CN114135037A - Plate truss formwork structure and construction method - Google Patents
Plate truss formwork structure and construction method Download PDFInfo
- Publication number
- CN114135037A CN114135037A CN202111547823.2A CN202111547823A CN114135037A CN 114135037 A CN114135037 A CN 114135037A CN 202111547823 A CN202111547823 A CN 202111547823A CN 114135037 A CN114135037 A CN 114135037A
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- Prior art keywords
- plate
- chord
- sleeve
- formwork structure
- laminated slab
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- 238000009415 formwork Methods 0.000 title claims abstract description 28
- 238000010276 construction Methods 0.000 title claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 230000000903 blocking effect Effects 0.000 claims description 2
- 239000002131 composite material Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 239000004567 concrete Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 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
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
- E04B5/17—Floor structures partly formed in situ
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Abstract
The invention relates to a plate girder formwork structure and a construction method, wherein the plate girder formwork structure comprises an upper chord, a web member and a lower chord; the upper chord plate is simultaneously used as a construction platform for the base layer of the laminated slab and the post-cast layer of the laminated slab; the lower chord is positioned below the upper chord and is connected with the upper chord through a plurality of web members which are detachably connected with the upper chord; according to the invention, the detachable web members and the lower chord members are arranged, when the strength of the laminated slab meets the design requirement, the lower chord members and the web members can be detached, so that the lower chord members and the web members are recycled, and the cost is greatly reduced; in addition, the sleeve can be embedded in the upper node, and the upper chord and the web member are connected through the screw rod with the limiting plate and the sleeve, so that the lower chord and the web member can be conveniently mounted and dismounted.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a plate girder formwork structure and a construction method.
Background
The laminated floor slab is an assembled integral floor slab formed by laminating prefabricated slabs and cast-in-place reinforced concrete layers. The prefabricated slab is one of the components of floor slab structure and also is a permanent formwork for in-situ cast laminated steel-concrete layer, and horizontal pipeline may be laid in the in-situ cast laminated layer. The composite floor slab has good integrity and high rigidity, can save templates, has smooth upper and lower surfaces, is convenient for finishing a finish coat, and is suitable for high-rise buildings and large-bay buildings with higher requirement on the integral rigidity.
The thickness of the prefabricated part of the composite floor slab is generally 40-50mm, and the rigidity and the bearing capacity are very small. In the prior art, a method for improving the rigidity of a precast slab and solving the problem of shear resistance of a new concrete interface and an old concrete interface of a laminated layer by adopting a steel bar truss laminated slab specifically comprises the steps of binding a steel bar truss and steel bars in the precast slab into a whole, reserving part of steel bars and pouring later-poured concrete into the whole laminated slab. However, the prefabricated part of the laminated slab manufactured by the method is not enough to bear the load in the post-pouring process of the laminated slab, and a support frame is required to be arranged below the slab, so that the advantages of the laminated slab cannot be fully exerted.
Disclosure of Invention
Based on the above description, the invention provides a plate truss formwork structure and a construction method, a detachable web member and a lower chord member are arranged to be combined with an upper chord composite slab base layer to form a space triangular plate truss, the space triangular plate truss is placed at a position (usually a wall, a beam or an upper chord support) required by the design of the composite slab to form a stable structure body to serve as a template and a construction platform of a post-cast part of the composite slab, when the strength of the post-cast part of the composite slab meets the design requirement, the lower chord member and the web member can be detached to form a pure composite slab, and the lower chord member and the web member can be recycled. The technology combines a structural method with a construction technology, realizes the unification of the plate, the frame and the mould, does not need lower vertical support in the construction process, can greatly improve the construction speed, reduces the material consumption, and realizes the scaffold-free construction of the medium-span and large-span plates. The use of the laminated slab can also effectively improve the integrity and the anti-seismic performance of the structure and improve the defect that the integrity of the assembled structure is weak.
The technical scheme for solving the technical problems is as follows: a plate truss mould frame structure comprises an upper chord plate and a lower chord; the upper chord plate is simultaneously used as a construction platform for the base layer of the laminated slab and the post-cast layer of the laminated slab; the web members with the lower chord is located the below of last chord, and the lower chord is connected through a plurality of web members the last chord, just the web members all with last chord other the web members detachably connects.
On the basis of the technical scheme, the invention can be further improved as follows.
Furthermore, two rows of upper nodes are symmetrically arranged on two sides of the upper chord plate, and a row of lower nodes are arranged on the lower chord; and the upper node and the lower node which are adjacent are connected through the web members, so that the web members form a space triangular truss structure.
Further, the two rows of upper nodes are arranged in parallel, and the lower nodes are both positioned right below the symmetry axes of the two rows of upper nodes.
Further, the upper node comprises a sleeve, an upper base plate, a lower base plate, a bolt, a limiting plate, a nut and a connecting plate; the sleeve is vertically embedded in the upper chord plate, the upper padding plate is fixed to the top of the sleeve and clings to the upper surface of the upper chord plate, and the lower padding plate is fixed to the bottom of the sleeve and clings to the lower surface of the post-cast layer of the laminated slab; the bolt vertically penetrates through the sleeve from top to bottom, and the limiting plate is fixed on the bolt; the upper backing plate is provided with an upper through hole, the lower backing plate is provided with a lower through hole, the upper through hole is matched with the limiting plate, and the lower through hole is used for enabling the bolt to penetrate through but blocking the limiting plate; the nut is in threaded connection with the bolt and is positioned below the lower base plate; the connecting plate set up in between the lower bolster with the nut, the top of web member is fixed in respectively the connecting plate.
Further, the limiting plate is in sliding fit with the inner wall of the sleeve.
Furthermore, the cross section of the sleeve and the upper through hole are both square, and the lower through hole is circular.
Further, the lower chord member is made of section steel, steel bars or steel cables.
Further, the lower chord is parallel to the long span direction of the upper chord.
The invention also provides a construction method of the plate girder formwork, which uses any one of the plate girder formwork structures and comprises the following steps:
(a) hoisting the plate girder formwork structure by using hoisting equipment and placing the plate girder formwork structure at a position required by design; a plate truss is used as a supporting system to replace a scaffold and a template, so that the material consumption and the construction period are effectively reduced, the cost is saved, (b) a post-cast layer of the laminated slab is cast on the top of the upper chord plate, and the upper chord plate and the post-cast layer of the laminated slab form the laminated slab;
(c) and when the strength of the laminated slab reaches the design requirement, the lower chord member and the web member are dismantled.
Further, before step (a), the method further comprises:
(a1) and connecting the upper chord plate and the web members on site.
Compared with the prior art, the technical scheme of the application has the following beneficial technical effects:
1. according to the invention, the detachable web members and the lower chord members are arranged, when the strength of the laminated slab meets the design requirement, the lower chord members and the web members can be detached, so that the lower chord members and the web members are recycled, and the cost is greatly reduced;
2. the sleeves are embedded in the upper nodes, and the upper chord and the web members are connected through the screw rods with the limiting plates and the sleeves, so that the lower chord and the web members can be conveniently installed and detached;
3. the plate truss is used as a support system to replace a scaffold and a template, so that the material consumption and the construction period are effectively reduced, and the cost is saved.
Drawings
Fig. 1 is a schematic structural diagram of a plate truss formwork structure according to an embodiment of the present invention;
FIG. 2 is a schematic view of a girder formwork structure according to an embodiment of the present invention in use;
FIG. 3 is a schematic illustration of the disassembly of web members and lower chords of a truss formwork structure in an embodiment of the invention;
FIG. 4 is a schematic structural diagram of an upper node according to an embodiment of the present invention;
in the drawings, the components represented by the respective reference numerals are listed below:
1. an upper chord; 11. an upper node; 111. a sleeve; 112. an upper base plate; 113. a lower base plate; 114. a bolt; 115. a limiting plate; 116. a nut; 117. a connecting plate; 2. post-pouring layers of the laminated slabs; 3. a web member; 4. a lower chord; 41. and (5) a lower node.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that spatial relationship terms, such as "under", "below", "beneath", "below", "over", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements or features described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary terms "under" and "under" can encompass both an orientation of above and below. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations) and the spatial descriptors used herein interpreted accordingly.
A plate girder formwork structure comprises an upper chord 1 and a lower chord 4. The upper chord 1 is horizontally arranged, and the upper chord 1 is arranged at a position required by design.
The lower chords 4 are disposed in parallel below the upper chord 1, and the lower chords 4 are parallel to the long span direction of the upper chord 1. The lower chord plate 4 is connected with the upper chord plate 1 through a plurality of web members 3, specifically, two rows of upper nodes 11 are symmetrically arranged on two sides of the upper chord plate 1, and one row of lower nodes 41 are arranged on the lower chord 3. The lower nodes 41 are located right below the symmetry axes of the two rows of upper nodes 11, and the lower nodes 41 are located between every two upper nodes 11 along the extending direction of the upper nodes 11. The adjacent upper node 11 and the lower node 41 are connected through the web members 3, so that the web members 3 form a space triangular truss structure. The web members 3 and the lower chord members 4 can be made of steel materials such as section steel or reinforcing steel bars, and the lower chord members 4 can also be made of steel cables.
The upper node 11 comprises a sleeve 111, an upper cushion plate 112, a lower cushion plate 113, a bolt 114, a limiting plate 115, a nut 116 and a connecting plate 117, and is used for detachably connecting the web member 3 to the upper chord 1 so as to realize that the web member 3 and the lower chord 4 can be detached.
The upper backing plate 112 is welded at the top of the sleeve 111, the lower backing plate 113 is welded at the bottom end of the sleeve 111, then the sleeve 111 is pre-embedded in the upper chord 1, the sleeve 111 vertically penetrates through the upper chord 11, the lower backing plate 113 is tightly attached to the bottom surface of the upper chord 1, and after the post-cast laminated slab post-cast layer 2 is poured, the upper backing plate 112 is tightly attached to the top surface of the post-cast laminated slab post-cast layer 2. The cross section of the sleeve 111 is square, the upper pad 112 is provided with an upper through hole communicated with the interior of the sleeve 111, the upper through hole is square with the same size as the inner wall of the sleeve 111, and the lower pad 113 is provided with a lower through hole communicated with the interior of the sleeve 111, and the lower through hole is circular.
The bolt 114 passes through the upper through hole, the inside of the sleeve 111 and the lower through hole from top to bottom, and the bottom extends to the lower part of the lower cushion plate 113. The top of the bolt 114 is fixed with a limiting plate 115, the limiting plate 115 is also square, the limiting plate 115 can pass through the upper through hole and is matched with the inner wall of the sleeve 111, and the limiting plate 115 cannot pass through the lower through hole. A nut 116 is threaded onto the bolt 114 and the nut 116 is located below the lower backing plate 113. The connecting plate 117 is fitted over the bolt 114, and the connecting plate 117 is located between the lower pad 113 and the nut 116. The top of the web member 3 is fixed on the corresponding connecting plate 117, and the web member 3 and the lower chord 4 can be assembled and disassembled by assembling or disassembling the connecting plate 117.
The web member 3 and the lower chord 4 are fixed by tightening the nut 116 so that the nut 116 and the lower pad 113 clamp the connecting plate 117. After the web member 3 and the lower chord member 4 are detached, the bolts are pushed upwards to make the limiting plate 115 and the upper backing plate 112 flush, so that the bolts 114 can be retracted into the lower backing plate 113, thereby avoiding the exposure of the bolts 114 and keeping the bottom of the plate flat.
The method of use of this example is as follows:
(a1) and respectively manufacturing the upper chord 1, the web members 3 and the lower chord 4, and carrying out on-site assembly after the upper chord, the web members and the lower chord are transported to a construction site.
(a) Hoisting the plate truss formwork structure to the position required by design through hoisting equipment, wherein the upper chord 1 forms a construction operation platform, and the web member 3 and the lower chord 4 are used for reinforcing the upper chord 1.
(b) The upper chord plate 1 is simultaneously used as a prefabricated layer base layer of the composite slab, the post-cast layer 2 of the composite slab is cast at the top of the upper chord plate 1, and the upper chord plate 1 and the post-cast layer 2 of the composite slab jointly form the composite slab.
(c) And when the strength of the laminated slab reaches the design requirement, the lower chord 4 and the web members 3 are dismantled so as to repeatedly utilize the lower chord 4 and the web members 3.
The invention combines the structure and the construction, realizes small articles and large span by using the truss structure as a construction supporting platform, achieves the aim of saving scaffolds and templates, adopts a prefabricating and assembling method, reduces the work of on-site concrete pouring to the maximum extent, provides conditions for factory production and standardization, and can greatly save the construction period and the construction cost. Meanwhile, the plate truss is used as a supporting system to replace a scaffold and a template, so that the material consumption and the construction period are effectively reduced, and the web members 3 and the lower chord members 4 can be recycled, so that the material cost is saved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A plate truss mould frame structure is characterized by comprising an upper chord (1), a web member (3) and a lower chord (4); the upper chord plate (1) is simultaneously used as a construction platform for a laminated slab base layer and a laminated slab post-cast layer (2); web member (3) with lower chord (4) are located the below of last chord (1), and lower chord (4) are connected through a plurality of web members (3) last chord (1), just web member (3) all with last chord (1) and other web member (3) detachably connects.
2. A plate truss formwork structure as claimed in claim 1, wherein two rows of upper nodes (11) are symmetrically arranged on both sides of the upper chord (1), and one row of lower nodes (41) are arranged on the lower chord (4); the upper node (11) and the lower node (41) which are adjacent are connected through the web members (3), so that the web members (3) form a space triangular truss structure.
3. A panel truss formwork structure as claimed in claim 2, wherein two rows of said upper nodes (11) are arranged in parallel, and said lower nodes (41) are located right below the symmetry axes of two rows of said upper nodes (11).
4. A panel truss formwork structure as claimed in claim 2, wherein the upper node (11) comprises a sleeve (111), an upper pad plate (112), a lower pad plate (113), a bolt (114), a limit plate (115), a nut (116) and a connecting plate (117); the sleeve (111) is vertically embedded in the upper chord plate (1), the upper padding plate (112) is fixed to the top of the sleeve (111) and used for being tightly attached to the upper surface of the post-cast layer (2) of the laminated slab, and the lower padding plate (113) is fixed to the bottom of the sleeve (111) and tightly attached to the lower surface of the upper chord plate (1); the bolt (114) vertically penetrates through the sleeve (111) from top to bottom, and the limiting plate (115) is fixed on the bolt (114); an upper through hole is formed in the upper backing plate (112), a lower through hole is formed in the lower backing plate (113), the upper through hole is matched with the limiting plate (115), and the lower through hole is used for enabling the bolt (114) to penetrate through but blocking the limiting plate (115); the nut (116) is in threaded connection with the bolt (114) and is positioned below the lower backing plate (113); the connecting plate (117) is arranged between the lower backing plate (113) and the nut (116), and the tops of the web members (3) are respectively fixed on the connecting plate (117).
5. A panel truss formwork structure as claimed in claim 4, wherein the retainer plate (115) is in sliding fit with the inner wall of the sleeve (111).
6. A panel truss formwork structure as claimed in claim 4, wherein the cross section of the sleeve (111) and the upper through hole are both square, and the lower through hole is circular.
7. A panel truss formwork structure as claimed in claim 1 wherein said lower chord member (4) is a steel section, a steel bar or a steel cable.
8. A panel truss formwork structure in accordance with claim 7 wherein said lower chord (4) is parallel to the long span direction of said upper chord (1).
9. A construction method of a plate girder formwork using the plate girder formwork structure according to any one of claims 1 to 7, comprising the steps of:
(a) hoisting the plate girder formwork structure by using hoisting equipment and placing the plate girder formwork structure at a position required by design;
(b) pouring a post-cast layer (2) of the laminated slab on the top of the upper chord plate (1), wherein the upper chord plate (1) and the post-cast layer (2) of the laminated slab form the laminated slab;
(c) and when the strength of the laminated slab reaches the design requirement, the lower chord (4) and the web members (3) are dismantled.
10. A panel truss formwork construction method as claimed in claim 9, further comprising, before step (a):
(a1) and connecting the upper chord (1), the lower chord (4) and the web members (3) on site.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111547823.2A CN114135037A (en) | 2021-12-16 | 2021-12-16 | Plate truss formwork structure and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111547823.2A CN114135037A (en) | 2021-12-16 | 2021-12-16 | Plate truss formwork structure and construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114135037A true CN114135037A (en) | 2022-03-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111547823.2A Pending CN114135037A (en) | 2021-12-16 | 2021-12-16 | Plate truss formwork structure and construction method |
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| Country | Link |
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| CN (1) | CN114135037A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114753538A (en) * | 2022-04-28 | 2022-07-15 | 重庆赛迪工程咨询有限公司 | Non-dismantling bottom formwork floor slab for different-surface construction and construction method |
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| CA664178A (en) * | 1963-06-04 | M. Watson John | Anchor bolt | |
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| CN106522555A (en) * | 2017-01-04 | 2017-03-22 | 中冶建工集团有限公司 | Pre-locking type steel strand pouring supporting frame and installation and use method thereof |
| CN107435292A (en) * | 2016-05-26 | 2017-12-05 | 招商局重庆交通科研设计院有限公司 | Fender connector |
| CN109083320A (en) * | 2018-09-26 | 2018-12-25 | 重庆普珞沃建筑科技有限公司 | Combine prefabricated panel and laminated floor slab structure and laminated floor slab construction method |
| CN111236517A (en) * | 2020-03-10 | 2020-06-05 | 朱辉祖 | Detachable prestressed reinforcement truss superimposed sheet |
| CN213015082U (en) * | 2020-07-08 | 2021-04-20 | 羽呈建筑科技(上海)有限公司 | Prefabricated composite wall panel convenient to installation |
-
2021
- 2021-12-16 CN CN202111547823.2A patent/CN114135037A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA664178A (en) * | 1963-06-04 | M. Watson John | Anchor bolt | |
| CN107435292A (en) * | 2016-05-26 | 2017-12-05 | 招商局重庆交通科研设计院有限公司 | Fender connector |
| CN106437184A (en) * | 2016-12-07 | 2017-02-22 | 中冶建工集团有限公司 | Pouring support frame for concrete laminates and mounting and using method of pouring support frame |
| CN106522555A (en) * | 2017-01-04 | 2017-03-22 | 中冶建工集团有限公司 | Pre-locking type steel strand pouring supporting frame and installation and use method thereof |
| CN109083320A (en) * | 2018-09-26 | 2018-12-25 | 重庆普珞沃建筑科技有限公司 | Combine prefabricated panel and laminated floor slab structure and laminated floor slab construction method |
| CN111236517A (en) * | 2020-03-10 | 2020-06-05 | 朱辉祖 | Detachable prestressed reinforcement truss superimposed sheet |
| CN213015082U (en) * | 2020-07-08 | 2021-04-20 | 羽呈建筑科技(上海)有限公司 | Prefabricated composite wall panel convenient to installation |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114753538A (en) * | 2022-04-28 | 2022-07-15 | 重庆赛迪工程咨询有限公司 | Non-dismantling bottom formwork floor slab for different-surface construction and construction method |
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Application publication date: 20220304 |