CN111733697A - Prefabricated assembled composite slab structure - Google Patents
Prefabricated assembled composite slab structure Download PDFInfo
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- CN111733697A CN111733697A CN201911166641.3A CN201911166641A CN111733697A CN 111733697 A CN111733697 A CN 111733697A CN 201911166641 A CN201911166641 A CN 201911166641A CN 111733697 A CN111733697 A CN 111733697A
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- trapezoidal plate
- prefabricated
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
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Abstract
The invention relates to the technical field of bridge engineering and discloses a prefabricated assembled composite slab structure which comprises a prefabricated bottom plate and a cast-in-place top plate which are stacked, wherein the prefabricated bottom plate is formed by sequentially matching and connecting a plurality of regular trapezoidal plates and inverted trapezoidal plates, and the edge inclined planes in the width direction of the regular trapezoidal plates are matched with the edge inclined planes in the width direction of the inverted trapezoidal plates. The prefabricated bottom plate is formed by splicing the regular trapezoidal plate and the inverted trapezoidal plate through the edge inclined planes, gaps among traditional segmental splicing plates can be compressed to the maximum extent, the prefabricated bridge deck plate enables the contact among the edge inclined plane joints to be tighter under the action of self gravity, and the stress performance is better; the tail ends of the shear teeth and the shear tooth-shaped structures are 'corbel parts' capable of transferring shear force, so that the tensile force required to be transferred between the prefabricated regular trapezoidal plate and the inverted trapezoidal plate is converted into the shear force transferred between the tooth blocks at the joint, and the joint sections of the adjacent trapezoidal plates can transfer the tensile force mutually.
Description
Technical Field
The invention relates to the technical field of bridge engineering, in particular to a prefabricated assembled composite slab structure.
Background
The existing concrete bridge deck construction technology generally adopts a cast-in-place slab or a traditional laminated slab scheme.
The cast-in-place scheme is that a template is erected on a bridge girder, then reinforcing steel bars are bound, and then concrete is poured. The method has the advantages of low construction speed, time and labor consumption in installing and dismantling the template, and poor quality guarantee of the cast-in-place concrete.
The traditional laminated slab scheme is that the slab is designed into a structure with an upper layer and a lower layer, the lower layer generally adopts a precast slab, the precast slab is firstly erected on a bridge girder in the construction process, then concrete is poured on the precast slab, and the upper layer and the lower layer are integrated by arranging a shear key or a steel bar between the two layers of slabs. The scheme can save the time for building the template on site, but the plates of the lower prefabricated plate are relatively independent and can not transfer load, so that the traditional laminated plate generally has larger self weight.
In addition, when the bridge deck slab is paved, a bracket needs to be erected and a template needs to be arranged to support concrete, the method is time-consuming and labor-consuming, and particularly, when the template is detached, the box beam is particularly troublesome and labor-consuming; when deck boards are laid on the overpass bridge, the supports can obstruct the passage of the following route.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a prefabricated assembled composite slab structure capable of bearing tensile force.
The purpose of the invention is realized by the following technical scheme:
the utility model provides a superimposed sheet structure is assembled in prefabrication, is including folding the prefabricated bottom plate and the cast-in-place roof of establishing, and the prefabricated bottom plate is matchd in proper order by the positive trapezoidal plate of polylith and falls the trapezoidal plate and link up and form, positive trapezoidal plate width direction edge inclined plane and the adaptation of falling trapezoidal plate width direction edge inclined plane.
Furthermore, shear teeth are extended from the inclined planes of the same side edges of the regular trapezoidal plate and the inverted trapezoidal plate on the prefabricated bottom plate, inner concave teeth matched with the shear teeth in position are arranged on the inclined plane of the other side edge of the prefabricated bottom plate, the shear teeth and the inner concave teeth between the regular trapezoidal plate and the inverted trapezoidal plate can be in seamless butt joint, and the regular trapezoidal plate and the inverted trapezoidal plate are parallel and level to each other in length direction after butt joint.
Further, the shear tooth cross-section is any one or more of trumpet-shaped, triangular or T-shaped.
Furthermore, reinforcing ribs are distributed in the shear teeth; reinforcing ribs are distributed in a shear tooth-shaped structure formed on the edge inclined plane provided with the concave teeth of the regular trapezoidal plate and the inverted trapezoidal plate.
And furthermore, the reinforcing rib is a reinforcing steel bar arranged around the profile of the shear tooth and the shear tooth-shaped structure and/or a T-shaped structure formed by a steel plate and a reinforcing block, wherein the steel plate is attached to the tooth surface of the shear tooth and the tooth surface of the shear tooth-shaped structure, and the reinforcing block is connected with the steel plate.
Still further, the setting amount of reinforcing bar and T type structure is according to the pulling force size that prefabricated floorbar needs to bear.
Furthermore, at least one clamping groove is formed in the surface, which is connected with the cast-in-place top plate, of the regular trapezoidal plate and the inverted trapezoidal plate respectively.
Furthermore, the clamping groove penetrates through the length directions of the regular trapezoidal plate and the inverted trapezoidal plate and is parallel to the length direction.
Still further, the draw-in groove degree of depth is less than 5mm, and the width is less than 10 mm.
Still further, the interval between the adjacent draw-in groove on positive trapezoidal plate, the trapezoidal board of falling is 10 ~ 50 cm.
Compared with the prior art, the invention has the following beneficial effects:
1) the prefabricated bottom plate is formed by splicing the regular trapezoidal plate and the inverted trapezoidal plate through the edge inclined planes, gaps among traditional segmental splicing plates can be compressed to the maximum extent, the prefabricated bridge deck plate enables the contact among the edge inclined plane joints to be tighter under the action of self gravity, and the stress performance is better;
2) the tail ends of the shear teeth and the shear tooth-shaped structures are corbels capable of transferring shear force, so that the tensile force required to be transferred between the prefabricated regular trapezoidal plate and the inverted trapezoidal plate is converted into the shear force transferred between the tooth blocks at the joint, and the joint sections of the adjacent trapezoidal plates can transfer the tensile force mutually;
3) reinforcing steel bars or T-shaped structures are reasonably arranged in the shear teeth and the shear tooth-shaped structure teeth, so that the capacity of the joint section of the tooth block to bear the tensile force is basically equivalent to that of the non-joint section of the prefabricated bottom plate;
4) the clamping grooves are formed in the surfaces of the regular trapezoidal plate and the inverted trapezoidal plate, the clamping grooves replace shear keys, after concrete is cast in place, the prefabricated bottom plate and the cast-in-place top plate can be well bonded due to common stress, and the phenomenon of upper and lower part dislocation cannot occur under the action of external force;
5) the prefabricated bottom plate is used as a bridge construction template, is prefabricated in a factory and hoisted on site, and because the size of the segment bridge deck plate is small, the stress performance is good, pavement work can be completed only by small machinery, the construction efficiency is high, and the cost can be correspondingly reduced.
Drawings
FIG. 1 is a schematic assembly diagram of a prefabricated floor in a prefabricated assembled composite slab construction according to embodiment 1;
FIG. 2 is a top plan view of the prefabricated base panel of example 2;
FIG. 3 is a cross-sectional view of the trapezoidal plate in embodiment 2;
FIG. 4 is a schematic view showing three structures of a shear tooth according to embodiment 2;
FIG. 5 is a schematic view showing arrangement of reinforcing bars in the trapezoidal plate according to example 3;
FIG. 6 is a schematic view showing arrangement of reinforcing bars in the trapezoidal plate according to example 4;
fig. 7 is a schematic structural view of a clamping groove formed in the surface of the regular trapezoid plate in embodiment 5;
FIG. 8 is a side elevation partially schematic view of a prefabricated building block composite construction as described in example 5.
Detailed Description
The present invention will be further described with reference to the following detailed description, wherein the drawings are provided for illustrative purposes only and are not intended to be limiting; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
Example 1
The utility model provides a superimposed sheet structure is assembled in prefabrication, is applied to the bridge floor construction, including folding prefabricated bottom plate 1 and the cast-in-place roof 2 of establishing (the cast-in-place roof is seen in figure 8), prefabricated bottom plate is under, and the cast-in-place roof is in prefabricated bottom plate top, as shown in figure 1, prefabricated bottom plate 1 is formed by the positive trapezoidal plate 11 of polylith and the trapezoidal plate 12 that falls matches in proper order linking up, and positive trapezoidal plate cross section is forward trapezoidal, and the trapezoidal plate cross section that falls is down trapezoidal, positive trapezoidal plate width direction edge inclined plane and the trapezoidal plate width direction edge inclined plane adaptation that falls.
The prefabricated bottom plate of this embodiment designs into the inclined plane with board and board seam position with respectivelyly cutting out, and the inclined plane is arranged and can furthest compresses the gap between the bridge segment is assembled, and the trapezoidal board that falls makes the contact between the seam inseparabler under self action of gravity, and the atress performance is better.
The right trapezoidal plate 11 and the inverted trapezoidal plate 12 of the prefabricated bottom plate are internally provided with proper reinforcing meshes 13 (shown in figure 3), the prefabricated bottom plate 11 is made of an ultra-high performance concrete material with excellent tensile property and good durability, under the action of external load, the prefabricated bottom plate of the laminated slab mainly bears tensile force, and the cast-in-place top plate of the laminated slab mainly bears pressure, so that the thickness of the slab can be reduced, the weight of the slab is reduced, and the bearing capacity of the laminated slab is increased and the durability is improved due to the adoption of the ultra-high performance concrete material.
The prefabricated bottom plate of superimposed sheet generally adopts the mill prefabrication, and on-the-spot hoist and mount, prefabricated bottom plate can replace bridge construction template for construction speed, alleviates the dead weight, save time and cost, kills many birds with one stone, and cast-in-place roof adopts traditional technology construction, generally is ordinary concrete placement. Because the segment bridge deck has smaller size and good stress performance, the pavement work can be finished only by small machinery, and the arrangement of the reinforcing steel bars in the bridge deck is determined by the stress calculation of the bridge.
Example 2
As shown in fig. 2 and 3, in this embodiment, on the basis of embodiment 1, the shear teeth 31 are respectively extended from the inclined surfaces of the same side edges of the regular trapezoidal plate and the inverted trapezoidal plate on the prefabricated bottom plate, the inner concave teeth 32 matched with the arrangement positions of the shear teeth are respectively formed on the inclined surfaces of the other side edges of the regular trapezoidal plate and the inverted trapezoidal plate, the shear teeth 31 and the inner concave teeth 32 between the regular trapezoidal plate and the inverted trapezoidal plate can be in seamless butt joint, and the length directions of the butt-jointed regular trapezoidal plate 11 and the inverted trapezoidal plate 12 are parallel and level. Due to the existence of the concave teeth, the regular trapezoidal plate and the inverted trapezoidal plate form the same shearing force tooth-shaped structure 33 with the shearing force teeth on the edge inclined plane provided with the concave teeth.
As shown in fig. 4, the cross section of the shear tooth 31 has any one or more of a horn shape, a triangular shape or a T shape, and may have other shapes which can be engaged with each other and have a wider tooth tail end than a tooth head end.
The key function of the shear tooth is as follows: the tail ends of the shear teeth and the shear tooth-shaped structures form a 'bracket part' (see a shaded part in fig. 4) capable of transferring shear force, so that the tensile force required to be transferred between the prefabricated regular trapezoidal plate and the inverted trapezoidal plate is converted into the shear force transferred between the tooth blocks at the joint, and the joint sections of the adjacent trapezoidal plates can transfer the tensile force mutually.
Example 3
In order to enhance the strength of the prefabricated bottom plate 1, in this embodiment, on the basis of embodiment 2, reinforcing ribs are further disposed in the shear teeth 31, and meanwhile, reinforcing ribs are also disposed in the shear tooth-shaped structures 33 formed on the edge slopes provided with the concave teeth of the regular trapezoidal plate and the inverted trapezoidal plate, as shown in fig. 5, the reinforcing ribs are reinforcing bars 41 arranged around the profiles of the shear teeth and the shear tooth-shaped structures, and two free ends of the reinforcing bars are finally bound together in a crossed manner.
The setting amount of the steel bars 41 is determined according to the tensile force required to bear by the prefabricated bottom beam.
By reasonably arranging the steel bars in the shear teeth and the shear tooth-shaped structures, the capacity of bearing the tensile force of the joint section between the teeth and the non-joint section of the prefabricated bottom plate is basically equivalent.
Example 4
As shown in fig. 6, in this embodiment, the reinforcing steel bar in embodiment 3 is replaced by a steel plate, that is, the tooth surface of the applied shear tooth 31 and the tooth surface of the shear tooth structure 33 are provided with a steel plate 42, the inner end surface of the steel plate is connected with a reinforcing block 43, and the steel plate 42 and the reinforcing block 43 form a T-shaped structure.
The setting amount of the T-shaped structure is also determined according to the tensile force required to be borne by the prefabricated bottom beam.
Of course, the steel bar in embodiment 3 and the T-shaped steel plate structure in this embodiment can also be used in combination in the shear teeth and the shear tooth-shaped structure.
Example 5
In order to enhance the overall stress performance of the laminated slab, as shown in fig. 7 and 8, at least one clamping groove 5 is further formed in the surface of each of the regular trapezoidal plate 11 and the inverted trapezoidal plate 12, which is connected to the cast-in-place top plate 2, in this embodiment, the number of the clamping grooves is 3, the distance between adjacent clamping grooves 5 is 10-50 cm, the clamping grooves 5 penetrate through the length directions of the regular trapezoidal plate 11 and the inverted trapezoidal plate 12 and are parallel to the length direction, specifically, the depth of each clamping groove 5 generally needs to be less than 5mm, and the width of each clamping groove is less than 10 mm.
The reasonable draw-in groove that sets up can increase the cohesive force between prefabricated bottom plate and the cast-in-place roof, has also replaced the shear force key at the composition surface of prefabricated bottom plate and cast-in-place roof with the draw-in groove, makes things convenient for the preparation and the construction of segment decking, and cast-in-place concrete on prefabricated bottom plate treats upper portion concrete maintenance shaping back, and upper and lower portion can bond better, can not take place the upper and lower part dislocation under the effect of external force, and then avoids two plywoods to take place the dislocation, the fracture, can realize common atress well.
It should be understood that the above examples are only for clearly illustrating the technical solutions of the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The utility model provides a superimposed sheet structure is assembled in prefabrication, its characterized in that, including folding the prefabricated bottom plate and the cast-in-place roof of establishing, the prefabricated bottom plate is matchd in proper order by the positive trapezoidal plate of polylith and falls the trapezoidal plate and link up and form, positive trapezoidal plate width direction edge inclined plane and the adaptation of falling trapezoidal plate width direction edge inclined plane.
2. The prefabricated assembled composite slab structure as claimed in claim 1, wherein shear teeth are extended from inclined surfaces of the same side of the regular trapezoidal plate and the inverted trapezoidal plate on the prefabricated bottom plate, inner concave teeth matched with the arrangement positions of the shear teeth are formed on inclined surfaces of the other side of the prefabricated bottom plate, the shear teeth and the inner concave teeth between the regular trapezoidal plate and the inverted trapezoidal plate can be in seamless butt joint, and the regular trapezoidal plate and the inverted trapezoidal plate are aligned in the length direction after butt joint.
3. The prefabricated building composite slab construction of claim 2, wherein the shear teeth are any one or more of trumpet-shaped, triangular or T-shaped in cross section.
4. The prefabricated assembled composite slab structure as claimed in claim 2 or 3, wherein reinforcing ribs are arranged in the shear teeth; reinforcing ribs are distributed in a shear tooth-shaped structure formed on the edge inclined plane provided with the concave teeth of the regular trapezoidal plate and the inverted trapezoidal plate.
5. The prefabricated composite slab structure as claimed in claim 4, wherein the reinforcing ribs are reinforcing bars arranged around the profile of the shear teeth and the shear tooth-shaped structures and/or T-shaped structures formed by steel plates arranged on the tooth surfaces of the shear teeth and the shear tooth-shaped structures and reinforcing blocks connected with the steel plates.
6. The prefabricated built-up composite slab structure as claimed in claim 5, wherein the amount of the reinforcing bars and the T-shaped structures is determined according to the amount of tensile force required to be borne by the prefabricated bottom beams.
7. The prefabricated spliced composite slab structure as claimed in claim 1, wherein the regular trapezoidal plate and the inverted trapezoidal plate have at least one locking groove formed on the surface thereof respectively engaged with the cast-in-place roof plate.
8. The prefabricated built-up plate structure as claimed in claim 7, wherein the locking grooves extend through the length direction of the regular trapezoidal plate and the inverted trapezoidal plate and are parallel to the length direction.
9. The prefabricated building-up composite slab construction of claim 8, wherein the groove depth is less than 5mm and the width is less than 10 mm.
10. The prefabricated assembled composite slab structure as claimed in claim 9, wherein the distance between adjacent slots on the regular trapezoidal plate and the inverted trapezoidal plate is 10-50 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911166641.3A CN111733697A (en) | 2019-11-25 | 2019-11-25 | Prefabricated assembled composite slab structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911166641.3A CN111733697A (en) | 2019-11-25 | 2019-11-25 | Prefabricated assembled composite slab structure |
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| CN111733697A true CN111733697A (en) | 2020-10-02 |
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| CN201911166641.3A Pending CN111733697A (en) | 2019-11-25 | 2019-11-25 | Prefabricated assembled composite slab structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112663494A (en) * | 2020-12-07 | 2021-04-16 | 辽宁省交通规划设计院有限责任公司 | Composite beam bridge deck and construction method thereof |
| CN113605217A (en) * | 2021-07-08 | 2021-11-05 | 同信生态环境科技有限公司 | Structure of bridge abutment and roadbed joint and construction method |
-
2019
- 2019-11-25 CN CN201911166641.3A patent/CN111733697A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112663494A (en) * | 2020-12-07 | 2021-04-16 | 辽宁省交通规划设计院有限责任公司 | Composite beam bridge deck and construction method thereof |
| CN112663494B (en) * | 2020-12-07 | 2022-04-08 | 辽宁省交通规划设计院有限责任公司 | Composite beam bridge deck and construction method thereof |
| CN113605217A (en) * | 2021-07-08 | 2021-11-05 | 同信生态环境科技有限公司 | Structure of bridge abutment and roadbed joint and construction method |
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