KR20020036198A - A temporary bracket for construction of precast concrete beam bridge and the temporary work method using the same - Google Patents

Abstract

PURPOSE: A construction bracket for PC beam bridge and construction method thereof is provided to complete a construction frame on an upper portion of a bridge for mounting a supporting post, a safety net, and a scaffold, so that it is easy to install slab concrete and to maintain a bridge. CONSTITUTION: The construction bracket for PC beam bridge comprises a pair of supporting means(10) divided into a horizontal part(15) having a squared pipe shape and a vertical part(11) having a hollow(12); a pair of fixing means(20a) inserted into the hollow(12) of the vertical part(11) to be supported and fixed and; a connecting means having a squared pipe shape which is inserted into the horizontal part(15) to connect and support the fixing means(20a) with controlling the space between the supporting means(10). The fixing means(20a) fix the supporting means(10) in various manners according to the contact portion with the PC beam, and select from an oblique fixing means and a straight fixing means.

Description

A temporary bracket for construction of precast concrete beam bridge and the temporary work method using the same}

The present invention relates to a PC beam bridge hypothesis bracket and a PC beam bridge construction method using the same. More specifically, the construction of slab concrete and the maintenance of the bridges are completed by completing the temporary frame on the upper part of the pier by simply assembling with horizontal members in the construction of the PC beam bridge, which is difficult to work in the air, and installing the copper bar, the safety net, and the working platform on the temporary frame. It is about the hypothesis bracket for PC beam bridge and PC beam bridge hypothesis method using the same.

In general, the construction method for slab casting to the upper part of the pier constructed in the bridge construction is selected in consideration of various comprehensive factors such as the type of bridge, site topography, height of construction, traffic conditions under the bridge, air and construction cost.

Conventionally, as a temporary construction method for installing the upper structure, the copper barrier method for installing slabs for placing slab concrete on the upper part of the bridge using the system support, etc. To cut the wires and install the copper bar on the upper part of the wooden copper bar method or the upper bar of the PC beam, and lower the wire to cross the lower part of the PC beam to install the lumber or short pipe scaffolding to the iron wire and install the copper bar on it again. Hanging technique has been mainly applied.

However, the method of installing copper barges from the bottom of the pier requires a lot of materials and manpower as the height of the construction height increases, and the geometry space must be secured as a construction space. It is difficult to choose as a temporary construction method for bridges installed in the upper part.

On the other hand, the wood copper lumber method is made by installing the workbench and copper bar at the required interval on the lumber spanned between the flanges of both PC beams, and then assembled the slab formwork with plywood or the like. Wood has good workability and low initial cost, but the rigidity of the member itself is not good, so it should be installed a lot at narrow intervals. It is cut easily according to the installation site or angle, and it is easily damaged by repeated installation and dismantling work. As the quantity needs to be replenished, the construction cost is increased. In addition, there are inherent problems in construction, such as when the beams are sandwiched between the flanges of both PC beams, and the fixing of the beams is not firm and sometimes the PC beams are pushed over during installation of the beams.

In the hanging method of lowering steel wire and tying a lumber or a short pipe scaffold and installing a copper bar on it, the safety of the strength and the bundle of the wire bundling the lumber or a short pipe scaffold may cause a safety accident.

Therefore, the present inventors can easily install a copper bar, work scaffolding or safety net on the pier upper part while eliminating the above-mentioned drawbacks as described above, and are made of steel, which allows for excellent workability and economical operation, and for the maintenance of bridges. We have developed a construction beam bracket for PC beam bridge that can be applied to construction work and PC beam bridge construction method.

The object of the present invention is to complete the construction of the temporary frame on the top of the pier by simply assembling with horizontal members in the construction of a PC beam bridge construction difficult to work in the air, and install slab concrete, safety nets or working scaffolding above the temporary frame, maintenance of slab concrete and bridge maintenance It is to provide a PC beam bridge hypothesis bracket and a PC beam bridge hypothesis method using the same for the scaffold installation that can be easily performed.

Another object of the present invention is to allow the installation of the copper bar at the top of the bridge, girder height from the bottom of the bridge piers can be installed to the PC beam bridge hypothesis bracket and PC beam bridge hypothesis that can be expected to reduce the material cost and labor costs To provide a way.

Another object of the present invention is to enable safe construction work by using steel materials that are more durable and rigid than wood and have a high capacity ratio, which can reduce construction waste and continue to be used exclusively for PC beams that are manufactured and manufactured according to standard designs. Therefore, it is possible to provide a construction beam bracket for PC beam bridge which can be economically constructed, and a PC beam bridge construction method using the same.

1 is a front view (a) and a perspective view (b) of a specific example of the temporary beam for the PC beam bridge of the present invention.

2 is a front view (a) and a perspective view (b) of another embodiment of the temporary beam bracket for PC beam bridge of the present invention.

3 is a perspective view of a PC beam having a side cross section.

4 is a cross-sectional view of the PC beam bridge construction bracket of FIG. 1 in a PC beam having a cross section of FIG.

FIG. 5 is a cross-sectional view of the PC beam bridge construction temporary bracket shown in FIG. 2 mounted on a PC beam having a cross section of FIG.

6 is a detailed cross-sectional view of the PC beam bridge construction brackets and horizontal members provided with the PC beams in FIGS.

FIG. 7 is a front view of a bridge showing a state in which construction works have been performed using the temporary beams for PC beam bridges of FIGS. 1 and 2 in the PC beam bridge.

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

1: Pier 2: PC Beam

2a: flange 2b: web

5: PC beam replacement hypothesis bracket 6: formwork

7: dong 8: slab

9: horizontal member 10: supporting member

11: vertical part 12: hollow

13a, 13b: Fastener 15: Horizontal part

20a, 20b: fixing member 23a, 23b: coupling hole

25: fixed pin 26, 36: thread

27, 37: nut 30: connecting member

The present invention will be described with reference to the drawings.

1 and 2 are a front view and a perspective view of a specific example of the PC beam bridge construction bracket of the present invention, the PC beam bridge construction bracket 5 of the present invention is a pair of supporting members 10, a pair of fixing members 20a, 20b and the connecting member 30 are configured.

The supporting member 10 is an inverted T-shaped member and is divided into a vertical portion 11 having a hollow 12 and a horizontal portion 15 of an angular pipe type, and the side surface of the flange 2a of the PC beam in the PC beam bridge. The vertical portion 11 and the horizontal portion 15 are installed to abut the lower surface. The fixing members 20a and 20b and the connecting member 30, which will be described later, are inserted into the hollow 12 and the horizontal part 15 of the vertical part 11, respectively.

The fixing members 20a and 20b are inserted and fixed and supported in the hollow 12 of the vertical portion 11 of the pair of supporting members, and one end surface or the lower surface of the fixing members 20a and 20b is a PC beam. The web 2b or the flange 2a is fixed to and installed on the flange 2a of the PC beam together with the support member 10. 3 is a perspective view of a PC beam having a side cross section. In general, a PC beam 2 for a bridge has the same side cross section at both ends according to a standard design, and a cross section is made while the flanges of the PC beam maintain the same inclination angle. . In addition, the fixing members 20a and 20b may be manufactured such that the fixing position to the supporting member 10 may be changed in fluidity so that the fixing members 20a and 20b may be adapted in any cross-sectional state. 4 and 5 illustrate a state in which the fixing position of the fixing member is fixed to the supporting member 10 while the fixing position of the fixing member is fluidly changed according to the positions of a and b having different cross sections in FIG. 3.

The fixing members 20a and 20b may have different fixing methods with the supporting member 10 according to the crimping portion with the PC beam 2.

FIG. 1 illustrates a case in which the lower surface of the fixing member uses a diagonal fixing member 20a having an inclined surface at the same angle as the inclined surface of the flange of the PC beam. The fixing member 20a is supported by the fixing member 25 only. 10 shows a state of being coupled and fixed. In general, in the case of L-30m manufactured with a PC beam for bridges, considering the cross-sectional dimension, the angle of the inclined surface of the flange is tan ^-1 (220/230), which is approximately 43.43 degrees, and this value is a diagonal fixing member 20a. The inclination angle of the lower surface of the is determined.

As shown in FIG. 4, since the oblique fixing member 20a is pressed against the flange 2a of the PC beam even if it is not pressed against the web 2b of the PC beam, the fixing pin 25 alone is sufficient for the PC beam 2. It can be fixed to the support member 10 while being fluidly adapted to the end face. A plurality of coupling holes 23a are formed in the diagonal fixing member 20a, and a coupling hole 13a is formed in the vertical portion 11 of the support member so as to coincide with the coupling hole 23a. When the diagonal fixing member 20a is inserted into the hollow 12 of the vertical portion 11 of the support member, the fixing pin 25 is inserted at a predetermined position where the fastening hole 13a and the coupling hole 23a meet. The member 20a is firmly fixed to the support member 10. Since the diagonal fixing member 20a as described above is pressed and fixed to the flange 2a of the PC beam, it is more effectively and stably fixed and installed than the straight fixing member 20b described later.

2 is a case where the fixing member uses a straight fixing member 20b installed in parallel with the horizontal portion 15 of the supporting member, and is fixed using the nut 27 as a separate fixing means together with the fixing pin 25. The state in which the member 20b is coupled to and fixed to the support member 10 is illustrated.

As shown in FIG. 5, since the straight fixing member 20b is fixed to the web beam 2b of the PC beam and is caught and fixed at a portion where the web 2b and the flange 2a of the PC beam meet, the freely moving side to side is required. It is possible to adapt flexibly to the edges of. The coupling hole 23b is formed to the left and right in the straight fixing member 20b, the thread 26 is formed on the outside thereof, and a plurality of fastening holes 13b are formed in the vertical portion 11 of the support member. When the straight fixing member 20b is inserted into the hollow 12 of the vertical part 11 of the supporting member, the fixing pin 25 is fitted at a predetermined position where the fastening hole 13b and the coupling hole 23b meet. After determining the nut 27 is fixed to the support member 11 by fastening the nut 27 to the thread 26 of the straight fixing member 20b in one or both directions.

The connecting member 30 is an angular pipe-shaped member, which is inserted into both horizontal portions 15 of the pair of supporting members, connects and supports the pair of supporting members 10 without twisting, and is used as a PC. According to the size of the beam (2) is produced to adjust the gap between the pair of supporting members (10). In a specific embodiment, the threads 36 are formed on the outer edges of both ends of the connecting member 30 so that the connecting member 30 is inserted into the horizontal portion 15 of the pair of supporting members, and then the nut 37 is inserted. The pair of support members 10 are connected and supported by fastening to the screw thread 36. At this time, the gap between the pair of supporting members 10 is determined according to the degree to which the nut 37 is fastened to the screw thread 36. When the horizontal member 9 of the circular steel tube, the square steel tube, or the shaped steel is inserted into the connecting member 30 of the square pipe type, the horizontal member 9 is placed between the PC beams 2.

6 is a detailed cross-sectional view of the PC beam bridge hypothesis bracket 5 and the horizontal member 9 of the present invention installed on the PC beam (2), Figure 7 is a PC beam bridge hypothesis bracket (5) In the front view of the bridge in the state where the temporary work was performed using), the following hypothesis method is explained.

When the pier construction work is completed in the PC beam bridge, when the PC beam (2) is installed at regular intervals on the pier (1), the construction work for placing the slab (8) concrete, the upper structure begins. PC beam of the present invention such that the pair of supporting members 10 and the pair of fixing members 20a, 20b compress the web 2b or flange 2a of the PC beam on both sides while adjusting the connecting member 30. Install and fix the teaching temporary bracket (5). Subsequently, when the horizontal member 9 is inserted into the connection member 30 of the temporary beam for the PC beam bridge, the horizontal member 9 is placed between the PC beam 2 and the PC beam 2.

If the copper bar 7 is installed on the horizontal member 9, the formwork 6 for concrete placing the bridge slab 9 can be installed. In this case, the copper bar 7 is continuously installed along the PC beam 2 at the height of the upper part of the pier, that is, from the lower part of the PC beam 2 to the upper part, and the safety net or the working platform on the horizontal member 9 without additional scaffolding installation work. If you install the installation work is completed. When the pier upper structure is completed, it is dismantled by working against the installation of temporary structure. Even in the maintenance of the bridge can be installed by installing the PC beam bridge temporary bracket 5 in the same way as described above.

Using the PC beam bridge temporary bracket and the PC beam bridge temporary method using the same of the present invention to complete the temporary frame on the upper part of the bridge by simply assembling with the horizontal member in the bridge construction difficult to work in the air, the construction, safety net or work scaffolding over the temporary frame By installing the concrete slab and the maintenance of the bridge can be easily performed. In addition, it is possible to install a copper bar at the top of the pier and to the girder height from the system pier bar from the lower part of the pier, thereby reducing material and labor costs. In addition, since the present invention uses steel instead of wood, safe construction work is possible while reducing construction waste, and steel is economical in bridge construction where the installation and dismantling of temporary construction is repeated because the material is excellent in durability and rigidity and has a high capacity. Enable construction

Claims (5)

An inverted T-shaped member comprising a pair of supporting members 10 divided into a vertical portion 11 having a hollow 12 and a horizontal portion 15 of an angular pipe type; A pair of fixing members 20a and 20b inserted into and fixed in the hollow 12 of the vertical portion 11 of the pair of supporting members; And, An angular pipe-type connecting member 30 inserted into both horizontal portions 15 of the pair of supporting members to connect while adjusting the distance between the pair of supporting members 10; PC beam bridge hypothesis bracket comprising a. The method of claim 1, wherein the fixing member (20a) is a plurality of coupling holes (23a) formed at a predetermined interval and the lower surface is a diagonal member inclined at the same angle as the inclined surface of the flange (2a) of the PC beam, A plurality of fastening holes 13a are formed in the vertical portion 11 of the support member at predetermined intervals so that the fixing pin 25 is inserted into a predetermined position where the fastening holes 13a and the coupling holes 23a meet. Temporary bracket for PC beam bridge, characterized in that the fixing member (20a) is fixed and supported while being adjusted to the support member (10). The method of claim 1, wherein the fixing member (20b) is a straight member formed with a long coupling hole (23b) to the left and right and the thread 26 on the outside, A plurality of fastening holes 13b are formed at regular intervals in the vertical portion 11 of the support member to insert the fixing pin 25 at a predetermined position where the fastening holes 13b and the coupling holes 23b meet. PC beam bridge hypothesis, characterized in that the fixing member 20b is fixed and supported while being adjusted to the supporting member 10 by fastening the nut 27 to the thread 26 of the straight fixing member 20b in one or both directions. Brackets. According to any one of claims 1 to 3, The connecting member 30 is formed with a thread 36 on the outer edge of both ends of the pair of fastening the nut 37 to the thread 36 by supporting a pair of Temporary bracket for PC beam bridge, characterized in that connecting while adjusting the distance between the members (10). If a plurality of PC beams (2) is installed on the top of the bridge (1) of the completed bridge, Installing a plurality of PC beam bridge hypothesis brackets (5) so as to be in close contact with and fixed to a flange or a web of the PC beam (2); Inserting a horizontal member (9) into the connection member (30) of the temporary beam (5) for the PC beam bridge, thereby forming the horizontal member (9) between the PC beam (2) and the PC beam (2); And, Installing a plurality of clubs (7) at regular intervals on the horizontal member (9); PC beam bridge hypothesis method comprising a.