridge
- simply supported
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- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 26
- 239000004567 concrete Substances 0.000 title claims abstract description 16
- 230000000149 penetrating effect Effects 0.000 claims description 11
- 210000002435 tendon Anatomy 0.000 claims description 8
- 238000004873 anchoring Methods 0.000 claims description 5
- 239000010410 layer Substances 0.000 claims description 5
- 239000012790 adhesive layer Substances 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 12
- 238000005452 bending Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 230000002787 reinforcement Effects 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000338 in vitro Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000011374 ultra-high-performance concrete Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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 invention relates to the technical field of bridge reinforcing structures, in particular to a concrete simply supported hollow slab beam lifting reinforcing structure. Comprises a plurality of joists which are arranged at intervals along the transverse bridge direction; the joists are bearing structures anchored on the lower end face of the hollow slab beam through anchor structures, and are arranged along the bridge direction. The reinforcing structure can well reinforce the old hollow plate girder, improves the bending resistance of the hollow plate girder, has simple structure, convenient construction and good universality, and has great popularization value.
Description
Technical Field
The invention relates to the technical field of bridge reinforcing structures, in particular to a concrete simply supported hollow slab beam lifting reinforcing structure. .
Background
The prefabricated hollow slab bridge has the advantages of simple process, low cost, convenient construction, high standardization degree and the like, is widely applied to the field of bridge engineering, particularly to bridges with medium and small spans, and has absolute advantages in the number proportion of the bridges. Along with the increase of service life, the hollow slab may have insufficient bearing capacity such as bending resistance, shearing resistance and the like due to design, construction, management, maintenance and the like, so that the safety and durability of the bridge are seriously affected, and the lifting reinforcement is needed to carry out comprehensive treatment. For the hollow slab with good self-state, along with the rapid development of economy, the load and road use condition of the original design are mostly faced with the situation of carrying and even dismantling reconstruction under the condition that the existing traffic demand and road planning are not met.
Demolishing and rebuilding the hollow slab with good state can cause waste of resources such as manpower, material resources and financial resources and cause long-term traffic interruption; a large amount of demolishd can also cause environmental pollution.
For carrying reinforcement, the conventional bridge carrying reinforcement method at present mainly comprises a method for increasing the section and reinforcing bars, a method for pasting reinforcing bars, steel plates and carbon fibers, a method for reinforcing a structure stress system, an in-vitro prestress reinforcement method and the like. Because the hollow slab beams are mutually adjacent, the possibility of reinforcing the side faces of the webs is limited, the main reinforcing space is at the bottom of the beam, such as a steel plate or a carbon fiber material is pasted on a bottom plate, and the bottom plate is prestressed and the like, but the hollow slab beams can be mainly treated for a certain disease, and the reinforcing effect is limited, the construction process is complex, and the difficulty is high. .
Disclosure of Invention
The invention aims to solve the defects of the background technology and provides a lifting and reinforcing structure of a concrete simply supported hollow slab beam.
The technical scheme of the invention is as follows: the utility model provides a concrete simply supported hollow slab roof beam carries reinforced structure which characterized in that: comprises a plurality of joists which are arranged at intervals along the transverse bridge direction; the joist is a bearing structure anchored on the lower end surface of the hollow slab beam through an anchoring structure, the joist is arranged along the bridge direction,
the anchoring structure further comprises a pull rod vertically penetrating through the hollow slab beam; the upper end of the pull rod is fixed at the upper end of the hollow slab beam through the anchor plate assembly, and the lower end of the pull rod penetrates through the joist and is fixedly connected with the joist.
The pull rod is of a vertical rod-shaped structure vertically penetrating through a hinge joint between adjacent hollow plates on the hollow plate beam.
The joist further comprises a plurality of joist unit elements which are connected end to form a bearing structure for supporting the hollow slab beam.
The joist unit element is further provided with a prestress hole which is communicated along the forward bridge direction; and prestressed tendons are arranged in the prestressed holes in a penetrating way, and adjacent joist single elements are connected into a whole through the prestressed tendons.
At least two prestressed tendons are arranged on the joist unit elements, and the two prestressed tendons are symmetrically arranged on two sides of a transverse bridge of the pull rod by taking the pull rod penetrating through the joist unit elements as a center.
Further, a boss protruding outwards along the forward bridge is arranged at one end of the joist unit element along the forward bridge, a clamping groove corresponding to the boss and recessed inwards along the forward bridge is arranged at the other end of the joist unit element along the forward bridge, and adjacent joist unit elements are fixedly connected into a whole in the clamping groove through the clamping of the boss.
The hollow slab beam further comprises an adhesive layer adhered to the lower end face of the hollow slab beam and the upper end face of the joist.
The lower end face of the hollow slab beam is further provided with a plurality of first shear grooves which are arranged at intervals along the forward bridge direction, and the upper end face of the joist is provided with a plurality of second shear grooves which are arranged at intervals along the forward bridge direction; the bonding layer is filled in the first shear groove, the second shear groove and the gap between the hollow slab beam and the joist.
Further, the first shear grooves and the second shear grooves are staggered and are not overlapped in the vertical direction.
The invention has the advantages that: 1. by additionally arranging the joist on the lower end face of the hollow slab beam, the bending resistance of the hollow slab beam can be effectively improved;
2. the joist is newly added at the bottom of the old hollow slab beam, so that the original bridge structure can be fully utilized, and the comprehensive economic cost is low;
3. the joist is a standard segment prefabricated in a factory-like segment mode, the quality is reliable, the construction site only needs assembly type splicing construction, the site construction links are few, the construction is convenient and quick, and the efficiency is high;
4. the joist single elements with different numbers and lengths can be assembled into different span structures of 10m, 13m, 16m, 20m and the like, so that standardized construction can be realized, and the universality is greatly enhanced;
5. the joist adopts UHPC and other high-strength materials, so that the mechanical properties of the materials are better utilized and exerted;
6. after reinforcement, the bearing capacity of the old bridge is improved, so that the old bridge can meet the load of the current standard specification, a large amount of demolition construction caused by the fact that the hollow slab beam in the reconstruction and expansion engineering does not meet the requirements of the new standard specification is avoided, social resources are saved, and environmental pollution is reduced.
The reinforcing structure can well reinforce the old hollow plate girder, improves the bending resistance of the hollow plate girder, has simple structure, convenient construction and good universality, and has great popularization value.
Drawings
Fig. 1: the invention provides a cross section structure schematic diagram of a load-carrying reinforcing structure;
fig. 2: the A-A view of fig. 1 of the present invention;
fig. 3: the joist unit structure of the invention is schematically shown;
fig. 4: the joist unit component assembly structure of the invention is schematically shown;
fig. 5: the invention provides a construction structure schematic diagram of a lifting reinforcing structure;
wherein: 1-a hollow slab beam; 1.1—a first shear groove;
2-joists; 2.1—joist unit cell; 2.2-prestressing holes; 2.3-a boss; 2.4-a clamping groove; 2.5-a second shear groove; 3-a pull rod; 4-an anchor plate assembly; 5-prestress rib; 6-a bonding layer; 7, anchor rod; 8-a pull rod sleeve; 9-pull-down rod sleeve.
Description of the embodiments
The invention will now be described in further detail with reference to the drawings and to specific examples.
The carrying reinforcing structure of the embodiment is used for old hollow plate beams, the bending resistance of the hollow plate beams 1 is improved by arranging a plurality of joists 2 which are arranged at intervals along the transverse bridge direction on the lower end face of the hollow plate beams 1, the joists 2 are arranged along the forward bridge direction, and two ends of the forward bridge direction of the joists 2 are respectively fixed on the supports of two adjacent piers.
As shown in fig. 3 to 4, the joist 2 of the present embodiment includes a plurality of joist unit members 2.1, and the plurality of joist unit members 2.1 are connected end to form a bearing structure for supporting the hollow slab beam 1. The length of the entire joist 2 can be adjusted by varying the number of joist unit members 2.1.
In order to facilitate assembly of the joist unit elements 2.1, in this embodiment, clamping groove structures are arranged at two ends of the joist unit elements 2.1, as shown in fig. 3-4, bosses 2.3 protruding outwards along the forward bridge are arranged at one end of the joist unit elements 2.1 along the forward bridge, clamping grooves 2.4 corresponding to the bosses 2.3 and recessed inwards along the forward bridge are arranged at the other end of the forward bridge, and adjacent joist unit elements 2.1 are clamped in the clamping grooves 2.4 through the bosses 2.3 and are fixedly connected into a whole through adhesive cement.
In addition, in order to completely fix the joist unit elements 2.1 together in this embodiment, the joist unit elements 2.1 are provided with prestressed holes 2.2 penetrating along the forward bridge direction, the prestressed ribs 5 are penetrated in the prestressed holes 2.2, and the adjacent joist unit elements 2.1 are connected into a whole through the prestressed ribs 5. When in installation, the joist unit elements 2.1 are connected in series to form an integral structure through the prestress ribs 5 penetrating through the prestress holes 2.2.
The joist 2 of the present embodiment is anchored to the lower end face of the hollow slab beam 1 by an anchor structure. As shown in fig. 1-2 and 5, the anchoring structure comprises a pull rod 3 vertically penetrating through a hollow slab beam 1, the upper end of the pull rod 3 is fixed at the upper end of the hollow slab beam 1 through an anchor plate assembly 4, the anchor plate assembly 4 is anchored at the upper end face of the hollow slab beam 1 through an anchor rod 7, the upper end of the pull rod 3 is fixedly connected with the anchor plate assembly 4 through an upper pull rod sleeve 8, and the lower end of the pull rod 3 penetrates through a joist 2 and is fixedly connected with the joist 2 through a lower pull rod sleeve 9.
When the pull rod 3 of the embodiment is installed, concrete in hinge joints between adjacent hollow plates on the hollow plate girder 1 needs to be chiseled in advance, then the pull rod 3 is installed, namely the pull rod 3 is positioned in the hinge joints, the anchor rod assembly 4 is fixed on the two adjacent hollow plates, the corresponding joists 2 are fixed on the two adjacent hollow plates, and transverse bridges of each hollow plate are respectively fixed on the two joists 2 towards two sides.
In the embodiment, at least two prestressed tendons 5 are arranged on the joist unit element 2.1, and the two prestressed tendons 5 are symmetrically arranged on two sides of a transverse bridge of the pull rod 3 by taking the pull rod 3 penetrating through the joist unit element 2.1 as a center. Such arrangement structure atress is more reasonable, and the structure is more stable.
In actual installation, the joist 2 needs to be fixed on the lower end face of the hollow slab beam 1, as shown in fig. 1-2, and in this embodiment, an adhesive layer 6 is arranged on the lower end face of the hollow slab beam 1 and the upper end face of the joist 2. The bonding layer 6 in this embodiment is an adhesive structure formed by an adhesive, and the adhesive used is a material which has strong fluidity, good adhesion and mechanical properties not lower than those of the original bridge, and can level the bottom surface of the original joist and effectively bond the joist and the original beam structure.
As shown in fig. 2, in order to improve the bonding effect, in this embodiment, a plurality of first shear grooves 1.1 are formed on the lower end surface of the hollow slab beam 1 and are arranged at intervals along the forward bridge direction, a plurality of second shear grooves 2.5 are formed on the upper end surface of the joist 2 and are arranged at intervals along the forward bridge direction, and the bonding layer 6 is filled in the first shear grooves 1.1, the second shear grooves 2.5 and the gaps between the hollow slab beam 1 and the joist 2. The first shear grooves 1.1 and the second shear grooves 2.5 are staggered and do not coincide in the vertical direction. As shown in fig. 2, the arrangement of the shear grooves increases the adhesive bonding area on the one hand and improves the shear resistance of the adhesive layer on the other hand.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The utility model provides a concrete simply supported hollow slab roof beam carries reinforced structure which characterized in that: comprises a plurality of joists (2) which are arranged at intervals along the transverse bridge direction; the joist (2) is a bearing structure anchored on the lower end face of the hollow slab beam (1) through an anchoring structure, the joist (2) is arranged along the forward direction of the bridge, and two ends of the forward direction of the bridge are respectively fixed on two adjacent piers;
the anchoring structure comprises a pull rod (3) vertically penetrating through the hollow slab beam (1); the upper end of the pull rod (3) is fixed at the upper end of the hollow slab beam (1) through the anchor plate assembly (4), and the lower end of the pull rod penetrates through the joist (2) to be fixedly connected with the joist (2).
2. The concrete simply supported hollow slab beam lifting and reinforcing structure as defined in claim 1, wherein: the pull rod (3) is of a vertical rod-shaped structure vertically penetrating through a hinge joint between adjacent hollow plates on the hollow plate beam (1).
3. The concrete simply supported hollow slab beam lifting and reinforcing structure according to any one of claims 1-2, wherein: the joist (2) comprises a plurality of joist unit elements (2.1), and the joist unit elements (2.1) are connected end to form a bearing structure for supporting the hollow slab beam (1).
4. A concrete simply supported hollow slab beam load-carrying reinforcing structure as defined in claim 3, wherein: the joist unit element (2.1) is provided with a prestress hole (2.2) which is communicated along the forward bridge direction; the prestress hole (2.2) is internally provided with a prestress rib (5), and adjacent joist single elements (2.1) are connected into a whole through the prestress rib (5).
5. The concrete simply supported hollow slab beam lifting and reinforcing structure as defined in claim 4, wherein: at least two prestressed tendons (5) are arranged on the joist unit element (2.1), and the two prestressed tendons (5) are symmetrically arranged on two sides of a transverse bridge of the pull rod (3) by taking the pull rod (3) penetrating through the joist unit element (2.1) as a center.
6. The concrete simply supported hollow slab beam lifting and reinforcing structure according to any one of claims 4-5, wherein: the joist unit elements (2.1) are provided with boss (2.3) protruding outwards along the bridge to one end, and draw-in groove (2.4) corresponding to boss (2.3) along inwards sunken along the bridge is provided with to the other end along the bridge, and adjacent joist unit elements (2.1) are fixedly connected into a whole in draw-in groove (2.4) through boss (2.3) block.
7. The concrete simply supported hollow slab beam lifting and reinforcing structure as defined in claim 1, wherein: the hollow slab beam further comprises an adhesive layer (6) adhered to the lower end face of the hollow slab beam (1) and the upper end face of the joist (2).
8. The concrete simply supported hollow slab beam lifting and reinforcing structure as defined in claim 7, wherein: the lower end face of the hollow slab beam (1) is provided with a plurality of first shear grooves (1.1) which are arranged at intervals along the forward direction of the bridge, and the upper end face of the joist (2) is provided with a plurality of second shear grooves (2.5) which are arranged at intervals along the forward direction of the bridge; the bonding layer (6) is filled in the first shear groove (1.1), the second shear groove (2.5) and the gap between the hollow slab beam (1) and the joist (2).
9. The concrete simply supported hollow slab beam lifting and reinforcing structure as defined in claim 8, wherein: the first shear grooves (1.1) and the second shear grooves (2.5) are staggered and do not coincide in the vertical direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910383922.8A CN110055907B (en) | 2019-05-08 | 2019-05-08 | Concrete simply supported hollow slab beam carrying reinforcing structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910383922.8A CN110055907B (en) | 2019-05-08 | 2019-05-08 | Concrete simply supported hollow slab beam carrying reinforcing structure |
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| CN110055907A CN110055907A (en) | 2019-07-26 |
| CN110055907B true CN110055907B (en) | 2024-03-22 |
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| CN201910383922.8A Active CN110055907B (en) | 2019-05-08 | 2019-05-08 | Concrete simply supported hollow slab beam carrying reinforcing structure |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112681156A (en) * | 2020-12-24 | 2021-04-20 | 湖南大学 | Reinforcing structure and reinforcing construction method of hollow slab beam |
| CN114197335B (en) * | 2021-12-28 | 2024-05-03 | 中交鹭建有限公司 | Construction method of external prestress reinforcing structure of hollow slab beam bridge |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102635060A (en) * | 2012-05-02 | 2012-08-15 | 周劲宇 | Concrete hollow slab bridge reinforced by transverse steel beams |
| CN103046478A (en) * | 2013-01-20 | 2013-04-17 | 青岛理工大学 | Assembled plate girder bridge hinge joint reinforcing opposite-pulling device |
| CN103614975A (en) * | 2013-12-04 | 2014-03-05 | 山东大学 | Shear connector reinforcing method for failed hinge joint of assembly-type hollow slab girder |
| CN203639840U (en) * | 2013-12-29 | 2014-06-11 | 西安公路研究院 | Hollow plate girder reinforcing structure based on steel plate concrete and unbonded prestressing tendons |
| CN205348010U (en) * | 2015-12-16 | 2016-06-29 | 柳州欧维姆工程有限公司 | Pull change of friction formula anchor jib and use device |
| CN106758882A (en) * | 2017-02-16 | 2017-05-31 | 柳州欧维姆工程有限公司 | For the hood type automatic leveling anchor and its method for suspender replacement of CFST Arch Bridge suspender replacement |
| CN108374356A (en) * | 2018-05-10 | 2018-08-07 | 山东交通学院 | A kind of old hollow slab bridge of hinge seam longitudinal prestressing reinforcing single hole constructs and construction method |
| CN108411801A (en) * | 2018-05-10 | 2018-08-17 | 山东交通学院 | One kind reinforcing the old hollow slab bridge construction of single hole and construction method by real abdomen Bars In Poured Concrete Slab |
| CN210238317U (en) * | 2019-05-08 | 2020-04-03 | 中交第二航务工程局有限公司 | Concrete simply supported hollow slab beam carries reinforced structure |
-
2019
- 2019-05-08 CN CN201910383922.8A patent/CN110055907B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102635060A (en) * | 2012-05-02 | 2012-08-15 | 周劲宇 | Concrete hollow slab bridge reinforced by transverse steel beams |
| CN103046478A (en) * | 2013-01-20 | 2013-04-17 | 青岛理工大学 | Assembled plate girder bridge hinge joint reinforcing opposite-pulling device |
| CN103614975A (en) * | 2013-12-04 | 2014-03-05 | 山东大学 | Shear connector reinforcing method for failed hinge joint of assembly-type hollow slab girder |
| CN203639840U (en) * | 2013-12-29 | 2014-06-11 | 西安公路研究院 | Hollow plate girder reinforcing structure based on steel plate concrete and unbonded prestressing tendons |
| CN205348010U (en) * | 2015-12-16 | 2016-06-29 | 柳州欧维姆工程有限公司 | Pull change of friction formula anchor jib and use device |
| CN106758882A (en) * | 2017-02-16 | 2017-05-31 | 柳州欧维姆工程有限公司 | For the hood type automatic leveling anchor and its method for suspender replacement of CFST Arch Bridge suspender replacement |
| CN108374356A (en) * | 2018-05-10 | 2018-08-07 | 山东交通学院 | A kind of old hollow slab bridge of hinge seam longitudinal prestressing reinforcing single hole constructs and construction method |
| CN108411801A (en) * | 2018-05-10 | 2018-08-17 | 山东交通学院 | One kind reinforcing the old hollow slab bridge construction of single hole and construction method by real abdomen Bars In Poured Concrete Slab |
| CN210238317U (en) * | 2019-05-08 | 2020-04-03 | 中交第二航务工程局有限公司 | Concrete simply supported hollow slab beam carries reinforced structure |
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| CN110055907A (en) | 2019-07-26 |
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