JP2019526005A - Precast concrete formwork, wall system and construction method - Google Patents

Abstract

A formwork for constructing a wall system, the first precast concrete wall panel and the second precast concrete wall panel, wherein the first wall panel is positioned in a spaced relationship with the second wall panel. A hollow core defined by a first precast concrete wall panel and a second precast concrete wall panel and oppositely arranged surfaces of the first and second wall panels, wherein the core Is a connection arrangement for interconnecting a first wall panel with a second wall panel in spaced relation with a hollow core adapted to receive ready-mixed concrete, generally in the first and first A formwork comprising a connection arrangement extending in an outward direction with respect to the oppositely arranged surfaces of the two wall panels.

Description

  The present invention relates to the field of architecture, and more particularly to precast concrete formwork, wall systems, and associated methods for forming wall systems within structures.

  Any reference to prior art methods, devices, or documents should not be construed as constituting evidence or approval that they were formed, or as part of common general knowledge. Should not.

  The use of formwork interconnected to form a wall structure into which concrete can be tilted is known.

  Traditionally, concrete walls are cast using a double hull formwork. In recent years, various new systems have been developed to improve the quality of construction work.

  For example, a concrete panel of a tilt-up method is widely used. Another type of precast wall panel involves the use of a double skin wall with two reinforced concrete skins, each 50-70 mm thick. The double hulls are connected to each other via a three-dimensional truss of reinforcing bars. The gaps between the skins are filled with concrete on site to form a semi-monolithic structure.

  There is a need to provide an improved formwork and wall system that reduces the overall time required for construction and provides a higher quality finish. There is also a need to provide a modular formwork that is configured in one of many possible configurations and that allows buildings of various dimensions to be more easily constructed. Exist.

In one aspect, the invention is a formwork for building a wall system,
A first precast concrete wall panel and a second precast concrete wall panel, wherein the first wall panel is adapted to be positioned in a spaced relationship with the second wall panel. And a second precast concrete wall panel;
A hollow core defined by opposingly arranged surfaces of the first and second wall panels, the core being adapted to receive ready-mixed concrete;
A connection arrangement for interconnecting a first wall panel with a second wall panel in a spaced relationship, the connection arrangement generally being arranged oppositely of the first and second wall panels. A connection arrangement extending in an outward direction relative to the surface;
A formwork is provided.

  In some embodiments, the first and second panels each have a generally regular or irregular cross-section with a plurality of peaks separated from each other by grooves (not limited to trapezoidal, circular, square, rectangular, oval) Or a combination thereof), and during use, the top is located along oppositely arranged surfaces of the first and second panels.

  Preferably, during use, the first plurality of top portions of the first panel such that each top portion of the first panel is positioned adjacent to a corresponding top portion of the second panel to provide a connection arrangement. Are arranged in opposing relation to the second plurality of apexes.

  In certain embodiments, the formwork further comprises a spacer for positioning and retaining between the individual tops of the first and second panels during use.

  In certain embodiments, the first panel groove and the second panel corresponding groove each define a hollow core portion from the first panel so as to receive ready-mixed ready-mixed concrete therein. The first plurality of grooves are positioned in an opposing relationship with respect to the second plurality of grooves of the second panel.

  In certain embodiments, the side edge of each panel has a protrusion thickness that is preferably less than the height of one or more of the tops, and the first of the first and second panels. Protrusions that are contoured to receive one or more joiner members for interconnecting the pairs along their separate lateral edges to the second pair of the first and second panels Is provided.

  In certain embodiments, the protrusions of the first panel are spaced from the oppositely arranged protrusions of the second panel and define a cavity that receives the grout.

  In certain embodiments, the joiner member extends transversely to the top length.

  In some embodiments, the formwork includes a plurality of spaced joiner members positioned between the top and bottom of the panel, the joiner members receiving one or more reinforcing members extending in a generally upright direction. One or more individual receptacles that are aligned to each other.

  In some embodiments, the first receiving portion for each joining member is aligned to receive the reinforcing member between the opposingly arranged surfaces of the first pair of panels, and the first receiving portion for each joining member. Each joiner member has a first receiving portion and a second receiving portion such that the two receiving portions are aligned to receive a reinforcing member between oppositely arranged surfaces of the second pair of panels. A receiving portion.

  In some embodiments, the joiner member has a first structural wall formed by the first pair of panels intersecting a second imaginary plane of the second structural wall formed by the second pair of panels. , Structured to allow it to be in the first virtual plane.

  In certain embodiments, the formwork further comprises a locking member for locking the joiner member to at least one of the opposingly arranged surfaces.

  In certain embodiments, the mold further comprises an elongate cap member for positioning along oppositely arranged side edges of the first and second panels, the inner wall of the cap member and the first and second The panel protrusion defines an interior space for receiving grout or ready-mixed concrete.

  Preferably, the cap member comprises a connection arrangement for connecting the cap member to the side edges of the first and second panels.

  In some embodiments, the formwork extends from the inner surface of the cap member outwardly into a core portion for interconnecting to the cap member with the first and second panels. And the additional joiner member includes a receiving portion for receiving one or more reinforcing members extending in a generally upright direction.

  In certain embodiments, the formwork further comprises one or more additional reinforcement members extending through the core, the reinforcement members supporting the outward and preferably the first and second wall panels. It extends in a direction perpendicular to the support surface.

  In certain embodiments, the formwork further comprises a lintel member for positioning over the upper portion of the first and second panels in use, the lintel member being a lintel member on the formwork core. A connection member for connecting is further provided. An internal cavity may be provided to minimize the weight of the lintel member.

  In certain embodiments, the formwork further comprises a reinforcing bar extending along the length of the lintel member, wherein the upper portion in use includes a first plurality of reinforcing bars, and the lower portion in use Includes a second plurality of reinforcing bars.

  In another aspect, the invention is a precast concrete panel for building a formwork for a wall system in a building, the panel having a plurality of tops spaced apart from one another by grooves. Or an irregular cross-section (including but not limited to trapezoidal, circular, square, rectangular, elliptical, or combinations thereof), two of the panels being arranged facing each other at the top of each panel A precast concrete panel is provided in which the groove portions of the panel, which can be positioned in a connected configuration and arranged in opposition, define a plurality of hollow cores for receiving ready-mixed concrete therein.

In another aspect, the invention is a method of building a wall in a structure comprising
Positioning the first precast concrete wall panel in a spaced relationship from the second precast concrete wall panel, wherein the first wall panel is adapted to be positioned in a spaced relationship with the second wall panel; Steps,
Connecting the first wall panel to the second wall panel and maintaining the first and second wall panels in a spaced relationship, wherein the connection arrangement generally comprises the first and second wall panels; Extending outwardly with respect to the oppositely arranged surfaces; and
Decanting the ready-mixed concrete into a core defined by opposingly arranged surfaces of the first and second wall panels;
Providing a method.

  In certain embodiments, at least one of the wall panels comprises a cavity or channel that extends in a generally upright direction along the panel to accommodate one or more supply lines during use. .

  In another aspect, the present invention provides a wall system comprising a formwork according to the first aspect and ready-mixed concrete that is tilted into the core, thereby forming a wall system.

  In certain embodiments, the wall panel is adapted to receive a facade panel and / or an inner wall panel.

  In some embodiments, the formwork includes a first plurality of wall panels comprising one or more of the first wall panels and a second comprising one or more of the second wall panels. The first plurality of wall panels are spaced apart from the second plurality of wall panels.

  In certain embodiments, the formwork further comprises an anchoring member for anchoring the first and / or second plurality of wall panels to the support surface.

  Preferred features, embodiments, and variations of the invention can be determined from the following detailed description, which provides those skilled in the art with sufficient information to practice the invention. The detailed description is considered not to limit in any way the scope of the summary of the immediately preceding invention. The detailed description will refer to the several drawings as follows.

FIG. 1A illustrates a precast concrete panel 180 used in a formwork for building a wall system in a building according to an embodiment of the present invention. FIG. 1B is a cross-sectional view of precast concrete panel 180. FIG. 2A illustrates a formwork system 190 for constructing a wall in a building according to an embodiment of the present invention, according to a first formwork embodiment of the present invention. FIG. 2B illustrates a formwork system 190 'for constructing a wall in a building according to an embodiment of the present invention, according to a second formwork embodiment of the present invention. FIG. 2C illustrates a cross-sectional side view of the formwork system 190. FIG. 2D illustrates a cross-sectional top view of the formwork system 190. FIG. 2E illustrates a cross-sectional top view of the formwork system 190 '. 2F through 2H illustrate perspective views of the outer surface of the mold 190 or 190 'to which a new suspended scaffolding system is attached. 2F through 2H illustrate perspective views of the outer surface of the mold 190 or 190 'to which a new suspended scaffolding system is attached. 2F through 2H illustrate perspective views of the outer surface of the mold 190 or 190 'to which a new suspended scaffolding system is attached. FIG. 3A illustrates a continuous wall 500 that is constructed using a plurality of formwork systems 190. FIG. 3B illustrates a continuous wall 500 'constructed using a plurality of formwork systems 190'. FIG. 4A is a cross-sectional view of a T-shaped wall structure 280 comprising formwork systems 190 and 190 '. FIG. 4B is a cross-sectional view of another T-shaped wall structure 280 ′ with a formwork system 190. FIG. 4C is a cross-sectional view of another T-shaped wall structure 280 ″ with formwork systems 190 and 190 ′. FIG. 4D is a cross-sectional view of another T-shaped wall structure 280 ″ ″ with formwork system 190. FIG. 5A is a cross-sectional view of an L-shaped wall structure 290 with a formwork system 190. FIG. 5B is a cross-sectional view of another L-shaped wall structure 290 comprising formwork systems 190 and 190 '. FIG. 5C is a cross-sectional view of an L-shaped wall structure 290 ″ with a formwork system 190 ′. FIG. 6A is a perspective view of a lintel member 200, according to an embodiment. FIG. 6B is a cross-sectional view of the lintel member 200. FIG. 7A is a perspective view of a lintel member 200 'according to an embodiment. FIG. 7B is a cross-sectional view of the lintel member 200 ′. FIG. 8A is a perspective view of a cap member 210, according to an embodiment. FIG. 8B is a cross-sectional view of the cap member 210. FIG. 8C is a cross-sectional view of the cap member 210 in use. FIG. 9A is a perspective view of a cap member 210 'according to an embodiment. FIG. 9B is a cross-sectional view of the cap member 210 '. FIG. 9C is a cross-sectional view of the cap member 210 'during use. FIG. 10A is a perspective view of a window sill unit 220 according to another embodiment. FIG. 10B is a cross-sectional view of the window base unit 220.

  Referring to FIG. 1, a first embodiment of the present invention provides a single-hull precast concrete panel 180 having a corrugated or trapezoidal cross section. The precast panel 180 includes a plurality of tops 181 that are separated or spaced apart by cavities or grooves 182 that extend along the generally vertical direction of the panel 180 on the inner surface. The outer surface of the panel 180 also includes a discontinuous furling channel 187 and forms a cavity 186 in the horizontal direction. Cavity furling channel 187 and cavity 186 are provided to store service lines such as electrical conduit 183 and piping supply lines such as hot water pipe 184 and cold water pipe 185. The horizontal cavity 186 also allows conduits and pipes to be positioned horizontally when required.

  Precast wall panel 180 is also adapted to receive an external gypsum panel 189 on the outwardly facing surface of precast panel 180. The cavity formed by the furling channel 187 aids in the installation of pipes and electrical conduits while making each panel 180 lighter. The single hull precast concrete panel 180 may have a width that varies between 200 mm and 2,600 mm at 50 mm intervals. In relation to the height, the panels are 1,100 mm (to be used under the window), 2,400 mm, 2,700 mm, 3,000 mm, 3,200 mm, 3,600 mm, and 4,000 mm, etc. It can be provided within a height range. The thickness of the single hull precast concrete panel 180 in some embodiments may be limited to 75 mm, and the panel body contains a reinforcing mesh 188 within the concrete body of the panel 180 (as shown in FIG. 1B). May be.

  2A and 2B illustrate formwork systems 190 and 190 'that can be assembled by using at least two of the panels 180 as described in the preceding paragraph. Formwork systems 190 and 190 'each comprise two spaced precast concrete panels 180A and 180B. The hollow core is defined by opposingly arranged surfaces of the first and second wall panels 180A and 180B, and the core is adapted to receive ready-mixed concrete. As described in the previous section, the opposingly arranged surfaces of panels 180A and 180B each include a top 181 that provides a connection arrangement for interconnecting panels 180A and 180B during use. The first plurality of tops 181A of the first panel are positioned such that the tops 181A of the first panel 180A are each positioned adjacent to the corresponding tops 181B of the second panel and provide a connection arrangement, The second plurality of apexes 181B are arranged to face each other. Similarly, the first panel 180A groove portion and the second panel 180A corresponding groove portion each define a hollow core portion and receive the ready-mixed concrete poured into the hollow core. The first plurality of grooves 182A of the panel 180A are positioned in an opposing relationship with respect to the second plurality of grooves 182B of the second panel 180B.

  Formwork system 190 (shown in FIG. 2A) uses spacer members 195 to position the tops 181A and 181A from oppositely arranged panels 180A and 180B in a spaced configuration. The spacer member 195 generally extends along a direction perpendicular to the inner surfaces of the first and second precast panels 180A and 180B.

  Formwork system 190 '(shown in FIG. 2B) does not use any spacer members. As a result, the tops 181A and 181B arranged opposite to each other may be directly fastened to each other. In the mold 190 ', the tops 181A and 181B are directly connected to each other via surface connections 198 using structural adhesives. The wall unit 190 also contains 6 mm thick slots 197 arranged along the sidewalls of each groove 182 that allows for separation of vertical cavity cores using steel plates, PVC plates, or cement plates. .

  Referring to FIGS. 2D and 2E, the side edges of each of the panels 180A and 180B are such that the thickness of the protrusion 191 is less than the height of one or more of the tops 181 and the first and second Accommodating one or more joiner members 196 for interconnecting a first pair of panels 180A and 180B to a second pair of the first and second panels 180 along their respective lateral edges. And a projecting portion 191 that is contoured.

  As shown in FIGS. 3A and 3B, during a typical installation, a plurality of formwork systems 190 or 190 ′ may be interconnected or joined together to form a continuous wall in the building. . Referring to FIGS. 3A and 3B, a plurality of joiner members 196 are positioned between the top and bottom of a pair of precast panels arranged in opposition. Referring to FIG. 3A, for example, three pairs of precast panels are arranged in a side-by-side manner to form wall sections within the structure. A first pair of precast panels 180A and 180B arranged opposite each other is interconnected to a second pair of precast panels 180P and 180Q arranged oppositely by utilizing a plurality of joint members 196. . Each joiner member 196 further includes one or more receiving openings 196A. An opening 196A for each joiner member that interconnects two adjacent pairs of precast panels 180A and 180B is aligned to receive a reinforcing member 193 extending in a generally upright direction. In addition, a vertically oriented reinforcement bar 193 extending through the core 192 is also provided. Similarly, locking ladder shaped reinforcement bars 193 and 196 'are used to connect adjacent wall units 190'. Additional reinforcing bars 193 may also be positioned in the cores of panels 180A and 180B arranged oppositely.

  2F and 2H illustrate perspective views of the outer surface of the molds 190 and 190 'to which the new scaffold system 198 can be attached. In order to facilitate safe access to the outer surface of the wall unit, the wall unit is equipped with a cast-in ferrule 197. A T-shaped cantilever steel beam 1000 with an end connection plate 1001 is connected to the wall via a bolt connection 1002. The other side of the T-shaped cantilever contains an upwardly circular, square, or rectangular hollow section 1003 that acts as a handrail. A traditional aluminum, steel, or wood plank unit 1004 is then installed over the T-shaped cantilever to form a safe path for the construction worker. These can be connected to the support of the T-beam by screws, bolts or pins.

  FIGS. 3A and 3B illustrate the use of a spaced pair of precast wall panels 180 (FIG. 3A) with an internal gap and a spaced pair of precast wall panels 180 (FIG. 3B) without an internal gap. Figure 2 illustrates a cross-sectional view of formwork systems 190 and 190 '. The size and number of splice members 196 for interconnecting the various pairs of wall panels 180 depends on the structural integrity of the external load bearing walls. In both walls 190 and 190 ′, the edge cavity cores (cores defined by protrusions 191 located along the lateral edges of each panel 180 interconnected in a side-by-side arrangement) are grout filled in the field. obtain. The number, size, and arrangement of the vertical reinforcement bars 194 depends on the structural validity of the wall to withstand the applied load. Thus, the inner hollow core 192 can be grouted or kept empty depending on the load bearing requirements.

  With reference to FIGS. 4A-4D and FIGS. 5A-5C, typical T-shaped and L-shaped wall formations can be constructed using formwork systems 190 and 190 '. Joiner members of various configurations, such as joiner units 280, 280 ', 280 ", 280'", 290, 290 ', and 290' can be two, three, or four adjacent wall units Can be positioned at various angles including, but not limited to, 90 degrees. All such joiner units have a wet connection (in-place concrete / grouting) and a T-shaped reinforcing connector (281) or L-shaped reinforcing connector (291) that can be located around a vertical bar (283) located in the center of the connector. ) May be provided. The number and size of L-shaped and T-shaped connectors (281 or 291) and the number of reinforcing bars (such as 283) depend on the amount of load applied on the wall formation. When formwork system 190 is utilized, small to medium sized reinforcement cages 282 or 292 may be used in the presence of internal gaps between precast concrete panels. In order to keep the reinforcing connector 281 or 291 in proper horizontal alignment, a locking arrangement in the form of a metal or PVC locking portion 284 is used to provide a margin for the precast panel used in the formwork system 190 or 190 '. May be used on the inner surface.

  6A, 6B, 7A, and 7B are lintels 200 and 200 configured to be positioned over open areas (doors and windows) in walls that are built using formwork systems 190 and 190 ′. A cross-sectional view and a perspective view of 'are illustrated. The lintels 200 and 200 'may span between cap members in the form of termination units 210 and 210' (shown in FIGS. 8 and 9) above the top of the formwork system 190 or 190 '. The lintels 200 and 200 'comprise a positive reinforcement bar 201 in the lower part of the lintel and a negative reinforcement bar 202 located along the upper part of the lintel 200 and 200'. A shear ligature 203 is also provided along the length of the lintels 200 and 200 ′ to connect the top reinforcement bar 202 to the bottom reinforcement bar 201. To minimize the weight of the lintels 200 and 200 ', an internal cavity may be provided. To prevent any out-of-plane movement, shear connectors 205 may also be provided at the ends of the lintels 200 and 200 '. The shear connector 205 can be located in the cavity of the wall units 190 and 190 'and can be secured in place using grout or concrete. The lintel unit 200 ′ also includes an upward extension 206 containing a reinforcing mesh 204 and having a thickness of less than 60 mm. The upward extending portion 206 functions as an edge formwork and can prevent the ready-mixed concrete from escaping from the slab.

  With reference to FIGS. 8A-8C and FIGS. 9A-9C, embodiments of elongate cap members 210 and 210 'are illustrated. The elongate cap members 210 and 210 ′ are adapted to be positioned along oppositely arranged side edges of the first and second panels 180A and 180B, and the inner wall of the cap member and the sides of the panels 180A and 180B. The edge defines an internal space for receiving grout or ready-mixed concrete. Cap members 210 and 210 'function as a drive form and may be positioned in place using a forming connection with precast concrete panels 180A and 180B. These connections are made using dry shear connectors 213 and 214 and wet connections in the vertical cavity of the wall via a shear connector 211 and a vertical reinforcement bar 212 that restrain the shear connector 211. These connectors are provided for engaging the connecting edges of precast panels used in the formwork systems 190 and 190 '. Connectors 213 and 214 form connecting grooves (or convex edges) for receiving corresponding convex edge (or groove) portions provided along the edges of wall units 190 and 190 '.

  FIGS. 10A and 10B illustrate another embodiment of a cap member in the form of a window sill plate 220. A window sill plate member 220 is provided along the bottom of the window opening. The window sill plate 220 also functions as a driving formwork and is positioned in place with the formation of a wet shear connection in the core / cavity of the wall constructed using the formwork systems 190 and 190 ′. . These connections can be made using the shear connector 222. The window sill plate member 220 also contains a slot 223 at the lower end along its outer edge to eliminate water ingress at the interface between the window sill unit and the wall unit.

  Applicants understand that the adoption of a factory-based system in which all parts of the formwork are pre-machined off-site at the factory is understood to be very skilled and better trained by factory workers. It is thought to reduce the potential risk of workers. As a result, Applicants believe that employing a formwork as described herein can minimize / eliminate most of the risks associated with site construction.

In at least some embodiments, the adoption of the wall system provided herein is expected to likely provide the following advantages:
• Increase construction speed.
・ Achieve high quality finish.
・ Improve the safety of workers working on buildings.
・ Reduce construction costs.
・ Reduce the volume of concrete work on site.
Reduce the amount of reinforcement bars that need to be installed and arranged in the field.
・ Improve the quality of concrete structures.
• Reduces the risk to third parties due to construction activities, as the building will be built within a short period of time (compared to the current construction time).
-Eliminate the use of a complete scaffold system, as the suspended scaffold platform can be utilized directly in the wall system.
・ Achieve high quality soundproofing.
• Can be combined with other insulation to achieve a high level of energy rating.

The use of formwork as described herein may provide the following non-limiting advantages.
• Potentially reduces the final cost of concrete buildings, as the combined use of the formwork with this system is likely to be reduced and possibly eliminated.
A minimum strut is required over the long span, but no strut is required over the short to medium span. As a result, the worker can work easily and safely on a floor without obstacles (posts).
Eliminates the use of complete scaffold systems since temporary scaffold platforms can be directly utilized in the present invention.
• Assembling the formwork as described in this document is relatively easy and requires less effort from field workers.
The system is modular and can be used to build structures with different shapes.

  Any of the precast panels are constructed using reinforced concrete, or prestressed concrete, or any other suitable material whose material strength can satisfy the loading scenario (with or without any reinforced bars) It will be understood that this may be done.

  In compliance with the statute, the invention has been described in language more or less specific to structural or methodological features. The terms “comprises” and variations thereof such as “comrising” and “comprised of” are used throughout in a comprehensive sense, without excluding any additional features. It will be understood that the means described herein are in a preferred form embodying the invention and that the invention is not limited to the specific features shown or described. Accordingly, the invention is claimed in any form or modification within the proper scope of the appended claims as appropriately construed by those skilled in the art.

  Throughout the specification and claims (if present), unless otherwise required by context, the term “substantially” or “about” is understood not to be limited to the value of the scope modified by the term. It will be.

  Any embodiment of the present invention is intended to be illustrative only and not intended to be limiting. Accordingly, it should be understood that various other changes and modifications can be made to any described embodiment without departing from the spirit and scope of the invention.

Claims (21)

A formwork for constructing a wall system, the formwork being
A first precast concrete wall panel and a second precast concrete wall panel, wherein the first wall panel is adapted to be positioned in a spaced relationship with the second wall panel. A wall panel and a second precast concrete wall panel;
A hollow core defined by opposingly arranged surfaces of said first and second wall panels, said core being adapted to receive ready-mixed concrete;
A connection arrangement for interconnecting the first wall panel with the second wall panel in the spaced relationship, wherein the connection arrangement is generally opposite the first and second wall panels. A connection arrangement extending in an outward direction with respect to the arranged surfaces;
A formwork comprising.   Each of the first and second panels includes a plurality of tops spaced from each other by a groove, and during use, the tops are along oppositely arranged surfaces of the first and second panels. The mold according to claim 1, wherein   During use, each of the first panel tops is positioned adjacent to a corresponding top of the second panel to provide the connection arrangement. The formwork of claim 2, wherein tops are arranged in opposing relation to the second plurality of tops.   A formwork according to any one of the preceding claims, further comprising a spacer for positioning and retaining between separate tops of the first and second panels during use.   The first panel from the first panel such that the groove portion of the first panel and the corresponding groove portion of the second panel each define a hollow core portion and receive ready-mixed concrete in it. 6. The formwork according to claim 2, wherein the plurality of groove portions are positioned in an opposing relationship with respect to the second plurality of groove portions of the second panel.   The side edges of each panel have a protrusion thickness that is preferably less than the height of one or more of the tops, so that the first pair of the first and second panels is in the first pair. A profiled projection for accommodating one or more joiner members for interconnection to a second pair of the first and second panels along separate lateral edges of the first and second panels. Item 6. The mold according to any one of Items 2 to 5.   The formwork of claim 6, wherein the protrusions of the first panel are spaced from the oppositely arranged protrusions of the second panel and define a cavity for receiving grout or concrete.   The formwork according to claim 6, wherein the joiner member extends in a lateral direction with respect to a length of the top portion.   A plurality of spaced joiner members positioned between the top and bottom of the panel, the joiner members being aligned to receive one or more reinforcing members extending in a generally upright direction; The mold according to claim 8, further comprising the above individual receiving portions.   The first receiving portion for each joiner member is aligned to receive a reinforcing member between opposingly arranged surfaces of the first pair of panels, and the second receiving portion for each joiner member Each joiner member has a first receiving portion and a second receiving portion such that the receiving portion is aligned to receive a reinforcing member between oppositely arranged surfaces of the second pair of panels. The formwork of Claim 9 provided with a part.   In the joiner member, a first structural wall formed by the first pair of panels intersects a second virtual plane of a second structural wall formed by the second pair of panels. 11. A formwork as claimed in any one of claims 6 to 10, structured to allow it to lie in a virtual plane.   The formwork according to any one of claims 6 to 11, further comprising a locking member for locking the joiner member to at least one of the opposingly arranged surfaces.   An elongated cap member for positioning along opposing side edges of the first and second panels, the inner wall of the cap member and the protrusions of the first and second panels, A formwork according to any one of the preceding claims, which defines an internal space for receiving grout or ready-mixed concrete.   The formwork of claim 13, wherein the cap member comprises a connection arrangement for connecting the cap member to a lateral edge of the first and second panels.   An additional joiner member extending outwardly from the inner surface of the cap member into the core portion for interconnection to the cap member with the first and second panels; 15. A formwork as claimed in any one of claims 13 or 14, wherein the additional joiner member comprises a receptacle for receiving one or more reinforcing members extending in a generally upright direction.   The formwork further comprises one or more additional reinforcing members extending through the core, the reinforcing members supporting outwardly, preferably the first and second wall panels. The formwork according to claim 1, which extends in a direction perpendicular to the surface.   Further comprising a lintel member for positioning above the upper part of the first and second panels in use, the lintel member being a connection for connecting the lintel member to the core of the formwork The formwork according to claim 1, further comprising a member.   And further comprising a reinforcing bar extending along the length of the lintel member, wherein the upper portion in use includes a first plurality of reinforcing bars, and the lower portion in use is a second plurality of reinforcements. 18. A formwork as claimed in claim 17, comprising a bar.   The formwork of any one of the preceding claims, further comprising a scaffold anchor arrangement for removably anchoring a scaffold to at least one of the precast panels.   A precast concrete panel for building a formwork for a wall system in a building, the panel comprising a plurality of tops separated from each other by a groove, two of the panels facing each other Precast concrete panels that can be arranged and positioned in a connected configuration at the top of each panel, wherein the oppositely arranged panel groove portions define a plurality of hollow cores for receiving ready-mixed concrete therein . A method of building a wall in a building, the method comprising:
Positioning a first precast concrete wall panel in a spaced relationship from a second precast concrete wall panel, wherein the first wall panel is adapted to be positioned in a spaced relationship with the second wall panel. Step,
Connecting the first wall panel to the second wall panel and maintaining the first and second wall panels in the spaced relationship, the connection arrangement generally comprising the first and second Extending outwardly with respect to the oppositely arranged surfaces of the two wall panels; and
Tilting green concrete into a core defined by opposingly arranged surfaces of the first and second wall panels.

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