KR100662814B1 - Prestressed Concrete Euger with Hollow Tube and Its Continuous Method - Google Patents

Abstract

The present invention is to increase the rigidity of the girder by embedding the hollow tube in the girder, and also to install the hollow tube tensioned by post-tensioning in the field, the hollow tube to be structurally continuous by installing a continuous anchorage The purpose is to provide a built-in prestressed concrete euger and its sequencing method.

Prestressed concrete girder with a hollow tube according to the present invention for achieving the above object is a girder consisting of a web and a flange; A hollow tube inserted into the web of the girder and formed into a predetermined cross-sectional shape; Characterized in that it is composed of a plurality of fixing fixtures are fixed so that a plurality of steel wires are fixed to the side of the web of the yuger.

In addition, the prestressed concrete girder sequencing method with a hollow tube according to the present invention for achieving the above object comprises the steps of assembling the reinforcing bars to form the girder; Installing a hollow tube on the inner side of the assembled reinforcing beam, connecting the host steel wire while installing the host anchorages at predetermined positions at both ends of the mold, and secondary tension and maintenance at a constant position from the host anchorage to the inside of the girder While installing the fixing anchorage, connecting the secondary tension and maintenance steel wire, connecting the continuous steel wire while installing the continuous anchorage on the web top of the girder, the continuity having a constant length at one end of the flange of the girder After installing the connecting steel, the step of curing the concrete to make a girder and to the first tension (II); Install the produced girder on the piers and shifts, and connect the continuum connecting steel installed in the flange with the continuum connecting cover steel plate and the high-strength bolt at the pier in the center to install the continuum connection. Step (III); Filling the continuous connection portion with concrete and contacting each other at the sides of the girder and the girder by injecting epoxy or filling non-condensed mortar to close the finish (IV); (V) forming a slab by introducing concrete to the upper part of the girder after introducing the tension force into the sequential steel wire connected to the sequential anchorage which is attached to the side of the girder and performing the sequential primary tension of the girder; (VI) applying a tension force to the secondary tension and maintenance steel wire connected to the secondary tension and maintenance anchor after the slab formation (VI); It is characterized in that the bridge is successively sequentially carried out by the step (Ⅶ) of applying the tensioning force to the continuous steel wire connected to the continuous anchorage to perform the continuous secondary tension.

Description

Prestressed concrete U-girder which the hollow pipe contained, and it's continuationized method of construction}

1 is a perspective view showing a prestressed concrete girder with a hollow tube according to the present invention 1,

Figure 2 is a perspective view 2 showing a prestressed concrete girder with a hollow tube according to the present invention,

Figure 3 is a front view showing a concrete circular fume pipe of the prestressed concrete girder with a hollow tube according to the present invention 1,

Figure 4 is a front view showing a concrete circular fume pipe of the prestressed concrete girder with a hollow tube according to the present invention 2,

Figure 5 is a front view showing a concrete rectangular fume pipe of the prestressed concrete euger embedded hollow tube according to the present invention,

Figure 6 is a front view showing a concrete rectangular fume pipe of the prestressed concrete girder with a hollow tube according to the present invention 2,

7 is an exemplary view showing a simple bridge form in which the prestressed concrete girder with a hollow tube built in according to the present invention is alternately installed;

8 is a cross-sectional view taken along the line A-A of FIG.

9 is a cross-sectional view taken along the line B-B of FIG.

10 is a side view showing a prestressed concrete girder continuous bridge with a hollow tube according to the present invention,

11 is a cross-sectional view taken along the line A-A of FIG.

12 is a cross-sectional view taken along the line B-B of FIG. 10.

Explanation of symbols on the main parts of the drawing

10: Euger 12: Web

14: flange 20: hollow tube

22: round hollow tube 24: square hollow tube

26: concave groove 28: shear connector

30: Host Settlement 32: Host Liner

40: secondary tension and maintenance anchorage 42: secondary tension and maintenance steel wire

50: serialization anchor 52: serialization liner

60: continuous connecting steel 70: continuous connecting cover steel

72: high tension bolt 80: continuous connection

100: shift 110: pier

The present invention relates to a prestressed concrete girder with a hollow tube and a continuous method thereof. In particular, the hollow tube is embedded in the girder to increase the rigidity of the girder, and is also tensioned by post-tensioning in the field. The present invention relates to a prestressed concrete girder with a hollow tube for structurally continuous installation of a maintenance fixture and a sequential anchorage, and a sequencing method thereof.

In general, prestressed concrete girder is applied to the bridge in the form of a simple bridge in which the prestressing is applied to the cross section of the PSC girder before synthesis, mounted on the pier, and the bottom plate and the PSC girder are composited with site-cast concrete. And structure to resist live load

Here, the construction of the prestressed concrete girder as described above has to be installed in a number of places expansion joint device, which has the disadvantage of reducing the running performance of the vehicle and the maintenance cost of the bridge.

In addition, it is disadvantageous in terms of economics because it is based on a simple bridge that is structurally disadvantageous in determining the specifications of the various member elements forming the bridge superstructure, that is, the shape and thickness of the girder, the placement interval, and the amount of prestressed steel. There is this.

Conventional composite prestressed concrete girder bridges constructed as described above are subjected to the entire prestressing to the cross section of the prestressed concrete girder before synthesis, and then mounted on the pier in the form of a simple bridge, It is a simple bridge composed of prestressed concrete girder and is constructed to resist additional dead and live loads acting on the bridge.

As such, the prestressed concrete girder bridge constructed as a simple bridge has to be installed in many places, and thus, the expansion joint device must be installed, thereby reducing the running performance of the vehicle and increasing the maintenance cost of the bridge.

In addition, in determining the specifications of the various member elements (the shape and thickness of the girder, the spacing of the girders, and the amount of prestressed steel) of the upper bridge structure in the continuous bridge, the continuous bridge should be constructed based on a simple bridge that is structurally disadvantageous. However, there is a disadvantage that excessive construction cost of the bridge occurs.

Accordingly, the present invention has been made to solve the problems described above, by embedding a hollow tube in the girder to increase the stiffness of the girder, and also to the secondary tension tension by post-tensioning in the field, It is an object of the present invention to provide a prestressed concrete euger with a hollow tube for structurally continuity by installing maintenance and sequencing anchorages and its sequencing method.

Prestressed concrete girder with a hollow tube according to the present invention for achieving the above object is a girder consisting of a web and a flange; A hollow tube inserted into the web of the girder and formed into a predetermined cross-sectional shape; Characterized in that it is composed of a plurality of fixing fixtures are fixed so that a plurality of steel wires are fixed to the side of the web of the yuger.

In addition, the prestressed concrete girder sequencing method with a hollow tube according to the present invention for achieving the above object comprises the steps of assembling the reinforcing bars to form the girder; Installing a hollow tube on the inner side of the assembled reinforcing beam, connecting the host steel wire while installing the host anchorages at predetermined positions at both ends of the mold, and secondary tension and maintenance at a constant position from the host anchorage to the inside of the girder While installing the fixing anchorage, connecting the secondary tension and maintenance steel wire, connecting the continuous steel wire while installing the continuous anchorage on the web top of the girder, the continuity having a constant length at one end of the flange of the girder After installing the connecting steel, the step of curing the concrete to make a girder and to the first tension (II); Install the produced girder on the piers and shifts, and connect the continuum connecting steel installed in the flange with the continuum connecting cover steel plate and the high-strength bolt at the pier in the center to install the continuum connection. Step (III); Filling the continuous connection portion with concrete and contacting each other at the sides of the girder and the girder by injecting epoxy or filling non-condensed mortar to close the finish (IV); (V) forming a slab by introducing concrete to the upper part of the girder after introducing the tension force into the sequential steel wire connected to the sequential anchorage which is attached to the side of the girder and performing the sequential primary tension of the girder; (VI) applying a tension force to the secondary tension and maintenance steel wire connected to the secondary tension and maintenance anchor after the slab formation (VI); It is characterized in that the bridge is successively performed by sequentially performing the step (력) of sequential secondary tension by introducing tension force into the continuity steel wire connected to the sequential anchorage.

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

1 is a perspective view 1 showing a prestressed concrete girder with a hollow tube according to the present invention, 2 is a perspective view 2 showing a prestressed concrete girder with a hollow tube according to the present invention, and FIG. 1 is a front view illustrating a concrete circular fume pipe of a prestressed concrete euger having a hollow tube according to the present invention,

Figure 4 is a front view showing a concrete circular fume tube of the prestressed concrete euger with a hollow tube according to the present invention 2, Figure 5 is a concrete rectangular fume tube of the prestressed concrete euger with a hollow tube according to the present invention 1 is a front view showing

6 is a front view illustrating a concrete rectangular fume tube of a prestressed concrete euger with a hollow tube according to the present invention, and FIG. 7 is a prestressed concrete euger with a hollow tube according to the present invention installed in an alternating manner. Illustrated diagram showing a simple bridge form,

FIG. 8 is a cross-sectional view taken along line AA of FIG. 7, FIG. 9 is a cross-sectional view taken along line BB of FIG. 7, and FIG. 10 is a side view illustrating a prestressed concrete girder continuous bridge having a hollow tube according to the present invention. It is sectional drawing along the AA line of FIG. 10, and FIG. 12 is sectional drawing along the BB line of FIG.

As shown in these figures, the prestressed concrete girder with a hollow tube according to the present invention comprises a girder 10 consisting of a web 12 and a flange 14; A hollow tube 20 inserted into the web 12 of the girder 10 and formed in a predetermined cross-sectional shape; A plurality of PC steel wires (32, 42, 52) is fixed to the side of the web 12 of the girder 10 is composed of a fixing unit 30 40, 50 fixedly installed.

Here, the hollow tube 20 is installed in a predetermined position on the inner surface from both ends of the girder 10, and is arranged in the inner central portion of 0.2L point from both ends of the girder 10.

In addition, the hollow tube 20 has a cross-sectional shape is composed of a circular or rectangular hollow tube (22, 24) or a rhombic hollow tube, the material is steel, resin, glass fiber, civil fiber, aramid fiber, composite fiber , Composite fiber resin, or concrete.

In particular, the circular or rectangular hollow tube (22, 24) has a structure in which a shear connector (28) is installed so that the concave groove (26) is formed inward on the surface thereof or protrudes from the inside.

In addition, the anchorage (30, 40) is fixed to the center of both ends of the girder 10, and the host anchorage (30) for the host wire (32) is fixed; It is fixedly installed at regular intervals from the host anchorage fixture 30 to the inside of the girder 10, and consists of a secondary tension and maintenance anchorage 40 to which the secondary tension and maintenance steel wire 42 is fixed. do.

In addition, the fixing unit 30, 40, 50 is installed at a predetermined position of the girder 10, is fixedly installed in the center of both ends of the girder 10, the host holder anchorage 30 is the host steel wire 32 is settled )Wow; A secondary tension and maintenance fixing unit 40 fixedly installed at regular intervals from the host anchorage unit 30 to the inside of the girder 10 and having the secondary tension and maintenance steel wires 42 fixed thereto; It is fixed to the upper end of the web 12 of the girder 10, and consists of a sequential fixing unit 50 is fixed to the sequential steel wire 52.

Here, the continuous connecting steel material 60 having a fixed length is fixedly installed at both ends of the upper flange 14 of the continuous fixing anchor 50.

It will be described with respect to the continuation of prestressed concrete girder with a hollow tube according to the present invention made of a configuration as described above.

Prestressed concrete girder sequencing method with a hollow tube built-in according to the present invention comprises the steps of assembling the reinforcing bars to form the girder (I);

The hollow tube 20 is installed on the inner side of the assembled reinforcing beam, and the host steel wire 22 is connected while installing the host anchorage fixture 20 at predetermined positions at both ends of the mold. The secondary tension and maintenance steel wire 42 is connected while installing the secondary tension and maintenance anchorage 40 at a predetermined position inside the web 10, and the web 12 of the girder 10 is connected. After connecting the continuous steel wire 52 while installing the continuous anchorage 50 at the upper end, and after installing the continuous connection steel 60 having a predetermined length at one end of the flange 12 of the girder 10, concrete Casting and curing to prepare the girder 10 and the first tensile step (II);

The produced girder 10 is installed on the pier 100 and the alternator 110, and the flange 12 is connected to the girder 10 and the girder 10 installed adjacently in the pier 100 in the center. Connecting the continuous connection steel material 60 installed in the continuous connection cover steel plate 70 and the high tension bolt 72 to install the continuous connection part 80 (III);

Filling the sequential connection portion 80 with concrete while contacting each other at the sides of the girder 10 and the girder 10 by injecting epoxy or filling non-condensed mortar to close the finish (IV);

After the tension is introduced to the continuity steel wire 52 connected to the sequential fixing unit 50 attached to the side of the girder 10 to perform the sequential primary tension of the girder 10, the concrete is placed on the top of the girder 10. Pouring (V) to form a slab;

After the slab formation (VI) by introducing a tension force to the secondary tension and maintenance steel wire 42 connected to the secondary tension and maintenance anchorage (40) (II);

By introducing a tension force to the continuity steel wire 52 connected to the sequencing anchorage 50, the step (Ⅶ) of sequential secondary tension is sequentially performed to continually bridge the bridge.

As described above, the prestressed concrete girder with a hollow tube according to the present invention and its sequencing method increase the rigidity of the girder by embedding the hollow tube in the girder, and also by tensioning post-tensioning in the field. By installing secondary tension, maintenance and sequencing anchorage, there is an effect that can construct a structurally continuous bridge.

Claims (21)

delete delete delete delete delete delete delete delete delete delete Assembling the reinforcing bars to form the girder 10 (I); The hollow tube 20 is installed on the inner side of the assembled reinforcing beam, and the host steel wire 22 is connected while installing the host anchorage fixture 20 at predetermined positions at both ends of the mold. The secondary tension and maintenance steel wire 42 is connected to the secondary tension and maintenance anchorage 40 at a predetermined position inside the web 10, and the web 12 of the girder 10 is connected. After connecting the continuous steel wire 52 while installing the continuous anchorage 50 at the upper end, and after installing the continuous connection steel 60 having a predetermined length at one end of the flange 12 of the girder 10, concrete Casting and curing to prepare the girder 10 and the first tensile step (II); The produced girder 10 is installed on the pier 100 and the alternator 110, and the flange 12 is connected to the girder 10 and the girder 10 installed adjacently in the pier 100 in the center. Connecting the continuous connection steel material 60 installed in the continuous connection cover steel plate 70 and the high tension bolt 72 to install the continuous connection part 80 (III); Filling the sequential connection portion 80 with concrete while contacting each other at the sides of the girder 10 and the girder 10 by injecting epoxy or filling non-condensed mortar to close the finish (IV); After the tension is introduced to the continuity steel wire 52 connected to the sequential fixing unit 50 attached to the side of the girder 10 to perform the sequential primary tension of the girder 10, the concrete is placed on the top of the girder 10. Pouring (V) to form a slab; After the slab formation (VI) by introducing a tension force to the secondary tension and maintenance steel wire 42 connected to the secondary tension and maintenance anchorage (40) (II); By introducing a tension force to the sequential steel wire 52 connected to the sequential anchorage 50, the step (연속) of sequential secondary tension is sequentially performed to continually continually pre-stress the prestressed concrete girder with the hollow tube 20 embedded therein. A continuous process of prestressed concrete girder with a hollow tube. The method of claim 11, The prestressed concrete girder 10 having the hollow tube 20 embedded therein includes a girder 10 formed of a web 12 and a flange 14; A hollow tube 20 inserted into the web 12 of the girder 10 and formed in a predetermined cross-sectional shape; Hollow tube, characterized in that made of a plurality of fixing fixtures (30 40, 50) is fixed so that a plurality of PC steel wires (32, 42, 52) is fixed to the side of the web 12 of the girder (10) Built-in prestressed concrete girder sequencing method. The method of claim 12, The hollow tube 20 is a prestressed concrete girder sequencing method with a hollow tube, characterized in that installed on a predetermined position on the inner surface from both ends of the girder (10). The method according to claim 12 or 13, The hollow tube 20 is a prestressed concrete girder sequencing method with a hollow tube, characterized in that disposed in the inner central portion of the 0.2 l (length) point from both ends of the girder (10). The method of claim 12, The hollow tube 20 is a prestressed concrete girder sequencing method with a hollow tube, characterized in that the cross-sectional shape is made of a circular or rectangular hollow tube (22, 24) or a rhombus hollow tube. The method according to claim 12 or 14, The hollow tube 20 is a pre-stressed concrete girder continuation of the hollow tube, characterized in that the material is made of any one of steel, resin, glass fiber, civil fiber, aramid fiber, composite fiber, composite fiber resin, concrete Method. The method of claim 15, The circular or rectangular hollow tube (22, 24) is a pre-stressed concrete girder sequencing method with a hollow tube, characterized in that to form a concave groove (26) on the inside. The method according to claim 15 or 17, The circular or rectangular hollow tube (22, 24) is a pre-stressed concrete girder sequencing method with a hollow tube, characterized in that the shear connection member 28 is installed so as to protrude from the inside to the outside. The method of claim 12, The anchorages 30 and 40 are fixedly installed at the center of both ends of the girder 10, and the hostage anchorage 30 to which the host wires 32 are fixed; It is fixedly installed at regular intervals inside the girder 10 from the host anchorage 30, the secondary tension and maintenance steel wire 42 is made of a secondary tension and maintenance anchorage 40 is made up Prestressed concrete girder continuous method with a hollow tube. The method of claim 12, The anchorages 30, 40, and 50 are installed at a predetermined position of the girder 10, are fixedly installed at the center of both ends of the girder 10, and the hostage anchorage 30 to which the host steel wire 32 is settled. ; A secondary tension and maintenance fixing unit 40 fixedly installed at regular intervals from the host anchorage unit 30 to the inside of the girder 10 and having the secondary tension and maintenance steel wires 42 fixed thereto; It is fixed to the top of the web (12) of the girder (10), the continuum steel wire 52 is a prestressed concrete girder sequencing method with a hollow tube, characterized in that made of a continuous fixing fixture (50). The method of claim 20, Prestressed concrete girder sequencing method with a hollow tube, characterized in that fixed to the continuous connection steel material 60 having a fixed length at both ends of the upper flange (14) of the continuity anchorage (50).

Images