CN111851804A - A prefabricated formwork-free structural body formwork and a cast-in-place formwork-free structural body - Google Patents

Abstract

The invention discloses an assembled formwork-free structural body formwork, comprising a structural body formwork formed by splicing formwork units. There are structural ribs, which are characterized in that: the formwork unit includes a prefabricated integral formwork and a dismantling-free formwork, and the prefabricated integral formwork comprises a transverse steel member and a longitudinal steel member, and the transverse steel member and the longitudinal steel member are welded into a frame; the outer surface of the prefabricated integral formwork formed by welding is the reference plane; a dismantling-free formwork is laid on the base plane side of the prefabricated integral formwork; the dismantling-free formwork is fixedly connected with the prefabricated integral formwork through fasteners; the prefabricated integral formwork The integral formwork is welded or bound with the structural reinforcement in the pouring cavity of the structure body, and the transverse or longitudinal steel members of the adjacent prefabricated integral formwork are made of C-shaped steel. The invention has the advantages of simple structure, convenient processing, improved construction efficiency, good rigidity and the like.

Description

A prefabricated formwork-free structural body formwork and a cast-in-place formwork-free structural body

technical field

The invention belongs to the technical field of construction engineering, and in particular relates to a prefabricated formwork-free structural body formwork and a cast-in-place formwork-free structural body.

Background technique

At present, the traditional scattered wood formwork that is still widely used in the construction industry is not only easy to use a large amount of wood resources, but also time-consuming and labor-intensive to install and dismantle, and turns into construction waste after many times of turnover. With the promotion of the modernization of the construction industry, the application of prefabricated technology has become more and more extensive, and the proportion of components in the building has gradually increased. At present, the market is vigorously promoting prefabricated buildings, which are assembled with components on the site. The prefabricated building has the advantages of fast construction speed, green construction, and labor saving; but the prefabricated building needs large-scale lifting machinery, many construction nodes, and cannot be transported long-distance during the installation process.

A new technology-free formwork technology came into being, because of its simple support, simplified construction process, no need for formwork removal and plastering, less turnover of materials, saving formwork supports, greatly shortened construction period, and less construction waste. , good thermal insulation performance and other advantages, promote the development of industrialized construction technology in the entire construction industry. However, most of the dismantling-free formwork in the prior art use fiber cement flat plate or calcium silicate board as the dismantling-free formwork. When assembling floor slabs, beams and columns on site, only angle steel is used for connection, and the way of binding between the dismantling-free formwork and the angle steel is adopted. Fixing is not only time-consuming and labor-intensive, but also the installation is not firm, which affects the construction quality.

In the prior art, it is also disclosed that a fixed skeleton of the dismantling-free formwork is used as a reinforcing rib, and then transverse or longitudinal steel bars are bound or welded on the skeleton. According to actual research, this method can improve the bearing strength of the dismantling-free formwork; The construction efficiency is relatively slow; there is instability of the steel bar in the way of binding.

Therefore, when constructing the formwork of the formwork-free structure, how to realize the quick installation of the formwork on the construction site, further accelerate the construction progress, solve the problem of rigidity and deformation of the formwork, increase the scope of application, and make the installation simpler, It is the problem to be solved in this case to be firm and at the same time to ensure the safety of construction.

SUMMARY OF THE INVENTION

Aiming at the problems existing in the prior art, the present invention provides a prefabricated formwork-free structural body formwork and a cast-in-place formwork-free structural body which are simple in structure, easy to process, adopt factory prefabricated on-site assembly and construction, and improve construction efficiency.

The present invention is realized in the following way: a prefabricated formwork-free structural body formwork comprises a structural body formwork formed by assembling formwork units; Structural ribs are fixed inside, and it is characterized in that: the formwork unit includes a prefabricated integral formwork and a dismantling-free formwork, wherein the prefabricated integral formwork comprises a transverse steel member and a longitudinal steel member, and the transverse steel member and the longitudinal steel member The components are welded into a frame; the outer surface of the welded prefabricated integral formwork is the reference plane; a dismantling-free formwork is laid on the base plane side of the prefabricated integral formwork; the dismantling-free formwork is fixedly connected with the prefabricated integral formwork through fasteners; The prefabricated integral formwork is welded or bound with structural bars in the pouring cavity of the structure body, and the transverse or longitudinal steel members of the adjacent prefabricated integral formwork are made of C-shaped steel.

Preferably, the above technical solution is characterized in that: the prefabricated integral formwork further includes an intermediate steel member, and both ends of the intermediate steel member are welded and connected to the transverse steel member or the longitudinal steel member on the corresponding side.

Preferably, the transverse steel member and/or the longitudinal steel member includes at least a lower support portion, and the lower surface of the lower support portion is a horizontal reference plane and an upper support portion for supporting the steel truss; connecting the lower support portion. Support part and upper support part riser.

Preferably, in the above technical solution, the height of the upper surface of the upper support portion from the lower reference plane is not less than 15 mm.

In the above technical solution, preferably, the cross-sectional shapes of the transverse steel members and the longitudinal steel members are C-shaped, I-shaped, L-shaped, T-shaped, rectangular or glyph-shaped.

Preferably, in the above technical solution, the vertical plates of the transverse steel member and the vertical steel member are provided with slurry holes.

In the above technical solution, preferably, the connection side between the dismantling-free template and the prefabricated integral frame is provided with grooves or irregular protrusions are processed by brushing.

Preferably, in the above technical solution, steel mesh is pre-embedded in the dismantling-free formwork.

Preferably, in the above technical solution, concrete is poured in the above-mentioned structural body casting cavity, and the concrete is poured and formed to form a structural body, and the structural body is a structural column, a structural beam, a staircase or a wall.

Advantages and positive effects of the present invention: the structural body formwork assembled by the formwork can be prefabricated and installed on site by factory, and the structure is stable and reliable; compared with the traditional wooden formwork, the demoulding construction is reduced, and the life span is the same as that of the floor slab ;Compared with the traditional structural aluminum formwork and wood formwork support, this kind of free formwork has high rigidity, good integrity, simple support tools or no support; Cast-in-place construction is of high quality. Compared with the existing cast-in-place prefabricated concrete composite panels, it has the advantages of light weight, factory processing speed block, easy transportation and hoisting, low load-bearing requirements for support tools, and high cast-in-place construction quality.

Description of drawings

Fig. 1 is the structural schematic diagram of structural beam formwork shell of the present invention;

Fig. 2 is the three-dimensional structure schematic diagram of structural beam formwork;

Fig. 3 is the schematic diagram of the connection structure between the prefabricated integral formwork and the structure;

Fig. 4 is the three-dimensional structure schematic diagram of Fig. 3;

Fig. 5 is the structure schematic diagram of dismantling-free formwork;

Fig. 6 is the left side view of Fig. 1;

Fig. 7 is the structural schematic diagram of structural column formwork;

Fig. 8 is the top view of Fig. 7;

9 is a schematic diagram of the connection structure between the prefabricated integral formwork of the structural column and the structural rib;

Figure 10 is a schematic diagram of the staircase structure;

Figure 11 is a schematic diagram of the wall structure;

Figure 12 is a schematic structural diagram of a transverse steel member or longitudinal steel member with grout holes;

Figure 13 is a schematic diagram of the structure of the dismantling-free formwork with steel mesh.

In the figure, 1, formwork unit; 1-1, prefabricated integral formwork; 1-10, transverse steel member; 1-11, lower support part; 1-12, upper support part; 1-13, vertical plate; 1- 14. Grout hole; 1-20, Longitudinal steel member; 1-2, Free dismantling formwork; 1-21, Groove; 2, Structural reinforcement; 3, Fastener.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

Please refer to FIG. 1 to FIG. 6 , an assembled formwork-free formwork structure. This embodiment is described by taking a structural beam formwork as an example, including a structural beam formwork assembled by a formwork unit 1. The said A structural beam casting cavity is formed in the structural beam formwork, and a structural rib 2 is fixed in the structural beam casting cavity. The formwork unit includes a prefabricated integral formwork 1-1 and a dismantling-free formwork 1-2. The formwork includes transverse steel members 1-10 and longitudinal steel members 1-20, and the transverse steel members and the longitudinal steel members are welded to form a structural beam frame open above; the outer surface of the welded prefabricated integral formwork is a reference plane; The base plane side of the prefabricated integral formwork is laid with a dismantling-free formwork; the dismantling-free formwork is fixedly connected with the prefabricated integral formwork through the fasteners 3; the prefabricated integral formwork is welded or bound with the structural ribs in the structural beam casting cavity, The transverse steel members or longitudinal steel members of the adjacent prefabricated integral formwork are C-shaped steel. Concrete is poured in the above-mentioned structural beam formwork, and the structural beam is formed after the concrete is solidified.

The above-mentioned fasteners are preferably self-tapping screws with a certain cutting force and a certain self-locking function to ensure the stability and firmness of the connection-free formwork and the prefabricated overall frame; Hanging on the prefabricated integral frame, the prefabricated integral formwork improves the overall flexural resistance and compressive resistance of the dismantling-free formwork, and improves the safety. It is equivalent to pre-embedding in concrete, thus forming a structure with the same life span as the formwork and the structure.

The present invention can be prefabricated and installed on site by factory; compared with the traditional wooden formwork, the formwork construction is reduced, and it has the same life as the floor slab; The support tools are simple, or support is free; compared with concrete structural beams, the formwork of this formwork-free structure is light in dead weight and high in cast-in-place construction quality. Compared with the existing precast concrete structural beams, it has the advantages of light weight, factory processing speed block, easy transportation and hoisting, low load-bearing requirements for floor support tools, and high cast-in-place construction quality.

Preferably, in the above technical solution, the prefabricated integral formwork further includes an intermediate steel member, and both ends of the intermediate steel member are connected by welding with the transverse steel member or the longitudinal steel member on the corresponding side. For the prefabricated integral formwork with larger size, the intermediate steel member improves the strength of the integral formwork, disperses the force evenly, and ensures the safety and reliability of the formwork system.

Preferably in the above technical solution, the transverse steel member and/or the longitudinal steel member include at least lower support portions 1-11, and the lower surface of the lower support portion is a horizontal reference plane, and this horizontal reference plane ensures that the transverse steel member and/or Or longitudinal steel members are also a horizontal datum plane after splicing into a frame, which ensures the flatness after splicing without dismantling the formwork, and lays the foundation for the later painting and leveling; an upper support part 1-12 used to support the steel truss, the upper support part is used as The foundation of the reinforced truss support ensures the stability of the reinforced truss support; the vertical plates 1-13 connecting the lower support part and the upper support part, the vertical plates mainly play the role of force support, and the vertical plates have a certain height; The height of the upper surface of the upper support part from the lower reference plane is not less than 15mm. The design of this distance ensures that a concrete protective layer is formed after the concrete is poured, so that the steel truss of the main bearing member is not exposed, and the life of the structure is improved.

Preferably, the cross-sectional shape of the transverse steel member and the longitudinal steel member is C-shaped, I-shaped, L-shaped, T-shaped, rectangular or a few-shaped, the preferred C-shaped structure in this embodiment, and the two C-shaped channel steel. Each web is provided with a bend inward, and after the C-shaped groove is poured, the densely filled concrete is solidified to form a firm connection structure with the concrete structure, so as to improve the installation strength of the prefabricated integral formwork 1 .

When transported to the site for overall hoisting, the structural formwork is lapped with the construction progress of beams, columns, shear walls and other structural bodies of the building according to the construction requirements, and then the structural bars play the main bearing role before pouring. At this time, the traditional wooden formwork can be supported by simple support or no support; after the pouring is completed, the cement fiber board is connected with the concrete, which greatly improves the construction efficiency, and has high rigidity and good integrity.

Please refer to FIG. 7 and FIG. 9 , an assembled formwork-free formwork structure. In this embodiment, the structural body is a structural column, including a structural column formwork assembled by template units. The structural column formwork A structural column pouring cavity is formed inside, and structural ribs are fixed in the structural column pouring cavity. The formwork unit includes a prefabricated integral formwork 1-1 and a dismantling-free formwork 1-2. The prefabricated integral formwork comprises a transverse steel Member 1-10 and longitudinal steel member 1-20, the transverse steel member and longitudinal steel member are welded into a structural column frame; the outer surface of the welded prefabricated integral formwork is the reference plane; on the reference plane side of the prefabricated integral formwork Lay the dismantling-free formwork; the dismantling-free formwork is fixedly connected with the prefabricated integral formwork through fasteners 3; C-section steel is used for transverse steel members or longitudinal steel members. Concrete is poured in the above-mentioned structural column and beam formwork, and the structural column is formed after the concrete is solidified.

Please refer to FIG. 10, an assembled formwork-free stair formwork, including a stair formwork assembled by side formwork, vertical formwork, step formwork and prefabricated integral formwork 1-1, which is the prefabricated integral formwork Weld into a frame according to the structural shape of the stair; a structural stair casting cavity is formed in the stair formwork, and a structural rib is fixed in the structural stair casting cavity, and the side formwork, vertical formwork and tread formwork adopt dismantling-free formwork 1-2 , which is fixed and installed on the prefabricated integral formwork by self-tapping screws.

Please refer to Fig. 11, a prefabricated formwork-free wall includes a wall formwork and structural ribs formed by assembling an inner formwork unit and an outer formwork unit. The inner and outer formwork units include a prefabricated integral formwork 1- 1 and the dismantling-free formwork 1-2; the prefabricated integral formwork 1-1 is fixedly connected to the structural steel bar by binding or welding, and a wall formwork casting cavity is formed in the wall formwork, and the casting cavity is poured in the above-mentioned wall formwork Concrete, after the concrete is solidified, a formwork-free wall is formed.

Preferably in the above technical solution, the vertical plates of the transverse steel member and the vertical steel member are provided with slurry holes 1-14, please refer to FIG. 12, the design purpose of the slurry holes is to facilitate the communication of concrete on both sides of the vertical plate, It is conducive to the dense filling of concrete, and at the same time, steel bars can be transversely penetrated in the slurry hole to improve the structural strength; in addition, the weight can be reduced without affecting the support strength.

In the above technical solution, preferably, grooves 1-21 are provided on the connecting side of the dismantling-free template 2 and the prefabricated integral frame, or irregular protrusions are processed by brushing.

Preferably, in the above technical solution, steel meshes 1-22 are pre-embedded in the dismantling-free formwork, which improves the strength of the formwork and is suitable for different load-bearing and bending resistance requirements; please refer to Figure 13.

The structural formwork formed by the formwork of the present invention can be prefabricated and installed on site; compared with the traditional wooden formwork, the formwork construction is reduced, and the service life is the same as that of the floor slab; compared with the traditional structural aluminum formwork and wooden formwork support, this This kind of non-demolition form shell has high rigidity, good integrity, simple supporting tools or no support; compared with concrete prefabricated laminated panels, this kind of non-demolition form shell has light weight and high quality of cast-in-place construction. Compared with the existing cast-in-place prefabricated concrete composite panels, it has the advantages of light weight, factory processing speed block, easy transportation and hoisting, low load-bearing requirements for support tools, and high cast-in-place construction quality.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (9)

1. The utility model provides a reassembling free mould structure body mould shell, includes the structure body mould shell that forms by the concatenation of template unit, form the structure body in the structure body mould shell and pour the chamber, pour the intracavity fixation at the structure and be equipped with structure muscle, its characterized in that: the formwork unit comprises a prefabricated integral formwork and a disassembly-free formwork, the prefabricated integral formwork comprises a transverse steel member and a longitudinal steel member, and the transverse steel member and the longitudinal steel member are welded into a frame; the outer surface of the welded prefabricated integral die frame is a datum plane; laying a non-dismantling template on the side of a reference plane of the prefabricated integral formwork; the non-dismantling formwork is fixedly connected with the prefabricated integral formwork through a fastener; the prefabricated integral formwork is welded or bound with the structural ribs in the structural body pouring cavity, and the transverse steel members or the longitudinal steel members of the adjacent prefabricated integral formwork are C-shaped steel.

2. The fabricated demolition-free formwork form of claim 1, wherein: the method is characterized in that: the prefabricated integral formwork further comprises an intermediate steel member, and two ends of the intermediate steel member are connected with the transverse steel member or the longitudinal steel member on the corresponding side in a welded mode.

3. The fabricated demolition-free formwork form of claim 1, wherein: the transverse steel member and/or the longitudinal steel member at least comprise a lower supporting part, the lower surface of the lower supporting part is a horizontal reference surface, and the upper supporting part is used for supporting the steel bar truss; the lower supporting part and the upper supporting part vertical plate are connected.

4. The fabricated demolition-free formwork form of claim 3, wherein: the height of the upper surface of the upper supporting part from the lower reference surface is not less than 15 mm.

5. The fabricated demolition-free formwork form of claim 1, wherein: the cross sections of the transverse steel members and the longitudinal steel members are C-shaped, I-shaped, L-shaped, T-shaped, rectangular or n-shaped.

6. The fabricated demolition-free formwork form of claim 1, wherein: and slurry passing holes are formed in the vertical plates of the transverse steel member and the longitudinal steel member.

7. The fabricated demolition-free formwork form of claim 1, wherein: the connecting side of the non-dismantling formwork and the prefabricated integral framework is provided with a groove or is provided with an irregular bulge by adopting napping treatment.

8. The fabricated demolition-free formwork form of claim 1, wherein: and a steel mesh is pre-embedded in the non-dismantling formwork.

9. The cast-in-place non-dismantling formwork structure as claimed in any one of claims 1 to 8, wherein: pouring concrete into the structure pouring cavity of any one of the claims 1 to 8, and pouring the concrete to form a structure, wherein the structure is a structural column, a structural beam, a stair or a wall.

Images