Prefabricated slab bridge using continuous slabs and construction method thereof

Abstract

Disclosed herein is a precast slab bridge using a continuous slab and a construction method thereof, wherein cast-in-place concrete or a precast continuous slab is installed on a continuous point portion of a multi-span bridge to make the precast slab continuous, wherein the bridge can be constructed without installing an expansion joint device at the continuous point portion. The precast slab bridge comprises precast slabs installed to be spaced apart from each other in a longitudinal direction and facing each other at a continuous point portion (A) of a bridge substructure; and a continuous slab formed such that, in a state where the lower portions of the precast slabs are spaced apart from each other, the upper portions of the precast slabs are formed to be continuous.

Description

[0001] This application claims priority to and the benefit of Korean Patent Application No. 2020-0157718, filed on November 23, 2020, the disclosure of which is incorporated herein by reference in its entirety. Technical Field

[0002] The present disclosure relates to a precast slab bridge using continuous slabs and a construction method thereof, and more particularly, to a precast slab bridge using continuous slabs and a construction method thereof, wherein cast-in-place concrete or precast continuous slabs are installed on continuous point portions of a multi-span bridge to make the precast slabs continuous, wherein the bridge can be constructed without installing expansion joint devices at the continuous point portions. Background Art

[0003] Figure 1A is an exemplary view of a continuous construction method for conventional precast beams.

[0004] according to Figure 1A , forming a continuous point portion where the pier 30 and the beam 60 are connected to each other. It can be seen that the beams 60 connected to each other in the longitudinal direction at the continuous point portion are each manufactured in the form of a plate member using precast concrete.

[0005] Here, the piers 30 are column-type structures each having a roof portion formed on an upper end. In some cases, the piers 30 are connected by installing beams 60 on the upper surface of the roof portion so as to be spaced apart from each other in the longitudinal direction. However, it can be seen that Figure 1A In the case of, a separate beam 20 having a U-shaped cross-section is installed on the upper portion of the pier 30, the connecting end portion between each pair of beams 60 is configured to be placed on the upper surface of the beam 20, the connecting steel bars 28 on the upper surface of the beam 20 and the connecting steel bars 27 of the beam 60 are connected to each other, and then all the connecting end portions of the connected components are constructed to be embedded and integrated at the continuous point portion using a continuous point portion filler (for example, non-shrinkage mortar (not shown) and concrete) and a continuous point portion formwork.

[0006] Therefore, it can be seen that the connecting end portions of the pier 30, the cross beam 20 and the beam 60 are constructed to behave integrally due to the continuous point partial filling.

[0007] Figure 1B is an exemplary view of a continuous construction method for a conventional precast bridge deck.

[0008] That is, it can be seen that the steel beam 1 is used as a bridge, and the connecting end portion of the precast bridge deck 70 on which the shear reinforcement 71 is formed is installed to be placed on the upper surface of the steel beam 1, and due to the shear connector 9 installed on the upper surface of the steel beam 1, concrete (not shown) can be laid on the upper surface of the steel beam 1 and the upper surface of the precast bridge deck 70 with a uniform thickness to thereby integrally construct the plate.

[0009] That is, it can be seen that when a bridge is conventionally constructed in a multi-span manner, the end portions of the beams, which are installed on the upper surface of the piers in the longitudinal direction so as to be spaced apart from each other and face each other, allow the continuous point portions and the slab of the bridge to be integrally constructed by forming a continuous point portion filler (e.g., non-shrinkage mortar and concrete) together with or separately from the slab concrete.

[0010] However, the expansion joint device (not shown) is installed at the continuous point portion to absorb the plate shrinkage due to temperature, etc. to prevent cracking and breaking, and there is a limitation that the problem of defects of the expansion joint device over time is inevitable.

[0011] Figure 1C 1 is an exemplary view of the construction of the continuous point portion of the conventional precast panel 10.

[0012] That is, it can be seen that the bottom surface of the end portion of the precast panel 10 is installed to be supported between the pier 12 and the abutment 11, the connecting steel material 13 is formed on the end surface of the precast panel 10, and an adhesive 14 is used to make them contact each other horizontally, and in this state, the end portion of the precast panel 10 is set to be pressed using the steel bar bundle 15 and the steel bar bundle 16.

[0013] Furthermore, it can be seen that continuous point portion filler C, such as non-shrinkage mortar and concrete, is formed so that all end surfaces of the precast panel 10 are integrated with each other.

[0014] In other words, it can be seen that according to Figure 1A to Figure 1C , conventional beams, bridge decks and precast panels are constructed so that the end portions are arranged to be spaced apart from each other and are fully integrated with each other at continuous point portions.

[0015] Therefore, the expansion joint device should be installed at the continuous point portion, but in this case, there is a limitation, and in addition to the problems of deterioration of vehicle drivability and noise generation, the following problems may occur: poor management of the expansion joint device may cause deterioration of the bridge bearing due to water leakage from the location where the expansion joint device is constructed, etc. However, a specific construction method that allows the continuous point portion of a multi-span bridge to be constructed without installing the expansion joint device in a precast slab bridge is not described in detail.

[0016] [Related technical literature]

[0017] [Patent Document]

[0018] (Patent Document 0001) Korean Patent No. 10-1519086 (Invention Title: Bridge and Bridge Construction Method Using Prefabricated T-Beams, Publication Date: May 12, 2015)

[0019] (Patent Document 0002) Korean Patent Publication No. 10-2009-0066558 (Invention Title: Continuous Precast Slab Bridge Deck, Publication Date: June 24, 2009)

[0020] (Patent Document 0003) Korean Patent No. 10-0398021 (Invention Title: Prestressed Concrete Slab with Formed Steel Embedded Therein and Method for Temporarily Constructing Single-Span or Multi-Span Bridge Using the Same, Publication Date: May 23, 2002) Summary of the invention

[0021] The present disclosure relates to providing a precast slab bridge using continuous plates and a construction method thereof, wherein the construction method is capable of integrating end portions of precast slabs spaced apart from each other at continuous point portions using continuous point portion fillers in a multi-span bridge, thereby allowing the end portions to be continuous without separately installing an expansion joint device, thereby solving problems that may occur due to the installation of the expansion joint device.

[0022] The present disclosure also relates to providing a prefabricated slab bridge using continuous plates and a construction method thereof, wherein the construction method is capable of connecting only portions of the upper portions of the end surfaces of the plates of a certain length to disperse cracks occurring on the upper portions of the end surfaces, thereby eliminating the need to install high-rigidity reinforcement materials (connecting steel materials) to prevent cracks from being concentrated on the upper portions of the end surfaces of the continuous point portions due to all the end surfaces of the slab bridge being integrated with each other, thereby preventing a reduction in durability due to the cracks.

[0023] The present disclosure provides a precast slab bridge using continuous slabs, the precast slab bridge comprising: precast slabs installed to be spaced apart from each other and facing each other in the longitudinal direction at continuous point portions A of a bridge substructure; and continuous slabs formed so that in a state where lower portions of the precast slabs are spaced apart from each other, upper portions of the precast slabs are formed to be continuous, wherein an expansion joint device is not installed at the continuous point portions A, and longitudinal extension and contraction of the precast slabs are absorbed by expansion joints installed at the start and end points of the continuous bridge.

[0024] The present disclosure also provides a method for constructing a precast slab bridge using a continuous plate, the construction method comprising: (a) constructing a pier as a bridge substructure to be spaced apart from each other in the longitudinal direction between two abutments so as to form a continuous point portion A; (b) installing the precast slabs to be spaced apart from each other on the continuous point portion A; and (c) installing the continuous plate to be inserted into a hollow portion S between the precast slabs facing each other, wherein the precast slabs are installed to be spaced apart from each other in the longitudinal direction and face each other at the continuous point portion A of the bridge substructure, the continuous plate is formed so that the upper portion of the precast slab is formed to be continuous in a state where the lower portions of the precast slabs are spaced apart from each other, and therefore, without installing an expansion joint device at the continuous point portion A, the longitudinal expansion and contraction of the precast slabs are absorbed by the expansion joints installed at the starting point and the end point of the continuous bridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and other objects, features and advantages of the present disclosure will become more apparent to those skilled in the art by describing in detail exemplary embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0026] Figure 1A is an exemplary view of a continuous construction method for conventional precast beams.

[0027] Figure 1B is an exemplary view of a continuous construction method for a conventional precast bridge deck.

[0028] Figure 1C An exemplary view of the construction of a continuous point section of a conventional precast panel.

[0029] Figure 2 and Figure 3 is an exemplary view of the construction of a continuous point section of a precast slab bridge using a continuous slab according to the present disclosure.

[0030] Figure 4A , Figure 4B , Figure 4C , Figure 4D and Figure 4E The steps of constructing a continuous point section of a precast slab bridge using continuous slabs made of cast-in-place concrete according to the present disclosure are shown.

[0031] Figure 5A , Figure 5B and Figure 5C The steps of constructing a continuous point portion of a precast slab bridge using the precast continuous slab according to the present disclosure are shown.

[0032] Description of Figure Numbers

[0033] 1: Steel beam;

[0034] 9: Shear connector;

[0035] 10, 110: prefabricated panels;

[0036] 11: abutment;

[0037] 12, 30, 131: bridge piers;

[0038] 13: Connecting steel materials;

[0039] 14: adhesive;

[0040] 15, 16: tendons;

[0041] 20: beam;

[0042] 27, 28: Connecting steel bars;

[0043] 60: beam;

[0044] 70: Prefabricated bridge deck;

[0045] 71, 114: shearing steel bars;

[0046] 100: Prefabricated slab bridge;

[0047] 111: continuous steel bar;

[0048] 112: upper end surface;

[0049] 113: lower end surface;

[0050] 115: continuous point partial reinforcement;

[0051] 116: spacer template;

[0052] 117: template receiving groove;

[0053] 120: continuous plate;

[0054] 121: shear groove;

[0055] 122: Shear groove reinforcement;

[0056] 130: Bridge substructure;

[0057] 132: abutment;

[0058] 133: Bridge support;

[0059] A: continuous point part;

[0060] C: continuous point partial filling;

[0061] S: hollow part. DETAILED DESCRIPTION

[0062] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings to allow those skilled in the art to easily practice the present disclosure. However, the present disclosure may be implemented in various forms and is not limited by the embodiments described herein. In addition, in order to clearly describe the present disclosure, parts not related to the description have been omitted from the accompanying drawings, and similar parts will be indicated by the same reference numerals throughout the specification.

[0063] Throughout the specification, when a part is described as “comprising” a certain element, unless the context clearly indicates otherwise, this indicates that the part may further include the other element rather than excluding the other element.

[0064] [Precast slab bridge 100 using continuous slab according to the present disclosure]

[0065] Figure 2 and Figure 3 1 is an exemplary view of construction of a continuous point portion of a precast panel bridge 100 using a continuous panel 120 according to the present disclosure.

[0066] The precast slab bridge 100 using the continuous slab 120 is a slab bridge in which, in a state where the pier 131 is first constructed as the bridge substructure 130, the precast slabs 110 are directly installed on the upper surface of the pier 131 using the bridge support 133 so as to be spaced apart from each other without installing the beam on the upper surface of the pier 131 as the continuous point portion A to construct the bridge.

[0067] Here, lower portions of the end portions of the prefabricated panels 110 are spaced apart from each other so as not to be integrated, and the continuous panel 120 is formed on the hollow portion S formed on the upper portion of the end portions of the prefabricated panels 110 to integrate the upper portion.

[0068] In this way, only the upper portion of the precast panel 110 is constructed to be continuous, and the lower portion thereof is discontinuous and spaced apart from each other, so that the longitudinal expansion and contraction of the precast panel can be absorbed. Therefore, since there is no need to install an expansion joint device, defects such as deterioration and corrosion of a bridge support or a bridge pier can be prevented, and the driving performance of a vehicle running on the upper surface of the precast panel 110 can be ensured.

[0069] Here, the prefabricated panel 110 can be used as follows: Figure 2 The continuous slab 120 made of cast-in-place concrete as shown in FIG. Figure 3 The position of the prefabricated continuous plate 120 shown in FIG.

[0070] first, Figure 2 The precast panel bridge 100 using the continuous panel 120 according to the present disclosure shown in FIG. 1 includes a precast panel 110 , the continuous panel 120 made of cast-in-place concrete, and a bridge substructure 130 .

[0071] like Figure 2 As shown in FIG, the precast panel bridge 100 is constructed on a bridge substructure 130. Specifically, with respect to the upper portion of the pier 131 constructed between the abutments, at the continuous point portion A, only the upper portion of the end portion of the precast panel 110 is integrated and connected to each other using a continuous panel 120 made of cast-in-place concrete.

[0072] Here, the continuous point portion A may refer to a portion from the pier 131 to two side locations spaced apart from the pier 131 .

[0073] As the bridge substructure 130, a pier 131 is constructed on the ground using concrete so as to extend upward, such as Figure 2 The pier 131 is constructed such that a cap portion is formed on a head portion thereof to support a bottom surface of an end portion of the precast panel 110, and is formed in various cross sections using cast-in-place concrete or precast concrete.

[0074] Therefore, it can be seen that the precast panel 110 is constructed to be continuous in the longitudinal direction on the upper surface of the pier 131 .

[0075] like Figure 2 As shown in FIG, a horizontal plate member made of reinforced concrete and formed in advance in a factory so as to have a uniform thickness and a quadrilateral cross section within a range allowing transportation and installation is used as the precast panel 110. Specifically, a horizontal plate member installed on the upper surface of the pier of the continuous point portion A in the longitudinal direction and having continuous reinforcement 111 formed to be horizontally drawn out from its upper end surface to allow the precast panel 110 to be continuous is used as the precast panel 110.

[0076] Here, end surfaces of the precast panels 110 are spaced apart from each other in the longitudinal direction in an upper space of an upper surface of the pier 131 , and are divided into an upper end surface 112 and a lower end surface 113 .

[0077] According to the present disclosure, it can be seen that the upper end surface 112 is initially formed by being spaced apart from the end surface due to a hollow portion S formed downwardly from the upper surface of the end portion of the prefabricated panel 110, as shown in FIG. Figure 2 The hollow portion S is formed in a groove shape having a predetermined depth and width with respect to an end edge of the end surface.

[0078] Furthermore, it can be seen that the lower end surface 113 is below the hollow portion S and is formed as an end surface of the prefabricated panel 110 .

[0079] It can be seen that the shear reinforcement 114 is formed on the upper surface of the hollow portion S so as to be disposed below the continuous reinforcement 111 , and the continuous reinforcement 111 formed to extend from the upper end surface are connected to each other through the continuous point portion reinforcement 115 .

[0080] Therefore, it can be seen that the upper end surface 112 and the lower end surface 113 are set to be spaced apart from each other due to the two precast panels 110 being spaced apart from each other, and while the lower portion of the precast panel 110 is not allowed to be continuous, the upper portion of the precast panel 110 is allowed to be continuous due to the continuous panel 120 made of cast-in-place concrete formed in the hollow portion S on the upper portion of the precast panel 110.

[0081] It can be seen that since it is possible to absorb the longitudinal expansion and contraction of the precast panel 110 at the end portion of the precast panel, there is an effect that there is no need to install the expansion joint device at the continuous point portion.

[0082] Next, the continuous slab 120 made of cast-in-situ concrete is cast-in-situ concrete laid on the hollow portion S between the upper end surfaces 112 of the precast slabs 110 facing each other. Figure 2 As shown in FIG, a continuous slab 120 made of cast-in-place concrete is formed such that a continuous reinforcement 111, a shear reinforcement 114, and a continuous point portion reinforcement 115 are embedded.

[0083] For this purpose, it can be seen that a spacer formwork 116 is mounted across the upper surfaces of the two lower end surfaces 113 facing each other and forming a continuous slab 120 made of cast-in-place concrete.

[0084] It can be seen that when the template accommodating groove 117 is pre-formed in the upper surfaces of the two lower end surfaces 113 facing each other and the spacing template 116 is installed to be inserted into the template accommodating groove 117, the upper surface of the spacing template 116 can be set to the same height as the upper surfaces of the two lower end surfaces 113, and it can be seen that cast-in-place concrete is not laid on the lower portion of the precast panel 110.

[0085] Then, in Figure 3 The precast slab bridge 100 using the continuous slab 120 according to the present disclosure shown in FIG. 1 includes a precast slab 110, a precast continuous slab 120 and a bridge substructure 130, and Figure 2 The precast slab bridge 100 differs in that the continuous slab 120 is manufactured using precast concrete.

[0086] Therefore, if Figure 3As shown in FIG. 1 , as described above, the precast panel bridge 100 is constructed on the bridge substructure 130. Specifically, with respect to the upper portion of the pier 131 constructed between the abutments, at the continuous point portion A, only the upper portion of the end portion of the precast panel 110 is integrated and connected to each other using the precast continuous panel 120.

[0087] Here, as described above, the continuous point portion A may refer to a portion from the pier 131 to two side locations spaced apart from the pier 131 .

[0088] As the bridge substructure 130, as described above, the pier 131 is constructed on the ground using concrete so as to extend upward. Figure 3 The pier 131 is constructed such that a cap portion is formed on a head portion thereof to support a bottom surface of an end portion of the precast panel 110, and is formed into various cross sections using cast-in-place concrete or precast concrete.

[0089] As described above, the precast panel 110 is constructed to be continuous in the longitudinal direction on the upper surface of the pier 131 .

[0090] like Figure 3 As shown in FIG. 1 , as described above, a horizontal plate member made of reinforced concrete and formed in advance in a factory so as to have a uniform thickness and a quadrilateral cross section within a range allowing transportation and installation is used as a precast panel 110. Specifically, the horizontal plate member is installed on the upper surface of the pier of the continuous point portion A in the longitudinal direction, and it can be seen that the horizontal plate member is similar to the precast panel 110. Figure 2 Different from the precast panel 110, the continuous steel bars 111 are not horizontally drawn out from the upper end surface thereof.

[0091] Here, as described above, the end surfaces of the precast panels 110 are spaced apart from each other in the longitudinal direction in the upper space of the upper surface of the pier 131 , and are divided into the upper end surface 112 and the lower end surface 113 .

[0092] According to the present disclosure, as described above, it can be seen that the upper end surface 112 is initially formed by being spaced apart from the end surface due to the hollow portion S formed downward from the upper surface of the end portion of the prefabricated panel 110, as shown in FIG. Figure 3 The hollow portion S is formed in a groove shape having a predetermined depth and width with respect to an end edge of the end surface.

[0093] Furthermore, as described above, it can be seen that the lower end surface 113 is below the hollow portion S and is formed as the end surface of the prefabricated panel 110 .

[0094] It can be seen that the shear reinforcement 114 is formed on the upper surface of the hollow portion S. Since the continuous plate 120 made of precast concrete is used, it can be seen that the shear reinforcement 114 is formed on the upper surface of the hollow portion S. Figure 2 Unlike in the embodiment, the continuous steel bars 111 and the continuous point portion steel bars 115 which are arranged to face each other are not formed.

[0095] according to Figure 3 As described above, it can be seen that the upper end surface 112 and the lower end surface 113 are set to be spaced apart from each other due to the two precast panels 110 being spaced apart from each other, and while the lower portions of the precast panels 110 facing each other are not allowed to be continuous, the upper portions of the precast panels 110 are allowed to be continuous due to the precast continuous plate 120 in the hollow portion S on the upper portions of the precast panels 110.

[0096] Therefore, as described above, since the lower portions of the precast panels 110 facing each other are spaced apart from each other rather than continuous and thus it is possible to absorb the longitudinal expansion and contraction of the precast panels 110 , there is an effect that there is no need to install an expansion joint device.

[0097] The prefabricated continuous panel 120 is installed to be inserted into the hollow portion S between the upper end surfaces 112 of the prefabricated panels 110 facing each other. The prefabricated continuous panel 120 prefabricated in the factory is lifted and installed.

[0098] It can be seen that, on the hollow portion S, the continuous steel bars 111 , the shear steel bars 114 and the continuous point portion steel bars 115 are not formed, and a shear groove 121 is formed to accommodate the shear steel bars 114 .

[0099] Therefore, it can be seen that the shear groove 121 is formed through the precast continuous slab 120 such that the shear reinforcement bar 114 is inserted into the shear groove 121 .

[0100] Generally, the shear groove 121 is surface-processed with finishing grout, and thus the precast continuous panel 120 and the precast panel 110 are formed integrally with each other.

[0101] According to the present disclosure, the shear reinforcement 114 is disposed to overlap the shear groove reinforcement 122 exposed to horizontally cross the inside of the shear groove 121, and then, using finishing grouting, the precast continuous panel 120 allows the precast panels 110 to be integrated with each other.

[0102] [Construction method of prefabricated slab bridge 100 using continuous slab according to the present disclosure]

[0103] FIG. 4A to FIG. 4E The steps of constructing a precast slab bridge 100 using a continuous slab 120 made of cast-in-place concrete according to the present disclosure are shown, and FIG. 5A to FIG. 5CThe steps of constructing a continuous point portion of a precast slab bridge 100 using a precast continuous slab 120 according to the present disclosure are shown.

[0104] First, it can be seen that FIG. 4A to FIG. 4E In the construction method of the precast slab bridge 100 using the continuous slab 120 made of cast-in-place concrete according to the present disclosure shown in FIG, first, Figure 4A As shown in FIG. 1 , as the bridge substructure 130 , bridge piers 131 are constructed to be spaced apart from each other in the longitudinal direction between two abutments 132 .

[0105] As the bridge substructure 130, piers 131 and abutments 132 are constructed on the ground using concrete so as to extend upward, such as Figure 4A As shown in . The pier 131 and the abutment 132 are constructed so that a top cover portion is formed on the head portion thereof to support the bottom surface of the end portion of the precast panel 110, and the pier 131 and the abutment 132 are formed in various cross sections using cast-in-place concrete or precast concrete. It can be seen that a bridge support 133 is continuously formed on the upper surface of the pier 131 and the abutment 132 in the transverse direction.

[0106] Then, it can be seen that Figure 4B As shown in FIG. 1 , the precast panels 110 are constructed to be installed between the abutment 132 and the pier 131 , and it can be seen that the precast panels 110 are installed on the continuous point portions A so as to be spaced apart from each other.

[0107] The precast panel 110 is a horizontal panel member made of reinforced concrete, which is formed in advance in a factory so as to have a uniform thickness and a quadrilateral cross section within a range that allows transportation and installation. The horizontal panel member is installed on the upper surface of the pier of the continuous point portion A in the longitudinal direction, and continuous steel bars 111 are horizontally drawn out from the upper end surface 112 to allow the precast panel 110 to be continuous.

[0108] It can be seen that the end surfaces of the precast panel 110 are spaced apart from each other in the longitudinal direction in the upper space of the upper surface of the pier 131 and are divided into an upper end surface 112 and a lower end surface 113, and shear reinforcement 114 is formed on the upper surface of the hollow portion S.

[0109] It can be seen that the template receiving groove 117 is formed in the upper surfaces of the two lower end surfaces 113 facing each other to allow the spacing template 116 to be installed across the upper surfaces of the two lower end surfaces 113 facing each other.

[0110] Then, it can be seen that Figure 4C As shown in FIG. 1 , the spacer formwork 116 is installed so that a continuous plate 120 made of cast-in-place concrete is formed on the formwork receiving groove 117 .

[0111] In this way, the cast-in-place concrete does not leak downward through the space between the two lower end surfaces 113 .

[0112] Then, it can be seen that Figure 4D As shown in FIG. 1 , continuous steel bars 111 horizontally drawn out from an upper end surface 112 are connected to each other by continuous point portion steel bars 115 .

[0113] Therefore, the prefabricated panels 110 spaced apart in the longitudinal direction to face each other may be integrally represented.

[0114] Then, it can be seen that Figure 4E As shown in , the cast-in-place concrete is laid so that the continuous reinforcement 111, the shear reinforcement 114, and the continuous point portion reinforcement 115 formed in the hollow portion S are embedded above the spacing formwork 116, so that while the lower end surfaces 113 of the precast panels 110 facing each other are not allowed to be continuous, the precast panels 110 are allowed to be continuous in the hollow portion S through the continuous plate 120 made of the laid cast-in-place concrete.

[0115] Next, it can be seen that in FIG. 5A to FIG. 5C In the construction method of the prefabricated slab bridge 100 using the prefabricated continuous slab 120 according to the present disclosure shown in FIG, first, as Figure 5A As shown in FIG. 1 , as the bridge substructure 130 , bridge piers 131 are constructed to be spaced apart from each other in the longitudinal direction between two abutments 132 .

[0116] As the bridge substructure 130, as described above, the piers 131 and the abutments 132 are constructed on the ground using concrete so as to extend upward. Figure 5A As shown in . The pier 131 and the abutment 132 are constructed so that a top cover portion is formed on the head portion thereof to support the bottom surface of the end portion of the precast panel 110, and the pier 131 and the abutment 132 are formed in various cross sections using cast-in-place concrete or precast concrete. It can be seen that a bridge support 133 is continuously formed on the upper surface of the pier 131 and the abutment 132 in the transverse direction.

[0117] Then, it can be seen that Figure 5B As shown in FIG. 1 , the precast panels 110 are constructed to be installed between the abutment 132 and the pier 131 , and it can be seen that the precast panels 110 are installed on the continuous point portions A so as to be spaced apart from each other.

[0118] The precast panel 110 is a horizontal panel member made of reinforced concrete, which is formed in advance in a factory so as to have a uniform thickness and a quadrilateral cross section within a range that allows transportation and installation. It can be seen that the horizontal panel member is installed on the upper surface of the pier of the continuous point portion A in the longitudinal direction, and unlike the construction method described above, the continuous reinforcement 111 is not horizontally drawn out.

[0119] It can be seen that, as described above, the end surfaces of the precast panel 110 are spaced apart from each other in the longitudinal direction in the upper space of the upper surface of the pier 131 and are divided into an upper end surface 112 and a lower end surface 113, the shear reinforcement 114 is formed on the upper surface of the hollow portion S, and the template accommodating groove 117 is formed in the upper surfaces of the two lower end surfaces 113 facing each other, but because the precast continuous panel 120 is used, there is no need to install the spacing template 116.

[0120] Then, if Figure 5C As shown in FIG. 1 , the prefabricated continuous panel 120 is installed to be inserted into the hollow portion S between the prefabricated panels 110 facing each other.

[0121] The precast continuous panel 120 is installed to be inserted into the hollow portion S between the upper end surfaces 112 of the precast panels 110 facing each other. The precast continuous panel 120 precast in the factory is lifted and installed. It can be seen that the shear groove 121 is formed to accommodate the shear reinforcement 114.

[0122] Therefore, it can be seen that the shear groove 121 is formed through the precast continuous plate 120 so that the shear reinforcement 114 is inserted into the shear groove 121. The shear reinforcement 114 is arranged to overlap with the shear groove reinforcement 122, which is exposed to horizontally cross the inside of the shear groove 121, and then, using the finishing grouting, the precast continuous plate 120 allows the precast plates 110 to be integrated with each other.

[0123] According to the present disclosure, in a state where the lower portions of the end portions of the precast panel are formed to be spaced apart from each other at the continuous point portions, only the upper portions of the end portions are allowed to be continuous using the continuous panel. In this way, since the precast panels are spaced apart from each other at the continuous point portions, the precast panels are behaved in a form supporting only the two end portions so that the longitudinal expansion and contraction of the precast panels can be absorbed, and since the upper portions of the end portions of the precast panel are allowed to be continuous, there is no need to separately install an expansion joint device, making it possible to solve the problem associated with a bridge defect that may occur due to the separate installation of the expansion joint device.

[0124] Furthermore, only the upper portion of the end surface of the board of a certain length is connected to disperse the cracks occurring on the upper portion of the end surface, so there is no need to install a high-rigidity reinforcing material (connecting steel material) to prevent the phenomenon that cracks are concentrated on the upper portion of the end surface of the continuous point portion because all the end surfaces of the board bridge are integrated with each other. In this way, the durability reduction due to the cracks can be prevented.

[0125] In addition, the continuous slab allows the use of cast-in-place continuous slabs or precast continuous slabs alone. In this way, it is possible to efficiently construct a precast slab bridge using continuous slabs depending on the location.

[0126] The above description of the present disclosure is illustrative only, and those skilled in the art to which the present disclosure relates will understand that the present disclosure may be modified into other specific forms without changing the technical concept or basic features of the present disclosure. Therefore, in all respects, the above embodiments should be understood as illustrative rather than restrictive. For example, each element described as having a single form may be implemented in a distributed manner, and similarly, the elements described as distributed may be implemented in a combined form.

[0127] The scope of the present disclosure is drawn in the following claims rather than the above embodiments, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as belonging to the scope of the present disclosure.

Claims

1. A prefabricated slab bridge using continuous slabs, the prefabricated slab bridge comprising: precast panels (110) installed to be spaced apart from each other in a longitudinal direction and facing each other at successive point portions (A) of a bridge substructure (130); as well as a continuous plate (120) formed such that the upper portion of the prefabricated plate (110) is formed to be continuous in a state where the lower portions of the prefabricated plates (110) are spaced apart from each other, wherein expansion joint devices are not installed at the continuous point portion (A), and the longitudinal expansion and contraction of the precast panel is absorbed by the expansion joints installed at the starting point and the end point of the continuous panel (120), and The continuous plate (120) contacts at least the upper portion of the prefabricated plate (110), The precast panel (110) is a horizontal panel member made of reinforced concrete and having an end surface, and the precast panel (110) comprises: an upper end surface (112) formed by a hollow portion (S) formed by a hollow portion formed downward from an upper surface of an end portion of the prefabricated panel (110); as well as a lower end surface (113), located below the hollow portion (S) and formed as an end surface of the prefabricated panel (110), wherein a continuous plate (120) is installed to be inserted into the hollow portion (S) between the upper end surfaces (112) of the precast panels (110) facing each other so that the precast panels (110) are integrated with each other, and in the continuous plate (120), a shear groove (121) is formed to accommodate a shear reinforcement (114) formed on an upper surface of the upper end surface (112), and The upper end surface (112) and the lower end surface (113) are arranged to be spaced apart from each other due to the precast panels (110) being spaced apart from each other, and while not allowing the lower portion of the precast panel (110) to be continuous, the upper portion of the precast panel (110) is allowed to be continuous due to the continuous plate (120) formed in the hollow portion (S) on the upper portion of the precast panel (110), wherein the shear groove (121) is formed through the continuous plate (120), the shear reinforcement (114) is arranged to overlap with the shear groove reinforcement (122), the shear groove reinforcement (122) is exposed to horizontally cross the inside of the shear groove (121), and then, using finishing grouting, the continuous plate (120) allows the precast panels (110) to be integrated with each other.

2. The precast slab bridge using a continuous slab according to claim 1, wherein the precast slab (110) further comprises: a continuous steel bar (111) horizontally drawn out from the upper end surface (112); the shear steel bar (114) disposed below the continuous steel bar (111) and formed on the upper surface of the hollow portion (S); and continuous point portion steel bars (115) configured to connect the continuous steel bars (111) formed to extend from the upper end surface (112) to each other, and The upper end surface (112) and the lower end surface (113) are arranged to be spaced apart from each other due to the precast panels (110) being spaced apart from each other, and while not allowing the lower portion of the precast panel (110) to be continuous, the upper portion of the precast panel (110) is allowed to be continuous due to the continuous panel (120) made of cast-in-place concrete formed in the hollow portion (S) on the upper portion of the precast panel (110).

3. The prefabricated slab bridge using continuous slabs according to claim 2, wherein: In the prefabricated panel (110), a template receiving groove (117) is further formed in the upper surfaces of the two lower end surfaces (113) facing each other, so that the spacer template (116) is installed to be inserted into the template receiving groove (117), and Since the upper surface of the spacer formwork (116) is arranged at the same height as the upper surfaces of the two lower end surfaces (113), cast-in-place concrete is not laid on the lower portion of the precast panel (110).

4. A method for constructing a prefabricated slab bridge using a continuous slab, the method comprising: (a) as a bridge substructure (130), bridge piers (131) are constructed to be spaced apart from each other in a longitudinal direction between two abutments (132) so as to form a continuous point portion (A); (b) installing the prefabricated panels (110) to be spaced apart from each other on the continuous point portion (A); as well as (c) installing the continuous plate (120) to be inserted into the hollow portion (S) between the prefabricated plates (110) facing each other, wherein the prefabricated panels (110) are installed to be spaced apart from each other and face each other in the longitudinal direction at the continuous point portions (A) of the bridge substructure (130), The continuous plate (120) is formed such that the upper portion of the prefabricated plate (110) is formed to be continuous in a state where the lower portions of the prefabricated plates (110) are spaced apart from each other. Without installing an expansion joint device at the continuous point portion (A), the longitudinal expansion and contraction of the precast panel (110) is absorbed by the lower portion of the precast panel (110) installed to be spaced apart from each other, and The continuous plate (120) contacts at least the upper portion of the prefabricated plate (110), Wherein in the prefabricated panel (110) of step (c): The continuous plate (120) is installed to be inserted into the hollow portion (S) between the upper end surfaces (112) of the precast panels (110) facing each other so that the precast panels (110) are integrated with each other, and in the continuous plate (120), a shear groove (121) is formed to accommodate a shear reinforcement (114) formed on the upper surface; The shear groove (121) is formed through the continuous plate (120), the shear steel bar (114) is arranged to overlap with the shear groove steel bar (122), the shear groove steel bar (122) is exposed to horizontally cross the inside of the shear groove (121), and then, using finishing grouting, the continuous plate (120) and the precast plate (110) are formed into one body with each other; and The upper end surface (112) and the lower end surface (113) of the precast panel (110) are arranged to be spaced apart from each other due to the precast panels (110) being spaced apart from each other, and while the lower portion of the precast panel (110) is not allowed to be continuous, the upper portion of the precast panel (110) is allowed to be continuous due to the continuous panel (120) made of cast-in-place concrete formed in the hollow portion (S) on the upper portion of the precast panel (110).

5. The method for constructing a precast slab bridge using a continuous slab according to claim 4, wherein the precast slab (110) of step (c) is a horizontal slab member formed with an end surface and made of reinforced concrete, and The prefabricated panel (110) comprises: The upper end surface (112) is formed due to the hollow portion (S), and the hollow portion (S) is formed due to the hollow portion being formed downward from the upper surface of the end portion of the prefabricated plate (110); The lower end surface (113) is located below the hollow portion (S) and is formed as an end surface of the prefabricated plate (110); A continuous steel bar (111) is horizontally drawn out from the upper end surface (112); The shear steel bar (114) is disposed below the continuous steel bar (111) and formed on the upper surface of the hollow portion (S); and a continuous point portion steel bar (115) configured to connect the continuous steel bars (111) formed to extend from the upper end surface (112) to each other, wherein a template accommodating groove (117) is formed in the upper surfaces of the two lower end surfaces (113) facing each other, so that a spacing template (116) is installed to be inserted into the template accommodating groove (117), and since the upper surface of the spacing template (116) is arranged at the same height as the upper surfaces of the two lower end surfaces (113), cast-in-place concrete is not laid on the lower portion of the precast panel (110), so that the upper end surface (112) and the lower end surface (113) are arranged to be spaced apart from each other due to the precast panels (110) being spaced apart from each other, and while not allowing the lower portion of the precast panel (110) to be continuous, the upper portion of the precast panel (110) is allowed to be continuous due to the continuous panel (120) made of cast-in-place concrete formed in the hollow portion (S) on the upper portion of the precast panel (110).

6. The method for constructing a prefabricated slab bridge using a continuous slab according to claim 4, wherein: In step (c), bridge supports (133) are continuously formed on the upper surfaces of the piers (131) and abutments (132) in the transverse direction, and the precast panels (110) are installed on the upper surfaces of the piers (131).

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