KR20030060263A - PCCbridge beam and method of constructing the same - Google Patents

Abstract

PURPOSE: A pre-stressed concrete bridge beam is provided to assist the installation of bridge slab forms or parapet forms or safety nets by arranging bridge beams with long nuts embedded at regular distance, also to make the maintenance work easy and simple. CONSTITUTION: The construction process of pre-stressed concrete bridge beam is composed of: seating numbers of beams on a bridge pier(10); fixing a slab form(14) and a parapet form(17) by long blots passing through the access hole(135) of a beam(130) and through holes(136') of channels(136); fixing brackets(18) by bolts; fastening a vertical brace(18') by a supporting timber(18''); inserting a hook(137') to a long bolt(134) to be hung; putting the bolt into the lower access(135') hole of a beam; putting a timber(20) on to the hung hooks arranged at regular distances; putting steel pipes(21) across the timbers at regular distances; putting safety nets(19) on the steel pipes; placing concrete onto the slab forms and parapet forms.

Description

PCCbridge beam and method of constructing the same}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to beams for bridges, and more particularly to beams for beams and constructions having a structure that allows easy installation and maintenance of slab formwork, brackets, and safety nets after simple construction.

In general, in order to install a bridge, as shown in FIG. 1, by using a shoe block 11 and a bridge device 12 in a width direction on a bridge 10 erected at regular intervals. Both ends of the beam 13 are installed with the required number of beams 13 in a state in which the stake is placed on the cross-section device 12, and then the beams and the beams are in a horizontal state with the upper layer of the beams 13. The slab formwork 14 is laid in between, where the slab formwork 14 on which the slab formwork 14 is placed is bundled with an iron wire 15 'so that one end of the slab formwork 14 is projected to the reinforcing bar 16 protruding into the upper layer of the beam 13. The handrail formwork (cantilever = Canti lever) 17 binds the corner portions 18 'of the bracket foot 18 with iron wire 17', and welds them to the reinforcing bars 16, and vertical portions thereof. (18 ") is supported by the brace shell (18" ') between the side of the beam 13 to secure the bracket (18) correctly, and the safety net (1 In the case of 9), the lumber 20 is tied with the steel wire 20 'so that one end is also welded and fixed to the reinforcing bar 16 so as to be positioned at both lower surfaces of the beam 13, and the beam 13 and the beam 13 are placed thereon. Safety facilities steel pipe (pipe) 21 having a length of the seating and fixing the safety net (19) over it to prevent the safety accident by falling objects.

However, the lumber 15 of the slab formwork 14 and the bracket foot 18 of the railing formwork 17 and the steel pipe 21 of the safety net 19 which are installed in this manner are all high piers ( 10) As above, many manpower has been working for a long time, so it is difficult to increase construction cost, safety accident and maintenance after construction.

In addition, since the wires exposed after dismantling them must be cleanly cut, there is a problem of wasteing a lot of time for finishing.

However, above all, the lumber 15, 20 and the leg 18 'for installing the slab formwork 14, the handrail formwork 17 and the steel pipe 21 for the safety net 19 are provided with the wire 15' (17). Slab concrete that is cast because the tensile force applied to each of the iron wires 15 ', 17', and 20 'is not constant when it is bundled with' 20 'and welded to the rebar 16. Not only can the thickness of C) not be equalized, but also the same work cannot be done when performing repair work, so it is inevitable to rely on the primitive method of installing and repairing “Tong Buri”.

Accordingly, an object of the present invention is to form and manufacture a PCB by arranging the insertion and removal of long bolts at regular intervals on the upper and lower sides of the beam for easy and easy maintenance after installation and construction of slab formwork, handrail formwork, and safety net. It is to provide a beam for a bridge and its construction method.

The present invention in the manufacture of forming the beams for the PSC bridge beams when forming the beams for the PSC bridge using a steel form (Steel form) in order to solve the construction problems as in the prior art and to implement a remarkable effect on achieving the object It is easy to install slab formwork, balustrade formwork, and safety facilities safety net when constructing bridges by arranging inserting holes with long nuts at upper and lower sides of the beam at regular intervals. It can be easily carried out in the same way, it is characterized by the beam for the PSC bridge and its construction method that can reduce the construction cost and improve the safety and semi-permanent function according to the air shortening.

1 is a partial front view schematically showing the installation state of the slab formwork, bracket and safety net using a conventional beam

Figure 2 is an exploded perspective view of the configuration for fixing the "c" type channel, bracket and hook to the beam manufactured by the present invention as a bowl

Figure 3a is a partial perspective view of the beam formwork separating the main portion for forming the insertion hole in the beam according to the present invention

Figure 3b is a partial cross-sectional view of the beam forming state using the beam formwork according to the present invention

Figure 4 is a partial cutaway cross-sectional view of the construction of the "c" -shaped channel and the bracket and the safety net installed by the bolt and short pipe hook in the present invention

Figure 5 is a side cross-sectional view of the bridge constructed by the present invention

※ Explanation of symbols about main part of drawing ※

10-pier 14-slab formwork16-rebar

17-railing formwork 18-bracket foot 18'-part

18 "-vertical 18" '-brace lumber 19-safety net

20-beams21-steel pipes 130-PSC bridge beam

130'-steel form131-hole

132-Thread 133-Short Nut 134-Long Bolt

133'-long nut C-concrete

136- "C" channel 136 ', 136 "-through-137-ring

137'-hook

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

Herein, the present invention has been described with the same reference numerals for the same components as in the prior art.

First, the forming method of the PSC bridge beam 130 uses a steel formwork (Steel From) (130 '), by drilling a hole 131 at a predetermined position on the upper and lower sides of both sides of the steel formwork (130') at a predetermined position. However, after welding and fixing a short nut 133 having a screw hole 132 having the same diameter as the hole 131 on the outside thereof, a relatively long bolt through the screw hole 132 and the hole 131 is fixed. (Long Bolt) (134) after screwing the long bolt (134 ') protruding into the long bolt (134) protruding inward of the iron formwork 130' steel formwork in a state in which the long nut (133 ') screwed together ') After embedding reinforcing bar 16 to pour concrete (C) and curing the long bolt 134, the steel formwork (130') from the cured beam for beams 130 Removal can be performed easily.

The upper and lower sides of both sides of the molded PSC beam 130 are provided with insertion and insertion holes 135 and 135 ′ in which the long nuts 133 ′ can be fitted.

When constructing a bridge (not shown) with the molded PS beam 130 as described above, the slab formwork 14 for placing the slab concrete (C) in a state in which a plurality of seats are mounted on the piers 10 in the same manner as the conventional method. Handrail formwork 17 is a through-hole (136) drilled between the beam 130 and the "C" -shaped channel (136) between the insertion hole 135 formed on both sides of the beam 130 ') Is matched with the above-mentioned insertion hole 135 and screwed with a long bolt 134 and the bracket foot 18 matches the insertion hole 135 with the through hole 136 " After screwing with a long bolt 134, the vertical portion 18 "is supported by the brace angle 18" 'between the side of the beam 130 and installs the bracket 18 firmly.

In addition, the installation of the safety net 19 is screwed into the insertion hole 135 'formed on both sides of the lower side of the beam 130 by fitting the hook 137' having the ring hole 137 with a long bolt 134. Next, the slab concrete 14 is placed on top of the slab formwork 14 and the railing formwork 17 after the safety of the slab formwork is placed on the hook 137 ′ by placing the lumber 20 on which the steel pipe 21 having the safety net 19 is placed. (C) is to place the work, and when dismantling them after the construction can be carried out by a simple task of releasing (releasing) the long bolt 134 screwed by the insertion and removal holes (135) (135 ') as well as In the case of maintenance after construction, the repair and construction are easy in the same way as described above, and a beam and a construction method having a very useful structure for laying a bridge are provided.

As described above, the present invention allows the bridge to be formed at the time of forming and forming by inserting the boring hole which can facilitate the insertion and removal of the long bolts at regular intervals on both upper and lower side portions of the beam for the PSC bridge by the PS form. When installing, slab concrete is fastened by screwing it with a long bolt to fasten the hook which can hang the "c" shaped channel for installing slab formwork, bracket for installing formwork for railing and steel pipe of safety net for safety facilities. It is possible to carry out the construction work and to perform maintenance in the same way by using them, so it is possible to save labor costs, shorten the construction equipment, and increase the safety of construction. It is a useful invention to provide.

Claims (4)

In forming the PSC bridge beam 130 by using the steel formwork 130 ′, The long bolt 134 is screwed by fixing the short nut 133 having a screw hole 132 on the outside by matching the holes 131 drilled at regular intervals on both upper and lower side portions of the steel formwork 130 ′. After tightening, reinforcing steel in the steel formwork 130 ′ while screwing another long nut 133 ′ to the long bolt 134 protruding inward to pour concrete, and then curing the long bolt 134. Beam beam for the PSC bridge, characterized in that for removing and forming the mold (130 '). Using the long bolt 134 in the insertion and exit holes 135 and 135 'formed at both upper and lower side portions of the PCS beam beam 130, the "c" -shaped channel 136, the bracket claw 18 and the hook 137'. The method of using a beam for the PSSC bridge, characterized in that after the fastening and fastening the ring hole (137) of the slab formwork (14) and handrail formwork (17) and the safety net (19). The method of claim 2, The "c" shaped channel (136) is a construction method using a beam for the PSPS bridge, characterized in that the through hole (136 ') is used to be drilled at intervals coincident with the insertion hole (135) (135'). The method of claim 2, The bracket foot (18) is a construction method using a beam for the PSC bridge, characterized in that the through hole (136 ') to be used in the corner portion (18').