KR100807276B1 - Slab construction method using reinforcing bar slab formwork - Google Patents

Abstract

The present invention relates to a slab construction method using a reinforced steel slab formwork combined with a reinforcing truss, and more specifically, to complete the slab formwork from the plate formwork to the slab formwork without the need to install the copper bar can be carried out simply slab construction It is about a slab construction method.

The slab construction method using the reinforcing bar slab formwork of the present invention comprises the steps of: (a) completing a plurality of reinforcing bar type slab formwork; (b) arranging a plurality of platelet formwork in parallel to complete a large formwork; (c) installing double beams on both sides of the base formwork (LF) so as to be simultaneously caught on each of the lower chords or the top chords of the parallel rebar trusses; (d) lifting the slab formwork with a crane while lifting the concession beam and installing it in the slab position; (e) curing the slab concrete onto the base formwork; And (f) demolding the slab formwork of the large formwork while dropping the fixing tool.

Description

Slab construction method using slab form with truss bar}

1 is a view showing a single reinforcing bar slab formwork according to the present invention.

Figure 2 is a view showing various embodiments of the connector and the fixture for binding the slab formwork and the reinforcing truss in the reinforcing bar type slab formwork according to the present invention.

3 to 6 is a view showing a slab construction method using a reinforced bar slab formwork according to the present invention.

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

100: reinforced truss 110: present

120: present 130: web ash

200: slab formwork 300: connector

310: reinforcing bar 320: female thread

400: fixture 500: support

SF: plate formwork LF: plate formwork

LB: Double B

SC: Slab Concrete

The present invention relates to a slab construction method using a reinforcing bar truss combined slab formwork, and more specifically, to complete the slab formwork from the plate formwork to the slab formwork without the need to install the copper bar, so that the slab construction can be carried out simply It is about a slab construction method.

Reinforced concrete structure is the most common structural method integrating reinforcement with concrete. Reinforced concrete works are carried out by installing formwork, reinforcing reinforcing bars and placing concrete. In particular, the installation process of the formwork is essential to the installation process of the formwork for slab construction. In other words, for the slab construction, the material is brought into the construction location, and then the formwork is installed and the reinforcing bar is reinforced while supporting it with the copper bar according to the design at the construction site, followed by curing the concrete and dismantling the mold and the copper bar.

However, since the copper barriers need to check the support while adjusting their height directly on site, apart from the formwork installation, the installation work is quite cumbersome. In addition, since the copper bar can be removed only after sufficient curing of concrete is performed, work on the floor in which the copper bar is installed is limited due to problems in securing a working space. In addition, the construction of a multi-storey building is made while transporting the temporary materials used in the lower layer to the upper layer, where the copper group is large and the size of the member causes inconvenience in material transportation. In this way, the installation process of copper bar is one factor that lowers the construction efficiency in overall work in reinforced concrete construction.

In order to improve the slab construction method using the above-mentioned copper cladding, a method using a truss deck of pre-assembled reinforcing bars was proposed while using slab formwork as a permanent formwork. Normally, the truss deck is manufactured by assembling reinforcing bars by inserting non-rendil trusses into warren-type trusses and welding them to an iron plate, or by assembling reinforcing bars in a triangular truss method having a foot extending downward from the lower chord. It is common to be manufactured by the method of welding to the iron plate, all of these manufacturing methods are proposed in consideration of the coating thickness of the rebar.

However, such a method using the truss deck is accompanied by disadvantages, such as the steel plate is exposed and the antirust treatment and fireproof coating is required, and the construction cost is increased because it is difficult to recycle the slab formwork.

Thus, the present inventors have improved the conventional truss deck to develop a reinforcing bar type slab formwork that does not need to install the copper bar while using the slab formwork for removal instead of the iron plate.

The present invention has been made to improve the above-mentioned conventional problems, it is possible to sufficiently support the self-loading and concrete load, as well as concrete placing pressure and work load of the member itself, the site is simple by using the reinforced slab formwork that does not need to install the copper bar The technical objective is to provide a slab construction method that enables economical construction.

It is another object of the present invention to provide a slab construction method that allows the slab construction to proceed with a simple slab formwork from the plate formwork to the slab formwork easily removable from the slab formwork.

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In order to achieve the above object, the present invention is composed of one upper chord, two lower chords, and a pair of web members which obliquely connect the upper chords and the lower chords, wherein the web material forms a continuous waveform in an upper portion. A reinforcing truss where the floor of the floor meets the upper chord and the lower valley meets the lower chord; A slab formwork disposed spaced below the lower chord of the reinforcing truss, the through-hole of which is formed; A connector which is disposed on the slab formwork through hole and binds to the lower chord of the reinforcing truss; And, a fixture disposed to pass through the hole under the slab formwork and detachably coupled to the connector, wherein the reinforcing bar type slab formwork is configured to include:
(a) completing a plurality of the one-piece slab formwork with plate formwork; (b) arranging a plurality of platelet formwork in parallel to complete a large formwork; (c) installing double beams on both sides of the base formwork (LF) so as to be simultaneously caught on each of the lower chords or the top chords of the parallel rebar trusses; (d) lifting the slab formwork with a crane while lifting the concession beam and installing it in the slab position; (e) curing the slab concrete onto the base formwork; And, (f) demolding the slab formwork of the large formwork while dropping the fixture; provides a slab construction method using a reinforced slab formwork, characterized in that it comprises a.

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

1 is a view showing a single reinforcing bar slab formwork according to the present invention, the present invention comprises a reinforcing truss 100, a slab formwork 200, the connector 300 and the fixture 400, According to the support 500 may be configured to further include.

Reinforcing truss 100 is one upper chord 110, two lower chords (120, two lower chords are suitable to be arranged at intervals of about 6cm) and the upper chord 110 and the lower Consists of a pair of web material 130 connecting the present 120 inclined, the pair of web material 130 is arranged in both directions to form a continuous waveform while the upper floor meets the upper chord 110 and The lower valley is joined to meet the lower chord 120. The reinforcing truss 100 serves to support the concrete placing load and the work load in the process of placing the slab concrete, and after placing the slab concrete, serves to exhibit structural strength as the slab reinforcing bar. In the reinforcing truss of the present invention, the reinforcing bar is usually used in reinforcing concrete structures, including circular reinforcing bars, deformed reinforcing bars, iron wires, etc., but considering the ease of manufacturing, it is manufactured by adopting upper and lower chords and web materials as steel wires. It is desirable to.

In the present invention, the reinforcing truss 100 is configured so that the corrugated web material 130 nodes (floor and valleys) directly meet the upper chord 110 and the lower chord 120, which is used for concrete placing and working load. It is considered to fully support the lateral displacement of the upper chord (110) subjected to the compression by, because the node (floor and valley) of the corrugated web material 130 directly meets the upper chord (110) and the lower chord (120). Load transfer from the 110 to the lower chord 120 is made smoothly to reduce the secondary moment and deflection of the upper and lower chords. This is different from the reinforcing truss applied to the conventional truss deck (assembled steel is bonded to the steel plate). Conventional truss decks have a triangular truss shape (the lower valley of the corrugated bevel positioned below the lower chord) with a foot in which the warp member (web material) extends below the lower chord to maintain the coating thickness with the bottom plate. Reinforced truss was adopted, but the reinforced truss generated secondary moment and deflection in the upper and lower chords. In the present invention, the nodes (floor and valley) of the corrugated web material 130 are arranged to meet the upper chord 110 and the lower chord 120 to maximize the load transfer between the top chord 110 and the bottom chord 120. Solving the problems inherent in the conventional reinforcement truss, in particular, because the connector 300 arranged on the left and right of the two lower chords to support the lower chord 120 while securing the coating thickness The lateral displacement of the 110 can be efficiently supported. The rebar truss 100 of the present invention is self-standing because it is made up of a single top chord 110 and two bottom chords 120 and the web material 130 is made of a complete triangle, especially the field assembly is very easy have.

The slab formwork 200 is disposed below the lower chord 120 of the reinforcing truss, the through-hole is formed in the plane. Since the slab formwork 200 can be reused in the future demoulding it has an advantageous effect on reducing the overall construction cost. The slab formwork 200 may use any material such as plywood, iron plate.

The connector 300 is installed to be coupled to the lower chord 120 of the reinforcing truss while being disposed above the slab formwork 200 through the member having a larger size than the slab formwork 200 through the hole. The provision of the connector 300 allows the fixed arrangement of the reinforcing truss 100, as well as securing the coating thickness through the separation distance between the reinforcing truss lower chord 120 and the slab formwork 200. In addition, the connector 300 enables to adopt the reinforcement truss 100 (the form in which the corrugated web material nodes (floor and valley) coincide with the upper chord 110 and the lower chord 120) as described above.

The connector 300 may be manufactured by selecting a material such as metal, plastic (particularly, PVC), but considering that the lower surface of the connector 300 is exposed when the slab formwork 200 is demolded after the slab construction. It is preferable to select a plastic. 2 shows various types of connectors 300, which will be described later.

Fixture 400 is a member that is disposed to pass through the hole under the slab formwork 200 to be detachably coupled to the connector 300, the slab formwork 200 according to the coupling with the connector 300 It serves to fix or demould. In other words, when the fastener is bound to the connector, the slab formwork is installed on the reinforcement truss by the connector, and when the fastener is dismantled from the connector, the slab formwork is detached from the reinforcement truss and thus the mold can be demolished. The fixture 400 may be manufactured by selecting a material such as metal, plastic (particularly, PVC), similar to the connector 300.

The fastener 400 may be composed of a tie pin that is integrally extended with the connector 300 and inserted into the slit hole of the tie bar having passed through the through hole of the tie bar and the slab formwork 200 formed with a slit hole, After forming the female screw hole in the connector 300 as shown in Figure 2 it is preferable to provide a fastening bolt to the fastener 400 for a solid yet easy coupling.

On the other hand, the present invention proposes to further include a support 500 in a configuration similar to the connector 300, the support 500 is disposed on the slab formwork 200 while the lower chord 120 of the reinforced truss It is installed to support the) serves to ensure the stability of the reinforcing truss 100, such a support 500 is different from the connector 300 in that it does not bind to the fixture 400.

In particular, the support 500 is a lower chord (120) of the reinforcing truss at both ends of the slab formwork 200 after the end of the web material 130 of the reinforcement truss as shown in Figure 1 to be bonded to the lower chord 120. It is preferable to install so that the end of the web material (130) to the bonded portion. The reinforcing bar slab formwork of the present invention will be installed while being mounted on a support such as a bobbin or a bracket, which has already secured a stable support state. Since it will be delivered to both ends through the end as it will be delivered to the support, if you install the support member 500 on both ends of the slab formwork to install the end of the web material 130 of the lower chord 120 of the reinforcing truss This is because it can be expected to achieve stable load transfer from the web material 130 of the reinforcement truss to the support 500 again. Of course, it is possible to consider the installation of a similar connector 300 instead of the supporter 500, but since the fastener 400 is necessarily bound to the connector 300, the fixture 400 in the lower end of both ends of the slab formwork 200 If is installed, it is difficult to mount on the support in that state, which is not appropriate.

2 is a view showing various embodiments of the connector 300 and the fixture 400 for binding the slab formwork 200 and the reinforcing truss 100 in the reinforcing bar type slab formwork according to the present invention. In the embodiment both the fastener 400 is provided to be composed of the reinforcing bar binding portion 310 of the upper end to which the lower chord 120 of the reinforcing truss is bound and the female threading portion 320 of the lower end formed with the female threaded hole (400) It is an example adopted as a tightening bolt for screwing the female thread portion 320 of the connector, and is divided according to the shape of the reinforcing bar 310 of the connector and the lower chord 120 of the reinforcing truss and the method of binding the reinforcing bar.

2 (a) is an example in which the reinforcing bar 310 of the connector is formed as a seating groove so that the lower chord 120 of the reinforcing truss is fitted and seated, the lower chord 120 of the reinforcing truss is seated in the seating groove. This is an example of binding with the reinforcing bar binding portion 310. In particular, in Figure 2 (a) is provided so that the through-holes are formed at the same position on both sides of the seating groove, and further provided with a fastening pin 315 to be fitted into the through-hole to combine the lower chord 120 of the reinforcement truss 315 is being processed so as not to leave the seating groove.

Figure 2 (b) is the same as Figure 2 (a) as a whole, but instead of the mounting groove, the reinforcing bar portion 310 of the connector is formed by protruding the guide wings in twin lines so that the lower chord 120 of the reinforcing truss is installed leaning There is a difference. Of course, as shown, the twin-row guide wings are provided so that the through-hole is formed at the same position on both sides, and further provided with a fastening pin 315 to be fitted into the through-hole, the lower chord 120 of the reinforced truss is fastening pin 315 can be processed so as not to escape from the twin-row guide wings.

Figure 2 (c) is the same as Figure 2 (a) as a whole, but instead of the seating groove, the reinforcing bar portion 310 of the connector is configured to be provided with a more U-shaped cover that is fixed while covering the lower chord 120 of the reinforcing truss There is a difference in that. In FIG. 2 (c), the coupling pins 315 are inserted into the through holes while the U-shaped covers are formed to be formed at the same positions on both sides of the lower truss lower chord 120 so as to prevent their separation.

FIG. 2 (d) shows an example in which the lower chord 120 of the reinforcing truss is welded to the twin-row guide blade as a modification of FIG. 2 (b), and FIG. The lower chord 120 of the rebar truss is welded to the guide vanes. Although not shown, of course, the lower chord 120 of the reinforcing truss and the connector 300 may be directly welded to the reinforcing bar 310 of the connector by binding the lower chord 120 and the connector 300. have.

3 to 6 is a view showing a slab construction method using a reinforced bar slab formwork according to the present invention.

(a) the plate formwork completion step-Figure 3

A plurality of the above-mentioned reinforced bar slab formwork is completed by platelet formwork (SF). That is, to prepare and assemble the slab formwork 200 and the reinforcing truss 100, and the connector 300 and the fixture 400. Of course, the platelet formwork (SF) will be able to complete easily assembled on site. At this time, the size of plate formwork (SF) is suitable to transport two workers as a pair when assembling in the field without using the equipment, in Figure 3 plate plate in the state arranged the reinforcement truss 100 in three rows Show the formwork (SF).

(b) the base formwork completion step-Figure 4

A large number of plate formwork (SF) is arranged in parallel to complete the large plate formwork (LF). As shown in Figure 4 (a) by providing a cradle to the slab formwork (SF) of the slab formwork to be in close contact with each other to complete the large formwork (LF). In this step, as shown in Figure 4 (b) may include the step of reinforcing the reinforcement bar (B) intersecting the parallel reinforcement truss 100, the platelet form (SF) between each other as the reinforcement of the reinforcement bar (B) Tight coupling can be achieved, which enables the completion of large formwork (LF) without fear of disassembly.

Since the completion of the plate formwork to the large formwork can be proceeded by laminating the finished formwork from the above, it is expected that a large amount of the formwork can be completed in a narrow place without disrupting the construction process.

(c) the step of setting up concession- Figure 5

A double beam (LB) is installed to be simultaneously caught by each of the lower chord 120 or the upper chord 110 of the parallel rebar truss. Due to the installation of the double beam (LB) it is possible to tight coupling between the platelet formwork (SF) mutual, and stable lifting is possible through the distribution of the weight of the weight. It is preferable to adopt a member having excellent bending performance as the double beam (LB), and may be removed in the future, but may be a buried member that is permanently embedded in slabs such as steel bars and steel frames.

Particularly, in the present invention, as shown in Fig. 5, two upper chords L1, one lower chord L2, two web chords L3 and two chords connecting the upper chord and the lower chord, as shown in Figs. It is proposed to adopt reinforcing truss including the connecting material (L4) to connect the phase currents of each other, and two such double beams (LB) are prepared, and the reinforcing truss of the lower truss (L2, especially web material) The bonded portion) is installed on both sides of the plate formwork LF so as to be fitted to the end of the upper chord 110 of the parallel reinforcement truss of the plate formwork LF. In other words, the two double beams (LB) on both sides of the large formwork (LF) so that the reinforcement truss lower chord (L2) of the double beam (LB) is caught on the end of the upper chord 110 of the parallel reinforcement truss (LF). If it is inserted into the upper stringer (L1) of the two reinforcement trusses of the double beam (LB) and connected to the outer upper string by hooking the hook of the crane on the hook, then the weight center of gravity is the hook of the crane. The connecting string will be pulled while being positioned in the middle of the plate formwork (LF) where the ring is located, and when the connecting string is pulled, the inner upper current (L1) of the two reinforcing trusses of the double beam (LB) The parallel reinforcement truss will be supported while pressing on the upper chord 110, whereby the position of the double beam (LB) is fixed while stable lifting operation is made. At this time, since the two reinforcement trusses L1 of the double beams LB are connected and reinforced with each other by the connecting member L4, the reinforcement truss upper chords L1 of the double beam LB are generated during the lifting process. Compression buckling can be suppressed.

(d) step of lifting the formwork for the board-Figure 5

Lifting the double beam (LB) while lifting the base plate formwork (LF) with a crane and installed in the slab position. If the temporary temporary member is adopted as a double beam (LB), such as a reinforced truss type double beam, it will be necessary to remove the double beam (LB) in this step. After installing the base formwork (LF), it is preferable to further reinforce the joint reinforcing bar connecting the base formwork with each other.

(e) Slab concrete pouring curing step-Figure 6

Slab concrete (SC) is poured onto the formwork (LF).

(f) slab formwork (200) demolding stage

When the slab concrete (SC) is cured, the slab formwork 200 of the base formwork is demolded while dropping the fixture 400. As a result, the reinforced concrete slab is completed, and the reinforced truss 100, the connector 300, and the supporter 500 are embedded in the reinforced concrete slab.

Although the present invention has been described in detail with reference to the described embodiments, those skilled in the art to which the present invention pertains will be capable of various substitutions, additions and modifications without departing from the technical spirit described above. It is to be understood that such modified embodiments also fall within the protection scope of the present invention as defined by the appended claims below.

According to the present invention as described above can be expected the following effects.

First, the present invention fully supports the self-loading of concrete and concrete load as well as concrete placing pressure and working load by using reinforcing bar trusses of corrugated web material bonded to upper and lower chords as assembled reinforcing bars coupled to slab formwork. This makes it possible to install slabs easily and quickly without installing copper bars.

Secondly, the present invention allows the slab construction to be easily completed while the slab formwork and the reinforcement truss can be easily completed from the plate formwork to the large formwork by hand by a worker.

Third, the present invention can be completed as a large-sized formwork while laminating the formwork formwork in the field, it is possible to proceed with the slab construction while completing a large number of formwork in a narrow place without any obstacle to the construction process.

Claims (10)

delete delete delete delete delete delete delete It consists of one upper chord 110, two lower chords 120, and a pair of web members 130 that inclined the upper chord 110 and the lower chord 120, the web material ( 130 is a reinforcing truss 100 is joined so that the upper floor meets the upper chord 110 and the lower valley meets the lower chord 120 while forming a continuous waveform; A slab formwork 200 disposed below the lower chord 120 of the reinforcing truss and having a through hole formed in the plane; A connector 300 which is disposed on the slab formwork through hole and binds to the lower chord 120 of the reinforcing truss; And, As a method of constructing a slab using a reinforced integral slab formwork comprising a; fastener 400 is disposed to pass through the hole under the slab formwork 200 to be detachably coupled to the connector 300, (a) completing a plurality of the one-piece slab formwork with platelet formwork (SF); (b) arranging a plurality of platelet forms (SF) in parallel to complete a plate formwork (LF); (c) installing double beams (LB) on both sides of the base formwork (LF) so as to be simultaneously caught on each of the lower chord 120 or the top chord 110 of the parallel rebar truss; (d) lifting the plate formwork LF with a crane while lifting the double beams LB and installing them in the slab position; (e) curing the slab concrete (SC) onto the base formwork (LF); (f) demolding the slab formwork 200 of the base formwork while dropping the fixture 400; Slab construction method using a reinforcing bar integral slab formwork, characterized in that comprises a. In claim 8, The step (b) is a slab construction method using the integral reinforcing slab formwork, characterized in that comprising the step of reinforcing the reinforcement bar (B) intersecting the parallel rebar truss (100). In claim 8, In the step (c), two upper chords L1, one lower chord L2, a web material L3 connecting the upper chord and the lower chord, and two upper chords with double beams LB By adopting the reinforcement truss including the interconnecting member (L4) to interconnect the reinforcement truss lower chord (L2) of the double beam (LB) to the end of the upper chord (110) of the parallel reinforcement truss of the large formwork Done, The step (d) is a slab construction method using the integral steel slab formwork, characterized in that comprising the step of removing the reinforcement truss of the double beam (LB).

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