CN210315221U - Ultra-high performance concrete combined bridge deck structure with large closed ribs - Google Patents
Ultra-high performance concrete combined bridge deck structure with large closed ribs Download PDFInfo
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- CN210315221U CN210315221U CN201920036858.1U CN201920036858U CN210315221U CN 210315221 U CN210315221 U CN 210315221U CN 201920036858 U CN201920036858 U CN 201920036858U CN 210315221 U CN210315221 U CN 210315221U
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Abstract
The utility model discloses a take super high performance concrete combination bridge floor structure of big closed rib, this bridge deck structure include steel roof and a plurality of closed rib, the equidistant interval welding of closed rib at the lower surface of steel roof, the reinforced concrete layer that reinforcing bar net and super high performance concrete placement formed has been laid to the upper surface of steel roof, the reinforcing bar net constitute by many transverse reinforcement and many longitudinal reinforcement of looks dislocation, thin layer polymer laying layer has still been laid on the reinforced concrete layer, closed rib is the great big closed stiffening rib of size, and the shape is big-end-up's isosceles trapezoid, and upper shed width W1 is 500mm, and base width W2 is 250mm, and high H is 380mm, two waists with contained angle α between the steel roof is 72 the utility model is suitable for a girder of well big stride footpath bridge structure.
Description
Technical Field
The utility model relates to a bridge structures specifically indicates a take super high performance concrete composite bridge floor structure of big closed rib.
Background
The common use of traditional orthotropic steel decking. Orthotropic steel decking has many advantages: (1) the dead weight is light; (2) the bearing capacity is high; (3) the construction period is short, and the factory manufacture and the field installation are both convenient; (4) as a part of the main beam is stressed, the bridge girder can be suitable for bridges with various structural forms and spans.
The existing common bridge deck structure is shown in fig. 1, and comprises a steel roof plate 1 and a plurality of closed ribs 2, wherein an asphalt concrete layer 3 is laid on the upper surface of the steel roof plate 1, the closed ribs 2 are fixedly welded on the lower surface of the steel roof plate 1, the center distance between two adjacent closed ribs 2 is 600mm, and the size of each closed rib 2 is as follows: the height is 280mm, the width of the upper opening is 300mm, the width of the bottom is 170mm, and the thickness is 8 mm. The bridge deck structure has the problems of fatigue failure and pavement layer diseases.
Fatigue failure and pavement layer diseases are difficult problems to be solved urgently by the traditional orthotropic steel bridge deck. The orthotropic steel bridge deck plate is of a welded structure and directly bears the load action of wheels, so that the fatigue damage is very prominent, and the fatigue problem at the connecting welding seam between the top plate and the U rib accounts for a large proportion; meanwhile, when flexible pavement layers such as asphalt concrete and the like are used, the steel bridge deck is greatly deformed, the stress state of the pavement layers is greatly influenced, and the pavement layer diseases such as cracking, pit grooves, ruts, transverse pushing and the like occur in many bridges after the bridges are put into operation.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a take super high performance concrete combination bridge deck structure of rib that closes greatly, this decking structure have solved the problem of orthotropic steel decking roof welding fatigue crack and the layer disease of flexible pavement, close the rib and adopt the great stiffening rib that closes greatly of size, are applicable to the girder of the bridge construction of striding greatly.
The utility model discloses a take super high performance concrete combination bridge floor structure of big closed rib, including steel roof and a plurality of closed rib, closed rib equidistant interval welding at the lower surface of steel roof, the reinforced concrete layer that reinforcing bar net and super high performance concrete pouring formed is laid to the upper surface of steel roof, reinforcing bar net constitute by many horizontal reinforcing bars and many longitudinal reinforcement of crisscross, thin polymer lays the layer on the reinforced concrete layer still, and its characterized in that, closed rib is the big closed stiffening rib that the size is great, and the shape is isosceles trapezoid big end down, and upper shed width W1 is 500mm, and base width W2 is 250mm, and height H is 380mm, two waists with the contained angle α between the steel roof is 72 degrees
The utility model belongs to orthotropic decking structure is a composite construction that can effectively solve the engineering disease, promote the efficiency of construction, reduce bridge life-span cost, and the rib that closes adopts the great big stiffening rib that closes of size, the girder of the bridge construction of stride greatly in the specially adapted.
The appearance of the dense reinforcement ultrahigh-performance concrete can solve the problems of fatigue failure of orthotropic steel bridge deck boards and pavement layer diseases. The Ultra-high performance concrete (UHPC) has higher elastic modulus (40-60 GPa), high compressive strength (150-230 MPa), certain tensile strength (7-10MPa) and good durability (chloride ion diffusion coefficient, water absorption characteristic, abrasion coefficient and the like are obviously lower than those of common concrete); after steam curing, the shrinkage and creep amounts are negligible. A dense reinforcing mesh is arranged in the ultra-high performance concrete, the ultra-high performance concrete is combined with a steel bridge deck through a shear connector, and a thin polymer pavement (TPO) layer with the thickness of 10mm is paved on the upper portion of a UHPC layer of the dense reinforcing mesh to serve as a wearing layer. Therefore, under the condition that the self weight is basically unchanged, the rigidity and the mechanical property of the bridge deck are obviously improved, and two problems of fatigue failure of the steel roof and diseases of a pavement layer can be solved.
In the utility model discloses, the thickness of closed rib is 10 mm.
The utility model discloses in, the centre-to-centre spacing between two adjacent closed ribs is 1000 mm.
The utility model discloses in, the thickness of steel roof plate is 12 mm.
The utility model discloses in, reinforced concrete layer's thickness is 50 mm.
The utility model discloses in, the thickness on thin layer polymer layer of mating formation is 10 mm.
The utility model discloses in, the upper surface of steel roof still welds before pouring the ultra high performance concrete and has the peg for be connected between reinforced concrete layer and the steel roof.
Compare with orthotropic steel decking of traditional closed rib, the utility model discloses a bridge deck structure can satisfy the standard and close the dimensional requirement of stiffening rib to the pressurized, the super high performance concrete combination bridge deck structure opening of the rib of closing greatly in area is wideer, use closed rib figure to reduce, welding seam quantity also will reduce by a wide margin, this has not only reduced the construction degree of difficulty, shorten construction cycle, make construction quality guarantee more easily, welding defect has also been reduced, further reduce orthotropic decking fatigue fracture's risk, better engineering using value has.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic structural view of a prior art deck structure;
FIG. 2 is a schematic view of the whole structure of the bridge deck structure of the present invention;
FIG. 3 is a schematic view of a partial structure of the bridge deck structure of the present invention;
fig. 4 is an enlarged view of a portion a of fig. 3.
In the figure: 1. the concrete comprises a steel top plate, 2 closed ribs, 21 waists, 22 bottom edges, 3 asphalt concrete layers, 4 longitudinal steel bars, 5 transverse steel bars, 6 ultrahigh-performance concrete, 7 thin-layer polymer pavement layers and 8 studs.
Detailed Description
The utility model relates to a super high performance concrete combination bridge floor structure of big closed rib in area is shown as figure 2 to figure 4, including steel roof 1 and a plurality of closed rib 2, a plurality of closed rib 2 are arranged into one row of equidistant welding at the lower surface of steel roof 1, closed rib 2 is the great big closed stiffening rib of size, two adjacent central intervals of closing between rib 2 are 1000mm, the thickness of closed rib 2 is 10mm, closed rib 2 is big-end-up's isosceles trapezoid, upper shed width W1 is 500mm, base 22 width W2 is 250mm, height H is 380mm, contained angle α between two waists 21 and the steel roof 1 is 72 degrees
The upper surface of the steel top plate 1 is paved with a reinforced concrete layer formed by pouring a reinforced mesh and the ultra-high performance concrete 6, the reinforced mesh is composed of a plurality of crossed transverse reinforcing steel bars 5 and a plurality of longitudinal reinforcing steel bars 4, and a thin polymer pavement layer 7 is further paved on the reinforced concrete layer, wherein the upper surface of the steel top plate 1 is welded with studs 8 before the ultra-high performance concrete 6 is poured, so that the connection between the reinforced concrete layer and the steel top plate 1 is enhanced.
In this embodiment, the thickness of steel roof 1 is 12mm, and the thickness of reinforced concrete layer is 50mm, and the thickness of thin polymer pavement layer 7 is 10 mm.
The utility model provides an ultra high performance concrete and thin layer polymer layer of mating formation are current material, can directly purchase on the market. For example, the ultra-high performance concrete can be made of UHPC150 and STC22, which are manufactured by Guangdong civil engineering technology, Inc., and China bridge science and technology, Inc., of China south of Hunan province. The thin polymer paving layer can be made of products such as Mark163 modified epoxy adhesive, basalt hard aggregate and the like produced by the Dow chemical company.
The utility model discloses a decking structure adopts the integrated configuration that big closed rib and ultra high performance concrete combination bridge floor structure combined together. Different from orthotropic steel bridge decks of traditional flexible paving layers, the dense reinforcement ultra-high performance concrete is used as a structural layer to participate in stress of the bridge decks, rigidity of the bridge decks is greatly improved, and therefore large-size closed ribs can be used for the structure, and the combined structure can exert larger stress efficiency and economic advantages.
The construction method of the ultrahigh-performance concrete combined bridge deck structure with the large closed ribs comprises the following steps:
(1) manufacturing a closed rib, and welding the closed rib with a steel top plate, wherein the closed rib is a large closed stiffening rib with a large size and is in an isosceles trapezoid shape with a large upper part and a small lower part, the width W1 of an upper opening is 500mm, the width W2 of a bottom edge is 250mm, the height H is 380mm, and the included angle α between two waists and the steel top plate is 72 degrees;
(2) welding studs on the upper surface of the steel top plate, and laying a reinforcing mesh;
(3) pouring ultrahigh-performance concrete on the steel top plate, forming a reinforced concrete layer by the reinforcing mesh and the ultrahigh-performance concrete, and performing high-temperature steam curing after the reinforced concrete layer meets the strength requirement specified by a relevant standard;
(4) and laying a thin polymer laying layer on the reinforced concrete layer.
The above embodiments of the present invention are not right the utility model discloses the limited protection scope, the utility model discloses an embodiment is not limited to this, all kinds of basis according to the above-mentioned of the utility model discloses an under the above-mentioned basic technical thought prerequisite of the utility model, right according to ordinary technical knowledge and the conventional means in this field the modification, replacement or the change of other multiple forms that above-mentioned structure made all should fall within the protection scope of the utility model.
Claims (7)
1. The ultra-high performance concrete combined bridge deck structure with the large closed ribs comprises a steel top plate (1) and a plurality of closed ribs (2), wherein the closed ribs (2) are welded to the lower surface of the steel top plate (1) at equal intervals, a reinforced concrete layer formed by pouring a reinforced mesh and ultra-high performance concrete (6) is laid on the upper surface of the steel top plate (1), the reinforced mesh consists of a plurality of crossed transverse reinforcing steel bars (5) and a plurality of longitudinal reinforcing steel bars (4), and a thin polymer laying layer (7) is further laid on the reinforced concrete layer.
2. The ultra-high performance concrete composite deck structure with large closed ribs of claim 1, wherein: the thickness of the closed rib (2) is 10 mm.
3. The ultra-high performance concrete composite deck structure with large closed ribs of claim 1, wherein: the center distance between two adjacent closed ribs (2) is 1000 mm.
4. The ultra-high performance concrete composite deck structure with large closed ribs of claim 1, wherein: the thickness of the steel top plate (1) is 12 mm.
5. The ultra-high performance concrete composite deck structure with large closed ribs of claim 1, wherein: the thickness of reinforced concrete layer is 50 mm.
6. The ultra-high performance concrete composite deck structure with large closed ribs of claim 1, wherein: the thin polymer layer (7) is 10mm thick.
7. The ultra-high performance concrete composite deck structure with large closed ribs of claim 1, wherein: the upper surface of the steel top plate (1) is further welded with studs (8) before the ultra-high performance concrete (6) is poured so as to enhance the connection between the reinforced concrete layer and the steel top plate (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201920036858.1U CN210315221U (en) | 2019-01-09 | 2019-01-09 | Ultra-high performance concrete combined bridge deck structure with large closed ribs |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920036858.1U CN210315221U (en) | 2019-01-09 | 2019-01-09 | Ultra-high performance concrete combined bridge deck structure with large closed ribs |
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| CN210315221U true CN210315221U (en) | 2020-04-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109853380A (en) * | 2019-01-09 | 2019-06-07 | 广东省交通规划设计研究院股份有限公司 | A kind of hardened structure of ultra-high performance concrete combined bridge deck and its construction method of band rib silent greatly |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109853380A (en) * | 2019-01-09 | 2019-06-07 | 广东省交通规划设计研究院股份有限公司 | A kind of hardened structure of ultra-high performance concrete combined bridge deck and its construction method of band rib silent greatly |
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Address after: No.146, huangbian North Road, Baiyun District, Guangzhou, Guangdong 510440 Patentee after: Guangdong transportation planning and Design Institute Group Co.,Ltd. Address before: 510507 No. 22, Xinghua Road, Guangzhou, Guangdong Patentee before: GUANGDONG PROVINCE COMMUNICATIONS PLANNING & DESIGN INSTITUTE Co.,Ltd. |
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