CN109518858B - Assembled beam plate connecting structure and construction method thereof - Google Patents
Assembled beam plate connecting structure and construction method thereof Download PDFInfo
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- CN109518858B CN109518858B CN201910004124.XA CN201910004124A CN109518858B CN 109518858 B CN109518858 B CN 109518858B CN 201910004124 A CN201910004124 A CN 201910004124A CN 109518858 B CN109518858 B CN 109518858B
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- 238000010276 construction Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 48
- 239000010959 steel Substances 0.000 claims description 48
- 239000004567 concrete Substances 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 6
- 238000004873 anchoring Methods 0.000 description 11
- 230000002787 reinforcement Effects 0.000 description 11
- 239000004574 high-performance concrete Substances 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 238000003475 lamination Methods 0.000 description 5
- 230000003014 reinforcing effect Effects 0.000 description 5
- 238000005266 casting Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000011065 in-situ storage Methods 0.000 description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011374 ultra-high-performance concrete Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000011178 precast concrete Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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
- E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
- E04B5/17—Floor structures partly formed in situ
- E04B5/23—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated
- E04B5/28—Cross-ribbed floors
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention relates to the field of assembled buildings and discloses an assembled beam slab connecting structure and a construction method thereof. Longitudinal ribs and U-shaped stirrups are embedded in the precast slab; the longitudinal ribs are arranged along the length direction of the precast slab and extend out of the end surfaces at two ends of the precast slab; the two sides of the width direction of the precast slab are vertical rib plates, the bottom edges of the U-shaped stirrups are vertically arranged and are pre-buried in the vertical rib plates, and the two ends of the U-shaped stirrups extend outwards to form the side surfaces of the vertical rib plates, which deviate from the precast slab. Beam stirrups are embedded in the precast beam, are vertically arranged and extend upwards from the upper surface of the precast beam; the precast beam upper surface is equipped with a plurality of recesses, and the interval between the adjacent recess corresponds the setting with the interval between two vertical floor of prefabricated plate. The assembled beam plate connecting structure provided by the embodiment of the invention has good structural integrity, improves the connection force transmission performance of the main beam and the secondary beam, reduces on-site wet operation and construction procedures, and improves the construction efficiency.
Description
Technical Field
The invention relates to the field of assembled buildings, in particular to an assembled beam slab connecting structure and a construction method thereof.
Background
Prefabricated building is designed and produced with the design concept of 'equivalent cast-in-place', and then all prefabricated products are combined through a connecting process. Precast concrete members are important components of the assembled building, and are an important direction of the development of the building structure in China. Compared with the traditional cast-in-situ structure, the construction mode of factory production and assembly construction of the prefabricated components can play roles of saving energy, protecting environment, shortening construction period, saving labor and the like, and meanwhile, the construction quality of a building can be effectively controlled, and engineering accidents are reduced.
The existing prefabricated assembled beam slab structure system generally comprises prefabricated superposed main beams, prefabricated superposed secondary beams and prefabricated superposed plates, and after the prefabricated components are lifted and positioned and the reinforcing steel bars are arranged and bound, post-pouring superposition of the prefabricated components is carried out to form a superposed beam-slab system. According to the prefabricated superposed system, the longitudinal steel bars at the bottoms of the secondary beams cannot extend into the main beams, so that the connection between the main beams and the secondary beams is weak, and the structural integrity is relatively poor; the precision control requirements of prefabricated part manufacture and field construction assembly are high, steel bar collision is easy to occur, and the field construction difficulty is high and the construction efficiency is low; in addition, existing post-cast lamination requires a significant amount of on-site wet work.
Disclosure of Invention
First, the technical problem to be solved
The invention aims to provide an assembled beam plate connecting structure with good structural integrity, which can effectively improve the connection force transmission performance of a main beam and a secondary beam structure, improve the construction efficiency and reduce the field wet operation, and a construction method thereof.
(II) technical scheme
In order to solve the technical problems, the invention provides an assembled beam slab connecting structure, which comprises a precast beam and a U-shaped precast slab;
longitudinal ribs and U-shaped stirrups are embedded in the precast slab; the longitudinal ribs are arranged along the length direction of the precast slab and extend out of the end surfaces at two ends of the precast slab, and vertical rib plates are arranged at two sides of the width direction of the precast slab; the bottom edges of the U-shaped stirrups are vertically arranged and pre-buried in the vertical rib plates, and the two ends of the U-shaped stirrups extend out of the side surfaces of the vertical rib plates, which deviate from the precast slabs;
beam stirrups are embedded in the precast beam, are vertically arranged and extend upwards from the upper surface of the precast beam; the precast beam upper surface is equipped with a plurality of recesses, adjacent interval between the recess with the interval between two of precast slab the vertical floor corresponds the setting.
The horizontal part of the precast slab is also embedded with transverse ribs, and the transverse ribs are perpendicular to the longitudinal ribs.
The vertical rib plates are further embedded with vertical ribs which are arranged vertically, and the vertical ribs are connected with the transverse ribs.
The U-shaped stirrups and the vertical ribs are alternately arranged.
Wherein, a plurality of prefabricated plates connect gradually, two that are connected the U type stirrup of prefabricated plate sets up relatively.
Wherein, a plurality of that connect gradually the U-shaped opening of prefabricated plate all sets up down.
Wherein, a plurality of that connect gradually the U-shaped opening of prefabricated plate has at least one to set up.
The U-shaped stirrups in the two vertical rib plates connected with each other are arranged in a staggered mode.
The prefabricated plate comprises a vertical rib plate, wherein the vertical rib plate is arranged on the side face of the vertical rib plate, and the vertical rib plate is arranged on the side face of the vertical rib plate.
The second binding steel bars are arranged on the upper surface of the precast beam along the length direction of the precast beam, and are connected with the longitudinal steel bars and the beam stirrups in a binding mode.
The beam stirrup is U-shaped, and two ends of the U-shaped beam stirrup extend out of the upper surface of the precast beam; the precast beam is also provided with a stirrup cap which is used for connecting the U-shaped opening of the beam stirrup.
Wherein truss stirrups and plate surface stress steel bars are further arranged on the upper surface of the horizontal part of the precast slab; the truss stirrups are arranged along the length direction of the precast slab, and the slab surface stress steel bars are perpendicular to the truss stirrups; the truss stirrups are connected with the plate surface stressed steel bars in a binding mode.
The invention also provides a construction method of the assembled beam plate connecting structure, which comprises the following steps:
s10, arranging longitudinal ribs and U-shaped stirrups, and pouring concrete outside the longitudinal ribs and the U-shaped stirrups to form a precast slab; arranging beam stirrups, and pouring concrete outside the beam stirrups to form a precast beam;
s20, hoisting and positioning the precast beam and the precast slab on site, so that the horizontal part end surface of the precast slab corresponds to the upper surface of the precast beam, and the vertical rib plate end surface of the precast slab corresponds to the groove to form a second post-cast part for connecting the precast slab and the precast beam; a first post-pouring part connected with the precast slabs is formed between two opposite vertical rib plates of the adjacent precast slabs;
wherein, when the prefabricated panel is prefabricated in S10, further comprising:
s30, embedding the transverse ribs and the vertical ribs;
when the step S20 is performed to form the first post-cast part, the method further includes:
s40, carrying out site binding on the first binding steel bars and the outward extending ends of the U-shaped stirrups embedded in the two vertical rib plates adjacent to the precast slab;
when the second post-cast part is formed in S20, the method further includes:
s50, carrying out field binding on the second binding steel bars, the longitudinal bars and the beam stirrups;
the method comprises the steps of,
s60, manufacturing a pouring template for the first post-pouring part and the second post-pouring part, and respectively sticking slurry leakage preventing strips on the inner bottom and the periphery of the side surface of the pouring template for the post-pouring part;
s70, performing concrete pouring on the precast slab and the post-pouring part of the precast beam, and vibrating by using a vibrating rod; and (5) maintaining and removing the post-pouring template mold.
(III) beneficial effects
The invention provides an assembled beam plate connecting structure and a construction method thereof, wherein the assembled beam plate connecting structure comprises a precast slab and precast beams, and longitudinal ribs extending out of the end surfaces of two ends of the precast slab can be in non-contact reinforcement lap joint with beam stirrups extending out of the upper surface of the precast beams upwards; longitudinal ribs pre-buried in the vertical rib plate part of the precast slab can extend into the grooves of the precast beam. The groove arranged on the precast beam provides good steel bar connection anchoring space for the precast beam and the precast slab, so that the longitudinal steel bars of the precast slab can be connected with the steel bars in the main beam in an anchoring manner, and the problem that the steel bars of the secondary beam of the existing assembly structure cannot be connected with the main beam in an anchoring manner is solved. The U-shaped stirrups are prefabricated in the vertical rib plates, overhanging parts of the U-shaped stirrups are used as stress connection reinforcing bars for non-contact lap joint between two opposite vertical rib plates of two adjacent precast slabs to be cast in situ, connection between the precast slabs is achieved, and meanwhile, the post-cast overlapping parts and the two vertical rib plates form a secondary beam structure, so that the precast slabs can meet the requirement of a larger span. The assembled beam plate connecting structure provided by the embodiment of the invention has good structural integrity, improves the connecting force transmission performance of the main beam and the secondary beam structure, reduces on-site wet operation and construction procedures, improves the construction efficiency, only needs a small amount of supports and templates, and has strong practicability.
Drawings
FIG. 1 is a schematic view of a prefabricated panel according to an embodiment of the present invention;
fig. 2 is a schematic perspective view illustrating the arrangement of prefabricated slab reinforcement bars according to an embodiment of the present invention;
fig. 3 is a schematic plan view illustrating the arrangement of prefabricated slab reinforcement bars according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a prefabricated Liang Liti embodiment of the present invention;
FIG. 4a is a schematic cross-sectional view of a precast beam according to an embodiment of the present invention;
FIG. 5 is a schematic perspective view showing installation and positioning of prefabricated panels according to an embodiment of the present invention;
FIG. 5a is a schematic perspective view illustrating installation and positioning of prefabricated panels according to another embodiment of the present invention;
FIG. 5b is a schematic perspective view showing installation and positioning of prefabricated panels according to still another embodiment of the present invention;
FIG. 6a is a top view showing the installation and positioning of prefabricated panels according to an embodiment of the present invention;
FIG. 6b is a front view showing the installation and positioning of a prefabricated panel according to an embodiment of the present invention;
FIG. 7 is a schematic diagram showing connection of prefabricated panels according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of post-casting lamination of prefabricated panels according to an embodiment of the invention;
FIG. 8a is a schematic view of post-casting lamination of prefabricated panels according to another embodiment of the present invention;
FIG. 9 is a schematic diagram showing three-dimensional connection of prefabricated panels according to an embodiment of the present invention;
FIG. 9a is a schematic view showing a three-dimensional connection of prefabricated panels according to another embodiment of the present invention;
FIG. 10 is a schematic view showing the assembly of a precast beam and a precast slab according to an embodiment of the present invention;
FIG. 11 is a schematic view showing an assembly of a precast beam and a plurality of precast slabs according to an embodiment of the present invention;
FIG. 11a is a schematic view illustrating an assembly of a precast beam and a plurality of precast slabs according to another embodiment of the present invention;
FIG. 12 is a schematic view of a beam-slab connection structure according to an embodiment of the present invention;
FIG. 12a is a schematic view of a beam-slab connection structure according to another embodiment of the present invention;
FIG. 13 is a schematic view of the bottom of a beam-slab joint structure according to an embodiment of the present invention;
FIG. 14 is a schematic view of a truss stirrup arrangement in accordance with an embodiment of the present invention;
fig. 15 is a schematic view of a plate surface stress steel bar arrangement according to an embodiment of the present invention;
FIG. 16 is a schematic view of a laminate according to an embodiment of the present invention;
in the figure: 1. a prefabricated plate; 2. vertical rib plates; 3. a horizontal plate; 4. longitudinal ribs; 5. u-shaped stirrups; 6. transverse ribs; 7. prefabricating a beam; 8. a groove; 9. beam stirrups; 10. a stirrup cap; 11. a first tie bar; 12. a first post-cast part; 13. truss stirrups; 14. plate surface stress steel bars; 15. laminating the laminate; 16. vertical ribs.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.
Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality", "a plurality of groups" is two or more.
As shown in fig. 1, 2, 3 and 4, the assembled beam slab connecting structure provided by the embodiment of the invention comprises a precast beam 7 and a U-shaped precast slab 1. Longitudinal ribs 4 and U-shaped stirrups 5 are embedded in the precast slab 1; the longitudinal ribs 4 are arranged along the length direction of the precast slab 1 and extend out of the end surfaces of the two ends of the precast slab 1; the two sides of the width direction of the precast slab 1 are vertical rib plates 2, the bottom edges of the U-shaped stirrups 5 are vertically arranged and are pre-buried in the vertical rib plates 2, and the two ends of the U-shaped stirrups 5 extend out of the side surfaces of the vertical rib plates 2, which deviate from the precast slab 1. The beam stirrup 9 is embedded in the precast beam 7, the beam stirrup 9 is vertically arranged and extends upwards to the upper surface of the precast beam 7; the upper surface of the precast beam 7 is provided with a plurality of grooves 8, and the interval between the adjacent grooves 8 is correspondingly arranged with the interval between the two vertical rib plates 2 of the precast slab 1.
The existing assembled beam-slab connecting structure generally comprises prefabricated main beams, secondary beams and slabs, after the prefabricated components are lifted, positioned and bound by the arrangement of the reinforcing steel bars, the prefabricated components are post-poured and overlapped to form a superposed beam-slab system, but as the longitudinal reinforcing steel bars at the bottom of the secondary beams cannot extend into the main beams, the connection between the main beams and the secondary beams is weak, and the structural integrity is relatively poor; the prefabricated component is manufactured, the precision control requirement of field construction assembly is high, steel bar collision is easy to happen, and the field construction difficulty is high and the construction efficiency is low. The assembled beam slab connecting structure provided by the embodiment of the invention comprises a precast slab 1 and precast beams 7, wherein the precast secondary beams in the previous structure are structurally split to serve as vertical rib plates 2 of the precast slab 1, grooves 8 matched with the vertical rib plates 2 are formed in the precast beams 7, and longitudinal ribs 4 extending out of the end surfaces of two ends of the precast slab 1 can be in non-contact reinforcement lap joint with beam stirrups 9 extending upwards out of the upper surface of the precast beam 7; the longitudinal ribs 4 pre-buried in the vertical rib plate 2 part of the precast slab 1 can extend into the grooves 8 of the precast beam 7. The groove 8 arranged on the precast beam 7 provides good steel bar connection anchoring space for the precast beam 7 and the precast slab 1, so that the longitudinal steel bars 4 of the precast slab 1 can be connected with the steel bars in the main beam in an anchoring manner, and the problem that the steel bars of the secondary beam of the existing assembled structure cannot be connected with the main beam in an anchoring manner is solved. The U-shaped stirrup 5 is prefabricated in the vertical rib plate 2, the bottom edge of the U-shaped stirrup 5 is pre-buried in the vertical rib plate 2 in the vertical direction, and the two ends of the U-shaped stirrup 5 extend out of the side surface of the vertical rib plate 2, which is away from the precast slab 1. In this way, the overhanging parts of the U-shaped stirrups 5 are used as stress connection reinforcing bars for non-contact lap joint between the two opposite vertical rib plates 2 of the two adjacent precast slabs 1 to perform cast-in-situ, so that the connection between the precast slabs 1 is realized, and meanwhile, the post-cast overlapping parts and the two vertical rib plates 2 form a secondary beam structure, so that the precast slabs 1 can meet the requirement of larger span.
According to the assembled beam slab connecting structure provided by the embodiment of the invention, the overhanging steel bars at the two ends of the precast slab 1 can extend into the precast beam 7 to effectively perform steel bar anchoring connection, so that the assembled beam slab connecting structure has good structural integrity, improves the connection force transmission performance of a main beam and a secondary beam structure, reduces field wet operation and construction procedures, improves the construction efficiency, only needs a small amount of supports and templates, and has strong practicability.
The prefabricated beam slab connecting structure provided by the embodiment of the invention comprises prefabricated slabs 1 and prefabricated members of the prefabricated beams 7, which can be connected by adopting a non-contact reinforcement lapping technology. The non-contact steel bar lapping technology is characterized in that a high-performance concrete material is used as a post-pouring overlapping belt between prefabricated parts, the post-pouring overlapping connection is carried out on the connecting joint parts of the prefabricated parts, and the characteristics of high strength, high toughness, self-tightness, micro expansion and the like of the high-performance concrete material are combined to form effective constraint force on the connecting steel bars, so that continuous force transmission between the prefabricated parts is realized, and the positioning fault tolerance rate of the prefabricated parts in the links of design, production, transportation and construction is improved, and the assembly construction efficiency is improved. High performance concrete includes, but is not limited to, RPC (reactive powder concrete), HPC (high performance concrete), UHPC (ultra high performance concrete), ECC (engineering fiber reinforced cement based composite), and the like.
According to the assembled beam slab connecting structure provided by the embodiment of the invention, the U-shaped precast slab 1 can be composed of the vertical rib plates 2 on the two side surfaces and the horizontal slab 3 on the upper side. The modular reinforcement can be customized according to the structural reinforcement calculation, process optimization, hoisting requirements and the like. A transverse rib 6 perpendicular to the longitudinal rib 4 can be pre-embedded in the horizontal plate 3 part on the upper side of the precast slab 1; in the vertical rib plates 2 at two sides of the precast slab 1, vertical pre-buried vertical ribs 16 are vertically pre-buried, the vertical ribs 16 can be connected with the transverse ribs 6, for example, the transverse ribs 6 and the vertical ribs 16 can be integrated, and are formed by bending and processing one steel bar at two ends respectively, and the transverse ribs 6 and the vertical ribs 16 bent at the two ends are U-shaped as a whole; the vertical ribs 16 and the U-shaped stirrups 5 pre-buried in the vertical rib plates 2 can be alternately arranged. By embedding the transverse ribs 6 and the vertical ribs 16, the structural strength of the precast slab 1 is improved.
The prefabricated plates 1 can be connected in sequence, wherein U-shaped stirrups 5 of the two connected prefabricated plates 1 are arranged oppositely, and the vertical rib plates 2 of the two connected prefabricated plates 1 are connected in post-cast superposition. Wherein, the U-shaped openings of a plurality of prefabricated boards 1 that connect gradually can all set up down, and the horizontal plate 3 of prefabricated board 1 is connected and is formed the floor level. In the actual beam slab structure, there is a structural form that the slab top elevation of the partial slab is lower than the elevation of the slab on the same floor, for example, the same-floor drainage structure of a bathroom, a kitchen and a balcony and other partial slab lowering structure requirements are met, and the U-shaped opening of the partial prefabricated slab 1 can be upwards arranged, as shown in fig. 5a, 8a, 9a, 11a and 12a, so that the slab elevation is lowered. U-shaped stirrups 5 in two vertical rib plates 2 connected by post-pouring superposition of adjacent precast slabs 1 can be arranged in a staggered manner in the horizontal direction, so that the connection overall performance of the post-pouring superposition of the two precast slabs 1 is improved. In addition, as shown in fig. 5b, the prefabricated panel 1 according to the embodiment of the present invention is not limited to be U-shaped, but may be L-shaped.
Two vertical rib plates 2 that two adjacent prefabricated plates 1 are connected through post-cast coincide correspond to a recess 8 of precast beam 7, and as shown in fig. 5, fig. 6a, fig. 6b, can set up the first ligature reinforcing bar 11 parallel with vertical muscle 4 in two adjacent prefabricated plate 1 post-cast coincide connected position, and first ligature reinforcing bar 11 is connected with the partial ligature of the outer vertical rib plate 2 side of U type stirrup 5, improves two prefabricated plate 1 post-cast coincide's joint strength.
It should be noted that, as shown in fig. 14, 15 and 16, the prefabricated slab 1 according to the embodiment of the present invention may also be provided with truss stirrups 13 and slab stress reinforcements 14 on the upper surface of the horizontal slab 3, where the thickness of the horizontal slab 3 may be equal to or greater than 60mm. After the hoisting and positioning of the precast slabs 1 and the post-pouring superposition are completed, the vertical truss stirrups 13 bind the stressed steel bars 14 on the plate surfaces of the horizontal parts of the connected precast slabs 1, concrete pouring is carried out, and a superposition laminate 15 integrally arranged on the horizontal parts of the connected precast slabs 1 is formed, so that the structural integrity is further improved. The post-pouring lamination pouring of the laminated floor layer 15 can be performed by adopting common concrete, so that the cost is reduced.
According to the assembled beam plate connecting structure provided by the embodiment of the invention, the prefabricated beam 7 can be designed to meet various design index requirements through comprehensive structural reinforcement calculation, process optimization, hoisting stress requirements and the like. The second binding steel bars can be arranged on the upper surface of the precast beam 7 along the length direction of the precast beam 7 and used for being bound and connected with the longitudinal steel bars 4 and the beam stirrups 9, so that the connection strength of post-pouring superposition of the precast slab 1 and the precast beam 7 is enhanced. Further, as shown in fig. 4a, the beam stirrup 9 of the precast beam 7 may be U-shaped, and both ends of the U-shaped beam stirrup 9 protrude out of the upper surface of the precast beam 7. And meanwhile, the stirrup cap 10 is arranged for connecting the U-shaped opening of the beam stirrup 9, so that the structural strength after post-pouring lamination is improved. The open stirrup structure and the stirrup cap 10 are arranged, so that the penetrating and binding construction of the second binding steel bars and the beam stirrups 9 can be facilitated.
As shown in fig. 7, 8, 9, 10, 11, 12 and 13, the invention also provides a construction method of the assembled beam-slab connecting structure, which can comprise the following steps:
s10, arranging longitudinal ribs 4 and U-shaped stirrups 5, and pouring concrete outside the longitudinal ribs 4 and the U-shaped stirrups 5 to form a precast slab 1; and arranging beam stirrups 9, and pouring concrete outside the beam stirrups 9 to form the precast beam 7. The prefabricated plate 1 and the prefabricated beam 7 can be designed according to structural reinforcement calculation, process optimization, hoisting requirements and the like, and industrial production can be carried out.
S20, hoisting and positioning the precast beam 7 and the precast slab 1 on site, so that the end surface of the horizontal part of the precast slab 1 corresponds to the upper surface of the precast beam 7, and the end surface of the vertical rib plate 2 of the precast slab 1 corresponds to the groove 8, so as to form a second post-pouring part for connecting the precast slab 1 and the precast beam 7; a first post-pouring part 12 connected with the precast slabs 1 is formed between two opposite vertical rib plates 2 of the adjacent precast slabs 1.
In S10 prefabricating the prefabricated panel 1, it may further include: s30, embedding the transverse ribs 6 and the vertical ribs 16.
When forming the first post-cast portion 12 in S20, it may further include: s40, carrying out site binding on the first binding steel bars 11 and the overhanging ends of the U-shaped stirrups 5 embedded in the two vertical rib plates 2 of the adjacent precast slabs 1.
When the second post-cast portion is formed in S20, it may further include: s50, carrying out site binding on the second binding steel bars, the longitudinal bars 4 and the beam stirrups 9.
The construction method of the assembled beam plate connecting structure provided by the invention can further comprise the following steps:
s60, manufacturing casting templates of the first post-cast part 12 and the second post-cast part, and respectively sticking slurry leakage preventing strips on the periphery of the bottom and the side surface in the casting templates of the post-cast part.
And S70, pouring high-performance concrete at the post-pouring positions of the precast slab 1 and the precast beam 7, and vibrating by using a vibrating rod to ensure that the concrete at the connecting positions is compact. And curing and removing the post-pouring template mold, and removing the template mold after curing, checking and detecting post-pouring superposition parts of the assembled beam slab connecting structure, so as to ensure the quality of connecting nodes of the assembled beam slab connecting structure.
As can be seen from the above embodiments, the present invention provides an assembled beam-slab connection structure and a construction method thereof, wherein the assembled beam-slab connection structure comprises a prefabricated slab 1 and a prefabricated beam 7, and longitudinal ribs 4 extending out of both end surfaces of the prefabricated slab 1 can be in non-contact reinforcement lap joint with beam stirrups 9 extending out of the upper surface of the prefabricated beam 7; the longitudinal ribs 4 pre-buried in the vertical rib plate 2 part of the precast slab 1 can extend into the grooves 8 of the precast beam 7. The groove 8 arranged on the precast beam 7 provides good steel bar connection anchoring space for the precast beam 7 and the precast slab 1, so that the longitudinal steel bars 4 of the precast slab 1 can be connected with the steel bars in the main beam in an anchoring manner, and the problem that the steel bars of the secondary beam of the existing assembled structure cannot be connected with the main beam in an anchoring manner is solved. The U-shaped stirrups 5 are prefabricated in the vertical rib plates 2, overhanging parts of the U-shaped stirrups 5 serve as stress connection reinforcing bars for non-contact lap joint between two opposite vertical rib plates 2 of two adjacent precast slabs 1 to be cast in situ, connection between the precast slabs 1 is achieved, and meanwhile, a secondary beam structure is formed by a post-cast overlapping part and the two vertical rib plates 2, so that the precast slabs 1 can meet the requirement of a larger span. According to the assembled beam slab connecting structure provided by the embodiment of the invention, the overhanging steel bars at the two ends of the precast slab 1 can extend into the precast beam 7 to effectively perform steel bar anchoring connection, so that the assembled beam slab connecting structure has good structural integrity, improves the connection force transmission performance of a main beam and a secondary beam structure, reduces field wet operation and construction procedures, improves the construction efficiency, only needs a small amount of supports and templates, and has strong practicability. In order to improve the structural strength of the prefabricated slab 1, the fabricated beam slab connecting structure provided by the embodiment of the invention can pre-embed the transverse ribs 6 and the vertical ribs 16 in the prefabricated slab 1, and the vertical ribs 16 and the U-shaped stirrups 5 can be alternately arranged. In order to improve the connection strength of the post-pouring overlapped part, a first binding steel bar 11 can be arranged at the connection part of the post-pouring overlapped parts of two adjacent precast slabs 1 and is bound and connected with the part of the U-shaped stirrup 5, which extends out of the outer side surface of the vertical rib plate 2; and a second binding steel bar is arranged on the upper surface of the precast beam 7 along the length direction of the precast beam 7 and is used for binding and connecting with the longitudinal steel bar 4 and the beam stirrup 9. The U-shaped stirrups 5 of the two vertical rib plates 2 connected by post-pouring superposition of the adjacent precast slabs 1 can be arranged in a staggered way.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (7)
1. The assembled beam slab connecting structure is characterized by comprising a precast beam and a U-shaped precast slab;
longitudinal ribs and U-shaped stirrups are embedded in the precast slab; the longitudinal ribs are arranged along the length direction of the precast slab and extend out of the end surfaces at two ends of the precast slab, and vertical rib plates are arranged at two sides of the width direction of the precast slab; the bottom edges of the U-shaped stirrups are vertically arranged and pre-buried in the vertical rib plates, and the two ends of the U-shaped stirrups extend out of the side surfaces of the vertical rib plates, which deviate from the precast slabs;
beam stirrups are embedded in the precast beam, are vertically arranged and extend upwards from the upper surface of the precast beam; the upper surface of the precast beam is provided with a plurality of grooves, and the interval between every two adjacent grooves is correspondingly arranged with the interval between two vertical rib plates of the precast slab;
horizontal ribs are pre-embedded in the horizontal part of the precast slab, and the horizontal ribs are perpendicular to the longitudinal ribs;
the vertical rib plates are further embedded with vertical ribs which are arranged vertically, and the vertical ribs are connected with the transverse ribs;
the U-shaped stirrups and the vertical ribs are alternately arranged;
at least one longitudinal rib is arranged between the vertical rib and the bottom edge of the U-shaped stirrup;
the first binding steel bars are arranged at the connecting parts of two adjacent precast slabs, and are bound and connected with the parts, extending out of the side surfaces of the vertical rib plates, of the U-shaped stirrups;
the second binding steel bars are arranged on the upper surface of the precast beam along the length direction of the precast beam, and are in binding connection with the longitudinal steel bars and the beam stirrups;
the beam stirrup is U-shaped, and two ends of the U-shaped beam stirrup extend out of the upper surface of the precast beam; the precast beam is also provided with a stirrup cap which is used for connecting a U-shaped opening of the beam stirrup;
truss stirrups and plate surface stress steel bars are further arranged on the upper surface of the horizontal part of the precast slab; the truss stirrups are arranged along the length direction of the precast slab, and the slab surface stress steel bars are perpendicular to the truss stirrups; the truss stirrups are connected with the plate surface stressed steel bars in a binding mode.
2. The fabricated beam-slab connection structure according to claim 1, wherein a plurality of the prefabricated slabs are connected in sequence, and U-shaped stirrups of the two connected prefabricated slabs are arranged oppositely.
3. The fabricated beam-slab connection structure according to claim 2, wherein the plurality of prefabricated slabs connected in sequence are all provided with the U-shaped openings facing downward.
4. The fabricated beam-slab connection structure according to claim 2, wherein at least one of the U-shaped openings of the plurality of prefabricated slabs connected in sequence is provided upward.
5. The fabricated beam-slab connection structure according to claim 2, wherein the U-shaped stirrups in the two connected vertical ribs are staggered.
6. The construction method of the fabricated beam-slab connection structure according to any one of claims 1 to 5, comprising:
s10, arranging longitudinal ribs and U-shaped stirrups, and pouring concrete outside the longitudinal ribs and the U-shaped stirrups to form a precast slab; arranging beam stirrups, and pouring concrete outside the beam stirrups to form a precast beam;
s20, hoisting and positioning the precast beam and the precast slab on site, so that the horizontal part end surface of the precast slab corresponds to the upper surface of the precast beam, and the vertical rib plate end surface of the precast slab corresponds to the groove to form a second post-cast part for connecting the precast slab and the precast beam; and a first post-pouring part connected with the precast slabs is formed between two opposite vertical rib plates of the adjacent precast slabs.
7. The construction method of the fabricated beam-slab connection structure according to claim 6, further comprising, when the prefabricated slab is prefabricated in S10:
s30, embedding the transverse ribs and the vertical ribs;
when the step S20 is performed to form the first post-cast part, the method further includes:
s40, carrying out site binding on the first binding steel bars and the outward extending ends of the U-shaped stirrups embedded in the two vertical rib plates adjacent to the precast slab;
when the second post-cast part is formed in S20, the method further includes:
s50, carrying out field binding on the second binding steel bars, the longitudinal bars and the beam stirrups;
the method comprises the steps of,
s60, manufacturing a pouring template for the first post-pouring part and the second post-pouring part, and respectively sticking slurry leakage preventing strips on the inner bottom and the periphery of the side surface of the pouring template for the post-pouring part;
s70, performing concrete pouring on the precast slab and the post-pouring part of the precast beam, and vibrating by using a vibrating rod; and (5) maintaining and removing the post-pouring template mold.
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| CN110712290B (en) * | 2019-10-29 | 2024-06-07 | 山东汇富建设集团建筑工业有限公司 | Preparation process of precast beam |
| CN111734030A (en) * | 2020-07-06 | 2020-10-02 | 中铁二十三局集团第四工程有限公司 | Mounting construction method for prefabricated building laminated slab |
| CN112196186A (en) * | 2020-09-07 | 2021-01-08 | 新疆农业大学 | Assembly type multi-ribbed framework, assembly type composite wall beam and wall beam prefabricating method |
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| CN113027022A (en) * | 2021-03-18 | 2021-06-25 | 青岛腾远设计事务所有限公司 | Fully-precast concrete plate cap component and construction method thereof |
| CN114086711B (en) * | 2021-11-30 | 2023-04-14 | 中国建筑第五工程局有限公司 | Building assembly containing hilt-shaped reinforced concrete prefabricated slab and construction method thereof |
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