CN203741730U - T-shaped bridge reinforcing structure - Google Patents
T-shaped bridge reinforcing structure Download PDFInfo
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- CN203741730U CN203741730U CN201320841581.2U CN201320841581U CN203741730U CN 203741730 U CN203741730 U CN 203741730U CN 201320841581 U CN201320841581 U CN 201320841581U CN 203741730 U CN203741730 U CN 203741730U
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Abstract
The utility model relates to a T-shaped bridge reinforcing structure. The T-shaped bridge reinforcing structure is characterized in that the outer side of a T-shaped bridge web is wrapped with carbon fiber cloth; encased steel plates are arranged between a wing plate and the web, the one end of each encased steel plate is connected with the wing plate through an expansion bolt, the other end of each encased steel plate is connected with the web through a transverse screw rod, and every two adjacent encased steel plates are fixed to the bottom of the wing plate by means of a flange splice plate and an expansion bolt after being spliced; haunching plates are arranged at the joint of the wing plate and the web and in the encased steel plates in a pouring mode; the top surface of a bridge is provided with a water-proof layer, and a new surface layer is laid on the upper surface of the water-proof layer. The T-shaped bridge reinforcing structure can greatly improve the bearing capacity and crack resistance of an old bridge, reinforcing construction speed is increased, haunching plate templates are supported and arranged conveniently, influence on use of the bridge is small, and good technical and economical benefits are achieved.
Description
Technical field
The utility model relates to a kind of T shape bridge strengthening structure, and particularly a kind of lateral ties deficiency of bridge need to improve the horizontal connection of bridge and the situation of integral rigidity.Belong to bridge engineering field, be applicable to the T shape bridge strengthening of Lack of support.
Background technology
T shape bridge is widely used a kind of bridge type in China's beam bridge, have simple in structure, the advantage of easy construction, in forming, highway in China traffic occupies very important status, because early stage bridge standard of building is on the low side, and along with expanding economy, the traffic volume increases, load-carrying grade changes, add the deficiency of management and maintenance, the reasons such as bridge durability is poor and year for a long time aging, reinforced concrete T-beam bridge appearance Lack of support, the infiltration of hinge seam, beam body in various degree occurs that crack, concrete the problem such as peel off.Yet abolish these old bridges and rebuild new bridge, need on the one hand consumption huge fund, need on the other hand to suspend traffic, affect people and work normally, live.Therefore, the Technology Bridge Strengthening of exploration safety, economy, science has positive realistic meaning.
Tee girder bridge reinforcement means mainly contains the reinforcing techniques such as enlarging section method, carbon cloth reinforced method, external prestressing strengthening method at present.Reinforcement method of enlarging section, takes to increase the section area of concrete structure or structure, to improve its bearing capacity and to meet the normal a kind of reinforcement means using, is a kind of the most common reinforcement means.But the method construction need to be passed through the construction sequences such as formwork, concreting and maintenance, exists the reinforcing cycle longer, the defect that concrete use amount is larger.It is the carbon fibre fabric that same direction is arranged that carbon fiber (CFRP) is reinforced, and is closely pasted on concrete structural surface at normal temperatures by epoxide-resin glue, and the two is jointly stressed as a new integral body.Carbon fiber reinforcement can be issued in the situation that does not increase the loading of works the object of efficient reinforcing, also has the advantages such as chemical resistance, is a kind of very simple and good reinforcement and strengthening method.But this reinforcing mode can not and improve functional performance and play obvious effect the restriction of reinforced T-beam bridge crack.Prestressing is to adopt additional prestress steel pull bar or shaped steel strut to structural element or whole method of reinforcing, by at the external laying pull bar of T ellbeam or strut, and together with the beam body anchor connection being reinforced, then apply prestressing force, the pull bar or the strut that after forcing, add are stressed, thereby the internal force that changes original structure distributes, and reduces the stress level of original structure, to improve the bearing capacity of structure.Prestressing has triple effects of reinforcing, off-load, change structure internal force, is applicable to large-span structure and reinforces, and can reduce the distortion of structure after reinforcing, dwindles crack width and even makes crack completely closed.For RC T ellbeam bridge, adopt the reinforcing that tensile region is applied to precharge pressure, can offset part selfweight stress, play unloading effect, thereby can improve greatly the supporting capacity of T ellbeam.But prestressed reinforcement member is arranged in beyond cross section, anti-corrosion protection measure is difficulty comparatively, and anchoring and turn-around zone easily produce prestressing force and concentrate, and local stress is large, and anchoring construction is required to high defect.
In sum, old bridge is owing to being subject to impact and the limitation of the aspects such as design at that time, material, construction, oneself is not through adapting to the rapid growth of the traffic volume a few days ago, for solving the existing situation of old bridge, need at present a kind of bearing capacity that can increase substantially old beam of invention and crack resistance, short construction period, the tee girder bridge ruggedized construction little to traffic impact badly.
Summary of the invention
The purpose of this utility model is to provide a kind of supporting capacity and anti-crack ability that increases substantially old beam, short construction period, the T shape bridge strengthening structure little to traffic impact.
In order to realize above-mentioned technical purpose, the utility model has adopted following technical scheme:
A T shape bridge strengthening structure, in T shape bridge web outside carbon coated cloth; Between wing plate and web, encased steel plate is set, encased steel plate two ends are connected with web with wing plate with transverse screw by expansion bolt respectively, are fixed on the bottom of wing plate after adjacent encased steel plate amalgamation by edge of a wing scab and expansion bolt; In wing plate and web junction, encased steel plate, haunched slab is set; Bridge end face arranges waterproofing course, and waterproofing course upper surface is laid new surface layer.
The quantity of expansion bolt and transverse screw is more than one.
Haunched slab cross section is triangular in shape, before cast, by drawing the method for hole bar planting, implants anchor bar respectively at wing plate and web.
Encased steel plate and haunched slab pass through reinforcement by connection.
The utlity model has following feature and beneficial effect:
(1) the utility model is coated and has more high-tensile carbon fiber in web periphery, improves supporting capacity and the crack resistance of old beam.
(2) at the haunched slab of web and wing plate junction fluid concrete material, strengthen the shear strength of wing plate and web junction, and and wing plate, web between implant the bonding strength that anchor bar has been strengthened haunched slab and former bridge construction.
(3) between tee girder bridge listrium and web, the interval, outside of haunched slab arranges encased steel plate, improves bonding strength and the integral rigidity of whole tee girder bridge, the formwork difficulty while simultaneously having reduced to build haunched slab concrete.
(4) after reinforcing, upper surface is carried out to damaged face and cut, and waterproof roll and new surface layer are set, strengthened waterproof effect and the planeness of T shape bridge.
(5) the utility model footing is mainly at the following position of bridge wing plate, and work progress is little on the use impact of T shape bridge.
Accompanying drawing explanation
Fig. 1 is the utility model T shape bridge strengthening structural representation.
In figure: 1-T shape bridge wing plate, 2-T shape bridge web, 3-encased steel plate, 4-haunched slab, 5-carbon cloth, 6-expansion bolt, 7-expansion bolt hold-down nut, 8-transverse screw, 9-transverse screw hold-down nut, 10-edge of a wing scab, 11-waterproof roll, the new surface layer of 12-, 13-anchor bar, 14-connecting reinforcement.
The specific embodiment
In the present embodiment such as the method for implantation of haunched slab anchor bar, concrete pouring construction method, new surface layer pouring construction method, be not repeated, specifically set forth the embodiment that the utility model relates to structure.
Fig. 1 is the utility model reinforced T-beam bridge ruggedized construction schematic diagram.Shown in Fig. 1, the wing plate 1 of the T shape bridge that the utility model will be reinforced is of a size of 1600 * 150mm, and web 2 is of a size of 180 * 1200mm, and ruggedized construction is mainly comprised of encased steel plate 3, haunched slab 4, carbon cloth 5.
T shape bridge web 2 periphery carbon coated cloth 5, carbon cloth 5 is PAN base carbon fibre cloth, thickness 2mm, intensity rank is high-strength I level, tensile strength is 4900 MPa, modulus of elasticity >=240GPa, elongation per unit length 2.0%, carbon cloth landing edge overlap joint 120mm.
Before encased steel plate 3 is installed, first on wing plate and web, the position of design cast haunched slab 4 draws hole and implants horizontal and vertical implantation anchor bar 13, anchor bar adopts HRB335 indented bars.
Then, between T shape bridge wing plate 1 and T shape bridge web 2, encased steel plate 3 is set, encased steel plate 3 thickness are 20mm, width is 200mm, adopts the steel plate that strength grade is Q345 to make, default screw limiting hole, two ends and expansion bolt spacing hole, aperture is compared with screw rod 2 and the large 5mm of expansion bolt 7 external diameter, encased steel plate 3, with haunched slab 4 contact portions, spacing hole being set, arranges connecting reinforcement 14 in spacing hole, connecting reinforcement 14 is fixed by being arranged on the nut of encased steel plate 3 both sides.
Encased steel plate 3 is fixing by 2 ~ 3 row's expansion bolts 6 with T shape bridge wing plate 1 contact surface, expansion bolt 6 employing performance rates are the expansion bolt of 4.6 grades, material nominal tensile strength reaches 400MPa, yield tensile ratio value is 0.6, nominal yield strength reaches 240Mpa, and expansion bolt one end is fastening with expansion bolt hold-down nut; Encased steel plate 3 is connected by 2 ~ 3 row's transverse screws 8 with T shape bridge web 2, on tee girder bridge web 2, arrange and draw hole, aperture is compared with the about 3 ~ 5mm of transverse screw 8 diameter, and transverse screw 8 runs through the encased steel plate 3 of T shape bridge web 2 both sides simultaneously, and fastening by transverse screw hold-down nut.
Finally, at T shape bridge wing plate 1 with in tee girder bridge web 2 junctions, build haunched slab 4, haunched slab 4 is triangular in shape, adopts C40 concreting to form.
Two adjacent T shape bridge encased steel plate 3 mosaics are fixed on wing plate bottom by edge of a wing scab 10, expansion bolt, and edge of a wing scab 10 adopts the steel of Q235 to make, and thickness is 20mm ~ 30mm.
After the bridge strengthening of T shape completes, bridge top cuts former breakable layer, laying water-proof coiled material 11, waterproof roll 11 adopts SBS modified asphalt waterproof coiled material, that to take polyester felt or Chopped Strand Mat be tire base, s-B-S (SBS) thermoplastic elastomer (TPE) is made modifier, and two sides is coated with the made building waterproof coil of isolated material; On waterproof roll 11, again build new surface layer 12, new surface layer 12 adopts C40 concreting.
Claims (4)
1. a T shape bridge strengthening structure, is characterized in that in T shape bridge web outside carbon coated cloth; Between wing plate and web, encased steel plate is set, encased steel plate two ends are connected with web with wing plate with transverse screw by expansion bolt respectively, are fixed on the bottom of wing plate after adjacent encased steel plate amalgamation by edge of a wing scab and expansion bolt; Cast haunched slab in wing plate and web junction, encased steel plate; Bridge end face arranges waterproofing course, and waterproofing course upper surface is laid new surface layer.
2. T shape bridge strengthening structure according to claim 1, the quantity that it is characterized in that expansion bolt and transverse screw is more than one.
3. T shape bridge strengthening structure according to claim 1, is characterized in that haunched slab implants anchor bar at wing plate and web respectively by drawing the method for hole bar planting before cast.
4. T shape bridge strengthening structure according to claim 1, is characterized in that encased steel plate and haunched slab reinforce by connecting reinforcement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320841581.2U CN203741730U (en) | 2013-12-20 | 2013-12-20 | T-shaped bridge reinforcing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320841581.2U CN203741730U (en) | 2013-12-20 | 2013-12-20 | T-shaped bridge reinforcing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203741730U true CN203741730U (en) | 2014-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320841581.2U Expired - Fee Related CN203741730U (en) | 2013-12-20 | 2013-12-20 | T-shaped bridge reinforcing structure |
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| CN (1) | CN203741730U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104846753A (en) * | 2015-05-28 | 2015-08-19 | 大连市市政设计研究院有限责任公司 | Bridge deck opening maintaining method |
| CN107143151A (en) * | 2017-06-30 | 2017-09-08 | 唐山钢铁集团有限责任公司 | A kind of architectural engineering Vierendeel girder bracing means |
| CN107268461A (en) * | 2017-08-24 | 2017-10-20 | 中建五局土木工程有限公司 | The reinforcement means and ruggedized construction of a kind of existing elevated bridge |
| CN107869113A (en) * | 2017-10-31 | 2018-04-03 | 南京林业大学 | A kind of box beam that strengthens is encorbelmented the method for flange structural rigidity |
| CN107916625A (en) * | 2017-12-25 | 2018-04-17 | 山西省交通规划勘察设计院 | A kind of widening structure and its method of width cantilever boxgirder |
| CN109235224A (en) * | 2018-09-10 | 2019-01-18 | 中建路桥集团第六工程有限公司 | A kind of prestressed concrete continuous beam |
| CN109594484A (en) * | 2017-09-30 | 2019-04-09 | 郑州市交通规划勘察设计研究院 | Bridge strengthening device, ruggedized construction, reinforced construction method and reinforcement and repair method |
-
2013
- 2013-12-20 CN CN201320841581.2U patent/CN203741730U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104846753A (en) * | 2015-05-28 | 2015-08-19 | 大连市市政设计研究院有限责任公司 | Bridge deck opening maintaining method |
| CN107143151A (en) * | 2017-06-30 | 2017-09-08 | 唐山钢铁集团有限责任公司 | A kind of architectural engineering Vierendeel girder bracing means |
| CN107268461A (en) * | 2017-08-24 | 2017-10-20 | 中建五局土木工程有限公司 | The reinforcement means and ruggedized construction of a kind of existing elevated bridge |
| CN109594484A (en) * | 2017-09-30 | 2019-04-09 | 郑州市交通规划勘察设计研究院 | Bridge strengthening device, ruggedized construction, reinforced construction method and reinforcement and repair method |
| CN107869113A (en) * | 2017-10-31 | 2018-04-03 | 南京林业大学 | A kind of box beam that strengthens is encorbelmented the method for flange structural rigidity |
| CN107916625A (en) * | 2017-12-25 | 2018-04-17 | 山西省交通规划勘察设计院 | A kind of widening structure and its method of width cantilever boxgirder |
| CN109235224A (en) * | 2018-09-10 | 2019-01-18 | 中建路桥集团第六工程有限公司 | A kind of prestressed concrete continuous beam |
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Effective date of registration: 20170417 Granted publication date: 20140730 |
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Date of cancellation: 20200417 Granted publication date: 20140730 |
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| CF01 | Termination of patent right due to non-payment of annual fee |