KR101693767B1 - Method for constructing precast floor plate with expansion joint - Google Patents

Abstract

The present invention relates to a method to construct a precast floor panel including an expansion joint. The present invention comprises: a step of forming a space by mutually separating or cutting each side of a preinstalled floor panel to an upper surface of a girder without forming an installation space in a part of a concrete floor; a step of inserting a pocket, included in an expansion joint precast floor panel, into a vertical front connection member formed in the girder when placing the expansion joint precast floor panel integrated with the expansion joint on the upper surface of the girder using a salvage device; and a step of completing installation by placing a small amount of non-shrinking mortar between the expansion joint precast floor panel, the preinstalled floor panel, and the pocket while removing the salvage device. As such, the present invention is capable of preventing damage to a structure, noise and dust, and increase in carbon dioxide caused by a construction site of the expansion joint and concrete-breaking for the formation of the installation space on the preinstalled space; reducing costs and time for construction by reducing expansion joint construction processes by salvaging the expansion joint precast floor panel only once for installation; and minimizing civil complaints due to traffic congestion.

Description

METHOD FOR CONSTRUCTION PRECAST FLOOR PLATE WITH EXPANSION JOINT FIELD OF THE INVENTION [0001]

The present invention relates to a method of installing an end precast deck having an expansion joint and, more particularly, to a method of constructing an end precast deck by installing an installation space in a part of a bottom plate concrete when an expansion joint is installed, The shear joints are formed on the vertical shear joints formed on the girders when the pre-cast decks, which are formed integrally with the shear joints, are seated on the upper surface of the girders by using a lifting device, After installing the pockets on the cast bottom plate, remove the lifting device and place a small amount of non-shrinkage mortar on the part between the pocket and the installed base plate and the stretch joint precast deck to complete the installation. According to the field construction of concrete breaking and expansion joint to form the installation space on the installed floor plate, It is possible to reduce the construction time and construction cost by shortening the construction process of stretch joint by preventing the increase of carbon generation, noise dust and structure damage, and lifting the pre-cast deck by stretching the pre- The present invention relates to a method of constructing a precast deck having an expansion joint that minimizes complaints about stagnation.

The expansion joint is installed at the opposing bridge deck bottom plate clearance (stream), smoothly accommodates displacement and deformation due to repeated shrinkage and expansion due to the temperature change and the continuous load of the vehicle running on the bridge, It is a device that plays a crucial role in preventing corrosion of bridges and corrosion of concrete.

Currently, the expansion joint construction technology forms an installation space in which the expansion joints can be inserted into the confronted bridge superstructure bottom plate, welds and fixes it with the main structure of the superstructure using the expansion joint and reinforcement bars in the site, It is being constructed in a somewhat more complex way of integrating with the superstructure by casting concrete.

As a result, the amount of carbon generated by the construction of the new concrete installation site and the site replacement is increased when the site is replaced, and it is difficult to partially replace the structure without damaging the structure.

For example, when the structure is a bridge, the bridge is composed of a plurality of bridge piers at the bottom and a plurality of bottom plates that are seated at the top of the bridge piers to form roads. In the portion where the end bridge is connected to the end bridge, A clearance is provided in a proper gap width so as to smoothly accommodate the dynamic behavior of the bobbin.

By closing these clearances in the horizontal direction, it is possible to allow the vehicle running on the upper side to run smoothly, while rainwater or various foreign substances can flow in and fall through the clearance, thereby polluting or corroding the lower facilities of the bridge To prevent this, a stretchable joint is installed at the play.

Since the expansion joint has the most impact on the safety and durability of the structure, it is the most damaged element and the most frequently replaced element among all the structures of the structure. Therefore, it is necessary to basically provide the complete expansion and sealing function and durability, Resistance to ultraviolet rays and various chemical substances at the time of exposure should be excellent, and rapid construction can be performed, so that traffic control during repairing should be reduced as much as possible.

However, in order to replace or repair the conventional expansion joint, it is necessary to cut and crush the after-concrete in the installation space formed with the expansion joint to separate the expansion joint from the bottom plate, insert the new expansion joint, A series of processes is performed.

Accordingly, structural problems of the bottom plate concrete can be caused in the process of cutting and separating the after-concrete at the time of replacing or repairing the expansion joint. If a replacement operation using the above-mentioned series of processes is used, a lot of time and resources are put into disassembly and the after concrete curing period of the re-installed expansion joint is required, so that the replacement time is long.

In order to solve such a problem, a concrete unplugged bridge connecting method which is disclosed in Korean Patent Registration No. 10-1127561 is disclosed.

The concrete non-shrinkage bridge connecting method comprises the steps of preparing a first non-shrinkage concrete part and a second non-shrinkage concrete part, and forming a first non-shrinkage concrete part and a second non- Preparing a first support portion and a second support portion which are spaced apart from each other, preparing a stretch joint having the first non-shrinkage concrete portion and the second shrinkage concrete portion, And connecting the first support portion and the second support portion by providing the first support portion and the second support portion between the first support portion and the second support portion.

However, in the conventional concrete unplugged bridging method, since the step portion must be formed by breaking the concrete so that the expansion joint device can be inserted into a part of the end floor panel, the carbon generated amount increases, the noise dust and the structure are damaged, The construction time is increased and the construction cost is excessively increased. As a result, there is a problem such as occurrence of traffic congestion caused by the traffic congestion, and a construction is made by the construction after the shrink concrete part is attached to the bottom plate. There is a problem that leakage occurs between the gaps.

In addition, it is difficult to simultaneously lift a non-shrinkage concrete portion and a stretch joint, both of which are composed of a pair of girders at both ends of the girder, and to cause rotation and an uneven deflection at the time of construction and transportation, There is another problem that the shrinkage concrete portion and the expansion shaft are broken. That is, it is impossible to apply a type in which the expansion joints such as the rail type and the monocell type are integrally formed in the longitudinal direction and the transverse direction, and the construction time is increased when the strong finger type expansion joint is separated.

Domestic Patent Registration No. 10-1127561

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide an installation space for a floor plate concrete, And then the expansion joint is integrally formed with the expansion joint. When the precast deck is mounted on the upper surface of the girder by using a lifting device, the vertical joint formed in the girder is stretched. After removing the lifting device, a small amount of non-shrinkage mortar is placed between the pocket and the installed base plate and the pre-cast bottom plate to complete the installation. Increase of carbon generation and noise due to concrete construction and expansion joint construction To prevent damages to structures and to secure the expansion joint precast deck at one stroke by reducing the construction time and construction costs by minimizing the complication of traffic control. The present invention provides a method for constructing a precast deck having an expansion joint.

In addition, the present invention is characterized in that an expansion bolt is formed to embed an eyebolt or a coupler in a bottom plate so as to be able to be coupled with a lifting device during manufacture of the expansion joint precast bottom plate, and to increase the lateral rigidity of the lifting device. A plurality of bottom plate fixing holes are provided in the longitudinal direction so that they can be easily combined and lifted and a lifting device can be used as a general purpose, so that they can be applied to presetting according to different sizes and temperature changes according to the amount of expansion and contraction There is another purpose in providing a precast deck construction method.

In addition, the present invention provides an excellent quality and durability by making a pre-cast bottom plate of a stretch joint part precast, and securely integrating and fixing the expansion joint to a bottom plate manufactured by precast, The present invention also provides a method for constructing a precast deck having an expansion joint.

In addition, the present invention relates to a pre-cast joint having a stretch joint to prevent the pre-cast bottom plate from being damaged due to rotation or uneven deflection because the pre-cast bottom plate is fixedly moved by the lifting device during installation and transportation, Another purpose is to provide a bottom plate construction method.

According to an aspect of the present invention,

A space forming step of forming a space such that an upper portion of the girder of the bridge is exposed between the installed floor slabs so that the expansion joint can be installed; A shear connector installation step of installing a vertical shear connector on the girder; And a flexible joint prefabricated on the upper surface of the flexible joint prefabric floor, the flexible joint prefabricated on the lower end of the flexible joint precast concrete floor, A plate making process; After the stretch joint precast deck is carried to the installation place, the lifting equipment is bound to the lifting device, and then the lifting device is lifted and rested on the upper part of the girder; A lifting device removing step of removing the lifting device; And a shrink-free mortar pouring step of placing an unshrunk mortar between the pocket and the expansion joint precast deck and the installed floor slab.

Here, the space forming step may include cutting a part of the installed floor slab vertically when the floor is replaced, cutting a space up to the upper surface of the girder to form a space, and, when the floor slab is newly installed, Each end is formed vertically and spaced from each other to form a space.

Herein, the vertical shear connector is vertically welded when the girder is steel, and partly vertically when the girder is concrete.

Here, the stretching joint may be any one of a strong finger type, a rail type, and a monocell type.

Here, in the stretch joint precast deck manufacturing process, the pair of stretch joint precast decks are formed so that one of the telescopic joints and the other of the telescopic joints are symmetrical with respect to each other, A first step of installing a plurality of bolt connecting members in the lateral direction on the base steel bar so as to be connectable with the lifting device; And two steps of curing the concrete by pouring the concrete up to the respective expansion joint heights, wherein the upper surface of the bolt connecting member is formed at the same height as the concrete and is laid out so as to be exposed to the outside.

Here, the bolt connecting member is a coupler having an eye bolt or an anchor at the bottom.

Here, if the eyebolts are applied to the bolt connecting member in the first step, each of the eyebolts penetrates the transverse reinforcing bar at the lower end thereof so as to withstand the load during lifting.

Here, gumming is formed in the longitudinal direction or in the transverse direction on the upper surface of the concrete.

Here, the expansion joint may be any one of a strong finger type, a rail type, and a monocell type.

Here, it is preferable that the lifting device has a cross-sectional shape of "H" or "I" and a plurality of longitudinally extending stretch joint precast decks are provided in the longitudinal direction, A longitudinal beam; And a transverse beam whose cross-sectional shape is formed as an "H" character or an "I " character and which is bolted transversely to the upper surface of the longitudinal beam and has a plurality of lifting rings formed on its upper surface.

Here, the longitudinal beams are provided with a plurality of bolt holes in the longitudinal direction on the bottom surface so as to be applicable to the stretch joint precast deck of different specifications.

Here again, the transverse beam is provided with a stiffener to increase lateral stiffness at a position where it is not in contact with the lifting hook.

Also, the expansion joint precast deck has a first concavo-convex shape formed by equally spaced first pockets, the first pockets being open at one end of the first installation deck, The first loop reinforcing bars are horizontally protruded from one side of the inner side and the second pockets having the front open at a position corresponding to the first pocket at the other end are formed at regular intervals to form second concave and convex portions, The second loop reinforcement is horizontally protruded from one side of the inner side of the second pocket of the second pocket so that the second loop reinforcement intersects with the first loop reinforcement. The third pockets are equally spaced to form third irregularities, and the third loop reinforcement is horizontally arranged so as to cross each other at one side of the inner side of each of the third pockets And a fourth concavo-convex portion is formed at equal intervals on the other end of the expansion joint pre-cast bottom plate at a position corresponding to the second pocket, the fourth pockets being open at the front, The fourth loop reinforcement is horizontally protruded so as to cross each other with the second loop reinforcement at one side of the inner side of the first and second concave-convex portions, and the binder is poured into the first and third concave-

According to the precast deck construction method of the present invention having the above-described construction, the installation space is not formed in a part of the bottom plate concrete and each side of the installed bottom plate is cut from the side to the upper surface of the girder, And then a stretch joint pre-cast bottom plate integrally formed with the stretch joint is separated from the vertical shear joint of the girder by using a lifting device. After inserting the pockets, remove the lifting device, and install a small amount of non-shrinkage mortar on the part between the pocket and the installed base plate and the expansion joint precast deck to install it on the installed floor plate Of the concrete generated for the formation of concrete To prevent damage to noise dust and structures, and to extend the stretch joint precast deck which is formed by integrally forming stretch joints at one stroke to shorten the construction process of stretch joint to reduce construction time and construction cost, The occurrence of complaints can be minimized.

In addition, according to the present invention, a reinforcement material is formed to embed an eyebolt or a coupler in a bottom plate so as to be able to be coupled with a lifting device during manufacture of the stretch-joint precast bottom plate and to increase lateral rigidity of the lifting device, And a plurality of bottom plate fixing holes are provided in the longitudinal direction so that the lifting device can be used for general purpose, so that the present invention can be applied to presetting according to different standards and temperature changes according to the amount of expansion and contraction.

Further, according to the present invention, since the pre-cast joint of the expansion joint precast is excellent in quality and durability, it is possible to firmly integrate and secure the expansion joint to the bottom plate manufactured by precast, .

Further, according to the present invention, since the expansion joint precast deck is firmly fixed and moved by the lifting device during the construction and transportation, it is possible to prevent rotation and uneven deflection and breakage.

FIG. 1 is a perspective view illustrating a construction of a stretch joint pre-cast deck applied to a pre-cast deck having a stretch joint according to an embodiment of the present invention.
FIGS. 2A to 2E are views for explaining a manufacturing process of a stretch joint precast deck having a finger type expansion joint according to an embodiment of the present invention.
3A and 3C are cross-sectional views illustrating the construction of a stretch joint precast deck having a rail type and a mono-cell type expansion joint according to another embodiment of the present invention.
4 is a perspective view showing a lifting device installed on a stretch joint pre-cast deck according to the present invention.
5A and 5B are sectional views of FIG.
6 is a perspective view showing the construction of a stretch joint precast deck applied to a precast deck construction method having a stretch joint according to another embodiment of the present invention.
7 is a process diagram for explaining a precast deck construction method having an expansion joint according to the present invention.
8A to 8F are cross-sectional views for explaining a method of constructing a precast deck having an expansion joint according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the construction of a stretch joint precast deck and a lifting device applied to a precast deck construction method having a stretch joint according to the present invention will be described in detail with reference to the accompanying drawings.

In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the present invention, and these may be changed according to the intention of the user, the operator, or the like. Therefore, the definition should be based on the contents throughout this specification.

FIG. 1 is a perspective view illustrating a construction of a stretch joint pre-cast deck applied to a pre-cast deck having a stretch joint according to an embodiment of the present invention. FIGS. 3A and 3C are views for explaining a manufacturing process of a stretch joint precast deck having a finger type expansion joint according to another embodiment of the present invention. 4 is a perspective view showing a lifting device installed on a stretch joint precast deck according to the present invention, Figs. 5A and 5B are sectional views of Fig. 4, Figs. 5A and 5B are cross- 6 is a perspective view showing the construction of a stretch joint pre-cast deck applied to a precast deck construction method having a stretch joint according to another embodiment of the present invention.

Referring to FIGS. 1 and 6, a pair of pre-casting fabrics is manufactured so that they are symmetrical with each other to have the same size, and the stretch joint 20 is integrally formed at one end . At this time, the stretch joint precast deck 10 is formed to have the same size as the width of the road so that the construction can be performed at one time, and the stretch joint 20 can be formed of any one of strong finger type, rail type, Method is applied. Also, in the stretch joint precast deck 10, pockets 13 are formed for the insertion of the vertical shear connector 5 provided on the girder 3.

First, according to an embodiment of the present invention, a finger-type stretch joint precast deck 10 is stretchably joined to an underlying reinforcing bar 11 such that a stretch joint 20 is buried as shown in FIG. 2A A plurality of bolt connecting members 30 are installed in the base steel bar 11 in the lateral direction so as to be connectable with the lifting device 40. [ At this time, the bolt connecting member 30 is an eye bolt as shown in FIG. 5A or a coupler having an anchor at the bottom as shown in FIG. 5B. Further, when the eyebolt is applied to the bolt connecting member 30, it is preferable that each eyebolt penetrate the transverse reinforcing bar 26 at the lower end thereof so as to withstand the load during lifting.

2B, a step plate 22 of a stretch joint 20 is formed on the upper surface of each of the embedding plates 21, and as shown in FIG. 2C, The expansion joint plate 23 of the joint 20 is provided. At this time, the step plate 22 may not be installed according to the installation standard.

2D, the waterproof sheet 24 of the expansion joint 20 is installed therebetween, and the concrete C is pushed up to the height of each of the expansion joint plates 23 as shown in FIG. 2E. The upper surface of the bolt connecting member 30 is formed to have the same height as the concrete C and is laid so as to be exposed to the outside. At this time, it is preferable to form the grooming 25 in the longitudinal direction or the transverse direction in order to reduce the noise and to prevent the vehicle braking from being hampered on the upper surface of the concrete (C).

When a rail type expansion joint (20 mm) is installed according to another embodiment of the present invention, a rail beam 22 설치된 provided with an anchor bar 21 에 as shown in FIG. A plurality of bolt connecting members 30 are installed laterally in the base steel bar 11 so as to be connectable with the lifting device 40 and then a connecting rubber 23 ㅄ is attached to the rail beam 22 를 The upper surface of the bolt connecting member 30 is formed to have the same height as the concrete C and is laid so as to be exposed to the outside, by curing the concrete C to the height of each rail beam 22.. At this time, it is preferable to form a grooming (not shown) in the longitudinal direction or the transverse direction to reduce the noise and prevent the vehicle braking from being hampered on the upper surface of the concrete.

When the mono-cell type expansion joint 20 "is installed, the side plate 22" provided with the plurality of anchor bars 21 "is connected to the foundation steel bar 11 as shown in FIG. 3b, A plurality of bolt connecting members 30 are installed laterally in the base steel bar 11 so as to be able to be connected to the side plate 22 ' The upper surface of the bolt connecting member 30 is formed to have the same height as the concrete C and is laid so as to be exposed to the outside. At this time, it is preferable to form a grooming (not shown) in the longitudinal direction or the transverse direction to reduce the noise and prevent the vehicle braking from being hampered on the upper surface of the concrete.

The lifting device 40 according to the present invention has a cross-sectional shape of "H" or "I" and is provided with a plurality of longitudinally extending pairs of stretch joint precast decks 10, A longitudinal beam 41 which is bolted to the longitudinal beam 41 and has a sectional shape of "H" or "I" and is bolted transversely to the upper surface of the longitudinal beam 41, And a transverse beam 43 in which a lifting loop 45 is formed. At this time, the longitudinal beam 41 is provided with a plurality of bolt holes 47 in the longitudinal direction so as to be applicable to the stretch joint precast deck of different specifications, and the transverse beam 43 is supported by the lifting hook 45 A stiffener 49 is provided to increase the lateral stiffness at a position where the stiffener 49 is not interfered with.

As shown in FIG. 6, the expansion joint precast deck 10 according to the present invention includes a first pocket 1a opened at one end of a base installation floor 1 at regular intervals A first looped reinforcing bar 1c is horizontally protruded from one side of an inner surface of each of the first pockets 1a and a first pocket 1a is formed at the other end thereof, And second pockets 1d having openings at positions corresponding to the first and second pockets 1d are formed at equal intervals to form second concavo-convexes 1e. In the inner surface of each second pocket 1d, Is horizontally protruded so as to intersect with the first loop reinforcement 1c, a third pocket 12 having a front open at a position corresponding to the first pocket 1a is provided at the end of one of the expansion joint precast decks. Are formed at regular intervals to form third irregularities 13. The first loop reinforcement 1c and the second loop reinforcement 1c are formed on one side of the inner side of each third pocket 12, The third loop reinforcement 14 is horizontally protruded so as to intersect with the second pocket 1d and the fourth pocket 15 having the front open at a position corresponding to the second pocket 1d at the other end of the expansion joint precast deck And fourth protrusions 16 are formed at regular intervals so that the fourth loop reinforcement 17 is horizontally protruded so as to intersect with the second loop reinforcement 1f at one side of the inner surface of each fourth pocket 15 (1d, 15) in the first and third pockets (1a, 12), between the first and third concave and convex portions (1b, 13), between the second and fourth concave and convex portions Each shrinkage mortar is poured and integrated.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method of constructing a precast deck having an expansion joint according to the present invention will be described in detail with reference to the accompanying drawings.

8A to 8F are views for explaining a method of constructing a precast deck having an expansion joint according to the present invention, and FIGS. 8A to 8F are views for explaining a method of constructing a precast deck having an expansion joint according to the present invention. Sectional view.

7 to 8F, a method for precast deck construction having a stretch joint according to the present invention includes a step of forming a space (S10), a step of installing a shear connector (S20), a step of forming a pre- (S30), a placing process (S40), a lifting device removing process (S50), and a non-shrink molding placing process (S60).

&Quot; Spatial Forming Process-S10 &

First, as shown in FIG. 8A, a space is formed such that the upper portion of the girder 3 of the bridge is exposed between the installed floor slabs 1 so that the expansion joint 20 can be installed. Here, in the case of replacement work, a part of the foundation installation bottom plate 1 is vertically cut, but it is cut to the upper surface of the girder 3 to form a space. In the case of new construction, the connection is made to the expansion joint precast bottom plate 10 Are vertically formed and spaced from each other to form a space.

"Shear Connector Installation Process-S20"

Then, as shown in Fig. 8 (b), the vertical shear connector 5 is installed on the upper portion of the girder 3. At this time, the vertical shear connector 5 vertically welds the girder 3 as shown in the figure when the girder 3 is made of steel, and vertically embeds the lower end thereof as an anchor when the girder 3 is concrete.

"Stretch joint precast deck manufacturing process-S30"

As shown in FIG. 8C, a pair of stretch joint precast decks 10 are manufactured as described above, and a lifting device 40 is installed on a pair of stretch joint precast decks 10, .

&Quot; Seating process-S40 "

Then, as shown in FIG. 8D, after the stretch joint precast deck 10 on which the lifting device 40 is installed is carried to the installation site, the lifting device CR is secured to the lifting device 40 and lifted up And is seated on the upper part of the girder 3. At this time, the lifting device (40) can be lifted at the manufacturing factory and loaded on the transportation equipment. In addition, the vertical shear connector 5 is inserted into the pockets 13 of the stretch joint precast deck 10 when the girder 3 is seated.

"Lifting device removal process-S50"

Then, the lifting device 40 is removed from the stretch joint precast deck 10 as shown in Fig. 8E.

"No shrinkage mortar casting process-S60"

Finally, as shown in FIG. 8F, the shrink-free mortar M is sandwiched between the pockets 13 of the expansion joint precast deck 10 and the expansion joint precast deck 10 and the installed foundation deck 1, And the installation is completed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood, however, that the invention is not to be limited to the specific forms thereof, which are to be considered as being limited to the specific embodiments, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims. .

3: girder 5: vertical shear connector
10: Expansion joint Precast bottom plate 20: Expansion joint
30: bolt connecting member 40: lifting device

Claims (12)

A space forming step of forming a space such that an upper portion of the girder of the bridge is exposed between the installed floor slabs so that the expansion joint can be installed;
A shear connector installation step of installing a vertical shear connector on the girder;
The pair of vertical expansion joint precast decks are arranged in a pair so that one of the expansion joints and the other of the expansion joints symmetrically symmetrical with each other to have pockets at the corresponding portions are embedded in the respective ends of the vertical joint members, And a plurality of bolt connecting members which are couplers having an eyebolt or an anchor at a lower portion thereof are installed in the base steel bar so as to be able to be connected to the lifting device. When the eyebolt is applied to the bolt connecting member, The bolt connecting member is formed to have the same height as the concrete and is exposed to the outside so that the eye bolt can withstand the load when lifting the bolt, through the transverse reinforcement at the lower end, The concrete is laid on the upper surface of the concrete so as to form a grooming in the longitudinal direction or the transverse direction, A joint precast deck manufacturing process;
After the stretch joint precast deck is carried to the installation place, the lifting equipment is bound to the lifting device, and then the lifting device is lifted and rested on the upper part of the girder;
A lifting device removing step of removing the lifting device; And
Shrink mortar pouring step of placing a non-shrinking mortar between the pocket and the expansion joint precast deck and the installed bottom plate,
The lifting device comprises:
A plurality of longitudinal joints are provided in a pair of said expansion joint precast decks in a cross-sectional shape of "H" or "I ", and are bolted to said eye bolts or couplers, A longitudinal beam having a plurality of bolt holes in the longitudinal direction on the bottom surface so as to be applicable to the precast deck, and a cross-sectional shape of "H" or "I" And a transverse beam having a plurality of lifting rings formed on an upper surface thereof and provided with a reinforcing member to increase transverse rigidity at a position where the lifting rings are not in contact with the lifting ring, Method of casting the bottom plate. The method according to claim 1,
In the space forming step,
A plurality of end portions corresponding to the elongated joint precast deck are vertically formed in the case of new construction, and a plurality of end portions corresponding to the elongated joint precast deck are vertically formed , And a space is formed by mutually spacing each other. The method according to claim 1,
The vertical shear connector,
Wherein the girder is vertically welded when the girder is made of steel and partly vertically buried when the girder is concrete. The method according to claim 1,
Preferably,
A method of manufacturing a pre-cast bottom plate having a stretch joint, wherein a method selected from the group consisting of a strong finger type, a rail type, and a monocell type is applied delete delete delete delete delete delete delete The method according to claim 1,
The stretch joint precast deck comprises:
A first uneven surface is formed by equally spaced first pockets having openings on one of the ends of the base installation bottom plate, and a first loop reinforcement protrudes horizontally from one side of the inner side of each of the first pockets And a second concave and a convex portion is formed by equally spacing second pockets having openings at the positions corresponding to the first pockets at the other end, When the loop reinforcement is horizontally protruded so as to cross each other with the first loop reinforcement, third pockets having openings at the positions corresponding to the first pockets are provided at equal intervals on one of the ends of the expansion joint precast deck And a third loop reinforcement is horizontally protruded so as to intersect with the first loop reinforcement at one side of the inner side of each of the third pockets, and the other one of the expansion joint precasts And fourth pockets formed at an end portion of the bottom plate at equal intervals so as to be open at a position corresponding to the second pockets are formed at regular intervals so that a fourth loop reinforcement is formed at one side of the inner side of each fourth pocket, Wherein the second loop reinforcement is horizontally protruded so as to mutually intersect with the second loop reinforcement, and the joining material is poured into the first and third concave-convex portions, the second and fourth pockets, and integrated.

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