KR100694493B1 - Downward construction method capable of using bracket support type temporary structure as working table - Google Patents

Abstract

The present invention relates to a reverse casting method that can utilize a bracket-supported temporary structure as a workbench, while being able to utilize a temporary structure supported by a bracket as a workbench during construction of each floor, thereby improving safety in terms of safety. Since the deck to be used as a floor structure is included in the temporary structure to reduce the installation cost of the workbench, such as the reverse casting method that can utilize the bracket-supported temporary structure, which is advantageous in terms of utility and economics.

Bracket, Temporary Structure, Reversal Method, Truss Deck, Deep Deck, Plywood Formwork, Support Girder, Reinforcement Beam

Description

Downward construction method capable of using bracket support type temporary structure as working table}

1 is a plan view in which the first embodiment of the bracket support type temporary structure used in the present invention is installed;

2A and 2B are cross-sectional views of a first embodiment of the temporary structure shown in FIG. 1;

3 is a cross-sectional view showing the beam and slab construction system of the first floor and the basement floor in the case of using the first embodiment of the temporary structure shown in FIG.

4 is a cross-sectional view showing the lowest beam and slab construction system in the case of using the first embodiment of the temporary structure shown in FIG.

5a to 5h is a process diagram showing the entire process of construction of the beam and slab reverse construction of the basement floor that can utilize the first embodiment of the temporary structure shown in FIG.

6 is an enlarged cross-sectional view showing a state in which a truss deck is fixed on a support girder and a reinforcement beam in the case of using the first embodiment of the temporary structure shown in FIG.

7 is a plan view in which the second embodiment of the bracket support type temporary structure used in the present invention is installed;

8A and 8B are cross-sectional views of a second embodiment of the temporary structure shown in FIG.

9 is an enlarged cross-sectional view illustrating a state in which a deep deck is fixed on a support girder and a reinforcement beam in the case of using the second embodiment of the temporary structure shown in FIG. 7;

FIG. 10 is a cross-sectional view showing a beam and slab construction system for the first floor and the basement floor when using the second embodiment of the temporary structure shown in FIG. 7; FIG.

FIG. 11 is a cross-sectional view showing the lowest beam and slab construction system in the case of using the second embodiment of the temporary structure shown in FIG. 7; FIG.

12 is a plan view in which the third embodiment of the bracket support type temporary structure used in the present invention is installed;

13A and 13B are cross-sectional views of a third embodiment of the temporary structure shown in FIG. 12;

14 is a cross-sectional view showing a beam and slab construction system of the basement floor in the case of using the third embodiment of the temporary structure shown in FIG.

15A to 15H are overall process diagrams illustrating a process of constructing a beam and slab reverse construction of the basement floor in which a third embodiment of the temporary structure shown in FIG. 12 can be used as a work bench.

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

1: retaining wall 2: H-beam pillar

7: deep deck 110: support bracket

120: support girders rectangular frame 121a, 121b: support girders

130: temporary structure 131: reinforcement support frame

139: truss deck 140: temporary frame

142: lumber 145: deep deck

149: plywood formwork 150: beam formwork

153: Truss Deck

The present invention relates to a reverse casting method that can utilize a bracket-supported temporary structure as a workbench, while being able to utilize a temporary structure supported by a bracket as a workbench during construction of each floor, thereby improving safety in terms of safety. Since the deck to be used as a floor structure is included in the temporary structure to reduce the installation cost of the workbench, such as the reverse casting method which is advantageous in terms of utilization and economics.

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

After constructing the earthquake on the ground where the underground structure is constructed, install the temporary facility to support the earthquake while excavating the ground, take out all the earth and sand, and build the structure from the bottom floor, After the construction of the first-floor structure, using the structure as a retaining member for the earthquake, the reverse casting method is to construct the structure while drilling the ground from the top to the bottom.

In recent years, underground construction has been gradually intensified in order to maximize land use. Especially, when the construction is performed by the net pouring method, it is not only visually unstable as well as the occurrence of cracks due to the risk of earthquake collapse or settlement of surrounding buildings. Due to various problems such as lengthening of the construction period, the reverse casting method has been widely applied in recent years.

In this reverse casting method, after constructing the retaining wall and the frame for the underground frame, the underground structures such as slabs and beams are constructed step by step from the ground floor to the underground floor. It can proceed at the same time, the floor of the ground floor can be utilized as a workshop, there is no need for a separate perforated plate, there is an advantage that the work can be plain.

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 method of placing concrete by suspending formwork on the concrete slab on the upper floor instead of establishing a ridge for supporting the formwork (inverted reversal suspension formwork).

Among them, the method of using copper barley is a method applied to strata with relatively high relative density. After digging the ground, the discarded concrete is placed on the excavated ground, and the discarded concrete is used as the support base. After installing the concrete, the concrete of the beam and slab is poured.

Here, the beam formwork and slab formwork are supported by clubbing on discarded concrete on the excavation ground.

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

In addition, the temporary materials such as formwork, dongbari, etc. should be taken out of the Gulto workshop and moved back to the lower floor after reconstruction, 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.

On the other hand, in order to solve the problem of using the grouping, as a non-supporting formwork system for top down construction that is constructed from the ground floor to the lowest basement when building underground structures, Instead of installing it, an unsupported reversal suspension formwork was proposed to suspend the formwork on the pre-installed upper concrete slab.

This unsupported back-casting formwork is a method of constructing a lower slab by using the formwork with the formwork suspended from the upper slab.

In order to build underground structures of each floor using this method, concrete is laid on the formwork to construct upper slabs, and the formwork used in the construction of the upper slab is lowered by using a hydraulic lift on the upper slab. The lowering slab is constructed by using the lowered formwork for each floor.

This suspension method is more advantageous in securing the workplace and ensuring the safety of the worker because it is installed by hanging the formwork on the upper slab without installing the copper bar at the bottom of the slab formwork and the beam formwork. It is possible to proceed continuously, it is possible to obtain excellent concrete quality by securing a sufficient curing period, and at the same time has the advantage that it is possible to shorten the air and reduce 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 developed by the unsupported method has the following problems.

In the conventional suspension support method, the concrete construction of the lower slab is made while both the hydraulic elevator and the suspension are supported by the upper concrete slab.

In other words, it is a system in which the load of concrete cast into the lower slab is entirely supported by the upper slab through formwork and suspension.

As the load of the lower concrete placed on the formwork acts entirely on the upper slab, the excessive load may be applied to the upper slab. It is possible.

As a result, the problem of air delay inevitably occurs as time is required for the complete curing of the pre-installed slab.

In order to solve this problem, Korean Utility Model Registration No. 372315, filed and registered under the name of "Moving assembly support bracket of reversing system," loads concrete while it is being cast on the formwork and deck plate of the construction layer. Disclosed is a bracket for supporting the load of the beam formwork, the deck plate, the support girders, which is a steel frame beam supporting the formwork, on a frame pillar.

In the reverse casting system using the support bracket, a support bracket is mounted at the height of the corresponding floor of each frame pillar, and a support girder is supported on the support bracket, and the formwork is supported on the support girder, and the deck plate is provided on the formwork. Supported.

In addition, since the support bracket can be easily mounted and dismantled on the column, when the concrete placing work of the beam and the slab is completed for the floor, the support brackets are lowered to the lower level on the column and reinstalled to be used for the same purpose. do.

Thus, the method using the support bracket is a method of supporting the formwork of the beam and the slab by using the support bracket on the frame pillar rather than the method of suspending and supporting the upper slab pre-constructed using the suspension material. In other words, the above mentioned problems of suspension support can be solved.

In addition, the support bracket used in the reverse casting method has been filed with a more improved support bracket with a simpler, lighter weight and lower manufacturing cost. (Korean Patent Application No. 10-2005-0035022 and Korean Utility Sinan Application No. 20-2005-0016621).

However, even if the support bracket is used, there is no particular improvement in the installation of the work platform where the worker climbs up during the construction of the basement floor, and in general, the suspension support method is used to suspend the work platform using the suspension material. It is very vulnerable in safety, such as unstable and rocking, and had disadvantages in terms of cost and usability.

Therefore, the present invention has been invented to solve the above problems, it is possible to utilize the temporary structure that is fixedly supported by the bracket as a workbench during the construction of each floor, there is an effect that is improved in terms of safety, and used as the bottom floor structure The present invention relates to a reverse casting method that can utilize a bracket-supported temporary structure that is advantageous in terms of utility and economics, such as reducing the installation cost of a workbench because the deck is included in the temporary structure.

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

The present invention, in the reverse casting method for reverse construction of the beam and the slab of the basement floor,

(a) constructing an H-beam column in the inner ground after the construction of the retaining wall; (b) after the primary ground pit, the support bracket is fixed to the exposed H-beams and the support girder is installed between the two support brackets of neighboring H-beams and between the support bracket and the wall; (c) supporting and installing a temporary structure on the support girder; (d) installing slab formwork and beam formwork thereon while using the temporary structure as a workbench, and then placing concrete on the first floor floor slab and beam; (e) dismantling and lowering each of the support brackets after the second ground ground excavation and re-installing them according to the installation height of the first basement of the H-beams further exposed; (f) lowering the support girder and the temporary structure with a suspension material and reinstalling the support girder on the support bracket; (g) installing the slab formwork and beam formwork on the workbench while using the temporary structure as a workbench, and then constructing the basement floor slab and beam by placing concrete; (h) repeating the steps (e) to (g) to reverse construction of the bottom slab and beams of the basement 2 and the basement floor below.

In particular, before the installation of the temporary structure of step (c), in step (b), two support girders are installed side by side between two support brackets of adjacent H-beam columns, and two support girders are installed in each line. It is installed horizontally and vertically around the H-beam column, and four support girders arranged in a quadrilateral form from four support brackets are connected to each other by a joining plate between ends, so that four support brackets are used as a unit. Characterized by girder square frame.

In addition, in the step (c), the temporary structure including the truss deck is installed, and the truss deck is used as the slab formwork for the floor construction of each layer, and in the step (h), the lowest layer using the support bracket and the support girder. In construction, the truss deck included in the temporary structure is used as a slab formwork for floor construction.

At this time, as a first preferred embodiment, the process of installing the temporary structure of the step (c),

Stacking and fixing the edge reinforcement beams made of H-shaped steel in two layers on the support girders of the respective square girders installed in the step (b); The longitudinal, transverse and inclined reinforcement beams made of H-shaped steel are additionally installed between the edge reinforcement beams inside the rectangular spaces formed by the edge reinforcement beams. Integrally configuring; And fixing the truss decks by interposing each of the truss decks on the edge reinforcing beams of the respective reinforcing support frames, and fixing the plywood for rehabilitation on the truss decks to complete the temporary structure.

In addition, in step (c), a temporary structure including a deep deck is installed, and a deep deck is used as the slab formwork for floor construction of each layer, but in the step (h), the lowest floor construction using a support bracket and a support girder. At the time, the deep deck included in the temporary structure is characterized in that it is used as slab formwork for floor construction.

At this time, as a second preferred embodiment, the process of installing the temporary structure of the step (c),

In addition, by installing the longitudinal and transverse reinforcement beams made of H-shaped steel in the rectangular space inside each support girder square frame installed in the step (b), the temporary support frame composed of the support girder square frame and the reinforcement beams is integrally formed. Making a step; It is characterized in that the step of fixing the deep decks by interposing the angular material on the reinforcement beams of each temporary supporting frame, and fixing the perforated plywood on the deep deck to complete the temporary structure.

On the other hand, the present invention, in the reverse casting method for reverse construction of the beam and the slab of the basement floor,

(a ') constructing the H-beam column in the inner ground after constructing the wall; (b ') the first step after ground excavation, fixing the support brackets to the exposed H-beams, and installing the support girder between the two support brackets of the neighboring H-beams and between the support brackets and the retaining walls; ; (c ') installing reinforcing beams and supporting beams and joists in order, and then installing slab and plywood formwork for beam construction on the joists, constructing a temporary structure comprising them; (d ') constructing concrete in the plywood formwork to construct the ground floor slab and beams; (e ') after the ground is excavated in a second step, dismantling and lowering each of the supporting brackets and reinstalling them according to the installation height of the first basement of the H-beams further exposed; (f ') lowering the temporary structure including the support girder and the plywood formwork with a suspension material and reinstalling it on the support bracket; (g ') constructing concrete in a plywood formwork of the temporary structure to construct a basement floor slab and beams; (h ') repeating the steps (e') to (g ') by stepping down the bottom slab and beams of the basement 2 and the basement floor below.

In addition, as a third preferred embodiment, the process of installing the temporary structure of the step (c '),

The longitudinal and transverse reinforcement beams of H-shaped steel are additionally installed in the rectangular frame of each support girder installed in the step (b '), and the H-beams are supported on the support girder, longitudinal and transverse reinforcement beams. Stacking the supported support beams in two layers to integrally construct a temporary support frame consisting of the support girder square frame, the reinforcement beams and the support beams; And installing the joists on the temporary support frames in the transverse direction with the support beams, and then fixing the plywood formwork on the joists to complete the construction of the construction of the construction.

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

The present invention relates to a reverse casting method using a support bracket fixedly installed on a column to support a beam and slab formwork to be cast in concrete during the construction of a beam and a slab of a basement layer. The main point is to install the temporary structure to support the mounting bracket.

1 is a plan view in which the first embodiment of the bracket supporting type temporary structure (working table) used in the present invention is installed, and FIGS. 2A and 2B are cross-sectional views of the first embodiment of the temporary structure shown in FIG. Is a cross-sectional view taken in the direction 'AA' of FIG. 1, and FIG. 2B is a cross-sectional view taken in the direction 'BB' of FIG.

FIG. 3 is a cross-sectional view showing a beam and slab construction system of first and basement floors when the first embodiment of the temporary structure shown in FIG. 1 is used, and FIG. 4 is a first embodiment of the temporary structure shown in FIG. In the case of using the example, it is sectional drawing which shows the lowermost beam and slab construction system.

5a to 5h are process diagrams illustrating the entire process of construction of beam and slab reverse construction of the basement floor which can utilize the first embodiment of the temporary structure shown in FIG. 1 as a work bench.

1 to 5h show an example of the reverse casting method for the case of using a truss deck as a slab formwork structure, the first and lower basement construction includes the truss deck used as the lowermost main structure It is characterized by using the truss deck included in the temporary structure as a main structure for slab construction at the time of construction of the lowermost floor.

First, CIP (Cast In-Place Pile) is constructed along the boundary line of the building to be constructed as a barrier wall (1). In this CIP, an H-pile is usually used as a thumb pile, and the vertically constructed H-pile is It acts as a vertical bending member that directly supports the earth pressure and water pressure.

Subsequently, after drilling a hole at a position corresponding to the pillar of the building in the inner ground of the retaining wall (1), the H-beam column (2) is inserted, and the PRD foundation concrete (3) for each H-beam column (2) ) To finish the column construction.

Next, for the construction of the ground floor slab (S1) and the beam (G1), the support bracket 110 is fixed to a predetermined height of each exposed H-beam column (2) after first excavating the ground. Up to now, the construction process using the conventional support bracket is the same.

However, the support girders 121a and 121b for supporting the beam and the slab formwork structure are installed on the support bracket 110, and in particular, in the present invention, a temporary structure to be used as a workbench on the support girders 121a and 121b. After the 130 is additionally installed, since the beam and slab formwork structures 150 and 153 are installed on the temporary structure 130, the height at which the support bracket 110 is installed in each H-beam column 2 is compared with the prior art. The temporary structure 130 is installed as low as the height is installed.

The support bracket may be selected and used in Korea Utility Model Registration No. 372315, Patent Application No. 10-2005-0035022, Utility Model Application No. 20-2005-0016621.

After the support bracket 110 is installed as described above, the support girders 121a and 121b are installed on the support bracket, and on the support girders 121a and 121b, a temporary structure 130 which can be used as a work bench is installed. On the temporary structure 130, formwork structures 150 and 153 for concrete construction of the slab S1 and the beam G1 of the first floor are installed.

Each of the support girders 121a and 121b is installed by supporting both ends of the support brackets 110 on two adjacent pillars 2, and the support girders 121a and 121b support the support brackets 110 and the soil wall on the columns. When installed between (1), the end of the retaining wall side is supported on a separate bracket (4) or supporting means or discarded concrete installed on the H-pile in the retaining wall (see Fig. 5b).

The support girders 121a and 121b may be implemented as H-shaped steels, and as shown in FIG. 1, the support girders 121a and 121b are disposed to be arranged in two rows each around the H-beams 2. do.

That is, two support girders 121a and 121b are installed side by side between two support brackets 110 of the neighboring H-beam pillars 2, and two support girders 121a and 121b are formed by two rows of each H-beam pillar. Since it is installed in the longitudinal, transverse, and all directions about (2), the support girders (121a, 121b) is a lattice arrangement structure connecting the support brackets 110 of the H-beams (2).

Referring to FIG. 1, one end of eight support girders 121a and 121b is supported on one support bracket 110, and four support girders disposed in a quadrangular form on four support brackets 110 ( 121a and 121b are integrated by connecting the ends to the bonding plate 122.

FIG. 1 is a plan view showing the remaining components of the temporary structure 130 excluding the plywood plywood (shown in a circle) 141, and thus, in fact, two layers along the longitudinal direction on each support girder 121a and 121b. Only the reinforcement beams 132 stacked and installed are visible (as seen from above, in reality, only the edge reinforcement beams installed above are visible), and the support girders 121a and 121b are stacked on the edge reinforcement beams 132 stacked thereon. Since it is the same arrangement structure as that, the arrangement structure of the support girders 121a and 121b can be described as above.

The joining plate is indicated by reference numeral 122 in FIG. 2A, in which the joining plate 122 is welded to each end of each of the two supporting girders 121b arranged in the lateral direction, and the joining plate 122 is longitudinally disposed. Ends of the supported girders 121a are fastened by bolts 123, and four support girders 121a and 121b connected between the ends are integrally formed in a rectangular frame shape as a whole.

When the support girders 121a and 121b are lowered for lower construction after the upper layer construction, four support girders 121a and 121b which are connected and fixed between end portions to form a rectangular frame are lowered as one unit.

In Fig. 2a, reference numeral 6 denotes suspensions which are connected to lower the support girders 121a and 121b, the suspensions 6 having lower ends of the jacking points of the support girders 121a and 121b respectively (also shown in Fig. 1). It is used only when the support girder (121a, 121b) and the temporary structure 130 is lowered after dismantling the support bracket (110).

On the other hand, the temporary structure 130 utilized in the workbench according to the present invention, the support girder square frame 120 composed of four support girders (121a, 121b) as described above, each unit is configured for each unit, each Consists of assembling a plurality of reinforcement beams (132, 133, 134, 135), truss deck (139), plywood plywood (141) made of H-shaped steel on the four support girders (121a, 121b) constituting the square frame 120, each support The girder square frame 120 is configured the same.

The configuration of the temporary structure 130 installed on one support girder rectangular frame 120 will be described in detail as follows.

First, the edge reinforcement beams 132 are laminated in two layers on each of the support girders 121a and 121b, and the flanges which are in contact with each other of the support girders 121a and 121b and the edge reinforcement beams 132 thus placed up and down. The portion (flange portion of the H-beam) is fastened with bolts and nuts 124 to fix the rim reinforcement beam 132 on the support girders 121a and 121b.

The edge reinforcing beams 132 are installed in the center one on each support girder (121a, 121b), and a total of three each one in each side thereof.

In addition, since the support girders 121a and 121b are arranged in a quadrangular shape in one support girder square frame 120, the edge reinforcement beams 132 stacked thereon are also arranged in a quadrangular shape as a whole. In the rectangular space formed by the 132, another H-shaped reinforcement beams 133, 134, 135 are properly arranged and fixed.

For example, as shown in Figure 1, in each support girder square frame 120 between the reinforcement beams 132 on the two longitudinal support girders (121a) in both longitudinal directions, the transverse reinforcement beams 133 connected in the transverse direction The longitudinal reinforcement beams 134 connected in the longitudinal direction are installed between the transverse reinforcement beams 133 and the edge reinforcement beams 132 on the two transverse support girders 121b.

In addition, between the two side edge reinforcement beams 132 is installed in the inclined direction reinforcement beams 135 in the inclined direction, all in each direction to install a total of four inclined reinforcement beams 135.

The edge reinforcement beam 132, the transverse reinforcement beam 133, the longitudinal reinforcement beam 134, the inclined reinforcement beam 135 are all used to cut the H-shaped steel to the appropriate size.

Hereinafter, in the present specification, for the sake of clarity, the rectangular frame 120 constituted by the four support girders 121a and 121b is a support girder square frame, and the reinforcement beams 132, 133, 134, and 135 are installed on the support girder square frame 120. Another frame will be referred to as a reinforcement support frame 131.

The reinforcing beams 132, 133, 134, and 135 constituting the reinforcing support frame 131 are connected to each other by using a joining plate similarly to the support girders 121a and 121b, for example, by being laminated on the support girders 121a and 121b and bolted together. The joint plate 137 is welded to the inner side of the edge reinforcement beam 132 so as to protrude laterally, and the bolt and nut (with the end of the inclined reinforcement beam 135 bonded to the side protruding joining plate 137). 138) to be fixed.

FIG. 6 shows the coupling structure between the lateral reinforcement beams 132b disposed at right angles, but similarly, the same is applied between the center edge reinforcement beams 132a, the lateral reinforcement beams 133, and the longitudinal reinforcement beams 134. Secure the connection between the ends using a joining plate in the form.

On the other hand, the truss deck 139 is installed on the reinforcement support frame 131 composed of the reinforcement beams 132, 133, 134, 135 as described above, the plywood 141 for the perforation is laid on the truss deck 139, each end Reinforcement support frame 131, the truss deck 139, the plywood plywood 141 is installed in order on the support girder square frame 120, the overall support frame 131, truss deck (139) for each support girder square frame unit ), The temporary structure 130 is configured to include a plywood 141 for construction, the temporary structure 130 is utilized as a workbench at the time of construction of the floor.

The lateral reinforcement beams 133, the longitudinal reinforcement beams 134 and the inclined reinforcement beams 135 are installed so that the height of the flange upper surface is the same height, and directly supports the truss deck 139 thereon. Let's do it.

However, in the case of the edge reinforcement beam 132, the truss deck 139 is supported through the lumber 142 via the lumber 142 between the truss deck 139.

That is, after inserting the horn 142 in the channel member 143, the horn 142 is fixed with the channel member 143 and the nail 144a, and thus the rim is fixed to the channel member 143 where the horn 142 is fixed. It is fixed by welding to the flange upper surface of the reinforcing beam 132.

After fixing the channel member 143 on the rim reinforcement beam 132 as described above, the truss deck 139 and the lumber 142 are fixed with nails 144b again, through which the truss deck 139 is the lumber 142. It is to be completely fixed to the edge reinforcement beam 132 through the).

After the truss deck 139 is fixed as described above, after covering the plywood for rehabilitation thereon, the plywood 141 and truss deck 139 for rehabilitation are completely fixed using separate fixing means (141a). In the end, the temporary structure 130 composed of the reinforcement support frame 131, the truss deck 139, the plywood plywood 141, etc. is integrally fixed on the support girder square frame 120 to be used as a workbench.

As the truss deck 139 in the temporary structure 130, that is, the workbench, a truss deck used as the present structure is used for the construction of the slab of the lowermost floor. It is used to include, but the construction of the lowest floor is used to construct the slab (S4) by placing and curing concrete directly inside.

After the support brackets 110 are installed on each pillar as described above, the support girder 121a and 121b and the temporary structure 130 are supported using the support brackets 110, and then the beam for the first floor construction is performed. And install the slab formwork (150,153).

1 to 5H illustrate formwork and support systems for building a basement floor structure in the form of a flat slab, in which a cube is placed between each H-beam column and slab, as is known in the flat slab structure. Connections, ie, hexahedral beams, are constructed to protrude downward.

Referring to the process of installing the beam and slab formwork for the first floor construction, install the beam formwork 150 consisting of a drop panel 151 and the formwork 152 on the temporary structure 130 installed as described above, The truss deck 153, which is a slab formwork structure, is supported and installed on the formwork 152.

In addition, the temporary structure between the two neighboring H-beam pillars (2), more specifically between the two beam formwork 150 of the neighboring H-beam pillars (2) to support the truss deck (153) in an intermediate position 130, install the appropriate number of formwork 152 (only one is installed in the illustrated example, the number of installation can be changed appropriately).

After finishing the formwork as described above, after the reinforcement work to install the reinforcing bar to the inside of the beam and slab forming space formed by the beam formwork 150 and the truss deck 153, and placing concrete in the forming space and Curing and concrete construction of the first floor floor beam (G1) and slab (S1).

The formwork 150 at the time of the formwork can be installed in various forms of known formwork, the formwork is not limited to the specific form illustrated in the drawings.

For example, in the case of flat slab construction, beam formwork (using a drop panel, etc.) can be formed on the temporary structure 130 to form beams protruding downward from a hexahedron around each H-beam column 2. In the case of directional beams (2-way wide girder system), a well-known two-way beam formwork is installed, which connects long between two H-beam columns.

After the ground floor construction is completed as described above, the ground is additionally excavated for the construction of the first floor underground, and then each support bracket 110 is divided and dismantled and then lowered to the predetermined first floor installation height. Fixed installation on H-beam column (2).

When the support bracket 110 is lowered, the support girder 121a and 121b are dismantled together with the temporary structure 130 by using the suspension material 6 connected to the jacking points of the support girders 121a and 121b. Of course, it must be supported on the first floor, which was previously constructed.

In this case, the suspension material 6 is connected to the suspension lowering device 5 disposed on the floor of the first floor of which the top is pre-installed to support the support girders 121a and 121b and the temporary structure 130.

The suspension member 6 serves to temporarily support the support girders 121a and 121b and the temporary structure 130 in a state in which the support bracket 110 is divided and dismantled from the column 2. The girder (121a, 121b) and the temporary structure 130 is used to lower the suspension in order to reinstall the lower level.

In this way, after completing the lower installation of each support bracket 110, the support girders (121a, 121b) and the temporary structure 130 is lowered using the suspension (6) and then the corresponding support as in the first floor construction Support on the bracket (110).

The truss deck 153 on the temporary structure 130 during the construction of the first floor is integrated with the slab concrete to form the first floor floor structure, except for the truss deck 153 and the temporary structure 130 and the support. The girders 121a and 121b are suspended together.

At the time of descending, the support girders 121a and 121b and the temporary structure 130 are suspended from each other in an assembled state, and one support girder square frame 120 composed of four support girders 121a and 121b is coupled thereto and The hypothesized structure 130 is descended for each unit sequentially.

Of course, the floor slab (S1), the truss deck 153 of the floor slab (S1), the plywood for plywood so that the suspension material 6 can be connected to the support girders (121a, 121b) located below the floor slab of the first floor. 141 and the truss deck 139 of the temporary structure 130, the through-hole (not shown) through which the suspension material 6 can pass, and connects the suspension material (6) through the through hole Right.

After re-installing the support bracket 110, the support girder square frame 120, and the temporary structure 130 in accordance with the installation height of the first basement level as described above, the construction of the beams G2 and the slab S2 of the first basement level is performed. In order to demolish the formwork 150, such as the drop panel 151 used during the construction of the first floor, reinstalled on the temporary structure 130, and performs the formwork to install the formwork 152 and the truss deck 153. .

After the formwork is finished, the reinforcement work in the beam and slab forming space, and then the concrete is poured into the forming space.

In this way, after the concrete is poured, after the curing of the ground floor on the first basement floor, the ground construction on the first floor is repeated for the second floor.

That is, after the third ground excavation, each support bracket 110 is divided and dismantled and lowered and reinstalled to the basement level 2, and then the support girders 121a and 121b and the temporary structure 130 are lowered by each unit to support the bracket. After supporting on the (110), after the installation of the support girders (121a, 121b) and the temporary structure 130 is all finished, after placing the formwork and reinforcement work to cast concrete in the molding space beams (G3) and slabs of the second basement Construct (S3).

As described above, when the ground construction of the basement 2 floor is completed, the ground is additionally excavated in the fourth way for the ground construction of the basement 3 floor. Lower and reinstall to the third floor installation height.

Subsequently, the support girders 121a and 121b and the temporary structure 130 are also supported on the support bracket 110 by being lowered to the lower floor in the same manner as when installing the basement 2 floors.

5A to 5H illustrate an example of constructing a four-storey basement building, and in the case of constructing a four-storey basement building, the three-basement floor construction is performed by the support bracket 110 and the support girders 121a and 121b. Becomes the last layer (lowest layer).

In this case, the truss deck 139 included in the temporary structure 130 is used as the slab construction form for the floor construction of the basement 3 floors.

That is, in the state in which the support girders 121a and 121b and the temporary structure 130 are supported on the support bracket 110 in accordance with the installation level of the 3rd basement underground, the plywood for rehabilitation of the temporary structure 130 as shown in FIG. 4. After removing 141, the portion corresponding to the rectangular area of the beam is cut off and removed from the truss deck 139 below.

Next, after dismantling and removing the side rim reinforcement beams 132b on the support girders 121a and 121b, a drop panel (a part of the truss deck 139 and the side rim reinforcement beams 132b) is removed. 151) and the beam formwork 150 is installed, and then the reinforcement work for installing the reinforcing bars in the forming space formed by the truss deck (139) and the formwork 150.

As described above, the bottom edge reinforcement beam 132a in the temporary structure 130 supports the truss deck 139 used as the present structure, but the edge reinforcement beams 132b on both sides are loosened bolts and nuts. It is disassembled from the girders 121a and 121b.

When the formwork and reinforcement work is completed as described above, the concrete is poured into the molding space to construct the beams G4 and the slab S4.

When the floor construction of the basement 3 floors is completed as described above, the foundation and the floor are constructed after the final excavation work to form the space of the basement 4 floors, and then the support bracket 110 and the support girder used for the floor construction of the basement 3 floors. 121a, 121b, reinforcing beams 132a, 133, 134, 135, and the formwork 150 are dismantled and taken out outside.

After completing all the construction process of the beam and slab of the basement floor as above, the construction of the vertical materials such as pillars and walls, and the construction of lamps and stairs from the foundation is completed, and the underground construction is completed. The ground floor may be constructed at the same time before.

7 is a plan view in which a second embodiment of a bracket support type temporary structure (working table) used in the present invention is installed, and FIGS. 8A and 8B are cross-sectional views of a second embodiment of the temporary structure shown in FIG. 7 is a cross-sectional view taken in the line 'CC' direction of FIG. 7, and FIG. 8B is a cross-sectional view taken in the line 'DD' direction of FIG. 7.

FIG. 9 is an enlarged cross-sectional view illustrating a state in which a deep deck is fixed on a support girder and a reinforcement beam in the case of using the second embodiment of the temporary structure shown in FIG. 7.

FIG. 10 is a cross-sectional view illustrating a beam and slab construction system for the first floor and the basement floor when the second embodiment of the temporary structure shown in FIG. 7 is used, and FIG. 11 is a second embodiment of the temporary structure shown in FIG. In the case of using the example, it is sectional drawing which shows the lowermost beam and slab construction system.

7 to 11 show an example of a reverse casting method for the case of using a deep deck as a slab formwork, and the deep deck used as the main structure of the lowermost layer when constructing the first and lower basement floors. It is characterized by using a temporary structure including a supporting structure installed on the support bracket and then using the workbench, and when using the deep deck included in the temporary structure as the main structure for the slab construction.

The deep deck is a slab formwork structure widely used for the construction of unidirectional beams and slabs (wide girder system) as well as flat slab construction of the bar as illustrated.

The second embodiment of the temporary structure shown in FIGS. 7 to 11 is modified in consideration of the use of the deep deck, and is slightly different from the temporary structure of the first embodiment shown in FIGS. 1 to 4.

However, compared with the truss deck method, the deep deck method differs only in the temporary structure used in the workbench for beam and slab construction of each floor, and the overall construction process is the same. It will be described with reference to the process diagram of 5a to 5h.

Referring to the construction process, the construction of the wall, H-beam column construction, primary pit, support bracket installation, support girder installation and the like is the same as the case of using the temporary structure of the first embodiment described above.

For example, the support girders (121a, 121b) are installed in two rows on each side of each of the H-shaped steel pillars (2), four support girders arranged in a quadrilateral form on the four support brackets 110 ( 121a and 121b are integrated by connecting the ends to the bonding plate 122.

That is, the joining plates 122 are welded to each of the two end portions of the supporting girders 121b arranged in the transverse direction, and the ends of the supporting girders 121a arranged in the longitudinal joining plates 122 are fastened with bolts. Four support girders 121a and 121b connected between the ends are integrated into a rectangular frame as a whole.

When descending for lower construction after the upper construction, the four support girders (121a, 121b) connected to be fixed between the ends forming a rectangular frame is lowered as a unit.

On the other hand, the temporary structure 130 utilized as a workbench is configured by each unit by using the support girder square frame 120 composed of four support girders 121a and 121b as one unit, the rectangular frame 120 By installing a plurality of reinforcing beams 133, 134, 146 made of H-shaped steel in the four support girders (121a, 121b) constituting the temporary support frame 140 and thus support girders (121a, 121b) and reinforcing beams ( 133, 134, 146, each of the ashes 142 on the temporary support frame 140 composed of a combination of the deep deck 145 and the plywood 141 for the back and then sequentially configured, each support girder square frame 120 is the same Is configured.

The configuration of the temporary structure 130 installed on one support girder rectangular frame 120 will be described in detail as follows.

First, the reinforcement beams 133, 134, and 146 are appropriately disposed and fixed in the rectangular space formed by the support girders 121a and 121b in the rectangular support girder square frame 120.

For example, as shown in Figure 7, in each support girder square frame 120 between the two longitudinal support girders (121a) in both longitudinal directions, the transverse reinforcement beam is connected in the longitudinal direction through a bonding plate (not shown) A longitudinal reinforcement beam 134 which is installed and is connected in the longitudinal direction between the transverse reinforcement beams 133 and the two transverse support girders 121b in the longitudinal direction also through a bonding plate (not shown). Install).

In addition, between the longitudinal reinforcing beams 134 and the two longitudinal support girders 121a, transverse reinforcing beams 146 that are connected in the transverse direction through the bonding plate (not shown) are further installed.

The reinforcing beams 133, 134, 146 are all used to cut the H-shaped steel to the appropriate size.

Hereinafter, in the present specification, for the sake of clarity, the rectangular frame 120 formed by the four support girders 121a and 121b is referred to as a support girder square frame, and the support girder square frame 120 and the reinforcing beams 133, 134, and 146 integrally assembled thereto are provided. They will be referred to as a temporary supporting frame 140 together.

The support girders 121a and 121b and the reinforcing beams 133, 134 and 146 constituting the temporary support frame 140 are coupled to each other by using a joining plate between the ends, the longitudinal support girders 121a and the transverse support girders 121b. The joint plate connecting the ends of the is shown by reference numeral 122 in Figure 9, and similarly because the junction plate between the support girders (121a, 121b) and the reinforcing beams (133, 134, 146) is used, which is not shown in the separate drawing.

On the other hand, the support girders (121a, 121b) and reinforcing beams (133, 134, 146) constituting the temporary support frame 140 are assembled so that the height of the upper surface of the flange all the same height, the support girders (121a, 121b) and reinforcement beams The horns 142 are mounted on the 133, 134, and 146 to support the deep deck 145 on the horns 142.

That is, as shown in FIG. 9, after inserting the horn 142 into the channel member 143, the horn 142 is fixed with the channel member 143 and the nail 144a, and thus the horn 142 is fixed. The channel member 143 is fixed to the upper surface of the flange of the reinforcing beams 133, 134, and 146 by welding.

After fixing the channel member 143 as described above, the deep deck 145 and the lumber 142 are fixed with the nail 144b again, so that the deep deck 145 is temporarily supported by the lumber 142. 140) to be fully secured.

Here, between the support girders (121a, 121b) and the deep deck (145), as described later, when the bottom layer construction must be easily removed, after interposing only the angular member 142 without using a channel member The nail 144b is fixed between the lumber 142 and the deep deck 145 (see FIG. 9).

As described above, in the state where the deep deck 145 is fixed, the plywood 141 for rehabilitation is laid thereon.

Thus, the temporary structure 130 is composed of a support girders (121a, 121b) and reinforcing beams (133, 134, 146) and the temporary support frame 140, which is bracket-supported on the pillar (2), and the temporary support frame 140 above It is configured to include a deep deck 145 is installed, and a multi-hole plywood 141 is installed above the deep deck 145, it is possible to utilize the workbench during the construction of each floor.

The temporary structure 130, that is, the deep deck 145 in the workbench uses a deep deck used as the present formwork when constructing the lowermost slab, which is included in the temporary structure 130 during the construction of the first and lower basement floors. In the case of the lowest floor construction, it is used to construct slabs by placing and curing concrete directly inside.

After supporting the temporary structure 130 by using the support bracket 110 on each pillar 2 as described above, the beam and slab formwork (150, 7) for the first floor installation is installed.

Referring to the process of installing the beam and slab formwork (150, 7) for the construction of the first floor, beam formwork 150 consisting of a drop panel 151 and formwork 152 on the temporary structure 130 installed as described above ) Is installed first, and is installed by supporting the deep deck (7) of the slab formwork structure on the formwork 152.

It is also hypothesized between two neighboring H-beam pillars 2, more specifically between two beam formwork 150 of neighboring H-beam pillars 2, to support the deep deck 7 in an intermediate position. An appropriate number of formwork 152 is installed on the structure 130 (only one is installed in the illustrated example, but the number of installation can be changed as appropriate).

After finishing the formwork as described above, after the reinforcement work to install the reinforcing bar into the inside of the beam and slab forming space formed by the beam formwork 150 and the deep deck (7), and then placing concrete in the forming space and Curing and concrete construction of the first floor floor beam (G1) and slab (S1).

The formwork 150 at the time of the formwork can be installed in various forms of known formwork, the formwork is not limited to the specific form illustrated in the drawings.

For example, in the case of flat slab construction, a beam formwork (using a drop panel, etc.) may be installed on the temporary structure 130 to form beams protruding downward from a hexahedron around each H-beam column 2. In the case of a directional beam construction (1-way wide girder system), a one-way beam formwork of a known type that connects long between two H-beam columns 2 is installed.

After the ground floor construction is completed as described above, the ground is additionally excavated for the construction of the first floor underground, and then each support bracket 110 is divided and dismantled and then lowered to the predetermined first floor installation height. Fixed installation on H-beam column (2).

After completing the lowering installation of each of the support brackets 110, the temporary structure 130 including support girders 121a and 121b, reinforcing beams 133, 134, 146, and deep deck 145, etc., is suspended. After descending using the support on the support bracket 110 in the same manner as the first floor construction.

At the time of use of the suspension material 7, the floor slab S1 and the floor slab S1 can be connected to the support girders 121a and 121b located below the first floor slab S1. In the deep deck 7, the plywood 141 for the hole and the deep deck 145 of the temporary structure 130, the through hole (not shown) through which the suspension material 6 can pass, and the through It is appropriate to connect the suspension (6) through.

After re-installing the support bracket 110 and the temporary structure 130 in accordance with the installation height of the first basement floor as described above, it is used during the construction of the first floor for the construction of the beam G2 and the slab S2 of the basement 2 floor. The formwork 150, such as the drop panel 151, is demolded and reinstalled on the temporary structure 130, and the formwork 152 and the deep deck 7 are installed.

After the formwork is finished, the reinforcement work in the beam and slab forming space, and then the concrete is poured into the forming space.

In this way, after the concrete is poured, after the curing of the ground floor on the first basement floor, the ground construction on the first floor is repeated for the second floor.

Thereafter, the ground is additionally excavated in the fourth order for the floor construction of the third basement, and then divided and dismantled each support bracket 110 in the same way as the construction of the basement of the second floor.

Subsequently, the temporary structure 130 is also supported on the support bracket 110 by lowering to the lower floor as in the case of the floor construction of the basement 2 floor.

For the construction of the basement 3 floors, the deep deck 145 included in the temporary structure 130 is used as a slab construction formwork.

That is, in the state in which the support girders 121a and 121b and the temporary structure 130 are supported on the support bracket 110 according to the installation height of the basement 3 floors, as shown in FIG. 11, the plywood for rehabilitation of the temporary structure 130 is shown. After removing 141, the portion of the lower deck deck 145 corresponding to the rectangular area of the beam is cut off.

When the part of the deep deck 145 is cut and removed as described above, the lumber 142 on the support girders 121a and 121b is also removed, and then a portion of the deep deck 145 is dropped into the space around the H-beam column 2 from which the part of the deep deck 145 is removed. The panel 151, such as the beam formwork 150 is installed, and then the reinforcement work for installing the reinforcing bar, etc. in the forming space formed by the deep deck 145 and the formwork 150.

When the formwork and reinforcement work is completed as described above, the concrete is poured into the molding space to construct the beams G4 and the slab S4.

When the floor construction of the basement 3 floors is completed as described above, the foundation and the floor are constructed after the final excavation work to form the space of the basement 4 floors, and then the support bracket 110 and the support girder used for the floor construction of the basement 3 floors. 121a, 121b, reinforcing beams 133, 134, 146, and the formwork 150 are dismantled and taken out.

After completing all the construction process of the beam and slab of the basement floor as above, the construction of the vertical materials such as pillars and walls, and the construction of lamps and stairs from the foundation is completed, and the underground construction is completed. The ground floor may be constructed at the same time before.

12 is a plan view in which a third embodiment of the bracket supporting type temporary structure (working table) used in the present invention is installed, and FIGS. 13A and 13B are cross-sectional views of a third embodiment of the temporary structure shown in FIG. 12. FIG. 13A is a cross-sectional view taken along the line 'EE' of FIG. 12, and FIG. 13B is a cross-sectional view taken along the line 'FF' of FIG. 12.

14 is a cross-sectional view showing a beam and slab construction system of the basement floor in the case of using the third embodiment of the temporary structure (workbench) shown in Figure 12, Figures 15a to 15h is a view of the temporary structure shown in FIG. It is a whole process chart showing the process of construction of the beam and slab reverse erection of the basement floor can be used as a workbench of the third embodiment.

12 to 15 show an example of the reverse casting method for the case of using a general plywood formwork instead of the deck plate, the support girders (121a, 121b) and reinforcement beams (133, 134, 146), support beams for the construction of each floor 147, the temporary structure 130 composed of plywood formwork 149 and the like is supported by the support bracket 110, and then installed to utilize the workbench.

In the reverse casting method for installing the temporary structure 130 of the third embodiment, the temporary structure 130 is supported by the support bracket 110 fixed on the pillar 2 and installed, and then the construction of the upper beam and the slab is completed. Then, after descending and re-installing the support bracket 110 and the temporary structure 130, the process of completing the construction of the lower beam and the slab is repeatedly carried out while descending to the lower floor to construct the beams and slabs of the entire basement floor. Compared with the examples described, the overall construction process is similar.

However, there is a difference in that the plywood formwork 149 for constructing beams and slabs of each layer is included in the temporary structure 130 and used as a work bench, and the temporary support frame 140 supporting the plywood formwork 149 is used. There is also a slight difference in the configuration.

Hereinafter, the temporary structure of the third embodiment will be described in more detail.

Installation of the support bracket 110 and the support girders 121a and 121b is the same as the above-described examples.

In addition, in each support girder square frame 120 in which four support girders 121a and 121b are coupled in a quadrangular shape, the support girders 121a and 121b are connected between two support girders 121a in both transverse directions through a bonding plate (not shown). The longitudinal reinforcing beams 133 connected in the longitudinal direction, and the longitudinal reinforcing beams 133 and the two longitudinal longitudinal support girders 121b are also extended in the transverse direction via a joining plate (not shown). Install the transverse reinforcing beams 134 connected.

In addition, the longitudinal reinforcement beams 146 are further installed between the transverse reinforcement beams 134 and the two transverse support girders 121a in the longitudinal direction through a bonding plate (not shown).

On each of the support girders 121a and 121b and the longitudinal and transverse reinforcement beams 133, 134 and 146, the support beams 147 are laminated in two layers except for the positions of the beams to be constructed and fixed with bolts and nuts 147a. do.

The reinforcing beams 133, 134, 146 and the support beams 147 are used to cut the H-shaped steel to the appropriate size.

Hereinafter, for the sake of clarity, the support girder square frame 120 and the reinforcing beams 133, 134 and 146 integrally assembled thereto and the support beams 147 will be referred to as a temporary support frame 140.

On the other hand, on the temporary support frame 140, the joists 148 are disposed at equal intervals so as to be arranged laterally with the support beam 147, and the plywood formwork 149 is installed on the joists 148.

In the plywood formwork 149, the slab formwork portion is supported on the support beam 147, and the beam formwork portion is formed to protrude downward to be supported on the support girders 121a and 121b.

As such, after placing the joists 148 on the temporary support frame 140, the plywood formwork 149 is fixed thereon to complete the temporary structure 130.

The temporary structure 130 installed as described above may be used as a workbench during beam and slab construction, and at the same time, the plywood formwork 149 of the temporary structure 130 is also used as formwork for beam and slab construction, and plywood formwork 149 ) After reinforcement work to install reinforcing steel bars inside, concrete and concrete will be placed inside to construct beams and slabs.

When the construction of the upper beams and slabs is completed through the process of placing and curing concrete as described above, the support bracket 110 and the temporary structure 130 are lowered and reinstalled after the reinforcement work and concrete placing work. After completing the construction of the lower beams and slabs, the construction process is carried out in the same way for all basement floors.

When lowering the temporary structure 130 for lower construction after the upper layer construction, as shown in FIG. 15, the temporary structure 130 including the plywood formwork 149 is separated from the constructed upper slab and beam. It is lowered integrally in the assembled state, and in this case, one support girder square frame 120 and the components of the temporary structure 130 coupled thereto are sequentially lowered for each unit.

Of course, the plywood formwork 149 should be separately configured for each unit to be sequentially lowered, the point where the lower end of the suspension material 6 is connected to the suspension lowering of the temporary structure 130 is supported girder 121a, 121b Or a support beam 147.

In FIG. 12, the jacking point indicates a point where the lower end of the suspension is connected.

15A to 15H, the construction of the retaining wall 1 and the H-beam column 2 is the same as that of FIG. 5A, and after the ground excavation, the support bracket 110 and the temporary structure 130 are installed. When the concrete construction of the beam and the slab is completed in the floor, the overall order of lowering and reinstalling the support bracket 110 and the temporary structure 130 after ground excavation is the same as the example of FIGS. 5A to 5H.

However, even in the lowermost floor, the plywood formwork 149 of the temporary structure 130 is used in the same way as in the upper layer for the concrete construction of the beam G4 and the slab S4. The underground construction is completed by constructing vertical materials such as pillars and walls, and lamps and stairs from the foundation.

In this way, the present invention is a reverse casting method for constructing the bracket-supported temporary structure 130 to use it as a workbench, it is possible to utilize the temporary structure 130 is fixed by the bracket 110 as a workbench In addition, it is effective in terms of safety, and includes decks (139,145) to be used as the bottom floor structure in the temporary structure 130 to reduce the installation cost of the workbench when used as a workbench during construction. Is advantageous.

As described above, according to the reverse casting method according to the present invention, the temporary structure that is fixedly supported by the bracket can be utilized as a workbench during the construction of each floor, while improving the safety aspect, deck to be used as the bottom floor structure When used in a temporary structure to reduce the installation cost of the workbench is advantageous in terms of utilization and economics.

Claims (12)

delete In case of reversing the beam and slab of the basement, (a) After constructing the wall, construct the H-beam column in the inside of it, and (b) After the ground excavation, the support bracket is exposed to the exposed H-beam. And installing a support girder between the two support brackets of the adjacent H-beams and between the support bracket and the retaining wall, and (c) supporting and installing the temporary structure on the support girder; d) installing the slab formwork and the beam formwork on the workbench while using the temporary structure as a workbench, and constructing the ground floor slab and the beam by concrete placing; and e) dismantling each of the supporting brackets after the second ground excavation. And lowering and reinstalling according to the height of the first basement installation of the H-beam column further exposed, and (f) lowering the supporting girder and the temporary structure with a suspended material and reinstalling it on the supporting bracket, and (g) Prize After installing the slab formwork and beam formwork on the workbench using the temporary structure as a workbench, constructing the ground floor slabs and beams on the ground floor by placing concrete, and (h) repeating the above steps (e) to (g) In the reverse casting method that can utilize the bracket-supported temporary structure, including the step of backing down the floor slab and beams of the second and lower basement floor, Before installing the temporary structure of step (c), in step (b), two rows of support girders are installed side by side between two support brackets of adjacent H-beam columns, and two rows of support girders are installed in each H- The support girder square frame is installed horizontally and vertically around the column pillars, and the four support girders arranged in a quadrilateral form from four support brackets are connected to each other by means of a joining plate between the ends. Reverse casting method that can utilize the bracket-supported temporary structure, characterized in that the workbench. In case of reversing the beam and slab of the basement, (a) After constructing the wall, construct the H-beam column in the inside of it, and (b) After the ground excavation, the support bracket is exposed to the exposed H-beam. And installing a support girder between the two support brackets of the adjacent H-beams and between the support bracket and the retaining wall, and (c) supporting and installing the temporary structure on the support girder; d) installing the slab formwork and the beam formwork on the workbench while using the temporary structure as a workbench, and constructing the ground floor slab and the beam by concrete placing; and e) dismantling each of the supporting brackets after the second ground excavation. And lowering and reinstalling according to the height of the first basement installation of the H-beam column further exposed, and (f) lowering the supporting girder and the temporary structure with a suspended material and reinstalling it on the supporting bracket, and (g) Prize After installing the slab formwork and beam formwork on the workbench using the temporary structure as a workbench, constructing the ground floor slabs and beams on the ground floor by placing concrete, and (h) repeating the above steps (e) to (g) In the reverse casting method that can utilize the bracket-supported temporary structure, including the step of backing down the floor slab and beams of the second and lower basement floor, In the step (c), a temporary structure including a truss deck is installed, and a truss deck is used as the slab formwork for the floor construction of each layer, and in the step (h) during the lowest floor construction using the support bracket and the support girder Reverse casting method that can utilize the bracket-supported temporary structure, characterized in that using the truss deck included in the temporary structure as a slab formwork for floor construction. The method according to claim 2, The process of installing the temporary structure of step (c), Stacking and fixing the edge reinforcement beams made of H-shaped steel in two layers on the support girders of the respective square girders installed in the step (b); The longitudinal, transverse and inclined reinforcement beams made of H-shaped steel are additionally installed between the edge reinforcement beams inside the rectangular spaces formed by the edge reinforcement beams. Integrally configuring; Fixing the truss decks by interposing a corner member on the rim reinforcement beams of the reinforcing support frames, and fixing the truss decks on the truss decks to complete the temporary structure; Reverse casting method that can be used as a workbench supported temporary bracket structure, characterized in that consisting of. The method according to claim 4, The edge reinforcement beams are fastened by fastening the flange portions of the support girder and the edge reinforcement beams, which are in contact with each other, by bolts and nuts, and the edge reinforcement beams, longitudinal and transverse reinforcement beams, and inclined portions. Directional reinforcing beams are reverse casting method that can utilize the bracket-supported temporary structure as a workbench, characterized in that the interconnection between the ends via a bonding plate. In case of reversing the beam and slab of the basement, (a) After constructing the wall, construct the H-beam column in the inside of it, and (b) After the ground excavation, the support bracket is exposed to the exposed H-beam. And installing a support girder between the two support brackets of the adjacent H-beams and between the support bracket and the retaining wall, and (c) supporting and installing the temporary structure on the support girder; d) installing the slab formwork and the beam formwork on the workbench while using the temporary structure as a workbench, and constructing the ground floor slab and the beam by concrete placing; and e) dismantling each of the supporting brackets after the second ground excavation. And lowering and reinstalling according to the height of the first basement installation of the H-beam column further exposed, and (f) lowering the supporting girder and the temporary structure with a suspended material and reinstalling it on the supporting bracket, and (g) Prize After installing the slab formwork and beam formwork on the workbench using the temporary structure as a workbench, constructing the ground floor slabs and beams on the ground floor by placing concrete, and (h) repeating the above steps (e) to (g) In the reverse casting method that can utilize the bracket-supported temporary structure, including the step of backing down the floor slab and beams of the second and lower basement floor, In the step (c), the temporary structure including the deep deck is installed, and a deep deck is used as the slab formwork for the floor construction of each layer, but the construction of the lowermost layer using the support bracket and the support girder in the step (h) Reverse casting method that can utilize the bracket-supported temporary structure, characterized in that using the deep deck included in the temporary structure as a slab formwork for floor construction. The method according to claim 2, The process of installing the temporary structure of step (c), In addition, by installing the longitudinal and transverse reinforcement beams made of H-shaped steel into the rectangular space inside each support girder square frame installed in the step (b), the temporary support frame composed of the support girder square frame and the reinforcement beams is integrally formed. Steps; A step of fixing the deep decks by interposing a lumber on the reinforcing beams of each temporary supporting frame, and fixing the perforated plywood on the deep deck to complete the temporary structure; Reverse casting method that can be used as a workbench supported temporary bracket structure, characterized in that consisting of. The method according to claim 7, The support girders, longitudinal reinforcement beams and transverse reinforcement beams can be used as a work station to the bracket-supported temporary structure, characterized in that the interconnection between the end via the joint plate. delete When reversing the beams and slabs of the basement, (a ') after constructing the wall, construct the H-beam column in the inner ground, and (b') after the ground excavation, the exposed H-beam column Fixing the support brackets and installing support girders between two support brackets of neighboring H-beam columns and between the support brackets and the retaining walls, and (c ') the reinforcement beams, the support beams and the joists on the support girders. After the installation, the plywood formwork for slab and beam construction is installed on the joists, constructing a temporary structure including them, and (d ') concrete placing in the plywood formwork to construct the first floor slab and beam. Step (e ') after the second soil ground excavation, and dismantling and lowering each of the support brackets and reinstalled according to the installation height of the first basement of the H-beam column further exposed, (f') the support girder and Going to include plywood dies D) lowering the structure with a suspension material and reinstalling it on the support bracket; (g ') constructing concrete in the plywood formwork of the temporary structure to construct a basement floor slab and beam; and (h') the (e ' In the reverse casting method that can utilize the bracket-supported temporary structure, including the step of repeating the bottom slab and beams of the basement 2 and the basement floor by repeating the steps) to (g '), Before installing the temporary structure of the step (c '), in the step (b'), two support girders are installed side by side between two support brackets of adjacent H-beam columns, and two support girders are installed in each line. It is installed horizontally and vertically around the H-beam column, and four support girders arranged in a quadrilateral form from four support brackets are connected to each other by a joining plate between ends, so that four support brackets are used as a unit. A reverse casting method that can utilize a bracket-supported temporary structure, which comprises a girder square frame, as a workbench. The method according to claim 10, The process of installing the temporary structure of step (c '), The longitudinal and transverse reinforcement beams of H-shaped steel are additionally installed in the rectangular frame of each support girder installed in the step (b '), and the H-beams are supported on the support girder, longitudinal and transverse reinforcement beams. Stacking the supported support beams in two layers to integrally construct a temporary support frame consisting of the support girder square frame, the reinforcement beams and the support beams; Installing the joists in the transverse direction with the support beams on each temporary support frame, and then fixing the plywood formwork over the joists to complete the construction of the construction of the construction of the construction; Reverse casting method that can be used as a workbench supported temporary bracket structure, characterized in that consisting of. The method according to claim 11, The support girders, longitudinal reinforcement beams and transverse reinforcement beams are interconnected by means of a joining plate between the ends, and the support beams are bolted to the upper and lower flange portions which are in contact with each other while being stacked on the upper side of the support girders and the reinforcement beams. And the reverse casting method that can utilize the bracket-supported temporary structure, characterized in that by fastening with a nut to the workbench.

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