How to build a wall parapet

Abstract

To provide a construction method for a wall balustrade capable of shortening the whole construction period including the construction of the wall balustrade.SOLUTION: A backside form 10 placed on the back side of a wall balustrade 1 is installed on the outside in the width direction of a floor slab 2, and a wall surface panel 20 is installed on the inside in the width direction of the floor slab 2 by a support tool 40 so as to form a front side form placed on the front side of the wall balustrade 1. After concrete C is placed between the backside form 10 and the wall surface panel 20 and the back side of the wall surface panel 20 is embedded in the concrete C to be integrated with the concrete C, the support tool 40 is removed before a predetermined concrete curing period elapses. Since the back side form 10 is removed after the concrete curing period has passed, the whole construction period including the construction of the wall balustrade 1 can be shortened.SELECTED DRAWING: Figure 11

Description

[Technical field]

[0001] The present invention relates to a method for constructing a wall parapet to be installed on, for example, a bridge deck. [Background technology]

[0002] Conventionally, a bridge deck is provided with a balustrade made of, for example, reinforced concrete to prevent vehicles or people from falling. This balustrade is constructed by erecting rebar from the ground cover at the deck side end, installing a back side formwork placed on the back side of the balustrade on the side facing the outside of the deck, and installing a front side formwork placed on the front side of the balustrade on the side facing the inside of the deck, and pouring concrete into these formworks (see, for example, Patent Document 1). In this case, the back side formwork and the front side formwork are connected with a gap maintained by multiple separators, and the front side formwork is supported by a support fixed to the deck by anchors. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2013-57215 A Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, for example, in the construction of a bridge using a concrete deck, it is common to lay a waterproof layer on the concrete surface of the deck as a deck waterproofing work to prevent rainwater from penetrating into the concrete of the deck, and then to construct a pavement such as asphalt on top of that, but the deck waterproofing work is constructed after the wall parapet has been constructed.

[0005] However, when constructing a wall parapet by pouring concrete on-site, as in the conventional example, construction of the deck waterproofing work cannot begin until the concrete has had time to cure and the formwork has been removed. Moreover, the time required to remove accessories such as the formwork and supports is also required before construction of the deck waterproofing work can begin, resulting in a problem of prolonging the overall construction period.

[0006] The present invention has been made in consideration of the above-mentioned problems, and an object of the present invention is to provide a method for constructing a wall balustrade that can shorten the overall construction period, including the construction of the wall balustrade. [Means for solving the problem]

[0007] In order to achieve the above-mentioned object, the method of constructing a wall balustrade of the present invention is a method of constructing a wall balustrade on a deck slab using wall panels made of plate-shaped concrete, in which a rear side formwork to be placed on the rear side of the wall balustrade is installed on the outside in the width direction of the deck slab, and the wall panel is installed on the inside in the width direction of the deck slab using supports so as to form a front side formwork to be placed on the front side of the wall balustrade, concrete is poured between the rear side formwork and the wall panel, and the rear side of the wall panel is embedded in the concrete to be integrated with the concrete, and then the supports are removed before a specified concrete curing period has elapsed, and the rear side formwork is removed after the concrete curing period has elapsed.

[0008] This allows the wall panel supports to be removed after the concrete has been poured and before the concrete curing period has elapsed, so that other subsequent construction work (e.g., deck waterproofing) can be started sooner than the period between the removal of the supports and the removal of the rear formwork, without having to wait for the concrete curing period to elapse. Effect of the Invention

[0009] According to the present invention, other subsequent construction work (e.g., deck waterproofing work) can be started without waiting for the concrete curing period of the wall parapet to elapse, thereby making it possible to shorten the entire construction period, including the construction of the wall parapet. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a perspective view of a wall balustrade showing one embodiment of the present invention. [Diagram 2] Rear view of the wall panel [Diagram 3] Side cross-sectional view of wall panel [Figure 4] Wall panel plan [Diagram 5] Plan view of the main part showing the wall panel joining process [Figure 6] Exploded perspective view of the support part [Figure 7] Side cross-sectional view showing the construction process of the wall parapet [Figure 8] Side cross-sectional view showing the construction process of the wall parapet [Figure 9] Side cross-sectional view showing the construction process of the wall parapet [Figure 10] Side cross-sectional view showing the construction process of the wall parapet [Figure 11] Side cross-sectional view showing the construction process of the wall parapet [Figure 12] Side cross-sectional view showing the construction process of the wall parapet [Figure 13] Side cross-sectional view showing the construction process of the wall parapet [Figure 14] Front view showing the construction process of the wall parapet [Figure 15] Front view showing the construction process of the wall parapet [Figure 16] Front view showing the construction process of the wall parapet [Figure 17] A diagram showing the construction process for wall parapets and deck waterproofing DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] 1 to 17 show an embodiment of the present invention, and show a method of constructing a wall parapet provided on a deck of a bridge or the like.

[0012] The wall parapet 1 shown in the figure consists of a parapet made of reinforced concrete, and is installed on the ground cover 3 of the deck 2 by a construction method described below. The deck 2 consists of, for example, a precast concrete deck, and is erected on steel girders (not shown). The wall parapet 1 consists of a so-called Florida-type wall parapet, with the back surface (the surface facing the outside of the deck 2) formed vertically and the front surface (the surface facing the inside of the deck 2) slightly inclined toward the back surface from below to above (for example, inclined at an angle of 84° with respect to the horizontal plane).

[0013] The ground cover 3 is constructed of concrete on the side edge of the deck slab, with its back surface (the surface facing the outside of the deck slab 1) formed vertically and its front surface (the surface facing the inside of the deck slab 1) formed so as to slope downwards towards the front. In addition, the ground cover 3 is provided with reinforcing bars 4 for the wall balustrade that rise upwards from its top surface, and the top surface of the ground cover 3 is formed so as to form a slight downward slope (for example, 2%) towards the inside of the deck slab 1.

[0014] To construct the wall parapet 1 of this embodiment, a rear formwork 10 arranged on the rear side of the wall parapet 1, a wall panel 20 arranged on the front side of the wall parapet 1, a lower formwork 30 arranged on the lower end side of the wall panel 20, and supports 40 supporting the wall panel 20 and the lower formwork 30 are used, and the wall panel 20 is used as a buried formwork forming the front formwork. Also, a plurality of inserts 3a for fixing the rear formwork 10 are buried in advance on the rear side of the ground covering 3, and a plurality of inserts 3b for fixing the supports 40 are buried in advance on the front side of the ground covering 3.

[0015] The rear side formwork 10 is made of a wooden formwork formed by formwork plates 11, vertical frame members 12, and horizontal frame members 13, and its lower end is fixed to the rear of the ground covering 3. On the rear side of the rear side formwork 10, a plurality of single pipes 14 extending in the longitudinal direction of the wall parapet 1 (the bridge axis direction) are arranged at intervals from one another in the up-down direction.

[0016] The wall panel 20 is made of a concrete plate-shaped panel body 21, a mesh-like reinforcing member 22 embedded in the panel body 21, and a connecting member 23 for connecting the panel body 21 to the concrete of the wall balustrade 1, and is manufactured in advance in a factory or the like. The panel body 21 is formed in a rectangular shape, and its upper end face is formed in a mountain-shaped cross section so that the front half in the plate thickness direction and the back half in the plate thickness direction each have a downward slope. The back half in the plate thickness direction of the lower end face of the panel body 21 is formed to have an upward slope, and the front half in the plate thickness direction is formed to form a surface perpendicular to the front face of the panel body 21. In addition, the end face on one side in the width direction of the panel body 21 and the other face on the other side form joint surfaces 21a and 21b to be joined to the adjacent wall panel 20. Each of the joint surfaces 21a, 21b is formed so that the front half in the plate thickness direction is inclined, and the rear side in the plate thickness direction is formed so as to form a surface perpendicular to the rear surface of the panel main body 21. In this case, one inclined surface of each of the joint surfaces 21a, 21b is formed so as to incline toward the inside of the wall panel 20, and the other inclined surface is formed so as to incline toward the outside of the wall panel 20. Although not shown, the rear surface of the panel main body 21 is provided with irregularities, for example, in the shape of a broom, in order to improve adhesion to concrete.

[0017] The reinforcing member 22 is made of a mesh-like metal plate such as an expanded metal having diamond-shaped mesh, and its surface is coated with an anticorrosive coating such as cationic electrocoating. The connecting member 23 is provided on the rear side of the wall panel 20, and is formed by arranging steel materials (e.g., channel steel materials) extending in the vertical and horizontal directions in a rectangular frame shape. The connecting member 23 is joined to the reinforcing member 22, and approximately half of the connecting member 23 in the thickness direction is embedded in the panel body 21, and the other half is exposed to the outside from the rear side of the panel body 21. In addition, a plurality of inserts 24 are embedded in the front side of the panel body 21, and the inserts 24 are arranged at four locations on both sides of the upper width direction and both sides of the lower width direction of the panel body 21.

[0018] The lower formwork 30 is made of a plate-like member, such as a long and narrow concrete panel, and is positioned at the lower end of the wall panel 20 so that its longitudinal direction (bridge axis direction) is horizontal and its thickness direction is front-to-rear.

[0019] The support device 40 includes a first support member 50 supporting the lower end side of the wall panel 20 from the ground covering 3 side, a second support member 60 supporting the upper end side of the wall panel 20 from the first support member 50 side, a third support member 70 supporting the upper end side of the wall panel 20 from the rear side formwork 10 side, a first connecting member 80 connecting the wall panel 20 and the first support member 50, a second connecting member 90 connecting the wall panel 20 and the second and third support members 60, 70, and a fixing member 100 fixing the third support member 70 to the rear side formwork 10.

[0020] The first support member 50 is composed of a fixing part 51 fixed to the front surface of the ground cover 3, a pair of first connecting parts 52 in the width direction to which the second support member 60 is connected, a first supporting part 53 supporting the lower formwork 30, a second supporting part 54 supporting the wall panel 20, and a second connecting part 55 to which the first connecting member 80 is connected. The fixing part 51 is formed so as to be inclined at an angle equal to the front surface of the ground cover 3, and has bolt insertion holes 51a for fixing at two positions, one above and one below. Each of the first connecting parts 52 is formed so as to extend forward from both ends of the fixing part 51 in the width direction, and has bolt insertion holes 52a for connecting at two positions, one above and one below. The first support part 53 is formed in a substantially L-shape so as to support the lower end surface and the front surface of the lower formwork 30, and the part supporting the front surface of the lower formwork 30 is formed so as to be inclined at an angle equal to the inclination of the front surface of the wall balustrade 1. The second support part 54 is formed so as to extend forward from the upper end of the first support part 53, and its upper surface is formed so as to form a flat surface that is long in the width direction. The second connecting part 55 is formed so as to extend upward from the front end of the second support part 54, and is provided with connecting bolt insertion holes 55a at two locations in the width direction. The bolt insertion holes 55a are formed in a circular shape large enough to allow the bolt to move up, down, left and right.

[0021] The second support member 60 is composed of a vertical portion 61 extending in the up-down direction and a horizontal portion 62 extending rearward from the upper end of the vertical portion 61, and the vertical portion 61 and the horizontal portion 62 are formed of members having a U-shaped cross section. The vertical portion 61 is formed longer than the horizontal portion 62, and two connecting bolt insertion holes 61a are provided at the top and bottom of both widthwise side portions on the lower end side of the vertical portion 61, and nuts 61b communicating with the bolt insertion holes 61a are fixed to the inner surfaces of both widthwise side portions. The horizontal portion 62 is formed with connecting bolt insertion holes 62a at both widthwise side portions on the rear end side, and nuts 62b communicating with the bolt insertion holes 62a are fixed to the inner surfaces of both widthwise side portions.

[0022] The third support member 70 is composed of a horizontal portion 71 extending in the front-rear direction and a vertical portion 72 extending downward from the front end of the horizontal portion 71, the horizontal portion 71 and the vertical portion 72 being formed of a member having a U-shaped cross section. The horizontal portion 71 is formed longer than the vertical portion 72, and an engagement portion 71a with which the fixing member 100 engages is provided on the bottom surface portion on the rear end side. A bolt insertion hole 72a for connection is provided on each of both widthwise side portions on the lower end side of the vertical portion 72, and a nut 72b communicating with the bolt insertion hole 72a is fixed to the inner surface side of each of both widthwise side portions.

[0023] The first connecting member 80 is composed of a fixing portion 81 fixed to the lower front surface of the wall panel 20, a height adjustment bolt 82 for adjusting the height position of the wall panel 20 relative to the first support member 50, a bolt mounting portion 83 to which the adjustment bolt 82 is attached, and a connecting portion 84 to which the first support member 50 is connected. The fixing portion 81 is formed to form a surface parallel to the wall panel 20, and is provided with bolt insertion holes 81a for fixing at two locations in the width direction. The bolt mounting portion 83 is formed to extend forward from the lower end of the fixing portion 81, and is provided with bolt insertion holes 83a for inserting the height adjustment bolts 82 at two locations in the width direction. Nuts 83b communicating with the bolt insertion holes 83a are fixed to the lower surface of the bolt mounting portion 83, and the height adjustment bolts 82 inserted from above through the bolt insertion holes 83a are screwed into the nuts 83b. The connecting portion 84 is formed to extend downward from the front end of the bolt attachment portion 83, and has a bolt insertion hole 84a for connection, and a nut 84b communicating with the bolt insertion hole 84a is fixed to the back side.

[0024] The second connecting member 90 is composed of a fixing portion 91 fixed to the upper front surface of the wall panel 20 and a pair of connecting portions 92 in the width direction to which the second and third support members 60, 70 are connected. The fixing portion 91 is formed to form a surface parallel to the wall panel 20, and its lower end side is bent forward in a substantially L-shape. Two bolt insertion holes 91a for fixing are provided in the fixing portion 91 in the width direction, and each bolt insertion hole 91a is formed in the shape of a long hole extending in the width direction. Each connecting portion 92 is formed to extend vertically from the fixing portion 91, and is disposed inside each bolt insertion hole 91a at intervals from each other in the width direction. Two connecting portions 92 in the upper and lower directions are provided with bolt insertion holes 92a for connecting, and each bolt insertion hole 92a is formed in the shape of a long hole extending in the vertical direction.

[0025] The fixing member 100 is composed of a pair of U-shaped side plates 101 spaced apart from each other in the width direction, an intermediate plate 102 joined to each side plate 101, and a fixing bolt 103 attached to the intermediate plate 102, and each side plate 101 is formed in a U-shape. The intermediate plate 102 is disposed inside each side plate 101, and is formed in an L-shape so that its upper surface portion extends forward along the upper end side of each side plate 101. The fixing bolt 103 is inserted in the vertical direction into the upper surface portion of the intermediate plate 102, and the fixing bolt 103 is screwed into a nut 102a fixed to the lower surface of the upper surface portion of the intermediate plate 102. The lower end side of the fixing bolt 103 protrudes inside each side plate 101 and is adapted to engage with an engaging portion 71a of the third support member 70, and a hole is provided in the engaging portion 71a with which the lower end side of the fixing bolt 103 engages.

[0026] Here, a method for constructing the wall parapet 1 in this embodiment will be described with reference to Figures 7 to 16. In the following description, a case will be shown in which the wall parapet 1 is constructed after the girders 3 have been formed on the deck slab 2 and reinforcing bars 4 have been arranged in the girders 3.

[0027] 7 and 8, the lower end of the rear-side formwork 10 is fixed to the rear of the ground covering 3 by fastening the single-tube pipe 14 below the rear-side formwork 10 to the insert 3a on the rear side of the ground covering 3 with a fixing bracket 15. In addition, the fixing portion 51 of the first support member 50 of the support 40 is fastened to the insert 3b on the front side of the ground covering 3 with a bolt 56, thereby fixing the first support member 50 to the front side of the ground covering 3.

[0028] Next, as shown in Figures 8, 9 and 14, the lower formwork 30 is supported by the first support part 53 of the first support member 50, and the lower end side of the wall panel 20 is supported by the second support part 54 of the first support member 50. A first connecting member 80 is fixed to the wall panel 20 in advance, and the wall panel 20 is supported by the second support part 54 via the first connecting member 80. The first connecting member 80 is fixed to the wall panel 20 by screwing a bolt 85 that passes through the fixing part 81 into the insert 24 on the front lower side of the wall panel 20. The bolt 85 is inserted into either one of the left and right bolt insertion holes 81a of the fixing part 81.

[0029] When the wall panel 20 is supported by the first support member 50, as shown in Fig. 14, the wall panel 20 is temporarily placed on the first support member 50 with a gap in the width direction from the existing wall panel 20 installed on one side in the width direction. As a result, the lower end of the height adjustment bolt 82 of the first connecting member 80 abuts against the second support part 54, and the height of the wall panel 20 relative to the first support member 50 is adjusted by the height adjustment bolt 82. The height adjustment bolt 82 is inserted into either one of the left and right bolt insertion holes 83a of the bolt mounting part 83.

[0030] Thereafter, as shown in Figures 14 and 15, the wall panel 20 is shifted in the width direction and the width direction end portion is joined to the existing wall panel 20. At this time, as shown in Figure 5(a), adhesive S (e.g., polyurethane adhesive) is applied to the joining surface 21a on one side in the width direction of one wall panel 20, and as shown in Figure 5(b), it is engaged so as to butt against the joining surface 21b on the other side in the width direction of the other wall panel 20. As a result, since the inclined surfaces of the joining surfaces 21a and 21b are inclined in the same direction, the relative movement of the wall panels 20 in the thickness direction is restricted by the inclined surfaces of the joining surfaces 21a and 21b.

[0031] Next, the bolt 57 inserted through the bolt insertion hole 55a of the second connecting portion 55 of the first support member 50 is screwed into the nut 84b of the connecting portion 84 of the first connecting member 80, thereby connecting the first connecting member 80 to the first support member 50. At this time, since the bolt insertion hole 55a is formed larger than the outer diameter of the bolt 57, the positional deviation in the vertical direction and the width direction of the second connecting portion 55 relative to the first support member 50 is absorbed. The first support members 50 are disposed at the butt positions of the adjacent wall panels 20, and the first connecting members 80 of each wall panel 20 are connected to one first support member 50. As a result, the wall panels 20 are connected to each other by the first connecting members 80 and the first support members 50.

[0032] Next, the second connecting members 90 are fixed to the adjacent wall panels 20. The second connecting members 90 are arranged so that both widthwise ends of the fixing parts 91 span the front faces of the wall panels 20, and are fixed to the wall panels 20 by screwing the bolts 93 inserted through the bolt insertion holes 91a of the fixing parts 91 into the inserts 24 on the upper front faces of the wall panels 20. In this way, the wall panels 20 are connected to each other by the second connecting members 90.

[0033] Next, as shown in Fig. 10 and Fig. 16, the second support member 60 is attached to the first support member 50, and the upper end side of the wall panel 20 is supported by the second support member 60. At this time, the bolt 63 inserted through the bolt insertion hole 51a of each first connecting portion 52 of the first support member 50 is screwed into the nut 61b on the lower end side of the second support member 60, thereby connecting the lower end side of the second support member 60 to the first support member 50. In addition, the bolt 64 inserted through one of the bolt insertion holes 92a (lower side) of the second connecting member 90 is screwed into the nut 62b on the upper end side of the second support member 60, thereby connecting the upper end side of the second support member 60 to the second connecting member 90.

[0034] 11 and 16, a third support member 70 is attached to the upper end of the rear-side formwork 10, and the upper end side of the wall panel 20 is supported by the third support member 70. At this time, the upper horizontal frame member 13 of the rear-side formwork 10 and the rear end side of the third support member 70 are sandwiched by the fixing member 100, and the fixing bolt 103 is tightened to fix the third support member 70 to the upper end of the rear-side formwork 10. In addition, the bolt 73 inserted through the other bolt insertion hole 92a (upper side) of the second connecting member 90 is screwed into the nut 72b on the front end side of the third support member 70, thereby connecting the front end side of the third support member 70 to the second connecting member 90.

[0035] After the installation of the formwork is completed as described above, concrete C is poured into the space between the rear formwork 10 and the wall panel 20 as shown in FIG. 11. At that time, the connecting member 23 on the rear side of the wall panel 20 is embedded in the concrete C. After that, the support 40 is removed, leaving the rear formwork 10 and the lower formwork 30 as shown in FIG. 12. The poured concrete usually develops its strength in about one day, and the wall panel 20 embedded in the concrete C is held, so it is possible to remove the support 40, for example, the day after pouring. Since the support 40 is removed, work can be performed in front of the wall balustrade 1, and construction of the deck waterproofing work (laying of the waterproof layer 5) is started. Then, after a predetermined concrete curing period has passed, the rear formwork 10 and the lower formwork 30 are removed, and the construction of the wall balustrade 1 is completed as shown in FIG. 13. At this time, the front surface of the wall parapet 1 is formed by a wall panel 20, and the wall panel 20 is embedded in the concrete C by connecting members 23, so that the wall panel 20 is firmly integrated with the concrete C. The curing period for concrete varies depending on the season (outdoor temperature) and the cement used in the concrete, but for example, it is about 5 days for ordinary cement.

[0036] Thus, according to this embodiment, the rear side formwork 10, which is placed on the rear side of the wall parapet 1, is installed on the outside in the width direction (perpendicular to the bridge axis) of the deck 2, and the wall panel 20 is installed on the inside in the width direction of the deck slab 2 by supports 40 so as to form a front side formwork which is placed on the front side of the wall parapet 1. Concrete C is poured between the rear side formwork 10 and the wall panel 20, and the rear side of the wall panel 20 (connecting member 23) is embedded in the concrete C to be integrated with the concrete C. Then, the supports 40 are removed before the specified concrete curing period has elapsed, and the rear side formwork 10 is removed after the concrete curing period has elapsed, thereby shortening the overall construction period, including the construction of the wall parapet 1.

[0037] That is, as shown in FIG. 17, construction of the wall parapet 1 is carried out in the following order: installation of the rear formwork 10, installation of the wall panel 20, pouring of concrete C, removal of the supports 40, and removal of the rear formwork 10. In this embodiment, however, the supports 40 of the wall panel 20 are removed after a time T1 has elapsed since the pouring of the concrete C has been completed, so that construction of the slab waterproofing work can be started earlier by the period T3 between the removal of the supports 40 and the removal of the rear formwork 10, without waiting for the concrete curing period T2 to elapse.

[0038] In addition, the wall panel 20 is made of a panel material in which a mesh-like reinforcing member 22 is embedded in a plate-like formwork body 21 made of concrete, so that sufficient strength can be ensured even if the thickness dimension is reduced.

[0039] Furthermore, since the support device 40 is equipped with first and second support members 50, 60 that support the upper and lower ends of the wall panel 20 from the ground covering 3 side, there is no need for a support supporting the formwork from above the deck as in the conventional method, and the support structure can be simplified.

[0040] In addition, the support 40 includes a third support member 70 that supports the upper end side of the wall panel 20 from the rear formwork 10, which eliminates the need for a separator that connects the rear formwork and the front formwork as in the past, and has the advantage that there is no interference between the separator and the reinforcing bars. In particular, when a communication pipe is placed inside the wall parapet 1, there is an extreme advantage in that there is no interference between the separator and the communication pipe.

[0041] Furthermore, a new wall panel 20 is temporarily placed on the support 40 at a widthwise interval on one side of the existing wall panel 20 supported by the support 40, and the height position of the new wall panel 20 is adjusted on the support 40 by the height adjustment bolt 82. After that, the new wall panel 20 is shifted in the width direction relative to the support 40 and joined to the widthwise end of the existing wall panel 20 via the adhesive S, and the new wall panel 20 is supported by the support 40. Therefore, the height of the wall panel 20 can be adjusted before joining via the adhesive S, and the height adjustment work and joining work of the wall panel 20 can be performed efficiently.

[0042] In addition, the wall panels 20 are formed so that the joining surfaces 21a, 21b at the widthwise ends of adjacent wall panels 20 engage with each other in a manner that can regulate the movement of the wall panels 20 in the thickness direction, so that adjacent wall panels 20 can be joined together without any misalignment in the thickness direction.

[0043] In the above embodiment, the first support member 50, the second support member 60, the third support member 70, the first connecting member 80, the second connecting member 90 and the fixing member 100 of the support device 40 are each constructed as separate parts and assembled on site, but at least a portion of these components may be constructed as a single unit.

[0044] In addition, in the above embodiment, a Florida-type wall balustrade in which the wall panel 20 is inclined is shown, but the present invention can also be applied to a straight-wall-type wall balustrade in which the wall panel is provided vertically.

[0045] The above embodiment is merely an example of the present invention, and the present invention is not limited to the above embodiment. [Explanation of symbols]

[0046] 1...wall parapet, 2...deck slab, 3...ground covering, 4...reinforcing bar, 5...waterproof layer, 10...rear formwork, 20...wall panel, 30...lower formwork, 40...support, 50...first support member, 60...second support member, 70...third support member, 80...first connecting member, 90...second connecting member, 100...fixing member.

Claims

1. A method for constructing a wall balustrade on a floor slab using a wall panel made of plate-shaped concrete, comprising: A rear side formwork to be arranged on the rear side of the wall balustrade is installed on the outer side in the width direction of the floor slab, The wall panel is installed on the inner side in the width direction of the floor slab using a support tool so as to form a front side formwork to be placed on the front side of the wall parapet, Concrete is poured between the rear formwork and the wall panel, and the rear side of the wall panel is embedded in the concrete to integrate it with the concrete. The support is removed before a predetermined concrete curing period has elapsed; After the concrete curing period has elapsed, the rear formwork is removed.

13. A method for constructing a wall parapet, comprising:

2. The wall panel is formed by embedding a mesh-like reinforcing member in the panel body.

2. A method for constructing a wall parapet according to claim 1.

3. As the support, a support having support members for supporting the upper and lower ends of the wall panel is used.

3. A method for constructing a wall parapet according to claim 2.

4. As the support member, a support tool having a connecting member that connects the upper end side of the wall panel and the rear side formwork above the wall balustrade is used.

4. A method for constructing a wall parapet according to claim 3.

5. A new wall panel is temporarily placed on the support at a widthwise interval on one side of the existing wall panel supported by the support, After adjusting the height of the new wall panel on the support, A new wall panel is shifted in the width direction relative to the support and joined to the width direction end of the existing wall panel via an adhesive; The new wall panel is supported by a support.

5. A method for constructing a wall parapet according to claim 1, 2, 3 or 4.

6. As the wall panel, a wall panel is used in which the joint surfaces of the widthwise ends of adjacent wall panels engage with each other so as to restrict the movement of the wall panels in the thickness direction.

6. A method for constructing a wall parapet according to claim 5.

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