CN111335531A - Building block variable cross-section unidirectional prefabricated hollow slab superposed floor - Google Patents
Building block variable cross-section unidirectional prefabricated hollow slab superposed floor Download PDFInfo
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- CN111335531A CN111335531A CN201811558695.XA CN201811558695A CN111335531A CN 111335531 A CN111335531 A CN 111335531A CN 201811558695 A CN201811558695 A CN 201811558695A CN 111335531 A CN111335531 A CN 111335531A
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- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
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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
- E04B5/32—Floor structures wholly cast in situ with or without form units or reinforcements
- E04B5/36—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor
- E04B5/38—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor with slab-shaped form units acting simultaneously as reinforcement; Form slabs with reinforcements extending laterally outside the element
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
- E04C2/06—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres reinforced
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
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Abstract
The invention provides a variable cross-section unidirectional prefabricated hollow slab laminated floor system for a block building, which is characterized in that a laminated layer is fixedly connected between two adjacent variable cross-section unidirectional prefabricated hollow slabs in the length direction, a midspan region and a support region of each variable cross-section unidirectional prefabricated hollow slab are wrapped, the support regions are equidistantly positioned at two sides of the midspan region, the thickness of the midspan region is greater than that of the support regions, laminated layers are cast on the opposite support regions of the two adjacent variable cross-section unidirectional prefabricated hollow slabs, and the upper surfaces of the laminated layers are flush with the upper surfaces of the midspan regions. The invention solves the problems that the laminated floor system in the prior art has large using amount of cast-in-place concrete laminated layers, needs to be provided with a support during construction, is connected with a wall and is not reasonable enough for connecting the wall and the plate.
Description
Technical Field
The invention relates to a variable cross-section unidirectional prefabricated hollow slab superposed floor system of a block building, belonging to the technical field of superposed floor systems.
Background
The floor system can be divided into an integral type, an assembled type and an assembled integral type according to construction modes. The assembled integral floor has the advantages of large integral rigidity, good earthquake resistance, simple and convenient construction, shortened construction period and the like. The concrete laminated slab is an assembled integral floor formed by pouring a layer of cast-in-place concrete on a prefabricated slab, and can be divided into a primary stressed laminated slab and a secondary stressed laminated slab according to stress conditions. In the construction stage, the precast slabs are used as templates of the cast-in-place layer concrete, supports are not arranged below the precast slabs, the precast slabs bear the dead weight, the weight of the post-cast layer concrete and the load during construction, after the upper layer of the cast-in-place concrete reaches the design strength, the superposed section formed by the precast parts and the cast-in-place parts bears the service load, and the secondary stress superposed slab is formed.
The assembled reinforced block masonry building is an assembled building with vertical bearing adopting an assembled reinforced block masonry shear wall structure. The assembled reinforced block masonry shear wall structure is a reinforced block masonry shear wall bearing structure formed by pouring concrete in a wall hole and a connecting column after vertical steel bars and horizontal steel bars are reliably connected by hoisting and installing prefabricated block masonry components. The prefabrication of the building block masonry wall realizes the full-time operation of masonry workers, has no idling phenomenon, provides arrangement on working procedures for the mechanization of masonry operation, and is an important measure for reducing the labor consumption, improving the efficiency and ensuring the quality. The assembly type reinforced block masonry building is an important component of an assembly type building system, and in view of the engineering application advantages of capital saving, labor saving, manpower saving, energy saving, land saving, water saving, material saving and environmental protection, the assembly type reinforced block masonry building needs to be promoted to be healthily and rapidly developed.
The calculation method for developing the background and the assembly rate of the fabricated building shows that the method saves the cast-in-place concrete quantity of the laminated layer, avoids the plate bottom support in the construction stage, improves the construction efficiency and ensures the engineering quality, and is the development direction of the country for laminated floor systems. Although various laminated slabs mature in application appear in the building engineering, the problems that the consumption of cast-in-place concrete laminated layers is large, a support needs to be arranged during construction, the connection between the slabs and the walls is not reasonable enough, and the like exist, and therefore, the invention needs to invent the laminated floor which has excellent performance, is suitable for the assembled reinforced block masonry building and can continuously bear the force along the slab span direction.
Disclosure of Invention
The invention solves the problems of large consumption of cast-in-place concrete superposed layers, support arrangement during construction, plate-to-wall connection and unreasonable wall-to-wall connection in the laminated floor system in the prior art, and provides the laminated floor system of the blocky building variable cross-section unidirectional prefabricated hollow plate, which can avoid the plate bottom support arrangement in the construction stage of the laminated floor system, realize continuous stress of the floor slab after the arrangement of the negative bending moment ribs in the laminated layers and the pouring of the laminated layer concrete, ensure the consumption of the cast-in-place concrete and improve the construction efficiency.
In order to achieve the purpose, the invention provides a building block variable cross-section unidirectional prefabricated hollow slab superposed floor system which comprises n variable cross-section unidirectional prefabricated hollow slabs and m superposed layers, wherein m and n are natural numbers, and the superposed layers are fixedly connected between every two adjacent variable cross-section unidirectional prefabricated hollow slabs in the length direction; the one-way hollow core slab package piece of variable cross section is striden regional and support region, the regional equidistance of support is located the both sides of striding the middle region, the thickness of striding the middle region is greater than the regional thickness of support, adjacent two pour the superimposed sheet on the relative support region of the one-way hollow core slab of variable cross section, the upper surface of superimposed sheet flushes with the upper surface of striding the middle region, the vertical both ends in upper portion of striding the middle region are provided with a plurality of first hogging moment muscle, first hogging moment muscle stretches into in the superimposed sheet, be provided with a plurality of second hogging moment muscle in the superimposed sheet.
Preferably, the midspan region further includes a plurality of longitudinal cavities, the plurality of longitudinal cavities longitudinally penetrate in parallel in the midspan region, and the longitudinal cavities are disposed below the first hogging moment rib.
Preferably, the length of the part of the first negative bending moment rib, which extends out of the midspan region, is smaller than the width of the support region.
Preferably, the second hogging moment rib and the first hogging moment rib are connected in a lap joint mode or other connection modes
Preferably, a plurality of positive bending moment ribs are longitudinally arranged at the bottom of the variable cross-section unidirectional hollow precast slab in parallel, and the positive bending moment ribs penetrate through the midspan area and the support area.
Preferably, a plurality of protrusions shaped like Chinese character 'ji' are uniformly distributed at the end part of the support area.
Preferably, the thickness of the support area is more than or equal to 50mm, and the thickness of the midspan area is more than or equal to 110 mm.
Preferably, the width of the seating area is 400mm to 600 mm.
Preferably, the mark width and the mark length of the variable cross-section unidirectional hollow precast slab are multiples of 200mm, and the mark width is 800mm, 1000mm or 1200 mm.
The working principle of the variable cross-section unidirectional prefabricated hollow slab superposed floor system of the block building is as follows:
a building variable cross-section unidirectional precast hollow slab superposed floor system relates to a building component, and the plate thickness of the support areas at two ends is smaller than that of the midspan area along the length direction of the precast hollow slab to form a variable cross-section unidirectional precast hollow slab; and then the variable cross-section unidirectional precast hollow slab is taken as a bottom plate, cast-in-place concrete superposed layers are arranged in the support areas at the two ends, and a hogging moment rib is arranged in the superposed layers, the hogging moment rib is connected with the reserved steel bars of the precast hollow slab on one hand, and reliable anchoring at the support position is realized on the other hand, and continuous stress of the variable cross-section unidirectional precast hollow slab superposed floor system can be realized through the reinforcement arrangement of the cast-in-place superposed layers. The problems that the prefabricated slabs are not coordinated in stress during construction and use, the wall body is weak in connection with the prefabricated slabs, and the quality of the wall body is difficult to guarantee through horizontal member connection are solved. The variable cross-section unidirectional prefabricated hollow slab superposed floor system of the block building has the advantages of no support during construction, material saving, lightening of self weight of prefabricated components, increase of sound insulation function of slabs and the like, meets the requirements of green, energy saving and environmental protection, and is suitable for superposed floor systems and superposed roof systems of house buildings.
The invention discloses a building block variable cross-section unidirectional prefabricated hollow slab superposed floor system, which has the beneficial effects that:
1. the laminated floor system formed by using the variable cross-section unidirectional prefabricated hollow slab as the bottom plate of the variable cross-section unidirectional prefabricated hollow slab of the block building has the characteristics of two-stage stress: the bottom of the prefabricated hollow plate is not supported in the construction stage, so that the construction efficiency can be improved, and the engineering cost can be reduced.
2. The span bending moment of the variable cross-section unidirectional precast hollow slab laminated floor slab of the block building is larger than the bending moment of the support, so that the phenomenon that the quantity of traditional negative bending moment ribs is larger than that of positive bending moment ribs is changed, and convenience is provided for construction of negative bending moment reinforcing steel bars in the laminated floor.
3. The post-cast laminated layer of the variable cross-section unidirectional prefabricated hollow slab laminated floor system of the block building only appears in the support area of the prefabricated hollow slab, the top surface of the laminated floor system is flat in the midspan area, and the flatness of the laminated floor system determines the feasibility of accurately controlling the flatness of the laminated floor system.
4. The block building variable cross-section unidirectional precast hollow slab superposed floor system disclosed by the invention connects the hogging moment ribs of the two variable cross-section unidirectional precast slabs through the rear connecting steel bars or a mechanical connecting mode arranged in the support area, so that the continuous stress of the superposed slabs in the using stage is realized.
5. The building variable cross-section unidirectional precast hollow slab laminated floor slab solves the problems that the stress of precast slabs is not coordinated during construction and use, the connection between a wall body and a precast horizontal component is weak, and the quality of the wall body is difficult to ensure through the connection of the horizontal component.
6. The longitudinal hole is designed on the building cover of the variable cross-section unidirectional precast hollow slab of the block building, so that the concrete amount is saved due to the hollow cross section, the dead weight of the precast slab is reduced, the positive bending moment during construction is reduced, the deformation capability of the slab is improved, and the sound insulation function of the slab is enhanced.
7. The assembly of engineering application is realized through modulization of the variable-section unidirectional prefabricated hollow slab, the production efficiency is improved due to the reduction of the slab type, the engineering assembly efficiency is improved due to the reduction of customization, and the purpose of reducing the cost is finally achieved.
8. The variable cross-section unidirectional prefabricated hollow slab superposed floor system of the block building disclosed by the invention applies prestress to the positive bending moment rib of the variable cross-section unidirectional prefabricated hollow slab superposed floor system, so that the steel consumption can be reduced, and the problem that the strength of a floor slab is easy to reduce due to inverted arch and cold-drawn low-carbon steel wires in case of fire at high temperature is solved.
9. The variable cross-section form of the support area of the variable cross-section unidirectional prefabricated hollow slab laminated floor system of the block building changes the process arrangement of firstly pouring laminated concrete and then hoisting an upper wall body, and provides possibility for non-intermittent construction operation of the block building.
10. The building block variable cross-section unidirectional prefabricated hollow slab laminated floor system disclosed by the invention accords with the concepts of green, energy saving and environmental protection.
Drawings
FIG. 1 is a schematic structural view of a variable cross-section unidirectional prefabricated hollow slab laminated floor of the block building.
FIG. 2 is a schematic structural view of a unidirectional precast hollow slab of a variable cross-section unidirectional precast hollow slab superposed floor system of the block building of the invention.
FIG. 3 is a side view of a unidirectional precast hollow slab of a variable cross-section unidirectional precast hollow slab overlap floor system of the block building of the present invention.
FIG. 4 is a layout view of hogging moment ribs at the support positions of the building variable cross-section unidirectional precast hollow slab laminated floor system of the invention.
In the figure: 1-variable cross-section unidirectional prefabricated hollow slab; 2-a first hogging moment bar; 3-positive bending moment rib; 4-longitudinal holes; 5-mid-span region; 6-a pedestal area; 7-a lamination layer; 8-a second hogging moment bar; 9-walls or beams.
Detailed Description
The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings:
the first embodiment is as follows: the present embodiment is explained with reference to fig. 1 to 4. The building block variable cross-section unidirectional prefabricated hollow slab superposed floor system comprises n variable cross-section unidirectional prefabricated hollow slabs 1 and m superposed layers 7, wherein m and n are natural numbers, and the superposed layers 7 are fixedly connected between two adjacent variable cross-section unidirectional prefabricated hollow slabs 1 in the length direction; the one-way hollow core slab of variably taking turns 1 package piece stride well region 5 and support region 6, the regional 6 equidistance of support is located the both sides of striding well region 5, the thickness of striding well region 5 is greater than the thickness of the regional 6 of support, adjacent two pour superimposed layer 7 on the relative support region 6 of the one-way hollow core slab of variably taking turns 1, the upper surface of superimposed layer 7 flushes with the upper surface of striding well region 5, the vertical both ends in upper portion of striding well region 5 are provided with a plurality of first hogging moment muscle 2, first hogging moment muscle 2 stretches out and strides well region 5 and stretch into in superimposed layer 7, be provided with a plurality of second hogging moment muscle 8 in the superimposed layer 7.
The variable cross-section unidirectional prefabricated hollow slab 1 is used as a prefabricated bottom plate, the thickness of the midspan region 5 is greater than that of the support region 6, a variable cross-section structure is formed, and compared with the variable cross-section unidirectional prefabricated bottom plate, the non-supported prefabricated bottom plate is usually thicker in the construction stage and larger in self weight; and the single-section prefabricated bottom plate with small self weight needs to be provided with a support in the construction stage. Therefore, the variable cross-section form of the prefabricated bottom plate gives consideration to two aims of construction free bearing and reduction of the self weight of the bottom plate; meanwhile, the flatness of the roof of the midspan area ensures the precision of the flatness control of the floor, and the local superposition of the support area 6 can realize the continuous stress of the laminated slab in the use stage.
The variable cross-section unidirectional hollow precast slab laminated floor system takes the whole variable cross-section unidirectional hollow precast slab 1 as a bottom plate, concrete is poured in support areas 6 at two ends of the variable cross-section unidirectional hollow precast slab 1 to form a local laminated layer 7, cast-in-place concrete is not needed to be poured in a midspan area 5 in the middle, namely, a precast slab top plate of the midspan area 5 is taken as the top surface of the floor. And a wall or beam 9 is arranged right below the junction of the superposed layer 7 and the variable cross-section unidirectional hollow precast slab 1.
The second negative moment rib 8 and the first negative moment rib 2 are connected in a lap joint mode or other connection modes, the effect of effective connection is achieved, bearing is improved beneficially, the second negative moment rib 8 is laid before the laminated layer 7 is poured, operation is simple and convenient, and construction is easy.
The midspan region 5 further comprises a plurality of longitudinal holes 4, the plurality of longitudinal holes 4 longitudinally penetrate through the midspan region 5 in parallel, and the longitudinal holes 4 are arranged below the first hogging moment rib 2.
The thickness of the mid-span area 5 of the prefabricated bottom plate is thicker, so that the longitudinal holes 4 with certain shapes and certain intervals are only arranged in the area, the consumption of concrete is saved, the self weight of the prefabricated plate is reduced, the positive bending moment during construction is reduced, the deformation capability of the plate is improved, and the sound insulation function of the plate is enhanced.
The length of the part of the first hogging moment rib 2 extending out of the span middle area 5 is less than the width of the support area 6.
When the variable cross-section unidirectional hollow slab 1 is produced in a prefabricating way, one part of the first hogging moment rib 2 is embedded in the slab, the other part of the first hogging moment rib is suspended out, and the length of the suspended part meets the requirement of connecting the steel bars and cannot be larger than that of the support area 6. The overhanging part of the first hogging moment rib 2 is connected with the second hogging moment rib arranged in the laminated layer 7 in a lap joint or mechanical connection mode so as to realize continuous stress of the laminated slab.
For the hogging moment bar of the side support, the bar arrangement length from the wall side should be greater than 1/4 of the calculated span of the plate, and accordingly the length embedded in the plate is determined, and the bar arrangement should meet the construction requirements. For the hogging moment rib of the middle support, the rib arrangement quantity is determined according to the designed hogging moment value generated by the laminated layer in the middle support at the stage after the laminated layer concrete reaches the designed and specified strength value, the hogging moment is generated by two loads, one part is dead weight of a surface layer, a suspended ceiling and the like, the other part is variable load, and the variable load can generate larger hogging moment at the construction live load stage and the use stage; the reinforcement distribution length is determined according to a reinforcement material diagram drawn by the span and load characteristics of the laminated floor system.
The bottom of the variable cross-section unidirectional precast hollow slab 1 is longitudinally and parallelly provided with a plurality of positive bending moment ribs 3, and the positive bending moment ribs 3 penetrate through a midspan area 5 and a support area 6.
The end part of the support area 6 is uniformly distributed with a plurality of 'n' -shaped bulges, namely the end part is provided with tooth-shaped bulges, and the stability degree of the wall 9 for supporting the bearing is consistent with the modulus of the building blocks in the wall 9.
The thickness of the support area 6 is more than or equal to 50mm, and the thickness of the midspan area 5 is more than or equal to 110 mm.
According to the bearing capacity checking calculation and the structural requirement of the variable cross-section unidirectional precast slab and the laminated floor, the thickness of a support area 6 of the variable cross-section unidirectional precast hollow slab is generally not less than 50mm, the thickness of a post-cast concrete laminated layer 7 is not less than 60mm, and the thickness and the reinforcement design of the variable cross-section unidirectional precast hollow slab laminated floor meet the two-stage stress requirement of the non-support laminated slab.
The width of the support area is 400 mm-600 mm, and the support area is mainly used for meeting the requirements of connection and non-intermittent construction operation of the first hogging moment rib 2 in the area.
The mark width and the mark length of the variable cross-section unidirectional hollow precast slab 1 are multiples of 200mm, and the mark width is 800mm, 1000mm or 1200 mm.
The length, width and height of a main specification of the building block are 390mm, 190mm and 190mm respectively, in order to be matched with the size of the building block, the mark width and mark length of the variable cross-section unidirectional prefabricated hollow slab 1 are required to be multiples of 0.2m, the specific specification is determined according to the requirement of engineering application flexibility, the mark width can adopt 0.8m, 1.0m or 1.2m, various room sizes can be met by splicing the plurality of variable cross-section unidirectional prefabricated hollow slabs 1, and the variable cross-section unidirectional prefabricated hollow slab superposed floor system which meets the requirement of building construction engineering and can be flexibly combined in plane size can be formed by splicing.
The above-mentioned embodiments further explain the objects, technical solutions and advantages of the present invention in detail. It should be understood that the above-mentioned embodiments are only examples of the present invention, and are not intended to limit the present invention, and that the reasonable combination of the features described in the above-mentioned embodiments can be made, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The laminated floor system is characterized by comprising n variable cross-section unidirectional prefabricated hollow slabs (1) and m laminated layers (7), wherein m and n are natural numbers, and the laminated layers (7) are fixedly connected between two adjacent variable cross-section unidirectional prefabricated hollow slabs (1) in the length direction;
the one-way hollow core slab of becoming cross section (1) package piece is striden regional (5) and support region (6), support region (6) equidistance is located the both sides of striding middle region (5), the thickness of striding middle region (5) is greater than the thickness of support region (6), adjacent two pour on the relative support region (6) of the one-way hollow core slab of becoming cross section (1) and overlap layer (7), the upper surface of overlap layer (7) flushes with the upper surface of striding middle region (5), the vertical both ends in upper portion of striding middle region (5) are provided with a plurality of first negative moment muscle (2), first negative moment muscle (2) stretch out and stride middle region (5) and stretch into in overlap layer (7), be provided with a plurality of second negative moment muscle (8) in overlap layer (7).
2. The building variable cross-section unidirectional hollow slab laminated floor system according to claim 1, wherein the second hogging moment rib (8) is in lap joint with the first hogging moment rib (2).
3. The building variable cross-section unidirectional hollow slab laminated floor system according to claim 1, wherein the midspan region (5) further comprises a plurality of longitudinal holes (4), the plurality of longitudinal holes (4) longitudinally penetrate through the midspan region (5) in parallel, and the longitudinal holes (4) are arranged below the first negative bending moment rib (2).
4. The building variable cross-section unidirectional hollow slab laminated floor system according to claim 1, wherein the length of the part of the first hogging moment rib (2) extending out of the mid-span region (5) is less than the width of the support region (6).
5. The building variable cross-section unidirectional precast hollow slab superposed floor system according to claim 1, wherein a plurality of positive bending moment ribs (3) are longitudinally arranged in parallel at the bottom of the variable cross-section unidirectional precast hollow slab (1), and the positive bending moment ribs (3) penetrate through the midspan region (5) and the support region (6).
6. The building variable cross-section unidirectional hollow slab laminated floor system according to claim 1, wherein a plurality of inverted U-shaped bulges are uniformly distributed at the end of the support area (6).
7. The building variable cross-section unidirectional hollow slab laminated floor system according to claim 1, wherein the thickness of the support area (6) is more than or equal to 50mm, and the thickness of the midspan area (5) is more than or equal to 110 mm.
8. The building variable cross-section unidirectional hollow slab laminated floor system according to claim 1, wherein the width of the support area (6) is 400-600 mm.
9. The building block variable cross-section unidirectional hollow precast slab superposed floor system according to claim 1, wherein the sign width and the sign length of the variable cross-section unidirectional hollow precast slab (1) are multiples of 200mm, and the sign width is 800mm, 1000mm or 1200 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811558695.XA CN111335531A (en) | 2018-12-19 | 2018-12-19 | Building block variable cross-section unidirectional prefabricated hollow slab superposed floor |
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| CN201811558695.XA CN111335531A (en) | 2018-12-19 | 2018-12-19 | Building block variable cross-section unidirectional prefabricated hollow slab superposed floor |
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| CN111335531A true CN111335531A (en) | 2020-06-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112796512A (en) * | 2021-01-28 | 2021-05-14 | 哈尔滨达城绿色建筑股份有限公司 | Construction supporting system and construction method for assembled prestressed hollow slab floor |
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| CN202899380U (en) * | 2012-05-24 | 2013-04-24 | 韩忠民 | Composite floor slab and slab joint formed by the same |
| CN204826619U (en) * | 2015-06-16 | 2015-12-02 | 中国新兴保信建设总公司 | Mould is hung to superimposed sheet instrument formula |
| CN106555453A (en) * | 2017-02-04 | 2017-04-05 | 赤峰市建筑科学研究院有限公司 | A kind of prefabricated overlapped hollow plate of prestressing force and its construction method |
| CN207582764U (en) * | 2017-12-04 | 2018-07-06 | 浙江大学 | A kind of close spelling laminated floor slab connecting joint structure of end fluting |
| CN209353551U (en) * | 2018-12-19 | 2019-09-06 | 哈尔滨达城绿色建筑技术开发股份有限公司 | Glomeration builds the unidirectional precast hollow slab superposed floor of variable cross-section |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112796512A (en) * | 2021-01-28 | 2021-05-14 | 哈尔滨达城绿色建筑股份有限公司 | Construction supporting system and construction method for assembled prestressed hollow slab floor |
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