CN113482210A - One-way close rib composite floor - Google Patents
One-way close rib composite floor Download PDFInfo
- Publication number
- CN113482210A CN113482210A CN202110964476.7A CN202110964476A CN113482210A CN 113482210 A CN113482210 A CN 113482210A CN 202110964476 A CN202110964476 A CN 202110964476A CN 113482210 A CN113482210 A CN 113482210A
- Authority
- CN
- China
- Prior art keywords
- prefabricated
- concrete
- ribbed
- ribs
- slab
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
- E04B5/04—Load-carrying floor structures formed substantially of prefabricated units with beams or slabs of concrete or other stone-like material, e.g. asbestos cement
- E04B5/046—Load-carrying floor structures formed substantially of prefabricated units with beams or slabs of concrete or other stone-like material, e.g. asbestos cement with beams placed with distance from another
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
A one-way multi-ribbed composite floor comprises a prefabricated multi-ribbed slab, a prefabricated superposed beam and a post-cast reinforced concrete layer, wherein the prefabricated multi-ribbed slab comprises a reinforced concrete flat plate, longitudinal ribs, transverse ribs and a reinforced truss, the prefabricated superposed beam comprises main reinforcements, stirrups and a concrete beam body, the prefabricated multi-ribbed slab is placed on the upper surface of the concrete beam body of the prefabricated superposed beam, the reinforced concrete flat plate is placed inwards on the side surface of the concrete beam body of the prefabricated superposed beam for a certain distance, the post-cast reinforced concrete layer comprises a concrete body, upper beam reinforcements, upper plate reinforcements and anti-cracking reinforcements, the anti-cracking reinforcements are arranged on the upper spliced joints in a direction perpendicular to the spliced joint direction, and the post-cast reinforced concrete layer is arranged on the prefabricated multi-ribbed slab and the upper prefabricated superposed beam. The floor system is convenient to construct, the hoisting efficiency of the prefabricated ribbed slab with the placing overhanging head is high, the shearing resistance of the end part is good, and the deformation coordination performance between ribs can be improved by combining the longitudinal ribs and the transverse partition ribs which are intersected transversely and longitudinally, so that the overload capacity under the action of local load is improved.
Description
Technical Field
The invention relates to a concrete prefabricated component, in particular to a unidirectional ribbed composite floor.
Background
Floor among the traditional building structure adopts the mode of formwork to carry out the floor usually and pours, and the formwork process is many, and the quality is difficult to control, if adopt the prefabricated building, the board is striden and generally is not more than 3 meters, otherwise need establish the support, and floor economic nature is poor, and the precast beam adopts the basket of flowers roof beam usually, and basket of flowers roof beam preparation technology is complicated, and the mould commonality can be poor. In order to reduce the cost of the floor, the inventor discloses a composite floor which is composed of a floor slab and a groove beam by using a support-free prefabricated ribbed slab, and is suitable for building structures with large load and large span, but the matched prefabricated superposed beam needs to specially reserve groove gaps matched with the cross section size and the rib spacing direction of the prefabricated ribbed slab, the groove beam has high manufacturing precision requirement, the construction is complex, and the composite floor cannot be used for construction combination with steel beams. The one-way force transmission composite floor system has the advantages of small hoisting difficulty, wide application range, large floor bearing capacity and good shearing resistance of the superposed beam surface, and has not been reported.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and provide the unidirectional force transmission composite floor system which is small in hoisting difficulty, wide in application range, large in floor bearing capacity and good in shearing resistance of the superposed beam surface.
The invention provides a one-way multi-ribbed composite floor which comprises a prefabricated multi-ribbed slab, a prefabricated superposed beam and a post-cast reinforced concrete layer, wherein the prefabricated multi-ribbed slab comprises a reinforced concrete flat plate, longitudinal ribs, transverse ribs and a reinforced truss, the reinforced concrete flat plate comprises a reinforced net piece and concrete, the reinforced net piece is embedded in the concrete, each longitudinal rib comprises longitudinal rib concrete, a bent longitudinal rib and a shearing resistant piece, the bent longitudinal rib is embedded at the lower part of the longitudinal rib concrete, the bent longitudinal rib is bent from bottom to top at the end part of the longitudinal rib concrete, the shearing resistant piece is welded and connected at the end part of the bent longitudinal rib after being bent, the shearing resistant piece is embedded in the reinforced concrete flat plate and exposed upwards to a certain height, the shearing resistant piece extends outwards for a certain distance to form a placing cantilever head, the longitudinal ribs are arranged at the lower side of the reinforced concrete flat plate at intervals, and the end part of the longitudinal rib is at a certain distance from the end part of the reinforced concrete flat plate, the transverse rib is composed of transverse rib concrete and transverse rib steel bars, the transverse rib steel bars are embedded in the lower portion of the transverse rib concrete, at least one transverse rib is transversely arranged on the lower portion of the reinforced concrete slab, the transverse rib is perpendicular to the longitudinal rib, the steel bar truss is composed of upper chord bars and web bars, at least one steel bar truss is transversely embedded in the position, close to the end portion, of the reinforced concrete slab, the steel bar truss is upwards exposed out of the reinforced concrete slab for a certain height, the steel bar truss is perpendicular to the longitudinal rib, and the longitudinal rib, the transverse rib and the reinforced concrete slab are integrally cast. The prefabricated composite beam is composed of a main reinforcement, a stirrup and a concrete beam body, wherein the main reinforcement is a common reinforcement or a prestressed reinforcement, the main reinforcement is embedded in the lower part of the concrete beam body, the stirrup is embedded in the concrete beam body and upwards exposed out of the concrete beam body at a certain height, the shear resistant piece of the prefabricated dense rib plate is arranged on the upper surface of the concrete beam body of the prefabricated composite beam, a reinforced concrete slab is arranged at a certain distance to the inner part of the side surface of the concrete beam body, a post-cast reinforced concrete layer is composed of a concrete body, a beam upper part reinforcement, a slab upper part reinforcement and an anti-cracking reinforcement, the beam upper part reinforcement is longitudinally arranged on the prefabricated composite beam, the slab upper part reinforcement comprises transversely arranged distributed reinforcements, longitudinally arranged stressed reinforcements and slab negative bending moment reinforcements arranged on the beam slab node upper parts and parallel to the stressed reinforcements, the anti-cracking reinforcement is arranged on the splicing seam upper parts and perpendicular to the splicing direction, the post-cast reinforced concrete layer is arranged on the prefabricated dense rib plate and the upper part of the prefabricated superposed beam.
The unidirectional multi-ribbed composite floor system provided by the invention also has the following accessory technical characteristics:
the shear resistant part of the prefabricated dense rib plate is a steel plate, I-shaped steel, Z-shaped steel or L-shaped steel.
The end part of the reinforced concrete slab of the prefabricated dense rib plate is flush with the shear resistant part.
And battens, plastic pipes or metal pipe fixing pieces are embedded in the longitudinal ribs of the prefabricated dense rib plates.
The longitudinal ribs and the transverse ribs of the prefabricated dense rib plates are provided with through holes for penetrating pipelines.
The distance between the stirrups of the prefabricated superposed beam and the outer edge is 50-100 mm.
And a slurry leakage prevention galvanized iron sheet is arranged at the gap between the prefabricated dense rib plates.
The upper planes on two sides of the reinforced concrete slab are provided with downward inclined slopes, and the sections of the longitudinal rib concrete and the transverse rib concrete are small at the bottom and large at the top.
Vertical shear steel bars are arranged at two ends of the longitudinal ribs, the upper portions of the shear steel bars are exposed out of the reinforced concrete slab for a certain height, and the shear steel bars are formed by bending steel bars and are S-shaped.
Lifting hooks are embedded at two ends in the longitudinal rib concrete, and the upper parts of the lifting hooks are exposed out of the reinforced concrete slab by a certain height.
Compared with the prior art, the unidirectional dense-rib composite floor provided by the invention has the following advantages:
1. the prefabricated ribbed slab with the placing cantilever head has good shearing resistance, small hoisting difficulty and high construction efficiency;
2. the prefabricated dense rib plate has large bearing capacity, realizes support-free construction and reduces the manufacturing cost;
3. the precast beam is simple to manufacture, and the mold is high in universality;
4. the prefabricated dense rib plate of the composite floor adopts the design of simply supporting and continuously designing, has good integrity and less material consumption.
Drawings
Fig. 1 is a sectional view of a unidirectional dense-rib composite floor system of the invention.
Fig. 2 is another sectional view of the unidirectional multi-ribbed composite floor system of the invention.
Fig. 3 is a sectional view of the joint of the unidirectional dense rib composite floor slab.
Fig. 4 is a perspective view of a prefabricated ribbed slab of the present invention.
Fig. 5 is a bottom view of a pre-ribbed slab of the present invention.
Fig. 6 is a bottom view of the prefabricated ribbed slab with threading holes of the present invention.
FIG. 7 is a reinforcement diagram of prefabricated ribbed slabs of the present invention.
Fig. 8 is a schematic view of a prefabricated ribbed slab steel bar truss according to the present invention.
Fig. 9 is a schematic cross-sectional view of the prefabricated composite beam according to the present invention.
Fig. 10 is a schematic view of another form of the cross section of the precast composite girder according to the present invention.
FIG. 11 is a schematic view of another form of the prefabricated ribbed panel of the present invention.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Referring to fig. 1 to 11, in an embodiment of a unidirectional multi-ribbed composite floor according to the present invention, the unidirectional multi-ribbed composite floor includes a prefabricated multi-ribbed slab 1, a prefabricated composite girder 2 and a post-cast reinforced concrete layer 3, where the prefabricated multi-ribbed slab 1 includes a reinforced concrete slab 11, longitudinal ribs 12, transverse ribs 13 and a steel bar truss 14, the reinforced concrete slab 11 includes a steel bar mesh 111 and a concrete 112, the reinforced mesh 111 is embedded in the concrete 112, the longitudinal ribs 12 include longitudinal rib concrete 121, bent longitudinal ribs 122 and shear resistant members 123, the bent longitudinal ribs 122 are embedded at lower portions of the longitudinal rib concrete 121, the bent longitudinal ribs 122 are bent from bottom to top at ends of the longitudinal rib concrete 121, the shear resistant members 123 are welded and connected at ends of the bent longitudinal ribs 122, the shear resistant members 123 are embedded in the reinforced concrete slab 11 and exposed upward at a certain height, and the shear resistant members 123 extend outward at a certain distance to form a shelf 124, the longitudinal ribs 12 are arranged at the lower side of the reinforced concrete slab 11 at intervals, the end parts of the longitudinal ribs 12 are at a certain distance from the end parts of the reinforced concrete slab 11, the transverse ribs 13 are composed of transverse rib concrete 131 and transverse rib steel bars 132, the transverse rib steel bars 132 are embedded at the lower parts of the transverse rib concrete 132, at least one transverse rib 13 is transversely arranged at the lower part of the reinforced concrete slab 11, the transverse ribs 13 are perpendicular to the longitudinal ribs 12, the reinforced truss 14 is composed of upper chord bars 141 and web bars 142, at least one reinforced truss 14 is transversely embedded at the position, close to the end part, of the reinforced concrete slab 11, the reinforced truss 14 is upwards exposed out of the reinforced concrete slab 11 at a certain height, the reinforced truss 14 is perpendicular to the longitudinal ribs 12, the transverse ribs 13 and the reinforced concrete slab 11 are cast into a whole, and the prefabricated superposed beam 2 is composed of main bars 21, stirrup 22 and hoop bars 22, The concrete beam 23 is composed, the main reinforcement 21 is a common reinforcement or a prestressed reinforcement, the main reinforcement 21 is embedded in the lower part of the concrete beam 23, the stirrup 22 is embedded in the concrete beam 23 to expose the concrete beam 23 upwards, the shear resistant member 123 of the prefabricated dense rib plate 1 is placed on the upper surface of the concrete beam 23 of the prefabricated composite beam 2, the reinforced concrete slab 11 is placed in a certain distance to the inside of the side surface of the concrete beam 23, the post-cast reinforced concrete layer 3 is composed of a concrete body 31, a beam upper reinforcement 32, a plate upper reinforcement 33 and an anti-crack reinforcement 34, the beam upper reinforcement 32 is arranged on the upper part of the prefabricated composite beam 2 along the longitudinal direction, the plate upper reinforcement 33 comprises a transversely arranged distribution reinforcement 331, a longitudinally arranged stress reinforcement 332 and a plate negative bending moment reinforcement 333 arranged on the upper part of the beam slab node and parallel to the stress reinforcement, the anti-cracking ribs 34 are arranged on the upper portions of the abutted seams in a direction perpendicular to the abutted seam direction, and the post-cast reinforced concrete layer 3 is arranged on the upper portions of the prefabricated dense rib plates 1 and the prefabricated superposed beams 2. The floor system realizes support-free construction, has high construction efficiency and large floor span, the laying cantilever head 124 greatly improves the hoisting efficiency, the laying cantilever head 124 can be directly laid on the laying surface of the prefabricated composite beam 2 to complete installation, the prefabricated composite beam 2 does not need to reserve a laying gap, the construction difficulty is greatly reduced, the shear resistant piece 123 is favorable for improving the shear strength at the end, the steel bar truss 14 does not have a lower chord rib, the effect is directly transmitted by the steel bar net piece 111 embedded in the reinforced concrete slab 11, the steel consumption can be further reduced, the steel bar truss 14 not only serves as the erecting steel bar of the cast-in-place layer negative bending moment steel bar of the composite slab, but also improves the shear strength of the composite surface of the slab, and also serves as an upturning rib of the series longitudinal ribs, the uniform longitudinal stress in the hoisting stage is ensured, the longitudinal ribs 12 are favorable for improving the rigidity and the strength of the slab, and effectively improving the bearing capacity, the transverse ribs 13 can prevent the thin plate from cracking in the processes of stripping and hoisting in the construction stage, improve the deformation coordination performance among the ribs in the use process, and improve the overload capacity under the action of local load.
Referring to fig. 2 and 10, in the embodiment of the unidirectional multi-ribbed composite floor system provided by the invention, the shear resistant member 123 of the prefabricated multi-ribbed slab 1 is a steel plate, an i-steel, a Z-steel or an L-steel. The shear resistant part can also adopt a shaped product, and the purpose is to improve the shear strength of the end part of the prefabricated dense rib plate.
Referring to fig. 11, in the embodiment of the present invention, the reinforced concrete slab 11 of the prefabricated ribbed slab 1 is flush with the shear member 123. When the shear resistant member 123 is flush with the reinforced concrete slab 11, the distance from the outer edge to the stirrup 22 corresponding to the precast composite beam 2 extends inward to 50-100 mm.
Referring to fig. 1 to 10, in the embodiment of the unidirectional multi-ribbed building cover provided by the invention, the longitudinal ribs 12 of the prefabricated multi-ribbed slab 1 are embedded with battens, plastic pipes or metal pipe fixing pieces. When the metal pipe fixing piece is used, the metal pipe fixing piece can serve as stressed steel bars of the longitudinal ribs 12, and the steel consumption is saved.
Referring to fig. 6, in the embodiment of the one-way multi-ribbed building cover according to the present invention, the longitudinal ribs 12 and the transverse ribs 13 of the prefabricated multi-ribbed slab 1 are provided with through holes 133 for passing pipes. The through-hole 133 may be used for a wire, a fire hose, or the like in a decoration work.
Referring to fig. 3, in the embodiment of the unidirectional multi-ribbed composite floor system provided by the invention, a slurry leakage-proof galvanized iron sheet 35 is arranged at the gap between the prefabricated multi-ribbed slabs 1, the upper planes at two sides of the reinforced concrete slab 11 are provided with downward inclined slopes 113, and the sections of the longitudinal rib concrete 121 and the transverse rib concrete 131 are small at the bottom and large at the top. The slope 113 is used for placing the anti-cracking ribs 34, and the leakage slurry discharging galvanized iron sheet 25 is used for placing leakage slurry when concrete is poured later.
Referring to fig. 7, in the embodiment of the unidirectional multi-ribbed composite floor according to the present invention, vertical shear reinforcements 125 are disposed at two ends of the longitudinal rib 12, upper portions of the shear reinforcements 125 are exposed out of the reinforced concrete slab 11 by a certain height, and the shear reinforcements 125 are formed by bending reinforcing steel bars and have an S-shaped shape. Vertical shear reinforcement is favorable to increasing the shear resistance of prefabricated dense floor tip, and the reinforcing bar processing of S form is convenient, but quick batch production, and efficient when reinforcement.
Referring to fig. 7, in the embodiment of the unidirectional multi-ribbed composite floor system according to the present invention, hooks 126 are embedded at two ends of the longitudinal rib concrete 121, and the upper portion of the hook 126 is exposed out of the reinforced concrete slab 11 by a certain height. The hooks 126 are used for demolding.
In the present invention, all the "certain height and certain inclination" refer to the length necessary to meet the design requirements, that is, the length required to adapt to the connection and strength requirements, and the length is clear to those skilled in the art and can be set as required.
Claims (10)
1. A one-way multi-ribbed composite floor system comprises prefabricated multi-ribbed slabs, prefabricated superposed beams and post-cast reinforced concrete layers, and is characterized in that
The prefabricated ribbed slab comprises a reinforced concrete slab, longitudinal ribs, transverse ribs and a reinforced truss, the reinforced concrete slab comprises a reinforced net piece and concrete, the reinforced net piece is embedded in the concrete, the longitudinal ribs comprise longitudinal rib concrete, bent longitudinal ribs and a shearing resistant part, the bent longitudinal ribs are embedded at the lower part of the longitudinal rib concrete, the bent longitudinal ribs are bent from bottom to top at the ends of the longitudinal rib concrete, the shearing resistant part is welded and connected at the ends of the bent longitudinal ribs after bending, the shearing resistant part is embedded in the reinforced concrete slab and upwards exposed to a certain height, the shearing resistant part outwards extends for a certain distance to form a placing cantilever, the longitudinal ribs are arranged at the lower side of the reinforced concrete slab at intervals, the ends of the longitudinal ribs are at a certain distance from the ends of the reinforced concrete slab, the transverse ribs comprise transverse rib concrete and transverse rib embedded reinforcing steel bars, the transverse rib reinforcing steel bars are arranged at the lower part of the transverse ribs, at least one transverse rib is transversely arranged at the lower part of the reinforced concrete slab, the transverse ribs are vertical to the longitudinal ribs, the steel bar trusses are composed of upper chord ribs and web ribs, at least one steel bar truss is transversely embedded at the position close to the end part of the steel bar concrete slab, the steel bar truss is upwards exposed out of the steel bar concrete slab for a certain height, the steel bar truss is vertical to the longitudinal ribs, the transverse ribs and the steel bar concrete slab are cast into a whole,
the prefabricated composite beam consists of a main reinforcement, a stirrup and a concrete beam body, wherein the main reinforcement is a common reinforcement or a prestressed reinforcement, the main reinforcement is embedded at the lower part of the concrete beam body, the stirrup is embedded in the concrete beam body and upwards exposed out of the upper surface of the concrete beam body by a certain height, the shearing resistant piece of the prefabricated dense rib plate is placed on the upper surface of the concrete beam body of the prefabricated composite beam, the reinforced concrete slab is placed at a certain distance towards the inside of the side surface of the concrete beam body,
post-cast steel bar concrete layer comprises concrete body, roof beam upper portion reinforcing bar, board upper portion reinforcing bar and anti-crack muscle, roof beam upper portion reinforcing bar is in longitudinal arrangement is followed on prefabricated superposed beam upper portion, board upper portion reinforcing bar includes transverse arrangement's distribution muscle, longitudinal arrangement's atress muscle and locates beam slab node upper portion and be on a parallel with the board hogging moment reinforcing bar that the atress muscle was arranged, anti-crack muscle is in piece upper portion perpendicular to piece direction arranges, post-cast steel bar concrete layer locates prefabricated dense floor prefabricated superposed beam upper portion.
2. A unidirectional multi-ribbed composite floor as claimed in claim 1, wherein said shear resistant member of said prefabricated multi-ribbed slab is steel plate, i-steel, Z-steel or L-steel.
3. A unidirectional multi-ribbed composite floor as claimed in claim 1, wherein the ends of said reinforced concrete slabs of said prefabricated multi-ribbed slabs are flush with said shear.
4. A unidirectional multi-ribbed composite floor as claimed in claim 1, wherein the longitudinal ribs of said prefabricated multi-ribbed slabs are embedded with battens, plastic pipes or metal pipe fasteners.
5. A unidirectional multi-ribbed composite floor as claimed in claim 1, wherein said longitudinal ribs and said transverse ribs of said prefabricated multi-ribbed panel are provided with through holes for passing pipes.
6. A one-way multi-ribbed composite floor slab as claimed in claim 1, wherein said stirrups of said precast laminated beams are spaced from the outside by 50mm to 100 mm.
7. A one-way multi-ribbed composite floor as claimed in claim 1, wherein a slurry-proof galvanized iron sheet is disposed in the gap between said prefabricated multi-ribbed slabs.
8. The unidirectional multi-ribbed composite floor system according to claim 1, wherein the upper planes of both sides of said reinforced concrete slab are provided with downward slopes, and the sections of said longitudinal rib concrete and said transverse rib concrete are small at the bottom and large at the top.
9. A unidirectional multi-ribbed composite floor as claimed in claim 1, wherein vertical shear-resistant reinforcing bars are disposed at both ends of said longitudinal ribs, the upper portions of said shear-resistant reinforcing bars are exposed from said reinforced concrete slab for a certain height, and said shear-resistant reinforcing bars are formed by bending reinforcing bars and have an S-shape.
10. The unidirectional multi-ribbed composite floor system according to claim 1, wherein hooks are embedded at two ends of the longitudinal rib concrete, and the upper portions of the hooks are exposed out of the reinforced concrete slab by a certain height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110964476.7A CN113482210A (en) | 2021-08-22 | 2021-08-22 | One-way close rib composite floor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110964476.7A CN113482210A (en) | 2021-08-22 | 2021-08-22 | One-way close rib composite floor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113482210A true CN113482210A (en) | 2021-10-08 |
Family
ID=77946104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110964476.7A Pending CN113482210A (en) | 2021-08-22 | 2021-08-22 | One-way close rib composite floor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113482210A (en) |
-
2021
- 2021-08-22 CN CN202110964476.7A patent/CN113482210A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107245934A (en) | A kind of assembled steel profiled sheet concrete combined board small box girder | |
| CN110644662A (en) | Prefabricated flat slab composite slab based on stress and splitting method thereof | |
| CN211143474U (en) | Concrete precast slab and connecting structure | |
| CN218345930U (en) | Bridge structure | |
| CN215716414U (en) | One-way close rib composite floor | |
| CN216338993U (en) | Longitudinal joint for steel-UHPC (ultra high performance concrete) assembled pi-shaped combination beam | |
| CN215252249U (en) | Connecting structure of hogging moment area of steel-concrete combined continuous beam | |
| CN113482210A (en) | One-way close rib composite floor | |
| CN114277993A (en) | Connecting joint of steel bar truss floor bearing plate and steel reinforced concrete beam and construction method thereof | |
| KR20220077373A (en) | Deck plate for pouring the bridge floor | |
| CN110778011A (en) | Concrete precast slab, connecting structure and construction method thereof | |
| CN215829741U (en) | Prefabricated dense rib plate with shelving cantilever head | |
| CN219671803U (en) | Continuous beam type double-beam plate superposed floor system | |
| CN215483937U (en) | Keel type prefabricated dense rib plate | |
| CN109853806A (en) | It overlaps concrete steel ladder mouth and splices two-way floor | |
| CN214006192U (en) | One-way dense rib superimposed floor | |
| CN218842872U (en) | Large-span bridge deck slab prefabricated construction | |
| CN219690843U (en) | Concrete prefabricated slab superposed floor structure | |
| CN214006187U (en) | Prefabricated dense rib plate | |
| CN216787644U (en) | Prefabricated assembled steel bar truss open-pore beam | |
| CN214573279U (en) | Combined bridge structure | |
| CN220565524U (en) | Large-width prestressed reinforcement truss composite floor slab | |
| CN113482211A (en) | Prefabricated dense rib plate with shelving cantilever head | |
| CN116695563A (en) | Light bridge deck of ultra-high performance concrete and steel combined structure | |
| CN116927398A (en) | Two-way dense rib steel bar truss concrete superposed floor slab |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |