KR20060009992A - Method for building and removing mould of bridge and multistage mould - Google Patents

Abstract

The present invention, the first step of seating the outer wall die set on the head head temporary facility; A second step of forming floor concrete in the space secured by the outer wall formwork set; A third step of installing a system supporter on the bottom concrete upper surface, and installing a vertical inner wall plate such that an outer surface is spaced a predetermined distance from an inner surface of the outer wall formwork set; A fourth step of pouring one-stage concrete; A fifth step of drawing out the vertical inner wall plate to the outside; Coupling a horizontal inner wall plate to the upper end of the system supporter; A seventh step of forming two-stage concrete above the horizontal inner wall plate and the outer wall formwork set; It is configured to include the eighth step of disassembling the horizontal inner wall plate and the system supporter to take it to the outside and removing the outer wall formwork set, which can shorten the time required to install and dismantle the inner wall formwork and the outer wall formwork, And it can improve the recyclability of the material and provides a bridge form desorption method and multi-stage formwork that can reduce the construction cost by simplifying the process of manufacturing the inner wall formwork and the outer wall formwork.

Pier, formwork, concrete, outer wall, inner wall, temporary vent, head tofu

Description

Method for building and removing mold of bridge and multistage mold}

Figures 1a to 1c shows a conventional formwork detachment process for the main head construction of the bridge.

2 is a flow chart of the bridge formwork desorption method according to the present invention.

Figure 3a shows the shape of coupling the outer wall formwork set to the head head temporary fixture.

Figure 3b shows the shape of the outer wall formwork set is formed so that the vertical outer wall plate is inclined.

Figure 4 shows the shape to form the floor concrete after the completion of the combination of the outer wall formwork set.

5 to 6 show the shape of installing the vertical inner wall plate and the system supporter.

7 shows a shape of forming one-stage concrete between the vertical outer wall plate and the vertical inner wall plate.

8 shows a shape of installing a horizontal inner wall plate.

9 shows a shape of forming two-stage concrete above the horizontal inner wall plate.

10 to 11 show a shape of dismantling the outer wall and the inner wall formwork set.

<Description of the symbols for the main parts of the drawings>

100: outer wall formwork set 110: one-stage outer wall formwork

111, 121: vertical outer wall plates 112, 122: horizontal beams

113, 123: vertical beam 114, 125: brace turn buckle

120: two-stage outer wall formwork 125: horizontal outer wall plate

130: provisional vent 132: screw jack

200: inner wall die set 210: vertical inner wall plate

212: form-tie 220: system supporter

230: horizontal inner wall plate 310: floor concrete

320: 1st stage concrete 330: 2nd stage concrete

The present invention relates to a multi-stage formwork configured to be detachable without damaging the formwork during the construction of the main head of the bridge, and more specifically, to the installation of the completed form on top of the main head head temporary installation After the concrete is poured and the curing of the concrete is completed, the formwork is removed without disassembling, thereby simplifying the bridge construction process and reducing the time and cost required for formwork. It relates to a multi-stage formwork configured to be detachable in the same way.

The main head construction of a conventional bridge is composed of concrete pouring after the inner wall formwork and the outer wall formwork, and dismantles and removes the inner wall formwork and the outer wall formwork when the concrete curing is completed.

Hereinafter, with reference to the accompanying drawings will be described with respect to the conventional formwork and formwork desorption method for the construction of the main head of the bridge.

Figures 1a to 1c shows a conventional formwork detachment process for the main head construction of the bridge.

In the case of installing the formwork according to the conventional method, as shown in FIG. 1A, first, a vertical outer wall plate 22 and a support structure 25 are installed on the upper surface of the head head temporary facility 10, and a plurality of fragment panels 32 are connected to each other. After installing the inner wall formwork 30, the concrete is poured to a certain height to form a floor concrete (40).

When the bottom concrete 30 is cured over a certain strength, as shown in FIG. 1B, the copper bar 26 is installed on the upper surface of the supporting structure 25, and the horizontal outer wall plate 24 has a structure in which a load is applied to the copper bar 26. Complete the outer wall formwork 20 by installing the. When the outer wall formwork 20 is completed, the first stage concrete 50 is formed by pouring concrete to the upper end of the horizontal outer wall plate 24, wherein the first-stage concrete 50 forms a fragment panel constituting the inner wall formwork 30 ( 32) A panel outlet for drawing out is formed.

When curing of the bottom concrete 40 and the first-stage concrete 50 is completed, the outer wall formwork 20 and the inner wall formwork 30 are dismantled, and the outer wall formwork 20 is a copper wheel 26 as shown in FIG. 1C. ), The horizontal outer wall plate 24, the support structure 25, the vertical outer wall plate 22 are separated and dismantled, and the inner wall formwork 30 is drawn out through the panel outlet after separating the respective fragment panels 32. Dismantled in a way.

However, in the case of installing and dismantling the formwork 20 and 30 in the above manner, it is very difficult to maintain the verticality of the vertical outer wall plate 22 as well as the work is very dangerous, and the group of the horizontal outer wall plate 24 In order to install (26), it is necessary to separately manufacture and install the copper bar vent, and to add the weight of the copper bar vent, the member of the head head temporary facility 10 needs to be manufactured more firmly. .

In addition, in the process of installing the inner wall formwork 30, each piece panel 32 must be combined so that it takes not only a long time to install, but also to separate and tear off each piece panel 32 when dismantling the inner wall formwork 30. Loss of material is increased and once installed inner wall formwork 30 can not be reused as it was a disadvantage that the construction time increases.

The present invention has been made to solve the above problems, can shorten the time required to install and dismantle the inner wall formwork and the outer wall formwork, can improve the safety of work and recycling of materials, the inner wall formwork And by simplifying the process of manufacturing the outer wall formwork is to provide a bridge formwork desorption method and multi-stage formwork that can reduce the construction cost.

Bridge formwork installation method according to the present invention for achieving the above object, the first step of seating the outer wall formwork set to secure a space that can be cast concrete on the head head temporary facility; A second step of mounting a system supporter in a space secured by the outer wall form set, and installing a vertical inner wall plate such that an outer surface is spaced a predetermined distance from an inner surface of the outer wall form set; A third step of pouring the first stage concrete so that a Timber outlet is formed between the outer formwork set and the vertical inner wall plate; A fourth step of drawing out the vertical inner wall plate to the outside; A fifth step of coupling a horizontal inner wall plate formed so that the outer end is in close contact with the entire inner surface of the first stage concrete to the upper end of the system supporter; A sixth step of forming two-stage concrete above the horizontal inner wall plate and the outer wall formwork set; And a seventh step of disassembling the horizontal inner wall plate and the system supporter, taking it out through the timbre outlet, and removing the outer wall formwork set.

The outer wall formwork set includes a temporary vent having a structure capable of vertical height adjustment, and at least one outer wall formwork composed of a vertical outer wall plate and a horizontal beam; The first step includes steps 1-1 for coupling the temporary vent to the upper surface of the temporary head temporary facility and 1-2 steps for coupling the outer wall formwork to the upper surface of the temporary vent; The seventh step includes steps 7-1 for lowering the vertical height of the provisional vent and step 7-2 for lifting the outer wall formwork.

The outer wall formwork includes a first stage outer wall formwork formed of a vertical outer wall plate and a horizontal beam and coupled to an upper surface of a temporary facility vent, and a second stage outer wall formwork coupled to an upper surface of a first stage outer wall formwork having a horizontal outer wall plate at an upper end thereof. ; Step 7-2 is configured to include lifting the two-stage outer wall formwork and lifting the first-stage outer wall formwork.

At this time, the first stage outer wall formwork, it may be configured to be installed two or more in the vertical direction depending on the height of the first stage concrete.

The method of installing the vertical inner wall plate in the second step is configured to be coupled to the outer wall formwork set so as to be spaced a certain distance from the inner surface of the outer wall formwork set using a form-tie; The fourth step is configured to lift the vertical inner wall plate outward after removing the form-tie.

In addition, the multi-stage formwork according to the present invention is formed of an integral structure capable of withstanding horizontal and vertical loads, two or more outer wall formwork coupled to the upper surface of the head head temporary structure in a structure in which the center is empty so as to secure space for vertical concrete pouring A set; It is configured to include an inner wall form set is coupled to the outer surface is spaced apart from the inner wall form a predetermined interval.

The outer wall formwork set is configured to include a provisional vent having a structure capable of adjusting the vertical height, and at least one outer wall formwork configured to couple the vertical outer wall plate and the horizontal beam.

At this time, the outer wall formwork, the first stage outer wall formwork coupled to the upper surface of the vent vent; A horizontal outer wall plate formed in a shape capable of placing concrete on the upper side is additionally provided at the upper end and includes a two-stage outer wall formwork coupled to the upper surface of the first stage formwork. In addition, the outer wall formwork is coupled to the vertical outer wall plate and the horizontal beam both ends are configured to support the vertical outer wall plate, and further includes a turnbuckle for the brace is configured of a structure capable of self-length adjustment.

The inner wall form set includes a vertical inner wall plate coupled to an outer surface to be spaced apart from the inner surface of the outer wall form set by a predetermined distance; A system supporter fabricated to have a lower height than the outer wall formwork set and positioned between the outer wall formwork sets; It is configured to include a horizontal inner wall plate coupled to the top of the system supporter.

At this time, the vertical inner wall plate is coupled to the outer wall form set to be spaced a predetermined distance from the inner surface of the outer wall form set by the form-tie. In addition, the system supporter, which can support a vertical load of a predetermined size or more, is composed of a structure that can be combined and disassembled.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the bridge formwork desorption method and multistage formwork according to the present invention.

2 is a flow chart of the bridge formwork desorption method according to the present invention.

Bridge form desorption method according to the present invention, as shown in Figure 2, the temporary construction of a structure that can be adjusted vertical height is coupled to the screw jack, a vertical outer wall plate and each vertical outer wall plate in direct contact with concrete A first step (S10) of seating and combining two or more outer wall formwork sets configured as horizontal beams for securing concrete space on the head head temporary facility; A second step (S20) of seating the system supporter in a space secured by the outer wall formwork set and installing a vertical inner wall plate having a vertical flat plate shape so that the outer surface is spaced a predetermined distance from the inner surface of the outer wall formwork set; A third step (S30) of forming concrete between the outer wall formwork set and the vertical inner wall plate to form a vertical wall-shaped first stage concrete having a timbre outlet; When the first-stage concrete is cured to have a certain size of strength, a fourth step (S40) of removing the vertical inner wall plate coupled to the first-stage concrete inner wall surface to the outside; A fifth step (S50) of coupling a horizontal inner wall plate formed so that the outer end is in close contact with the upper end of the inner surface of the first stage concrete to the upper end of the system supporter; A sixth step (S60) of forming concrete on the upper side of the horizontal inner wall plate and the upper side of the outer concrete set to form two-stage concrete that becomes the upper plate portion of the piers; When curing of the two-stage concrete is completed, the horizontal inner wall plate and the system supporter are disassembled and drawn out to the outside through the timber outlet, and the seventh step (S70) of removing the outer wall formwork set is configured.

The first step (S10) further comprises the step of forming a floor concrete of a certain height in the space secured by the outer wall form set; In the second step, the system supporter is seated so that the lower end is in close contact with the upper surface of the bottom concrete.

In this case, the first step is preferably configured to couple the temporary vent to the upper surface of the temporary head temporary facility, and then combine the outer wall formwork to the upper surface of the temporary vent, and the seventh step is to lower the vertical height of the temporary vent by operating the screw jack It should be configured to lift and dismantle the formwork.

When the outer wall formwork is formed into a vertical outer wall plate and a horizontal beam, it is separated into a one-stage outer wall formwork coupled to the upper surface of the temporary facility vent, and a horizontal outer wall form on the upper end and a two-stage outer wall formwork coupled to the upper surface of the first stage outer wall formwork. In case of disassembling by lifting external formwork, second stage outer wall formwork should be lifted first and then dismantled.

In addition, when the first-stage concrete is to be formed high, by loading a large number of first-stage outer wall formwork in the vertical direction to increase the height of the entire outer wall formwork set.

In the second step, it is preferable to use a form-tie when combining the vertical inner wall plate with the outer wall form set so as to be spaced apart from the inner surface of the outer wall form set by a certain distance. Should be configured to first remove the form-tie and then to lift the vertical inner wall to the outside.

Figure 3a shows the shape of coupling the outer wall formwork set to the head head temporary fixture.

As shown in FIG. 3A, the outer wall formwork set 100 coupled to the upper surface of the head head temporary facility 10 includes a temporary jack 130 having a structure in which a screw jack 132 is coupled to the middle to adjust vertical height. And, it comprises a plurality of one-step outer wall formwork 110 coupled to the upper surface of the temporary vent 130, and two-stage outer wall formwork 120 coupled to the upper surface of the first stage formwork 110.

The first stage outer wall formwork 110 and the second stage outer wall formwork 120 are vertical outer wall plates 111 and 121 which are in direct contact with concrete to form concrete in a predetermined shape, and horizontal beams 112 for standing up the outer wall formwork. 122, the vertical beams 113 and 123 serving as a group for supporting the upper load, and both ends thereof are coupled to the vertical outer wall plates 111 and 121 and the horizontal beams 112 and 122, so that the vertical outer wall plates 111, 121) is configured to support the turnbuckles (114, 125) for the brace is configured in a structure capable of adjusting its length.

In addition, the two-stage outer wall formwork 120 is further provided with a horizontal outer wall plate 124 formed in a shape capable of placing concrete on the upper side, the concrete is poured into the upper side of the horizontal outer wall plate 124 is cured Will be the top plate of the head.

At this time, the first stage outer wall formwork 110, the second stage outer wall formwork 120, the provisional vent 130 are all independently produced before being coupled to the head tofu provisional facility (10). Therefore, the user can complete the exterior wall formwork set 100 by simply lifting the first stage exterior wall formwork 110, the second stage exterior wall formwork 120, and the provisional vent 130 to be prepared in advance. Construction time can be drastically shortened than when the external wall formwork is manufactured directly, and the first stage outer wall formwork 110, the second stage outer wall formwork 120, and the provisional vent 130 can be reused several times. Can be reduced.

In the present embodiment, one stage outer wall formwork 110 is configured to be stacked vertically, but when the overall height of the outer wall formwork set 100 is to be set low, only one stage outer wall formwork 110 may be applied. When the overall height of the outer wall formwork set 100 is to be set high, three or more stages of outer wall formwork 110 may be applied to be vertically stacked. In addition, when the total height of the outer wall formwork set 100 is to be set very low, the first stage outer wall formwork 110 may be omitted and the second stage outer wall formwork 120 may be directly coupled to the upper surface of the temporary vent 130. .

Figure 3b shows the shape of the outer wall formwork set is formed so that the vertical outer wall plate is inclined.

The vertical outer wall plates 111 and 121 applied to the present invention are not limited to be vertically erected, and may be installed to be inclined at a predetermined angle as shown in FIG. 3B according to the shape of the pier.

At this time, the vertical outer wall plate (111, 121), the lower end is the vertical center axis of the main head temporary provision 10 than the upper end to facilitate separation of the first stage outer wall formwork 110 and the second stage outer wall formwork 120 It is preferred to be installed so as to be inclined close to. The process of separating the first stage outer wall formwork 110 and the second stage outer wall formwork 120 will be described below with reference to a separate drawing.

Figure 4 shows the shape of forming the bottom concrete after the completion of the combination of the outer wall form set, Figures 5 to 6 shows the shape of installing the vertical inner wall plate and the system supporter.

When the installation of the outer wall form set 100 is completed, as shown in Figure 4, after placing a certain amount of concrete between the outer wall form set 100 to form a certain curing period, after the bottom concrete 310 is formed in FIG. As shown, the vertical inner wall plate 210 and the system supporter 220 are coupled to be seated on the top surface of the bottom concrete 310. At this time, the vertical inner wall plate 210 is finally coupled to surround all sides of the system supporter 220 as shown in FIG.

The inner wall formwork set 200 applied to the present invention includes a vertical inner wall plate 210, a system supporter 220, and a horizontal inner wall plate 230 (not shown), among which a horizontal inner wall plate ( 230 is applied in a later step, so a description of the horizontal inner wall plate 230 will be described with reference to a separate drawing.

Like the first stage outer wall formwork 110, the second stage outer wall formwork 120, and the provisional vent 130, the vertical inner wall plate 210 and the system supporter 220 are also independently prepared in advance, and thus, the inner wall at the construction site. Compared with the prior art of manufacturing formwork, construction time can be shortened and construction cost can be reduced.

In addition, the vertical inner wall plate 210 is coupled so that the outer surface is spaced apart from the inner surface of the vertical outer wall plate (111, 121) by a predetermined distance, the upper end of the system supporter 220 when seated on the upper surface of the floor concrete (310) It is configured to be positioned lower than the horizontal outer wall plate 124.

At this time, the vertical inner wall plate 210 is coupled to the vertical outer wall plate (111, 121) to be spaced apart from the inner surface of the vertical outer wall plate (111, 121) by a form-tie 212, as shown in FIG. do. However, the method of coupling the vertical inner wall plate 210 to the outer wall plate using the form-tie 212 is just one embodiment, and the vertical inner wall plate (ie, spaced apart from the inner surfaces of the vertical outer wall plates 111 and 121 by a predetermined distance). The method of combining 210 may be modified and applied to various methods.

7 shows a shape of forming one-stage concrete between the vertical outer wall plate and the vertical inner wall plate.

When the installation of the vertical inner wall plate 210 and the system supporter 220 is completed as shown in FIG. 6, the concrete is disposed between the vertical inner wall plate 210 and the vertical outer wall plates 111 and 121 as shown in FIG. 7. By pouring the first stage concrete 320 having a timber (Timber) outlet (not shown) is formed. Timber outlet is an outlet that is made to withdraw the vertical inner wall plate 210 and the system supporter 220 to the outside when the concrete casting is completed, it is used as a checker that serves as a passage of the internal structure inspector after all the construction is completed.

Like the floor concrete 310, the first-stage concrete 320 is also cured for a certain period of time to give a certain size or more strength, and if the first-stage concrete 320 has a certain size or more strength, form-tie 212 After dismantling, the vertical inner wall plate 210 is lifted and separated.

At this time, the vertical inner wall plate 210 is not broken into pieces, as in the prior art, and can be reused in another concrete construction because the whole is integrally separated. Therefore, the use of the vertical inner wall plate 210 according to the present invention, not only can reduce the loss of materials generated when the vertical inner wall plate 210 is separated, but also renew the vertical inner wall plate 210 every time a concrete construction is performed. The advantage is that it does not need to be manufactured.

In addition, the system supporter 220 can be disassembled and assembled, and when disassembled, each part is formed in a shape and size that can be drawn out through the timbre outlet.

FIG. 8 shows a shape of installing a horizontal inner wall plate, and FIG. 9 shows a shape of forming two-stage concrete above the horizontal inner wall plate.

When dismantling of the vertical inner wall plate 210 is completed, the horizontal inner wall plate 230 is formed so that the outer end is in close contact with the upper end of the inner surface of the first stage concrete 320 as shown in FIG. 8 of the system supporter 220. To the top.

When the coupling of the horizontal inner wall plate 230 is completed, as shown in FIG. 9, two levels of concrete are poured into the upper surfaces of the horizontal inner wall plate 230, the first stage concrete 320, and the horizontal outer wall plate 124. 330 is formed. Since the horizontal inner wall plate 230, the first stage concrete 320, and the horizontal outer wall plate 124 are formed to be in close contact with each other, the concrete placed on the upper surface is cured without flowing down.

At this time, the horizontal inner wall plate 230 and the system supporter 220 is a structure that can withstand a certain size of load and can be disassembled and assembled.

Through the above process, the bottom concrete 310 and the first stage concrete 320 and the second stage concrete 330 which are poured and cured form the main head of the bridge.

10 to 11 show a shape of dismantling the outer wall and the inner wall formwork set.

When curing of the two-stage concrete 330 is completed, as shown in FIG. 10, the system supporter 220 and the horizontal inner wall plate 230 are sequentially disassembled and then drawn out to the outside through the timber outlet.

In addition, in order to disassemble the outer wall formwork set 100, first, the vertical height of the provisional vent 130 is lowered by rotating the screw jack 132. When the vertical height of the temporary vent 130 is lowered as described above, the first stage outer wall formwork 110 and the second stage outer wall formwork 120 coupled to the upper surface of the temporary facility vent 130 are moved downward to each concrete (310 to 330). ) Will be released.

When the vertical height descending of the provisional vent 130 is completed, as shown in FIG. 11, after releasing the coupling between the first stage outer wall formwork 110 and the second stage formwork, the second stage outer wall formwork 120 is lifted and separated. After releasing the coupling between the first stage outer wall formwork 110 and the temporary vent 130, the first stage outer wall formwork 110 is separated by lifting, and finally, the temporary vent 130 is lifted and separated. At this time, since the first stage outer wall formwork 110, the second stage outer wall formwork 120, and the provisional vent 130 have a large self load, the first stage outer wall formwork 110 is preferably lifted by a crane.

Thus, the first stage outer wall formwork 110, the second stage outer formwork 120, and the temporary vent 130 is separated while maintaining its own shape, it can be reused as it is in another concrete construction site.

As mentioned above, although this invention was demonstrated in detail using the preferable embodiment, the scope of the present invention is not limited to a specific embodiment and should be interpreted by the attached claim. In addition, those skilled in the art should understand that many modifications and variations are possible without departing from the scope of the present invention.

By using the bridge formwork desorption method and the multi-stage formwork according to the present invention, it is possible to shorten the time required to install and dismantle the inner wall formwork and the outer wall formwork, to improve the safety of the work and the recyclability of the material, the inner wall formwork And by simplifying the process of manufacturing the outer wall formwork there is an advantage that can reduce the construction cost.

Claims (14)

A first step (S10) of seating the outer wall formwork set 100 to secure a space for placing concrete on the head head temporary facility 10; The system supporter 220 is seated in a space secured by the outer wall formwork set 100, and the vertical inner wall plate 210 is installed so that the outer surface is spaced apart from the inner surface of the outer wall formwork set 100 by a predetermined distance. Step 2 (S20); A third step (S30) of forming a first-stage concrete 320 such that a timber outlet is provided between the outer wall formwork set 100 and the vertical inner wall plate 210; A fourth step (S40) of drawing out the vertical inner wall plate (210) to the outside; A fifth step (S50) of coupling a horizontal inner wall plate 230 formed at an outer end to be in close contact with the entire inner surface of the bottom concrete 320 at an upper end of the system supporter 220; A sixth step (S60) of forming two-stage concrete 330 on the horizontal inner wall plate 230 and the outer wall formwork set 100; A seventh step (S70) of disassembling the horizontal inner wall plate 230 and the system supporter 220 to draw out to the outside through the timbre outlet, and removing the outer wall formwork set 100; Bridge formwork desorption method, characterized in that consisting of. The method of claim 1, The outer wall die set 100, A temporary vent 130 configured to have a vertical height adjustable structure, and one or more outer wall formwork having vertical outer wall plates 111 and 121 and horizontal beams 112 and 122; The first step (S10), A step 1-1 for coupling the temporary vent 130 to the upper surface of the temporary head temporary facility 10, and a step 1-2 for coupling the outer wall formwork to the upper surface of the temporary vent 130; The seventh step (S70), Bridge form desorption method comprising a 7-1 step of lowering the vertical height of the provisional vent 130, and 7-2 step of lifting the outer wall formwork. The method of claim 2, The outer wall formwork, A first stage outer wall formwork 110 coupled to the upper surface of the temporary vent 130; A horizontal outer wall plate 124 formed in a shape capable of placing concrete on an upper side thereof is further provided at an upper end thereof, and includes a two-stage outer wall formwork 120 coupled to an upper surface of the first stage outer wall formwork 110; In step 7-2, Lifting the two-stage outer wall formwork 120, and lifting the first-stage outer wall formwork 110, characterized in that it comprises a step of lifting the bridge formwork. The method of claim 3, wherein The first stage outer wall formwork 110, Bridge formwork desorption method characterized in that it is installed so that at least two in the vertical direction depending on the height of the first stage concrete (320). The method according to any one of claims 1 to 4, The method of installing the vertical inner wall plate 210 in the second step (S30), A form-tie (212) is configured to couple to the outer wall formwork set 100 so as to be spaced apart from the inner surface of the outer wall formwork set 100 by a predetermined distance; The fourth step (S40), Removing the form-tie (212) after the bridge formwork detachment method, characterized in that configured to lift the vertical inner wall plate (210) to the outside. The method according to any one of claims 1 to 4, The first step (S10), Forming a bottom concrete (310) of a predetermined height in a space secured by the outer wall die set (100); In the second step (S20), System supporter (220), bridge form detachment method characterized in that the lower end is seated so as to be in close contact with the top surface of the bottom concrete (310). Two or more outer wall formwork sets (100) formed in an integral structure capable of withstanding horizontal and vertical loads, and coupled to the upper surface of the head head temporary facility (10) in a hollow structure to ensure a space for vertical concrete placement; An inner wall form set 200 coupled to an outer side of the outer wall form set 100 at a predetermined distance from the inner side; Multistage dies, characterized in that configured to include. The method of claim 7, wherein The outer wall die set 100, A temporary vent 130 configured to have a vertical height adjustable structure; At least one outer wall formwork configured to couple the vertical outer wall plates 111 and 121 and the horizontal beams 112 and 122; Multistage formwork, characterized in that configured to include. The method of claim 8, The outer wall formwork, A first stage outer wall formwork 110 coupled to the upper surface of the temporary vent 130; A horizontal outer wall plate 124 formed in a shape capable of placing concrete on an upper side thereof is further provided at an upper end thereof, and a two-stage outer wall formwork 120 coupled to an upper surface of the first stage outer wall formwork 110; Multistage formwork, characterized in that configured to include. The method of claim 8, The outer wall formwork, Both ends are coupled to the vertical outer wall plates (111, 121) and the horizontal beams (112, 122) to support the vertical outer wall plates (111, 121), the turn buckle for the bracing 114 is composed of a structure capable of adjusting its length 125); Multi-stage formwork characterized in that it further comprises. The method of claim 8, The vertical outer wall plates 111 and 121, Compared to the upper end, the lower end is a multi-stage formwork, characterized in that it is installed to be inclined closer to the vertical central axis of the head head temporary fixture (10). The method according to any one of claims 7 to 11, The inner wall formwork set 200, A vertical inner wall plate 210 coupled to an outer surface of the outer wall die set 100 to be spaced apart from the inner surface by a predetermined distance; A system supporter 220 manufactured to have a lower height than the outer wall formwork set 100 and positioned between the outer wall formwork sets 100; A horizontal inner wall plate 230 coupled to the top of the system supporter 220; Multistage formwork, characterized in that configured to include. The method of claim 12, The vertical inner wall plate 210, Multi-stage formwork, characterized in that coupled to the outer wall formwork set 100 by a form-tie 212 is spaced apart from the inner surface of the outer wall formwork set 100 by a predetermined distance. The method of claim 12, The system supporter 220, The multi-stage formwork, which can support a vertical load of a predetermined size or more, and is composed of a structure that can be combined and disassembled.

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