CN210134346U - Ultrahigh-performance bridge deck plate structure - Google Patents
Ultrahigh-performance bridge deck plate structure Download PDFInfo
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- CN210134346U CN210134346U CN201920567912.5U CN201920567912U CN210134346U CN 210134346 U CN210134346 U CN 210134346U CN 201920567912 U CN201920567912 U CN 201920567912U CN 210134346 U CN210134346 U CN 210134346U
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Abstract
The utility model relates to an ultra-high performance bridge deck structure, which comprises a plurality of UHPC precast slabs and a plurality of longitudinal beams which can be spliced mutually; the end parts of the adjacent UHPC precast slabs at the transverse abutted seam are provided with concave mortises; two ends of the UHPC prefabricated plates are lapped on the longitudinal beam, and a longitudinal joint groove is reserved between every two adjacent UHPC prefabricated plates; a plurality of hollow grooves are formed in the UHPC precast slab; a plugging plate is arranged at the communication position of the hollow groove and the mortise or the longitudinal joint groove; the mortises and the longitudinal joint grooves are both poured with joint concrete for connecting adjacent UHPC precast slabs into a whole; a connecting piece is fixed at the upper end of the longitudinal beam in the longitudinal seam splicing groove; after the abutted seam concrete around the connecting piece is solidified, the UHPC precast slabs spliced with each other are fixed on the longitudinal beam; the utility model discloses a decking resistance to plucking that makes, shearing and bending resistance are strong, reduce the UHPC material quantity, and can combine together prefabrication and cast-in-place, can effectively shorten the site operation time.
Description
Technical Field
The utility model belongs to the technical field of civil engineering technique and specifically relates to an ultra-high performance bridge deck structure.
Background
The ultra-high performance concrete (UHPC) is an ultra-high performance fiber reinforced cement composite material with high strength, high modulus and high ductility, and is a novel building material with development prospect in a plurality of ultra-high performance concretes, especially for Reactive Powder Concrete (RPC) in the ultra-high performance concrete. Usually, the compressive strength is not lower than 130MPa, the axial tensile strength is not lower than 8MPa, the tensile capacity can be further enhanced by doping certain volume content of steel fiber and dense reinforcing bars into UHPC, and the bending tensile strength can reach 20-40 MPa or even higher. UHPC also has a relatively high density, a high barrier coefficient, and is substantially resistant to moisture penetration through the UHPC into the bond coat. If UHPC is used to replace the common concrete structure, the phenomena of easy cracking and short service life of the common concrete bridge deck can be avoided, the concrete consumption of the bridge deck can be reduced, and the self weight of the structure can be reduced. However, the ultra-high performance concrete has a high construction cost, and the design of the ultra-high performance concrete is the same as that of the section of common concrete, so that the cost of the bridge is greatly increased. If the ribbed bridge deck is used, the bending rigidity is greatly reduced at the same height as the equal thickness slab.
The Chinese patent with the application number of CN201910062333.X discloses an ultrahigh-performance concrete prefabricated hollow bridge deck with longitudinal and transverse ribs and a construction method thereof, the ultrahigh-performance concrete prefabricated hollow bridge deck with the longitudinal and transverse ribs comprises a top plate, a bottom plate and beam ribs arranged in the middle of the top plate and the bottom plate and intersected vertically and horizontally, the longitudinal beam ribs and the longitudinal beam ribs are intersected to form a hollow structure, common reinforcing steel bar meshes woven by common reinforcing steel bars in a transverse and longitudinal mode are matched in the top plate and the bottom plate, and prestressed reinforcing steel bar meshes woven by prestressed reinforcing steel bars and stirrups are matched in the beam ribs. However, in the actual production process, due to the limitation of the actual transportation capacity, the breadth of the ultra-high performance concrete prefabricated hollow bridge deck slab with the longitudinal and transverse ribs is usually smaller, and along with the continuous increase of the requirement on the width of the bridge deck, the prefabricated bridge deck slab with the small breadth can meet the actual use requirement of bridge deck traffic only by mutually splicing. But the existing bridge deck slab joint is usually only simple concrete pouring, so that the connection strength of the bridge deck slab is low, and the overall stability and safety of the bridge are reduced.
SUMMERY OF THE UTILITY MODEL
In order to solve the above-mentioned problem that prior art exists, the utility model provides an ultra-high performance bridge floor structure, hollow structure's UHPC prefabricated plate can reduce the whole quality of decking, can connect into a whole with the UHPC prefabricated plate and the longeron of concatenation each other, and the decking resistance to plucking that the construction made, shear and shock resistance are strong, and can combine together prefabrication and cast-in-place, can effectively shorten the on-the-spot engineering time.
The technical scheme of the utility model as follows:
an ultra-high performance bridge deck structure comprises a plurality of UHPC precast slabs and a plurality of longitudinal beams, wherein the UHPC precast slabs can be spliced with one another, and the longitudinal beams are arranged at intervals along the width direction of a bridge deck and used for supporting the UHPC precast slabs; the end parts of the adjacent UHPC precast slabs at the transverse abutted seam are provided with concave mortises; two ends of the UHPC prefabricated plates are lapped on the longitudinal beam, and a longitudinal joint groove is reserved between every two adjacent UHPC prefabricated plates; a plurality of hollow grooves for reducing the mass of the bridge deck are arranged in the UHPC precast slab at intervals longitudinally or transversely; a plugging plate for preventing later-poured concrete from entering the hollow groove is arranged at the communication position of the hollow groove and the mortise or the longitudinal joint groove; the mortises and the longitudinal joint grooves are both poured with joint concrete for connecting adjacent UHPC precast slabs into a whole; a connecting piece is fixed at the upper end of the longitudinal beam in the longitudinal seam splicing groove; and after the abutted seam concrete around the connecting piece is solidified, the mutually spliced UHPC precast slabs are fixed on the longitudinal beam.
Further, the connecting piece is at least one inverted U-shaped steel bar; the lower end of the inverted U-shaped steel bar is fixed on the longitudinal beam.
Furthermore, a plurality of anti-shearing reserved grooves are formed in the UHPC prefabricated slab; the shear-resistant preformed groove is positioned above the longitudinal beam; at least one longitudinal joint groove is arranged between every two adjacent shearing-resistant reserved grooves; shear resistant nails used for improving the shear strength of the bridge deck are fixed on the longitudinal beams in the shear resistant reserved grooves; and the shear-resistant concrete is poured in the shear-resistant preformed groove.
Further, the longitudinal section of the shear-resistant preformed groove is trapezoidal; the opening of the shear-resistant preformed groove is gradually reduced from top to bottom, and the bridge deck is clamped on the longitudinal beam from top to bottom after the shear-resistant concrete is solidified.
Furthermore, annular steel bars for improving the connection strength of adjacent UHPC precast slabs are arranged in the mortises and the longitudinal joint grooves; and the annular steel bar part is pre-buried and fixed on the adjacent UHPC precast slabs.
Furthermore, two layers of criss-cross reinforcing steel bar nets for improving the strength of the UHPC precast slab are arranged above and below the inside of the UHPC precast slab.
Further, the lower end parts of the adjacent UHPC precast slabs at the transverse abutted seam are tightly attached; and sealing strips for preventing abutted concrete from leaking are arranged at the positions where the lower ends of the adjacent UHPC precast slabs are tightly attached.
Further, the cross section of the hollow groove is in an oval shape, a rectangular shape or a trapezoidal shape.
Furthermore, the longitudinal beam is an I-shaped steel beam or a groove-shaped steel beam.
The utility model discloses following beneficial effect has:
1. the utility model relates to an ultra-high performance bridge deck structure, the UHPC precast slab of the hollow structure can reduce the whole quality of the bridge deck; after the abutted seam concrete poured in the mortise is solidified, the abutted seam concrete and the mortise of the UHPC precast slab can form a mortise-tenon joint structure, so that the UHPC precast slabs can be effectively connected together; after the abutted seam concrete poured in the longitudinal abutted seam groove is solidified, the UHPC precast slabs connected together can be fixed on the longitudinal beam together with the connecting piece; the bridge deck slab manufactured by construction has strong anti-pulling, anti-shearing and anti-bending capabilities, and can combine prefabrication and cast-in-place, thereby effectively shortening the field construction time.
2. The utility model relates to an ultra-high performance bridge floor structure, vertical piece inslot is provided with down "U" shaped steel muscle and annular reinforcing bar, and piece concrete solidifies back annular reinforcing bar and can make adjacent UHPC prefabricated plate zonulae occludens together, and falls "U" shaped steel bar and can be with the stable fixing of decking that links together on the longeron, and the decking resistance to plucking that the construction made is strong with the ability of shearing, can effectively improve the overall stability and the security of bridge.
3. The utility model relates to an ultra-high performance bridge floor structure, the concrete that shears can be fixed the decking on the longeron with the nail that shears together after solidifying, and the longitudinal section of concrete that shears is trapezoidal, can be with decking from the top down chucking on the longeron after it solidifies, can effectively improve the anti-pulling of decking and the ability of shearing.
4. The utility model relates to an ultra-high performance bridge floor structure is provided with the annular reinforcing bar in the tongue-and-groove, and the piece joint concrete solidifies back annular reinforcing bar and can make adjacent UHPC prefabricated plate zonulae occludens together, and the difficult emergence fracture phenomenon of decking that makes, the security is good.
5. The utility model relates to an ultra-high performance bridge deck structure, the two-layer reinforcing bar net of laying from top to bottom can regard as the skeleton of UHPC prefabricated plate, can effectively improve the compressive strength and the anti deformability of UHPC prefabricated plate.
6. The utility model relates to a super high performance decking structure can be in the same place longeron, connecting piece and the prefabricated welding of nail that shears, and UHPC prefabricated plate can be prefabricated at the mill, can effectively combine prefabricated and cast-in-place dual mode, and reducible site operation time for the construction speed of engineering.
Drawings
Fig. 1 is a schematic structural view of a UHPC prefabricated panel according to a first embodiment of the present invention when mounted on a longitudinal beam;
fig. 2 is a plan view of the UHPC prefabricated panels according to the first embodiment of the present invention after being spliced with each other and spliced concrete and shear concrete are poured;
FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is a schematic view of a portion of the structure of FIG. 3;
FIG. 5 is a schematic cross-sectional view taken along line B-B of FIG. 2;
FIG. 6 is a schematic cross-sectional view taken along line C-C in FIG. 2 when the plugging plate is not mounted;
FIG. 7 is a schematic cross-sectional view taken along line C-C in FIG. 2 after installation of the plugging plate;
fig. 8 is a schematic structural view of a ring-shaped reinforcing bar according to a first embodiment of the present invention;
FIG. 9 is an enlarged view of a portion D of FIG. 1;
fig. 10 is a schematic structural view of a UHPC prefabricated panel according to a second embodiment of the present invention mounted on a longitudinal beam;
fig. 11 is a partial structural schematic view of a tongue-and-groove portion according to a third embodiment of the present invention.
The reference numbers in the figures denote:
1. UHPC precast slab; 10. mortises; 11. longitudinally splicing the slot; 12. a hollow groove; 13. a plugging plate; 14. a shear-resistant preformed groove; 15. a sealing strip; 2. a stringer; 3. splicing concrete; 4. a connecting member; 5. shear resistant nails; 6. shear concrete; 7. an annular reinforcing bar; 8. and (4) reinforcing mesh.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Example one
Referring to fig. 1 to 9, an ultra-high performance bridge deck structure comprises a plurality of UHPC precast slabs 1 which can be spliced with each other and a plurality of longitudinal beams 2 which are arranged at intervals along the width direction of the bridge deck and used for supporting the UHPC precast slabs 1; an inward-concave tongue-and-groove 10 is arranged at the end part of the transverse abutted seam of the adjacent UHPC precast slabs 1; two ends of the UHPC precast slabs 1 are lapped on the longitudinal beam 2, and a longitudinal joint groove 11 is reserved between the adjacent UHPC precast slabs 1; a plurality of hollow grooves 12 for reducing the mass of the bridge deck are arranged in the UHPC precast slab 1 at intervals longitudinally or transversely; a plugging plate 13 for preventing later-poured concrete from entering the hollow groove 12 is arranged at the communication part of the hollow groove 12 and the mortise 10 or the longitudinal joint groove 11; the mortises 10 and the longitudinal joint grooves 11 are both poured with joint concrete 3 for connecting the adjacent UHPC precast slabs 1 into a whole; the upper end of the longitudinal beam 2 in the longitudinal seam splicing groove 11 is fixed with a connecting piece 4; and after the abutted seam concrete 3 around the connecting piece 4 is solidified, the UHPC precast slabs 1 which are mutually spliced are fixed on the longitudinal beam 2.
As shown in fig. 3 and 4, the connecting member 4 is at least one inverted "U" -shaped steel bar; the lower end of the inverted U-shaped steel bar is fixed on the longitudinal beam 2.
As shown in fig. 1 to 5, a plurality of anti-shearing preformed grooves 14 are arranged on the UHPC prefabricated slab 1; the shear-resistant preformed groove 14 is positioned above the longitudinal beam 2; shear resistant nails 5 for improving the shear strength of the bridge deck are fixed on the longitudinal beams 2 in the shear resistant preformed grooves 14; and the shear concrete 6 is poured in the shear-resistant preformed groove 14.
As shown in fig. 1 to 5, the longitudinal section of the shear-resistant preformed groove 14 is trapezoidal; the opening of the shear-resistant preformed groove 14 is gradually reduced from top to bottom, and the bridge deck is clamped on the longitudinal beam 2 from top to bottom after the shear-resistant concrete 6 is solidified.
As shown in fig. 3 to 8, the annular steel bars 7 for improving the connection strength of the adjacent UHPC prefabricated slabs 1 are arranged in the mortise 10 and the longitudinal joint groove 11; and part of the annular reinforcing steel bar 7 is pre-buried and fixed on the adjacent UHPC precast slabs 1.
As shown in fig. 3 to 7, two layers of criss-cross reinforcing mesh 8 for improving the strength of the UHPC prefabricated slab 1 are arranged above and below the inside of the UHPC prefabricated slab 1.
As shown in fig. 5 and 6, the lower ends of the adjacent UHPC prefabricated panels 1 at the transverse seam are tightly attached; and a sealing strip 15 for preventing the leakage of the abutted concrete 3 is arranged at the position where the lower end parts of the adjacent UHPC precast slabs 1 are tightly attached.
As shown in fig. 1, 2, 5, 6 and 9, the cross-sectional shape of the hollow groove 12 is an ellipse or a rectangle or a trapezoid.
As shown in fig. 1 and 2, the longitudinal beam 2 is an i-shaped steel or a channel steel beam.
In the first embodiment of the present invention, as shown in fig. 1, at least two longitudinal splicing grooves 11 are formed between adjacent shear-resistant preformed grooves 14; the number of the longitudinal seam splicing grooves 11 is determined according to the actual requirement of the installation strength of the UHPC precast slabs 1 and the longitudinal beams 2.
Example two
In the second embodiment of the present invention, as shown in fig. 10, the main differences between the second embodiment and the first embodiment are: only one longitudinal joint groove 11 is arranged between the adjacent shear-resistant preformed grooves 14.
EXAMPLE III
In the third embodiment of the present invention, as shown in fig. 11, the main difference between the third embodiment and the first embodiment is: and reserving a section of width at the lower end part of the transverse abutted seam of the adjacent UHPC precast slabs 1, and pouring abutted seam concrete 3 at the mortise 10 through a bottom mounting template.
The utility model discloses a concrete construction method:
the utility model relates to a concrete construction method of a super high performance bridge deck structure, firstly, a longitudinal beam 2 is erected at the upper end of a bridge in a hoisting, pushing or dragging mode, and a connecting piece 4 and a shear resistant nail 5 are respectively welded and fixed at the upper end of the longitudinal beam 2 according to the positions of a longitudinal seam splicing groove 11 and a shear resistant reserved groove 14; or after the UHPC precast slabs 1 are arranged on the longitudinal beams 2, the connecting pieces 4 and the shear nails 5 are welded and fixed. Then, erecting a pouring template on the prefabricated part manufacturing platform, and firstly paving a bottom layer of reinforcing mesh 8; placing a mould at the corresponding position according to the shape of the mortise 10 and the anti-shearing preformed groove 14 so as to obtain the mortise 10 and the anti-shearing preformed groove 14 at the corresponding position after the UHPC precast slab 1 is molded, wherein the distance between the adjacent anti-shearing preformed grooves 14 can be determined according to the connection strength between the UHPC precast slab 1 and the longitudinal beam 2; pre-embedding a rubber air bag core mold or a plastic foam core mold or a steel core mold at the position of the hollow groove 12 so as to obtain the hollow groove 12 at the corresponding position after the UHPC precast slab 1 is molded; and (3) pre-embedding the annular steel bars 7 at corresponding mounting positions, paving the steel bar mesh 8 on the upper layer, pouring ultrahigh-performance concrete and maintaining to obtain the UHPC precast slab 1. Then, the UHPC precast slabs 1 are installed on the longitudinal beams 2 in a hoisting or pushing mode, plugging plates 13 are installed at the communicated positions of the hollow grooves 12 and the mortise 10 or the longitudinal joint grooves 11, and the positions, close to each other, of the lower end portions of the adjacent UHPC precast slabs 1 are sealed through sealing strips 15, or reserved spaces of the lower end portions of the adjacent UHPC precast slabs 1 are sealed through templates. Finally, pouring the abutted seam concrete 3 in the mortise 10 and the longitudinal abutted seam groove 11 to connect the mutually spliced UHPC precast slabs 1 into a whole and preliminarily fix the bridge deck on the longitudinal beam 2; and then pouring the shear concrete 6 in the shear-resistant preformed groove 14, so that the bridge deck is further fixed on the longitudinal beam 2, and the construction of the ultrahigh-performance bridge deck structure is finished. Consequently, this utility model discloses hollow structure's UHPC prefabricated plate 1 can reduce the whole quality of decking, can connect into a whole with the UHPC prefabricated plate 1 and the longeron 2 of concatenation mutually, and the decking resistance to plucking that the construction made, shear and shock resistance are strong, and can combine together prefabrication and cast-in-place, can effectively shorten the site operation time.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (9)
1. The utility model provides an ultra-high performance bridge deck structure which characterized in that: the bridge deck comprises a plurality of UHPC precast slabs (1) which can be spliced with each other and a plurality of longitudinal beams (2) which are arranged at intervals along the width direction of the bridge deck and used for supporting the UHPC precast slabs (1); an inward-concave tongue-and-groove (10) is arranged at the end part of the transverse abutted seam of the adjacent UHPC precast slabs (1); two ends of each UHPC precast slab (1) are lapped on the longitudinal beams (2), and a longitudinal joint groove (11) is reserved between every two adjacent UHPC precast slabs (1); a plurality of hollow grooves (12) for reducing the mass of the bridge deck are arranged in the UHPC precast slab (1) at intervals in the longitudinal direction or the transverse direction; a plugging plate (13) for preventing later-poured concrete from entering the hollow groove (12) is arranged at the communication part of the hollow groove (12) and the mortise (10) or the longitudinal joint groove (11); the mortises (10) and the longitudinal joint grooves (11) are both poured with joint concrete (3) for connecting the adjacent UHPC precast slabs (1) into a whole; a connecting piece (4) is fixed at the upper end of the longitudinal beam (2) in the longitudinal seam splicing groove (11); and after the abutted seam concrete (3) around the connecting piece (4) is solidified, the mutually spliced UHPC precast slabs (1) are fixed on the longitudinal beams (2).
2. An ultra-high performance bridge deck structure according to claim 1 wherein: the connecting piece (4) is at least one inverted U-shaped steel bar; the lower end of the inverted U-shaped steel bar is fixed on the longitudinal beam (2).
3. An ultra-high performance bridge deck structure according to claim 2 wherein: the upper surface of the UHPC precast slab (1) is provided with a plurality of anti-shearing reserved grooves (14); at least one longitudinal seam splicing groove (11) is formed between every two adjacent shearing-resistant reserved grooves (14); shear resistant nails (5) used for improving the shear strength of the bridge deck are fixed on the longitudinal beams (2) in the shear resistant preformed grooves (14); and the shear-resistant concrete (6) is poured in the shear-resistant preformed groove (14).
4. An ultra-high performance bridge deck structure according to claim 3 wherein: the longitudinal section of the shear-resistant preformed groove (14) is trapezoidal; the opening of the shear-resistant preformed groove (14) is gradually reduced from top to bottom, and the bridge deck is clamped on the longitudinal beam (2) from top to bottom after the shear-resistant concrete (6) is solidified.
5. An ultra-high performance bridge deck structure according to claim 4 wherein: annular steel bars (7) used for improving the connection strength of adjacent UHPC precast slabs (1) are arranged in the mortises (10) and the longitudinal joint grooves (11); and the annular steel bars (7) are partially embedded and fixed on the adjacent UHPC precast slabs (1).
6. An ultra-high performance bridge deck structure according to claim 5 wherein: two layers of criss-cross reinforcing meshes (8) for improving the strength of the UHPC precast slab (1) are arranged above and below the inside of the UHPC precast slab (1).
7. An ultra-high performance bridge deck structure according to claim 6 wherein: the lower end parts of the adjacent UHPC precast slabs (1) at the transverse abutted seam are tightly attached; and a sealing strip (15) for preventing the leakage of the abutted concrete (3) is arranged at the position where the lower end parts of the adjacent UHPC precast slabs (1) are tightly attached.
8. An ultra-high performance bridge deck structure according to claim 1 wherein: the cross section of the hollow groove (12) is oval, rectangular or trapezoidal.
9. An ultra-high performance bridge deck structure according to claim 1 wherein: the longitudinal beam (2) is an I-shaped steel beam or a groove-shaped steel beam.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920567912.5U CN210134346U (en) | 2019-04-24 | 2019-04-24 | Ultrahigh-performance bridge deck plate structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920567912.5U CN210134346U (en) | 2019-04-24 | 2019-04-24 | Ultrahigh-performance bridge deck plate structure |
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| CN210134346U true CN210134346U (en) | 2020-03-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109930484A (en) * | 2019-04-24 | 2019-06-25 | 深圳市市政设计研究院有限公司福建分公司 | A kind of very-high performance deck structrue and its construction method |
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2019
- 2019-04-24 CN CN201920567912.5U patent/CN210134346U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109930484A (en) * | 2019-04-24 | 2019-06-25 | 深圳市市政设计研究院有限公司福建分公司 | A kind of very-high performance deck structrue and its construction method |
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