CN110670875A

CN110670875A - Concrete formwork system

Info

Publication number: CN110670875A
Application number: CN201910959913.9A
Authority: CN
Inventors: 吴小东
Original assignee: Xuzhou Zhongqing Construction Technology Co Ltd
Current assignee: Xuzhou Zhongqing Construction Technology Co Ltd
Priority date: 2019-10-10
Filing date: 2019-10-10
Publication date: 2020-01-10

Abstract

A concrete form system is disclosed, the form including a flexible tube placed prior to the pouring of a concrete slab. The template includes a cage that excludes material from the apertures formed in the template. The form also includes a key structure that allows the form to be easily removed once the concrete has set. The system also includes a targeting device that allows for rapid and accurate alignment for placement of the template when forming the conduit in a multi-story building. An attachment is also provided to fill the openings formed by the template once the wires, pipes and other objects are installed in the conduit.

Description

Concrete formwork system

Technical Field

The invention relates to the technical field of concrete formworks, in particular to a concrete formwork system.

Background

In the construction field, concrete is commonly used as a structural material in floors and walls. In creating concrete structures, it is also often necessary to make certain provisions to create paths through the concrete for various electrical and mechanical services. For example, channels or conduits in concrete allow for the passage of wiring, pipes and similar services from one side of the concrete structure to the opposite side.

One method of forming a channel in a concrete slab is to cut a hole after the concrete has set. This method has several disadvantages, including that it is a time consuming process and risks damaging the concrete and steel bars that are often present inside the slab. Another approach is to create the required passages in the concrete slab using pipes or forms. There are several examples in the prior art which describe forms for creating voids in concrete panels through which components such as electrical wires and pipes can later be passed when the building is completed.

A more modern solution to this problem involves placing a hollow form within the space in which the slab is to be cast. The hollow form creates a void in the concrete that can later be used to deliver electrical and mechanical services. In some cases, the form remains in place and is therefore only one use. In other cases, the table may be deleted and thus reused.

These prior art examples of catheters and forms all suffer from various limitations. For example, in the case where the form cannot be reused, a large amount of material and cost are wasted. Even with reusable forms, there are still some limitations. For example, in the construction of multi-storey buildings, electrical and mechanical services are typically run from floor to floor. This requires alignment of the conduit holes in subsequent floors so that service can be used along a straight path and when ascending or descending within the building.

Also, the prior art devices do not easily provide a way to accomplish this step in situations where it is desired to fill the catheter after the service is in place. Also, when the form is removed, there is no way to easily include reinforcing material such as rebar to improve the structural performance within the previous conduit void.

Disclosure of Invention

The following discussion provides a number of example embodiments of the present subject matter. While each embodiment represents a single combination of inventive elements, the inventive subject matter is considered to include all possible combinations of the disclosed elements. Thus, if one embodiment includes elements a, B, and C, and a second embodiment includes elements B and D, then the inventive subject matter is also considered to include other remaining combinations of a, B, C, or D, even if not included.

Unless the context indicates to the contrary, all ranges set forth herein are to be construed as inclusive of their endpoints, and open ranges are to be construed as exclusive of commercially practical values. Likewise, all value lists should be considered as including intermediate values unless the context is contrary.

The present invention comprises a flexible, reusable form for forming voids in a concrete slab. The formwork conveniently includes ribs which are used to assist a user in removing the formwork from the concrete once it has set. The form further includes a docking station for engaging a tool by which the form may be more easily removed from a set concrete slab, and a system for aligning the form in successive floors of a multi-story building. Accordingly, in some embodiments, the present invention provides a formwork assembly for forming voids in a volume of concrete, the formwork assembly comprising: a cylinder comprising a body, a first end and a second end; a flange located at one end of the cylinder and substantially surrounding the periphery of the cylinder and configured to allow a user to secure the formwork assembly in a desired position on the erected structure to contain a volume of concrete; a cap configured to substantially seal an end of the cylinder opposite the end of the cylinder where the flange is located; at least one rib positioned along and extending above a surface of the cylinder, wherein the at least one rib has a first end and a second end, and wherein the at least one rib is configured to assist a user in releasing the form assembly from the fully cured concrete such that the volume of concrete will retain a desired shape once the form assembly is removed; a base configured to receive a tool that is manipulable by a user to remove the formwork assembly from the concrete volume. The cap is configured to substantially seal an end of the cylinder opposite the end of the cylinder where the flange is located; at least one rib positioned along and extending above a surface of the cylinder, wherein the at least one rib has a first end and a second end, and wherein the at least one rib is configured to assist a user in releasing the form assembly from the fully cured concrete such that the volume of concrete will retain a desired shape once the form assembly is removed; a base configured to receive a tool that is manipulable by a user to remove the formwork assembly from the concrete volume. The cap is configured to substantially seal an end of the cylinder opposite the end of the cylinder where the flange is located; at least one rib positioned along and extending above a surface of the cylinder, wherein the at least one rib has a first end and a second end, and wherein the at least one rib is configured to assist a user in releasing the form assembly from the fully cured concrete such that the volume of concrete will retain a desired shape once the form assembly is removed; a base configured to receive a tool that is manipulable by a user to remove the formwork assembly from the concrete volume. And extending over a body surface of the cylinder, wherein the at least one rib has a first end and a second end, and wherein the at least one rib is configured to assist a user in releasing the stencil assembly from the container. A volume of concrete sufficiently cured such that upon removal of the formwork assembly, the volume of concrete will retain the desired shape; a base configured to receive a tool that is manipulable by a user to remove the formwork assembly from the concrete volume. And extending over a body surface of the cylinder, wherein the at least one rib has a first end and a second end, and wherein the at least one rib is configured to assist a user in releasing the stencil assembly from the container. A volume of concrete sufficiently cured such that upon removal of the formwork assembly, the volume of concrete will retain the desired shape; a base configured to receive a tool that is manipulable by a user to remove the formwork assembly from the concrete volume. The at least one rib is configured to assist a user in releasing the formwork assembly from the fully cured concrete such that the volume of concrete will retain a desired shape once the formwork assembly is removed; a base configured to receive a tool that is manipulable by a user to remove the formwork assembly from the concrete volume. The at least one rib is configured to assist a user in releasing the formwork assembly from the fully cured concrete such that the volume of concrete will retain a desired shape once the formwork assembly is removed; a base configured to receive a tool that is manipulable by a user to remove the formwork assembly from the concrete volume.

In some embodiments, a first end of the at least one rib extends outwardly from a side of the cylinder and a second end of the at least one rib is substantially flush with a surface of the cylinder.

In some embodiments, the first end and the second end of at least one rib are radially separated by an arc of less than 180 °. In some embodiments, the first end and the second end of at least one rib are radially separated by an arc of less than 120 °. In some embodiments, the first end and the second end of at least one rib are radially separated by an arc of less than 90 °. In some embodiments, the first end and the second end of at least one rib are radially separated by an arc of about 90 °.

There is also provided a method of forming voids in a volume of concrete, the method comprising: providing a formwork assembly for forming voids in a volume of concrete, the formwork assembly comprising: a cylinder comprising a body, a first cylinder end and a second end; a flange located at an end of the cylinder and substantially surrounding a periphery of the cylinder and configured to allow a user to secure the formwork assembly in a desired position on the erected structure to receive a volume of concrete; a cap configured to substantially seal an end of the cylinder opposite the end of the cylinder where the flange is located; at least one rib positioned along and extending above a surface of the cylinder, wherein the at least one rib has a first end and a second end, the at least one rib configured to assist a user in releasing the formwork assembly from the fully cured concrete such that the volume of concrete will retain a desired shape upon removal of the formwork assembly; a docking station configured to receive a tool manipulable by a user to remove a formwork assembly from a volume of concrete; placing the formwork assembly in a location where a void is to be formed in the concrete volume; securing the formwork assembly to the erected structure to accommodate a mass of concrete; placing a cover on an end of the cylinder opposite to the end where the flange is located; pouring concrete; allowing the concrete to solidify to a certain extent to retain its desired shape; removing the cover from the cylinder; accessing the docking station using a tool configured to assist a user in rotating the template assembly within the shaped void; the formwork assembly is rotated through an arc sufficient to free the formwork assembly from a void formed in the concrete volume.

In some embodiments of the method, rotating the stencil assembly includes rotating the stencil assembly to move the first end of the at least one rib from the first position to the second position. In some embodiments of the method, the first position is a position of the first end of the at least one rib when the formwork assembly is positioned prior to casting the concrete volume, and the second position is a position occupied by the formwork assembly after casting the concrete. The formwork assembly is rotated to release the formwork assembly from the set concrete.

In some embodiments of the method, moving the template assembly from the first position to the second position comprises rotating the template assembly through an angle of less than 180 °. In some embodiments of the method, moving the template assembly from the first position to the second position comprises rotating the template assembly through an angle of less than 120 °. In some embodiments of the method, moving the template assembly from the first position to the second position comprises rotating the template assembly through an angle of less than 90 °. In some embodiments of the method, moving the template assembly from the first position to the second position comprises rotating the template assembly through an angle of about 90 °. In some embodiments of the method of the present invention,

in some embodiments, the method further comprises placing the alignment tool in a position within the volume of concrete previously occupied by the cover. In some embodiments, the method further comprises using the alignment tool to indicate a location for placing a formwork assembly for forming a void in a volume of concrete to be subsequently poured. In some embodiments of the method, the alignment tool comprises an optical reticle configured to project an image of the illumination source onto a location for placement of a formwork assembly for forming a void in a volume of concrete to be subsequently poured. In some embodiments of the method, the illumination source is a laser beam.

Drawings

Fig. 1A and 1B are side cross-sectional views of an embodiment of a concrete sleeve form according to the present disclosure. A drawing;

FIG. 1C is a top view of the embodiment shown in FIG. 1A;

fig. 2 is a side cross-sectional view of an embodiment of a concrete sleeve form in place within a concrete slab according to the present disclosure;

FIG. 3 is a side cross-sectional view of a space in a concrete slab formed by the sleeve of the present disclosure and illustrating the use of an alignment reticle;

fig. 4 is a side cross-sectional view of a space in a concrete slab formed from the sleeve of the present disclosure, and an example of placing rebar and forming board to allow filling of the space once the component is placed therein.

Detailed Description

The present disclosure describes a system and method for forming an opening in a concrete slab through which service components such as electrical wires, plumbing conduits, and the like pass. Once the concrete has hardened sufficiently to retain its shape, the system can remove the formwork from the concrete slab. In addition, the table is reusable. The form is shaped such that it forms one or more recesses in the wall of a hole formed in a concrete slab. These recesses are adapted to receive a reinforcing material, such as a metal reinforcing bar.

As shown in fig. 1. Referring to fig. 1A, in one embodiment, a concrete form assembly 10 includes a cylindrical body 20 and a base 30. The cylinders define the shape and size of the space to be formed in the concrete slab by the formwork 10. The stencil assembly also includes a removable cover 40. The assembly further comprises a tool dock 50, the tool dock 50 being configured to receive a tool for removing the formwork assembly from the concrete slab once the concrete has cured sufficiently to retain its shape.

Preferably, the cylindrical portion of the concrete formwork assembly may be made of a flexible material in order to improve the ease of removal once the placed concrete slab has sufficiently cured. Many materials are suitable for making the cylinder, including various plastics, such as polyethylene and polypropylene. Other similar suitable materials will be known to those skilled in the art. The removable cover may also be made of various flexible materials including plastic or natural or synthetic rubber materials.

In one embodiment, the base 30 includes a flange, as shown in the top view of the assembly in FIG. 1. 1B. The base may further include holes 60, and the holes 60 may be used to secure the formwork assembly to a concrete formwork, whether made of wood or metal, using screws, wires or other forms of fasteners.

The sidewall of the cylindrical portion of the die plate assembly may also include ribs 70. In one example, as shown in FIG. 1C for a better understanding, ribs 70 extend outwardly from the cylinder. In addition, in a preferred embodiment, the ribs are tapered such that they taper from a maximum distance from the cylinder at one location until the ribs are flush with the cylinder. In one aspect, the taper is such that the ribs become flush in a direction of about 90 ° around the circumference of the cylinder. When concrete is poured, the ribs are used for forming conical grooves in a concrete slab. These grooves have other uses, as described below.

In use, the formwork assembly may be secured to a surface of a concrete formwork 35, such as a wooden formwork or a metal formwork for defining the shape of a concrete slab to be poured. As mentioned above, the base 30 may be secured to the formwork 35 so as to hold it in place during the operation of pouring the concrete slab. As shown in fig. 1. As shown in fig. 2, the formwork assembly when in place will create a void 100 from which concrete 110 is removed. The cover 40 has two functions. First, during the casting process, the cover 40 prevents concrete from accidentally entering the void 100 formed by the formwork assembly. Second, the cover 40 includes a cover flange 41 that forms a wider void at the top of the assembly, which in turn forms a recess 130 in the finished concrete slab at the top of the void 100, as shown in fig. 2. 3. The recess serves as a mount for the alignment tool 140.

With respect to the alignment tool, in multi-story buildings such as high-rise buildings and skyscrapers, service components such as wires and pipes are generally provided to extend upward (or downward) through a plurality of floors. A challenge in placing forms to perforate concrete panels for running such service assemblies is that it is often necessary to align a void in one concrete panel with a void to be formed in the next panel (e.g., in an upper floor). Such alignment is difficult to achieve with the naked eye and therefore will typically be done by measuring the position of the voids in the slab and then attempting to create the same position for use in places such as walls by measuring against structures on the upper floor (e.g. formwork).

The present template assembly may form a ring 130 at one end of the gap 100 to facilitate placement of an alignment tool 140. In one embodiment, the alignment tool includes a reticle through which an illumination source, such as a laser, may be illuminated to illuminate spots on the concrete form above the void formed on the ground. By aiming the laser in a substantially vertical direction, the laser will illuminate a spot directly above the center line of the void on which the reticle is placed. Thus, the location of the next location of the void on the concrete slab may be accurately predetermined in a single step. Positioning other template assemblies in this manner is not only more accurate than estimating the appropriate position of the next template assembly to be placed, but is also much faster than having to measure the position relative to other structures using conventional methods (e.g., using tape measures).

One type where a concrete slab has been poured and the concrete has cured sufficiently to enable it to retain its shape, the present invention provides that the formwork assembly can be removed from the slab and reused. In some embodiments, removal of the template assembly is accomplished by engaging the tool base 50. A tool is used that can be reversibly fixed to the assembly. Once engaged, the tool is then rotated, causing the formwork assembly to rotate within the void created by its placement in the now formed concrete slab. When the assembly is rotated, the rotational force will cause the tapered rib structure to apply a force to the groove it forms in the concrete. This force will cause the walls of the cylindrical portion of the die plate assembly to deform inwardly. Once the form assembly has been rotated approximately 90 ° from its previous position, the widest part of the rib will be flush with the walls of the void in the concrete, at which point the form assembly can be removed and the void it forms pulled out. Although this example refers to a 90 ° rotation, this is one possible configuration of the ribs of the cylinder sidewall. The rib may be formed to taper over an area around the cylinder side wall greater or less than 90 deg. and still function in the manner described. The maximum rib width and the angular measure between the position where the rib is flush with the rest of the surface of the sidewall are therefore not considered a limiting aspect of the invention. For example, in some cases, the rib structure may taper over an arc of 30 °, 45 °, or 60 °. In some cases, the ribs preferably taper over an arc of 90 ° or 120 ° or 150 °. Theoretically, any arc less than 180 ° would allow the rib to function. At a 90 angle to the cylinder sidewall and still function as described above. The maximum rib width and the angular measure between the position where the rib is flush with the rest of the surface of the sidewall are therefore not considered a limiting aspect of the invention. For example, in some cases, the rib structure may taper over an arc of 30 °, 45 °, or 60 °. In some cases, the ribs preferably taper over an arc of 90 ° or 120 ° or 150 °. Theoretically, any arc less than 180 ° would allow the rib to function. At a 90 angle to the cylinder sidewall and still function as described above. The maximum rib width and the angular measure between the position where the rib is flush with the rest of the surface of the sidewall are therefore not considered a limiting aspect of the invention. For example, in some cases, the rib structure may taper over an arc of 30 °, 45 °, or 60 °. In some cases, the ribs preferably taper over an arc of 90 ° or 120 ° or 150 °. Theoretically, any arc less than 180 ° would allow the rib to function. In some cases, the rib structure may taper over an arc of 30 ° or 45 ° or 60 °. In some cases, the ribs preferably taper over an arc of 90 ° or 120 ° or 150 °. Theoretically, any arc less than 180 ° would allow the rib to function. In some cases, the rib structure may taper over an arc of 30 ° or 45 ° or 60 °. In some cases, the ribs preferably taper over an arc of 90 ° or 120 ° or 150 °. Theoretically, any arc less than 180 ° would allow the rib to function.

Although not necessary to the basic concept of forming voids in concrete slabs. The inclusion of ribs in the formwork assembly provides additional advantages not present in prior art concrete formwork sleeves. As shown in fig. 1. As shown in fig. 4, the presence of the notches or grooves 120 formed by the ribs within the concrete slab provides a location for placement of the reinforcing elements 200. . Once all electrical and mechanical service components have been installed in the void area of the panel, these reinforcing elements may provide additional strength to the panel in the event that the void is refilled with concrete. This then allows other materials to be poured into the void so that the concrete slab now forms a continuous barrier. This is a desirable feature to maintain physical separation between spaces on separate floors. For example, without a device to fill the remaining void, water would flow freely from the upper layer through the void down to the lower layer, such as in the case of a water leak.

Claims

1. A concrete form system, the form assembly comprising: a cylinder comprising a body, a first end and a second end; a flange located at an end of the cylinder and substantially surrounding a periphery of the cylinder and configured to allow a user to secure the formwork assembly in a desired position on the erected structure to receive a volume of concrete; a cap configured to substantially seal an end of the cylinder opposite the end of the cylinder where the flange is located; at least one rib positioned along and extending above a surface of the cylinder, wherein the at least one rib has a first end and a second end, and wherein the at least one rib is configured to assist a user in releasing the form assembly from the fully cured concrete such that the volume of concrete will retain a desired shape once the form assembly is removed; a base configured to receive a tool that is manipulable by a user to remove the formwork assembly from the concrete volume.

2. The die plate assembly of claim 1, wherein a first end of the at least one rib extends laterally outward from the body of the cylinder and a second end of the at least one rib is substantially flush with a surface of the body of the cylinder.

3. The die plate assembly of claim 2, wherein said first and second ends of said at least one rib are radially separated by an arc of less than 180 °.

4. The die plate assembly of claim 2, wherein said first and second ends of said at least one rib are radially spaced apart by an arc of less than 120 °.

5. The die plate assembly of claim 2, wherein said first and second ends of said at least one rib are radially spaced apart by an arc of less than 90 °.

6. The die plate assembly of claim 2, wherein said first and second ends of said at least one rib are radially separated by an arc of about 90 °.

7. A method of forming voids in a volume of concrete, the method comprising: there is provided a formwork assembly for forming voids in a volume of concrete, the formwork assembly comprising: a cylinder comprising a body, a first end and a second end; a flange located at an end of the cylinder and substantially surrounding a periphery of the cylinder and configured to allow a user to secure the formwork assembly in a desired position on the erected structure to receive a volume of concrete; a cap configured to substantially seal an end of the cylinder opposite the end of the cylinder where the flange is located; at least one rib positioned along and extending above a surface of the cylinder, wherein the at least one rib has a first end and a second end, and wherein the at least one rib is configured to assist a user in releasing the form assembly from the fully cured concrete such that the volume of concrete will retain a desired shape once the form assembly is removed; a docking station configured to receive a tool manipulable by a user to remove a formwork assembly from a volume of concrete; placing the formwork assembly in a location where a void is to be formed in the concrete volume; securing the formwork assembly to the erected structure to accommodate a mass of concrete; placing a cover on an end of the cylinder opposite to the end where the flange is located; pouring concrete; allowing the concrete to solidify to a certain extent to retain its desired shape; removing the cover from the cylinder; accessing the docking station using a tool configured to assist a user in rotating the template assembly within the shaped void; and rotating the formwork assembly through an arc sufficient to release the formwork assembly from a void formed in the concrete volume.

8. The method of claim 7, wherein rotating the template assembly comprises rotating the template assembly such that the first end of the at least one rib moves from a first position to a second position.

9. The method of claim 8, wherein the first position is a position of the first end of the at least one rib when the form assembly is positioned prior to casting the concrete, and the second position is a position of the form assembly after the form assembly has been occupied, rotating the form assembly to release the form assembly from the set concrete.

10. The method of claim 9, wherein moving the template assembly from the first position to the second position comprises rotating the template assembly through an angle of less than 180 °.