SG189664A1

SG189664A1 - Structure of building that is free of formwork removal

Info

Publication number: SG189664A1
Application number: SG2012079216A
Authority: SG
Inventors: Yen-Ching Hung
Original assignee: Yen-Ching Hung
Priority date: 2011-10-28
Filing date: 2012-10-24
Publication date: 2013-05-31
Also published as: CN103088942A; JP3180817U; MY168167A; US20130104492A1; CN203066232U; TWM428973U; HK1170110A2

Abstract

22S I RUCTURE OF BUILDING THAT IS FREE OF FORMWORK OF THE DISCLOSURE5A structure of building that is free of formwork removal includes a surface panel, two grid bodies, and connectable connection bars. The surface panel has spillage sections. The grid bodies are spaced from each other and define therebetween a grouting space. One of the grid bodies is fixed to the10 surface panel. Each of the grid bodies includes longitudinal strengthening rebars and lateral strengthening rebars, which extend longitudinally and laterally to interconnect each other at nodal points. The longitudinal or lateral strengthening rebars of grid body are arranged to alternate with respect to those of the other grid body. Each connection bar is set in a tortuous form15 connecting between the grid bodies so that each nodal point is connected to two of the nodal points of another grid body that are closest to the nodal point and each nodal point is connected by at least two differently-oriented connection bars.

Description

l

STRUCTURE OF BUILDING THAT IS FREE OF FORMWORK

REMOVAL

(a) Technical Field of the Invention

The present invention generally relates to a structure of a building, and more particularly to a structure of building that requires no removal of formwork. (b) Description of the Prior Art

One of the structures of building that are commonly adopted is a reinforced concrete structure. To construct such a structure, reinforcing bars are processed in advance off the construction site to meet the desired specification and are then transported to the construction site to be handled wit heavy machinery. However, formworks cannot be processed in advance off the site and can neither be handled with heavy machinery on the site and thus must be handled with a great of labor. Various defects of construction may be caused due to errors made by the operators who might be of inconsistent quality, such as increased damage rate of form material in removing the forms, form bursting, and skewness of form, all these leading to undesired extension of construction time.

In addition, in the construction of a drainage channel, a drainage channel having an inside diameter of 80 centimeters may require the removal of earth

; about twice the width of the drainage channel.

Thereafter, outside channel walls must be made, reinforcing bars be assembled, and wall forms of two sides of the channel be set up, followed by grouting, waiting for the concrete to reach a predetermined strength, removing forms, making channel cover forms, assembling channel cover reinforcing bars, grouting, and finally earth being deposited back.

This is an extended period of time, during which the construction site would become a great water pit if it rains heavily.

The construction site will then be dangerous to pedestrians and the construction time will be further extended.

SUMMARY OF THE INVENTION

The object of the present invention is to provide a structure of building that requires no removal of formwork, which comprises a surface panel, two grid bodies, and a plurality of bendable connection bars.

The present invention provides a structure of building that is free of removal of formwork, which comprises one surface panel, two grid bodies, and a plurality of bendable connection bars.

The surface panel comprises a plurality of spillage sections.

The two grid bodies are spaced from each other to define a grouting space. One ofthe grid bodies is fixed to the surface panels. Each of the grid bodies comprises a plurality of parallel longitudinal strengthening rebars and a plurality of parallel lateral strengthening rebars. The longitudinal strengthening rebars and the lateral strengthening rebars extend in longitudinal and lateral directions to intersect each other for forming a nodal point at each interconnection. The longitudinal strengthening rebars of one of the grid bodies are located alternating with respect to the longitudinal strengthening rebars of another one of the grid bodies.

Each of the bendable connection bars is set in a tortuous form connecting between the two grid bodies, whereby the connection bars are made to connect in such a way that each of the nodal point is connected to two of the nodal points of the other grid body that are closest to said nodal point and each of the nodal points being connected by at least two different-oriented connection bars.

Further, the lateral strengthening rebars of one of the grid bodies may be arranged alternating with respect to the lateral strengthening rebars of another one of the grid bodies, whether the longitudinal strengthening rebars of one of the grid bodies are arranged alternating with respect to the longitudinal strengthening rebars of another one of the grid bodies. On alternatively, the longitudinal strengthening rebars of one of the grid bodies are arranged alternating with respect to the longitudinal strengthening rebars of another one of the grid bodies and the lateral strengthening rebars of one of the grid bodies are arranged alternating with respect to the lateral strengthening rebars of another one of the grid bodies.

The efficacy of the present invention is that a surface panel is provided to

I5 replace a wood form and is used in combination with grid bodies and connection bars to allow a structure of building to be free of form removal and no expense of time to set up the wood formwork.

The foregoing objectives and summary provide only a brief introduction to the present invention. To fully appreciate these and other objects of the present invention as well as the invention itself, all of which will become apparent to those skilled in the art, the following detailed description of the invention and the claims should be read in conjunction with the accompanying drawings.

Throughout the specification and drawings identical reference numerals refer to identical or similar parts. 5 Many other advantages and features of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is shown by way of illustrative example.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a cross-sectional view showing a structure of building free of formwork removal according to a first preferred embodiment of the present invention.

FIG 2 is a partial enlarged view showing a surface panel and a grid body of the first preferred embodiment.

FIG. 3 is a view similar to FIG 2.

FIG 4 is a cross-sectional view of the first preferred embodiment according to the present invention.

FIG 5 1s a cross-sectional view of the first preferred embodiment according to the present invention after grouting,

FIG 6 1s a cross-sectional view showing a second preferred embodiment of the present invention.

FIG 7 is a cross-sectional view showing the second preferred embodiment of the present invention after grouting.

FIG. 8 1s a cross-sectional view showing a third preferred embodiment of the present invention.

FIG 9 is a cross-sectional view showing a fourth preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The following descriptions are exemplary embodiments only, and are not intended to limit the scope, applicability or configuration of the invention in any way. Rather, the following description provides a convenient illustration for implementing exemplary embodiments of the invention. Various changes to the described embodiments may be made in the function and arrangement of the elements described without departing from the scope of the invention as set forth in the appended claims.

The technical contents, features, and advantages of the present invention will be apparent from the following description of four preferred embodiments, with reference to the attached drawings,

Referring to FIGS. 1 and 2, a structure of building that requires no removal of formwork according to a first preferred embodiment of the present invention is applicable to a wall comprising primary rebars 2. However, it is noted that using primary rebars 2 or not is generally dependent on the desired strength of the wall. The first preferred embodiment is a dual-panel structure unit 11, which comprises two surface panels 3 that comprise a plurality of spillage sections 31, two grid bodies 4, and a plurality of bendable connection bars 6. The grid bodies 4 are spaced from each other to define therebetween

; a grouting space 5 in such a way that the primary rebars 2 are located in the grouting space 5.

The two grid bodies 4 are respectively attached to the surface panels 3.

Each of the grid bodies 4 comprises a plurality of parallel longitudinal strengthening rebars 41 and a plurality of parallel lateral strengthening rebars 42, wherein the longitudinal strengthening rebars 41 and the lateral strengthening rebars 42 extend in longitudinal and lateral directions to interconnect to each other to form a plurality of nodal points 43 and spot welding is applied to the longitudinal strengthening rebar 41 and the lateral strengthening rebar 42 at each of the nodal points 43 so that the longitudinal strengthening rebars 41 of one of the grid bodies 4 are located alternating with respect to the longitudinal strengthening rebars 41 of another one of the grid bodies 4 and the lateral strengthening rebars 42 of the one of the grid bodies 4 arc located alternating with respect to the lateral strengthening rebars 42 of said another one of the grid bodies 4. Specifically, the longitudinal strengthening rebars 41 and the lateral strengthening rebars 42 are reinforcing bars of 0.6cm diameter and the spacing distance between the longitudinal strengthening rebars 41 of each of the grid bodies 4 is around 10 centimetersand the spacing distance between the lateral strengthening rebars 42 is also around 10 centimeters.

Fach of the connection bars 6 is set in tortuous form connecting between the two grid bodies 4 in such a way that each of the nodal points 43 is connected to two of the nodal points 43 of the other grid body 4 that are adjacent to said each of the nodal points 43. Each of the connection bars 6 is wrapped around the nodal points 43 and is then fixed to the nodal point 43.

Also, two differently oriented connection bars 6 are fixed to each nodal point 43. The orientations are illustrated in FIG 4 to point to different inclination directions for entangling. Two differently-oriented connection bars 6 are set to fix, in a symmetric manner, to the lateral strengthening rebar 42, so that the dual-panel structure unit 11 is in the form of a girder structure. Specifically, the connection bars 6 are reinforcing bars of 0.3cm diameter.

Each of the surface panels 3 comprises a panel body 32, a plurality of nodal point openings 33, a plurality of longitudinal fixing channels 34, and a plurality of lateral fixing channels 35. Each nodal point opening 33 is formed in the panel body 32 to correspond in position to each nodal point 43 to receive the extension of the connection bar 6 for wrapping around the nodal point 43. Each of the spillage sections 31 comprises a spillage hole 311 extending through the panel body 32, a suspension tab 312 extending from the panel body 32 in a direction away from the grouting space 5, and a blocking tab 313 perpendicularly extending from the suspension tab 312 to oppose the spillage hole 311. It is noted here that for simplifying the drawings and the description, the number of the spillage sections 31 shown in the drawings is for illustration only. In an actual application, there are sixteen spillage sections provided in each area delimited by the longitudinal strengthening rebars 41 and the lateral strengthening rebars 42. In other words, there are sixteen spillage sections 31 present in every ten square centimeter. Each of the longitudinal fixing channels 34 is formed by recessing the panel body 32 in a direction toward the grouting space 5 to receive and retain one of the longitudinal strengthening rebars 41 therein. Each of the lateral fixing channels 35 has a lateral opening 351 and a plurality of fixing walls 352.

Each fixing wall 352 has two ends respectively connected to two side of the lateral opening 351 to receive and retain one of the lateral strengthening rebars 42 therein. The surface panels 3 can be made of recycled thin steel plates, empty cans, or oil barrels.

Referring to FIGS. 3 and 4, the orientation of each of the connection bars 6 will be further described. In two connection bars 6 that are fixed to each nodal point 43, one of the connection bars 6 is welded to the longitudinal strengthening rebar 41 and the other one of the connection bars 6 is welded to the lateral strengthening rebar 42 and is also welded to the connection bar 6 of the longitudinal strengthening rebar 41 and as shown in the cross-sectional

J view of FIG 4, is set in a tortuous form wrapping back and forth between the two grid bodies 4. The connection bars 6 welded to the lateral strengthening rebars 42 is illustrated in the cross-sectional view of FIG | wraps back and forth between the two grid bodies 4.

Referring to FIG 5, the first preferred embodiment does not to manufacture on site and can be pre-fabricated in advance off the construction site and then transported to the construction site to be installed with heavy machinery. And then, directly grouting can be made without setting up formwork. During the grouting, cement mortar spills over the spillage holes 311 (see FIG 2) can be leveled with the blocking tabs 313 are a reference surface to achieve an effect of overall surface finishing. This way saves more time than the known techniques for there is no need to wait for the curing of the concrete before surface finishing can be made. Further, all the components become a part of the main structure after the operation is completed.

Referring to FIG. 6, a second preferred embodiment of the present invention is applicable to a drainage channel, which comprises two spaced dual-panel structure units 11 with the two surface panels 3 that are located at the inner side is smaller in height than the two surface panels 3 located at the outerside. The second preferred embodiment further comprises a set of primary rebars 2 having a U-shaped cross-section and a layer of plastic sheet 7.

The primary rebars 2 comprise two parallel vertical segments 21 and a horizontal segment 22 connecting between the two vertical segments 21.

The two dual-panel structure units 11 are respectively mounted to the vertical segments 21 in such a way that the vertical segments 21 are located in the grouting spaces 5. The plastic sheet 7 wraps outside the two surface panels 3 that are located at the outer side and the horizontal segment 22. Similar to the first preferred embodiment, the second preferred embodiment can be pre-fabricated in advance off the construction site. It is noted that since no wood form is used in the construction and no falsework that is used in the known techniques is needed inside and outside the drainage channel, and since it only needs supports 8 supporting between the two dual-panel structure units 11, there is no need to dig out earth that is twice of the drainage channel as that occurring in making a 80cm wide channel with the known techniques. The second preferred embodiment of the present invention only needs to make an 8-10cm additional space to allow the second preferred embodiment to be disposed in the channel and after being fixed, sand and water are simultaneously filled into the additional space to compact the sand.

Referring to FIG 7, at the same time of grouting of the second preferred embodiment, dry cement powder is spread toward the two inner-side surface panels 3 so that the mortar spilling over the two inner-side surface panels 3 can be fast dried to effect surface finishing. The mortar spilling over the two outer-side surface panels 3, due to be covered by the plastic sheet 7, may also naturally effect surface finishing to provide dual protection layers. Further, it is an alternative solution that no spillage section 31 is provided on the two outer-side surface panels 3. In other words, the two outer-side surface panels 3 do not have the spillage sections 31.

Referring to FIG 8, a third preferred embodiment of the present invention is applicable to a floor slab, which comprises a single-panel structure unit 12.

The components of the single-panel structure unit 12 are substantially similar to those of the dual-panel structure unit 11 with a difference in that the dual-panel structure unit 11 comprises two surface panels 3, while the single-panel structure unit 12 has only one surface panel 3. In other words, one of the grid bodies 4 is not fixed to a surface panel 3. In an actual application of the third preferred embodiment, the grid body 4 that is not fixed to a surface panel 3 is arranged in such a way that the reinforcing bars that are originally used to construct the floor slab are used to form the grid body 4.

Referring to FIG: 9, a forth preferred embodiment of the present invention is applicable to a column that comprises primary rebars 2 and stirrups 9, wherein the primary rebars 2 and the stirrups 9 constitute a structure having a rectangular cross-section. It is noted here that to simplify the drawing of FIG 9, some of the components are omitted from the drawing, any details of which may refer to FIG 1. The further preferred embodiment comprises four single-panel structure units 12 surrounding the primary rebars 2andthesticrups 9. Each of the single-panel structure units [2 has a grid body 4 that is not fixed to a surface panel 3 and is coupled to one surface of the rectangular structure constituted by the primary rebars 2 and the stirrups 9.

The grid body 4 that is fixed to the surface panel 3 has a width greater than that of the grid body 4 that is not fixed to a surface panel 3. Similarly, the single-panel structure unit 12 is also applicable to beams, Besides the difference in reinforcing bar arrangement between a column and a beam, the only difference is that a beam has a three-surface structure of U-shaped cross-section, while a column has a four-surface structure of rectangular cross-section. Thus, a beam only needs three single-panel structure units 12.

Every embodiment of the present invention is constructed according to construction regulations. In the first preferred embodiment, since the longitudinal strengthening rebars 41 and the lateral strengthening rebars 42 of the grid bodies 4 are arranged very close, even though for certain cases of the known techniques where at least two layers of primary rebars 2 are needed, with the application of the first preferred embodiment, the grid bodies 4 may provide additional strength to the wall so that one layer of the primary rebars 2 can be omitted without affecting the overall strength. In other words, the material that is used in the known techniques to constitute one layer of primary rebars 2 is not converted into the material for the grid bodies 4.

In summary, the present invention allows the construction of walls, drainage channels, beams and columns, and floor slabs to be done without using wood formwork that are traditionally used, so that no wood form worker isneeded. Compared to the conventional way, the labor used is greatly reduced. In addition, most of the building structure can be done in advance offthe construction site. This, together with the omission of traditional wood formwork operation, including setting up wood forms, removing wood forms, and surface finishing done after waiting for curing of concrete, greatly shortens the construction time.

It will be understood that each of the elements described above, or two or more together may also find a useful application in other types of methods differing from the type described above.

While certain novel features of this invention have been shown and described and are pointed out in the annexed claim, it is not intended to be limited to the details above, since it will be understood that various omissions, modifications, substitutions and changes in the forms and details of the device illustrated and in its operation can be made by those skilled in the art without departing in any way from the spirit of the present invention.

Claims

[ CLAIM:

1. A structure of building that is free of removal of formwork, comprising: one surface panel, which comprises a plurality of spillage sections; two grid bodies, which are spaced from each other to define a grouting space, one of the grid bodies being fixed to the surface panels, each of the grid bodies comprising a plurality of parallel longitudinal strengthening rebars and a plurality of parallel lateral strengthening rebars, the longitudinal strengthening rebars and the lateral strengthening rebars extending in longitudinal and lateral directions to intersect each other for forming a nodal point at each interconnection, the longitudinal strengthening rebars of one of the grid bodies being located alternating with respect to the longitudinal strengthening rebars of another one of the grid bodies; and a plurality of bendable connection bars, each of which is set in a tortuous form connecting between the two grid bodies, whereby the connection bars are made to connect in such a way that each of the nodal point is connected to two of the nodal points of the other grid body that are closest to said nodal point and each of the nodal points being connected by at least two different-oriented connection bars.

2. The structure of building that is free of removal of formwork, comprising: one surface panel, which comprises a plurality of spillage sections; two grid bodies, which are spaced from each other to define a grouting space, one of the grid bodies being fixed to the surface panels, each of the grid bodies comprising a plurality of parallel longitudinal strengthening rebars and a plurality of parallel lateral strengthening rebars, the longitudinal strengthening rebars and the lateral strengthening rebars extending in longitudinal and lateral directions to intersect each other for forming a nodal point at each interconnection, the lateral strengthening rebars of one of the grid bodies being located alternating with respect to the lateral strengthening rebars of another one of the grid bodies; and a plurality of bendable connection bars, each of which is set in a tortuous form connecting between the two grid bodies, whereby the connection bars are made to connect in such a way that each of the nodal point is connected to two of the nodal points of the other grid body that are closest to said nodal point and each of the nodal points being connected by at least two different-oriented connection bars.

3. The structure of building that is free of removal of formwork as claimed in Claim 1 further comprising an additional surface panel, whereby the grid body that is not fixed to said one surface panel is fixed to said additional surface panel.

4. The structure of building that is free of removal of formwork as claimed in Claim 2 further comprising an additional surface panel, whereby the grid body that is not fixed to said one surface panel is fixed to said additional surface panel.

5. The structure of building that is free of removal of formwork as claimed in Claim 1, wherein the surface panel comprises a panel body, each of the spillage sections comprising a spillage hole extending through the panel body, a suspension tab extending from the panel body in a direction away from the grouting space, and a blocking tab perpendicularly extending from the suspension tab to oppose the spillage hole.

6. The structure of building that is free of removal of formwork as claimed in Claim 2, wherein each of the surface panels comprises a panel body, each of the spillage sections comprising a spillage hole extending through the panel body, a suspension tab extending from the panel body in a direction away from the grouting space, and a blocking tab perpendicularly extending from the suspension tab to oppose the spillage hole.

7. The structure of building that is free of removal of formwork as claimed in Claim 1, wherein the surface panel comprises a plurality of longitudinal fixing channels that is formed by recessing the panel body and a plurality of lateral fixing channels formed on the panel body, each of the longitudinal fixing channels receiving and retaining one of the longitudinal strengthening rebars therein, each of the lateral fixing channels having a lateral opening and a plurality of fixing walls respectively connected to opposite sides of the lateral opening, each of the lateral fixing channels receiving and retaining one of the lateral strengthening rebars therein,

8. The structure of building that is free of removal of formwork as claimed in Claim 2, wherein each of the surface panels comprises a plurality of longitudinal fixing channels that is formed by recessing the panel body and a plurality of lateral fixing channels formed on the panel body, each of the longitudinal fixing channels receiving and retaining one of the longitudinal strengthening rebars therein, cach of the lateral fixing channels having a lateral opening and a plurality of fixing walls respectively connected to opposite sides of the lateral opening, each of the lateral fixing channels receiving and retaining one of the lateral strengthening rebars therein.

9. The structure of building that is free of removal of formwork as claimed in Claim 1, wherein the lateral strengthening rebars of one of the grid bodies are arranged alternating with respect to the lateral strengthening rebars of another one of the grid bodies.

10. The structure of building that is free of removal of formwork as claimed in Claim 1, wherein the two connection bars that are connected to each of the nodal points are connected in a symmetric manner to the lateral strengthening rebars.

11. The structure of building that is free of removal of formwork as claimed in Claim 2, wherein the two connection bars that are connected to each of the nodal points are connected in a symmetric manner to the lateral strengthening rebars.