KR20060112504A - Downward construction system and method for 1-way girder and slab of underground structure - Google Patents

Abstract

A downward frame installation system for constructing a one-way girder and a deck slab of an underground layer and a method of the same are provided to improve the descending work of the girder mold by using the rotary roller device. A downward frame installation method for constructing a one-way girder and a deck slab(BS) of an underground layer for constructing a girder(BG) and a slab is composed of the steps of supporting a girder mold(110) with a post, continually arranging the girder mold in one vertical or horizontal direction, and installing the girder mold in plural rows of the direction after excavating the ground; supporting/installing a mold deck-type deep deck(120) where steel plates are repeatedly bent as a slab mold structure between the lined girder molds; constructing the one-way girder and the deck slab by pouring/hardening the concrete at the girder and slab space formed by the girder mold and the deep deck; suspending/lowering the girder mold with a height corresponding to the lower floor and installing the girder mold and the deep deck at the lower floor with the same method by using the roller device downwardly guiding the lifting apparatus and the wire of the lifting apparatus at the slab hole and after additionally excavating the ground; pouring/hardening the concrete at the girder and the slab space and constructing the one-way girder and the deck slab of the lower floor; and constructing the one-way girder and the deck slab of the lower floor by repeating the upper steps.

Description

Downward construction system and method for 1-way girder and slab of underground structure

1 is a plan view showing the one-way beam and deck slab of the underground structure constructed in accordance with the present invention,

2 is a cross-sectional view taken along the line 'A-A' of FIG. 1,

3 is a cross-sectional view taken along the line 'B-B' of FIG. 1,

Figure 4 is a bottom perspective view showing a deck slab of the underground structure constructed in accordance with the present invention,

5 is a cross-sectional view showing a state in which concrete is poured after installing the formwork and deep deck in the first embodiment of the present invention,

Figure 6 is a perspective view showing a state of the formwork and deep deck installation in the first embodiment of the present invention,

7A to 7E are views illustrating a process of constructing a one-way beam and a deck slab using the first embodiment of the present invention;

8 is a perspective view showing a state in which the formwork is lowered by the suspension lowering device in the first embodiment of the present invention,

9A and 9B are a perspective view and a sectional view of the roller mechanism applied to the first embodiment of the present invention;

FIG. 10 is a plan view showing a state in which a mobile prefabricated support bracket and a support girder are installed in a second embodiment of the present invention;

Figure 11 is a bottom view of the beam formwork and the deep deck is installed on the support girder in the second embodiment of the present invention,

12 is a cross-sectional view showing a state in which the beam and the slab concrete is poured in a state in which each configuration of the second embodiment according to the present invention,

13 is an enlarged cross-sectional view of a main part in FIG. 12;

14A is a perspective view showing a state in which the H-shaped steel support girder is supported in each movable prefabricated support bracket of the second embodiment according to the present invention;

Figure 14b is a perspective view showing an example of coupling between the support girder in each movable prefabricated support bracket of the second embodiment according to the present invention,

15A is a plan view showing an installation state of two support girders side by side in the second embodiment of the present invention;

FIG. 15B is a cross-sectional view taken along the line 'E-E' of FIG. 15A, showing a state in which lateral buckling reinforcement angles are installed between two side-by-side support girders;

15C is a cross-sectional view taken along the line 'F-F' of FIG. 15A and showing a state where the lifting suspension is connected to the support girder,

16A to 16E are views illustrating a process of constructing a one-way beam and a deck slab using the second embodiment of the present invention;

17 is a plan view illustrating a state in which a one-way support bracket and a support girder installed in a pillar in a third embodiment of the present invention are installed;

18A and 18B are cross-sectional views showing a state in which beams and slab concrete are poured in a state in which all the components of the third embodiment according to the present invention are installed;

19A and 19B are enlarged cross-sectional views of main parts of FIGS. 18A and 18B, respectively;

20A and 20B are a plan perspective view and a bottom perspective view showing a state in which a one-way support bracket is installed on an H-beam in a third embodiment of the present invention;

21A and 21B are a plan view and a bottom view showing a state in which a one-way support bracket is installed on an H-beam in a third embodiment of the present invention;

FIG. 22 is a bottom view showing another example in which a stop puller is fixed to an H-beam by clamping in a third embodiment of the present invention; FIG.

FIG. 23 is a cross-sectional view of a one-way support bracket in which two bracket bodies are installed in a weak axis direction with respect to an H-beam;

24A and 24B are a plan view and a bottom view of the unidirectional support bracket in which the two bracket bodies are installed in the weak axis direction with respect to the H-beam in the present invention;

FIG. 25 is a cross-sectional view taken along the line 'J-J' of FIG. 23;

26A and 26B are perspective views illustrating an example in which a support girder is installed on a one-way support bracket in a third embodiment of the present invention;

27A to 27E are views illustrating a process of constructing a one-way beam and a deck slab using the third embodiment of the present invention;

28A and 28B illustrate a method of lowering the bracket body of the one-way support bracket in the process of using the third embodiment of the present invention;

29 is a plan view showing the arrangement of the beam formwork and deck plate during reverse construction of the underground structure.

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

BG: Bo BS: Deck Slab

101: CFT column 102: H-beam column

104: Dongburi 110: Bo die

120: deep deck 136: rotary roller mechanism

138a: insertion part 138b: rotation part

141: bearing 142: support end

150: movable prefabricated support bracket 153: support girder

155: end plate 156: shim plate

180: one-way support bracket 181: bracket body

183: fastening plate 184: bed plate

185: stop puller 186: stop plate

194, 195: reinforced CT-beam

The present invention relates to a downward frame placing system and method for the construction of a one-way beam and deck slab of the basement, and more specifically, to form a one-way beam for the reverse construction of the beam and slab, it is possible to apply the formwork, long span The construction of one-way beam and deck slab is possible by using the support deck for supporting the deck deck deep deck and the support girder arranged in one direction while being fixedly installed on the beam formwork and the frame column. The work can be reduced or deleted, and the downward frame pour system for the construction of one-way beams and deck slabs in the basement floor, which enables the construction of one-way beams and deck slabs to prevent excessive load on the upper slabs pre-installed by using the support bracket. And to a method.

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 the formwork on the concrete slab on the upper floor instead of erecting a group for supporting the formwork (inverted reversal suspension formwork).

The method of using copper barley is a method applied to strata with relatively high relative density. After drilling the ground, the cast concrete is placed on the excavated ground, and the cast concrete is used as the support base for the copper bar, the formwork and the slab formwork. After installing the concrete, the concrete of the beam and slab is poured.

Here, beam formwork and slab formwork are supported by clubs 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.

In order to reduce the use of clubs with these problems, the deck plate (Deck Plate) has recently been developed with the advantages of unsupported construction has been gradually increasing its use, Figure 29 is a formwork and deck plate for reverse construction of underground structures As a plan view showing the arrangement of the, it will be described as follows.

FIG. 29 shows the arrangement of beam formwork 2 and deck plate 3 for the construction of transverse, longitudinal two-way beams and deck slabs.

In the state in which the retaining wall (not shown) and the frame pillar (1) in the inner underground are constructed, the beam formwork (2) is supported by the clubs on the discarded concrete along the beam to be constructed, and installed. Deck plates (3) are supported and installed between the beam formwork, and then concrete is poured on the beam formwork (2) and the deck plate (3) to complete the slab (deck slab) and the beam.

In this case, since the reverse casting method is used, first, the concrete is installed on the beam formwork and the deck plate, and the upper slab and the beam are pre-installed. By pouring, the lower slabs and beams will be constructed.

In this way, the beam formwork and deck plate installation, slab and concrete placement of the slab are repeated in the construction process of each floor, and the underground structure is constructed step by step toward the basement floor.

However, in the case where the beams in the horizontal and vertical directions must be constructed, as shown in FIG. 29, the beam formwork 2 should be installed in a total of 4 directions centering on the frame pillars 1, and also the pillars are supported to support the formwork. Abandoned concrete pours and copper bars should be installed along the formwork spaces in the center of the four directions.

As such, when the discarded concrete is poured along the pillars in four directions of the pillar center, the amount of used concrete is inevitably increased, and as the construction area of the discarded concrete to be discarded increases, the amount of waste generated and throughput increases. .

In particular, since it is very cumbersome to construct the discarded concrete at narrow intervals along the installation space of the formwork (2) around the frame pillar (1), in the actual site when casting the discarded concrete in the entire ground area inside the retaining wall Is most of them.

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 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 underground structures of each floor using this method, concrete is laid on the formwork to construct the upper slab, and the formwork used in the construction of the upper slab is lowered by using a hydraulic lift on the upper slab. The construction of the lower slab using the lowered formwork is repeated 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.

Therefore, the present invention has been invented to solve the above problems, the beam formwork for constructing a one-way beam at the time of reversal construction of the beam and slab, the deep deck of the deck deck that can be applied long span, and the formwork and the beam formwork By using the support bracket for supporting the support girder arranged in one direction while fixedly installed in the frame pillar, the construction of the one-way beam and deck slab is possible, the casting work of the discarded concrete can be reduced or deleted, the support bracket It is an object of the present invention to provide a system and a method for laying down-frames for the construction of one-way beams and deck slabs in a basement layer, which enables construction of one-way beams and deck slabs so as not to apply excessive loads to the upper slabs pre-installed.

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

The present invention is a method for reverse construction of a beam and a slab of the basement layer,

(a) after the ground excavation, the support is installed by supporting the dies in a group, but installed in a row in a plurality of rows as a whole in a continuous arrangement only in one horizontal or vertical direction; (b) supporting and installing a gold deck-type deep deck in which steel sheets are repeatedly bent as a slab formwork between side by side beam formwork; (c) constructing and curing concrete in the beam and slab space formed by the beam formwork and the deep deck to construct the one-way beam and deck slab; (d) After additional ground excavation, the beam formwork is lowered to the corresponding height downstairs by using roller mechanism to guide the lifting device and the lifting device's wires down the slab hole. Doing; (e) constructing and curing concrete in the beam and slab space to construct a one-way beam and deck slab of the lower floor; And (f) repeating steps (d) and (e) to construct one-way beams and deck slabs of the lower layer.

Here, the roller mechanism is a lower insert portion provided with a support end so that the pipe-shaped insertion main body portion inserted into the slab through hole is actually inserted into the slab through hole and is disposed on the outer periphery of the slab upper surface on the outer periphery, and the roller support. The upper part is separated and integrally coupled to the upper portion, characterized in that the rotating structure is used between the insertion portion outer peripheral portion and the rotating portion inner circumference so that the rotating portion can be freely rotated in the insertion portion.

As another embodiment, the present invention, in the method for reverse construction of the beam and the slab of the basement layer,

(a ') installing a support bracket on the exposed framework pillar after ground excavation; (b ') installing two support girders side by side between the pillars in such a manner as to support an end portion on the support bracket, and continuously installing the support girders in a longitudinal or longitudinal direction only; (c ') installing the beam formwork by supporting it on the support girder, and placing the beam form along the support girder so as to be installed in a plurality of rows in one direction as a whole; (d ') supporting and installing a gold deck-type deep deck in which steel sheets are repeatedly bent as a slab formwork between side by side beam formwork; (e ') constructing and curing concrete in the beam and slab space formed by the beam formwork and the deep deck to construct a one-way beam and deck slab; (f ') After additional ground excavation, the support bracket is dismantled and suspended from the column, and then reinstalled at the corresponding height downstairs, and the support girder is suspended with hydraulic lifts and suspension together with the support form, supporting girders and formwork Installing the deep deck at the height of the downstairs in the same manner; (g ') placing and curing concrete in the beam and slab space to construct a one-way beam and deck slab downstairs; And (h ') repeating steps (f') and (g ') to construct the one-way beam and deck slab of the lower layer.

On the other hand, the present invention, in the down-frame skeleton placing system for reverse construction of the basement beam and slab,

A structure for constructing one-way beams and deck slabs,

A one-way support bracket installed at the corresponding height of the floor in each frame pillar; A support girder installed side by side between the pillars in a form in which an end is fixedly supported on the one-way support bracket, the support girder being continuously disposed in a horizontal or vertical one direction only; A support form installed on the support girder, the support form being long along the support girder and installed in a plurality of rows in one direction; It is characterized in that it comprises a; deep deck as the slab formwork structure is made of a steel deck is repeatedly formed bent over the formwork is formed on a side-by-side beam formwork.

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

The present invention relates to a system and a method for laying down frames for the construction of a one-way beam and a deck slab in a basement layer, and to a beam formwork for constructing a one-way beam at the time of reversing the construction of a beam and a slab, and to a long deck, a gold deck type The main focus is on using Deep Deck.

1 is a plan view showing a wide girder and deck slab in one direction of the underground structure constructed in accordance with the present invention, FIG. 2 is a cross-sectional view taken along the line 'A-A' of FIG. 1, FIG. 4 is a cross-sectional view taken along the line 'B-B', and FIG. 4 is a bottom perspective view showing a deck slab of an underground structure constructed according to the present invention.

As shown, the underground structure constructed by the present invention is constructed by using a one-way beam formwork and a deep deck at the time of each floor construction, so that the beam (BG) in one direction rather than the two horizontal and vertical directions as in the prior art and It will include a deck slab (BS).

1 to 4, reference numeral 101 denotes a CFT pillar as a frame pillar.

Hereinafter, a first embodiment of the present invention for constructing the one-way beam BG and the deck slab BS shown in FIGS. 1 to 4 will be described.

FIG. 5 is a cross-sectional view showing a state in which concrete is poured after installing the formwork and the deep deck in the first embodiment of the present invention, which is a cross-sectional view taken at the same position and direction as the line 'C-C' of FIG. Is a perspective view showing the formwork and the deep deck installation in the first embodiment of the present invention.

The first embodiment of the present invention is a structure for building the one-way beam (BG) and deck slab (BS) of each layer, it is installed between the frame pillars 101 for the construction of the beam, horizontal, vertical two directions And not only the horizontally or vertically arranged in a continuous direction in one long and the formwork (110) supported by the clubs 104; It includes a deep deck 120 is installed in the state in which the end is supported on both sides of the formwork 110 side by side for deck slab construction.

Here, the formwork 110 is laminated with square steel pipes 113 and 114 up and down, but crosses the upper and lower square steel pipes longitudinally and horizontally and welds to form the formwork support frame 112, the formwork support frame On both ends of the upper square steel pipe 113 at 112, the side square steel pipes 115 for forming the lower end side part are laterally disposed and welded, and the formwork bottom plate 116 is disposed above the upper square steel pipes 113. It is configured by installing).

In the beam formwork 110, the lower square steel pipe 114 and the formwork lower plate 116 are formed long in one direction, and in general, the beam formwork 110 is disposed long along the longitudinal direction of the beam BG. The lower square steel pipe 114 is supported and installed by the group 104 on the discarded concrete 103.

In addition, the deep deck 120 is a slab formwork structure having a structure that is deeper than the normal deck plate while the steel plate is repeatedly formed bent structure, both ends are square steel pipe 115 of the side of the beam formwork 110 It is mounted on).

In addition, the finish side of the deep deck 120, the end closure 121 is installed and finished, the end closure 121 is a side square steel pipe 115 generated between the ribs of the deep deck 120 during the concrete pouring And the gap between the deep deck 120 to prevent the concrete from leaking down.

The end closer 121 is provided with a gripping portion 122 having a shape corresponding to the curl side shape of the deep deck 120 along an outside thereof, and the deep deck 120 is fixed to the gripping portion 122. In this way, the dip deck 120 and the end closer 121 are coupled to each other.

Meanwhile, a process of constructing a one-way beam and deck slab of an underground structure using the first embodiment of the present invention as described above is as follows.

7A to 7E are views illustrating a process of constructing a one-way beam and a deck slab of an underground structure using the first embodiment of the present invention, and FIG. 8 shows a formwork suspension suspension in the first embodiment of the present invention. 9A and 9B are a perspective view and a sectional view of the roller mechanism applied to the first embodiment of the present invention.

First, vertically construct a framed pillar, for example, a CFT column 101, in the inner ground of the retaining wall (not shown), and first excavate the ground to a predetermined depth for beam and slab construction of the first basement layer. , Along the position of the beam to be constructed on the excavated ground casts concrete 103 (see Fig. 7a).

Subsequently, the cast iron 110 is supported and installed on the copper wheel 104 using the discarded concrete 103 as a support base, and is continuously installed along the design direction of the one-way beam to be constructed.

In other words, the beam formwork 110 is continuously arranged in the horizontal or vertical 1 direction only along the longitudinal direction of the beam (BG) shown in FIG. In the case of row, it is installed in the form of plural rows of formwork arranged in one direction.

Subsequently, the deep deck 120 is installed between the side-by-side side beam formwork 110 in a manner of supporting an end portion of the side square steel pipe (reference numeral 115 of FIG. 5) of the beam formwork 110 (see FIG. 7B). On the copper side of the deep deck 120, an end closure (refer to reference numeral 121 of FIG. 6) is installed and finished as described above.

After the beam formwork 110 and the deep deck 120 is installed as described above, the reinforcing steel reinforcement in the beam and slab space formed by the beam formwork 110 and the deep deck 120 (reference numeral 105 in FIG. 6). ) And then the concrete is poured simultaneously to complete the construction of the beams BG1 and slab BS1 of the first basement layer (see FIG. 7C).

The beams BG1 and slab BS1 of the first underground layer constructed as described above become the shapes shown in FIGS. 1 to 4, that is, the one-way beam and the deck slab.

After the concrete is poured and cured as described above, the ground is excavated secondly for the construction of the beam and the slab of the second underground layer, and then the discarded concrete 103 is poured along the position of the beam to be constructed on the excavated ground. The beam formwork 110 used in the first underground floor is lowered to the corresponding height of the second underground floor using a suspension lowering device and installed in the same manner as in the first underground floor (see FIG. 7D).

That is, the support formwork 110 is installed to support the copper formwork 104 on the base 104 by using the discarded concrete 103 at the corresponding height of the second basement layer, and the formwork 110 in the design direction of the one-way beam to be constructed. ) Installed in a long continuous arrangement.

The lowering device for suspending the formwork 110 is disclosed in Utility Model Registration No. 367259 (registered on 21 January 2001) filed by the present inventor, but may use the disclosed roller mechanism. In the following, it is preferable to use the rotary roller mechanism 136 of FIGS. 9A and 9B modified to be easily rotated in a concrete-constructed slab.

In FIG. 8, reference numeral 131 denotes a lifting device positioned on the pre-constructed upper slab BS or beam BG, and in this lifting device 131, reference numeral 132 denotes a winch that winds and unwinds the main wire 134. ).

Reference numeral 133 denotes a guide roller for guiding the main wire 134.

Looking at the configuration, the main body 137 having an inner space that is inserted into the through hole 106a of the upper layer slab BS, the lower portion of which is pre-constructed, so that the die lowering sub wire 135 passes through the through hole 106a. And a roller 137a rotatably mounted in the inner space above the main body to guide the sub wire 135 vertically downward through the main body internal space.

Here, the main body 137 is formed in a pipe shape is inserted into the through-hole (106a) of the slab (BS) is inserted into the main body portion 138, and a plate-shaped structure having a U-shape as a whole, the rollers on both side walls 137a is rotatably mounted and consists of a roller support 139 integrally coupled to the upper portion of the insertion body 138.

However, the rotary roller mechanism 136 has a lower insertion portion 138a in which the insertion body portion 138 is inserted into the through hole 106a of the actual slab BS, and the roller support portion 139 is on the upper side. Separately composed of the upper rotating part 138b integrally coupled, the bearing 141 between the outer circumference of the insert 138a and the inner circumference of the rotating part 138b so that the rotating part 138b can be freely rotated in the inserting part 138a. ) Is interposed.

In addition, a support end 142 is installed on the outer circumference of the insertion portion 138a of the rotary roller mechanism 136 so as to span the upper surface of the slab BS around the through hole 106a. The support end 142 is to be supported on the slab (BS).

In order to install the roller mechanism 136 so that the sub wire 135 is connected from the upper side of the slab to the lower side of the slab, the formwork structure for forming the slab, that is, the hole at the position of the through hole 106a at the bottom of the deep deck 120 is previously formed. To be processed, the circular pipe is installed in this hole, and then the slab concrete can be installed so that the through hole 106a is formed in the slab by the circular pipe.

In the lowering device 130, as many subwires 135 as necessary may be connected to one main wire 134 wound on the winch 132 of the elevating device 131, and each subwire may be formed. 135 is vertically guided by a roller mechanism 136 inserted into each through hole 106a and fixedly connected to the pipe 117 supporting the formwork 110.

As a result, when the lifting device 131 is driven to release the main wire 134 wound on the winch 132, the sub-die 135 descends by the same amount at the same time, so that the formwork 110 and the pipe 117 are balanced. Can be lowered slowly.

In particular, when the rotary roller mechanism 136 is used in the present invention, the rotary part 138b and the roller support part 139 can be easily rotated, and according to the direction of the sub wire 135, It is possible to easily set the direction, and thus it is possible to lower the wire 135 and the formwork 110 more stably in the correct direction of the roller support 139 is adjusted.

As described above, after each beam formwork 110 is suspended and lowered to the height of the second underground layer, the deep deck 120 is installed in the same manner as in the first underground layer, and then the formwork 110 and the deep deck 120 are installed. After the reinforcing bars are placed inside the beam and slab spaces formed by), concrete is poured at the same time to complete the construction of the beams BG2 and slab BS2 of the second underground layer (see FIG. 7E).

Thereafter, although not shown in the drawings, the above process is repeated to construct the beams and slabs of the third basement layer and the basement layer below, and the beams and slabs of each layer are constructed in steps while descending to the lower floor by the same method.

The beams and slabs of each basement layer constructed in this way become the shapes shown in FIGS. 1 to 4, that is, the one-way beams and the deck slabs.

According to the configuration of the first embodiment of the present invention and the construction method of the underground structure using the same, since the formwork is installed only in one direction rather than in the horizontal and vertical two directions, the discarded concrete also needs to be poured in only one direction. Likewise, it is possible to reduce the amount of discarded concrete, and to reduce the amount of concrete waste, as compared to the case where it is placed in the horizontal, vertical two directions, or the entire ground.

Next, a second embodiment of the present invention for constructing the one-way beam BG and the deck slab BS of the basement layers shown in FIGS. 1 to 4 will be described.

FIG. 10 is a plan view illustrating a state in which a movable prefabricated support bracket and a support girder are installed in a second embodiment of the present invention, and FIG. 11 is a support girder, formwork, and deep deck in a second embodiment of the present invention. Bottom view of the installed state.

FIG. 12 is a cross-sectional view showing a state in which beams and slab concrete are poured in a state where all the components of the second embodiment according to the present invention are installed, and taken in the same position and direction as the line 'D-D' of FIG. 11. to be.

FIG. 13 is an enlarged cross-sectional view of a main part of FIG. 12.

14A is a perspective view showing a state in which the H-shaped steel support girder is supported in each movable prefabricated support bracket of the second embodiment according to the present invention, and FIG. 14B is a respective movable prefabricated support bracket of the second embodiment according to the present invention. Is a perspective view showing an example of coupling between the support girders.

As shown, the second embodiment of the present invention is a structure for constructing a one-way beam (BG) and a deck slab (BS) of each floor, and installed at the corresponding height of the corresponding floor of each frame pillar (101) Moving prefabricated support brackets 150; The support girder 153 which is installed long between the frame pillars 101 in the form that the end is fixedly supported on the movable prefabricated support bracket 150, and is continuously disposed only in one direction rather than horizontal and vertical two directions. ; A beam formwork 110 which is supported by the support girder 153 and installed along the support girder 153 for a long time; It includes a deep deck (120) which is installed in a state in which the end is supported on both sides of the side of the formwork (110).

Here, the mobile assembly support bracket 150 is disclosed in Utility Model Registration No. 372315 (registered Dec. 29, 2004) filed by the present inventor.

According to the disclosure, the movable prefabricated support bracket 150 is configured to support the support girder 153 from below, and in particular, a joining (or divided) surface corresponding to each of the lifting suspensions 174 fixed and facing each other. It consists of a pair of sub-frames 151 which are joined or divided along this.

The movable prefabricated support bracket when the pair of ring panels 152 positioned at the upper and lower portions of the center at the same time when the two sub-frames 151 are assembled to each other simultaneously compress the circumferential surfaces of the frame pillars 101. 150 is to be fixed at a predetermined position of the frame pillar (101).

The movable prefabricated support bracket 150 is able to withstand the load transmitted through the support girder 153 during concrete construction of the beam and slab in a state of being fixedly supported on the frame pillars 101, in particular the beam and After the concrete construction of the slab can be easily dismantled, when the construction of the upper floor is completed, it can be moved to the lower floor by using a hydraulic elevator and suspension material, and also can be easily reinstalled after moving the lower floor.

In addition, as disclosed, angular and circular support brackets are shown as mobile prefabricated support brackets 150, and bracket structures that can be used for H-beam columns as well as CFT columns are also shown.

The support girder 153 may be made of H-beam as a steel beam for supporting the beam formwork 110, and both ends are supported on the movable prefabricated support bracket 150 of the two frame pillars 101, The support girder 153 and the bracket 150 are coupled to each other by installing a clamp 154 that tightens the lower flange of the end of the support girder and the upper flange of the subframe 151 of the movable prefabricated support bracket 150. do.

The two support girders 153 arranged in a row in a straight line may be supported in a state separated from each other in each of the movable prefabricated support brackets 150, or preferably may be integrally coupled and supported. When the support girders 153 are integrally coupled to each other between the ends as shown in Fig. 14B, the amount of deflection in each support girder can be reduced, and thus structurally more advantageous.

Referring to FIG. 14B, in order to engage the front and rear support girders 153 successively arranged, the end plates 155 are welded and installed at the ends of the support girders 153, and the end plates 155 of the two support girders 153. A plurality of shim plates 156 are disposed between the gaps.

In this state, the bolts 157a are inserted through the end plates 155 and the shim plate 156, and nuts (not shown) are fastened on the opposite sides so that both end plates 155 are attached to the bolts 157a and To be joined together by a nut.

Figure 15a is a plan view showing the installation state of two support girders side by side in the second embodiment of the present invention, Figure 15b is a cross-sectional view taken along the line 'E-E' in Fig. 15a the lateral buckling reinforcement angle between the two support girders in parallel FIG. 15C is a cross-sectional view taken along the line 'F-F' of FIG. 15A and shows a state in which the lifting suspension is connected to the support girder.

As shown in the figure, between two movable prefabricated support brackets 150, two support girders 153 are arranged in parallel, and the inner side of the support girders 153 facing each other at a position approximately in the middle of the support girders 153. The first gusset plate 158 is installed on the welding, and between the first gusset plate 158 of the two support girders 153, the two transverse buckling reinforcement angles 159 are intersected with each other in the form of 'X' to be connected and installed do.

In addition, the support girder 153 is a hydraulic lift (not shown) on the upper slab pre-constructed for lower construction after the concrete construction of the beam and the slab similar to the movable prefabricated support bracket 150 and a suspension material connected thereto ( 172) is moved to the lower floor to be reinstalled in the same way, as shown in 15a, a jacking point (reference numeral 163 position) to which the lower end of the suspension is connected is set on both left and right sides of the drawing.

A jacking point is set at two left and right positions of the same distance from the longitudinal center of the support girder 153 so that the two supporting girders 153 can be stably lowered. The second gusset plate 161 is welded inside the two support girders 153 in the position, and the H-shaped steel 162 is connected between the second gusset plate 161 of the two support girders 153.

In addition, a connecting bracket 163 is installed on the upper flange upper surface of the H-shaped steel 162, and a lower end of the suspension 172 is pin-coupled to the connecting bracket 163 so that the suspension 172 is H-shaped steel. The structure 162 is connected to the two support girders 153 simultaneously.

In the present invention, the concrete load of the layer under construction is to support the mobile prefabricated support bracket 150 and the frame pillars 101 through the formwork 110 and the support girder 153 is finally received, the suspension ( 172 is not used to support the concrete load is used for the simple lifting of the mobile prefabricated support bracket 150 and the support girder 153 by connecting to the hydraulic elevator after construction.

On the other hand, in the configuration of the second embodiment of the present invention, the beam formwork 110 is fixed on the support girder 153 supported on the movable prefabricated support bracket 150 as shown in FIG.

In the beam formwork 110, the lower square steel pipe 114 and the formwork lower plate 116 are formed long in one direction to follow the longitudinal direction of the support girder 153, the overall formwork 110 is a beam length direction It is supported and installed by the support girder 153 through the lower square steel pipe 114 in a state arranged along the length.

An angle bracket is fixed by bolting or welding so that the lower square steel pipe 114 and the upper flange of the support girder 153 of the beam formwork 110 can be completely fixed on the support girder 153. (Not shown).

The deep deck 120 has a shape or a structure, and both ends of which are mounted on the side square steel pipe 115 of the formwork 110, and an end closure 121 is installed and finished on the copper side. And the like are the same as in the first embodiment, and detailed description thereof will be omitted herein.

Meanwhile, a process of constructing a one-way beam and deck slab of an underground structure using the second embodiment of the present invention as described above is as follows.

16A to 16E are views illustrating a process of constructing a one-way beam and a deck slab of an underground structure using the second embodiment of the present invention.

First, after constructing vertically framed pillars, for example, CFT pillars 101, in the inner basement of the retaining wall (not shown), the ground is excavated by a predetermined depth for the construction of beams and slabs in the first basement layer. The upper part of the CFT column 101 is exposed (see FIG. 16A).

Subsequently, in each exposed CFT column 101, a mobile prefab support bracket 150 is installed at a corresponding height of the first basement layer, and the support girders are supported by supporting the ends of two neighboring mobile prefab support brackets 150. 153) is installed between the pillars.

At this time, the support girders 153 are installed long along the design direction of the one-way beam, and the support girders 153 are continuously arranged in a straight line only in one direction, not horizontally or vertically, and between the support brackets 150. Support two side by side.

The support girder 153 is fixed by fastening with a clamp (reference numeral 154 in FIGS. 14A and 14B) while being supported by the support bracket 150.

Subsequently, the beam formwork 110 is fixedly installed on the support girder 153, and the beam formwork 110 is also installed to be installed along the longitudinal direction of the support girder 153 in a one-way beam design direction.

In other words, the support girder 153 and the beam formwork 110 are continuously arranged only in the horizontal or vertical 1 direction along the beam BG longitudinal direction shown in FIG. When the 110 to a single row as a whole is installed in a plurality of rows of formwork structure arranged in one direction.

Subsequently, the deep deck 120 is installed between the two side beam dies 110 side by side in a manner of supporting an end portion of the side square steel pipe of the beam formwork 110 (see FIG. 16B), and on the side of the deep deck 120 End closure is installed and finished as described above.

After the beam formwork 110 and the deep deck 120 is installed as described above, the reinforcing bar is reinforced inside the beam and slab space formed by the formwork 110 and the deep deck 120, and then poured concrete simultaneously To complete the construction of the beams BG1 and slab BS1 of the first underground layer (see FIG. 16C).

The beams BG1 and slab BS1 of the first underground layer constructed in this way become the shapes shown in FIGS. 1 to 4, that is, one-way beams and deck slabs.

After the concrete is poured and cured as described above, after excavating the ground secondly for the construction of the beam and slab of the second basement layer, the movable prefabricated support bracket 150, the support girder 153, and the formwork 110 are first It is dismantled and lowered in the basement to be reinstalled equally at the corresponding height of the second basement (see FIG. 16D).

When descending, the suspension brackets 172 and 174 connected to the support bracket 150 and the support girder 153 and the hydraulic elevator 173 for lowering the suspension are supported, and the support girder 153 is supported by the suspension 172. In the fixed state, the support bracket 150 is first divided and dismantled and then lowered, and the support bracket 150 is reinstalled at the height of the second basement layer, and then the support girder 153 is lowered together with the formwork 110.

For such a lowering operation, each of the suspension materials 172 and 174 connected to the support bracket 150 and the support girder 153 must pass through the beam BG1 of the first underground layer, which is constructed in concrete at each position. The beam (BG1) must be provided with a through hole (not shown) through which the suspension material can pass during the concrete construction.

The construction of the through-hole can be used the same method as the construction of the through-hole to allow the suspension material to pass in the conventional non-reversing formwork method, or to form a hole in the bottom plate 116 of the formwork 110 at the suspension position After the circular pipe is installed in this hole and slab concrete construction, through holes can be formed in the beam BG1 by the circular pipe.

When the mobile assembly support bracket 150 is divided and dismantled as disclosed in Utility Model Registration No. 372315, one of the two divided parts may be preferentially lowered, and then divided by one part and then lowered. Reassemble at basement level.

When the support girder 153 descends, two side by side can be lowered together with the formwork 110.

The support girders 153 are sequentially lowered by one unit by using the support girders 153 and the beam formwork 110 between the pillars 101, or the support girders 153 continuously arranged in a straight line in one direction. If all are coupled between the ends as shown in Figure 14b, these support girders 153 can be simultaneously lowered together with the formwork 110.

After the support bracket 150, the support girder 153, and the beam formwork 110 are all installed at the height of the second underground layer, the deep deck 120 is installed in the same manner as in the first underground layer, followed by the formwork. After reinforcing bars are reinforced in the beam and slab spaces formed by the 110 and the deep deck 120, the concrete is poured at the same time to complete the construction of the beam BG2 and the slab BS2 of the second underground layer (FIG. 16E). Reference).

Thereafter, although not shown in the drawings, the above process is repeated to construct the beams and slabs of the third basement layer and the basement layer below, and the beams and slabs of each layer are constructed in steps while descending to the lower floor by the same method.

The beams and slabs of each basement layer constructed in this way are the shapes shown in FIGS. 1 to 4, that is, the one-way beam BG and the deck slab BS.

According to the configuration of the second embodiment of the present invention and the construction method of the underground structure using the same, not only does not need to use the copper bar which caused various problems, but also the concrete waste does not occur due to the non-installation of discarded concrete, The concrete slab is distributed evenly to the column through the supporting bracket, so that the upper slab does not apply excessive load to the pre-installed upper slab, and the upper slab only supports the loads of the formwork, the supporting girder and the supporting bracket when the suspension descends. After curing to some extent, it is possible to construct the lower floor and shorten the air.

Hereinafter, a third embodiment of the present invention for constructing the one-way beam BG and the deck slab BS of the basement layer will be described.

FIG. 17 is a plan view illustrating a state in which a one-way support bracket and a support girder are pillar-supported in a third embodiment of the present invention, and FIGS. 18A and 18B are all installed in the third embodiment according to the present invention. Fig. 19 is a cross-sectional view showing a state in which beams and slab concrete are poured, and Figs. 19A and 19B are enlarged cross-sectional views of main parts of Figs. 18A and 18B, respectively.

Here, FIG. 18A is a cross-sectional view taken at the same position and direction as the line 'H-H' of FIG. 17, and FIG. 18B is a cross-sectional view taken at the same position and direction as the line 'I-I' of FIG. 17.

As shown, the third embodiment of the present invention is a structure for constructing a one-way beam (BG) and a deck slab (BS) of each layer, installed at the corresponding height of the corresponding floor of each frame pillar (102) A one-way support bracket 180; The support girder 153 is installed in a long way between the frame pillars 102 in the form that the end is fixedly supported on the one-way support bracket 180, and installed in only one direction rather than horizontal, vertical two directions and ; A support formwork 110 which is supported by the support girder 153 and is installed to be long along the support girder 153; It includes a deep deck (120) which is installed in a state in which the end is supported on both sides of the side of the formwork (110).

In the third embodiment of the present invention, a new support bracket (hereinafter referred to as a one-way support bracket) that can support the ends of the support girders 153 continuously arranged in one direction instead of two in the horizontal and vertical directions is used. The one-way support bracket 180 is configured to be used when the H-beam pillar 102 is constructed as a frame pillar.

In the case of the one-way support bracket 180, it is manufactured to be used only in the support girders that are continuously arranged in one direction, and the configuration and structure are much simpler than the mobile assembly support bracket described above, and the number of parts and the production cost are reduced. It has several obvious advantages.

The configuration of the one-way support bracket will be described in detail with reference to FIGS. 19A and 19B and the following drawings.

20A and 20B are a plan perspective view and a bottom perspective view showing a state in which a one-way support bracket is installed on an H-beam column in a third embodiment of the present invention, and FIGS. 21A and 21B are views of a third embodiment of the present invention. Top and bottom views showing a one-way support bracket mounted on an H-beam.

First, the one-way support bracket 180 includes two bracket bodies 181 of a predetermined length made of H-shaped steel horizontally symmetrically installed horizontally around a vertically constructed H-shaped steel pillar 102 and each bracket body. And bracket fixing means for fixing 181 to the predetermined height of the H-beam pillar 102.

In the illustrated example, two bracket bodies 181 on both sides are installed in the axial direction with respect to the H-beam pillar 102, and the two bracket bodies 181 are the pillars 120 around the H-beam pillar 102. They are bilaterally installed on both left and right flanges of the flange to form a linear arrangement structure as a whole, and the reinforcing plate 182 is welded to the inside of the flange of each bracket body 181.

The bracket fixing means is horizontally welded to both flange surfaces of the H-beam pillar 102 and fastened in a state of being joined to the upper flange upper surface of each bracket body 181, thereby providing each bracket body 181. Two fastening plates 183 for fixing the to the H-beam pillars 102; Two bed plates 184 fastened in a state joined to the lower surface of the lower flange of each bracket body 181; A pair of stop pullers 185 assembled to squeeze the H-beam pillars 102 on both sides and supporting the two bracket bodies 181 while supporting the two bed plates 184 in the assembled position. )Wow; And two stop plates 186 welded to both flange faces of the H-beam pillar 102 to support the respective stop pullers 185 from below.

Here, the two fastening plates 183 are fastened to the flange of the H-beam pillar 102 by a bolt 187a and a nut 187b, and the two bed plates 184 are elongated in the left and right directions in the slot holes 184a. And the nut 188b is coupled to the bolt 188a after the bolt 188a is fitted into the fastening hole of the slot hole 184a and the lower flange of the bracket main body 181. ) And the bracket body 181 is fastened.

In addition, the pair of stop pullers 185 are joined to the flange face of the H-beam column 102 and tightened bolts 189a inserted through both ends and nuts 189b coupled to the bolt ends on opposite sides. It is installed to compress the flange surface of the H-shaped steel column 102 by the tightening force of), and is fixed in position in such a compressed state to support the upper bed plate 184.

Here, the bed plate 184 is welded to the upper end of the same stop puller 185, respectively, the bed plate 184 and the stop puller 185 is used integrally.

Reference numeral 191 is a loosening bolt, unlike the fastening bolts 189a at both ends, these polyimbolts 191 are to be pushed to the flange surface of the H-beam column 102 when the ends are turned in the tightening direction, The stop puller 185 is used to allow easy separation from the H-beam pillar 102.

Preferably, the one-way support bracket 180 is installed, in particular, the upper and lower portions of the H-beam pillars 102 to which the upper and lower flanges of the bracket body 181 are joined to the pillars 102. Reinforcement plate 109 is installed.

Each reinforcement plate 109 is fixed by welding between the flanges of the H-beam pillars 102.

In addition, the shim plate 192 is fitted to fill the gap existing between the lower flange end of the bracket body 181 and the flange surface of the H-beam pillar 102, the shim plate 192 is a bracket body ( Force transfer between 181 and the H-beam column 102.

FIG. 22 is a bottom view showing another example in which a stop puller is fixed to an H-beam by clamping in a third embodiment of the present invention, each stop puller 185 instead of tightening with a tightening bolt and a nut. May be fixed directly to the flange of the H-beam pillar 102 with a clamp 193.

On the other hand, Figure 23 is a cross-sectional view showing an example of the one-way support bracket in which the two bracket body on both sides in the weak axis direction with respect to the H-beam in the present invention, compared with Figure 19a.

24A and 24B are a plan view and a bottom view of the one-way support bracket in which the two bracket bodies on both sides are installed in the weak axis direction with respect to the H-beam in the present invention, and FIG. 25 is a line 'J-J' of FIG. A cross section taken along.

In the illustrated one-way support bracket 180, the H-beam pillar 102 is vertically installed with 90 ° rotation compared with the above-described example, or the direction of the H-beam pillar 102 is the same. It can be used when the construction direction of one beam (or support girder) is 90 ° compared with the above-described example, the configuration is the same as the above-described example.

That is, the one-way support bracket 180 also has two bracket bodies 181 of a predetermined length made of H-shaped steel horizontally symmetrically installed horizontally with respect to the vertically constructed H-shaped steel column 102, and each bracket Two fastening plates 183, two bed plates 184, a pair of bracket fixing means for fixing the main body 181 to a predetermined height of the H-beam pillar 102, the bracket fixing means having the same configuration It consists of a stop puller 185, two stop plates 186.

However, in this one-way support bracket 180, when the H-beam pillars 102 are constructed in the same direction, the two bracket bodies 181 are installed in a 90 ° direction compared to the above-described example, wherein each bracket In order to install the main body 181, two pairs of reinforced CT-beams (194, 195) cut in half along the length of the H-beams inside the H-beam column 102 where the one-way support bracket 180 is fixed are additionally added. Is installed.

That is, each pair of reinforcement CT-beams 194, 195 is placed vertically in the empty space on both sides of the H-beam column 102, so that the flanges of each pair of reinforcement CT-beams 194, 195 and the H-beam column 102 Both sides of the flange are installed to form a four-sided closed cross-sectional structure.

At this time, the reinforcement CT-beams 194 and 195, which are installed in pairs as described above, are respectively installed at the portions where the upper and lower flanges of the bracket body 181 are joined, so that a total of two pairs of the reinforcement CT-beams 194 and 195 are upward and downward. Install the same.

In this state, two stop plates 186 are welded to both ends of the flange of the H-shaped steel column 102 as shown in FIG. 23 in the direction in which the bracket body 181 is installed. 186 supports the stop puller 185 integrally with the bed plate 184 and engages the H-beam pillar 102.

The stop puller 185 and the bed plate 184 are assembled in the state of being joined to the flange surface of the lower reinforcement CT-beam 195, and a pair of stop pullers 185 are inserted through both ends of the fastening bolt ( 189a) and by the tightening force of the nut 189b or by the clamping force of the clamp 193 which tightens together with the flange of the H-beam column 102 (see FIG. 22), the plan of the lower reinforced CT-beam 194. It is installed to compress the ground, and its position is fixed in this compressed state.

Then, the height of each bracket plate 183 is adjusted so that the bracket body 181 can be installed between the bed plate 184 and the example in the direction of the axis described above (fastening plate is installed on the flange of the H-beam column) Similarly, welding is installed horizontally on the flange face of the upper two reinforced CT-beams 194.

Then, after installing the bracket body 181 between each bed plate 184 and the fastening plate 183, the upper flange and fastening plate 183 of each bracket body 181 and the lower portion of each bracket body 181 The flange and the bed plate 184 are fastened to each other with bolts 187a and 188a and nuts 187b and 188b.

A shim plate 196 is fitted between the lower flange end of the bracket body 181 and the flange face of the reinforced CT-beam 194 to fill the gap.

On the other hand, the support girders 153 are respectively installed in parallel between the two adjacent one-way support bracket 180 is fixed to the H-beam pillar 102, each support girder 153 is supported in one direction The bracket body 181 is installed in a long 90 ° direction with the bracket main body 181 while the end is supported on each bracket body 181 of the bracket 180.

26A and 26B are perspective views illustrating an example in which the support girder is installed on the one-way support bracket in the third embodiment of the present invention, and the two support girders 153 continuously arranged on a straight line in one direction on each bracket body 181. Are supported together.

In addition, the role, structure and installation method of the support girder 153 are the same as in the second embodiment.

For example, as in the second embodiment, two support girders 153 arranged in series can be fixed to the upper flange of the bracket body 181 by simply using the clamp 154 in the state where the ends are not connected to each other. (FIG. 26A).

In addition, preferably, each support girder 153 is fixed to the bracket body 181 by a clamp 154, and as shown in Figure 26b to install the end plate 155 by welding to the end of each support girder 153, After the plurality of shim plates 156 are interposed between the end plates 155 of both support girders 153, the two ends of the support girders 153 are fastened to each other by bolts 157a and nuts 157b. To be combined.

In addition, since the lateral buckling reinforcement angle installation, suspension structure connection structure and the lowering method is also the same as the second embodiment, description thereof will be omitted.

In addition, in the third embodiment of the present invention, the configuration of the beam formwork 110 is the same as that of the second embodiment, and the support girders 153 supported by the one-way support bracket 180 as shown in FIGS. 19A and 19B. The beam formwork 110 is fixed above, and the beam formwork 110 is installed only in one direction along the support girder 153.

Deep deck 120 also has a shape or structure, both ends are mounted on the square steel pipe 115 of the side of the formwork 110, the end closure 121 is installed and finished on the side of the finish Both the first embodiment and the second embodiment are the same, and the description thereof is described in the first embodiment and will be omitted here.

Meanwhile, a process of constructing a one-way beam and deck slab of an underground structure using the third embodiment of the present invention as described above is as follows.

27A to 27E are views illustrating a process of constructing a one-way beam and a deck slab of an underground structure using a third embodiment of the present invention, and FIGS. 28A and 28B are views using a third embodiment of the present invention. 2 is a view showing a method of lowering the bracket body of the one-way support bracket.

First, after the vertical construction of the H-beam pillars 102 in the inner ground of the retaining wall (not shown), and excavating the ground to a predetermined depth primarily for the construction of beams and slabs of the first basement layer (H-beam pillar ( Top portion of 102 is exposed (see FIG. 27A).

Subsequently, in each exposed H-beam column 102, a one-way support bracket 180 is installed at a corresponding height of the first basement layer, and an end is supported by two neighboring one-way support brackets 180. Install the support girder 153 between the columns.

At this time, the support girders 153 are installed long along the design direction of the one-way beam, and the support girders 153 are continuously arranged in a straight line only in one direction, not horizontally or vertically, and between the support brackets 180. Support two side by side.

The support girder 153 is fixed by fastening with the clamp 154 while being supported by the support bracket 180.

Subsequently, the beam formwork 110 is fixedly installed on the support girder 153, and the beam formwork 110 is also installed to be installed along the longitudinal direction of the support girder 153 in a one-way beam design direction.

In other words, the support girder 153 and the beam formwork 110 are continuously arranged in the horizontal or vertical 1 direction only along the longitudinal direction of the beam BG shown in FIG. When the beam formwork 110 to a single row as a whole is installed in a plurality of rows of formwork structure arranged in one direction.

Subsequently, the deep deck 120 is installed between the two side beam dies 110 side by side in a manner of supporting an end portion of the side square steel pipe of the beam formwork 110 (see FIG. 27B), and on the side of the deep deck 120 End closure is installed and finished as described above.

After the beam formwork 110 and the deep deck 120 is installed as described above, the reinforcing bar is reinforced inside the beam and slab space formed by the formwork 110 and the deep deck 120, and then poured concrete simultaneously To complete the construction of the beams BG1 and slab BS1 of the first basement layer (see FIG. 27C).

The beams BG1 and slab BS1 of the first underground layer constructed in this way become the shapes shown in FIGS. 1 to 4, that is, one-way beams and deck slabs.

After the concrete is poured and cured as described above, after excavating the ground secondly for the construction of the beam and the slab of the second basement layer, the one-way support bracket 180, the support girder 153, and the formwork 110 are first It is dismantled and lowered in the basement to be reinstalled equally at the corresponding height of the second basement (see FIG. 27D).

At the time of descending, the support girder 153 is supported by a suspension material and then fixed in a state where the one-way support bracket 180 is first dismantled and then lowered by using the chain 201 and the chain block 200 for lowering the chain, and supporting in one direction. After the bracket 180 is reinstalled at the height of the second basement layer, the support girder 153 is lowered together with the beam formwork 110 by using a hydraulic elevator for lowering the suspension and the suspension.

The one-way support bracket 180 can lower any one of the two bracket main bodies 181 preferentially, lowering it by one part, and then reassemble it at the height of the second underground layer.

When reassembling the one-way support bracket 180, the stop plate 186, the stop puller 185, the bed plate 184, the fastening plate 183, the bracket body 181, and the shim plate may be assembled in this order. .

When the support girder 153 descends, the two side by side down with the beam formwork 110, and after the support girder 153 is fixed by fastening with a clamp 154 on the support bracket 180.

The support girders 153 are sequentially lowered by one unit using the support girders 153 and the beam formwork 110 between the pillars 102, or the support girders 153 continuously arranged in a straight line in one direction are provided. If all are coupled between the ends, all of these support girders 153 can be simultaneously lowered together with the formwork 110.

28A and 28B illustrate a method of lowering the bracket body 181 after disassembling the one-way support bracket 180. The connecting ring 182a is connected to the reinforcing plate 182 installed in each bracket body 181. It installs and connects the end of the chain 201 to this connection 182a.

The chain 201 is a roller mechanism 203 temporarily installed on the lower flange of the support girder 153 and a roller mechanism 203 temporarily installed on the lower portion of the H-beam column 102 as shown in FIG. 28A. The bracket body 181 is lowered by releasing the chain 201 by operating the chain block 200 on the ground.

Alternatively, as shown in FIG. 28B, the chain 201 may be lowered using only the roller mechanism 202 temporarily installed on the lower flange of the support girder 153.

When the chain block 200 is operated, the chain 201 is supported by the roller mechanisms 202 and 203 and simultaneously moved while being guided. The bracket 201 can be lowered by the movement of the chain 201.

As such, after installing the support bracket 180, the support girder 153, and the beam formwork 110 at the height of the second underground layer, the deep deck 120 is installed in the same manner as the first underground layer, and then the formwork is performed. After reinforcing bars are reinforced in the beam and slab spaces formed by the 110 and the deep deck 120, concrete is poured at the same time to complete the construction of the beam BG2 and the slab BS2 of the second underground layer (FIG. 27E). Reference).

Thereafter, although not shown in the drawings, the above process is repeated to construct the beams and slabs of the third basement layer and the basement layer below, and the beams and slabs of each layer are constructed in steps while descending to the lower floor by the same method.

The beams and slabs of each basement layer constructed in this way are the shapes shown in FIGS. 1 to 4, that is, the one-way beam BG and the deck slab BS.

According to the configuration of the third embodiment of the present invention and the construction method of the underground structure using the same, it is not necessary to use the copper bar which caused various problems, and the concrete waste does not occur due to the non-installation of the discarded concrete, and the floor under construction The concrete slab is distributed evenly to the column through the supporting bracket, so that the upper slab does not apply excessive load to the prefabricated upper slab, and the upper slab only supports the load of the supporting formwork, the support girder and the support bracket when the suspension descends. After curing to some extent, it is possible to construct the lower floor and shorten the air.

As described above, according to the down-frame placing system and method for the one-way beam and deck slab construction of the basement according to the present invention, the beam formwork and the long span for building the one-way beam during the reverse construction of the beam and slab By using a gold deck type deep deck that can be applied, the following effects are obtained.

1) Since the formwork is installed only in one direction rather than horizontally or vertically, it can reduce the amount of cast concrete and reduce the amount of concrete waste.

2) By using the rotary roller mechanism, the work of lowering the formwork can be easily performed.

3) In the case of using the support bracket, it is not necessary to use copper scoops, no concrete waste occurs due to the non-establishment of the discarded concrete, and the structure is distributed evenly to the columns through the support bracket. If an excessive load is not applied to the slab and the upper slab is cured to some extent, the lower floor construction is possible and the air shortening is possible.

Claims (14)

In the method of reverse construction of the basement beam and slab, (a) after the ground excavation, the support is installed by supporting the dies in a group, but installed in a row in a plurality of rows as a whole in a continuous arrangement only in one horizontal or vertical direction; (b) supporting and installing a gold deck-type deep deck in which steel sheets are repeatedly bent as a slab formwork between side by side beam formwork; (c) constructing and curing concrete in the beam and slab space formed by the beam formwork and the deep deck to construct the one-way beam and deck slab; (d) After additional ground excavation, the beam formwork is lowered to the corresponding height downstairs by using roller mechanism to guide the lifting device and the lifting device's wires down the slab hole. Doing; (e) constructing and curing concrete in the beam and slab space to construct a one-way beam and deck slab of the lower floor; And (f) repeating steps (d) and (e) to construct a one-way beam and deck slab of the lower layer; Down-frame pouring method for one-way beam and deck slab construction of the basement floor comprising a. The method according to claim 1, The roller mechanism includes a lower insert portion having a support end installed on the outer circumference of the pipe-shaped insert body inserted into the slab through hole so that the upper end of the slab can be placed on the outer periphery of the slab through the outer periphery of the slab hole, and the roller support portion on the upper portion thereof. The one-way beam of the basement layer is characterized in that it is separated into an upper rotation part integrally coupled, and using a rotating structure having a bearing interposed between the outer periphery of the insert and the inner periphery of the rotating part so that the rotating part can be freely rotated at the inserting part. Down-frame pouring method for deck slab construction. In the method of reverse construction of the basement beam and slab, (a ') installing a support bracket on the exposed framework pillar after ground excavation; (b ') installing two support girders side by side between the pillars in such a manner as to support an end portion on the support bracket, and continuously installing the support girders in a longitudinal or longitudinal direction only; (c ') installing the beam formwork by supporting it on the support girder, and placing the beam form along the support girder so as to be installed in a plurality of rows in one direction as a whole; (d ') supporting and installing a gold deck-type deep deck in which steel sheets are repeatedly bent as a slab formwork between side by side beam formwork; (e ') constructing and curing concrete in the beam and slab space formed by the beam formwork and the dip deck to construct a one-way beam and deck slab; (f ') After additional ground excavation, the support bracket is dismantled and suspended from the column, and then reinstalled at the corresponding height downstairs, and the support girder is suspended with hydraulic lifts and suspension together with the support form, supporting girders and formwork Installing the deep deck at the height of the downstairs in the same manner; (g ') placing and curing concrete in the beam and slab space to construct a one-way beam and deck slab downstairs; And (h ') repeating steps (f') and (g ') to construct a one-way beam and deck slab of the lower layer; Down-frame pouring method for one-way beam and deck slab construction of the basement floor comprising a. The method according to claim 3, The support bracket may be two bracket bodies of a predetermined length made of H-shaped steel horizontally installed horizontally around the H-shaped steel pillar constructed as a frame pillar, and the two bracket bodies may be disassembled from the H-shaped steel pillar. While the one-way beam and deck slab construction method for the construction of a one-way beam and deck slab, characterized in that using a one-way support bracket for fixing to a predetermined height of the H-beam column. The method according to claim 3 or 4, The lowering of the support bracket, The connecting ring is installed on the reinforcing plate of each bracket body constituting the supporting bracket, the lower flange of the supporting girder or the roller mechanism is installed on the lower part of the H-beam column together with the lower flange, and then the chain of the chain block is Connecting to the connecting ring of the bracket body via the roller mechanism, and the downward frame placing method for the one-way beam and deck slab construction of the basement floor, characterized in that carried out by operating the dismantling bracket and chain block. The method according to claim 3, End plates are welded and installed at the ends of the support girders, and both end plates are fastened with bolts and nuts in the state of sandwiching the shim plate between the end plates of the front and rear support girders to integrally support the continuously arranged support girders. Down-frame pouring method for the construction of one-way beam and deck slab of the basement characterized in that connecting. In the down frame pouring system for reverse construction of the basement beam and slab, A structure for constructing one-way beams and deck slabs, A one-way support bracket installed at the corresponding height of the floor in each frame pillar; A support girder installed side by side between the pillars in a form in which an end is fixedly supported on the one-way support bracket, the support girder being continuously disposed in a horizontal or vertical one direction only; A support form installed on the support girder, the support form being long along the support girder and installed in a plurality of rows in one direction; Dip deck fabricated in the form of a gold deck, the steel plate is repeatedly bent as a slab formwork structure, the end deck is supported on the side of the formwork; Down-frame pouring system for one-way beam and deck slab construction of the basement floor comprising a. The method according to claim 7, The one-way support bracket, Two bracket bodies of a predetermined length made of H-shaped steel horizontally symmetrically installed horizontally around the H-shaped steel pillars constructed as frame columns, and the two bracket bodies can be dismantled from the H-shaped steel pillars while H- Down-frame pouring system for the construction of one-way beam and deck slab of the basement floor, characterized in that consisting of bracket fixing means for fixing to a predetermined height of the steel column. The method according to claim 8, The bracket fixing means, Two fastening plates each horizontally welded to both flange surfaces of the H-beams and bolted in a state of being joined to an upper surface of the upper flange of each bracket body; Two bed plates are welded and fixed horizontally to the top of the stop puller, and bolted in a state of being joined to the lower surface of the lower flange of each bracket body; A pair of stop pullers assembled to squeeze the flanges of the H-beam pillars on both sides to support the two bed bodies while supporting the two bed plates in the assembled position; Two stop plates welded to both flange surfaces of the H-beams to support the respective stop pullers from below; Down-frame framework placing system for one-way beam and deck slab construction of the basement floor comprising a. The method according to claim 9, The pair of stop pullers are joined to each flange surface of the H-beam column by the tightening force of the bolts and through-tightening bolts respectively inserted into both ends of the two stop pullers. Down-frame pouring system for the construction of one-way beam and deck slab of the basement floor, characterized in that it is fixed while pressing the ground. The method according to claim 9, The pair of stop pullers are underground structures to which the one-way girder system is applied by clamps which fix each stop puller to the flanges of the H-beams while being joined to each flange surface of the H-beams. Framing pour system for construction of concrete. The method according to any one of claims 9 to 11, The construction of the underground structure to which the one-way girder system is applied, wherein a reinforcing plate is welded between the flanges of the H-beams on the inner side of the portion where the upper and lower flanges of the two bracket bodies are joined in the H-beams. Framing pour system. The method according to claim 9, The bracket fixing means, Reinforced CT-beams which are installed in the upper and lower portions of the H-beams in two places, respectively; Two fastening plates each horizontally welded to two upper reinforcing CT-beam flange surfaces, and bolted in a state of being joined to an upper surface of the upper flange of each bracket body; Two bed plates are welded and fixed horizontally to the top of the stop puller, and bolted in a state of being joined to the lower surface of the lower flange of each bracket body; A pair of stop pullers assembled to squeeze the two lower reinforcement CT-shaped flanges on both sides to support the two bed bodies while supporting the two bed plates in the assembled position; Two stop plates welded to both ends of the flanges of the H-beams to support the respective stop pullers from below; Down-frame pouring system for the construction of underground structures to which the one-way girder system is applied, comprising a. The method according to claim 13, The pair of stop pullers are joined to the flange faces of the respective reinforced CT-beams by tightening bolts respectively inserted through both ends of the two stop pullers and the tightening force of the nuts fastened to the respective bolts. Downward frame placing system for construction of underground structures to which the one-way girder system is applied while pressing the flange surface.

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