KR20050080400A - Bracket support type downward construction system and construction method using the same - Google Patents

Abstract

The present invention relates to a bracket supporting type down frame placing system and a method of placing down frame using the same, wherein the load of the concrete is pre-constructed during the construction of the underground structure while the concrete is being placed on the beam and slab formwork of the construction layer. Rather than a suspension and support system using a suspension material on an upper slab, a mobile support bracket fixed to a frame pillar and a support girder supported by a column by the mobile support bracket directly support the frame pillar. The present invention relates to a down frame pouring system of support type and a down frame pouring method using the same.

According to the present invention, it is possible to solve the conventional problems caused by the load of the lower concrete acts on the upper slab, and it is possible to construct the beam and slab of the lower layer irrespective of the construction state of the upper slab by the column support. There is an advantage that the shortening of the period is also possible.

Description

Bracket support type downward construction system and construction method using the same}

The present invention relates to a bracket supporting type down frame placing system and a method of placing down frame using the same, wherein the concrete load is applied to the beams and slab formwork of the construction layer when the underground structure is constructed using the unsupported reverse placing method. Rather than a system for suspending and supporting the upper slab pre-constructed as in the prior art by using a suspension material, a movable support bracket fixed to a frame pillar and a support girder supported by the pillar by the movable support bracket The present invention relates to a bracket supporting type down frame placing system for directly supporting a rough column and a method for placing down frame using the same.

In general, there are two ways to build underground structures.

In other words, after the earthquake work is made on the ground where the underground structure is constructed, the temporary erection method is installed to build up the structure from the bottom layer after installing the temporary facilities that can support the earthquake while excavating the ground, and then removing all the soil. It is the reverse casting method that constructs the structure by constructing the ground floor structure after constructing the ground floor and excavating the ground from the top to the bottom using the structure as a brace for the earth.

In recent years, underground construction has been intensifying in order to maximize land use. In particular, when the construction is carried out by the net pouring method, there are problems such as the risk of earthquake collapse and the occurrence of cracks due to settlement of nearby buildings. Due to the problem of lengthening the construction period, the reverse casting method has been developed and applied in recent years.

In the case of the reverse casting method, the construction of the underground structure and the ground structure can be carried out at the same time as the construction of the underground structure from the ground floor to the underground floor is possible, and the floor of the ground floor can be used as a workshop. There is no need for a perforated plate, and there is an advantage in that the below-mentioned plain formwork can be performed.

Such a reverse casting method involves placing concrete slabs and beams on the ground while the ground is stopped (concrete on grade), and excaving the ground to some extent, selecting the ground, and then placing the clubs and installing the formwork to place the concrete. Form on Supporting and the like are commonly used.

The method using the double barley is a method applied to strata with a relatively high relative density. The method is to excavate the ground, install concrete and formwork, and then cast concrete.

However, when the copper barrier is used, support on the soft ground is unstable and dismantlement is impossible unless the concrete strength of the upper floor is kept above a certain limit.

In addition, the temporary materials such as formwork, dongbari, etc. must be taken out of the gulto workshop and then moved back to the lower tier after installation, and this should be repeated for each floor construction. do.

In addition, after the concrete is poured, it is necessary to wait until the structure develops the steelmaking strength after sufficient curing period. Therefore, waiting time is inevitably generated, and the cost and time required for transporting and reassembling the copper bar or formwork are excessive. In addition to being economical, all work depends on manpower, which is labor intensive, which leads to problems such as difficulty in cost reduction in a situation in which labor force shortages intensify.

In order to solve the above problems, it is a Non Supporting Formwork System for Top Down construction, which is constructed from the ground floor to the lowest basement when building underground structures. Instead, an unsupported reversal suspension formwork was proposed to suspend the formwork on the concrete slab on the upper floor.

This non-reversible reversal suspension formwork is a method of constructing a lower slab by using the formwork while suspending the formwork using a suspension material on the upper slab.

In order to build the underground structure of each floor by using this method, concrete is laid on the formwork and the upper slab is pre-installed, and then the formwork used in the construction of the upper slab is lowered by using the hydraulic elevator located above the upper slab. Using the lowered formwork, the process of constructing the lower slab is repeated.

This suspension method is more advantageous in terms of securing a workplace and ensuring the safety of the worker, because the formwork is suspended by installing the formwork on the prefabricated floor slab without installing copper bar on the lower part of the slab. In addition, it is possible to achieve excellent concrete quality by securing sufficient curing period, and at the same time, there is an advantage of shortening the air and reducing the cost.

In particular, when the suspension method is applied, it is possible to simultaneously perform the three-stage process of underground frame construction, which continuously runs down the formwork suspended from the upper slab, the excavation work from the bottom, and the ground structure construction.

However, the suspension method, which was previously developed as a non-supporting method, had the following problems.

In the conventional suspension support method, when the formwork is lowered, the hydraulic elevator and the suspension are both supported by the upper concrete slab pre-installed, and the formwork suspended from the suspension is lowered and re-installed according to the height of the lower floor. This is done.

That is, the load of the concrete poured into the lower slab is a system supported by the upper slab pre-installed through the formwork and the suspension material.

As the load of the lower concrete placed on the formwork acts entirely on the upper slab, the excessive load on the upper slab can be applied. After all, the construction of the lower slab concrete is inevitably completed after the construction of the upper slab is completed in order to secure the structural stability to the maximum. It is possible.

Therefore, the problem of air delay due to the curing period of the pre-installed slab inevitably occurs, and therefore it is a fact that a method that can solve the problem of supporting the formwork to the upper slab is required.

In addition, in the suspension method, the lower end of the suspension material is fixed to the formwork at the slab position, which is suitable for the construction of the deck plate, which is increasingly used as an advantage of the unsupported construction that can be deleted. There was a problem that did not.

Therefore, the present invention has been invented to solve the above problems, the load of the concrete while the concrete is poured into the beam and slab formwork of the construction layer when building the underground structure, the suspension material on the upper slab pre-constructed as in the prior art A movable support bracket fixed to a frame pillar, not a suspension and support system using a bracket, and a bracket support type downward frame supporting directly to a frame pillar using a support girder supported by a pillar by the movable support bracket. By providing a pour system and a downward frame pouring method using the same, it is possible to solve the conventional problems caused by the load of the lower concrete on the upper slab, and to support the lower slab regardless of the construction status of the upper slab by column support. Construction is possible, and construction period can be shortened. As there is a purpose.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The present invention includes a continuous wall for mud walls, frame columns vertically fixed to the inner ground, beams and slab construction structures such as formwork, and means for supporting the beams and slab construction structures. In the down-frame pouring system for the construction of underground structures,

Means for supporting the structure for the beam and slab construction,

In each of the pillars 10 consists of two sets of sub-brackets that can be separated / combined with each other centering around the pillars 10, are bonded at the height of the floor to be installed and fixed to the pillars 10, A removable support bracket (100, 200) capable of moving on the column (10) upon separation; A horizontal connection is disposed between the two adjacent pillars 10 so that both ends thereof are supported by the respective movable support brackets 100 and 200, and the beams and slab construction structures 19, 20, and 21 are supported upward. Girder 300; characterized in that it comprises a.

On the other hand, in the downward frame placing method for constructing the underground structures such as beams and slabs from the ground floor to the lower ground floor,

Constructing a continuous wall for mud walls and constructing a frame pillar in the inner ground; Fixing the stopper means and the support brackets on the outer surface of each pillar and the inner surface of the underground continuous wall after the first ground excavation; Pressing and mounting the movable support bracket, which is movable in a fixed position, on each column according to the height of the beam and the slab and fixedly supporting the stopper means using the stopper means; Horizontally supporting and supporting a length steel support girder between two adjacent pillars in such a manner as to support an end portion over the movable support bracket and the support bracket of the underground continuous wall; Supporting and installing the beam and slab construction structures on the support girders; Drilling and curing concrete for beams and slabs and simultaneously excavating the lower ground and installing the stopper means on the column and the support bracket of the continuous wall at the lower level in the same way; Dismantling the movable support bracket after curing the concrete to a certain level and then descending the support girder to re-install the beam and slab construction structure at a lower level and to cast concrete; And by repeating the above steps to build a structure of the basement layer thereafter; characterized in that it comprises a.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

The present invention relates to a bracket supporting type down frame placing system and a method for placing down frame using the same. In particular, when the underground structure is constructed, the load of the concrete while the concrete is being placed in the beams and slab formwork of the construction layer is pre-installed. Rather than a system for suspending and supporting a single upper slab by means of suspension, a mobile support bracket which is fixedly supported on a frame pillar and a support girder which is supported by a column by the movable support bracket directly supports the frame pillar. There are those main features to one.

Thus, according to the present invention for supporting the formwork in the frame pillar, it is possible to solve the conventional problems caused by the lower concrete load acting on the upper slab.

The support bracket and the support girder of the present invention are a beam construction structure used for concrete pouring of a beam, that is, a beam formwork, and a slab construction structure used for concrete pouring of a slab, that is, a horizontal beam of horizontal support frame (Horry) Beam or long span (LS) formwork is directly supported by the fixed height from the framed column.

In the system of the bracket support type according to the present invention, the suspension material is used only for the simple lifting purpose of the support bracket and the support girder, not the use of the support means for supporting the structure for the beam and slab construction as in the prior art.

In addition, the portion in which the elevating suspension is fixed is not a slab formwork for supporting the slab construction structure as in the prior art, but the position can be fixed at a predetermined height in each column, but can be dismantled if necessary, so that The fixed height of the movable support bracket of the present invention can be adjusted to the construction layer height.

Therefore, the support girders, such as H-beams, arranged between the pillars are supported on the column-supported movable support brackets, the beam formwork is installed over the support girders, and the hori beam or the long span formwork is placed on the beam formwork. In addition to installation, when deck plates are simply installed and concrete is poured, the construction of deck slabs is also possible.

Hereinafter, with reference to the accompanying drawings will be described in more detail with respect to the down-frame pouring system of the present invention including a movable support bracket and a support girder pillar support.

The down-frame skeleton placing system of the present invention supports the beam formwork and the slab construction structure supported and installed on the beam formwork by using the temporary support structure of the column support when the concrete is laid in the beam and the slab to each structural column. In the above, there is a clear difference from the conventional non-supported suspension system, that is, the conventional suspension-free support system that supports the formwork on the upper slab pre-built using the suspension material.

Hypothetical structure of the present invention is horizontally arranged between the vertical pillars for the pre-constructed support girders to support the formwork from the lower side, and the support girder in the state fixed to a predetermined height on each of the pillars to support the formwork It includes a removable support bracket that can be adjusted in accordance with the height of the floor to be supported by and the height fixed on the column as needed.

First, the accompanying Figure 1 shows a bracket support type down-frame placing system of the present invention using a column support construction structure, in Fig. 1 S and G represent the slab and beam cast concrete, 19 is a beam formwork (Use of plywood and iron plate), in which the beam side plate is shown by reference numeral 19a, the support plate is indicated by reference numeral 19b, and the formwork frame is indicated by reference numeral 19c.

In addition, reference numeral 10 denotes a frame pillar to be installed after the construction of the underground continuous wall (1) for earthquake, the movable support bracket (100,200) of the present invention on the column (10) floor beam (G) and slab ( Positioned and fixed at a predetermined height in accordance with the height of S), the support girder 300 of the present invention is supported by the movable support bracket (100,200) to the upper side, the support girder 300 is the formwork 19 And other structural slab concrete castings (in the FIG. 1 implemented as hori beams) supported by this formwork 19.

In general, H-shaped steel is generally used as a frame pillar 10 for construction of underground structures, but in FIG. 1, a composite steel pipe pillar filled with concrete in a circular steel pipe instead of H-shaped steel, that is, CFT (Concrete Filled Steel) Tube) It shows an example where the column is installed, and this CFT column can be used as a base structure by constructing reinforcement and concrete around it.

In addition, reference numeral 300 denotes a support girder and reference numerals 100 and 200 denote a movable support bracket, of which the support bracket 100 is used as a first embodiment for a two-way slab system. An assembly support bracket is shown, and the support bracket 200 denotes a removable support bracket usable for one-way slab systems as a second embodiment.

Here, the assembled support bracket 100 and the detachable support bracket 200 according to the present invention is one of the two selectively applied depending on the actual slab system, but Figure 1 shows that it is shown together for convenience.

The support girders 300 are horizontally disposed between the vertical columns 10 for the frame to support the beam formwork 19 in a state supported by the movable support brackets 100 and 200 fixed to the respective pillars 10. As a horizontal length steel, it can be implemented with steel beams of H-shaped steel or truss type.

The movable support brackets 100 and 200 are fixed on the pillars 10 to support the upper support girders 300. In particular, the movable support brackets 100 and 200 have a lifting bar 17 for lifting. It is provided to be fixed.

The movable support brackets 100 and 200 have a tightening friction force acting on the circumferential surface of the pillar 10 in a state in which the circumferential surface of the pillar 10 is compressed, and a stopper means protruding on the circumferential surface of the pillar 10. By 15, the upper and lower positions of the column 10 can be fixed at a predetermined height.

In particular, as described below, the movable support brackets 100 and 200 have a structure that can be dismantled from the column 10, and when the suspension member 17 is lowered to the hydraulic elevator 18 in a state dismantled from the column 10. The movable support brackets 100 and 200 are also lowered while the suspension member 17 descends smoothly under the slab S through the through hole S 'provided at the position of the slab S around the beam G. .

In this way, when the support brackets 100 and 200 are lowered, the upper support girders 300 are lowered together. Thus, the beam formwork 19 and the slab construction structure (hori beam 21 or long span formwork, etc.) that were used previously are used. Can be lowered down and reinstalled.

On the other hand, with reference to the accompanying Figures 2 to 14 will be described in more detail with respect to the support girders and support brackets that are the means of the present invention for supporting the temporary structure, that is, the structure for the construction of beams and slabs employed in the construction system of the invention Is as follows.

First, Figures 2 to 6 show a first embodiment of the support bracket according to the present invention, which shows an assembled support bracket usable for a two-way slab system.

Figure 2 is a plan view showing the assembled support bracket of the present invention, Figures 3 and 4 is a perspective view showing the assembled support bracket of the present invention, Figure 4 of the well shows the divided state.

5 is a perspective view showing a pillar supporting state of the assembled support bracket and the support girder according to the present invention, Figure 6 is an enlarged perspective view showing the clamping state of the assembled support bracket and the support girder of the present invention.

Reference numeral 10 denotes a CFT column filled with concrete, reference numeral 300 denotes a support girder (conducted from H-shaped steel) disposed between the other pillars 10, and reference numeral 15 denotes a column 10 of the column 10. The stopper means provided on the surface is shown.

As shown, the assembled support bracket 100 is configured to support the support girder 300 from below, and in particular, two sub brackets 100a, which are joined or divided along a diagonal (or divided) line in a diagonal direction. 100b), two crimping portions 120a and 120b positioned at the upper and lower portions of the center in the state where the two sub brackets 100a and 100b are combined with each other are arranged on the upper and lower circumferential surfaces of the column 10. Simultaneous crimping is performed from the lower side.

Looking at the configuration in detail, each of the sub-bracket (100a, 100b) is a horizontal upper support plate 110 of the 'b' shape that supports the end of the support girder 300 while the lifting suspension 17 can be fixed ), Two semicircular pressing plates 122 and 124 disposed up and down at the center position of the coupled state to squeeze the upper and lower outer surfaces of the column 10, and each corner side and the center of the upper supporting plate 110. Inverted triangular support structure by connecting the three upper vertical plate 130 for supporting the upper pressing plate 122 and the lower pressing plate 124 of the center at the outer end of each of the upper vertical plate 130 It is configured by integrating the three support frame 140 to form a.

In the assembled state, each of the semi-circular pressing plates 122 and 124 of the sub brackets 100a and 100b is combined with the corresponding semi-circular pressing plates of the opposite sub-brackets so as to compress the circumferential surface of the column 10 on both sides. The pressing parts 120a and 120b are formed.

Here, three separate lower vertical plates 126 are installed on the lower pressing plate 124, and each lower vertical plate 126 has a structure in which a lower end of the supporting frame 140 is fixed. The support frame 140 has a structure in which an upper end thereof is fixed to the upper vertical plate 130 and a lower end thereof is fixed to the lower vertical plate 126.

Here, as illustrated in the drawings, two support frames 140 disposed in the 180 ° direction are one angle frame, and the support frames 140 disposed in the 90 ° direction therebetween have two support frames. It consists of two angle frames.

In addition, a lower end of the suspension member 17 is fixed to the upper support plate 110 by the fastener 17a. As shown, two suspension materials 17 are symmetrical to each other on one upper support plate 110. Is fixed in position.

Of course, in the present invention, the suspension material 17 is used as a simple lifting purpose of the bracket 100 and the support girders 300, rather than the use of the support for the concrete load as briefly mentioned above, so that the concrete pouring of the construction layer is It is not necessary to provide a large bearing force against the concrete load to the top of the suspended material 17 during the construction, and in the end it is possible to use a lifting device that can provide a relatively small bearing force in addition to the hydraulic elevator (this is also the case with the removable support bracket described later). being).

On the other hand, as a preferred embodiment, between the upper vertical plate 130 of each of the sub-brackets (100a, 100b) is provided with a separate horizontal reinforcement plate 150 disposed in parallel with the upper support plate 110, the A vertical reinforcement plate 160 is installed between the upper support plate 110 and the horizontal reinforcement plate 150 to configure the bracket structure to sufficiently withstand the load transmitted through the support girder 300 without overall deformation.

In addition, the outer surface of the two upper vertical plates disposed in both 180 ° directions of the three upper vertical plates 130 are to be bonded to the corresponding surface of the upper vertical plate 130 of the opposite sub bracket during assembly, At this time, the two upper vertical plates 130 of both sides joined are fastened to each other by bolts 132 and 134 at both ends thereof and fixed to each other.

And, as in the upper vertical plate 130, when the outer shaving assembly of the two lower vertical plates 126, which are disposed in both 180 ° direction is to be bonded to the corresponding surface of the lower vertical plate 126 of the opposite sub-bracket, At this time, the two lower vertical plates 126 joined to each other are fastened by bolts 128 and fixed to each other.

In addition, the two support frames 140 disposed in the 180 ° direction are fastened to each other by bolts 142 at the appropriate positions with the corresponding support frames 140 of opposite sub-brackets, respectively, during assembly.

Here, the number of boltings for each part between the two sub-brackets (100a, 100b) on both sides is a plurality, in the embodiment of the example bar one bolt fastening point in the center of the support frame 140, but the number and position Changes can be made as appropriate.

In addition, the stopper means 15 are provided on the circumferential surface of the pillar 10 so that the assembly of the two sub brackets 100a and 100b, that is, the combined support bracket 100 can be firmly positioned on the pillar 10. The protrusions are provided to protrude, and preferably, four protruding plates 15a having a predetermined thickness are welded on the circumferential surface of the column 10 at equal intervals in the circumferential direction.

Each of the protruding plates 15a serves as a locking jaw supporting the lower pressing plate 124, and the two lower presses compressing the circumferential surfaces of the pillars 10 while the two sub brackets 100a and 100b are assembled. The plate 124 is caught downward and fixed.

And, in the temporary structure of the present invention that is a means for supporting the structure for building the beam and slab, the movable support bracket 100 and the support girder 300 is the upper support plate 110 and the upper support plate 110 of each sub bracket. The overlapped portions of the ends of the support girders 300 supported upwards are clamped by the plurality of clamps 400 so as not to move with each other.

That is, as shown in FIG. 6, the H-shaped steel used as the support girder 300 is supported above the upper supporting plate 110 of the sub bracket, and the lower plate of the H-shaped steel and the upper supporting plate of each sub bracket. The overlapped parts are clamped and fixed to each other by the clamp 400 at a plurality of positions.

Thus, the structure of the clamp 400 which mutually fixes a support bracket and a support girder is similarly employ | adopted in the removable support bracket mentioned later.

As a result, the assembled support bracket 100 of the present invention forms the inverted pyramid support structure as a whole in a state in which the pillar 10 is assembled in the center, and is firmly fixed on the circumferential surface of the pillar 10. Support the support girders 300 to the upper side.

In addition, each of the upper support plates 110 supporting the support girders 300 in the two sub brackets 100a and 100b forms a square support plate having an open center in a combined state, and the opening 112 It is possible to penetrate the reinforcing bar 22 through the (), and also to facilitate the formwork and reinforcing work of the reinforced concrete column (CFT column is built) as the periphery of the CFT column (10).

Of course, the area of the opening 112 to form the upper support plate 110 on both sides is compared with the cross-sectional area of the reinforced concrete column, which is constructed by placing concrete 23 after the rebar 22 is constructed around the CFT column 10. It should be loud.

On the other hand, each of the assembled support brackets 100 can be separated from each other along the dividing line in the diagonal direction, bar two sub-brackets (100a, 100b) after loosening the bolts that are fastened to each other sub-bracket (100a) ) By removing and lowering the sub-bracket 100b on the other side from the column 10 while supporting the suspension with the suspension 17, and the formwork can be disassembled in units of 1 panel (= 1 span × 1 span). This is as shown in FIG.

Figure 7 shows how the support girders are laid out and sequentially lowered in a two-way slab (or two-way deck slab) in a plain beam formwork system. Representing a plurality of support girders (consisting of H-shaped steel) intersected on the same plane with both ends supported on the upper support plate 110 of the bracket 100, and reference numeral 17S denotes a primary movable suspension ( Jacking Bar) and reference numeral 17N denote a non-movable suspension material.

As shown, since the assembled support bracket 100 of the present invention can be separated along a dividing line in a diagonal direction with respect to the CFT column 10, each sub bracket 100a and 100b positioned within the first down section. ) And the support girders 300 by simultaneously lowering the panel formwork can be dismantled by one panel unit.

8 to 13 show a second embodiment of the support bracket according to the present invention, which shows a detachable support bracket usable for a one-way slab system.

8 to 10 is a perspective view of the removable support bracket of the present invention, of which Figs. 8 and 10 show the divided state well, and Fig. 11 is a removable support bracket and a support girder according to the present invention. Is a perspective view of the pillar support state.

Reference numeral 10 denotes a CFT column, and reference numeral 300 denotes a support girder disposed between the other pillars 10 and the surroundings.

In addition, reference numeral 17 denotes a hanging bar connected to and fixed to the upper support plate 210, and reference numeral 15 denotes a stopper means installed to protrude on the circumferential surface of the column 10.

As shown, the removable support bracket 200 is configured to support the support girders 300 from the lower side, and in particular, can be fixed to each other by a plurality of bolts 238 and disassembled when the bolts 238 are released. Composed of two sub brackets (200a, 200b), the bar 238 is fastened by the two sub-brackets (200a, 200b) is assembled with each other, the pressing plate 220 in the center of the column (10) The main surface is pressed on both the left and right sides, and in the compressed state, the upper and lower positions thereof are fixed by the stopper means 15 fixed on the column 10 in the same manner as the assembled support bracket.

Looking at the configuration in detail, each of the sub-brackets (200a, 200b) has an upper support plate 210 for supporting the end of the support girders 300, while the lower end of the lifting suspension 17 for lifting and Two vertical side plates 230, which are fixed side by side to the lower side of the support plate 210 to form both sides of the sub-bracket and the bolt fastening portion 232 to be bolted after overlapping with the other side when combined, and the lower side of the upper support plate 210 And a compression plate 220 fixed between the two side plates 230 to squeeze one side of the outer surface of the pillar, and a bottom plate 240 fixed between the two side plates 230 to form a bottom surface of the sub bracket. do.

Here, the pressing plate 220 is a circular curved plate capable of pressing one side of the circumferential surface of the circular cross-section pillar 10.

The upper support plate 210 of each of the sub brackets 200a and 200b is fixed to the lower end of the suspension member 17 by the fastener 17a, and each sub bracket 200a and 200b is lowered to the upper support plate 210 when descending. It is intended to be supported by the suspending member 17 connected to it.

Preferably, a plurality of vertical reinforcing plates 252 and 254 are arranged to be fixedly intersected between the upper support plates 210 and the bottom plates 240 of the sub brackets 200a and 200b so that the bracket structure is entirely deformed. It is configured to withstand the load transmitted through the support girder 300 sufficiently.

That is, the side reinforcement plate 252 and two side plates 230 which are disposed side by side with the side plate 230 and fixed together on the outer surface of the pressing plate 220 and the opposing surface of the upper support plate 210 and the bottom plate 240, respectively ) And a longitudinal reinforcement plate 254 which is horizontally arranged and fixed to the opposite surfaces of the upper support plate 210 and the bottom plate 240 and the side plates 230 and the horizontal reinforcement plate 252 together.

In addition, the stopper means 15 are provided on the circumferential surface of the pillar 10 so that the assembly of the two sub brackets 200a and 200b, that is, the combined support bracket 200 can be firmly positioned on the pillar 10. The protrusions are provided to protrude, and preferably, four protruding plates 15a having a predetermined thickness are welded on the circumferential surface of the column 10 at equal intervals in the circumferential direction.

Each of the protruding plates 15a serves as a locking jaw for supporting the pressing plates 220. The two pressing plates 15 compress the circumferential surfaces of the pillars 10 while the two sub brackets 200a and 200b are assembled. 220 is fixed to the lower side.

In addition, as in the assembled support bracket, the support bracket 200 and the support girder 300 are formed at the ends of the upper support plate 210 of each sub bracket and the end of the support girder 300 supported above the upper support plate 210. The overlapped portions are clamped by a plurality of clamps 400 so that they are fixed so as not to move with each other.

That is, in a state in which the H-beam used as the support girder 300 is supported above the upper support plate 210 of the sub bracket, the overlapped portion of the lower plate of the H-beam and the upper support plate 210 of each sub bracket is The clamps are fixed to each other by the clamp 400 in a plurality of positions.

In addition, the bolt fastening portion 232 is an overlapping portion of the end of both side plate 230 that is bolted to the opposite sub bracket in each sub bracket (200a, 200b), the bolt 238 is fastened to this overlapping portion It is a part formed by forming a structure that can be.

That is, when the inner circumferential surface of each pressing plate 220 is in close contact with the circumferential surface of the column 10 in one set of sub brackets 200a and 200b, the end portions of both side plates 230 of one sub bracket are connected to the other sub bracket. It is configured to overlap with the end portion of the same side plate to a certain degree, the plurality of fastening holes 234 are formed to be arranged up and down in the overlapping portion of the sub-bracket 200a overlapping inward, and overlap the outer side of the sub-bracket 200b In the overlapping portion, a plurality of cutting grooves 236 matched with the respective fastening holes 234 are formed to be disposed up and down.

When assembling the two sub brackets 200a and 200b, the inner circumferential surfaces of the pressing plates 220 of the respective sub brackets are brought into close contact with both circumferential surfaces of the pillars 10, and the bolt coupling portions 232 of the respective sub brackets overlap each other. After closely contacting each other, the bolt 238 is inserted into and fastened to the fastening hole 234 and the cutting groove 236.

At this time, by forming a fastening structure of a predetermined length of notched groove in the bolt fastening portion 232 of the sub-bracket 200b overlapping to the outside, the bracket combination and detachment / attachment can be more easily, preferably Rather than forming the cutaway groove 236 in a straight line shape, it is advantageous to form a cut in stepped shape at each end of the side plate 230 as illustrated, so that a more robust combination state is maintained.

As a result, the detachable support bracket 200 as described above is firmly fixed on the circumferential surface of the pillar 10 in a state of being supported by the stopper means 15 in a state in which the pillar 10 is assembled in the center, and thus fixed state. Support the support girders 300 to the upper side.

The removable support bracket 200 has a tightening friction force acting on the circumferential surface of the pillar 10 in a state in which the circumferential surface of the pillar 10 is compressed in the same manner as the assembled support bracket 100 described above, and the pillar ( The upper and lower positions are fixed at a predetermined height on the column 10 by the stopper means 15 provided to protrude on the circumferential surface of 10).

On the other hand, Figures 12 and 13 show a removable support bracket that can be applied when using a conventional H-shaped steel (10a) rather than the above-described CFT pillar as a frame pillar, the cross section of the H-shaped steel (10a) The detachable support bracket 200 in which the shape of the pressing plate 220 is modified to fit the shape is well illustrated.

Deformation of the removable support bracket 200 is generally the same as the structure described above, but the shape of the pressing plate 220 is configured to be changed to a vertical flat plate that can be bonded to the outer plane of the H-shaped steel (10a), the stopper means 15 is constructed by welding two protruding plates 15a having a predetermined thickness, one on each of two outer planes of the shaped steel 10a.

On the other hand, the removable support bracket 200 is to be separated on both sides around the pillar 10, the two sub-brackets (200a, 200b) after loosening the bolts (238) fastening to each other after one side of the sub-bracket In the state in which the support 200a is supported by the suspension member 17, the formwork can be dismantled by removing and lowering the sub bracket 200b on the other side from the column 10, as shown in FIG. 14.

Fig. 14 shows how the support girders are laid out and sequentially lowered in a one-way slab (or one-way deck slab) in a plain beam formwork system, where reference numeral 300 denotes two adjacent detachable supports supported by the column 10. Representing a plurality of support girders (consisting of H-shaped steel) arranged side by side with both ends supported on the upper support plate 210 of the bracket 200, reference numeral 17S denotes a primary movable suspension (Jacking Bar), Reference numeral 17N denotes a non-movable suspension material.

As shown in the drawing, the sub-brackets 200a and 200b and the support girders 300, which are positioned in the down section, are first lowered around the CFT column 10, so that stepwise dismantling of the formwork is possible.

Meanwhile, some of the support girders 300 supported by the support brackets 100 and 200 of the first and second embodiments have one end thereof on a wall for walling (for example, CIP Pile (Cast In Place Pile); 1). To be supported, a separate support bracket for this is shown in Figures 1 and 15c-15g.

As shown, the support bracket 16 of the inverted triangular structure for each floor is fixedly installed on the inner surface of the retaining wall 1 so that one end of the support girder 300 is supported thereon, wherein the support girder 300 The opposite end of) is supported above the support bracket 100 of the present invention as described above.

The support bracket 16 fixed to the retaining wall 1 can be installed by welding.

Hereinafter, a method for constructing an underground structure by using the above-described down frame pouring system of the present invention will be described.

First, as shown in FIG. 15A, underground continuous walls (for example, composed of CIP files) 1 for earthquakes are constructed around the periphery of the ground on which the underground structure is to be constructed.

Subsequently, as shown in FIG. 15B, a pit 2 for installing the steel frame 10 for building frames is drilled in the inner ground of the continuous wall 1, and for each pit 2 a frame pillar ( 10) planted and fixed.

Here, in the case of installing the CFT pillar as the frame pillar 10, an upper press-fit method of press-filling concrete at the top of the pillar using the filling pipe 12 may be used.

That is, a circular steel pipe column 11 into which the filling pipe 12 is inserted to the inner lower side is installed inside each of the gangs 2 which are vertically perforated in advance, and then, even inside the gang 2, the outside of the steel pipe column 11. Fill the rubble (eg, 40mm or more crushed stone; 13) over the blocking plate 11a installed on the surface, and then fill the rubble (eg, 40 mm or more; 13), and then, through the upper inlet of the filling pipe 12, with the pump car, The base space 14 and the pillar filling concrete is to be filled and poured.

At this time, the concrete injected through the upper inlet of the filling pipe 12 is filled first to the base space 14, and then the filling is made from the bottom up inside the steel pipe column (11).

In this way, after the concrete is cured, the concrete composite steel pipe pillars, that is, the CFT pillars 10 filled with concrete inside the steel pipe pillars 11 are completed, and the CFT pillars 10 are filled concrete due to the restraint effect of the steel pipes. It has high member strength and excellent deformation performance due to the increase of the bearing capacity and the local buckling reinforcement effect of the steel pipe by the filled concrete.

Therefore, when the CFT column is applied, it is possible to reduce the column cross-sectional area or increase the column spacing, so that the effective space can be easily secured, and the column rigidity is increased compared to general structures such as H-shaped steel.

Next, after finishing the construction of the CFT pillar 10 as described above, as shown in Fig. 15c, the ground is excavated primarily to take out the soil.

Then, the temporary structure of the present invention including the movable support bracket 100 and the support girder 300 is fixedly installed to the CFT column 10 constructed above, and the beams and slabs of the ground layer are installed on the temporary structures 100 and 300. Install the structure for construction.

That is, the stopper means 15 are first installed on each pillar 10, and the movable support brackets 100 are fixed on the corresponding pillars 10 according to the heights of beams and slabs to be constructed, thereby stopping the stopper means 15. And a separate support bracket 16 is fixedly installed on the inner surface of the underground continuous wall 10, and then the support girders 300 between the peripheral pillars 10 are properly disposed on the brackets 100 and 16. To support it.

Of course, the movable support bracket 100 is fixed to the suspension member 17 for the time of descent, at this time, each of the suspension member 17, the upper portion of each sub bracket (refer to 100a, 100b in Figure 3) Secure the connection to the backing plate (shown at 110).

The installation, assembly and disassembly of the support bracket 100 and the support girder 300 have been described above with reference to the construction system of the present invention. Therefore, the detailed description thereof will be omitted in the description of the construction method, and the support girder ( The arrangement of the 300 is also as shown in FIGS. 5 and 7 and 11 and 14.

Here, the suspension material 17 can be used as a reinforcing bar or a circular bar, the support girder 300 can be implemented as a steel beam of H-shaped steel or truss type.

At the time of installation of the beam and slab construction structure, the beam formwork 19 including the beam side plate 19a and the bottom plate 19b and the formwork support frame 19c as the beam construction structure is first supported on the support girder 300. 16a and 16b are supported, and the slab construction structure (for example, the truss deck 20) is supported by the above-mentioned formwork 19 and installed.

At this time, the beam side plate (19a) uses a steel plate of a relatively thin thickness than the plate (19b), after which the stud bolt (19d) or reinforcing bar on the inner surface to be inserted into the interior of the concrete to be poured Weld (19e) to protrude and install.

As the reinforcing bar 19e, one made of 'c' shape may be used, and both ends of the reinforcing bar 19e may be fixed by welding to the inner side of the beam side plate 19a.

In addition, the retaining plate (19b) can be used plywood, the formwork support frame (19c) is used as a single assembly of a plurality of wood or BOX steel pipe as usual.

As the slab construction structure, a hori beam (manufactured by Japan Horry Co., Ltd.), which is well known to those skilled in the art, can be used as a horizontal support frame.

In the case of using the hori beam, after installing the beam formwork 19, install a hori beam in each inter-beam beam formwork, install the plywood over the hori beam and then cast concrete to build the slab.

In addition, it is also possible to use a long span (LS) formwork as the structure for building the slab, in particular, the use of the deck plate (Deck Plate) is increasingly used as an advantage of the non-bogie construction that can be deleted the formwork. .

15C to 15G illustrate an example of using a truss deck 20 as a slab construction structure.

As is well known, the truss tech 20 is a product manufactured by integrating a steel structure of a truss structure having a high yield strength and a plurality of reinforcing bars for reinforcing the steel structure in a galvanized steel sheet, in particular in the concrete for slab It is a commercial product that is synthetically constructed to play a part structural role.

Therefore, when the truss deck 20 as the slab construction structure is installed over the support formwork 19 supported by the support girders (consisted of H-shaped steel; 300), when the concrete is poured in a subsequent process, the deck slab ( Construction of Deck Slab is possible.

Next, after the beam formwork 19 and the slab construction structure 20 are installed as described above, concrete is laid as shown in FIG. 15D to construct the beam and slab structures of the strata, and at the same time, Proceed with the excavation work to build the structure of the first basement level.

Then, a new stopper means 15 is newly installed on the circumferential surface of each column 10 according to the height of the structure of the basement 1 floor, and a new support bracket 16 is newly installed on the inner surface of the underground continuous wall 1. Carry out preliminary work.

Subsequently, after the concrete of the pre-constructed strata is cured to some extent, the bolts connecting the respective sub-brackets are released to dismantle the movable support bracket 100 from the column 10, and using the hydraulic elevator 18. After demolding the formwork by lowering the support bracket 100 suspended from the suspension material 17, they are reinstalled in the same manner as the ground floor to meet the height of the first basement as shown in FIG. 15E.

When the support bracket 100 descends, the upper support girder 300 descends together, and the beam formwork 19 and the slab construction structure (hori beam or long span formwork, etc.) used previously are lowered to the lower floor thereof. You can reinstall it.

Of course, even when using the truss deck 20 can be installed in the same manner as described above.

After dismantling of the movable support bracket 100, the lowering with the support girders 300 and in the process of reinstalling the beam and slab construction structure (19, 20) at a lower level, shown in detail in Figures 16a and 16b As shown (a support bracket below the support girder is omitted), the beam side plate 19a is constructed by a stud bolt 19d or a reinforcing bar 19e inserted into and fixed into the concrete of the prefabricated upper beam G. It is to be fixed on the side of the upper beam (G), and the bottom plate (19b) and the formwork support frame (19c) is moved together when the support girders (300) descends and reinstalled with a new beam side plate at the lower floor height. .

In the present invention, the suspension material 17 is used only for the simple lifting purpose of the bracket and the support girder, and not for the purpose of supporting the concrete load as conventionally.

Thus, in the present invention, in addition to the use of the hydraulic elevator 18 illustrated in the drawing as the upper end of the suspension, it is also possible to use a chain block.

After the beam formwork 19 and the slab construction structure 20 are installed as described above, concrete is laid as shown in FIG. 15F to construct the beam and slab structure of the basement 1 floor, and at the same time, Proceed with the excavation for the construction of the structure on the second floor.

Subsequently, the beams and slabs of the basement 2 and its lower floors are constructed in the same way, and as shown in FIG. 15g, after the final layer is excavated, the foundation concrete is poured, and the wall, core and lamp ( Fine powders such as Ramp) are smoothly constructed from the lower floor.

Of course, the construction of the micro-powder such as walls, cores, lamps, etc. can proceed during the construction of beams and slabs of the lower floor if the beam and slab construction of the floor is completed, and the formwork and reinforcement work of the CFT column 10 In addition, the construction of ground structures can be performed simultaneously.

As described above, according to the bracket supporting type down frame placing system and the down frame placing method using the same, the load of the concrete during the construction of the underground structure during the construction of the beams and slab formwork In the structure of the upper layer slab pre-constructed as in the past, not by the suspension and support method, but by using a movable support bracket fixed to the pillar for the frame and a support girder supported by the pillar by the movable support bracket By supporting the construction directly on the column, there are the following advantages.

1) The present invention is a system in which the concrete load of the lower slab is supported by the column, it is possible to prevent the excessive load applied to the upper slab as in the prior art.

2) In the present invention, the suspension material is not used to directly support concrete loads as in the prior art, but is used only for the simple lifting and lowering of the bracket and the support girder, so that the lower beam and the slab can be constructed regardless of the construction state of the upper slab. And, even before the concrete is completely cured, there is an advantage that the construction of the lower floor is possible. That is, the construction period can be greatly shortened.

3) Unlike the conventional suspension method of supporting and lowering the slab formwork by the suspension material, the beam and slab construction structure is directly supported by the pillars, and the connection part of the suspension material, which is for simple lifting, is used as the structure. Since the bracket of the present invention to support them, there is an advantage in the use of the truss deck (Truss Deck), the use of which is increasing as an advantage of the construction can be removed the formwork frame.

1 is a use state diagram showing a bracket support type system according to the present invention,

2 is a plan view showing the assembled support bracket of the present invention,

3 and 4 is a perspective view of the assembled support bracket of the present invention,

5 is a perspective view showing a pillar supporting state of the assembled support bracket and the support girder according to the present invention,

6 is an enlarged perspective view illustrating a clamping state of the assembled support bracket and the support girder of the present invention;

7 is a plan view showing a state in which the support girder of the present invention is disposed in the plain beam formwork system of a two-way slab;

8 to 10 is a perspective view showing a removable support bracket of the present invention,

11 is a perspective view showing a pillar support state of the removable support bracket and the support girder according to the present invention;

12 and 13 are a perspective view showing the removable support bracket and the mounting state of the present invention that can be applied when using the H-shaped steel as a frame pillar,

14 is a plan view showing a state in which the support girder of the present invention is disposed in the plain beam formwork system of one-way slab;

15a to 15g is a process chart for explaining the downward skeleton placing method according to the present invention,

16A and 16B are views showing a state in which the beam formwork is supported and lowered by the support girder during the frame placing process of the present invention.

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

1: underground continuous wall 10: CFT pillar

15: stopper means 15a: protruding plate

16: support bracket 17: suspension

18: hydraulic lift 19: beam formwork

20: Truss Deck 21: Horry Beam

100: assembled support bracket 100a, 100b: sub bracket

110: upper base plate 122, 124: semi-circular pressing plate

126: lower vertical plate 130: upper vertical plate

140: support frame 200: removable support bracket

200a, 200b: sub bracket 210: upper support plate

220: press plate 230: side plate

232: bolt connection 234: tightening hole

236: incision groove 240: bottom plate

Claims (24)

Underground structure construction including a continuous wall for mud walls, frame columns vertically settled in the ground underground, structures for beam and slab construction such as formwork, and means for supporting the structure for beam and slab construction. In the down frame pouring system for Means for supporting the structure for the beam and slab construction, In each of the pillars 10 consists of two sets of sub-brackets that can be separated / combined with each other centering around the pillars 10, are bonded at the height of the floor to be installed and fixed to the pillars 10, A removable support bracket (100, 200) capable of moving on the column (10) upon separation; A horizontal connection is disposed between the two adjacent pillars 10 so that both ends thereof are supported by the respective movable support brackets 100 and 200, and the beams and slab construction structures 19, 20, and 21 are supported upward. Girder 300; Bracket support type down skeleton pouring system comprising a. The method according to claim 1, The movable support brackets (100, 200), Each of the sub brackets may support upper end plates 110 and 210 to support the ends of the support girders 300, and press plates 122, 124 and 220 that are pressed together while wrapping the outer surfaces of the pillars 10 when they are coupled to each other. The presser plates 122, 124, and 220 are caught by the stopper means 15 fixed to protrude to the outer surfaces of the pillars 10, and the stopper means 15 together with the tightening frictional force of the press plates 122, 124, and 220. Bracket support type down frame pouring system characterized in that the up and down position is fixed by. The method according to claim 2, The two sub brackets 100a and 100b are joined together by bolts after being joined to each other along a joining line in a diagonal direction with respect to the pillar 10, and the respective sub brackets 100a and 100b are suspended and suspended for the lifting material 17. 'B' shaped horizontal upper support plate 110 supporting the end of the support girder 300 and the upper and lower outer sides of the column 10 are disposed up and down at the center position of the coupled state Two semi-circular pressing plates 122 and 124 for pressing the surface, three upper vertical plates 130 for connecting and supporting the upper pressing plate 122 at the corners and the center of the upper supporting plate 110, and the respective angles. Downward of the bracket support type, characterized in that the three support frame 140 is formed by connecting the lower pressing plate 124 in the center at the outer end of the upper vertical plate 130 to form an inverted triangular support structure. Framed pour system. The method according to claim 3, Each of the sub-brackets 100a and 100b is a reinforcement plate, and a horizontal reinforcement plate 150 disposed in parallel with the upper support plate 110 between the upper vertical plate 130, and horizontally with the upper support plate 110. Bracket support type down frame pouring system characterized in that it has a vertical reinforcement plate 160 installed between the reinforcement plate (150). The method according to claim 3, Each sub bracket (100a, 100b), Of the three upper vertical plates 130, two upper vertical plates on both sides joined to each other in the state where the outer surfaces of the two upper vertical plates disposed in the 180 ° direction are joined to each other by a plurality of bolts 132 and 134 at both ends thereof. Downward of the bracket support type, characterized in that the two support frames which are arranged in the 180 ° direction of the three support frame 140 is fastened with the corresponding support frame and bolt 142 of the opposite sub bracket, respectively. Framed pour system. The method according to claim 3, The lower pressing plate 124 is provided with three separate lower vertical plates 126, the lower end of the support frame 140 is fixed to each of the lower vertical plates 126 of the bracket support type, characterized in that Down-framed pour system. The method according to claim 6, The lower vertical plates 126 of each of the sub brackets 100a and 100b are arranged in 180 ° directions, and the two lower vertical plates 126 are joined to each other by a plurality of bolts 128 after their outer surfaces are bonded to the corresponding lower vertical plates of the opposite sub brackets. Bracket support type down frame pouring system, characterized in that fastening. The method according to claim 2, The two sub brackets 200a and 200b are coupled to each other by being bolted to each other after overlapping a predetermined portion at both sides with respect to the pillar 10, and the respective sub brackets 200a and 200b are fixed to the lifting suspension 17. The upper support plate 210 that can support the end of the support girder 300 and the side of the upper support plate 210 is fixed side by side to form both sides of the sub-bracket and the bolt to be bolted after overlapping with the other side when combined Two vertical side plates 230, the fastening portion 232 is formed, and the pressing plate 210 is fixed between the lower side of the upper support plate 210 and the two side plates 230 to compress one side of the outer surface of the column 10 and And a bracket supporting type downward skeleton placing system, characterized in that the bottom plate 240 is fixed between the two side plates 230 to form a bottom surface of the sub bracket. The method according to claim 8, The pressing plate 220 is a bracket support type downward skeleton pour system, characterized in that the circular curved plate capable of pressing one side of the circumferential surface of the circular cross-section pillar (10). The method according to claim 8, Bracket support type down frame placing system characterized in that the pressing plate 220 is a vertical plate capable of pressing the outer plane of the H-beam pillar (10a). The method according to claim 8, Each of the sub-brackets 200a and 200b has a plurality of vertical reinforcement plates 252 and 254 which are installed as a reinforcement plate and intersected in the vertical and horizontal direction between the upper support plate 210 and the bottom plate 240. Type downward skeleton pour system. The method according to claim 8, The bolt fastening part 232 is configured by forming a structure in which the bolt 238 can be fastened to an overlapping portion of both side plates 230 in which the sub brackets 200a and 200b overlap between the two sub brackets. A plurality of fastening holes 234 are formed to be disposed up and down in the overlapping portions of the sub brackets 200a overlapping with each other, and a plurality of matching holes for each of the fastening holes 234 in the overlapping portions of the sub brackets 200b overlapping outwards. Bracket support type down frame pouring system characterized in that it is formed to be arranged up and down the two cut grooves (236). The method according to claim 12, Bracket support type down frame pour system, characterized in that the incision groove 236 is stepped shape at each end of the side plate (230). The method according to claim 2, The stopper means (15) is a bracket supporting type downward frame, characterized in that the four protruding plates (15a) having a predetermined thickness on the circumferential surface of the circular cross section column (10) are arranged at equal intervals and welded in the circumferential direction. Pour system. The method according to claim 2, The stopper means (15) is a bracket support type down frame placing system characterized in that the two protruding plates (15a) having a predetermined thickness by welding to each outer plane of the H-beams (10a) one by one. The method according to any one of claims 1 to 15, The movable support brackets 100 and 200 and the support girders 300 are clamped by overlapping portions of the upper support plates 110 and 210 of the respective sub brackets and the ends of the support girders 300 supported above the upper support plates 110 and 210. Bracket support type down frame placing system characterized in that the clamping and fixing to each other by (400). The method according to claim 1, The bottom continuous pour system of the bracket support type, characterized in that the end portion of the continuous continuous wall side of the support girder 300 is supported by a separate support bracket 16 fixedly installed on the inner surface of the underground continuous wall 1. . In the downward frame placing method for constructing the underground structures such as beams and slabs from the ground floor to the lower ground floor, Constructing a continuous wall for mud walls and constructing a frame pillar in the inner ground; Fixing the stopper means and the support brackets on the outer surface of each pillar and the inner surface of the underground continuous wall after the first ground excavation; Pressing and mounting the movable support bracket, which is movable in a fixed position, on each column according to the height of the beam and the slab and fixedly supporting the stopper means using the stopper means; Horizontally supporting and supporting a length steel support girder between two adjacent pillars in such a manner as to support an end portion over the movable support bracket and the support bracket of the underground continuous wall; Supporting and installing the beam and slab construction structures on the support girders; Drilling and curing concrete for beams and slabs and simultaneously excavating the lower ground and installing the stopper means on the column and the support bracket of the continuous wall at the lower level in the same way; Dismantling the movable support bracket after curing the concrete to a certain level and then descending the support girder to re-install the beam and slab construction structure at a lower level and to cast concrete; And repeating the above steps to construct a structure of the basement layer thereafter. 8. The method according to claim 18, As the movable support bracket, The upper support plate is composed of two sets of sub-brackets that can be separated / combined with each other in the respective pillars, and each sub-bracket supports the end of the support girder upward while the lifting suspension can be fixed. And a pressing plate which is pressed in a state in which the outer surface of the pillar is wrapped while being mutually coupled, and the pressing plate is held downward by the stopper means, and the upper and lower positions thereof are fixed by the stopper means together with the tightening friction force of the pressing plate. Bracket support method for placing down frame, characterized in that to use as possible. The method according to claim 18 or 19, In the step of supporting the support girder, the end of the support girder is supported on each sub-bracket upper support plate of the movable support bracket, and then the overlapping portions of the upper support plate and the end of the support girder are fixed to each other using a clamp. Down frame pouring method of bracket support method. The method according to claim 18 or 19, In the process of lowering the movable support bracket with the support girder after dismantling, separating the two sub-brackets of the movable support bracket from each other and then descending step by step using the respective suspension for each sub-bracket Down skeleton pouring method of the method. The method according to claim 18, In the step of supporting and installing the structure for constructing the beam and slab, Supporting and installing the beam formwork comprising a beam side plate and a bottom plate, formwork support frame as the structure for beam construction on the support girder, and installed by supporting the slab construction structure by the beam formwork, the beam side plate is then poured Bracket-supporting down-frame placing method characterized in that the installation after welding the stud bolt or reinforcing bar protruding on the inner surface so that it can be inserted into the interior of the concrete. The method according to claim 22, Wherein the reinforcing bar using the one made in the 'c' shape, the bracket support type down frame pouring method characterized in that the both ends are fixed by welding to the inner side of the beam side plate. The method according to claim 18 or 23, During disassembly of the movable support bracket, the beam side plate is lowered together with the support girders and reinstalled the beam and slab construction structure at a lower level. The beam side plate is constructed by a stud bolt or reinforcing bar inserted into and fixed into concrete. To be fixed on the side of the, and the support plate and the formwork support frame is moved down the support girders when descending bracket support method, characterized in that to reinstall with a new beam side plate at a lower floor height.