Cast-in-place hollow floor built-in core mold with pouring hole in middle

Abstract

The utility model discloses a cast-in-place hollow floor built-in core mold with a pouring hole in the middle, and relates to the technical field of house construction, in particular to application of the cast-in-place hollow floor built-in core mold with the pouring hole in the middle, and the use span of the cast-in-place hollow floor built-in core mold ranges from 2 m to 4 m. The core mold consists of two core mold bodies which are oppositely buckled up and down, wherein the main body of each core mold body is of a rectangular short cylindrical structure with one open end; four pouring hole columns are uniformly distributed on a bottom plate of the core mold body; the height of the pouring hole column is consistent with that of the wall of the core mold body. The core mold bodies are oppositely buckled to form a cavity; the middle pouring hole columns are opposite in pairs to form a closed pouring channel. According to the technical scheme, the problem that a small-span plate hollow floor system is commonly used in the range of 2-4 m is solved, the built-in core molds are tightly arranged, no dense rib beam is arranged between the core molds, concrete is poured and vibrated through pouring holes in the core molds, and gas is exhausted through holes in the four corners of the core molds. After the mode is adopted, the structure dead weight is reduced, and the building cost is greatly saved.

Description

Technical Field

[0001] The cast-in-situ hollow floor built-in core mold with a casting hole in the middle of the utility model relates to the technical field of building construction, and particularly relates to the application of a cast-in-situ hollow floor built-in core mold with a middle casting hole and a span of 2-4m. Background Art

[0002] With the rapid development of the hollow floor technology in China, its characteristics of light self-weight, fast construction, outstanding space effect, and saving secondary decoration enable it to be widely applied in various building fields such as shopping malls, office buildings, teaching buildings, high-rise buildings, garages, large conference rooms, underground civil air defense projects, and multi-story industrial plants with large spans of 8m-12m and large bays. In the past twenty years, the finished built-in templates for hollow floors have also been updated: various products such as hollow tubes, honeycomb cores, hollow formwork shells, and thin-walled square boxes have gradually emerged. On the premise of low cost, qualified strength, convenient construction, and easy transportation, it is a necessary condition to facilitate the overall pouring of concrete and achieve the integrity of the cast-in-situ hollow floor.

[0003] Currently, the thin-walled square box type built-in core mold has a relatively high proportion in the market. Its size is mostly a 600mmx600mm square module or rectangle. The upper and lower two mold shells are buckled to form a sealed core mold. When applied to a hollow floor (with a thickness of 250mm-350mm) with closely spaced ribs (150mm-200mm wide and the same height as the slab thickness) arranged in two directions, the quality of concrete pouring can be guaranteed.

[0004] However, in the case of the commonly used slab span (generally 2m-4m), when it is necessary to achieve a hollow floor structure without beam protrusions at the bottom of the slab (for example, the effect of fair-faced concrete on all four sides), it is not necessary to set closely spaced ribs. It is only necessary to arrange the built-in core molds closely. However, since ordinary built-in core molds are all closed cavities, if they are arranged closely, the overall pouring of concrete cannot be achieved. If closely spaced ribs are added to ensure the quality of overall concrete pouring, or a certain spacing is left between the core molds to ensure the quality of concrete pouring, then a certain amount of steel bars and concrete will be increased, the self-weight of the structure will be increased, and the construction cost will also be greatly increased. Therefore, the above methods are not recommended.

[0005] In view of the problems existing in the above-mentioned prior art, it is very necessary to research and design a new type of cast-in-situ hollow floor built-in core mold with a casting hole in the middle, so as to overcome the problems existing in the prior art. Summary of the Invention

[0006] In the small-span hollow floor slab structure of common plates with a span of 2-4m proposed according to the above-mentioned prior art, if the internal formwork is closely arranged without setting ribbed beams, the overall pouring of concrete cannot be achieved; if there is a spacing between the internal formworks, the amount of reinforced concrete is increased, resulting in an increase in the self-weight of the structure and a significant increase in construction costs. Therefore, an internal formwork for a cast-in-place hollow floor slab with a pouring hole in the middle is provided to solve the above problems.

[0007] The technical means adopted by the present utility model are as follows:

[0008] An internal formwork for a cast-in-place hollow floor slab with a pouring hole in the middle is composed of two formwork bodies that are buckled up and down relatively. The main body of the formwork body is a rectangular short barrel-shaped structure with one end open.

[0009] Furthermore, 4 pouring hole columns for pouring concrete are evenly arranged on the bottom plate of the formwork body.

[0010] Furthermore, the height of the pouring hole columns is the same as the height of the wall of the formwork body.

[0011] Furthermore, the external dimension A of the formwork body is 1200mm.

[0012] Furthermore, the diameter of the pouring hole columns is 150mm.

[0013] Furthermore, the hole spacing between two adjacent pouring hole columns is 600mm.

[0014] Furthermore, the four corners at the bottom of the formwork body are respectively rounded, and the rounding radius R is 50mm.

[0015] Furthermore, the bottom plate of the formwork body is slope-processed into a basin-shaped structure to facilitate the discharge of air bubbles in the concrete at the bottom of the form during vibration.

[0016] Furthermore, in the construction, the two formwork bodies are buckled up and down relatively to form a cavity; the pouring hole columns in the middle are opposite to each other in pairs to form a closed pouring channel, which also serves as a vertical support.

[0017] The use process of the present utility model is as follows:

[0018] Since the bottom elevation of the slab is the same as that of the beam, first support the bottom formwork of the hollow floor slab and the bottom formwork of the beam. Then lay and tie the bottom steel mesh of the floor slab and the longitudinal and stirrup steel bars of the beam on the formwork. Next, closely arrange the core molds of the hollow floor slab between the steel skeletons of the concrete beam. The core molds are buckled up and down. Then lay and tie the upper steel mesh. To ensure that the core molds do not float, precast concrete cushion blocks are used to fill between the core molds and the upper and lower steel meshes at both the top and bottom of each core mold. At the same time, it also ensures that the steel bar protection layer of the steel mesh meets the requirements. After the core molds and the steel bars of the beam and slab are firmly tied, then concrete pouring is carried out. The concrete flows through the four pouring holes of the core mold to the bottom of the core mold, filling the bottom cavity of the core mold. Then it further fills the gaps between the pouring holes and the core molds, and then covers the upper slab area above the core molds. During the concrete pouring, the vibrator is inserted into the pouring holes of the core mold for vibration. During the process of concrete vibration, the concrete will gradually become dense, and the gas in the concrete will climb along the slope of the basin-shaped bottom of the core mold to the pouring holes and the exhaust holes at the four corners for discharge, thus ensuring the pouring quality of the concrete.

[0019] Compared with the prior art, the utility model has the following advantages:

[0020] 1. The built-in core mold of the cast-in-place hollow floor slab with pouring holes in the middle provided by the utility model is provided with at least 4 pouring holes with a diameter of 150 mm, and the concrete can flow smoothly to the bottom of the hollow slab through the pouring holes;

[0021] 2. The built-in core mold of the cast-in-place hollow floor slab with pouring holes in the middle provided by the utility model, the vibrator can be inserted into the pouring holes for concrete vibration, ensuring smooth flow during the construction stage of cast-in-place concrete and achieving the density of the bottom concrete of the hollow slab to meet the national specification requirements;

[0022] 3. The built-in core mold of the cast-in-place hollow floor slab with pouring holes in the middle provided by the utility model, chamfers are made at the four corners, and at the same time, the bottom of the mold is sloped and processed into a basin shape, so that the air bubbles in the bottom concrete are discharged during the vibration process, ensuring that the quality of the concrete meets the standards;

[0023] 4. The built-in core mold of the cast-in-place hollow floor slab with pouring holes in the middle provided by the utility model is provided with at least 4 pouring holes, which vertically support the two buckled core mold bodies, increasing the stiffness of the whole core mold. Furthermore, the thickness of the core mold material can be reduced, thus achieving material saving and cost reduction;

[0024] 5. The built-in core mold of the cast-in-place hollow floor slab with pouring holes in the middle provided by the utility model, the core mold bodies have the same size and can be directly stacked together, which can save a large amount of space compared with the general integrally closed core mold, saving transportation costs.

[0025] In summary, by applying the technical solution of the present utility model, the problems in the prior art are solved. In the common small-span slab hollow floor structure with a span of 2-4m, if the built-in core molds are only closely arranged, the overall pouring of concrete cannot be achieved. If there are spaces between the built-in core molds, the amount of reinforced concrete is increased, resulting in an increase in the self-weight of the structure and a significant increase in construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 It is a schematic structural diagram of the present utility model;

[0028] Figure 2 It is a construction state diagram of the present utility model.

[0029] Figure 3 It is a three-dimensional diagram of a single core mold of the present utility model;

[0030] Figure 4 It is a schematic diagram of the arrangement of the built-in core molds of the present utility model.

[0031] In the figure: 1, core mold body; 2, bottom plate; 3, pouring hole column; 4, body wall; 5, upper steel mesh; 6, bottom steel mesh. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other. The following will refer to the drawings and combine the embodiments to detail the present utility model.

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. The description of at least one exemplary embodiment is actually only illustrative and in no way restrictive of the present utility model and its application or use. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0034] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present utility model. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0035] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present utility model. At the same time, it should be clear that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorized specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not require further discussion in subsequent drawings.

[0036] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom" are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Without contrary instructions, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus cannot be construed as limiting the protection scope of the present utility model: the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0037] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. can be used here to describe the spatial positional relationship between a device or feature shown in the figure and other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figure for the device. For example, if the device in the attached drawing is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0038] In addition, it should be noted that the use of terms such as "first", "second" etc. to define components is only for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings, so they cannot be understood as limiting the protection scope of the present utility model.

[0039] As shown in the figure, the present utility model provides an in-situ cast hollow floor built-in core mold with a casting hole in the middle. When it comes to the situation where the floor slabs with a conventional span of 2 - 4m require the bottom surfaces of the slabs and beams to be flush, the hollow floor form can be adopted. The bottom surfaces of the slabs are flush, without side beams protruding, and it is integrally cast in one go. The present utility model can be used. The outer shape of the core mold body 1 of the present utility model is a rectangular structure with a length and width of 1200mm. Concrete casting hole columns 3 with a spacing of about 600mm are arranged in the middle of the bottom plate 2. The inner diameter of the casting hole columns 3 is about 150mm. When casting concrete, the concrete can flow smoothly through the casting hole columns to the bottom of the hollow slab. At the same time, the vibrating rod can be inserted into this hole to vibrate the concrete, ensuring smooth flow and reliable vibration during the in-situ cast concrete construction stage, and achieving the compactness of the bottom layer concrete of the hollow slab meeting the national specification requirements. Chamfers of 50mm are made at the four corners of the core mold body 1. At the same time, the bottom of the mold can be appropriately sloped to form a shape similar to a basin, which is convenient for exhausting air bubbles in the concrete during vibration at the bottom of the mold and ensuring the quality of the concrete meets the standards. The built-in core mold can be formed by buckling two upper and lower core mold bodies 1 to form a cavity. Under the vertical support of the middle casting hole columns 3, the stiffness of the entire built-in core mold is greatly enhanced. Furthermore, the thickness of the core mold material can be reduced, thus achieving material savings and cost reduction. The two upper and lower core mold bodies 1 of the built-in core mold have the same size and can be directly stacked together, which can save a large amount of space compared with general core molds that are integrally enclosed, and greatly saves the transportation cost.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cast-in-place hollow floor with a built-in core mold having a pouring hole in the middle, characterized in that: The built-in core mold of the cast-in-place hollow floor with a pouring hole in the middle is composed of two core mold bodies (1) buckled up and down relative to each other, and the main body of the core mold body (1) is a core mold body (1) with a rectangular short cylindrical structure with one end open; Four pouring hole columns (3) for pouring concrete are evenly arranged on the bottom plate (2) of the core mold body (1); The height of the casting hole column (3) is consistent with the height of the body wall (4) of the core mold body (1).

2. The cast-in-place hollow floor with a casting hole in the middle according to claim 1 is characterized in that: The outer dimension A of the core mold body (1) is 1200 mm; The diameter of the casting hole column (3) is 150 mm; The hole spacing between two adjacent casting hole columns (3) is 600 mm.

3. The cast-in-place hollow floor with a casting hole in the middle according to claim 1 is characterized in that: The four corners of the bottom of the core mold body (1) are rounded respectively, and the rounding radius R is 50 mm.

4. The cast-in-place hollow floor with a casting hole in the middle according to claim 1 is characterized in that: The bottom plate of the core mold body (1) is sloped and processed into a basin-like structure, which facilitates the exhaust of air bubbles from the mold bottom concrete during the vibration process.

5. The cast-in-place hollow floor with a casting hole in the middle according to claim 1 is characterized in that: During construction, the core mold body (1) is buckled up and down to form a cavity; the middle casting hole columns (3) are opposite to each other to form a closed casting channel, and at the same time play a vertical support role.

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