KR102486675B1 - Precast concrete slab construction method and bridge fabricated by usinr the same - Google Patents

Abstract

The present invention relates to a PC slab construction method and a bridge manufactured using the same. According to the present invention, the PC slab can be assembled and installed more stably and quickly on an upper surface of a bridge girder mounted on a bridge substructure, and height adjustment and lateral gradient of the PC slab can be more efficiently adjusted. The PC slab construction method of the present invention includes the steps of mounting both adjacently installed PC slabs on a bridge girder; and installing longitudinal bottom plate fasteners set so that upper and lower through-holes communicate with each other.

Description

PC slab construction method and bridge made using it {PRECAST CONCRETE SLAB CONSTRUCTION METHOD AND BRIDGE FABRICATED BY USINR THE SAME}

The present invention relates to a PC slab construction method. A PC slab construction method that can more stably and quickly assemble and install a PC slab on the upper surface of a bridge girder mounted on a bridge substructure, as well as more efficiently adjust the height and lateral gradient of the PC slab, and manufacturing using the same It's about bridges.

Figure 1a shows an exemplary assembly of a conventional steel bridge.

That is, it can be seen that both the girder 21 and the bottom plate 22 of the steel bridge are made of steel,

Therefore, looking at the longitudinal connection of the steel girder 21, it can be seen that they are fastened to each other using the connecting bolt 25 and the padding plate 24, and the steel bottom plate 22 is also connected to the connecting bolt 25 It can be seen that the flanges are fastened to each other.

Accordingly, the connection bolt 25 and the backing plate 24 made of steel are effective in connecting the girder 21 and the bottom plate 22 made of steel to each other, but securing fastening force to use as it is in the precast concrete floor plate And there is a limit that securing constructability is not easy.

Figure 1b shows an exemplary horizontal connection of a conventional precast concrete floor plate (10).

The precast concrete deck 11, other than the steel girder 21 or the steel deck 22, does not normally use fasteners such as connecting bolts and padding,

The U-shaped horizontal connector 16 is accommodated in the one-side receiving groove 15 formed on the connection surface of the precast concrete floor plate 11 on one side,

In the process of being moved and inserted into the other connection groove 15 of the other precast concrete floor plate 11 using a wire

While the U-shaped horizontal connector 16 passes between the connecting surfaces D of the precast concrete floor plate and fills and integrates one side connecting groove 15 and the other connecting groove 15 with a filler, the connecting surface D It can be seen that ) is connected using a mechanical connecting means 14 by a shear key and a dedicated groove.

However, since the U-shaped horizontal connector 16 is installed as a rod member installed to the extent of spanning the connection surface D of the adjacent precast concrete floor plate, the longitudinal connection performance of the precast concrete floor plate is improved even when a filler is used. There is a limit that is not expected to be high, and there is a problem with somewhat poor workability and workability.

Figure 1c shows an example of the upper and lower connection between the conventional precast concrete girder 31 and the precast concrete floor plate 32.

That is, after placing the precast concrete girder 31 on a bridge substructure such as a pier or abutment, the precast concrete floor plate 32 is installed so as to be placed on the upper surface of the precast concrete girder, and the precast concrete girder ( In order to bind 31) and the precast concrete floor plate 32 to each other,

The shear housing 33 and the lower shear connector 34 are set in advance on the upper surface of the precast concrete girder 31, and the shear housing 33 is separately dismantled in the shear pocket 35 of the precast concrete floor plate 32. After the shear groove 36 is exposed,

The upper shear connector 37 is additionally installed by the lower shear connector 34 formed in the shear groove 36 and the fastening nut,

It can be seen that the shear groove 36 and the shear pocket 35 are closed with the filler 38 so that the precast concrete floor plate 32 on the upper surface of the precast concrete girder 31 is rigidly connected to each other.

However, the work of installing and disassembling the shear housing 33 inevitably has a problem of poor workability.

1D shows a construction example of connecting a conventional bridge girder 42 and a floor plate 42 with a hinge connection structure.

That is, the lower block 44 having the concave groove 43 formed on the upper surface of the bridge girder 41 is set, and the upper block 46 having the convex part 45 formed in contact with the concave groove 43 is moved up and down. It can be seen that the bridge girder 41 and the floor plate 42 are hinged up and down to each other in such a way that rotation is not constrained by contacting each other.

This has the advantage of preventing the bending moment transmitted to the floor plate 42 from being transmitted to the bridge girder 41, but the lower block 44 and the upper block 46. Hinge connection structures such as the need to be installed separately It can be seen that the use is bound to be limited.

Republic of Korea Patent Publication No. 10-2008-0093261 (Title of Invention: Method for constructing a steel composite bridge capable of ultra-simple construction, Publication date: October 21, 2008) Korean Patent No. 10-2073169 (Title of Invention: Precast Slab Construction Method for Paving Using U-Shaped Dowel Bar, Publication Date: February 4, 2020) Republic of Korea Patent No. 10-2144400 (title of invention: PSC girder for precast slab and bridge construction method using the same, publication date: August 13, 2020) Korean Patent No. 10-0538832 (Title of Invention: Installation Structure of Precast Floor Plate and Girder Using Railing System, Publication Date: May 27, 2005)

Therefore, the present invention can stably assemble and construct PC slabs in the field with fastening bolts and longitudinal floor plate fasteners such as backing plates, and simply connects bridge girders and PC slabs with shear connectors using shear pockets. It is a technical task to solve the PC slab construction method that can be rigidly constructed, enabling rapid bridge construction, and the provision of a bridge manufactured using the PC slab construction method.

In addition, the present invention is a technical problem to solve the PC slab construction method that can stably set the lateral gradient while simply adjusting the height of the PC slab and the provision of a bridge manufactured using the same.

In order to achieve the above object, the PC slab construction method of the present invention,

(a) An upper receiving groove is formed on the upper surface around the connecting end face (B) of the body, and an intermediate insertion groove is formed in the middle of the connecting end face (B), so that the upper receiving groove and the intermediate portion are formed on the connecting end face (B). Mounting both PC slabs installed adjacent to each other on a bridge girder so that the insertion grooves are in horizontal contact with each other and communicate; And (b) installing a longitudinal bottom plate fastener set so that the upper and lower through-holes are in communication with each other by inserting the upper and middle backing plates into the upper receiving groove and the middle insertion groove of the two PC slabs; including , The upper and middle pads are installed while connecting the PC slabs in the longitudinal direction by fastening fastening bolts through through-holes communicating up and down at the connection end surface (B) of the PC slabs adjacent to each other, the In the state where the intermediate padding plate 132 in step (b) is inserted into the intermediate insertion groove 124 of the PC slab 120 on one side, it is moved toward the intermediate insertion groove 124 of the PC slab 120 on the other side to be connected. By setting the approximate middle portion of the middle pad 132 to pass through the connection end surface B, the middle pad 132 is completely inserted into the middle insertion groove 124 of the PC slab 120 on one side The other side PC slab 120 is prevented from being an obstacle in the process of adjoining the one side PC slab 120.

In addition, in order to achieve the above object, the PC slab construction method of the present invention,

(a) mounting a bridge girder on the constructed bridge substructure, but forming a housing, which is a shear connection device (A), to be exposed on the upper surface of the upper flange of the bridge girder; (b) It is installed so that the housing exposed on the upper surface of the mounted bridge girder and the shear pocket of the PC slab communicate with each other, and an upper receiving groove is formed on the upper surface around the connection end surface (B) of the body, and the connection end surface (B) an intermediate insertion groove is formed in the middle of the connection end surface (B), the upper receiving groove and the intermediate insertion groove are in contact with each other horizontally and initially setting the adjacent PC slab to communicate; (c) adjusting the height and lateral gradient of the PC slab mounted so that the shear pocket and the housing communicate with each other using a floor plate height adjusting device and saddles for lateral gradient; (d) connecting the PC slabs in the longitudinal direction using longitudinal floor fasteners; And (e) fixing the shear connector to the housing through the shear pocket, and filling the shear pocket with a filler containing non-shrinkable mortar to stiffen the bridge girder and the PC slab to each other; ) step, the upper and middle pads are inserted into the upper receiving groove and the middle insertion groove of the PC slabs, and the through-holes are set so that the upper and lower through-holes are in communication, so that the upper and middle pads are adjacent to each other. The PC slab is installed while connecting the PC slab in the longitudinal direction by fastening the fastening bolt through the through-hole communicating up and down on the connection end surface (B) of the PC slab, and the intermediate pad is installed in the middle insertion groove of the PC slab on one side In the state of being inserted, it is moved toward the middle insertion groove of the PC slab on the other side to be connected, and the approximate middle portion of the intermediate pad is set to pass through the connection end surface (B), so that the intermediate pad is inserted into the middle insertion groove of the PC slab on one side. It is completely inserted so that the other side PC slab does not become an obstacle in the process of adjoining one side PC slab.

According to the present invention, the bridge girder and the PC slab can be simply rigidized with the shear pocket and the shear connecting device (A) in the upper, lower and longitudinal directions, and the PC slab is attached with fastening bolts in the axial direction (longitudinal direction) It is possible to provide a PC slab construction method that can be stably and quickly connected with a longitudinal floor plate fastener such as a plate and a bridge manufactured using the same.

In addition, according to the present invention, since the height adjustment and the lateral gradient of the PC slab can be simply set using the floor plate height adjusting device and the floor plate saddle, PC capable of constructing bridges with PC slabs more quickly and economically It is possible to provide a slab construction method and a bridge manufactured using the slab construction method.

Figure 1a is an assembly example of a conventional steel bridge
Figure 1b is an example of horizontal connection of a conventional PC slab
Figure 1c is an example of upper and lower connection between a conventional precast concrete girder and a precast floor plate
1d is a construction example of connecting a conventional bridge girder and a floor plate with a hinge connection structure
2 is an exemplary view of a bridge manufactured using the PC slab construction method of the present invention;
3a is a construction example of a PC slab and a girder for a bridge of the present invention;
3b and 3c are construction examples of the PC slab of the present invention;
Figure 3d is an example of height adjustment construction of the PC slab of the present invention,
Figure 3e is an example of the transverse gradient construction of the PC slab of the present invention,
Figure 4 shows a flow chart of the PC slab construction method of the present invention.

Hereinafter, embodiments of the present invention will be described in detail so that those skilled in the art can easily practice with reference to the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a certain component is said to "include", it means that it may further include other components without excluding other components unless otherwise stated.

[Bridge 100 manufactured using the PC slab construction method of the present invention]

Figure 2 is an exemplary view of a bridge (100, which can be simply referred to as the bridge of the present invention hereinafter) manufactured using the PC slab construction method of the present invention, Figure 3a is a PC slab 120 and a bridge of the present invention 3b and 3c are examples of construction of the PC slab 120 of the present invention, FIG. 3d is an example of height adjustment of the PC slab 120 of the present invention, and FIG. It shows an example of the transverse gradient construction of the PC slab 120 of the present invention.

First, referring to FIG. 2, in the bridge 100 of the present invention, a plurality of bridge girders 110 are spaced apart in the transverse direction on a bridge substructure 200 such as piers and abutments, and the bridge girder 110 ) PC slab (120, precast concrete slab) with height adjustment and lateral gradient set on the upper surface is assembled and connected in the longitudinal direction.

Even if the PC slab 120 pre-manufactured in a factory is used as it is, the longitudinal bottom plate fasteners 130 such as fastening bolts and backing plates can be sufficiently secured for connection performance and workability,

The height adjustment of the PC slab 120 is made by the floor plate height adjusting device 140, and the lateral gradient adjustment is made simple by using the saddle 150 for horizontal gradient so that the operator can work .

Therefore, the bridge 100 manufactured using the PC slab construction method of the present invention is a bridge girder 110 equipped with a shear connection device (A) installed on the bridge lower structure 200 as shown in FIG. 2, PC slab (120), a longitudinal bottom plate fastener 130, a bottom plate height adjusting device 140, and a saddle 150 for lateral gradient.

First, as shown in FIG. 2, the bridge substructure 200 is constructed at a constant height as piers and alternately constructed at the site, and a plurality of bridge girders 110 are spaced apart in the transverse direction on the upper surface,

After mounting in the longitudinal direction (bridge axis direction), the height and lateral gradient of the PC slab 120 on the upper surface of the bridge girder 110 are adjusted using the floor plate height adjusting device 140 and the saddle 150 for lateral gradient It is set up, assembled, and connected in the longitudinal direction.

Next, as shown in FIG. 2, the bridge girder 110 equipped with the shear connecting device (A) is spaced apart in the transverse direction on the upper surface of the bridge lower structure 200, but is mounted in the longitudinal direction, and the present invention PSC Let's look at the girder as a standard.

The bridge girder 110 is pre-manufactured in a factory or the like. It is usually a reinforced concrete girder formed of an upper flange 111, an abdomen and a lower flange in an I-shaped cross section, and prestress is introduced using PC steel strands. It is used.

The bridge girder 110 is constructed so that it behaves integrally by being rigidized while the PC slab 120 is placed on the upper surface. For this rigidity, as shown in FIG. do.

This shear connection device (A) is for rigidity up and down using the shear pocket 121 of the bridge girder 110 and the PC slab 120.

Accordingly, the shear connecting device (A) includes a housing 112, a stud 113, and a shear connecting member 114 based on FIGS. 2 and 3A.

First, as shown in FIG. 3A, the housing 112 uses a steel member embedded so that the upper portion is exposed on the upper surface of the upper flange 111 of the bridge girder 110, and extends in the extension direction (longitudinal direction) of the upper flange 111. formed successively.

In this way, when the housing 112 is formed continuously in the longitudinal direction, even if a construction error occurs, the shear connector 114 can be easily installed in the housing 112 through the shear pocket 121 of the PC slab 120. There is an advantage to being there.

When the bridge girder 110 is manufactured in advance, the housing 112 is set so that it is embedded in the upper flange, and the inside is exposed, and the shear connector 114 passes through the inner space of the housing 112 to the shear pocket 121 ) through insert tightening?? will make it possible

When such a housing 112 is used, there is an advantage that the section steel member can be used as it is,

Since the shear connector 114 exposed to the upper part of the bridge girder 110 is not installed in advance, space-time interference does not occur,

When moving the PC slab 120 using a bogie, it can also act as a rail, making it very efficient.

Next, as shown in FIG. 3A, the stud 113 extends downward from the bottom surface of the housing 112 so that the housing 112 is fixed to the upper flange 111 of the bridge girder 110. It serves to be installed .

Next, as shown in FIG. 3A, the shear connector 114 is fixed to the bottom of the housing 112 by welding or the like through the shear pocket 121 formed in the PC slab 120, but extends into the shear pocket 121. installed as much as possible.

Accordingly, with the shear connector 114 installed in the shear pocket 121 and the housing 112, the shear pocket 121 is filled with a filler 148 such as non-shrinkage mortar to form the bridge girder 110 and the PC slab 120. ) can be forced up and down each other.

Next, the PC slab 120 is a bridge floor plate constructed by assembling and connecting the upper surface of the bridge girder 110 in the longitudinal direction (bridge axis direction) as shown in FIGS. 2 and 3B.

This PC slab 120 is manufactured in advance in a factory, etc., and is used in the form of a horizontal plate having a constant thickness and cross-sectional area for transportation and lifting to the site.

Referring to FIG. 3B, it can be seen that the PC slab 120 is connected in the longitudinal direction to the upper surface of the four bridge girders 110 in the transverse direction, but the size and number of installations are otherwise limited there is no

In this PC slab 120, a number of shear pockets 121 are formed to penetrate the upper and lower surfaces of the rectangular horizontal plate-shaped body 122 for rigidity with the bridge girder 110, and for longitudinal connection It is to be connected in the longitudinal direction by the longitudinal bottom plate fastener 130 at the connection end surface (B).

3B, since the housing 112 constituting the shear connecting device A of the bridge girder 110 is exposed by the shear pocket 121, the shear connector 114 is replaced with the shear pocket 121. ) through which it can be fixed to the housing 112.

In addition, referring to FIG. 3B, the upper portion is accommodated on the upper surface around the connection end surface (B) of the body portion 122 so that the longitudinal bottom plate fastener 130 can be installed on the connection end surface (B) for longitudinal connection. The groove 123 is formed in the form of a square groove,

It can be seen that the upper receiving groove 123 is formed to face the same on the upper surface of the adjacent PC slab 120 so that the upper receiving groove 123 is in horizontal communication with each other, and the outline of the connection end surface (B) It can be seen that the intermediate insertion groove 124 is formed in the middle.

Accordingly, as shown in FIG. 3B, the upper padding plate 131 of the longitudinal bottom plate fastener 130 is inserted into the upper receiving groove 123 communicating with each other, and

The intermediate padding plate 132 of the longitudinal bottom plate fastener 130 is inserted into the intermediate insertion groove 124,

The upper padding plate 131 and the middle padding board 132 are connected by a fastening bolt 133 through through-holes 131a and 132a communicating vertically at the connection end surface B of the PC slab 120 adjacent to each other. By fastening, it is possible to connect the PC slab 120 in the bridge girder 110 in the longitudinal direction.

That is, when using the PC slab 120 in the longitudinal direction floor plate fastener 130, it is possible to simply connect and sequentially connect in the longitudinal direction, which is not shown, but is equally applicable in the transverse direction.

Next, the longitudinal floor plate fastener 130 is a fastener for longitudinally connecting the bridge girder 110 and the PC slab 120 as shown in FIGS. 3B and 3C.

The longitudinal bottom plate fastener 130 includes an upper padding plate 131, a middle padding plate 132, and a fastening bolt 133, as shown in FIGS. 3B and 3C.

First, referring to FIGS. 3B and 3C , the upper backing plate 131 has a rectangular plate shape and has a plurality of through holes 131a through which fastening bolts 133 can pass through.

To this end, the upper pad 131 is inserted and installed to fit into the upper receiving groove 123 of the PC slab 120 connected to the adjacent PC slab 120, so that the position can be adjusted.

By fastening through and fastening the fastening bolt 133 to the upper back plate 131, both PC slabs 120 are assembled and connected.

Referring to FIG. 3B, the middle pad 132 is in the middle of the connection end surface (B) of the two PC slabs 120 because the assembly connection performance may be partially deteriorated when only the upper pad 131 is used. It is inserted into the intermediate insertion groove 124, and the fastening bolt 133 fastened through the upper back plate 131 is also penetrated so that the assembly connection performance can be additionally secured.

Accordingly, a plurality of through-holes 132a are formed in the form of a square plate so that the fastening bolt 133 can pass therethrough. It is set to be in communication with the upper and lower parts.

Accordingly, the upper padding board 131 and the middle padding board 132 of the present invention are manufactured in the same size, so that they are easy to manufacture and can be easily installed and dismantled.

At this time, the upper padding plate 131 can be installed by inserting it into the upper receiving groove 123 communicating horizontally on the upper surface of the PC slab 120,

In the state where the intermediate padding plate 132 is inserted into the intermediate insertion groove 124 of the PC slab 120 on one side, it is moved toward the intermediate insertion groove 124 of the PC slab 120 on the other side to be connected to the intermediate padding plate 132 ) is set to pass through the connection end surface (B).

3c is a method of moving the intermediate pad 132 toward the intermediate insertion groove 124 of the PC slab 120 on the other side to be connected in a state where it is inserted into the intermediate insertion groove 124 of the PC slab 120 on one side is showing

In this method, the moving tool 134 is connected to the intermediate padding plate 132 inserted into the intermediate insertion groove 124 of the PC slab 120 on one side, and the moving tool 134 is moved by the operator from the upper surface of the PC slab 120. It can be said to be a method in which the intermediate padding plate 132 is moved and inserted toward the intermediate insertion groove 124 of the other side PC slab 120 by pulling.

Accordingly, according to FIG. 3C, it can be seen that the upper receiving groove 123 and the intermediate insertion groove 124 are formed in upper and lower communication with each other in the PC slabs 120 on one side and the other side horizontally adjacent to each other, respectively,

Around the connection end surface (B), cross-section loss occurs due to the upper receiving groove 123 and the intermediate insertion groove 124, so the horizontal U-shaped reinforcing bar 135 is the upper receiving groove 123 and the intermediate insertion groove 124 It can be seen that there is a distribution in between.

At this time, an insertion hole 136 is formed in the semicircular bent portion of the horizontal U-shaped reinforcing bar 135, and the horizontal U-shaped reinforcing bar 135 is inserted into the insertion bolt by an insertion bolt (not shown) inserted into the insertion hole 136. As a result, it can be seen that the semicircular bent portion is supported and fixed.

These insertion bolts are also used for temporarily fixing the intermediate padding plate 132 to the intermediate insertion groove 124 of the PC slab 120 on one side.

Accordingly, the intermediate pad 132 is completely inserted into the intermediate insertion groove 124 of the PC slab 120 on one side, so that the PC slab 120 on the other side is not a disturbing factor in the process of adjoining the PC slab 120 on one side. make sure not to

Accordingly, the intermediate padding plate 132 in a state completely inserted into the intermediate insertion groove 124 of the PC slab 120 on one side is pulled from the upper surface of the PC slab 120 by the operator using the moving tool 134 to remove the PC slab 120 on the other side. ) The middle padding plate 132 is moved and inserted toward the middle insertion groove 124 of the

Understanding this, referring to FIG. 3C, the intermediate pad 132 has a plurality of through holes 132a formed in the form of a horizontal plate, so that the fastening bolts 133 are inserted into the through holes 132a to be fastened, fastening When the bolt 133 is inserted, it is preferable to form the through hole 132a in an elliptical slot shape in consideration of manufacturing and construction errors.

In addition, in order to install the moving tool 134 for horizontal movement of the intermediate pad 132, a fixing hole is formed on the side of one side end, and one side of the L-shaped rod member is fixed to the fixing hole to obtain a L-shaped rod Using the handle formed on the other side of the member,

It is possible to horizontally move the intermediate padding plate 132 in a state completely inserted into the intermediate insertion groove 124 of the PC slab 120 on one side.

That is, when the handle is pulled out toward the upper surface of the PC slab 120, the middle pad 132 moves horizontally and is inserted into the middle insertion groove 124 of the other PC slab 120. .

Referring to FIG. 3C for smooth horizontal movement of the intermediate pad 132, both side ends of the intermediate pad 132 are cut at the portion in contact with the intermediate insertion groove 124 so that a tapering portion is formed to form a jamming phenomenon to prevent this from happening.

As such, referring to FIG. 3C, after the intermediate padding plate 132 passes through the connecting end surface (B) in the intermediate insertion groove 124 of one side and the other PC slab 120 adjacent to each other, the upper padding board 131 By inserting into the upper receiving groove 123, the connection end surface (B) of one side and the other side PC slab 120 adjacent to each other is set so that the upper padding plate 131 passes through.

Accordingly, fastening bolts 133 are fastened to pass through the through-holes 131a formed in the upper padding plate 131 and the through-holes 132a formed in the middle padding plate 132.

The lower end of the fastening bolt 133 is fastened to the inside of the through hole 132a formed in the middle pad 132 so that the bolt head is tightened while in contact with the upper surface of the upper pad 131 to ensure sufficient connection performance be able to

Accordingly, according to FIG. 3C, the filler 148 containing non-shrinkage mortar fills the upper receiving groove 123, the insertion hole 136, the middle insertion groove 124, and the connection end surface B. As can be seen, a sealing material may be further installed in the lower portion of the connection end surfaces B of the PC slabs 120 on one side and the other side adjacent to each other so that the filler does not leak.

It is preferable to additionally form a filling hole communicating with the intermediate insertion groove 124 on the upper surface of the PC slab 120 so that the filling of the filler 148 can be press-fitted from the upper surface of the PC slab 120.

Referring to FIG. 3B , the fastening bolts 133 penetrate through holes 131a and 132a formed in the upper and middle backing plates 131 and 132 vertically and downward to penetrate the inside of the middle backing plate 132. is concluded

By using these fastening bolts 133, more rapid longitudinal connection of the PC slab 120 is possible.

Next, the floor plate height adjusting device 140 is for adjusting the installation height of the PC slab 120 installed on the upper surface of the bridge girder 110 after lifting, as shown in FIGS. 2 and 3D.

This is necessary because the PC slab 120 must be manufactured in advance and lifted to the upper surface of the bridge girder 110 to adjust the longitudinal connection and lateral gradient after setting.

That is, it can be said that it is necessary to prevent a step difference from being formed on the upper surface of the plurality of PC slabs 120.

Referring to FIG. 3D, the floor plate height adjusting device 140 is installed in the form of a separable landfill nut.

Referring to FIG. 3D as such a separable buried nut method, two are exemplified (TYPE 1 and TYPE 2), and when the PC slab 120 is manufactured, it is installed in advance to be buried, and the lower buried nut 142 is adopted It can be said that the height adjustment bolt 147 can be removed.

Accordingly, the first separable buried nut (TYPE 1) is formed such that the upper buried nut 141 and the lower buried nut 142, which are vertically cylindrical embedded nuts, communicate with each other and can be separated vertically, as shown in FIG. 3D.

The upper buried nut 141 is a vertical cylindrical member with a threaded portion formed on the inner surface and a horizontal plate-shaped lifting load resistance flange 144 integrally formed at the lower end,

The lower buried nut 142 is a vertical cylindrical member detachably connected to the lower part of the upper buried nut 141, and a lower buried flange 145 is formed at the lower part. It is initially set to be exposed to

Accordingly, the PC slab 120 in which the upper buried nut 141 and the lower buried nut 142 are embedded is initially set on the upper surface of the bridge girder 110 using a spacer and a lifting bolt,

The lifting load resistance flange 144 of the upper buried nut 141 and the lower buried flange 145 of the lower buried nut 142 resist the lifting load as a support plate.

Therefore, as shown in FIG. 3D, after the PC slab 120 is mounted on the bridge girder 110, the impact rod 146 is inserted into the upper landfill nut 141, and the lower end of the impact rod 146 is embedded in the lower part. When the upper end of the striking rod 146 is hit in a state in contact with the inner upper surface of the lower buried flange 145 through the nut 142,

As the lower buried flange 145 of the lower buried nut 142 is separated from the upper buried nut 141, it comes into contact with the upper surface of the bridge girder 110.

At this time, the lower buried flange 145 is set to be exposed on the bottom surface of the PC slab 120 so that it can be separated from the upper buried nut 141 by hitting, and the upper end of the lower buried nut 142 is the PC slab 120 As it is located inside, it may not escape when hitting.

Accordingly, the striking rod 146 is removed, and the height adjustment bolt 147 is fastened to the upper embedded nut 141 and the lower embedded nut 142 so that the installation height of the PC slab 120 is adjusted according to rotation, Although not shown, the bedding layer, which is the space between the bridge girder 110 and the PC slab 120, may be pre-filled with a filler.

Accordingly, after removing the height adjustment bolt 147, the filling material 148 containing non-shrinkage mortar is filled into the upper landfill nut 141 and the lower landfill nut 142, and the bridge girder 110 and The space between the PC slabs 120 is also filled so that the final height-adjusted PC slab 120 can be installed on the upper surface of the bridge girder 110.

Next, as shown in FIG. 3D, the second separable buried nut (TYPE 2) is formed of an upper buried nut 141 and a lower buried nut 142 connected so that vertical cylindrical buried nuts can communicate and separate upwards and downwards. is the same as the separable buried nut (TYPE 1) discussed above, with a difference in that the lifting load resistance flange 144 is excluded.

Accordingly, referring to FIG. 3D , the upper buried nut 141 is a vertical cylindrical member having a threaded portion formed on the inner surface and connected and communicated with the lower buried nut 142 as it is.

Referring to FIG. 3D, the lower buried nut 142 is also a vertical cylindrical member detachably connected to the lower part of the upper buried nut 141, and a lower buried flange 145 is formed at the lower portion, and the lower buried flange 145 is a PC slab (120) It can be seen that the initial setting to be exposed to the bottom surface from the inside is the same as TYPE 1, and only the lifting load resistance flange 144 is excluded.

Accordingly, the PC slab 120 in which the upper embedded nut 141 and the lower embedded nut 142 are embedded is initially set using a spacer and a lifting bolt on the upper surface of the bridge girder 110,

Only the lower buried flange 145 of the lower buried nut 142 resists the lifting load as a support plate.

Accordingly, as shown in FIG. 3D, the striking rod 146 is also inserted into the upper buried nut 141, and the lower end of the striking rod 146 penetrates the lower buried nut 142 to reach the inner upper surface of the lower buried flange 145. If you hit the top of the baton while in contact with

As the lower buried flange 145 of the lower buried nut 142 is separated from the upper buried nut 141, it comes into contact with the upper surface of the bridge girder 110. At this time, the lower buried flange 145 is set to be exposed on the bottom surface of the PC slab 120 so that it can be separated from the upper buried nut 141 by hitting, and the upper end of the lower buried nut 142 is the PC slab 120 It is the same that it is located inside so that it can not escape when hitting.

Accordingly, the striking bar 146 is removed, and the installation height of the PC slab 120 is adjusted according to rotation while the height adjustment bolt 147 is fastened to the upper embedded nut 141 and the lower embedded nut 142.

Accordingly, after removing the height adjustment bolt 147, the filling material 148 containing non-shrinkage mortar is filled into the upper landfill nut 141 and the lower landfill nut 142, and the bridge girder 110 and It is the same that the space between the PC slabs 120 is also filled so that the final height-adjusted PC slab 120 can be installed on the upper surface of the bridge girder 110.

Next, as shown in FIGS. 2 and 3E, the saddle 150 for lateral gradient is for adjusting the lateral gradient of the PC slab 120 installed on the upper surface of the bridge girder 110 after lifting.

At this time, since the saddle 150 for the lateral gradient is installed on the upper surface of the girder 110 for the bridge, the saddle 150 for the lateral gradient may be integrally formed during the production of the girder 110 for the bridge in advance, It doesn't matter if you install it separately on site.

Referring to FIG. 3E, such a bridge girder 110 includes a support block 151 for height adjustment and a floor plate support member 152.

As shown in FIG. 3E, the height adjustment support block 151 is formed on both side upper surfaces of the upper flange of the bridge girder 110,

The left and right side height adjustment support blocks 151 spaced apart in the lateral direction have a difference in height from each other, and by the both height adjustment support blocks 151 of the PC slab 120, it can be installed to be inclined in the transverse direction naturally do.

As shown in FIG. 3E, the bottom plate support member 152 is installed on the upper surface of the support block 151 for height adjustment and serves to directly support the PC slab 120. It can be seen that it is formed in a semicircular curved sphere, but the shape and materials are not otherwise limited.

At this time, the important point is that the top of the bottom plate support member 152 closely contacts the support groove 126 formed on the bottom surface of the PC slab 120 by the floor plate support member 152, and the saddle 150 for lateral gradient This prevents the bedding layer 153 from growing, and also serves to prevent leakage when the filling material is filled in the bedding layer.

To this end, it is preferable that the floor plate support member 152 continuously extends on the upper surface of the upper flange, and a plurality of height adjustment support blocks 151 supporting the floor plate support member 152 are spaced apart from each other.

In addition, regardless of the various lateral gradients of the bridge, it is not necessary to form a haunch portion (formed to be curved downward) on the PC slab 120, and thus, the PC slab 120 according to the exclusion of the haunch portion To increase the usability of the formwork for manufacturing do.

[PC slab 120 construction method of the present invention]

Figure 4 shows a flow chart of the PC slab 120 construction method of the present invention.

Referring to FIGS. 2 and 4, in the construction method of the PC slab 120 of the present invention, the bridge lower structure 200 is first constructed, and then the bridge girder 110 is mounted on the bridge lower structure 200, In addition to adjusting the height of the PC slab 120 in the longitudinal direction on the upper surface of the bridge girder 110 using the floor plate height adjusting device 140, the lateral gradient was adjusted using the saddle 150 for lateral gradient Next, it can be referred to as a method of assembling and connecting the PC slab 120 in the longitudinal direction using the bottom plate fastener 130.

First, as shown in FIG. 4, an upper receiving groove 123 is formed on the upper surface around the connection end surface B of the body portion 122, and an intermediate insertion groove 124 is formed in the middle of the connection end surface B. Thus, both PC slabs 120 installed adjacent to each other are mounted on the bridge girder 110 so that the upper receiving groove 123 and the intermediate insertion groove 124 horizontally contact and communicate with each other on the connection end surface (B).

Specifically, the bridge girder 110 is mounted on the constructed bridge substructure 200, but the housing 112, which is the shear connecting device A, is exposed on the upper surface of the upper flange 111 of the bridge girder 110. will form

That is, referring to FIG. 2, the bridge substructure 200 includes piers and abutments as described above, and may be constructed as a reinforced concrete structure in advance at the site.

In addition, the bridge girder 110 is formed in advance so that the housing 112, which is the shear connection device A, is positioned on the upper surface of the upper flange 111 by the stud 113 to expose the inside, and the housing ( 112) is formed continuously in the longitudinal direction, which is the extension direction of the bridge girder 110.

The PC slab 120 is initially set so that the housing 112 exposed on the upper surface of the bridge girder 110 mounted thereon and the shear pocket 121 of the PC slab 120 communicate with each other.

That is, referring to FIG. 2, the shear pockets 121 are formed so as to be spaced apart from each other on the PC slab 120, but since the housing 112 is formed continuously in the longitudinal direction, even if some construction errors occur, the PC There is no other problem in stiffening the slab 120 to the bridge girder 110.

As a result, the shear fabric?? ) and can be installed through the housing 112.

In addition, as shown in FIG. 4, the height and lateral gradient of the PC slab 120 mounted so that the shear pocket 121 and the housing 112 communicate with each other are adjusted by the bottom plate height adjusting device 140 and the saddle 150 for lateral gradient is adjusted using .

That is, when the PC slab 120 is initially set as a spacer when mounted on the upper surface of the bridge girder 110, the lateral gradient is adjusted using the saddle 150 for lateral gradient, and then the floor plate height adjusting device ( 140) to accurately set the installation height.

Accordingly, the saddle 150 for the horizontal gradient uses the bottom plate support member 152 formed on the top of the support block 151 for height adjustment,

As shown in FIG. 3B, the bottom plate height adjusting device 140 can use TYPE 1 or 2 using an upper embedded nut 141 and a lower embedded nut 142.

Next, the upper pad 131 and the middle pad 132 are inserted into the upper receiving groove 123 and the intermediate insertion groove 124 of the PC slabs 120, and the upper and lower through-holes are set to communicate The longitudinal bottom plate fastener 130 is installed (S120).

Specifically, as shown in FIG. 4, the PC slab 120 is connected in the longitudinal direction using the longitudinal bottom plate fastener 130.

That is, one PC slab 120 is installed first, the remaining PC slabs 120 are installed consecutively with each other in the longitudinal direction, and the PC slab 120 to be installed after also adds the installation height and lateral gradient. while setting.

Accordingly, the longitudinal bottom plate fastening hole 130 can be simply installed using the fastening bolt 133 by setting the upper padding plate 131 and the middle padding board 132 up and down, and using the final filler The upper receiving groove 123 and the intermediate insertion groove 124 may be closed.

Accordingly, as shown in FIG. 4, the shear connector 114 is fixedly installed in the housing 112 through the shear pocket 121, and the shear pocket 121 is filled with a filler 148 such as non-shrinkable mortar for the bridge girder ( 110) and the PC slab 120 are hardened to each other.

That is, since the shear pocket 121 and the housing 112 are already in communication with each other, the lower end of the shear connector 114 is fixed to the bottom of the housing 112 by welding or the like,

By filling the filler 148 that fills the communicating shear pocket 121 and the housing 112, the bedding layer is also hardened in a manner of finishing together.

The above description of the present invention is for illustrative purposes, and those skilled in the art can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims rather than the detailed description above, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts should be construed as being included in the scope of the present invention. do.

100: Bridge made using PC slab construction method
110: girder for bridge
111: upper flange 112: housing
113: stud 114: shear connector
120: PC slab
121: shear pocket 122: body
123: upper receiving groove 124: middle insertion groove
130: longitudinal bottom plate fasteners
131: upper back plate 131a: through hole
132: middle pad 132a: through hole
133: Fastening bolt 134: Moving tool
135: horizontal U-shaped rebar 136: insertion hole
137: insertion bolt
140: bottom plate height adjustment device
141: upper buried nut 142: lower buried nut
144: flange for lifting load resistance 145: buried flange
146: batting rod 147: height adjustment bolt
148: filler 150: saddle for transverse gradient
151: support block for height adjustment 152: bottom plate support member
200: bridge substructure
A: shear coupling device B: connection end face

Claims (10)

(a) An upper receiving groove 123 is formed on the upper surface around the connection end surface (B) of the body portion 122, and an intermediate insertion groove 124 is formed in the middle of the connection end surface (B), so that the connection end Mounting both PC slabs 120 installed adjacent to the bridge girder 110 so that the upper receiving groove 123 and the intermediate insertion groove 124 horizontally contact and communicate with each other on the side surface (B); and
(b) the upper receiving groove 123 and the intermediate insertion groove 124 of both PC slabs 120 are inserted with the upper padding plate 131 and the intermediate padding board 132, so that the upper and lower through-holes are in communication Installing a longitudinal bottom plate fastener 130 that is; including
The upper padding plate 131 and the middle padding board 132 are fastened bolts 133 through through-holes 131a and 132a communicating up and down at the connection end surface B of the PC slab 120 adjacent to each other. It is fastened so that it is installed while connecting the PC slab 120 in the longitudinal direction, and the intermediate pad 132 of the step (b) is inserted into the intermediate insertion groove 124 of the PC slab 120 on one side , Move toward the middle insertion groove 124 of the PC slab 120 on the other side to be connected, and set the middle portion of the middle pad 132 to pass through the connection end surface (B), so that the middle pad 132 is one PC A PC slab construction method that is completely inserted into the intermediate insertion groove 124 of the slab 120 so that the other side PC slab 120 does not become an obstacle in the process of adjoining one side PC slab 120. According to claim 1,
Both PC slabs 120 in step (a),
It is mounted on the upper surface of the bridge girder 110 equipped with the shear connection device (A), but the shear connection device (A) is buried so that the upper part is exposed on the upper surface of the upper flange 111 of the bridge girder 110 A housing 112 continuously formed in the longitudinal direction of the upper flange 111 using a section steel member;
A stud 113 extending downward from the bottom surface of the housing 112 so that the housing 112 is fixed to the upper flange 111 of the bridge girder 110; and
A PC slab construction method including a shear connector 114 fixed to the bottom of the housing 112 through the shear pocket 121 formed in the PC slab 120 but extending into the shear pocket 121. According to claim 1,
Between the steps (a) and (b), a step of installing a floor plate height adjusting device 140 to adjust the installation height of the PC slab 120 installed on the upper surface of the bridge girder 110 is further included. And the floor plate height adjusting device 140,
An upper embedded nut 141 having a threaded portion formed on the inner surface as a vertical cylindrical member and a flange 144 for lifting load resistance in the form of a horizontal plate integrally formed at the lower end; and
As a vertical cylindrical member detachably connected to the lower part of the upper buried nut 141, a lower buried nut 142 having a lower buried flange 145 initially set to be exposed to the bottom surface from the inside of the PC slab 120 is formed therein; including ,
A PC slab construction method in which the flange 144 for resisting the lifting load of the upper buried nut 141 and the lower embedded flange 145 of the lower embedded nut 142 resist the lifting load as a support plate. According to claim 1,
Between the steps (a) and (b), a step of installing a floor plate height adjusting device 140 to adjust the installation height of the PC slab 120 installed on the upper surface of the bridge girder 110 is further included. And the floor plate height adjusting device 140,
an upper buried nut 141 as a vertical cylindrical member having a threaded portion formed on an inner surface and connected to and communicating with the lower buried nut 142; and
As a vertical cylindrical member detachably connected to the lower part of the upper buried nut 141, a lower buried nut 142 having a lower buried flange 145 initially set to be exposed to the bottom surface from the inside of the PC slab 120 is formed therein; including ,
A PC slab construction method in which the lower buried flange 145 of the lower buried nut 142 resists the lifting load as a support plate. According to claim 1,
Between the steps (a) and (b), there is a further step of installing a saddle 150 for lateral gradient to adjust the lateral gradient of the PC slab 120 installed on the upper surface of the bridge girder 110 To include, the saddle 150 for the transverse gradient,
Height-adjusting support blocks 151 spaced apart to form a difference in height from each other in the transverse direction as formed on the upper surfaces of both sides of the upper flange of the bridge girder 110; And a bottom plate support member 152 including a semicircular curved sphere installed on the upper surface of the support block 151 for height adjustment and serving to directly support the PC slab 120 in the support groove 126; including,
The upper end of the bottom plate support member 152 is in contact with the support groove 126 formed on the bottom surface of the PC slab 120, and the saddle 150 for horizontal gradient makes the PC slab 120 regardless of the horizontal gradient. A PC slab construction method that allows not to form. (a) Place the bridge girder 110 on the constructed bridge substructure 200, but expose the housing 112, which is the shear connector (A), to the upper surface of the upper flange 111 of the bridge girder 110 forming;
(b) The housing 112 exposed on the upper surface of the mounted bridge girder 110 and the shear pocket 121 of the PC slab 120 are installed so that they communicate with each other, and the connection end surface of the body portion 122 (B) ) An upper receiving groove 123 is formed on the upper surface of the circumference, and an intermediate insertion groove 124 is formed in the middle of the connection end surface (B), so that the upper receiving groove 123 and the intermediate insertion groove 124 are formed on the connection end surface (B). Initial setting of the adjacent PC slabs 120 so that the grooves 124 are in horizontal contact with each other and communicate with each other;
(c) The height and lateral gradient of the PC slab 120 mounted so that the shear pocket 121 and the housing 112 are in communication with each other using the floor plate height adjusting device 140 and the saddle 150 for lateral gradient Adjusting by doing;
(d) connecting the PC slab 120 in the longitudinal direction using the longitudinal bottom plate fastener 130; and
(e) The shear connector 114 is fixedly installed in the housing 112 through the shear pocket 121, and the shear pocket 121 is filled with a filler 148 containing non-shrinkable mortar to bridge the girder 110 ) and the step of hardening the PC slab 120 to each other; including,
The longitudinal bottom plate fastener 130 in step (d) has an upper pad 131 and an intermediate pad 132 in the upper receiving groove 123 and the intermediate insertion groove 124 of the PC slabs 120 It is inserted and set so that the upper and lower through-holes 131a and 132a communicate, so that the upper and middle backing plates 131 and 132 are connected up and down on the connection end surface B of the PC slab 120 adjacent to each other. The fastening bolt 133 is fastened through the communicating through holes 131a and 132a so that the PC slab 120 is installed while connecting in the longitudinal direction, and the intermediate pad 132 is one side of the PC slab 120 In the state of being inserted into the intermediate insertion groove 124, move toward the intermediate insertion groove 124 of the other side PC slab 120 to be connected so that the middle portion of the intermediate padding plate 132 passes through the connection end surface (B) By setting, the intermediate pad 132 is completely inserted into the intermediate insertion groove 124 of the PC slab 120 on one side, and the other side PC slab 120 is an obstacle in the process of adjoining the PC slab 120 on one side. PC slab construction method to prevent this. According to claim 6,
The height of the PC slab 120 by the floor plate height adjusting device 140 in step (c),
As a vertical cylindrical member, a threaded portion is formed on the inner surface, and a horizontal plate-shaped lifting load resistance flange 144 is integrally formed at the bottom and is detachably connected to the lower part of the upper embedded nut 141 and the upper embedded nut 141 As a vertical cylindrical member, a lower buried flange 145 is formed at the lower portion, and the lower buried flange 145 is exposed to the bottom surface from the inside of the PC slab 120. Setting the lower buried nut 142;
Setting the PC slab 120 in which the upper buried nut 141 and the lower buried nut 142 are buried using spacers and lifting bolts on the upper surface of the bridge girder 110;
The striking rod 146 is inserted into the upper embedded nut 141, and the lower end of the striking rod 146 penetrates the lower embedded nut 142 to contact the upper inner surface of the lower embedded flange 145. ) by hitting the upper end of the buried nut 141 so that the lower buried flange 145 of the lower buried nut 142 is separated from the upper buried nut 141 and brought into contact with the upper surface of the bridge girder 110; and
Removing the striking rod 146 and fastening the height adjustment bolt 147 to the upper embedded nut 141 and the lower embedded nut 142 so that the installation height of the PC slab 120 is adjusted according to rotation; PC slab construction method including. According to claim 6,
The height of the PC slab 120 by the floor plate height adjusting device 140 in step (c),
As a vertical cylindrical member, a threaded part is formed on the inner surface, and an upper embedded nut 141 connected and communicated with the lower embedded nut 142 as it is and a vertical cylindrical member detachably connected to the lower portion of the upper embedded nut 141, the lower buried flange Setting the lower buried nut 142 so that the lower buried flange 145 is exposed to the lower surface from the inside of the PC slab 120;
Setting the PC slab 120 in which the upper buried nut 141 and the lower buried nut 142 are buried using spacers and lifting bolts on the upper surface of the bridge girder 110;
The striking rod 146 is inserted into the upper embedded nut 141, and the lower end of the striking rod 146 passes through the lower embedded nut 142 to contact the upper inner surface of the lower embedded flange 145, and the upper end of the striking rod By striking, the lower buried flange 145 of the lower buried nut 142 is separated from the upper buried nut 141 so that it comes into contact with the upper surface of the bridge girder 110; and
Removing the striking rod 146 and fastening the height adjustment bolt 147 to the upper embedded nut 141 and the lower embedded nut 142 so that the installation height of the PC slab 120 is adjusted according to rotation; PC slab construction method including. (a) An upper receiving groove 123 is formed on the upper surface around the connection end surface (B) of the body portion 122, and an intermediate insertion groove 124 is formed in the middle of the connection end surface (B), so that the connection end Mounting both PC slabs 120 installed adjacent to the bridge girder 110 so that the upper receiving groove 123 and the intermediate insertion groove 124 horizontally contact and communicate with each other on the side surface (B); and (b) the upper receiving groove 123 and the intermediate insertion groove 124 of the two PC slabs 120 are inserted with the upper padding plate 131 and the intermediate padding board 132 so that the through holes are in communication with each other up and down. By the PC slab construction method including; installing the longitudinal floor plate fastener 130 to be set,
The upper padding plate 131 and the middle padding board 132 are fastened bolts 133 through through-holes 131a and 132a communicating up and down at the connection end surface B of the PC slab 120 adjacent to each other. It is installed while connecting the PC slab 120 in the longitudinal direction by fastening, and the intermediate pad 132 is inserted into the intermediate insertion groove 124 of the PC slab 120 on one side. PC slab on the other side to be connected (120) by moving it toward the middle insertion groove 124 and setting the middle portion of the middle padding plate 132 to pass through the connection end surface (B), the middle padding board 132 is in the middle of the PC slab 120 on one side A bridge manufactured using a PC slab construction method that is completely inserted into the insertion groove 124 so that the other PC slab 120 does not become an obstacle in the process of adjoining the one PC slab 120. (a) Place the bridge girder 110 on the constructed bridge substructure 200, but expose the housing 112, which is the shear connector (A), to the upper surface of the upper flange 111 of the bridge girder 110 forming; (b) The housing 112 exposed on the upper surface of the mounted bridge girder 110 and the shear pocket 121 of the PC slab 120 are installed so that they communicate with each other, and the connection end surface of the body portion 122 (B) ) An upper receiving groove 123 is formed on the upper surface of the circumference, and an intermediate insertion groove 124 is formed in the middle of the connection end surface (B), so that the upper receiving groove 123 and the intermediate insertion groove 124 are formed on the connection end surface (B). Initial setting of the adjacent PC slabs 120 so that the grooves 124 are in horizontal contact with each other and communicate with each other; (c) The height and lateral gradient of the PC slab 120 mounted so that the shear pocket 121 and the housing 112 are in communication with each other using the floor plate height adjusting device 140 and the saddle 150 for lateral gradient Adjusting by doing; (d) connecting the PC slab 120 in the longitudinal direction using the longitudinal bottom plate fastener 130; And (e) fixedly installing the shear connector 114 to the housing 112 through the shear pocket 121, and filling the shear pocket 121 with a filler 148 containing non-shrinkable mortar to bridge the girder ( 110) and the step of hardening the PC slab 120 to each other; by the PC slab construction method, the longitudinal bottom plate fastener 130 of the step (d) is the upper receiving groove 123 of the PC slabs 120 and The upper backing plate 131 and the middle backing plate 132 are inserted into the middle insertion groove 124 and set so that the upper and lower through holes 131a and 132a communicate with each other, so that the upper backing plate 131 and the middle backing plate ( 132) allows the fastening bolts 133 to be fastened through through-holes 131a and 132a communicating upward and downward on the connection end surface B of the PC slab 120 adjacent to each other so that the PC slab 120 is longitudinally It is installed while connecting, and the intermediate padding plate 132 moves toward the intermediate insertion groove 124 of the PC slab 120 on the other side to be connected while being inserted into the intermediate insertion groove 124 of the PC slab 120 on one side. so that the middle part of the intermediate pad 132 passes through the connection end surface B, so that the intermediate pad 132 is completely inserted into the middle insertion groove 124 of the PC slab 120 on one side A bridge manufactured using a PC slab construction method that prevents the other side PC slab 120 from being an obstacle in the process of adjoining one side PC slab 120.

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