CN217078368U - Composite structure bridge with cantilever plate - Google Patents

Abstract

The embodiment of the utility model provides a composite construction bridge with cantilever slab, including girder and cantilever slab, the cantilever slab sets up the upper surface of girder, the cantilever slab includes prefabricated plate and cast-in-place concrete layer, the prefabricated plate sets up the upper surface of girder, cast-in-place concrete layer is partly pour at least the upper surface of prefabricated plate, the prefabricated plate includes the curved muscle of multiunit, curved muscle both ends are followed the thickness direction gomphosis on prefabricated concrete layer is in the prefabricated concrete layer, the kink that states curved muscle upwards stretches out prefabricated concrete layer and gomphosis are in state in the cast-in-place concrete layer. Therefore, the composite structure bridge with the cantilever plate provided by the embodiment of the utility model has the advantages of simplifying construction steps, improving the convenience of operation and improving the construction speed; meanwhile, the method also has the advantage of reducing the cost of labor and materials for construction.

Description

Composite structural bridge with cantilever slabs

technical field

The utility model relates to the technical field of bridges, in particular to a composite structure bridge with cantilever plates.

Background technique

Steel-concrete composite bridge refers to a bridge structure that connects steel beams and concrete bridge decks through shear connectors and considers common forces. Compared with steel structure bridges, steel-concrete composite bridges have the advantages of small steel consumption, high stiffness, and good compression stability; compared with concrete bridges, composite bridges have the advantages of low structural height, low self-weight, simple structure and convenient construction , Good mechanical performance, etc.

In the related art, the setting formwork is mostly used, and the concrete is poured on the formwork on site. The integrity of the cast-in-place concrete bridge deck is good, and it is easy to meet the cross-section requirements of various bridge decks. However, the amount of formwork engineering and on-site wet work is large, and the construction speed is slow; when the bending resistance of the formwork is poor, it cannot be completely made of steel. For beam support, it is necessary to set up floor-to-ceiling scaffolding, which not only increases the construction cost, but also seriously hinders the passage of traffic under the bridge.

SUMMARY OF THE INVENTION

This utility model is made based on the inventor's discovery and understanding of the following facts and problems:

The composite structure bridge with cantilever plates according to the embodiment of the present invention includes a main beam and a cantilever plate, the cantilever plate is arranged on the upper surface of the main beam, the cantilever plate includes a prefabricated plate and a cast-in-place concrete layer, and the prefabricated plate It is erected on the upper surface of the main beam, and at least a part of the cast-in-place concrete layer is poured on the upper surface of the prefabricated panel. The prefabricated panel includes a prefabricated concrete layer and a plurality of sets of bent bars, and the ends of the bent bars are fitted with each other. In the precast concrete layer, the bent portion of the bending rib protrudes upward from the precast concrete layer and is embedded in the cast-in-place concrete layer.

The cantilever plate in the composite structure bridge with the cantilever plate according to the embodiment of the present invention is composed of a prefabricated plate and a cast-in-place concrete layer. It can be directly used as the bottom form in the formwork. When pouring the cast-in-place concrete layer, it is no longer necessary to set up a floor-to-ceiling scaffold to support the formwork. It is only necessary to fix the prefabricated prefabricated slab to the main beam, avoiding the need to set up a floor-to-ceiling scaffold. (The formwork itself has poor bending resistance, and often needs to be constructed by erecting floor-to-ceiling scaffolding). Among them, the prefabricated board not only plays the role of directly supporting the cast-in-place concrete layer (playing as the bottom form in the formwork), but also can replace the bracket or floor scaffolding required for erecting the cast-in-place concrete layer, which saves a lot of labor costs. The advantages of speeding up the construction progress and reducing the difficulty of construction. At the same time, the precast slab is also used as a part of the cantilever slab, which improves the structural stability of the cantilever slab, reduces the thickness of the cast-in-place concrete layer to a certain extent, shortens the setting time of the cast-in-place concrete layer, and thus shortens the construction period.

In addition, the prefabricated plate in the composite structure bridge with the cantilever plate of the embodiment of the present invention is directly fixed on the upper end of the main beam, so that the entire construction work is concentrated on the main beam, which has the advantage of not hindering the passage of vehicles under the bridge.

In addition, in the composite structure bridge with cantilever slabs according to the embodiments of the present invention, the bent ribs are arranged on the prefabricated slabs, and the bent ribs are embedded in the prefabricated concrete layer along the thickness direction of the prefabricated concrete layer. The bending part of the bending bar extends upward from the precast concrete layer and is embedded in the cast-in-situ concrete layer, which can enhance the bonding stability between the precast concrete layer and the cast-in-place concrete layer, and improve the cantilever. The mechanical properties of the plate. The bent portion of the bent rib can also be used as a hanging lug for hoisting the prefabricated panel during construction, providing multiple hoisting points for the hoisting of the prefabricated panel, and has the advantage of improving the convenience of hoisting the prefabricated panel.

Therefore, the composite structure bridge with the cantilever plate of the embodiment of the present invention has the advantages of simplifying construction steps, facilitating the lifting operation, and improving the construction speed, and at the same time, it also has the advantages of reducing the cost of construction labor and materials.

In some embodiments, the prefabricated panel further includes a top layer reinforcement and a bottom layer reinforcement, the top layer reinforcement is disposed above the bottom layer reinforcement, each of the top layer reinforcement and the bottom layer reinforcement All are arranged in the precast concrete layer.

In some embodiments, the distance between the top layer reinforcement and the upper surface of the precast concrete layer is greater than or equal to 10 mm, and the distance between the bottom layer reinforcement and the lower surface of the precast concrete layer is greater than or equal to 10 mm.

In some embodiments, the number of each of the top layer reinforcement and the bottom layer reinforcement is multiple, and the distance between two adjacent top layer reinforcements is 90mm-110mm, and two adjacent The spacing between the bottom layer reinforcements is 90mm-110mm, and each of the top layer and bottom layer reinforcements has a diameter of 10mm-14mm.

In some embodiments, the thickness of the cast-in-place concrete layer is greater than that of the precast concrete layer, the thickness of the cast-in-place concrete layer is greater than or equal to 7 cm, and the thickness of the precast concrete layer is 6 cm-10 cm.

In some embodiments, the curved rib is U-shaped, V-shaped or O-shaped.

In some embodiments, one end of the prefabricated panel is placed on a part of the upper surface of the main beam, and the prefabricated panel moves from the main beam to a direction away from the main beam in the width direction of the main beam extension, wherein a part of the cast-in-place concrete layer is cast on the upper surface of the prefabricated panel, and another part of the cast-in-place concrete layer is cast on another part of the upper surface of the main beam.

In some embodiments, the main beam is an I-shaped steel beam, the upper part of the steel beam is an upper flange plate, and the part of the prefabricated plate is connected with the upper flange plate by a connecting piece, The connecting piece includes a first bolt group and a second bolt group arranged in parallel, the first bolt group is disposed close to the edge of the upper flange plate, and the second bolt group is close to the center line of the upper flange plate Setting, each of the first bolt group and the second bolt group includes a plurality of bolts, the prefabricated plate has a plurality of bolt holes, and the bolts are arranged in the bolt holes in a one-to-one correspondence Inside.

In some embodiments, each of the bolt holes is provided with a plurality of well-shaped bars, each well-shaped bar has a rectangular frame portion and an extension portion extending outward along the corners of the rectangular frame portion, the The rectangular frame portion is sleeved on the bolt holes, and a plurality of the well-shaped steel bars are arranged at intervals along the thickness direction of the precast concrete layer.

In some embodiments, the composite structural bridge with cantilevered slabs of the embodiments of the present invention further includes a peg, the peg including: a vertical portion and a horizontal portion. The vertical part is connected with the upper flange plate, at least a part of the vertical part protrudes upward from the upper flange plate, the horizontal part is connected with the at least part of the vertical part, so The at least a portion of the vertical portion and the horizontal portion are cast within the other portion of the cast-in-place concrete layer.

Description of drawings

FIG. 1 is a schematic structural diagram of a composite structure bridge with cantilever plates according to an embodiment of the present invention.

FIG. 2 is a schematic structural diagram of a composite structure bridge with a cantilever plate according to an embodiment of the present invention (before the cast-in-place concrete layer is not poured).

FIG. 3 is a schematic diagram of the internal structure of a prefabricated panel according to an embodiment of the present invention.

4 is another schematic diagram of the internal structure of the prefabricated board according to the embodiment of the present invention.

FIG. 5 is a schematic diagram of the positional relationship between the well-shaped steel bar and the bolt hole according to the embodiment of the present invention.

Reference number:

Composite structure bridge 100;

Main beam 1; Upper flange plate 11;

Cantilever plate 2;

Prefabricated slab 21; Prefabricated concrete layer 221; Bending bar 222; Top layer bar 223; Bottom layer bar 224; T-shaped bar 225;

cast-in-place concrete layer 22;

The first bolt group 31; the second bolt group 32;

peg 4; vertical part 41; horizontal part 42.

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to be used to explain the present invention, but should not be construed as a limitation of the present invention.

The composite structure bridge 100 with the cantilever plate according to the embodiment of the present invention will be described below with reference to FIGS. 1 to 5 .

The composite structure bridge 100 with the cantilever plate according to the embodiment of the present invention includes a main beam 1 and a cantilever plate 2. The cantilever plate 2 is arranged on the upper surface of the main beam 1. The cantilever plate 2 includes a prefabricated plate 21 and a cast-in-place concrete layer 22. The prefabricated slab 21 is erected on the upper surface of the main beam 1, and at least a part of the cast-in-place concrete layer 22 is poured on the upper surface of the prefabricated slab 21. The prefabricated slab 21 includes a prefabricated concrete layer 221 and a plurality of sets of bent ribs 222, and the two ends of the bent ribs 222 are fitted with each other. In the precast concrete layer 221 , the bent portion of the rib 222 protrudes upward from the precast concrete layer 221 and is fitted into the cast-in-place concrete layer 22 .

The cantilever plate 2 in the composite structure bridge 100 with the cantilever plate according to the embodiment of the present invention is composed of a prefabricated plate 21 and a cast-in-place concrete layer 22 . The required formwork is supported or can be directly used as the bottom form in the formwork. When pouring the cast-in-place concrete layer 22, it is no longer necessary to erect a floor-to-ceiling scaffolding to support the formwork. For beam 1, avoid the construction by erecting floor-to-ceiling scaffolding (the formwork itself has poor bending resistance, and construction is often carried out by erecting floor-to-ceiling scaffolding). Wherein, the prefabricated plate 21 not only plays the role of directly supporting the cast-in-place concrete layer 22 (plays the role of the bottom form in the formwork), and the prefabricated plate 21 can also replace the bracket or floor scaffolding that needs to be erected for pouring the cast-in-place concrete layer 22, It saves a lot of labor costs and has the advantages of speeding up the construction progress and reducing the difficulty of construction. At the same time, the prefabricated plate 21 is also used as a part of the cantilever plate 2, which improves the structural stability of the cantilever plate 2, reduces the thickness of the cast-in-place concrete layer 22 to a certain extent, and shortens the solidification time of the cast-in-place concrete layer 22. Shortened construction period.

In addition, in the composite structure bridge 100 with the cantilever plate in the embodiment of the present invention, the prefabricated plate 21 is directly fixed on the upper end of the main beam 1, so that the entire construction work is concentrated on the main beam 1, and there is no obstacle to the passage of vehicles under the bridge. advantage.

In addition, in the composite structure bridge 100 with the cantilever plate according to the embodiment of the present invention, the bent ribs 222 are arranged on the prefabricated slabs 21, and the bent ribs 222 are embedded in the prefabricated concrete layer 221 along the thickness direction of the prefabricated concrete layer 221, The bending part of the bending rib 222 extends upward from the precast concrete layer 221 and is embedded in the cast-in-place concrete layer 22, which can enhance the stability of the bond between the precast concrete layer 221 and the cast-in-place concrete layer 22, and improve the cantilever slab. 2 the force performance. The bent portion of the bent rib 222 can also be used as a hanging lug for hoisting the prefabricated panel 21 during construction, providing multiple hoisting points for hoisting the prefabricated panel 21 , and has the advantage of improving the convenience of hoisting the prefabricated panel 21 .

Therefore, the composite structure bridge 100 with the cantilever plate of the embodiment of the present invention has the advantages of simplifying construction steps, facilitating the lifting operation, and increasing the construction speed, and at the same time, it also has the advantages of reducing the cost of construction labor and materials.

As shown in FIGS. 3 and 4 , the prefabricated board 21 further includes a top layer rib 223 and a bottom layer rib 224 , the top layer rib 223 is arranged above the bottom layer rib 224 , and each of the top layer rib 223 and the bottom layer rib 224 Both are arranged in the precast concrete layer 221 .

The composite structure bridge 100 with the cantilever plate in the embodiment of the present invention improves the negative bending moment load bearing and longitudinal shear resistance of the cantilever plate 2 by arranging the top layer reinforcement 223 in the precast concrete layer 221, and through the bottom layer cloth Ribs 224 are provided to enhance the positive bending moment load and longitudinal shear performance of the cantilever plate 2 produced. Therefore, the composite structure bridge 100 with the cantilever plate according to the embodiment of the present invention has the advantage of large load bearing capacity.

The present application is not limited to this, for example, in other embodiments, as shown in FIG. 3 , the prefabricated panel 21 further includes a channel steel 227 , and the channel steel 227 is arranged in parallel with the top layer reinforcement 223 . The load bearing capacity of the cantilever plate 2 can be further improved.

As shown in FIG. 3 and FIG. 4 , the number of each of the top layer reinforcement 223 and the bottom layer reinforcement 224 is plural, the distance between the top layer reinforcement 223 and the upper surface of the precast concrete layer 221 is greater than or equal to 10 mm, and the bottom layer The distance between the rib 224 and the lower surface of the precast concrete layer 221 is greater than or equal to 10 mm. It can be understood that the top layer reinforcement 223 and the bottom layer reinforcement 224 are embedded in the precast concrete layer 221 , the upper surface of the top layer reinforcement 223 precast concrete layer 221 has a certain safety distance, and the bottom layer reinforcement 224 The lower surface of the precast concrete layer 221 has a certain safety distance. There is also a certain safety distance.

In the composite structure bridge 100 with cantilever panels of the embodiment of the present invention, by embedding the top layer reinforcement 223 and the bottom layer reinforcement 224 in the precast concrete layer 221, the top layer reinforcement 223 and the bottom layer reinforcement 224 can be prevented from being directly exposed to the air. There is a problem of easy corrosion, which further increases the service life of the cantilever plate 2 . In addition, the safety distance set between the top layer reinforcement 223 and the upper surface of the precast concrete layer 221 is greater than or equal to 10mm, and the safety distance set between the bottom layer reinforcement 224 and the lower surface of the precast concrete layer 221 is greater than or equal to 10mm. The flatness of the upper and lower surfaces of the small and prefabricated boards 21 is poor, which causes the problem that the top cloth ribs 223 and the bottom layer cloth ribs 224 are exposed, which further improves the service life of the cantilever plate 2 .

Optionally, each of the extending direction of the top fabric reinforcement 223 and the extending direction of the bottom fabric reinforcement 224 is consistent with the lengthwise extending direction of the cantilever plate 2 .

As shown in FIG. 3 and FIG. 4 , the spacing between two adjacent top-layer reinforcement bars 223 is 90mm-110mm, the distance between two adjacent bottom-layer reinforcement bars 224 is 90mm-110mm, and the top-layer reinforcement bars 223 and the bottom-layer reinforcement bars are 90mm-110mm apart. Each of 224 is 10mm-14mm in diameter. The ability of the top cloth reinforcement 223 and the bottom cloth reinforcement 224 to bear the load can be improved, thereby improving the stability of the prepared cantilever plate 2 structure.

As shown in FIGS. 1 and 2 , the thickness of the cast-in-place concrete layer 22 is greater than that of the precast concrete layer 221 , the thickness of the cast-in-place concrete layer 22 is greater than or equal to 7cm, and the thickness of the precast concrete layer 221 is 6cm-10cm. The stability of the manufactured cantilever plate 2 can be further improved. For example, the thickness of the cast-in-place concrete layer 22 is 10 cm, and the thickness of the precast concrete layer 221 is 7 cm.

As shown in FIG. 3 and FIG. 4 , the bent bars 222 are U-shaped, V-shaped or O-shaped (the part of the bent bars 222 embedded in the precast concrete layer 221 is not shown). The U-shaped, V-shaped or O-shaped bending ribs used in the prefabricated panels of the composite structure bridge 100 with cantilever panels in the embodiment of the present invention have the advantage of simple structure.

As shown in FIGS. 1 and 2 , one end of the prefabricated plate 21 is placed on a part of the upper surface of the main beam 1 , and the prefabricated plate 21 extends from the main beam 1 to the direction away from the main beam 1 in the width direction of the main beam 1 , that is, The rest of the precast panel 21 (the part of the precast panel 21 other than the one end thereof) is not in direct contact with the upper surface of the main beam 1 (eg, suspended). A part of the cast-in-place concrete layer 22 is cast on the upper surface of the prefabricated slab 21 , and another part of the cast-in-place concrete layer 22 is cast on another part of the upper surface of the main beam 1 . In other words, a part of the lower surface of the cast-in-place concrete layer 22 is bonded to the upper surface of the main beam 1 , and the other part of the lower surface of the cast-in-place concrete layer 22 is bonded to the upper surface of the precast panel 21 .

The composite structure bridge 100 with the cantilever plate of the embodiment of the present invention is connected to each of the prefabricated plate 21 and the upper surface of the main beam 1 through the cast-in-place concrete layer 22 , and the connection between the cantilever plate 2 and the main beam 1 can be lifted. of stability.

As shown in Figures 1 and 2, the main beam 1 is an I-shaped steel beam, the upper part of the steel beam is an upper flange plate 11, and a part of the prefabricated plate 21 is connected with the upper flange plate 11 through a connecting piece, and the connecting piece includes The first bolt group 31 and the second bolt group 32 are arranged in parallel, the first bolt group 31 is disposed close to the edge of the upper flange plate 11, the second bolt group 32 is disposed close to the centerline of the upper flange plate 11, and the first bolt group 31 and each of the second bolt groups 32 includes a plurality of bolts, the prefabricated plate 21 has a plurality of bolt holes 226 , and the bolts are disposed in the bolt holes 226 in a one-to-one correspondence.

The composite structure bridge 100 with the cantilever plate of the embodiment of the present invention has the advantages of high rigidity, convenient construction and good mechanical performance by setting the main beam 1 as an I-shaped steel beam. In addition, the prefabricated plate 21 and the steel beam are connected by the first bolt group 31 and the second bolt group 32 arranged in parallel, which has the advantages of simple construction and stable connection.

Optionally, the distance between two adjacent bolts is 10-15cm.

Optionally, as shown in FIG. 1 and FIG. 2 , the upper and lower ends of the bolt are provided with nuts, the upper nut abuts on the upper surface of the upper prefabricated plate, and the lower nut abuts on the lower surface of the upper flange plate 11 .

As shown in FIG. 5 , each bolt hole 226 is provided with a plurality of well-shaped bars 225, and each well-shaped bar 225 has a rectangular frame portion 2251 and an extension portion 2252 extending outward from the corner of the rectangular frame portion 2251, The rectangular frame portion 2251 is sleeved outside the bolt hole 226 , and a plurality of well-shaped steel bars 225 are arranged at intervals along the thickness direction of the precast concrete layer 221 .

The composite structure bridge 100 with the cantilever plate according to the embodiment of the present invention can strengthen the strength around the bolt holes 226 corresponding to the well-shaped steel bars 225 by arranging a plurality of well-shaped steel bars 225 , and further enhances the strength of the prefabricated plate 21 and the The stability of the steel beam connection.

Optionally, each well-shaped steel bar 225 is welded by four steel bars.

As shown in FIG. 1 and FIG. 2 , the composite structure bridge 100 with cantilever plates according to the embodiment of the present invention further includes a stud 4, and the stud 4 includes a vertical portion 41 and a horizontal portion 42, and the vertical portion 41 and the upper flange The plate 11 is connected, at least a part of the vertical part 41 protrudes upward from the upper flange plate 11, the horizontal part 42 is connected with at least a part of the vertical part 41, and at least a part of the vertical part 41 and the horizontal part 42 are cast in the cast-in-place concrete. within another portion of layer 22 .

The composite structure bridge 100 with the cantilever plate according to the embodiment of the present invention can improve the connection stability between the cast-in-place concrete layer 22 and the main beam 1 by setting the studs 4 .

Optionally, the pegs 4 and the upper flange plate 11 can be fixed by means of screw connection or welding. In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axial" The orientation or positional relationship indicated by , "radial direction", "circumferential direction", etc. are based on the orientation or positional relationship shown in the accompanying drawings, which are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying the indicated device. Or the elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

In the present utility model, unless otherwise expressly specified and limited, the terms "installation", "connection", "connection", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integration; it can be mechanical connection, electrical connection or communication with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal communication between two elements or the interaction relationship between the two elements , unless otherwise expressly qualified. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and defined, a first feature "on" or "under" a second feature may be in direct contact with the first and second features, or the first and second features through an intermediary indirect contact. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In this application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean the specific features, structures, materials described in connection with the embodiment or example Or features are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

Although the embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limitations of the present invention, and those of ordinary skill in the art are within the scope of the present invention Variations, modifications, substitutions and variations can be made to the above-described embodiments.

Claims (10)

1. a composite structure bridge with cantilever plate, is characterized in that, comprises: a main beam and a cantilever plate disposed on the upper surface of the main beam; The cantilever slab includes a prefabricated slab and a cast-in-place concrete layer, the prefabricated slab is erected on the upper surface of the main beam, and at least a part of the cast-in-place concrete layer is cast on the upper surface of the prefabricated slab, and the prefabricated slab comprises A prefabricated concrete layer and a plurality of groups of bent bars, both ends of the bent bars are embedded in the prefabricated concrete layer, and the bent portion of the bent bars extends upward from the prefabricated concrete layer and is embedded in the prefabricated concrete layer. poured into the concrete layer. 2 . The composite structure bridge with cantilever panels according to claim 1 , wherein the prefabricated panel further comprises a top layer reinforcement and a bottom layer reinforcement, and the top layer reinforcement is arranged above the bottom layer reinforcement, 2 . Each of the top layer reinforcement and the bottom layer reinforcement is disposed within the precast concrete layer. 3 . The composite structure bridge with cantilever slabs according to claim 2 , wherein the distance between the top layer reinforcement and the upper surface of the precast concrete layer is greater than or equal to 10 mm, and the bottom layer reinforcement is away from the precast concrete layer. 4 . The distance between the lower surface of the concrete layer is greater than or equal to 10mm. 4 . The composite structural bridge with cantilever panels according to claim 2 , wherein the number of each of the top layer reinforcement and the bottom layer reinforcement is plural, and adjacent two said The spacing between the top cloth ribs is 90mm-110mm, the spacing between two adjacent bottom layer cloth ribs is 90mm-110mm, and the diameter of each of the top layer cloth ribs and the bottom layer cloth ribs is 10mm-14mm . 5. The composite structure bridge with cantilever slabs according to claim 2, wherein the thickness of the cast-in-place concrete layer is greater than the thickness of the precast concrete layer, the thickness of the cast-in-place concrete layer is greater than or equal to 7cm, and the The thickness of the precast concrete layer is 6cm-10cm. 6. The composite structural bridge with cantilever slabs according to any one of claims 1-5, characterized in that, the curved ribs are U-shaped, V-shaped or O-shaped. 7. The composite structural bridge with cantilever panels according to any one of claims 1 to 5, wherein one end of the prefabricated panel is placed on a part of the upper surface of the main beam, and the prefabricated panel is located at the The width direction of the main beam extends from the main beam to the direction away from the main beam, wherein a part of the cast-in-place concrete layer is poured on the upper surface of the precast slab, and another part of the cast-in-place concrete layer Another part of the upper surface of the main beam is poured. 8 . The composite structure bridge with cantilever plate according to claim 7 , wherein the main beam is an I-shaped steel beam, the upper part of the steel beam is an upper flange plate, and the prefabricated plate has an upper flange plate. 9 . The part is connected with the upper flange plate through a connecting piece, the connecting piece includes a first bolt group and a second bolt group arranged in parallel, and the first bolt group is arranged close to the edge of the upper flange plate, The second bolt group is disposed near the centerline of the upper flange plate, each of the first bolt group and the second bolt group includes a plurality of bolts, and the prefabricated plate has a plurality of bolts The bolts are arranged in the bolt holes in a one-to-one correspondence. 9 . The composite structure bridge with cantilever plate according to claim 8 , wherein a plurality of well-shaped steel bars are arranged outside each of the bolt holes, and each well-shaped steel bar has a rectangular frame portion and a shape along the rectangular frame portion. 10 . An extension portion extending outward at the corner of the frame portion, the rectangular frame portion is sleeved on the bolt hole, and a plurality of the well-shaped steel bars are arranged at intervals along the thickness direction of the precast concrete layer. 10. The composite structural bridge with cantilevered slabs of claim 8, further comprising studs comprising: a vertical portion connected to the upper flange plate, at least a portion of the vertical portion extending upwardly from the upper flange plate; and a horizontal portion connected to the at least a portion of the vertical portion, the at least a portion of the vertical portion and the horizontal portion being cast in the other portion of the cast-in-place concrete layer .

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