KR20040028221A - Support construction for slab of prestressed concrete beam of bridge - Google Patents

Abstract

PURPOSE: A temporary structure for supporting an upper slab of a P.S.C beam bridge is provided to prevent the corrosion of a slab bar, to install and dismantle a temporary structure easily, to prevent the wastes caused by constructing an upper slab and to shorten a period of construction. CONSTITUTION: The construction method of a temporary structure for supporting an upper slab of a P.S.C beam bridge comprises the steps of: placing a P.S.C beam(50) on a pier; installing a support frame(60), a lower slab support(70) and a cantilever lower support frame(110); installing a height adjustable support(80), an upper slab support(90) and a slab floor plate(100) on the lower slab support(70); if many P.S.C beams(50) are installed, placing a cantilever slab support(120) on both sides, then fastening to the P.S.C beams using fastening bolts(56,112); installing a slab side form(140) on the cantilever slab support(120) installed on both sides of the P.S.C beam(50); assembling a slab bar, then placing concrete; and dismantling the lower slab support, the cantilever lower backing frame, the length adjust support, the upper slab support, the slab floor plate, the cantilever slab support and the slab side form which support an upper slab.

Description

SUPPORT CONSTRUCTION FOR SLAB OF PRESTRESSED CONCRETE BEAM OF BRIDGE}

The present invention relates to a top slab temporary structure of a P. S. C-beam bridge, and more particularly, to provide a convenient and safe formwork construction of the formwork of a top slab of a P. S-beam bridge. The present invention relates to a temporary slab support structure for supporting slab of a P.S.C-beam bridge having a structure that can be shortened and can completely prevent the problem of corrosion after completion of construction since no wire (or wire) is used.

In general, in order to install the S-C beam beam slab, the steel is exposed to the rebar exposed on the upper surface of the S-C beam after the beam is mounted. The steel pipe is installed in the lower part of the beam to fix the connection, and the plywood is mounted on the steel pipe, and again, the plywood and the steel pipe are fastened and fastened.

Secure the working space of this temporary facility by mounting the slab pedestal using wood on the side of the P.S. beam and then installing the slab formwork on the top plate of the slab support, and on both sides of the P.S. beam. The cantilever support frame was fixed to half life to complete the installation of the temporary facility in the cantilever slab section.

1 is a construction diagram of a top slab temporary structure of a general PS-C beam beam, (a) is a flow chart showing the steps 1 to 4, (b) is a flow chart showing the steps 5 to 8. .

The first step is to mount the P.S.C-Beam to the pier, in which the pier is not shown in the drawing, in which the four P.S.C-Beams 10 are arranged horizontally above the pier. Is seated.

The second step is to install the steel pipe 12 at the lower part of the P.S.C-beam 10, i.e., in the longitudinal direction of the piers, so that the P.S.C-Beam is free of flow. 10 and the steel pipe 12 is fixed to the wire 14, the wire 14 is mainly used by using a wire.

The third step is to install the supporting plywood 16 between the four PS-beams 10 and the slab support wood 18 between the PS-beams 10. In the step, the supporting plywood 16 is seated between the four P.S.C-beams 10 and fixed to the steel pipe with a wire 14, and the slab supporting wood 18 is The horizontal support timber is formed at the bottom, while the vertical support timber is connected between the horizontal support timbers, and the lower horizontal support timber is longer than the upper horizontal support timber.

In the fourth step, the cantilever support frame 20 is installed on both sides of the PS-beam 10 so that the cantilever support frame 20 is fixed with wires so that the CS-beam 10 installed on both sides of the concrete is not flown. Step of installing the slab bottom plate 22 on top of the slab support wood 18.

The slab bottom plate 22 is often using a wooden plywood, the square wood is installed directly below the installation, the cantilever support frame 20 is fixed to the lower portion of the steel pipe and wire.

The fifth step is to install the side vertical formwork 24 so that the slab concrete is placed on the upper side of the cantilever support frame 20 to construct the upper slab.

The sixth step is to assemble the slab reinforcement 26 and pour concrete between the slab bottom plate 22 and the lateral side vertical formwork 24, i.e., horizontally and perpendicular to the P.S.C-beam 10. to be.

The seventh step is to dismantle the cantilever support frame, the slab support wood and the temporary structure after the curing of the concrete slab is completed.

At this time, the steel pipe 12 and the supporting plywood 16 installed in the upper portion of the pier is maintained as it is.

The eighth step is to dismantle the supporting plywood 16 and the steel pipe 12 at the bottom of the P. C-beam 10 and to cut the wire 14 to the P. In the step of completing the construction of the upper slab 28 on the top, it can be seen that the supporting plywood 16 and the steel pipe 12 has no reference number in the drawings.

The first step and the eighth step are indicated by dotted lines in order to explain a state in which the P.S.C-beam is seated on the pier.

As can be seen from the above-described flow chart, the disassembly of the supporting plywood 16 and the steel pipe 12 in the lower portion of the P.C-beam 10 is difficult and the worker may fall to the lower part of the piers during the operation. Due to the high risk of human accidents, the wire 14 on the bottom of the upper slab 28 is often used for the wire, the corrosion occurs when exposed to the air, the corrosion of the wire 14 is slab Corrosion to the reinforcing bar (26) is caused by the cracking of the concrete due to the expansion of the reinforcing bar leads to a defect of the slab of the slab, there is a problem such as deteriorating the safety of the bridge.

In addition, there is a problem in that the construction is complicated in the eight steps as described above, the process is complicated, and the construction period is long to dismantle and install the temporary facility.

In addition, the temporary facility used to construct the top slab 28 on the top of the P. C-beam (10) has a problem that the disposal cost of the waste is increased because it is treated as a waste because a lot of wood is used after demolition. .

The present invention, in order to solve the above problems, the present invention, the formwork structure of the upper plate slab of the P. S. C-beam bridge can be convenient and safe to install and shorten the construction period, the wire (or wire It is an object of the present invention to provide a temporary slab support structure for supporting slab of P.S.C-Beam Bridge which has a structure that can completely prevent the problem of corrosion after completion of construction.

1 is a construction diagram of a top slab temporary structure of a general P. S. C-beam bridge, (a) is a flow chart showing the first to four stages, (b) is a flow chart showing the five to eight steps.

Figure 2 is a production conceptual diagram showing the top slab temporary structure of the P. S. C-beam bridge of the present invention.

3 is a construction diagram of the upper slab temporary structure of the P.S.C-beam bridge of the present invention, (a) is a flow chart showing the steps 1 to 4, (b) shows a five to seven steps Flowchart.

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

50: P.S.C-Beam 52: C-beam

54,58,132: Tightening bolt hole 56,112: Tightening bolt

60: lower support frame 70,90: upper and lower slab support

80: length adjustment base 100: slab bottom plate

102: bent portion 110: cantilever lower support frame

120: cantilever slab pedestal 130: grid panel

136: slab reinforcement 140: slab side formwork

150: top slab

In order to achieve the above object, the present invention, the P. S. C-beam 50, the upper portion of the piers in the state in which the c-shaped steel 52 is fixed to the fastening bolt 56 on both sides of the lower side in the longitudinal direction While the majority is mounted on the P. S. C-beam 50 of the male bone, the P. S. C-beam 50 mounted on the outer side in the width direction is fastened to one side of the upper portion. A bolt hole 58 is formed, and a fastening bolt hole 54 is formed in the C-shaped steel 52 fixed to the lower portion of the P.S.C-beam 50 so as to penetrate the inside thereof. The lower support frame 60 and the lower slab pedestal 70 are integrally formed between the seed beams 50 and the lower support frame 60 is inserted into the c-beam 52 to be seated. The lower slab pedestal 70 is provided with a plurality of length adjustment pedestal 80 at the top, the upper slab pedestal 90 is bolted to the upper portion of the length adjustment pedestal 80 or The welded and fixed, the slab bottom plate 100 is seated on the upper portion of the upper slab pedestal 90, the slab bottom plate 100 is bent portion 102 is formed on both sides of the width direction, P. S. The c-beam (50) of the c-beam (52) is fastened with a fastening bolt 112 of the long diameter in the state in which the cantilever lower support frame (110) made in the shape of F is inserted in a lying state, the cantilever lower support frame (110) When the cantilever slab pedestal 120 is installed on one side of the upper portion, the lower portion is fastened by the fastening bolt 56, while the cantilever slab pedestal 120 has an upper portion of the P.S.C-beam 50. The fastening bolt 56 is fastened and fixed to the fastening bolt hole 58, and the slab side formwork 140 is welded or bolted to the cantilever slab pedestal 120 at an upper portion thereof. The upper part of the slab base 120, the slab bottom plate 100 is installed in contact Concrete is poured into the top plate slab 150 to provide a structural structure for supporting the top plate slab of the P. S. C-beam bridge, characterized in that configured to be constructed.

Hereinafter, with reference to the accompanying drawings will be described the configuration and operating state of the present invention.

Fig. 2 is a production conceptual diagram showing the top slab temporary structure of the P.S.C-beam bridge of the present invention.

As can be seen in Figure 2, the P. S. C-beam bridge is installed on the top of the pier, the concrete slab is installed by mounting the P. S. C-beam (50) in the upper portion of the bridge, the installation of the temporary structure It shows the concept to say well.

The longitudinal side of the P.S.C-beam 50 in advance when the P.S.C-beam 50 is mounted on the top of the piers when two (or four) can be mounted. While the c-beams 52 are coupled to the fastening bolts 56, the fastening bolt holes 54 are formed in the c-beams 52 coupled with the P. C-beam 50 to penetrate the inside thereof. In the above P.S.C-beam 50, fastening bolt holes 58 are formed on one side thereof, respectively.

The lower support frame 60 is formed in the state where the lower support frame 60 is inserted into the c-beam 52 between the two P.S.C-beams 50, and the lower support frame 60 and the lower slab supporter ( 70 is integrally formed of a steel structure.

The lower slab pedestal 70 has a plurality of length adjustment pedestal 80 is seated on the upper side, the length adjustment pedestal 80 is a general support structure that can adjust the height in relation to use a lot in construction sites in detail Description is omitted.

The upper slab pedestal 90 is formed on the upper portion of the length adjustment pedestal 80 is made of a steel structure, the slab bottom plate 100 is coupled to the upper portion of the upper slab pedestal 90, in particular the The length adjustment pedestal 80, the upper slab pedestal 90 and the slab bottom plate 100 are manufactured in an integrated structure, and the pier upper P.S.C-beam 50 is attached to the pier by using lifting equipment such as a crane. Is installed between.

The slab bottom plate 100 has a bent portion 102 formed to be inclined on both sides in the width direction (shape of shear on the drawing), when the concrete slab is installed when constructing the top slab It is appropriate to install so as to be different by the height of the upper slab pedestal 90 so that the thickness between the spaced apart than the thickness of the upper slab of the upper portion of the upper 50.

In the two P.S.C-beams 50, the cantilever lower support frame 110 is fastened to the fastening bolt hole 54 of the c-shaped steel 52 by the fastening bolt 112. The lower support frame 110 is manufactured in an F shape and inserted and coupled between the c-shaped steels 52 installed in a laid state.

The cantilever slab pedestal 120 is installed on one side of the cantilever slab pedestal 110, that is, the side on which the P.S.C-beam 50 is mounted, while the cantilever slab pedestal 120 is a right triangle. The cantilever slab pedestal 120 has a rectangular steel structure formed in a right triangle structure, and the grid-shaped panel 130 is welded to the upper portion of the horizontal square steel to be integrally formed, and the grid-shaped panel ( 130, a fastening bolt hole 132 is formed on a vertical surface and fastened to the upper part of the P.S.C-beam 50 by fastening bolts 56, and the upper surface is galvanized to adhere to each other during concrete pouring. It is formed so as not to.

That is, the cantilever slab pedestal 120 has an upper portion fixed to the upper portion of the P.S.C-beam 50 by a fastening bolt 56 having a short diameter, and the lower portion thereof is seated on the upper portion of the cantilever lower support frame 110. It is a structure that is fastened with a fastening bolt 112 of the long diameter in the state.

At this time, the P.S.C-beam 50 is fastened horizontally to the c-beams 52 by the fastening bolt 56 of the small diameter on both lower sides, the P.S.C-beam 50 Fasten the cantilever slab supporter 120 with a small fastening bolt 56 on the upper side, while the above C. C-beam 50 uses long fastening bolts 112 on both sides of the c-shaped steel ( 52), the cantilever lower support frame 110, the cantilever slab pedestal 120 is vertically fastened, when constructing the concrete slab to construct the upper slab to configure the temporary support from the bottom.

The cantilever slab pedestal 120 is vertically supported by welding or bolting the slab side formwork 140 on the upper side, wherein the slab side formwork 140 has a structure in which a support bar is formed on the side of the vertical panel to form concrete. It is configured to keep the city side vertical.

As described above, the P.S.C-beam 50 has a lower support frame 60, a lower slab support 70, a length adjustment bracket 80, an upper slab support 90 and a slab bottom at the top. The plate 100 is installed, and the P.S.C-beam 50 is provided with a cantilever lower support frame 110, a cantilever slab pedestal 120 and a slab side formwork 140 on both sides as a temporary structure. The above members are all formed of a steel structure.

3 is a construction diagram of the upper slab temporary structure of the P.S.C-beam bridge of the present invention, (a) is a flow chart showing the steps 1 to 4, (b) shows a five to seven steps Flowchart.

The first step is to mount the PS-beam 50 to the top of the piers (not shown in the figure), the c-beams 52 are fastened to the side of the PS beam. A plurality of the pier is seated in the fastened state (56).

The second step is to install the lower support frame 60, the lower slab pedestal 70 and the cantilever lower support frame 110 in the state that the four S-beam 50 is seated on the upper piers, When the plurality of P.S.C-beams 50 is installed, the lower support frame 60 is inserted between the c-shaped steels 52 between the lower slab pedestals 120, and the P.S. The C-beam 50 seats the cantilever lower support frame 110 in a laid form, respectively, on both sides of which a plurality of seams are installed.

The third step is a step in which the length adjustment pedestal 80, the upper slab pedestal 90 and the slab bottom plate 100 are sequentially installed on the lower slab pedestal 70.

At this time, the length adjustment pedestal 80, the upper slab pedestal 90 and the slab bottom plate 100 may be formed in an integrated structure or formed by each member to be fixed in the upper piers using equipment such as cranes, etc. Although it may be, in consideration of the safety of the workers it would be preferable to use the integral structure formed.

The fourth step is to mount the cantilever slab pedestal 120 on both sides in the width direction when a plurality of P.S.C-beam 50 is installed, and then using fastening bolts 56 and 112 of small diameter and long diameter. It is the step of fastening to the PS-beam.

The fifth step is to install the slab side formwork 140 on top of the cantilever slab pedestal 120 provided on both sides in the width direction of the P.S.C-beam 50.

At this time, the slab side formwork 140 is fastened by welding or fastening bolts on the upper portion of the cantilever slab pedestal 120.

The sixth step is to assemble the slab reinforcing bars 136 and to cast concrete to construct the upper slab.

The seventh step is to dismantle the lower slab pedestal, cantilever lower support frame, length adjustment pedestal, upper slab pedestal, slab bottom plate, cantilever slab pedestal and slab side formwork supporting the upper slab 150 in the reverse order.

From the first to the seventh step described above is a sequence for smooth construction, it will be apparent that the two steps can be performed simultaneously in consideration of the efficiency of the work if necessary.

The provisional structure having the above-described configuration is a provisional structure used when constructing a slab of a new bridge, which is not for maintenance of the bridge, and each member is designed to shorten the construction period by preventing damage of the provisional structure during operation. It is formed of a steel structure with excellent support, and cantilever slab pedestal 120 is used on the side of the P.S.C-beam 50 to improve the workability of the workers.

The effect of the configuration and operation of the present invention described above will be described.

The temporary slab supporting structure of the PS S-beam bridge of the present invention is installed at the top of the pier with the anchor bolt hole installed at the side of the PS S-beam and fastening the c-beams with the fastening bolts. After the majority of the CS beams are mounted, temporary structures are installed between the sides of the PS beams and between them. Such temporary structures do not use any half-life as in the prior art. It is possible to prevent the corrosion of slab reinforcement, which has emerged as a problem after dismantling of the temporary structure structure, to completely solve the problem of cracking of the slab of the top slab, and also to easily construct and dismantle the temporary structure. Can be.

In addition, since the temporary structure is constructed by using steel structures, it is possible to fundamentally prevent the generation of waste generated after the construction of the top slab by not using wood as in the prior art, and thus shorten the construction period as compared to the prior art. The effect can be obtained.

Claims (2)

For supporting the top slab of the P.S.C-Beam bridge, which is installed when the S.C-Beam is mounted on the top of the pier and then concrete is placed on top of the P.S.-Beam. In the temporary structure, The PS beam (50) is mounted on the upper portion of the piers in the state in which the c-beam (52) is fixed to the fastening bolt 56 on both sides of the lower side in the longitudinal direction, A fastening bolt hole 58 is formed in one upper surface of the P.S.C-beam 50 mounted on the outer side in the width direction of the P.S.C-beam 50 of the head. A fastening bolt hole 54 is formed at the lower portion of the S-beam 50 fixed to the S-beam 50 so as to penetrate the inside thereof. The lower support frame 60 and the lower slab pedestal 70 are formed integrally coupled between the P.S.C-beam 50 of the bone, and the lower support frame 60 is formed inside the c-beams 52. ) Is inserted and installed in a seated shape, The lower slab pedestal 70 is provided with a plurality of length adjustment pedestal 80 at the top, the upper slab pedestal 90 is bolted or welded to the upper portion of the length adjustment pedestal 80, The slab bottom plate 100 is seated on the upper portion of the upper slab pedestal 90, the slab bottom plate 100 is bent portion 102 is formed on both sides of the width direction, The C-beam (50) of the C-beam (50) is fastened by the fastening bolts 112 of the long diameter in the state in which the cantilever lower support frame 110 made of F-shape is inserted in a lying state, When the cantilever slab pedestal 120 is installed on one side of the cantilever lower support frame 110, the lower portion thereof is fastened with the fastening bolt 112, while the cantilever slab pedestal 120 has an upper portion thereof. The fastening bolt 56 is fastened and fixed to the upper fastening bolt hole 58 of the beam 50, and the slab side formwork 140 is welded or bolted to the cantilever slab pedestal 120 at the top of the slab side. Formwork 140, the cantilever slab pedestal 120, the slab bottom plate 100 is installed on the upper portion in which the concrete is poured to the top plate slab 150, characterized in that configured to construct the P.S.C-beam Temporary structure for supporting slabs of bridge decks. The method of claim 1, The slab bottom plate 100 has a bent portion 102 formed inclined on both sides in the width direction, when the concrete slab is installed in the state in which the temporary structure is installed, when constructing the top slab 150, ps. It is installed between the P. C. C-beam 50 so as to be different by the height of the upper slab pedestal 90 so that the thickness of the upper slab between the spaced apart than the thickness of the upper slab of the upper portion of the beam 50 is smaller. A temporary structure for supporting a slab of a top plate of a P.S.C-beam bridge.