KR101222620B1 - Prestressed concrete girder and it's manufacture and construction method which used pretensioning steel plate - Google Patents

Abstract

PURPOSE: A pre-stressed concrete girder using a pre-tensioning steel plate, a manufacturing method and a bridge construction method thereof are provided to improve the stability of a pre-stressed concrete girder and to lower the height of the form of the pre-stressed concrete girder by reducing deflection and vibration and enhancing crack safety. CONSTITUTION: A manufacturing method of a pre-stressed concrete girder(G) using a pre-tensioning steel sheet comprises the following steps: inserting a steel connector consisting of the top/bottom flanges and a web into a concrete form; arranging a sheath pipe; installing a pre-tensioning steel sheet attached with an anchorage device on the lower surface of the center part of the concrete form; arranging and straining a PS(Pre-Stressed) steel wire for pre-tension onto a fixing device; forming a concrete girder by pacing and curing concrete on the concrete form; cutting the PS steel wire for pre-tensioning; inserting the PS steel wire for post-tensioning into the sheath pipe; and introducing the pre-stressing by post-tensioning into the PS steel wire.

Description

Prestressed concrete girder and it's manufacture and construction method which used pretensioning steel plate}

The present invention relates to a prestressed concrete girder using a pretensioned steel sheet and a method for manufacturing and constructing the same, in addition to the prestressing by the post-tensioning method in the prestress introduction process during the production of the prestressed concrete girder, the upper structure of the bridge The present invention relates to a prestressed concrete girder using a pretensioned steel sheet for introducing prestressed by a process of pretensioning the pretensioned steel sheet, and a method of fabricating and constructing the bridge.

In the conventional prestressed concrete girder bridge, a large number of sheath pipes are embedded in the concrete girder, and after the PS steel wire is installed in the sheath pipe, prestressing is performed by introducing a tension force into the PS steel wire.

However, as the span of the prestressed concrete girder bridge becomes longer and longer, the required tension is increased, so a large amount of PS tension material is required, so that the PS tension material installed in the prestressed concrete girder increases, and installs a plurality of tension anchors for fixing the PS tension material. Since the space at the end of the prestressed concrete girder is so narrow that the tension fixing port is installed in the side of the prestressed concrete girder rather than the end of the prestressed concrete girder.

Such prestressed concrete girder bridges have a disadvantage of increasing the manufacturing cost due to the complicated formwork, and the difficulty of the work is increased by the side tension of the prestressed concrete girder, and also the reinforcement of the complex reinforcing bars for reinforcing the post-tensioning tension anchors This is done.

In addition, in the case of the composite ramen bridge, since the connecting steel for connecting the constant moment member and the right angle member is provided at the end of the prestressed concrete girder, the installation area of the tension anchorage is narrowed by the connecting steel, and a plurality of PS It is difficult to place the tension material.

Accordingly, the present invention has been made to solve the problems described above, in the prestress introduction process during the production of prestressed concrete girder, which is the upper structure of the bridge, in addition to the pre-stressing by the post-tension method in addition to the pre-tensioned steel sheet An object of the present invention is to provide a prestressed concrete girder using a pretensioned steel sheet and a method of fabricating and constructing a bridge using a pretensioned steel sheet to introduce prestress by a pretensioning process.

Prestressed concrete girder using the pre-tensioned steel sheet according to the present invention for achieving the above object is inserted into the formwork, the upper steel, the lower flange and the abdomen connecting steel, arranging the sheath pipe, on the lower surface of the central part of the formwork Install a pretensioned steel plate with a fixing device, arrange the pretensioning PS steel wire in the fixing device, strain the pretensioning PS steel wire, and cast and cure concrete in the formwork to form a concrete girder; And cutting the pretension PS steel wire, inserting the post tension PS steel wire into the sheath tube, and introducing the post tension PS steel wire by pre-stressing by post tensioning.

In addition, the prestressed concrete girder manufacturing method using a pre-tensioned steel sheet according to the present invention for achieving the above object comprises the steps of manufacturing a connecting steel consisting of upper, lower flange and abdomen; Inserting the connecting steel into the formwork, arranging the sheath pipe, and installing a pretensioning steel plate having a fixing device attached to a lower surface of the central part of the formwork, and disposing a pretensioning PS steel wire in the fixing device; Tensioning the pretensioned PS steel wire; Placing and curing concrete in the formwork to form a concrete girder; Cutting the PS steel wire for pretensioning; After the post-tensioned PS steel wire is inserted into the sheath tube, the post-tensioned PS steel is characterized in that it comprises the step of introducing pre-stressing by post-tensioning.

And prestressed concrete girder bridge construction method using a pre-tensioned steel sheet according to the present invention for achieving the above object is inserted into the formwork, the sheath pipe is placed, the fixing device is located on the lower surface of the central part of the formwork Installing an attached pretensioning steel plate and fixing the pretensioning PS steel wire to the fixing apparatus; Tensioning the pretensioned PS steel wire; Placing and curing concrete in the formwork to form a concrete girder; Cutting the PS steel wire for pretensioning of the concrete girder; Inserting the post-tensioned PS steel wire into the sheath tube, and then introducing the pre-stressed post-tensioned PS steel wire by post tensioning to produce a prestressed concrete girder using pre-tensioned steel sheet; Manufacturing a rigid member formed of a predetermined shape while being composed of an upper, a lower flange and an abdomen; Transporting the prestressed concrete girder and the rigid member to the site using the pretensioned steel sheet; Constructing a wall portion on the ground; Installing a rigid member on the wall portion; Inserting a prestressed concrete girder using a pretensioned steel sheet between the rigid members, attaching a connecting plate to the connection steel of the prestressed concrete girder using the rigid member and the pretensioned steel sheet, and fastening with high tension bolts; Installing a cross beam between prestressed concrete girders using the pretensioned steel sheet; Placing concrete and curing the prestressed concrete girder using the steel member and the pretensioned steel sheet to form spheres and slabs; It is characterized by constructing a ramen bridge by sequentially performing the steps of placing and curing asphalt or concrete on the slab.

As described above, the prestressed concrete girder using the pre-tensioned steel sheet according to the present invention and its manufacturing and bridge construction method has the following effects.

First, the present invention improves the complexity and the manufacturing cost of the formwork causing the PS tension member and the side tension fixing installation problem due to the large amount of tension required, which is a problem of the conventional prestressed concrete girder, to improve the economic efficiency and workability There is an advantage.

Second, since the rigidity of the prestressed concrete girder is increased by the pretensioned steel sheet, sagging and vibration are reduced as compared to the prestressed concrete girder where the pretensioned steel sheet is not installed at the bottom of the prestressed concrete girder compared to the same span. In addition, the safety of the prestressed concrete girder is improved by increasing the crack safety, and the effect of lowering the mold height of the prestressed concrete girder is improved.

Thirdly, the present invention reduces the required number of post-tensioning tension anchors by using prestressed concrete girder, and minimizes tension anchors at the ends of the prestressed concrete girder, thus facilitating the installation of connecting steel, thus easily prestressed concrete bridges. It can work.

1 is a front view showing a prestressed concrete girder using a pretensioned steel sheet according to the present invention,
2a to 2e is a process chart showing a process of manufacturing a prestressed concrete girder using a pre-tensioned steel sheet according to the present invention,
3 is a front view showing a state in which a prestressed concrete girder using a pretensioned steel sheet according to the present invention is installed,
4 is an end detail view showing a state in which a prestressed concrete girder using a pretensioned steel sheet according to the present invention is installed;
5 is a detailed view of the central part showing a state in which a prestressed concrete girder using a pretensioned steel sheet according to the present invention is installed;
6 is a central cross-sectional view showing a state in which a prestressed concrete girder using a pretensioned steel sheet according to the present invention is installed,
7 is an end cross-sectional view showing a state in which a prestressed concrete girder using a pretensioned steel sheet according to the present invention is installed,
8a to 8i are process drawings showing a process of constructing a ramen bridge with a prestressed concrete girder using a pretensioned steel sheet according to the present invention;
9 is a front view showing a continuous ramen bridge installed with a prestressed concrete girder using a pretensioned steel sheet according to the present invention,
10 is a front view showing a prestressed concrete girder bridge using a pretensioned steel sheet according to the present invention.

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

[Prestressed Concrete Girder Using Pretensioned Steel Sheet]

1 is a front view illustrating a prestressed concrete girder using a pretensioned steel sheet according to the present invention.

As shown in this figure, the prestressed concrete girder (G) using the pre-tensioned steel sheet according to the present invention is formed of a connecting steel (upper, lower flanges 12, 14 and the abdomen 16 in the form 26 ( 20 is inserted, the sheath tube 24 is disposed, a pretensioning steel plate 30 having a fixing device 32 attached to the lower surface of the central portion of the formwork 26 is installed on the fixing device 32. The pre-tension PS steel wire 40a is disposed, the pre-tension PS steel wire 40a is tensioned, and the concrete is cast and cured in the form 26 to form a concrete girder C, and the pre-tensioning The PS steel wire 40a is cut, a post tension PS steel wire 40b is inserted into the sheath tube, and the post tension PS steel wire 40b is prepared by introducing prestressing by post tension.

Prestressed concrete girders (G) using the pre-tensioned steel sheet according to the present invention having the configuration as described above in addition to the pre-stressing by the post-tension method in the pre-stress introduction process during the production of the pre-stressed concrete girder, the upper structure of the bridge The prestress is introduced by the process of pretensioning the pre-tensioned steel sheet 30 and placed in the prestressed concrete girder, thereby improving the rigidity, thereby improving the load capacity and usability of the prestressed concrete girder when supporting the working load. It is done.

That is, the prestressed concrete girders (G) using the pre-tensioned steel sheet according to the present invention is a pre-tensioned steel plate (20) attached to the formwork 26, the sheath pipe 24 and the fixing device (32) 30), the prestressing PS steel wire 40a is disposed on the fixing device 32, the prestressing PS steel wire 40a is tensioned, and concrete is cast and cured on the formwork 26. After the concrete girder (C) is formed, the PS steel wire 40b for post tension is inserted into the sheath tube 24, and the PS steel wire 40b for post tension is produced by introducing prestressing by post tension. .

Here, the connecting steel 20 is an I beam or an H beam consisting of upper and lower flanges 12 and 14 and the abdomen 16.

In addition, the said pretensioned steel plate 30 is a rectangular plate-shaped object which has a uniform thickness as a whole.

Here, the fixing device 32 is formed integrally by bending at a right angle at the lower end of the vertical plate 33 and the vertical plate 33 made of a rectangular plate-like body having a constant thickness and width, the vertical plate 33 of It consists of a side plate 35 which is welded over both ends and the both ends of the pre-tensioned steel sheet 30, the steel plate insertion hole 36 is formed in the vertical plate 33 through the front and rear surfaces.

That is, the fixing device 32 is formed in the shape of a triangular bracket consisting of the vertical plate 33, the pre-tensioned steel plate 30 and the side plate 35 so as to resist the wire tension tension, of the fixing device 32 The steel plate insertion hole 36 is formed in the vertical plate 33 so that the PS steel wire 40a for pretension can be sufficiently fixed using a fixing wedge or the like.

In addition, the upper and lower surfaces of the pre-tensioned steel sheet 30 is provided with a shear connecting material 37 for synthesis with concrete.

[Manufacturing Method of Prestressed Concrete Girder Using Pretensioned Steel Sheet]

Hereinafter, the preparation of the prestressed concrete girder using the pre-tensioned steel sheet according to the present invention having the configuration as described above will be described.

Figures 2a to 2e is a process chart showing a process of manufacturing a prestressed concrete girder using a pre-tensioned steel sheet according to the present invention.

As shown in these drawings, the prestressed concrete girder manufacturing method using the pre-tensioned steel sheet according to the present invention comprises the steps of manufacturing the connecting steel 20 consisting of the upper, lower flanges 12, 14 and the abdomen 16 ; Insert the connecting steel 20 into the formwork 26, arrange the sheath tube 24, and then install the pretensioned steel plate 30 having the fixing device 32 attached to the lower surface of the central part of the formwork 26. And disposing a pretensioned PS steel wire 40a in the fixing device 32; Tensioning the pretension PS steel wire 40a; Placing and curing concrete in the formwork (26) to form a concrete girder (C); Cutting the PS steel wire 40a for pretensioning; After the post-tension PS steel wire 40b is inserted into the sheath tube 24, the post-tension PS steel wire 40b is introduced with pre-stressing by post-tensioning.

That is, in the method of manufacturing prestressed concrete girder using the pretensioned steel sheet according to the present invention, after installing the sheath tube 24 and the like for post tensioning around the pretensioned steel sheet 30, the formwork 26 is installed. Since a plurality of formwork 26 can be installed in the longitudinal direction, the fixing device 32 of the pretensioning steel plate 30 of the adjacent prestressed concrete girder G is connected to the PS steel wire 40a for pretensioning. Tension is transmitted.

Thereafter, after the concrete is poured into the mold 26, the prestress is introduced into the concrete of the prestressed concrete girder while the tensile force introduced to the end of the pretensioned steel sheet 30 is removed by the detensioning process of releasing the tension force. do.

 At this time, the support for supporting the formwork 26 of the prestressed concrete girder is to be sufficiently arranged in the prestressed concrete girder so that the tensile stress does not occur in the lower edge of the prestressed concrete girder by the weight of the concrete.

When the detensioning process is completed, support points for guiding the prestressed concrete girder to the simple support at the end of the prestressed concrete girder are introduced, and additional prestress by post-tension method is introduced by introducing a tension force from the pre-installed tension anchor. To complete.

A fixing device 32 is installed at an end portion of the pretensioning steel plate 30 installed in the prestressed concrete girder so as to face each other. The fixing device 32 is a vertical plate 33 made of a rectangular plate-like body having a predetermined thickness and width. ) And the lower end of the vertical plate 33 are integrally formed at right angles, and are formed of the pretensioned steel plate 30 having a predetermined thickness and width, and both ends of the vertical plate 33 and the pretensioned steel plate 30. It consists of a side plate 35 which is welded across both ends, the vertical plate 33 is formed through the front and rear surface through the steel wire insertion hole 36, the upper and lower surfaces of the pre-tensioned steel sheet 30 to be combined with concrete Shear connector 37 is installed.

[Prestressed Concrete Girder Bridge Construction Method Using Pretensioned Steel Sheet]

3 is a front view illustrating a state in which a prestressed concrete girder using a pretensioned steel sheet according to the present invention is installed, and FIG. 4 is an end portion illustrating a state in which a prestressed concrete girder is installed using a pretensioned steel sheet according to the present invention. 5 is a detailed view of a central portion showing a state in which a prestressed concrete girder using a pretensioned steel sheet according to the present invention is installed, and FIG. 6 is a prestressed concrete girder using a pretensioned steel sheet according to the present invention. 7 is an end cross-sectional view illustrating a state in which a prestressed concrete girder using a pretensioned steel sheet according to the present invention is installed, and FIGS. 8A to 8I illustrate a pretensioned steel sheet according to the present invention. Process showing the process of constructing ramen bridge with prestressed concrete girder using A.

8B is a step of introducing a predetermined tensile stress to the pretensioned steel sheet 30 as a result of tensioning the pretensioned steel sheet 30 by the pretensioning method of the fixing device 32, and FIG. Tensile stress is introduced at the lower edge of the center of the concrete girder C through detensioning (primary prestressing), and a tensile stress is introduced at the upper edge, and a predetermined compressive stress is introduced to the pretensioned steel sheet 30 to introduce the tension introduced in FIG. 8B. This is where the stress is partially offset.

8E shows post-tensioning (secondary prestressing) in which the additional compressive stress is introduced at the lower edge of the center of the concrete girder C, the additional tensile stress is introduced at the upper edge, and the predetermined compression stress is introduced to the pretensioned steel sheet 30 to tension. The stress is partially canceled and tensile stress is generated in the PS steel wire.

Immediately thereafter, when the self-weight of the concrete girder (C) is applied, tensile stress is applied to the lower edge of the center of the concrete girder (C), compressive stress is applied to the upper edge, and additional tensile stress is introduced to the steel and the PS steel wire.

8i is hypothesized that the upper concrete composite load and the working load are applied to the tensile stress at the lower edge of the center of the concrete girder (C), the compressive stress is introduced at the upper edge, and additional tensile stress is introduced to the steel and PS steel wire.

As shown in these drawings, the prestressed concrete girder bridge construction method using the pre-tensioned steel sheet according to the present invention after inserting the connecting steel 20 in the formwork 26, the sheath pipe 24 is disposed, Installing a pretensioning steel plate (30) having a fixing device (32) attached to a lower surface of a central portion of the mold (26), and fixing the pretensioning PS steel wire (40a) to the fixing device (32); Tensioning the pretension PS steel wire 40a; Placing and curing concrete in the formwork (26) to form a concrete girder (C); Cutting the PS steel wire 40a for pretensioning of the concrete girder C; After the post-tensioned PS steel wire 40b is inserted into the sheath tube 24, the pre-stressed concrete girder (G) using pre-tensioned steel sheet is introduced by introducing pre-stressing the post-tensioned PS steel wire 40b by post tensioning. Manufacturing); Manufacturing a rigid member 50 having an upper shape, a lower flange and an abdomen, and having a predetermined shape; Transporting the prestressed concrete girder G and the rigid member 50 to the site using the pretensioned steel sheet; Constructing the wall part 60 on the ground; Installing a rigid member (50) on the wall (60); A prestressed concrete girder G using a pretensioned steel sheet is inserted between the rigid members 50, and the connecting steel 20 of the prestressed concrete girder G using the preformed steel sheet 50 and the pretensioned steel sheet. Attaching the connecting plate 70 to the fastening bolt 72; Installing a cross beam 80 between the prestressed concrete girders G using the pretensioned steel sheet; Placing concrete and curing the prestressed concrete girder (G) using the rigid member 50 and the pretensioned steel sheet to form a sphere 82 and a slab 84; Placing and curing the asphalt or concrete on the slab (84) to sequentially perform the step of pavement 90 to construct a ramen bridge (B).

Here, the fixing device 32 is welded to the pretensioning steel plate 30 so as to face each other on the end, and the fixing device 32 is a vertical plate 33 made of a square plate-like body having a predetermined thickness and width. And a side plate 35 which is integrally bent at a lower end of the vertical plate 33 at a right angle and welded to both ends of the vertical plate 33 and to both ends of the pretensioned steel plate 30. In the vertical plate 33, the steel wire insertion hole 36 is formed through the front and rear surfaces.

The shear connector 37 is fixedly installed on the upper and lower surfaces of the pretensioned steel sheet 30.

In addition, the steel member 50 is made of an upper, lower flange and the abdomen and is made of a "b" type steel.

That is, as a method of constructing a ramen bridge with prestressed concrete girder using pretensioned steel sheet according to the present invention, the connecting steel 20 is provided at the end of the prestressed concrete girder G using the pretensioned steel sheet. The method of connecting the prestressed concrete girder (G) using the pretensioned steel sheet which is a constant moment member and the rigid member 50 which is a parent moment member is applied.

Here, the ramen bridge (B) is the cross-sectional force of the span portion of the bridge is reduced and the cross-sectional force of the haunting portion that is the connection between the prestressed concrete girder (G) using the pre-tensioning steel plate and the wall portion 60 of the lower member is increased In order to cope with this problem, the constant moment part is applied to the prestressed concrete girder (G) using the steel plate for pretensioning in which the pretensioning steel plate 30 for stiffness promotion is installed, and the parent part part is the "a" type steel type. Applying the steel reinforced concrete member provided with the member 50 is constructed by connecting the two members in the haunting unit.

First, as shown in Figures 8a to 8i, when the prestressed concrete girder (G) using the pre-tensioned steel sheet according to the present invention, the parent to the end of the prestressed concrete girder (G) using the pre-tensioned steel sheet After the connection steel material 20 which is a member is installed and the prestressed concrete girder G using the pretensioned steel sheet is produced, the prestressed concrete girder G using the pretensioned steel sheet is transported to the site.

Subsequently, the "a" type rigid member 50, which is a parent member, is installed on the pre-installed wall part 60, and the prestressed concrete girder using a pretensioned steel plate between the "a" type rigid member 50 ( G) is inserted, and the connecting plate 70 is disposed on the connecting steel 20 and the rigid member 50 provided at the end of the prestressed concrete girder G using the pretensioned steel plate, and the high tension bolt 72 is disposed. Fasten to the ramen bridge (B).

Subsequently, a portion of the lower portion of the bridge is provided with copper bars, and the concrete is cast and cured on the prestressed concrete girder G and the rigid member 50 using the pretensioned steel sheet to form the spheres 82 and the slab 84. Then, asphalt 90 or concrete pavement 90 on the slab 84 to complete the bridge.

[Manufacturing Method of Prestressed Concrete Girder Continuous Ramen Bridge Using Pretensioned Steel Sheet]

9 is a front view illustrating a continuous ramen bridge provided with prestressed concrete girder using a pretensioned steel sheet according to the present invention.

As shown in this figure, the prestressed concrete girder bridge construction method using the pre-tensioned steel sheet according to the present invention, after inserting the connecting steel 20 in the formwork 26, the sheath tube 24 is disposed, Installing a pretensioning steel plate (30) having a fixing device (32) attached to a lower surface of a central portion of the mold (26), and fixing the pretensioning PS steel wire (40a) to the fixing device (32); Tensioning the pretension PS steel wire 40a; Placing and curing concrete in the formwork (26) to form a concrete girder (C); Cutting the PS steel wire 40a for pretensioning of the concrete girder C; After the post-tensioned PS steel wire 40b is inserted into the sheath tube 24, the pre-stressed concrete girder (G) using pre-tensioned steel sheet is introduced by introducing pre-stressing the post-tensioned PS steel wire 40b by post tensioning. Manufacturing); Manufacturing a rigid member (50, 52) consisting of upper and lower flanges and an abdomen and having a predetermined shape; Transporting the prestressed concrete girder (G) and the rigid members (50, 52) to the site using the pretensioned steel sheet; Constructing the wall portion 60 and the piers 62 on the ground; Installing rigid members (50, 52) on the wall (60) and the pier (62); A prestressed concrete girder G using a pretensioned steel sheet is inserted between the rigid members 50 and 52, and a connection between the prestressed concrete girder G using the pretensioned steel sheet 50 and 52 is performed. Attaching the connecting plate 70 to the steel 20 and fastening the high tension bolts 72; Installing a cross beam 80 between the prestressed concrete girders G using the pretensioned steel sheet; Placing and curing concrete on the prestressed concrete girder (G) using the rigid members (50, 52) and pretensioned steel sheet to form spheres (82) and slabs (84); Placing and curing the asphalt or concrete on the slab (84) by sequentially performing the step of pavement 90 to construct a continuous ramen bridge (B).

A fixing device 32 is welded to the pretensioned steel sheet 30 so as to face each other on an end thereof, and the fixing device 32 includes a vertical plate 33 made of a square plate-like body having a predetermined thickness and width. It is formed integrally by bending at a right angle at the lower end of the vertical plate 33, consisting of side plates 35 which are welded to both ends of the vertical plate 33 and both ends of the pretensioned steel sheet 30, the vertical plate A steel wire insertion hole 36 is formed through the front and rear surfaces 33, and the shear connector 37 is fixedly installed on the upper and lower surfaces of the pretensioned steel sheet 30.

The rigid members 50 and 52 are composed of a "a" type member 50 and a "T" type member 52, the "a" type member 50 is installed on the wall portion (60) The "T" type rigid member 52 is installed in the pier 62.

That is, the continuous ramen bridge construction method using the prestressed concrete girder using the pre-tensioned steel sheet according to the present invention, first, before installing the prestressed concrete girder (G) using the pre-tensioned steel sheet wall portion (60) ) "A" type rigid member 50 is installed on the bridge, "T" type rigid member 52 is installed on the pier 62, and "a" type rigid member 50 of the wall portion 60. And the connecting steel 20 of the prestressed concrete girder G using the pretensioned steel plate between the " T " steel member 52 of the pier 62 by the connecting plate 70 and the high tension bolt 72. It should be noted that it can also be constructed by the method of forming a continuous ramen bridge (B).

[Manufacturing Method of Prestressed Concrete Bridge Using Pretensioned Steel Sheet]

10 is a front view illustrating a prestressed concrete girder bridge using a pretensioned steel sheet according to the present invention.

As shown in these drawings, the prestressed concrete girder bridge construction method using the pre-tensioned steel sheet according to the present invention after inserting the connecting steel 20 in the formwork 26, the sheath pipe 24 is disposed, Installing a pretensioning steel plate (30) having a fixing device (32) attached to a lower surface of a central portion of the mold (26), and fixing the pretensioning PS steel wire (40a) to the fixing device (32); Tensioning the pretension PS steel wire 40a; Placing and curing concrete in the formwork (26) to form a concrete girder (C); Cutting the PS steel wire 40a for pretensioning of the concrete girder C; After the post-tensioned PS steel wire 40b is inserted into the sheath tube 24, the pre-stressed concrete girder (G) using pre-tensioned steel sheet is introduced by introducing pre-stressing the post-tensioned PS steel wire 40b by post tensioning. Manufacturing); Transporting the prestressed concrete girder G using the pretensioned steel sheet to the site; Constructing alternating 64 and piers 62 on the ground; Mounting a prestressed concrete girder (G) using a pretensioned steel sheet on the alternating (64) and pier (62); Fastening the connecting plate 70 and the high tension bolt 72 to the connecting steel 20 of the prestressed concrete girder G using the pretensioning steel sheet; Installing a cross beam 80 between the prestressed concrete girders G using the pretensioned steel sheet; Placing and curing concrete on the prestressed concrete girder (G) using the pretensioned steel sheet to form a slab (84); Placing and curing the asphalt or concrete on the slab (84) by sequentially performing the step of pavement 90 to construct a bridge.

That is, the prestressed concrete girder bridge construction method using the pre-tensioned steel sheet 30 according to the present invention first to produce a pre-stressed concrete girder (G) using the pre-tensioned steel sheet by the process as described above, this site After transporting to the bridge, and then mounted on the lower alternating 64 or pier 62 of the pre-installed bridge, the formwork 26 is installed, and the concrete on the prestressed concrete girder G using the pretensioned steel sheet And slab to form a slab (84), the asphalt or concrete is poured and cured on the slab (84) to construct a bridge (90) to construct a bridge (B).

12: upper flange 14: lower flange
16: abdomen 20: connecting steel
24: sheath tube 26: formwork
30: pretensioning steel plate 32: fixing device
33: vertical plate 35: side plate
36: steel wire insertion hole 37: shear connector
40a: PS steel wire for pretension 40b: PS steel wire for post tension
50: "A" type rigid member 52: "T" type rigid member
60: wall part 62: pier
64: shift 70: connecting plate
72: high tension bolt 80: cross beam
82: sphere 84: slab
90: packing
B: Ramen Bridge, Steel Bridge C: Concrete Girder
G: Prestressed Concrete Girder with Pretensioned Steel Sheet

Claims (28)

Inserting the connecting steel 20 consisting of the upper, lower flanges 12, 14 and the abdomen 16, the sheath tube 24 is disposed in the form 26, the fixing device on the lower surface of the central portion of the form 26 A pretensioned steel plate 30 having a 32 attached thereto, a PS steel wire 40a for pretension is disposed on the fixing device 32, and the PS steel wire 40a for tension is tensioned. Placing and curing concrete in the formwork 26 to form a concrete girder (C), cutting the pre-tension PS steel wire (40a), and inserts the post-tension PS steel wire (40b) in the sheath tube (24). And prestressed concrete girder using a pre-tensioned steel sheet prepared by introducing the pre-stressing by the post tension the PS steel wire (40b) for post-tension. The method of claim 1,
Prestressed concrete girder using the pre-tensioned steel sheet, characterized in that the fixing device 32 is welded to the pretensioned steel sheet 30 to face each other on the end. The method according to claim 1 or 2,
The fixing device 32 is integrally formed by bending at a right angle at a lower end of the vertical plate 33 and the vertical plate 33 having a rectangular plate-like body having a constant thickness and width, and both ends of the vertical plate 33 and Prestressed concrete girder using a pre-tensioned steel sheet, characterized in that the side plate 35 is welded over both ends of the pre-tensioning steel sheet (30). The method of claim 3,
Prestressed concrete girder using a pre-tensioned steel sheet, characterized in that the steel plate insertion hole 36 is formed through the front and rear surfaces in the vertical plate (33). The method according to claim 1 or 2,
Prestressed concrete girder using the pre-tensioned steel sheet, characterized in that the shear connector (37) is fixed to the upper and lower surfaces of the pre-tensioning steel sheet (30). In the prestressed concrete girder manufacturing method, manufacturing a connecting steel 20 consisting of the lower flanges (12, 14) and the abdomen (16);
Insert the connecting steel 20 into the formwork 26, arrange the sheath tube 24, and then install the pretensioned steel plate 30 having the fixing device 32 attached to the lower surface of the central part of the formwork 26. And disposing a pretensioned PS steel wire 40a in the fixing device 32;
Tensioning the pretension PS steel wire 40a;
Placing and curing concrete in the formwork (26) to form a concrete girder (C);
Cutting the PS steel wire 40a for pretensioning;
After the post-tensioned PS steel wire 40b is inserted into the sheath tube 24, the post-tensioned PS steel wire 40b is formed by introducing prestressing by post-tensioning. How to make prestressed concrete girder using The method according to claim 6,
The prestressed steel girder manufacturing method using the pre-tensioned steel sheet, characterized in that the fixing device 32 is welded on the end facing each other on the pretensioned steel sheet (30). The method of claim 7, wherein
The fixing device 32 is integrally formed by bending at a right angle at a lower end of the vertical plate 33 and the vertical plate 33 having a rectangular plate-like body having a constant thickness and width, and both ends of the vertical plate 33 and A prestressed concrete girder manufacturing method using a pretensioned steel sheet, characterized in that the side plate 35 is welded over both ends of the pretensioned steel sheet (30). 9. The method of claim 8,
Prestressed concrete girder manufacturing method using a pre-tensioned steel sheet characterized in that the vertical plate 33 is formed through the front and rear through the steel wire insertion hole (36). 8. The method according to claim 6 or 7,
Prestressed concrete girder manufacturing method using a pre-tensioned steel sheet, characterized in that the shear connector (37) is fixed to the upper and lower surfaces of the pre-tensioning steel sheet (30). Insert the connecting steel 20 into the formwork 26, arrange the sheath tube 24, and then install the pretensioned steel plate 30 having the fixing device 32 attached to the lower surface of the central part of the formwork 26. And fixing the pretension PS steel wire 40a to the fixing device 32;
Tensioning the pretension PS steel wire 40a;
Placing and curing concrete in the formwork (26) to form a concrete girder (C);
Cutting the PS steel wire 40a for pretensioning of the concrete girder C;
After the post-tensioned PS steel wire 40b is inserted into the sheath tube 24, the pre-stressed concrete girder (G) using pre-tensioned steel sheet is introduced by introducing pre-stressing the post-tensioned PS steel wire 40b by post tensioning. Manufacturing);
Manufacturing a rigid member 50 having an upper shape, a lower flange and an abdomen, and having a predetermined shape;
Transporting the prestressed concrete girder G and the rigid member 50 to the site using the pretensioned steel sheet;
Constructing the wall part 60 on the ground;
Installing a rigid member (50) on the wall (60);
Inserting the prestressed concrete girder (G) using the pre-tensioned steel sheet between the steel member 50, the connecting steel 20 of the prestressed concrete girder (G) using the steel member 50 and the pre-tensioned steel sheet Attaching the connecting plate 70 to the fastening bolt 72;
Installing a cross beam 80 between the prestressed concrete girders G using the pretensioned steel sheet;
Placing concrete and curing the prestressed concrete girder (G) using the rigid member 50 and the pretensioned steel sheet to form a sphere 82 and a slab 84;
Prestressed concrete girder bridge construction method using a pretensioned steel sheet characterized in that the step of placing and curing the asphalt or concrete on the slab (84) and pavement (90) in sequence to construct a ramen bridge. The method of claim 11,
The prestressed steel girder bridge construction method using the pre-tensioned steel sheet, characterized in that the fixing device 32 is welded to the pretensioned steel sheet 30 to face each other on the end. The method of claim 12,
The fixing device 32 is integrally formed by bending at a right angle at a lower end of the vertical plate 33 and the vertical plate 33 having a rectangular plate-like body having a constant thickness and width, and both ends of the vertical plate 33 and Prestressed concrete girder bridge construction method using the pre-tensioned steel sheet, characterized in that the side plate 35 is welded over both ends of the pre-tensioning steel sheet (30). The method of claim 13,
Prestressed concrete girder bridge construction method using a pre-tensioned steel sheet, characterized in that the steel plate insertion hole 36 is formed in the vertical plate 33 through the front and rear surfaces. 13. The method according to claim 11 or 12,
Prestressed concrete girder bridge construction method using the pre-tensioned steel sheet, characterized in that the shear connector (37) is fixed to the upper and lower surfaces of the pre-tensioning steel sheet (30). Insert the connecting steel 20 into the formwork 26, arrange the sheath tube 24, and then install the pretensioned steel plate 30 having the fixing device 32 attached to the lower surface of the central part of the formwork 26. And fixing the pretension PS steel wire 40a to the fixing device 32;
Tensioning the pretension PS steel wire 40a;
Placing and curing concrete in the formwork (26) to form a concrete girder (C);
Cutting the PS steel wire 40a for pretensioning of the concrete girder C;
After the post-tensioned PS steel wire 40b is inserted into the sheath tube 24, the pre-stressed concrete girder (G) using pre-tensioned steel sheet is introduced by introducing pre-stressing the post-tensioned PS steel wire 40b by post tensioning. Manufacturing);
Manufacturing a rigid member (50, 52) consisting of upper and lower flanges and an abdomen and having a predetermined shape;
Transporting the prestressed concrete girder (G) and the rigid members (50, 52) to the site using the pretensioned steel sheet;
Constructing the wall portion 60 and the piers 62 on the ground;
Installing rigid members (50, 52) on the wall (60) and the pier (62);
A prestressed concrete girder G using a pretensioned steel sheet is inserted between the rigid members 50 and 52, and a connection between the prestressed concrete girder G using the pretensioned steel sheet 50 and 52 is performed. Attaching the connecting plate 70 to the steel 20 and fastening the high tension bolts 72;
Installing a cross beam 80 between the prestressed concrete girders G using the pretensioned steel sheet;
Placing and curing concrete on the prestressed concrete girder (G) using the rigid members (50, 52) and pretensioned steel sheet to form spheres (82) and slabs (84);
Prestressed concrete girder bridge construction method using a pre-tensioned steel sheet characterized in that the step of placing and curing asphalt or concrete on the slab (84) and sequentially paving (90) to construct a continuous ramen bridge . 17. The method of claim 16,
The prestressed steel girder bridge construction method using the pre-tensioned steel sheet, characterized in that the fixing device 32 is welded to the pretensioned steel sheet 30 to face each other on the end. 18. The method of claim 17,
The fixing device 32 is integrally formed by bending at a right angle at a lower end of the vertical plate 33 and the vertical plate 33 having a rectangular plate-like body having a constant thickness and width, and both ends of the vertical plate 33 and Prestressed concrete girder bridge construction method using the pre-tensioned steel sheet, characterized in that the side plate 35 is welded over both ends of the pre-tensioning steel sheet (30). 19. The method of claim 18,
Prestressed concrete girder bridge construction method using a pre-tensioned steel sheet, characterized in that the steel plate insertion hole 36 is formed in the vertical plate 33 through the front and rear surfaces. 18. The method according to claim 16 or 17,
Prestressed concrete girder bridge construction method using the pre-tensioned steel sheet, characterized in that the shear connector (37) is fixed to the upper and lower surfaces of the pre-tensioning steel sheet (30). 17. The method of claim 16,
The steel member (50, 52) prestressed concrete girder bridge construction method using a pre-tensioned steel sheet, characterized in that consisting of a "b" type member 50 and a "T" type member (52). The method of claim 21,
Prestressed concrete girder bridge construction method using a pre-tensioned steel sheet, characterized in that the "b" -type steel member 50 is installed on the wall portion (60). The method of claim 21,
Prestressed concrete girder bridge construction method using a pre-tensioned steel sheet, characterized in that the "T" type rigid member 52 is installed on the pier (62). Insert the connecting steel 20 into the formwork 26, arrange the sheath tube 24, and then install the pretensioned steel plate 30 having the fixing device 32 attached to the lower surface of the central part of the formwork 26. And fixing the pretension PS steel wire 40a to the fixing device 32;
Tensioning the pretension PS steel wire 40a;
Placing and curing concrete in the formwork (26) to form a concrete girder (C);
Cutting the PS steel wire 40a for pretensioning of the concrete girder C;
After the post-tensioned PS steel wire 40b is inserted into the sheath tube 24, the pre-stressed concrete girder (G) using pre-tensioned steel sheet is introduced by introducing pre-stressing the post-tensioned PS steel wire 40b by post tensioning. Manufacturing);
Transporting the prestressed concrete girder G using the pretensioned steel sheet to the site;
Constructing alternating 64 and piers 62 on the ground;
Mounting a prestressed concrete girder (G) using a pretensioned steel sheet on the alternating (64) and pier (62);
Fastening the connecting plate 70 and the high tension bolt 72 to the connecting steel 20 of the prestressed concrete girder G using the pretensioning steel plate;
Installing a cross beam 80 between the prestressed concrete girders G using the pretensioned steel sheet;
Placing and curing concrete on the prestressed concrete girder (G) using the pretensioned steel sheet to form a slab (84);
Prestressed concrete girder bridge construction method using a pre-tensioned steel sheet characterized in that the steel bridge is constructed by sequentially performing the step of placing and curing the asphalt or concrete on the slab (84) paving (90). 25. The method of claim 24,
The prestressed steel girder bridge construction method using the pre-tensioned steel sheet, characterized in that the fixing device 32 is welded to the pretensioned steel sheet 30 to face each other on the end. 26. The method of claim 25,
The fixing device 32 is integrally formed by bending at a right angle at a lower end of the vertical plate 33 and the vertical plate 33 having a rectangular plate-like body having a constant thickness and width, and both ends of the vertical plate 33 and Prestressed concrete girder bridge construction method using the pre-tensioned steel sheet, characterized in that the side plate 35 is welded over both ends of the pre-tensioning steel sheet (30). The method of claim 26,
Prestressed concrete girder bridge construction method using a pre-tensioned steel sheet, characterized in that the steel plate insertion hole 36 is formed in the vertical plate 33 through the front and rear surfaces. The method of claim 24 or 25,
Prestressed concrete girder bridge construction method using the pre-tensioned steel sheet, characterized in that the shear connector (37) is fixed to the upper and lower surfaces of the pre-tensioning steel sheet (30).

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