TWI843396B - Method for manufacturing parapet wall - Google Patents

Abstract

The present disclosure relates to a method of manufacturing a papapet wall. The method comprises the following steps: (a) pre-embedding a first rebar in a floor and a part of the first rebar protruding from the floor; (b) disposing a precast plate structure on a predetermined position near an edge of the floor and above the floor such that the precast plate structure is substantially perpendicular to the floor, wherein the precast plate structure comprises a concrete base and a plurality of metal supports protruding from the concrete portion; (c) inserting the portion of the first rebar to the plurality of metal supports of the precast plate structure; and (d) disposing a plurality of stiffening rebars and connecting them to the plurality of metal supports of the precast plate structure.

Description

How to make a parapet

The present disclosure relates to a method for manufacturing a parapet, and in particular to a method for manufacturing a parapet using a precast concrete slab.

The goal of the construction and construction industry has long been to quickly build high-quality buildings. Among the many construction methods, the precast method has been successfully applied to various construction and construction projects due to its advantages such as excellent quality, safe and rapid construction, and economical and reasonable construction costs. The precast method uses standardized operating processes and modular molds in the precast factory or around the construction site to manufacture steel structures, such as steel cages, build templates and pour concrete, and quickly mass-produce high-precision and high-quality uniformity columns, beams, plates and other structural components. Subsequently, the completed structural components are assembled on site through precise transportation management and assembly operations. In this way, the workload on the construction site can be reduced to a minimum, reducing manpower and construction time, thereby shortening the construction period. In addition, this construction method can also reduce or avoid scaffolding construction, greatly improving construction safety.

It is known that the construction of parapets in buildings requires the installation of formwork on both the inside and outside of the parapet, and the concrete mortar is poured between the formwork. However, the formwork on the outside of the parapet is not easy to install, so the construction quality of the outside of the parapet is not easy to control. In view of this, a new parapet manufacturing method using precast concrete slabs has been developed to further improve the existing parapet construction, which is long-awaited by the construction and construction industry.

Therefore, to achieve the above-mentioned purpose, one embodiment of the present disclosure is related to a method for manufacturing a parapet, which comprises the following steps: (a) pre-embedding a first steel bar in a floor, a portion of the first steel bar protruding from the floor; (b) setting a pre-cast plate structure at a predetermined position, the predetermined position being adjacent to an edge of the floor and located above the floor, the pre-cast plate structure being substantially perpendicular to the floor, the pre-cast plate structure comprising a concrete base and a plurality of metal brackets extending from the concrete base; (c) inserting the portion of the first steel bar into the plurality of metal brackets of the pre-cast plate structure; and (d) setting a plurality of reinforcing steel bars and connecting and fixing them to the plurality of metal brackets of the pre-cast plate structure.

10: First steel bar

11: Part 1

12: Part 2

20: Floor

30: Pre-cast plate structure

30': Pre-cast plate structure

31: First page

31': First side

32: Second side

32': Second side

33: Second steel bar

33': Second steel bar

34: The third steel bar

34': Third steel bar

35: Bump

35': Bump

36: Gasket

37:Metal connection part

37':Metal connection part

40: Reinforced steel bars

40': Reinforced steel bars

41: The fourth steel bar

41': Fourth steel bar

42: Fifth steel bar

42': Fifth steel bar

43: The sixth steel bar

43': Sixth steel bar

50: First template

51: Inside

60: Support rod

61: First end

62: Second end

71: First connecting piece

72: Second connecting piece

73: Third connecting piece

81: First fixing member

82: Second fixing member

83: Third fixing member

371: Part 1

371': Part 1

372: Part 2

372': Part 2

421': Part 1

422': Part 2

423': Part 3

711: First page

712: Second side

721: First page

722: Second side

731: Part 1

732: Part 2

B: Base

B': base

M:Metal bracket

M':Metal bracket

S1: First Space

S1': First Space

S2': Second Space

L1: First distance

The following figures are for illustrative purposes only and are not intended to limit the scope of this disclosure in any way:

Figures 1 to 7 show schematic diagrams of the parapet at different stages of manufacturing according to the first embodiment of the present invention.

Figure 2A is a partial enlarged view of point A in Figure 2.

Figure 3A and Figure 3B are partial enlarged views of point A and point B in Figure 3, respectively.

Figures 8 to 14 show schematic diagrams of the parapet at different stages of manufacturing according to the second embodiment of the present invention.

Figure 9A is a partial enlarged view of point A in Figure 9.

Figure 10A and Figure 10B are partial enlarged views of point B and point C in Figure 10, respectively.

In order to better understand the features, content and advantages of this creation and the effects it can achieve, this creation is described in detail as follows with accompanying drawings and in the form of an embodiment. The drawings used therein are only for illustration and auxiliary description purposes, so the proportions and configurations of the attached drawings should not be interpreted to limit the scope of the patent application for this creation.

Please refer to Figures 1 to 7, which show schematic diagrams of making a parapet at different stages according to the first embodiment of the present invention. The method for making a parapet according to the first embodiment of the present invention includes the following steps (a)-(f):

Step (a), as shown in FIG. 1 , pre-embed the first steel bar 10 in the floor 20 so that a portion of the first steel bar 10 protrudes from the floor 20. The first steel bar 10 is generally L-shaped, and includes a first portion 11 and a second portion 12 that is generally perpendicular to the first portion 11. When burying the first steel bar 10 in the floor 20, the second portion 12 of the first steel bar 10 is completely buried in the floor 20, and the first portion 11 of the first steel bar 10 at least partially protrudes from the floor 20, so as to facilitate the subsequent connection of the parapet structure to the floor 20. In some embodiments of the present invention, the first portion 11 of the first steel bar 10 protrudes from the floor 20 by about 50%-80% of its total length. However, the above ratio is not intended to limit the present invention, and the actual ratio of each case can be adjusted according to the actual needs of the case.

Step (b) is to place the pre-cast plate structure 30 at a predetermined position as shown in FIG. 2 , which is adjacent to the left edge of the floor 20 and located above the floor 20. In some embodiments of the present invention, before placing the pre-cast plate structure 30 at the predetermined position, at least one gasket 36 is first placed at the predetermined position of the floor 20 to support the bottom of the pre-cast plate structure 30. The gasket 36 is placed to adjust the height of the pre-cast plate structure 30. When placing multiple adjacent pre-cast plate structures 30, different numbers and/or thicknesses of gaskets 36 can be placed to maintain substantially the same height between different pre-cast plate structures 30. In addition, the gasket 36 can also be used to adjust the angle of the top surface of the same pre-cast plate structure 30 relative to the ground to ensure that the top surface of the pre-cast plate structure 30 remains level relative to the ground.

As shown in FIG2 , the precast plate structure 30 includes a concrete base B and a plurality of metal brackets M extending from the concrete base. The concrete base B of the precast plate structure 30 has a first surface 31 and a second surface 32 opposite to the first surface 31. Each of the plurality of metal brackets M of the precast plate structure 30 has a plurality of second steel bars 33 in a continuous bending shape, and the plurality of second steel bars 33 are at least partially exposed from the first surface 31. The continuous bending shape of the second steel bars 33 is similar to a wave shape to form a plurality of wave crest areas and a plurality of wave trough areas, wherein the wave trough area is buried in the concrete base, and the wave crest area is exposed outside the concrete base, and can be used for overlapping with other steel bar structures. For example, before or after the precast plate structure 30 is set at a predetermined position, a plurality of third steel bars 34 are inserted and fixed in a plurality of second steel bars 33 along a direction roughly perpendicular to the floor 20 (i.e., the Y-axis direction in FIG. 2 ) to further enhance the structural strength of the precast plate structure 30. As shown in FIG. 2 , the third steel bar 34 is inserted along a plurality of wave crest regions of the second steel bar 33 and connected and fixed to the top position of the wave crest region of the second steel bar 33. The connection between the second steel bar 33 and the third steel bar 34 can be fixed by welding or wire tying.

When the pre-cast plate structure 30 is set at a predetermined position, the pre-cast plate structure 30 is substantially perpendicular to the floor plate 20. As shown in FIG. 2 , the first steel bar 10 is inserted into the crest area of the plurality of second steel bars 33 of the plurality of metal brackets M of the pre-cast plate structure 30 with the first portion 11.

As shown in FIG. 2A , after the pre-cast plate structure 30 is set at a predetermined position, the third connecting member 73 can be set at the inner corner formed by the pre-cast plate structure 30 and the floor plate 20 to further fix the pre-cast plate structure 30 to prevent slipping. The third connecting member 73 is a generally L-shaped sheet structure, which includes a first portion 731 and a second portion 732 that is generally perpendicular to the first portion 731. The first portion 731 of the third connecting member 73 abuts against the floor plate 20, and the second portion 732 of the third connecting member 73 abuts against the metal connecting portion 37 at the bottom corner of the pre-cast plate structure 30. The third fixing member 83 is inserted through the first portion 731 of the third connecting member 73 to the floor plate 20, and the second portion 732 of the third connecting member 73 is connected and fixed to the metal connecting portion 37 at the bottom corner of the pre-cast plate structure 30. In one embodiment of the present invention, the third fixing member 83 can be a screw or an expansion screw, and the second portion 732 of the third connecting member 73 is fixed to the metal connecting portion 37 of the pre-cast plate structure 30 by welding. In FIG2A , the metal connecting portion 37 disposed at the bottom corner of the pre-cast plate structure 30 is a generally L-shaped sheet structure, which includes a first portion 371 and a second portion 372 substantially perpendicular to the first portion 371, so as to be fixed to one side of the corner of the pre-cast plate structure 30 and the other side adjacent thereto. The first portion 371 of the metal connecting portion 37 abuts against the gasket 36, and the second portion 372 of the metal connecting portion 37 abuts against the second portion 732 of the third connecting member 73. The metal connection part 37 can be used not only to support the pre-cast plate structure 30 on the gasket 36, but also to prevent the corners of the concrete base of the pre-cast plate structure 30 from being damaged due to collision.

As shown in FIG3 , the pre-cast plate structure 30 has a protrusion 35 extending from the first surface 31 of the pre-cast plate structure 30 along the X-axis direction by a first distance L1. In the embodiment shown in FIG3 , the width of the protrusion 35 (i.e., in the Z-axis direction in FIG3 ) is smaller than the width of the pre-cast plate structure 30. After the pre-cast plate structure 30 is set at a predetermined position, a support rod 60 may be further set to strengthen and stabilize the pre-cast plate structure 30 to prevent the pre-cast plate structure 30 from being skewed. FIG3A is a partial enlarged view of the A in FIG3 . As shown in FIG3A , the first connecting member 71 has a first surface 711 and a second surface 712 opposite to the first surface 711. The first surface 711 has a structure that can pivotally connect the first end 61 of the support rod 60. The second surface 712 is substantially flat and is used to abut against the outer surface of the protrusion 35 of the pre-cast plate structure 30. The first fixing member 81 is inserted through the first connecting member 71 to the protrusion 35 of the pre-cast plate structure 30 to abut and fix the second surface 712 of the first connecting member 71 against the outer surface of the protrusion 35, and pivotally connect the first end 61 of the support rod 60 to the first surface 711 of the first connecting member 71. In one embodiment of the present invention, the first end 61 of the support rod 60 is first installed on the first surface 711 of the first connecting member 71, and then the first fixing member 81 is inserted through the first connecting member 71 to the outer surface of the protrusion 35 of the pre-cast plate structure 30.

FIG3B is a partial enlarged view of the B position in FIG3 . As shown in FIG3B , the second connecting member 72 has a first surface 721 and a second surface 722 opposite to the first surface 721. The first surface 721 has a structure that can pivotally connect the second end 62 of the supporting rod 60. The second surface 722 is substantially flat and is used to abut against the floor 20. The second fixing member 82 is inserted through the second connecting member 72 to the floor 20 to abut and fix the second surface 722 of the second connecting member 72 to the floor 20, and pivotally connect the second end 62 of the supporting rod 60 to the first surface 721 of the second connecting member 72. In some embodiments of the present invention, the second end 62 of the supporting rod 60 is first installed on the first surface 721 of the second connecting member 72, and then the second fixing member 82 is inserted through the second connecting member 72 to the floor 20. In some embodiments of the present invention, the first fixing member 81 and the second fixing member 82 may be screws or expansion screws. In addition, a part of the floor 20 at the construction site may not be suitable for installing the support rod 60 due to obstruction by objects or structural restrictions. In this case, since the first end 61 and the second end 62 of the support rod 60 can be pivotally connected to the first connecting member 71 and the second connecting member 72 respectively, when installing the support rod 60, the angle between the support rod 60 and the protrusion 35 and the angle between the support rod 60 and the floor 20 can be adjusted to change the position of the first connecting member 71 fixed to the protrusion 35 of the pre-cast plate structure 30 and the position of the second connecting member 72 fixed to the floor 20. In another embodiment of the present invention, the length of the support rod 60 is designed to be adjustable to adapt to different construction environments. In other embodiments of the present invention (not shown), the first connector 71 and the second connector 72 are not provided, and the first end 61 of the support rod is directly connected and fixed to the outer surface of the protrusion 35 of the pre-cast plate 30, and the second end 62 of the support rod is directly connected and fixed to the floor plate 20.

Step (c), as shown in FIG. 4 , a plurality of reinforcing steel bars 40 are provided and connected and fixed to a plurality of metal brackets of the pre-cast plate structure 30. The plurality of reinforcing steel bars 40 include a plurality of fourth steel bars 41 and a plurality of fifth steel bars 42. First, the plurality of fourth steel bars 41 are arranged substantially parallel to each other and spaced apart in a direction substantially perpendicular to the floor plate 20 (i.e., the Y-axis direction in FIG. 4 ), and the plurality of fourth steel bars 41 are connected and fixed to at least one of the plurality of second steel bars 33 and the plurality of third steel bars 34 of the pre-cast plate structure 30. Next, a plurality of fifth steel bars 42 are arranged approximately parallel to each other and spaced apart along the horizontal extension direction of the parapet (i.e., the Z-axis direction in FIG. 4 ), and the plurality of fifth steel bars 42 are connected and fixed to the plurality of fourth steel bars 41. In one embodiment of the present invention, the connection between the fourth steel bar 41 and the second steel bar 33 or the third steel bar 34 can be fixed by welding or wire tying, and the connection between the fifth steel bar 42 and the fourth steel bar 41 can also be fixed by welding or wire tying.

In step (d), as shown in FIG. 5 , a first template 50 is disposed at an inner side of the pre-cast plate structure 30 at a first distance L1 from the first surface 31 of the pre-cast plate structure 30 so that the inner surface 51 of the first template 50 and the outer surface of the protrusion 35 are substantially in the same plane (i.e., both are at a first distance L1 from the first surface 31 of the pre-cast plate structure 30), and a first space S1 is formed between the first template 50 and the pre-cast plate structure 30. When the protrusion 35 is connected to the fixed support rod 60, the first template 50 disposed near the protrusion 35 can be divided into two templates, one template is disposed above the protrusion 35, and the other template is disposed below the protrusion 35, so that the first end 61 of the support rod 60, the first connecting member 71 and the first fixing member 81 are exposed without affecting the setting of the first template 50.

Step (e), as shown in FIG6 , concrete is poured into the first space S1 between the precast plate structure 30 and the first formwork 50 to the top of the precast plate structure 30 and the first formwork 50 so that the concrete completely covers the first steel bar 10, the second steel bar 33, the third steel bar 34, the fourth steel bar 41 and the fifth steel bar 42.

Step (f), as shown in FIG7 , after the concrete reaches initial setting, the first formwork 50 is removed, and the support rod 60, the first connecting member 71, the first fixing member 81, the second connecting member 72 and the second fixing member 82 can be further removed to form a parapet.

Please refer to Figures 8 to 14, which are schematic diagrams of making a parapet at different stages according to the second embodiment of the present invention. The method for making a parapet according to the second embodiment of the present invention includes the following steps (a') to (f'):

The steps (a'), (d') and (f') of making the parapet in the second embodiment of the present invention are substantially the same as the steps (a), (d) and (f) of the first embodiment.

Step (a'), as shown in FIG8, pre-embeds the first steel bar 10 in the floor 20 so that a portion of the first steel bar 10 protrudes from the floor 20. The first steel bar 10 is generally L-shaped, and includes a first portion 11 and a second portion 12 that is generally perpendicular to the first portion 11. When burying the first steel bar 10 in the floor 20, the second portion 12 of the first steel bar 10 is completely buried in the floor 20, and the first portion 11 of the first steel bar 10 at least partially protrudes from the floor 20, so as to facilitate the subsequent connection of the parapet structure to the floor 20. In some embodiments of the present invention, the first portion 11 of the first steel bar 10 protrudes from the floor 20 by about 50%-80% of its total length. However, the above ratio is not intended to limit the present invention, and the actual ratio of each case can be adjusted according to the actual needs of the case.

Step (b'), as shown in FIG9, sets the pre-cast plate structure 30' at a predetermined position, which is adjacent to the left edge of the floor plate 20 and located above the floor plate 20. The pre-cast plate structure 30' used in this embodiment is different from the pre-cast plate structure 30 in the first embodiment. The protrusion 35' of the pre-cast plate structure 30' is located at the top of the pre-cast plate structure 30', so that the top surface of the pre-cast plate structure 30' is roughly flush with the top surface of the protrusion 35'. The protrusion 35' extends from the first surface 31' of the pre-cast plate structure 30' along the X-axis direction by a first distance L1. In one embodiment of the present invention, the width of the protrusion 35' (i.e., in the Z-axis direction in FIG. 9 ) is smaller than the width of the pre-cast plate structure 30'.

In this embodiment, the method of setting the precast plate structure 30' at the predetermined position is roughly the same as that of the first embodiment. Before setting the precast plate structure 30' at the predetermined position, at least one gasket 36 can be set at the predetermined position of the floor plate 20 to support the bottom of the precast plate structure 30'. In this embodiment, the same gasket 36 as that of the first embodiment is used, and the method of application is roughly the same. The setting of the gasket 36 is to adjust the height of the precast plate structure 30'. When setting multiple adjacent precast plate structures 30', different numbers and/or thicknesses of gaskets 36 can be set to make the different precast plate structures 30' maintain roughly the same height. In addition, the gasket 36 can also be used to adjust the angle of the top surface of the same pre-cast plate structure 30' relative to the ground to ensure that the top surface of the pre-cast plate structure 30' remains level relative to the ground.

The precast plate structure 30' comprises a concrete base B' and a plurality of metal brackets M' extending from the concrete base. The concrete base B' of the precast plate structure 30' has a first surface 31' and a second surface 32' opposite to the first surface 31'. Each of the plurality of metal brackets M' of the precast plate structure 30' has a plurality of second steel bars 33' in a continuous bending shape, and the plurality of second steel bars 33' are at least partially exposed from the first surface 31'. The continuous bending shape of the second steel bars 33' presents a wave-like shape to form a plurality of wave crest areas and a plurality of wave trough areas, wherein the wave trough area is buried in the concrete base B', and the wave crest area is exposed outside the concrete base B', and can be used for overlapping with other steel bar structures. For example: before or after the precast plate structure 30' is set at the predetermined position, a plurality of third steel bars 34' are inserted and fixed in a plurality of second steel bars 33' in a direction roughly perpendicular to the floor 20 to further strengthen the structural strength of the precast plate structure 30'. In the embodiment shown in FIG. 9, the third steel bar 34' is inserted along a plurality of wave crest areas of the second steel bar 33' and connected and fixed to the top position of the wave crest area of the second steel bar 33'. The connection between the second steel bar 33' and the third steel bar 34' can be fixed by welding or wire tying.

When the precast plate structure 30' is set at a predetermined position, the precast plate structure 30' is substantially perpendicular to the floor plate 20. As shown in FIG9 , the first steel bar 10 is inserted into the crest region of the plurality of second steel bars 33' of the plurality of metal brackets M' of the precast plate structure 30' with the first portion 11.

As shown in FIG. 9A , after the precast plate structure 30' is set at a predetermined position, a third connecting member 73 can be set at the inner corner formed by the precast plate structure 30' and the floor plate 20 to further fix the precast plate structure 30' to prevent slippage. In this embodiment, the same third connecting member 73 and third fixing member 83 as in the first embodiment are used, and the operation method is roughly the same. The third connecting member 73 is a roughly L-shaped sheet structure, which includes a first portion 731 and a second portion 732 roughly perpendicular to the first portion 731. The first part 731 of the third connecting member 73 abuts against the floor plate 20, and the second part 732 of the third connecting member 73 abuts against the metal connecting part 37' at the bottom corner of the pre-cast plate structure 30'. The third fixing member 83 is inserted through the first part 731 of the third connecting member 73 to the floor plate 20, and the second part 732 of the third connecting member 73 is connected and fixed to the metal connecting part 37' at the bottom corner of the pre-cast plate structure 30'. In some embodiments of the present invention, the third fixing member 83 can be a screw or an expansion screw. The second part 732 of the third connecting member 73 is fixed to the metal connecting part 37' of the pre-cast plate structure 30 by welding. In FIG. 9A , the metal connection part 37' disposed at the bottom corner of the precast plate structure 30' is a roughly L-shaped sheet structure, which includes a first part 371' and a second part 372' roughly perpendicular to the first part 371', so as to be fixed to one side of the corner of the precast plate structure 30' and the other side adjacent thereto. The first part 371' of the metal connection part 37' abuts against the gasket 36, and the second part 372' of the metal connection part 37' abuts against the second part 732' of the third connecting member 73. In addition to supporting the precast plate structure 30' on the gasket 36, the metal connection part 37 can also be used to prevent the corners of the concrete base of the precast plate structure 30' from being damaged due to collision.

As shown in FIG. 10 , after the pre-cast plate structure 30 ′ is set at a predetermined position, a support rod 60 may be further set to strengthen and stabilize the pre-cast plate structure 30 ′ and prevent the pre-cast plate structure 30 from being skewed. In this embodiment, the same support rod 60, first connecting member 71, first fixing member 81, second connecting member 72 and second fixing member 82 as those in the first embodiment are used, and the operation method is also substantially the same. FIG. 10A is a partial enlarged view of point A in FIG. 10 . As shown in FIG. 10A , the first connecting member 71 has a first surface 711 and a second surface 712 opposite to the first surface 711. The first surface 711 has a structure that can pivotally connect the first end 61 of the support rod 60. The second surface 712 is substantially flat and is used to abut against the outer surface of the protrusion 35 ′ of the pre-cast plate structure 30 ′. The first fixing member 81 is inserted through the first connecting member 71 to the protrusion 35' of the pre-cast plate structure 30', so that the second surface 712 of the first connecting member 71 is fixed against the outer surface of the protrusion 35', and the first end 61 of the supporting rod 60 is pivotally connected to the first surface 711 of the first connecting member 71. In one embodiment of the present invention, the first end 61 of the supporting rod 60 is first installed on the first surface 711 of the first connecting member 71, and then the first fixing member 81 is inserted through the first connecting member 71 to the outer surface of the protrusion 35' of the pre-cast plate structure 30'.

FIG. 10B is a partial enlarged view of the B portion in FIG. 10 . As shown in FIG. 10B , the second connecting member 72 has a first surface 721 and a second surface 722 opposite to the first surface 721. The first surface 721 has a structure that can be pivotally connected to the second end 62 of the supporting rod 60. The second surface 722 is substantially flat and is used to abut against the floor plate 20. The second fixing member 82 is inserted through the second connecting member 72 to the floor plate 20 to abut and fix the second surface 722 of the second connecting member 72 against the floor plate 20, and pivotally connect the second end 62 of the supporting rod 60 to the first surface 721 of the second connecting member 72. In one embodiment of the present invention, the second end 62 of the support rod 60 is first installed on the first surface 721 of the second connecting member 72, and then the second fixing member 82 is inserted through the second connecting member 72 to the floor plate 20. In one embodiment of the present invention, the first fixing member 81 and the second fixing member 82 can be screws or expansion screws. In addition, some areas of the floor 20 at the construction site may not be suitable for installing the support rod 60 due to obstruction or structural restrictions. In this case, since the first end 61 and the second end 62 of the support rod 60 can be pivotally connected to the first connector 71 and the second connector 72 respectively, when the support rod 60 is installed, the position where the first connector 71 is fixed to the connector 35' of the pre-cast plate structure 30' and the position where the second connector 72 is fixed to the floor 20 can be changed by adjusting the angle between the support rod 60 and the protrusion 35' and the angle between the support rod 60 and the floor 20. In another embodiment of the present invention, the length of the support rod 60 is adjustable to adapt to different construction environments. In other embodiments of the present invention (not shown), the first connector 71 and the second connector 72 are not provided. During construction, the first end 61 of the support rod is directly connected and fixed to the outer surface of the protrusion 35' of the pre-cast plate 30', and the second end 62 of the support rod is directly connected and fixed to the floor plate 20.

In step (c'), as shown in FIG. 11, a plurality of reinforcing steel bars 40' are provided and connected and fixed to a plurality of metal brackets of the precast plate structure 30'. The plurality of reinforcing steel bars 40' include a plurality of fourth steel bars 41' and a plurality of fifth steel bars 42'. First, the plurality of fourth steel bars 41' are arranged approximately parallel to each other and spaced apart in a direction approximately perpendicular to the floor plate 20 (i.e., the Y-axis direction in FIG. 11), and the plurality of fourth steel bars 41' are connected and fixed to at least one of the plurality of second steel bars 33' and the plurality of third steel bars 34' of the precast plate structure 30'. Next, a plurality of fifth steel bars 42' are arranged substantially parallel to each other and spaced apart along the horizontal extension direction of the parapet (i.e., the Z-axis direction in FIG. 11), and the plurality of fifth steel bars 42' are connected and fixed to the plurality of fourth steel bars 41'. In one embodiment of the present invention, the connection between the fourth steel bar 41' and the second steel bar 33' or the third steel bar 34 is fixed by welding or wire tying. The connection between the fifth steel bar 42' and the fourth steel bar 41' is fixed by welding or wire tying. In addition, in this embodiment, each of the plurality of fifth steel bars 42' has a top. When the plurality of fifth steel bars 42' are connected and fixed to the plurality of fourth steel bars 41', the top of the fifth steel bar 42' is located above the pre-cast plate structure 30'. The top has a first portion 421', a second portion 422' and a third portion 423'. The first portion 421' and the third portion 423' extend along the Y-axis direction. The second portion 422' connects the first portion 421' and the third portion 423' along the X-axis direction. Fillets are formed at the connection between the second portion 422' and the first portion 421' and at the connection between the second portion 422' and the third portion 423'.

Next, the plurality of sixth steel bars 43' are arranged roughly in parallel and connected to at least one of the first part 421', the second part 422' and the third part 423' of each of the plurality of fifth steel bars 42'. In the embodiment shown in FIG. 11, at least two of the plurality of sixth steel bars 43' are connected to the connection between the second part 422' and the first part 421' and the connection between the second part 422' and the third part 423' of the fifth steel bar 42'. In one embodiment of the present invention, the connection between the sixth steel bar 43' and the fifth steel bar 42' is fixed by welding or wire tying.

Step (d'), as shown in FIG. 12, a first template 50 is disposed at a position inside the pre-cast plate structure 30', at a first distance L1 from the first surface 31' of the pre-cast plate structure 30', so that the inner surface of the first template 50 and the outer surface of the protrusion 35' are substantially located in the same plane (that is, both are at a first distance L1 from the first surface 31' of the pre-cast plate structure 30'), and a first space S1' is formed between the first template 50 and the pre-cast plate structure 30'. In this embodiment, the same first template 50 as in the first embodiment is used. When the protrusion 35' is connected to the fixed support rod 60, the first template 50 disposed near the protrusion 35' can be divided into two templates, one template is disposed above the protrusion 35', and the other template is disposed below the protrusion 35', so that the first end 61 of the support rod 60, the first connecting member 71 and the first fixing member 81 are exposed.

In step (e'), as shown in FIG. 13, concrete grouting is performed in the first space S1' between the precast plate structure 30' and the first template 50 and the second space S2' occupied by the top of the fifth steel bar 42', so that the concrete completely covers the first steel bar 10, the second steel bar 33', the third steel bar 34', the fourth steel bar 41', the fifth steel bar 42' and the sixth steel bar 43'. In one embodiment of the present invention, before the second space S2' is grouted with concrete, a second template (not shown) may be further arranged outside the second surface 32' of the precast plate structure 30', so that the top of the fifth steel bar 42' is located between the first template 50 and the second template. In another embodiment of the present invention, other panels, such as sandwich panels, are arranged on the outer side of the second surface 32' of the precast panel structure 30', and a second space S2' is formed between the panel and the first formwork 50 for concrete grouting.

Step (f'), as shown in Figure 14, after the concrete reaches initial setting, the first formwork 50 is removed, and the support rod 60, the first connecting member 71, the first fixing member 81, the second connecting member 72 and the second fixing member 82 can be removed to form a parapet.

The term "a" or "an" in this article is used to describe the elements and components of this invention. This term is only for the convenience of description and to give the basic concept of this invention. This description should be understood to include one or at least one, and unless otherwise clearly indicated, the singular also includes the plural. When used with the word "including" in the scope of the patent application, the term "a" can mean one or more than one. In addition, the term "or" in this article means "and/or".

Unless otherwise specified, spatial descriptions such as "above", "below", "upward", "left", "right", "downward", "body", "base", "vertical", "horizontal", "side", "higher", "lower", "upper", "above", "below", etc. are indicated with respect to the directions shown in the figures. It should be understood that the spatial descriptions used herein are for illustrative purposes only, and the actual implementation of the structures described herein can be spatially configured in any relative direction, and this limitation does not change the advantages of the disclosed embodiments. For example, in the description of some embodiments, providing an element "on" another element can cover the situation where the previous element is directly on the latter element (for example, in physical contact with the latter element) and the situation where one or more intervening elements are located between the previous element and the latter element.

As used herein, the terms "substantially", "substantial", "substantial" and "approximately" are used to describe and take into account minor variations. When used in conjunction with an event or circumstance, these terms may refer to both situations where the event or circumstance definitely occurred and situations where the event or circumstance closely approximates to occurring.

The implementation examples described above are only for illustrating the technical ideas and features of this creation. Their purpose is to enable people familiar with this technology to understand the content of this creation and implement it accordingly. They cannot be used to limit the patent scope of this creation. Equal changes or modifications made according to the spirit revealed by this creation should still be covered by the patent scope of this creation.

10: First steel bar

11: Part 1

12: Part 2

20: Floor

30: Pre-cast plate structure

31: First page

32: Second side

33: Second steel bar

34: The third steel bar

35: Bump

36: Gasket

40: Reinforced steel bars

41: The fourth steel bar

42: Fifth steel bar

S1: First Space

L1: First distance

Claims (10)

A method for manufacturing a parapet comprises the following steps: (a) pre-embedding a first steel bar in a floor, wherein a portion of the first steel bar protrudes from the floor; (b) before setting a pre-cast plate structure having a protrusion at a predetermined position, first setting a gasket at the predetermined position to adjust the height of the pre-cast plate structure, and then setting the pre-cast plate structure at the predetermined position, wherein the predetermined position is adjacent to an edge of the floor and located above the floor, and the pre-cast plate structure is approximately perpendicular to the floor. The floor, the precast plate structure comprises a concrete base and a plurality of metal brackets extending from the concrete base, and the portion of the first steel bar is inserted into the plurality of metal brackets of the precast plate structure; (b1) a support rod is provided, a first end of the support rod is pivotally connected to the protrusion of the precast plate, and a second end of the support rod is pivotally connected to the floor; and (c) a plurality of reinforcing steel bars are provided and connected and fixed to the plurality of metal brackets of the precast plate structure. The manufacturing method of claim 1 further comprises the following steps: (d) setting a first template at an inner side position of the precast plate structure, which forms a first space with the precast plate structure; (e) pouring concrete in the first space between the precast plate structure and the first template; and (f) removing the first template after the concrete reaches initial setting. The manufacturing method of claim 1 or 2, wherein in step (a), the first steel bar comprises a first portion and a second portion substantially perpendicular to the first portion, wherein the first portion protrudes from the floor slab and the second portion is embedded in the floor slab. The manufacturing method of claim 3, wherein in step (b), the pre-cast plate structure has a first surface and a second surface opposite to the first surface, the second surface is substantially flat, each of the plurality of metal brackets of the pre-cast plate structure has a plurality of second steel bars in a continuous bending shape at least partially exposed from the first surface, and the first portion of the first steel bar is inserted into the plurality of second steel bars of the plurality of metal brackets of the pre-cast plate structure. The manufacturing method of claim 4, wherein step (b) further includes inserting and fixing a plurality of third steel bars in a direction substantially perpendicular to the floor plate to strengthen the precast plate structure. As in the manufacturing method of claim 4, wherein in step (b), the protrusion extends a first distance from the first surface of the pre-cast plate structure along an X-axis direction; wherein step (e) includes setting an inner surface of the first template so that the distance between it and the first surface of the pre-cast plate structure is equal to the first distance. The manufacturing method of claim 6, after step (b), further includes inserting a first fixing member through a first connecting member to the protrusion of the precast plate structure, to fix a second surface of the first connecting member against the protrusion, pivotally connecting a first end of a supporting rod to a first surface of the first connecting member opposite to the second surface, and inserting a second fixing member through a second connecting member to the floor plate, to fix a second surface of the second connecting member against the floor plate, and pivotally connecting a second end of the supporting rod to a first surface of the second connecting member opposite to the second surface. The manufacturing method of claim 6, wherein in step (c), the plurality of reinforcing steel bars include a plurality of fourth steel bars and a plurality of fifth steel bars, the plurality of fourth steel bars are arranged approximately parallel to each other and spaced apart in a direction approximately perpendicular to the floor plate and connected and fixed to at least one of the plurality of second steel bars and the plurality of third steel bars of the plurality of metal brackets of the precast plate structure, and the plurality of fifth steel bars are arranged approximately parallel to each other and spaced apart in a direction extending horizontally of the parapet and connected and fixed to the plurality of fourth steel bars. As in the manufacturing method of claim 8, wherein in step (c), each of the plurality of fifth steel bars has a top portion, the top portion is located above the precast plate structure, the top portion has a first portion, a second portion and a third portion, the first portion and the third portion extend along a Y-axis direction, the second portion connects the first portion and the third portion in the X-axis direction, and a fillet is formed at the connection, wherein step (c) further includes arranging a plurality of sixth steel bars substantially in parallel and connecting and fixing to at least one of the first portion, the second portion and the third portion of each of the plurality of fifth steel bars, and wherein step (e) further includes filling a second space occupied by the top portion with concrete. A manufacturing method as claimed in claim 1 or 2, wherein in step (b), after the pre-cast plate structure is set at the predetermined position, a third connecting member is set at an inner corner formed by the pre-cast plate structure and the floor plate, a third fixing member is passed through a first portion of the third connecting member to the floor plate, and a second portion of the third connecting member is connected and fixed to the pre-cast plate structure, and the first portion of the third connecting member is approximately perpendicular to the second portion.

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