CN111021615A - Novel laminated plate and manufacturing method thereof - Google Patents
Novel laminated plate and manufacturing method thereof Download PDFInfo
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- CN111021615A CN111021615A CN201911350890.8A CN201911350890A CN111021615A CN 111021615 A CN111021615 A CN 111021615A CN 201911350890 A CN201911350890 A CN 201911350890A CN 111021615 A CN111021615 A CN 111021615A
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- reinforced concrete
- slab
- truss
- concrete slab
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- 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
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- 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
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Abstract
The invention relates to a novel composite slab, which comprises a reinforced concrete slab; grooves are formed in two end portions of the reinforced concrete slab, a plurality of through holes are formed in the reinforced concrete slab, two ends of each through hole are located in the grooves, a plurality of positioning longitudinal ribs which are arranged at intervals are inserted into the through holes, the positioning longitudinal ribs extend to the outer side of the reinforced concrete slab from the grooves, at least two groups of truss reinforcing steel bars are vertically distributed on the reinforced concrete precast slab, and the bottoms of the truss reinforcing steel bars are pre-buried in the reinforced concrete slab; the invention has simple structure, and the truss steel bars are assembled on the reinforced concrete precast slabs, so that the reinforced concrete precast slabs are reasonable in stress, have higher longitudinal rigidity and bearing capacity, and are not easy to deform in the transportation and hoisting processes.
Description
Technical Field
The invention belongs to the technical field of buildings, and particularly relates to a novel laminated slab and a manufacturing method thereof.
Background
At present, in traditional structural engineering, particularly residential engineering, a floor slab is mostly of a common cast-in-place reinforced concrete structure, a formwork and a supporting system need to be erected firstly during construction, reinforcing steel bars are bound, equipment pipelines in the slab are laid, concrete is poured, and the formwork and the supporting system are dismantled after the strength of the concrete meets design requirements. The field procedures required by the traditional construction technology are complicated and the construction period is long.
The application numbers are: chinese patent CN201220748969.3 discloses a "reinforced concrete prefabricated composite slab with truss ribs", which comprises a bottom plate and longitudinal truss ribs perpendicular to the bottom plate, wherein the truss ribs are provided with light steel trusses or common steel trusses inside. The truss rib comprises an upper chord, a lower chord which is parallel to the upper chord and combined with the bottom plate, a plurality of truss web members connected between the upper chord and the lower chord, and holes formed between the plurality of web members. The truss rib is formed by assembling and combining a pair of Z-shaped lattice section steels, wherein the Z-shaped lattice section steels are provided with two flanges which are parallel to each other and a plurality of section steel web members which are connected between the flanges and arranged at intervals in parallel, and the pair of Z-shaped lattice section steels are combined in a superposition mode. The prefabricated composite slabs are assembled on site, longitudinal upper reinforcing steel bars and transverse upper and lower stressed reinforcing steel bars are arranged, and then concrete is poured.
The laminated slab structure can not realize the bidirectional stress function of the laminated slab, and the design not only increases the steel consumption, but also is easy to crack a floor slab in the use stage and influences the use of users; with the continuous expansion of the basic construction scale, the continuous improvement of the labor cost and the stricter requirement on the environmental protection, the traditional construction technology can not meet the sustainable development requirement of China more and is difficult to adapt to the house industrialization policy of the continuous deepening popularization of China.
In view of the above problems, it is necessary to improve them.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a novel laminated slab which is simple in structure, reasonable in design, light in dead weight, large in longitudinal rigidity, convenient to construct, good in integrity and good in bidirectional stress performance.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows: a novel composite slab comprises a reinforced concrete slab; the reinforced concrete precast slab is characterized in that grooves are formed in two end portions of the reinforced concrete slab, a plurality of through holes are formed in the reinforced concrete slab, two ends of each through hole are located in the grooves, a plurality of positioning longitudinal ribs which are arranged at intervals are inserted into the through holes, the positioning longitudinal ribs extend to the outer side of the reinforced concrete slab from the grooves, at least two groups of truss reinforcing steel bars are vertically distributed on the reinforced concrete precast slab, and the bottoms of the truss reinforcing steel bars are pre-buried in the reinforced concrete slab.
In a preferred embodiment of the present invention, a plurality of transverse non-prestressed tendons spaced apart from each other are installed in the reinforced concrete slab, and a plurality of longitudinal non-prestressed tendons spaced apart from each other are fixed to bottoms of the plurality of transverse non-prestressed tendons, respectively.
As a preferable scheme of the invention, three truss reinforcing steel bars are arranged and are equidistantly distributed on the reinforced concrete precast slab.
In a preferred embodiment of the present invention, the truss reinforcement is fixed in the reinforced concrete slab and is fixedly connected with the transverse non-prestressed reinforcement in the reinforced concrete slab.
In a preferred embodiment of the present invention, the truss reinforcement includes a truss top longitudinal rib, and two sides of the truss top longitudinal rib are respectively fixedly connected to a transverse non-prestressed rib on a corresponding side in the reinforced concrete slab through an obliquely arranged wavy truss triangular rib.
In a preferable scheme of the invention, the length of the groove is 1/3-1/4 of the length of a reinforced concrete slab.
As a preferable mode of the present invention, the end of the positioning longitudinal rib is bent upward.
In a preferred embodiment of the present invention, the other laminated plate is a split laminated plate formed by splicing adjacent side surfaces.
In a preferred embodiment of the present invention, a splicing seam is left between adjacent side surfaces of two laminated boards included in the spliced laminated board, and the width of the splicing seam is about 30mm to about 100 mm.
According to a preferable scheme of the invention, a binding rib is arranged in the splicing seam along the direction of the splicing seam.
A laminated plate and a manufacturing method thereof comprise the following steps:
step 1: pouring a reinforced concrete slab in a component factory, embedding a transverse non-prestressed rib and a longitudinal non-prestressed rib in the reinforced concrete slab in a production process, assembling at least two groups of truss reinforcing steel bars on the reinforced concrete slab, so that the bottoms of the truss reinforcing steel bars are embedded in the reinforced concrete slab in advance, and grooves are formed in two end parts of the reinforced concrete slab;
step 2: extending the positioning longitudinal rib into the through hole, wherein the positioning longitudinal rib extends to the outer side of the reinforced concrete slab from the groove, and the distance of the positioning longitudinal rib extending out of the outer side of the reinforced concrete slab is 60 mm;
and step 3: connecting the supporting cross rods and the supporting vertical rods to form supporting units, and arranging the supporting units at the outer sides of the adjacent reinforced concrete slabs;
and 4, step 4: 3, paving plates on the supporting units, symmetrically performing equal-load prepressing on the supporting units according to the construction load and the distribution form of the construction load, and unloading after the node positions of the supporting units are adjusted and stabilized;
and 5: hoisting the reinforced concrete slabs processed in the step 2 on site to enable the positioning longitudinal ribs in the grooves on the adjacent reinforced concrete slabs to be aligned with each other; slowly and stably dropping to be initially positioned, and adjusting the distance between splicing seams of adjacent reinforced concrete plates, wherein the distance between the adjacent reinforced concrete plates is 30-100 mm;
step 6: a plurality of reinforcing steel bars are equidistantly placed in the groove, and the reinforcing steel bars and the positioning longitudinal bars are alternately arranged;
and 7: binding bars are connected between adjacent reinforced concrete slabs; the binding ribs are bound and fixed by a plurality of transverse plate gluten and longitudinal plate gluten;
and 8: concrete is cast in the grooves and the splicing seams in situ to form a laminated slab;
and step 9: and after the strength of the laminated slab meets the design requirement, the supporting units are symmetrically removed.
The invention has the beneficial effects that:
1. the invention has simple structure, the truss steel bars are assembled on the reinforced concrete precast slab, so that the reinforced concrete precast slab has reasonable stress and larger longitudinal rigidity and bearing capacity, and is not easy to deform in the transportation and hoisting processes;
2. the reinforcing steel bar is reasonable in configuration, and good anti-cracking performance and good bidirectional stress performance of the laminated slab can be guaranteed after concrete is poured in situ;
3. the invention is combined with the bearing wall based on prefabricated parts, can greatly improve the industrialization level and the construction speed of construction engineering, reduces on-site template engineering and reinforcing steel bar engineering, improves the engineering quality, and accords with the national residential industrialization policy.
4. The grooves are arranged on the reinforced concrete precast slabs, and the force transmission of the bidirectional slabs is realized by the internal force transmission between the reinforcing steel bars and the positioning longitudinal bars between the adjacent grooves, so that the performance of the reinforced concrete precast slabs is consistent with that of the traditional cast-in-situ bidirectional stressed floor slab; meanwhile, the rigidity and the bearing capacity of the node structure are improved by adopting binding ribs.
Drawings
FIG. 1 is a schematic structural diagram of a laminated plate according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view A-A of an embodiment of the present invention;
FIG. 3 is a cross-sectional view B-B of an embodiment of the present invention;
FIG. 4 is a plate reinforcement view of a composite panel according to an embodiment of the present invention;
FIG. 5 is a diagram illustrating a splicing structure of a laminated slab according to an embodiment of the present invention;
FIG. 6 is a cross-sectional view C-C of an embodiment of the present invention;
FIG. 7 is a D-D cross-sectional view of an embodiment of the present invention;
reference numbers in the figures: reinforced concrete slab 1, truss reinforcing bar 2, location vertical muscle 3, reinforcing bar 5, horizontal board gluten 6, vertical board gluten 7, concrete 8, ligature muscle 9, recess 11, perforating hole 15, horizontal non-prestressed reinforcement 12, vertical non-prestressed reinforcement 13, splice joint 14, perforating hole 15, the vertical muscle 20 in truss top, truss triangle muscle 21.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example (b):
as shown in fig. 1 to 4, the present embodiment provides a novel composite slab, which includes a reinforced concrete slab 1; grooves 11 are formed in two end portions of the reinforced concrete slab 1, a plurality of through holes 15 are formed in the reinforced concrete slab 1, two ends of each through hole 15 are located in the grooves 11, a plurality of positioning longitudinal ribs 3 which are arranged at intervals are inserted into the through holes 15, the positioning longitudinal ribs 3 extend from the grooves 11 to the outer side of the reinforced concrete slab 1, at least two groups of truss reinforcements 2 are vertically distributed on the reinforced concrete precast slab 1, and the bottoms of the truss reinforcements 2 are embedded in the reinforced concrete slab 1; the end part of the positioning longitudinal bar 3 is bent upwards, and the upper end part of the positioning longitudinal bar is level with the reinforcing steel bar 5 in the horizontal direction; the reinforced concrete precast slab is provided with the grooves, and the adjacent grooves transmit the internal force between the reinforcing steel bars and the positioning longitudinal bars, so that the force transmission of the bidirectional slab is realized, and the performance of the bidirectional slab is consistent with that of the traditional cast-in-place bidirectional stressed floor slab; meanwhile, the rigidity and the bearing capacity of the node structure are improved by adopting binding ribs.
A plurality of transverse non-prestressed tendons 12 which are arranged at intervals are arranged in the reinforced concrete slab 1, and a plurality of longitudinal non-prestressed tendons 13 which are arranged at intervals are respectively fixed at the bottoms of the transverse non-prestressed tendons 12; the transverse non-tendons 12 and/or the longitudinal non-tendons 13 may or may not extend beyond the end or side of the reinforced concrete slab 1, according to the engineering requirements.
Three truss reinforcing steel bars 2 are arranged on the reinforced concrete precast slab 1 at equal intervals; the truss steel bar 2 is fixedly arranged in the reinforced concrete slab 1 and is fixedly connected with a transverse non-prestressed tendon 12 in the reinforced concrete slab 1; the truss steel bar 2 comprises a truss top longitudinal bar 20, and two sides of the truss top longitudinal bar 20 are respectively fixedly connected with a transverse non-prestressed bar 12 on the corresponding side in the reinforced concrete slab 1 through an obliquely arranged wavy truss triangular bar 21.
The longitudinal ribs 20 and the triangular ribs 21 on the top of the truss are metal strips in an integrated structure, the strength, the position stability and the reliability in the construction process of the longitudinal ribs 20 and the triangular ribs 21 on the top of the truss can be realized through the integrated structure, and the separation and the looseness of the longitudinal ribs 21 or the longitudinal ribs 20 on the top of the truss in the transportation and construction processes are avoided.
The invention has simple structure, and the truss steel bars are assembled on the reinforced concrete precast slabs, so that the reinforced concrete precast slabs are reasonable in stress, have higher longitudinal rigidity and bearing capacity, and are not easy to deform in the transportation and hoisting processes.
The length of the groove 11 is 1/3-1/4 of the length of the reinforced concrete slab 1; in the invention, the length of the reinforced concrete slab 1 is 3000mm, and the length of the groove 11 is 800 mm; the reinforcing steel bar is reasonable in configuration, and good anti-cracking performance and bidirectional stress performance of the laminated slab can be guaranteed after concrete is poured in situ.
As shown in fig. 5-7, splicing the laminated plates, splicing two or more laminated plates at adjacent sides, reserving splicing seams 14 of 30-100 mm between the plates, and arranging binding ribs 9 in the gaps along the direction of the seams; for casting concrete 8 through a hang die to enhance the integrity of the spliced composite slab.
A laminated plate and a manufacturing method thereof comprise the following steps:
step 1: pouring a reinforced concrete slab 1 in a component factory, embedding a transverse non-prestressed tendon 12 and a longitudinal non-prestressed tendon 13 in the reinforced concrete slab 1 in a production process, wherein the transverse non-prestressed tendon 12 and the longitudinal non-prestressed tendon 13 are tied into a rectangular lattice frame according to the requirement of the distance, in the tying process, firstly, sizing is carried out through a small tying wire, then, the lattice frame is turned for 90 degrees, and is tied and positioned, and metal strips are sequentially wound on the transverse non-prestressed tendon 12; at least two groups of truss reinforcing steel bars 2 are assembled on the reinforced concrete slab 1, so that the bottoms of the truss reinforcing steel bars 2 are embedded in the reinforced concrete slab 1, and grooves 11 are formed in two end parts of the reinforced concrete slab 1.
Wherein, the bottom plate concrete strength of the reinforced concrete slab 1 can be constructed and installed after reaching 100 percent of the design strength; before the bottom plate is in place, a temporary support consisting of vertical supports and cross beams is arranged at a position 500mm away from the support saddle; the support spacing is not more than 1.8 m.
Step 2: and the positioning longitudinal rib 3 extends into the through hole 15, the positioning longitudinal rib 3 extends to the outer side of the reinforced concrete slab 1 from the groove 11, and the distance from the positioning longitudinal rib 3 extending out of the outer side of the reinforced concrete slab 1 is 60 mm.
And step 3: connecting the supporting cross rods and the supporting vertical rods to form supporting units, and arranging the supporting units at the outer sides of the adjacent reinforced concrete slabs 1;
and 4, step 4: 3, paving plates on the supporting units, symmetrically performing equal-load prepressing on the supporting units according to the construction load and the distribution form of the construction load, and unloading after the node positions of the supporting units are adjusted and stabilized;
specifically, the uniformly distributed load in construction should not be more than 1.5 kN/square meter, the uniformly distributed load in the range of the single plate should not be more than 1.0 kN/square meter, otherwise, reinforcing measures should be taken. (the construction uniform load does not contain the dead weight of the cast-in-place concrete of the laminated slab).
And 5: hoisting the reinforced concrete slabs 1 processed in the step 2 on site to enable the positioning longitudinal ribs 3 in the grooves 11 on the adjacent reinforced concrete slabs 1 to be aligned with each other; slowly and stably dropping to be initially positioned, and adjusting the distance between the splicing seams 14 of the adjacent reinforced concrete plates 1, wherein the distance between the adjacent reinforced concrete plates 1 is 30-100 mm;
step 6: a plurality of reinforcing steel bars 5 are equidistantly placed in the groove 11, and the reinforcing steel bars 5 and the positioning longitudinal bars 3 are alternately arranged;
and 7: binding bars 9 are connected between the adjacent reinforced concrete slabs 1; the binding ribs 9 are bound and fixed by a plurality of transverse plate gluten 6 and longitudinal plate gluten 7;
and 8: concrete 8 is cast in the grooves 11 and the splicing seams 14 in situ to form a laminated slab;
and step 9: and after the strength of the laminated slab meets the design requirement, the supporting units are symmetrically removed.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention; thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Although the reference numerals in the figures are used more here: reinforced concrete slab 1, truss reinforcing steel bar 2, positioning longitudinal bar 3, reinforcing steel bar 5, transverse bar gluten 6, longitudinal bar gluten 7, concrete 8, binding bar 9, groove 11, through hole 15, transverse non-prestressed bar 12, longitudinal non-prestressed bar 13, splicing seam 14, through hole 15, truss top longitudinal bar 20, truss triangular bar 21 and other terms, but the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (10)
1. A novel laminated slab is characterized in that: comprising a reinforced concrete slab (1); the reinforced concrete slab is characterized in that grooves (11) are formed in two end portions of the reinforced concrete slab (1), a plurality of through holes (15) are formed in the reinforced concrete slab (1), two ends of each through hole (15) are located in the grooves (11), a plurality of positioning longitudinal ribs (3) are arranged in the through holes (15) at intervals in an inserted mode, the positioning longitudinal ribs (3) extend to the outer side of the reinforced concrete slab (1) from the grooves (11), at least two groups of truss reinforcing steel bars (2) are vertically distributed on the reinforced concrete precast slab (1), and the bottoms of the truss reinforcing steel bars (2) are pre-embedded in the reinforced concrete slab (1).
2. A novel laminated slab as claimed in claim 1, wherein: install many horizontal non-prestressed tendons (12) that set up each other at an interval in reinforced concrete board (1) many the bottom of horizontal non-prestressed tendon (12) be fixed with many vertical non-prestressed tendons (13) that set up each other at an interval respectively.
3. A novel laminated slab as claimed in claim 1, wherein: the number of the truss reinforcing steel bars (2) is three, and the truss reinforcing steel bars are equidistantly distributed on the reinforced concrete precast slab (1).
4. A novel laminated slab as claimed in claim 3, wherein: the truss steel bars (2) are fixedly arranged in the reinforced concrete slab (1) and fixedly connected with the transverse non-prestressed ribs (12) in the reinforced concrete slab (1).
5. A novel laminated slab as claimed in claim 4, wherein: the truss steel bar (2) comprises a truss top longitudinal bar (20), and two sides of the truss top longitudinal bar (20) are respectively fixedly connected with a transverse non-prestressed bar (12) on the corresponding side in the reinforced concrete slab (1) through an obliquely arranged wavy truss triangular bar (21).
6. A novel laminated slab as claimed in claim 1, wherein: the length of the groove (11) is 1/3-1/4 of the length of the reinforced concrete slab (1).
7. A novel laminated slab as claimed in claim 1, wherein: the end part of the positioning longitudinal rib (3) is bent upwards.
8. A novel laminated slab as claimed in claims 1 to 7, wherein: the other laminated slab of the laminated slab is spliced by adjacent side faces to form a spliced laminated slab.
9. A novel laminated panel according to claim 8, wherein: a splicing seam (14) is reserved between the adjacent side surfaces of two laminated plates included in the spliced laminated plate, and the width of the splicing seam (14) is about 30mm to about 100 mm; and binding ribs (9) along the direction of the splicing seams (14) are arranged in the splicing seams (14).
10. A laminated board and a method for manufacturing the same as claimed in any one of claims 1 to 9, comprising the steps of:
step 1: pouring a reinforced concrete slab (1) in a component factory, embedding a transverse non-prestressed rib (12) and a longitudinal non-prestressed rib (13) in the reinforced concrete slab (1) in advance in the production process, assembling at least two groups of truss reinforcing steel bars (2) on the reinforced concrete slab (1) so that the bottoms of the truss reinforcing steel bars (2) are embedded in the reinforced concrete slab (1) in advance, and arranging grooves (11) at two end parts of the reinforced concrete slab (1);
step 2: extending the positioning longitudinal rib (3) into the through hole (15), wherein the positioning longitudinal rib (3) extends to the outer side of the reinforced concrete slab (1) from the groove (11), and the distance of the positioning longitudinal rib (3) extending out of the outer side of the reinforced concrete slab (1) is 60 mm;
and step 3: connecting the supporting cross rods and the supporting vertical rods to form supporting units, and arranging the supporting units at the outer sides of the adjacent reinforced concrete slabs (1);
and 4, step 4: 3, paving plates on the supporting units, symmetrically performing equal-load prepressing on the supporting units according to the construction load and the distribution form of the construction load, and unloading after the node positions of the supporting units are adjusted and stabilized;
and 5: hoisting the reinforced concrete slabs (1) processed in the step 2 on site, and aligning the positioning longitudinal ribs (3) in the grooves (11) on the adjacent reinforced concrete slabs (1) with each other; slowly and stably dropping to be initially positioned, and adjusting the distance between splicing seams (14) of adjacent reinforced concrete plates (1), wherein the distance between the adjacent reinforced concrete plates (1) is 30-100 mm;
step 6: a plurality of reinforcing steel bars (5) are equidistantly placed in the groove (11), and the reinforcing steel bars (5) and the positioning longitudinal bars (3) are alternately arranged;
and 7: binding bars (9) are connected between adjacent reinforced concrete slabs (1); the binding ribs (9) are bound and fixed by a plurality of transverse plate gluten (6) and longitudinal plate gluten (7);
and 8: concrete (8) is cast in situ in the groove (11) and the splicing seam (14) to form a laminated slab;
and step 9: and after the strength of the laminated slab meets the design requirement, the supporting units are symmetrically removed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911350890.8A CN111021615A (en) | 2019-12-24 | 2019-12-24 | Novel laminated plate and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911350890.8A CN111021615A (en) | 2019-12-24 | 2019-12-24 | Novel laminated plate and manufacturing method thereof |
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| CN111021615A true CN111021615A (en) | 2020-04-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112523411A (en) * | 2020-12-22 | 2021-03-19 | 福州建工（集团）总公司 | Assembled composite floor slab and installation method thereof |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112523411A (en) * | 2020-12-22 | 2021-03-19 | 福州建工（集团）总公司 | Assembled composite floor slab and installation method thereof |
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