CN220580619U - Multi-ribbed floor slab composite reinforcing structure based on precast slab and steel strand wires - Google Patents
Multi-ribbed floor slab composite reinforcing structure based on precast slab and steel strand wires Download PDFInfo
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- CN220580619U CN220580619U CN202322114713.8U CN202322114713U CN220580619U CN 220580619 U CN220580619 U CN 220580619U CN 202322114713 U CN202322114713 U CN 202322114713U CN 220580619 U CN220580619 U CN 220580619U
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- floor slab
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- slabs
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 100
- 239000010959 steel Substances 0.000 title claims abstract description 100
- 239000002131 composite material Substances 0.000 title claims abstract description 21
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 14
- 239000011374 ultra-high-performance concrete Substances 0.000 claims abstract description 28
- 230000002787 reinforcement Effects 0.000 claims abstract description 23
- 238000005507 spraying Methods 0.000 claims abstract description 12
- 239000007921 spray Substances 0.000 claims abstract description 6
- 238000011065 in-situ storage Methods 0.000 claims description 13
- 239000004567 concrete Substances 0.000 claims description 11
- 239000011449 brick Substances 0.000 claims description 6
- 238000010276 construction Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 239000011378 shotcrete Substances 0.000 abstract description 4
- 238000005336 cracking Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 17
- 239000011464 hollow brick Substances 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004574 high-performance concrete Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a multi-ribbed floor slab composite reinforcement structure based on precast slabs and steel strands, which comprises precast slabs arranged on the upper surface of a floor slab; the spraying layer is arranged on the lower surface of the floor slab; the position of the spraying layer corresponds to the precast slab up and down; the steel strands are arranged in the spray layers, one end of each steel strand close to the outer wall penetrates through the outer wall and is connected with the fixing piece, and the other end penetrates through the floor slab and is connected with the precast slab; and a hook bolt is also connected between the precast slab and the steel strand. The utility model has the advantages that in order to improve the bearing capacity and rigidity, the ribbed floor slab is reinforced by adopting a mode of combining the prestress steel strand, the ultra-high performance concrete precast slab, the hook head bolt and the ultra-high performance sprayed concrete, the bonding effect of the reinforcing structure and the original structure is good, the cracking resistance and the durability are better, the integrity is stronger, the bearing capacity and the rigidity of the ribbed floor slab can be effectively improved, the net height of the floor after the reinforcing construction is finished is almost unchanged, and the building space is not greatly influenced.
Description
Technical Field
The utility model relates to the technical field of building repair, in particular to a multi-ribbed floor slab composite reinforcing structure based on precast slabs and steel strands.
Background
When the old building is reinforced and reformed, how to apply the technology in the reinforcement and repair to make the old building a sustainable building is a problem to be studied urgently.
Part of the floor slabs of the historical building adopt multi-ribbed hollow brick floor slabs. Because of long time, the structural damage of part of the multi-ribbed hollow brick floor slab exists to different degrees, and the main phenomena are peeling of a concrete protective layer at the bottom of the rib beam, exposed reinforcing steel bars, corrosion and the like, which affect the service life and the safety of the multi-ribbed hollow brick floor slab. At present, after the construction of a plurality of reinforcement means is finished, the net height of the floor can be reduced by at least 60mm, and meanwhile, the dead weight of the floor is greatly increased.
Disclosure of Invention
According to the defects of the prior art, the utility model provides the composite reinforcement structure of the ribbed floor slab based on the precast slabs and the steel strands, which effectively improves the bearing capacity and the rigidity of the ribbed floor slab by adopting a mode of combining the prestressed steel strands, the ultra-high performance concrete precast slabs, the hook head bolts and the ultra-high performance sprayed concrete, and has almost unchanged floor clear height after the reinforcement construction is finished, and has no great influence on the building space.
The utility model is realized by the following technical scheme:
a multi-ribbed floor composite reinforcement structure based on precast slabs and steel strands, wherein, include:
a plurality of precast slabs which are installed on the upper surface of the floor slab and are distributed at intervals in the horizontal direction;
the spray layers are arranged on the lower surface of the floor slab and positioned between the outer wall and the original cast-in-situ beam or between the adjacent original cast-in-situ beams;
the position of the spraying layer corresponds to the precast slab up and down;
a plurality of spraying layers are internally provided with steel strands, one end of each steel strand, which is close to the outer wall, passes through the outer wall and is connected with a fixing piece, and the other end of each steel strand passes through the floor slab and is connected with the precast slab;
and a hook bolt is also connected between the precast slab and the steel strand.
Optionally, a plurality of elbow bolt holes which are uniformly distributed are penetratingly arranged on the surface of the precast slab, and the positions of the elbow bolt holes correspond to the positions of the dense rib beams among the porous bricks in the floor range corresponding to the lower part of the precast slab.
Optionally, one end of the hook bolt is connected with the steel strand, and the other end of the hook bolt passes through the multi-ribbed beam and the elbow bolt hole to be connected with the bolt.
Optionally, reserved steel bar joints are arranged on the surfaces of two adjacent precast slabs, one end of each steel strand between the outer wall and the original cast-in-situ beam is connected to the reserved steel bar joint of the adjacent precast slab, and two ends of each steel strand between the adjacent original cast-in-situ beams are respectively connected to the reserved steel bar joints of the corresponding adjacent precast slabs.
Optionally, the spraying layer is provided with a diverter at the corner where the steel strand is connected with the adjacent precast slab.
Optionally, the number of the steel strands is consistent with the number of the reserved steel bar joints, and a plurality of longitudinal distributing ribs and a plurality of transverse distributing ribs are arranged between the radially adjacent steel strands in the spraying layer.
Optionally, the fixing piece comprises a pressure-bearing steel plate attached to the outer wall and an anchor device contacted with the pressure-bearing steel plate, and the steel stranded wires penetrate through the pressure-bearing steel plate and the anchor device and are fixed with the outer wall.
Optionally, concrete is filled between the elbow bolt hole, the hook head bolt and the bolt.
Optionally, wet joints are left among the precast slabs distributed longitudinally and transversely at intervals, and concrete is filled in the wet joints.
Optionally, the precast slab is an ultra-high performance concrete precast slab.
The utility model has the advantages that:
the reinforcing structure aims at part of the ribbed floor slabs in the historical building, adopts a mode of combining prestressed steel strands, an ultra-high performance concrete precast slab, a hook head bolt and ultra-high performance sprayed concrete to reinforce the ribbed floor slabs, has good bonding effect with the original structure, better cracking resistance and durability, and stronger integrity, can effectively improve the bearing capacity and rigidity of the ribbed floor slabs, almost does not change the net height of floors after reinforcing construction is finished, and has no great influence on building space. The reinforcement structure has the advantages of strong pertinence, small influence on the original building structure, good reinforcement effect, fast progress, low engineering cost and the like.
Drawings
FIG. 1 is a schematic structural view of a composite reinforcement structure of the present utility model;
FIG. 2 is a top view of the composite reinforcing structure of the present utility model;
FIG. 3 is a schematic view of a part of a composite reinforcement structure according to the present utility model;
FIG. 4 is a schematic structural view of a prefabricated panel according to the present utility model;
fig. 5 is an enlarged schematic view of the present utility model at a portion a in fig. 3.
Detailed Description
The marks in the figure are respectively: 1. the concrete slab comprises an outer wall, 2, a floor slab, 3, an original cast-in-situ beam, 4, a multi-ribbed beam, 5, porous bricks, 6, steel strands, 7, transverse distribution ribs, 8, a pressure-bearing steel plate, 9, an anchorage device, 10, a steering gear, 11, a precast slab, 12, a hook head bolt, 13, a reserved steel bar joint, 14, a spray layer, 15, a wet joint, 16 and an elbow bolt hole.
Examples: referring to fig. 1 to 5, there is shown an embodiment of a multi-ribbed floor slab composite reinforcement structure based on precast slabs and steel strands, wherein the multi-ribbed floor slab composite reinforcement structure comprises a plurality of precast slabs 11 installed on the upper surface of a floor slab 2 and longitudinally and horizontally spaced apart; the spray layers 14 are arranged on the lower surface of the floor slab 2 and positioned between the outer wall 1 and the original cast-in-situ beam 3 or between the adjacent original cast-in-situ beams 3; the position of the spraying layer 14 corresponds to the precast slab 11 up and down; the steel strands 6 are arranged in the spray layers 14, one end of each steel strand 6 close to the outer wall 1 penetrates through the outer wall 1 and is connected with the fixing piece, and the other end penetrates through the floor slab 2 and is connected with the precast slab 11; a hook bolt 12 is also connected between the precast slab 11 and the steel strand 6.
In this embodiment, a plurality of uniformly distributed elbow bolt holes 16 are provided on the surface of the precast slab 11, and the positions of the elbow bolt holes 16 correspond to the positions of the dense rib beams 4 between the porous bricks 5 in the range of the floor slab 2 corresponding to the lower side of the precast slab 11.
In this embodiment, one end of the hook bolt 12 is connected to the stranded wire 6, and the other end passes through the multi-ribbed beam 4 and the elbow bolt hole 16 to be connected to a bolt (not shown).
In this embodiment, reserved steel bar joints 13 are disposed on the surfaces of two adjacent precast slabs 11, one end of a steel strand 6 located between an outer wall 1 and an original cast-in-situ beam 3 is connected to the reserved steel bar joint 13 of the adjacent precast slab 11, and two ends of the steel strand 6 located between the adjacent original cast-in-situ beams 3 are respectively connected to the reserved steel bar joints 13 of the corresponding adjacent precast slabs 11.
In this embodiment, the sprayed layer 14 is provided with a deflector 10 at the corner where the steel strand 6 is connected to the adjacent prefabricated panel 11.
In this embodiment, the number of steel strands 6 is identical to the number of reserved reinforcing joints 13, and a plurality of longitudinal distributing ribs (not shown) and a plurality of transverse distributing ribs (not shown) are provided between radially adjacent steel strands 6 in the sprayed layer 14.
In this embodiment, the fixing member includes a pressure-bearing steel plate 8 attached to the outer wall 1 and an anchor 9 in contact with the pressure-bearing steel plate 8, and the steel strand 6 passes through the pressure-bearing steel plate 8 and the anchor 9 and is fixed to the outer wall 1.
In this embodiment, the elbow bolt hole 16 is filled with concrete between the hook bolt 12 and the bolt.
In this embodiment, wet joints 15 are left between the precast slabs 11 distributed vertically and horizontally at intervals, and concrete is filled in the wet joints 15.
In this embodiment, the prefabricated panel 11 is an ultra-high performance concrete prefabricated panel.
The features and functions of the present utility model will be further understood from the following description.
The utility model aims to provide a method for compositely reinforcing the existing building ribbed floor slab based on a prefabricated ultra-high performance concrete slab (hereinafter called a prefabricated UHPC slab) and prestressed steel strands according to the defects of the prior art.
The utility model completely shovels the upper and lower finishing layers of the ribbed floor slab 2 to the structural layer, a prefabricated UHPC plate 11 is arranged at the upper part of the original floor slab 2, the thickness is 30mm, a wet joint 15 with 100mm is reserved between adjacent prefabricated UHPC plates 11, a plurality of hook bolt holes 16 are reserved in the middle of the prefabricated UHPC plate 11, the spacing is kept consistent with the spacing of the ribbed beams 4 of the floor slab, and a reserved steel bar joint 13 of a reserved elbow in the short side direction of the prefabricated UHPC plate 11 is connected with the prestressed steel strand 6. The lower part of the original floor slab 2 is provided with longitudinal prestressed steel strands 6, the arrangement interval is 600mm, the arrangement mode comprises two modes, one section of the prestressed steel strands 6 close to the wall body of the outer wall 1 is connected by adopting an anchorage device, one end of each prestressed steel strand penetrates through the floor slab 2 to be connected with the adjacent upper prefabricated UHPC board 11, and the two ends of each prestressed steel strand 6 penetrate through the floor slab 2 to be connected with the adjacent upper prefabricated UHPC board 11 in the middle part. The steering gear 10 is arranged at the turning part of the prestress steel strand 6, and is made of semicircular metal, so that stress concentration at the turning part can be effectively avoided, and the prestress is ensured to be uniformly transferred in the steel strand 6. The hook head bolts 12 penetrate through the prefabricated UHPC plate 11, the floor slab 2 and the multi-ribbed beam 4 to be connected with the lower prestressed steel strand 6, and after the installation is finished, the steel strand 6 is prestressed through the upper bolts; uniformly arranging transverse steel bars and longitudinal steel bars at the lower part of the floor slab 2, wherein the arrangement interval is 200mm, and performing UHPC concrete spraying on the lower part of the floor slab 2 of the multi-ribbed porous brick 5 after the arrangement of the steel bars is completed to form a spraying layer 14, wherein the thickness of the sprayed UHPC reinforcing layer is controlled to be 20mm; the reserved wet joint 15 between the upper plates and the elbow bolt holes 16 of the hook head bolts 12 are poured by adopting high-grade concrete.
The construction steps of the reinforced structure of the utility model include:
step 1), all finishing surface layers at the upper part and the lower part of the ribbed floor slab 2 are shoveled out until the finishing surface layers are shoveled out to a structural layer;
step 2) arranging a prefabricated UHPC board 11 on the upper part of the original floor slab 2;
step 3), arranging longitudinal prestress steel strands 6 at the lower part, connecting anchors 9 at one ends of the prestress steel strands 6 at two sides, connecting upper adjacent prefabricated UHPC boards 11 by penetrating through the floor slab 2 at one end, and connecting upper adjacent prefabricated UHPC boards 11 by penetrating through the floor slab 2 at two ends of the middle prestress steel strand 6;
step 4), arranging a semicircular steering gear 10 at the turning part of the prestress steel strand 6;
step 5) arranging hook bolts 12, wherein the hook bolts 12 penetrate through the prefabricated UHPC plate 11, the floor slab 2 and the multi-ribbed beam 4 to be connected with the lower prestressed steel strand 6, and after the installation is finished, the steel strand 6 is prestressed through the upper bolts;
step 6), arranging transverse distributing ribs and longitudinal distributing ribs at the lower part of the floor slab 2;
step 7) adopting sprayed high-performance concrete material (UHPC) to strengthen the lower part of the multi-ribbed porous brick 5 floor slab 2;
step 8) pouring the wet joint 15 between the upper plates and the elbow bolt holes 16 of the hook head bolts 12 by adopting high-grade concrete.
In the step 2), the thickness of the prefabricated UHPC plate 11 is 30mm, a plurality of elbow bolt holes 16 are reserved in the middle, the distance is consistent with that of the dense rib beams 4 of the floor slab, elbow reinforcing steel bars 13 reserved in the short side direction of the prefabricated UHPC plate 11 are connected with the prestressed steel strands 6, and 100mm is reserved in two directions as a wet joint 15 when the prefabricated UHPC plate 11 is paved.
In the step 6), longitudinal distributing ribs are arranged among the longitudinal prestressed steel strands 6, the spacing is 200mm, and only the distributing ribs are transversely arranged, and the spacing is 200mm.
The thickness of the UHPC reinforcement layer sprayed in step 7) was controlled at 20mm.
In summary, the utility model has the advantages that: aiming at partial ribbed floors in historical buildings, in order to improve bearing capacity and rigidity, the ribbed floors are reinforced, a mode of combining prestressed steel strands, prefabricated UHPC boards, hook head bolts and UHPC sprayed concrete is adopted, the reinforcing structure is good in bonding effect with the original structure, better in cracking resistance and durability, stronger in integrity, capable of effectively improving the bearing capacity and rigidity of the ribbed floors, almost unchanged in floor clear height after reinforcing construction is finished, and free of larger influence on building space. The utility model has the advantages of strong pertinence, small influence on the original building structure, good reinforcement effect, fast progress, low engineering cost and the like.
The foregoing is merely illustrative of the preferred embodiments of the present utility model and is not intended to limit the embodiments and scope of the present utility model, and it should be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations of the present utility model, and are intended to be included in the scope of the present utility model.
Claims (10)
1. A dense rib floor composite reinforcement structure based on prefabricated plate and steel strand wires, its characterized in that includes:
a plurality of precast slabs which are installed on the upper surface of the floor slab and are distributed at intervals in the horizontal direction;
the spray layers are arranged on the lower surface of the floor slab and positioned between the outer wall and the original cast-in-situ beam or between the adjacent original cast-in-situ beams;
the position of the spraying layer corresponds to the precast slab up and down;
a plurality of spraying layers are internally provided with steel strands, one end of each steel strand, which is close to the outer wall, passes through the outer wall and is connected with a fixing piece, and the other end of each steel strand passes through the floor slab and is connected with the precast slab;
and a hook bolt is also connected between the precast slab and the steel strand.
2. The composite reinforcement structure of a ribbed floor slab based on prefabricated slabs and steel strands according to claim 1, wherein a plurality of uniformly distributed elbow bolt holes are penetratingly arranged on the surface of the prefabricated slabs, and the positions of the elbow bolt holes correspond to the positions of the ribbed beams among porous bricks in the floor slab range corresponding to the lower parts of the prefabricated slabs.
3. The composite reinforcement structure of the ribbed floor slab based on the precast slabs and the steel strands according to claim 2, wherein one end of the hook bolt is connected with the steel strands, and the other end of the hook bolt passes through the ribbed beam and the elbow bolt hole to be connected with the bolts.
4. The composite reinforcement structure of a ribbed floor slab based on precast slabs and steel strands according to claim 1, wherein reserved steel bar joints are arranged on the surfaces of two adjacent precast slabs, one ends of the steel strands between the outer wall and the original cast-in-situ beams are connected to the reserved steel bar joints of the adjacent precast slabs, and two ends of the steel strands between the adjacent original cast-in-situ beams are respectively connected to the reserved steel bar joints of the corresponding adjacent precast slabs.
5. The composite reinforcement structure of a ribbed floor slab based on prefabricated slabs and steel strands according to claim 4, characterized in that said sprayed layer is provided with a diverter at the corner where said steel strands are connected to the adjacent prefabricated slabs.
6. The composite reinforcement structure of the ribbed floor based on precast slabs and steel strands according to claim 4, wherein the number of the steel strands is identical to the number of the reserved steel bar joints, and a plurality of longitudinal distributing ribs and a plurality of transverse distributing ribs are arranged between the radially adjacent steel strands in the spraying layer.
7. A multi-ribbed floor composite reinforcing structure based on prefabricated panels and steel strands as claimed in claim 1, wherein said fixing members comprise bearing steel plates attached to the outer wall and anchors contacting said bearing steel plates, and said steel strands pass through said bearing steel plates and said anchors and are fixed to said outer wall.
8. The composite reinforcement structure of the ribbed floor slab based on the precast slabs and the steel strands according to claim 2, wherein concrete is filled between the elbow bolt holes and the hook head bolts and between the elbow bolt holes and the hook head bolts.
9. The composite reinforcement structure of the ribbed floor slab based on the precast slabs and the steel strands, according to claim 1, is characterized in that wet joints are reserved among a plurality of precast slabs distributed longitudinally and laterally at intervals, and concrete is filled in the wet joints.
10. The composite reinforcement structure of a ribbed floor slab based on prefabricated slabs and steel strands according to claim 1, characterized in that said prefabricated slabs are ultra-high performance concrete prefabricated slabs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322114713.8U CN220580619U (en) | 2023-08-08 | 2023-08-08 | Multi-ribbed floor slab composite reinforcing structure based on precast slab and steel strand wires |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322114713.8U CN220580619U (en) | 2023-08-08 | 2023-08-08 | Multi-ribbed floor slab composite reinforcing structure based on precast slab and steel strand wires |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220580619U true CN220580619U (en) | 2024-03-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322114713.8U Active CN220580619U (en) | 2023-08-08 | 2023-08-08 | Multi-ribbed floor slab composite reinforcing structure based on precast slab and steel strand wires |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220580619U (en) |
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2023
- 2023-08-08 CN CN202322114713.8U patent/CN220580619U/en active Active
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