KR100707136B1 - Construction method of arch-shaped slab bridge using arch-shaped precast panel for building arch-type slab - Google Patents

Abstract

        The present invention is to install the slab in the arch shape using the arched precast panel to generate only the compressive force without generating a tensile force and at the same time install the arch precast panel without using a separate formwork when installing the bridge and cast concrete Arched slab bridge installation method to be integrated with the slab.

Description

 Construction method of arch-shaped slab bridge using arch-shaped slab bridge using arch-shaped precast panel for building arch-type slab}

        Figure 1 (a) (b) (c) is a diagram showing the installation process of the bridge to install the haunting slab using a precast conventional haunch.

        Figure 2 (a) (b) (c) (d) is a view showing the installation process of the bridge to install the haunting slab using the formwork with the haunch conventionally.

        Figure 3 (a) (b) (c) (d) is a view showing the installation process of the arched slab bridge in which the arched slab is installed using the arched precast panel of the present invention.

        4 is a view showing an arched precast panel assembled with the unit arch type precast panel of the present invention.

        5 is a view showing in detail the connection portion of the unit arcuate precast panel of the present invention.

         Figure 6 shows another embodiment of the connection of the unit arcuate precast panel of the present invention.

        7 is a view showing in detail the installation of the arch arch pre-fabricated panel of the present invention by installing the arch-shaped precast panel to the pre-stressing composite beam and placing the arch slab bridge by pouring concrete.

        <Description of the symbols for the main parts of the drawings>

         10 bridge 11 bridge

         12: slab 13: curb

         14: Slab Concrete 15: Precast

         16: compressive force introduction portion 17: haunting portion

         18: preplex composite beam

         20: prestressing composite beam 21: H-beam

         22: abdomen 23: lower casing concrete

         30: bridge 31: dongbari

         32: formwork

         40: arched slab bridge 41: arched slab

         42: mortar of concrete mortar

         50: arch type precast panel 51: arch portion

         52: When 53: When

         54: vertical part 55: reinforcing bar

         56: wire mesh 57: groove

         58: protrusion

         60: unit arch type precast panel

         70: connection portion 71: shear key

         72: penetrating portion 73: steel wire

         74: contact surface 75: semicircular groove

         76: circular through groove

        The present invention installs a plurality of prestressing composite beams to form the width of the bridge on the top of the pier and the shear key and steel wire in the center of the slab by mounting the unit arched precast panel on the upper casing concrete of the prestressing composite beams installed on both sides After installing the arched precast panel that can install the slab in the arch shape by forming the connection part by the concrete, and after forming the casting part in which the concrete mortar is poured between the vertical part of the arched precast panel and the abdomen of the prestressing composite beam It is a method of installing the arched slab bridge in which the arched precast panel and the slab are integrally installed by pouring concrete to form the slab as a whole.

        The unit arcuate precast panel has a vertical portion formed on one side, and installs an arch portion formed by crossing a plurality of protrusions and groove portions at regular intervals from the upper portion of the vertical portion, and has a length corresponding to the intermediate length of the arch portion of the bridge to be installed. The arch portion is provided as much as possible, and on the surface of the end portion of the arch portion, protrusions and grooves or grooves and protrusions are formed respectively to form shear keys for interlocking with each other when the unit arcuate precast panels are connected to each other at the center, and the panel body of the connection portion. Through the wires to form a connection to be connected to each other using a steel wire.

        The present invention is to install the arch precast panel in advance as a substitute for the formwork in order to install the lower part of the slab to be mounted on the site after the concrete is poured to construct the arched slab bridge.

       The composite beam of the present invention refers to a preplex composite beam and all other composite beams which are commonly used as using a synthetic beam in which prestressing is introduced.

        The purpose of the installation of the arched slab bridge as described above is to install the slab in an arch shape, so that it is not necessary to introduce a separate compressive force to the arched precast panel, and to the arch theory (σ = P / A) that the compressive force acts on the arched slab. As the design is possible, the shear surface of the slab is an effective cross-section, which is structurally very stable, and it is simple to install without the need for introducing a separate compressive force. In order to enable the installation of the arch to use the factory-made arched precast panel as a substitute for the form of the slab to be installed in the concrete when the slab is to be installed integrally with the arched precast panel.

       Conventionally, as shown in (a), (b), and (d) of FIG. 1, (a) after installing a plurality of preflex composite beams 18 on the bridge 11 to correspond to the width of the bridge, ( B) After the precast 15 having the haunches 17 is installed on the lower casing concrete 23 of the composite beam 18, (c) to introduce a compressive force into the precast 15. After the concrete is poured while tensioning the precast with a steel wire, when the steel wire is released, a compression force introduction part 16 is installed to allow the compressive force to be introduced into the precast, and the slab concrete 14 is poured into D) forming the slab 12 in which the hunt portion 17 is installed and installing the bridge 10 by installing the necessary facilities for bridges such as curbs 13 thereon,

        In another conventional method, as shown in (a) (b) and (d) of FIG. 2, (a) a plurality of preflex composite beams 18 are installed on the bridge 11 to correspond to the width of the bridge. Afterwards, (b) after installing the formwork 32 having the haunches 17 installed on the lower casing concrete 23 of the composite beam 18 by using the copper club 31, (c) the slab concrete ( 14) after the casting, and (d) to form the slab (12) on which the hunt unit (17) is installed and the necessary facilities for bridges, such as curb (13), to install the bridge.

        1 and 2 of the prior art, so that the slab 12 is installed using the precast 15 having the haunches 17 installed thereon, or the haunches 17 may be installed in the form 32. The slab 12 with the haunch 17 is manufactured and only the concrete placed on the neutral shaft by plate theory (σ = ± M / Z) is effective for the slab 12 with the haunch 17. The concrete placed in the cross section and placed in the lower part of the neutral shaft is not recognized as an effective cross section, and it is by structural calculation to reinforce the rebar to compensate for this and to bear the tensile force in the lower part of the neutral shaft by the rebar, as shown in FIG. Even if the slab 12 is installed using the cast 15, if there is a haunting unit 17, it is necessary to separately go through the step of introducing a compressive force to the precast 15, and as shown in FIG. In order to receive the tensile force of the cross-sectional view of the problem of overdesign to raise the tension bar has been raised.

        The present invention has been proposed in order to improve the above problems, by installing the slab in the arch, so that the compressive force is introduced into the arcuate slab without introducing a separate compressive force to the arcuate precast panel to the effective cross section of the slab effective surface It is structurally very stable and simple to install and economical construction is possible because there is no need for additional tensile rebar.

       Arch type slab which is integrated with slab when slab concrete is poured by using the factory-made arch type precast panel as a substitute for the formwork so that the slab can be installed in a curved arch shape without the haunch part using the arch type precast panel as described above. To provide a bridge installation method.

        The present invention installs a plurality of prestressing composite beams 20 so as to form the width of the bridge on the top of the pier 11 and unit arcuate free on the upper casing concrete 23 of the prestressing composite beams 20 installed on both sides. An arched precast panel 50 through which the slab 12 can be installed in an arch shape by forming the connection portion 70 by the shear key 71 and the steel wire 73 in the center of the slab 12 by passing through the cast panel 60. After installing the slab, the slab part in which concrete mortar is poured is formed between the vertical part 54 of the arcuate precast panel 50 and the abdomen 22 of the prestressing composite beam 20. It is a method of installing the arched slab bridge 40 in which the concrete 14 is cast so as to form 12, and the arcuate precast panel 50 and the slab 12 are integrally installed.

        The unit arcuate precast panel 60 forms a vertical portion 54 on one side and cross-produces a plurality of protrusions 58 and grooves 57 at regular intervals from the upper portion of the vertical portion 54. To install the tooth 51, the arch portion 51 is installed to the length corresponding to the middle length of the arched slab of the bridge to be installed, and the projections 58 and the groove ( 57 or the grooves 57 and the protrusions 58, respectively, to form a shear key 71 to be engaged with each other when the unit arcuate precast panel 60 is connected to each other at the center, and the unit arch type precast panel It is characterized in that the connection portion 70 is formed so as to penetrate the steel wire 73 to the panel 60 body of the portion where the 60 is connected to each other to interconnect with the adjacent panel and the steel wire.

        Hereinafter, the configuration and operation of the present invention by the accompanying drawings in detail as follows.

        Figure 3 (a) (b) (c) (d) is a view showing the installation process of the arched slab bridge in which the arched slab is installed using the arched precast panel of the present invention, (a) is the A plurality of prestressing composite beams 20 are installed to form the width of the bridge on the upper part, and (b) unit arc-shaped precast panels (top) of the lower casing concrete 23 of the prestressing composite beams 20 installed on both sides. 60) to form the connection portion 70 by the shear key 71 and the steel wire 73 in the center of the arched slab to install the arcuate precast panel 50 that can install the slab 12 in the arch after,

(C) The slab (the entirety of the arcuate precast panel 50 and the vertical part 54 and the abdomen 22 of the prestressing composite beam 20) is formed as a whole, The concrete 14 is poured to form 12, and (d) the slab 12 is integrally installed with the arcuate precast panel 50, and the slabs 12 are formed at both ends of both widths of the bridge. It is an arched slab bridge 40 provided with a curb 13.

        In the figure (c), a casting part 42 in which concrete mortar is poured is formed between the vertical part 54 of the arcuate precast panel 50 and the abdomen 22 of the prestressing composite beam 20. The slab 12, which is arched by the slab concrete, which is poured in the future while placing the mortar between the abdomen 22 and the vertical portion 54 while directing the vertical portion 54 to the inner side, that is, the interior of the bridge. The compressive force is automatically introduced into the arch so that only the compressive force can be applied to the arch so that the entire section of the slab becomes an effective cross section, thereby increasing the cross-sectional force and reducing the amount of tensile rebar, while the vertical portion 54 accurately lowers the concrete (23). This is to fix the position so that it is installed above.

       It is also possible to use a method of manufacturing the formwork in an arch form without using an arch precast panel on the upper casing concrete of the prestressing composite beam and then installing the arch slab bridge by installing slab concrete. In this case, the compressive force is also applied to the arch slab. This state is introduced.

        4 is a view showing an arched precast panel in which the unit arch type precast panel of the present invention is assembled, wherein the unit arch type precast panel 60 is interconnected in order to install the arcuate slab 12. The arcuate precast panel 60 is installed in the longitudinal direction of the bridge and is to install the arcuate slab 12 by pouring concrete.

        The unit arcuate precast panel 60 forms a vertical portion 54 on one side, and the protrusions 58 and the groove portion 57 at regular intervals on the upper surface of the extension portion extending from the upper portion of the vertical portion 54 by a predetermined length. ) Install a plurality of cross-sections of the arch portion 51, the arch portion 51 is installed to a length equal to the length of the arch-shaped slab 12 of the bridge to be installed, the surface of the portion where the arch portion 51 ends In order to form a shear key 71 formed with a protrusion 58 and a groove 57 or a groove 57 and a protrusion 58, respectively, the shear key 71 when the unit arcuate precast panel 60 is connected to each other in the center thereof. The protrusions 58 and the grooves 57 of the) are engaged with each other, and the unit arch type precast panel 60 penetrates the steel wire 73 through the panel body of the interconnected portion so as to be adjacent to each other. (60) to interconnect with steel wire (73) It is one to form a connecting portion 70. The

As shown in FIG. 7, the groove 57 and the protrusion 58 formed on the upper surface of the extension part are intimately coupled when the slab is installed by placing the slab concrete 14 so as to be integrally behaved to the external load. In addition to the method of sequentially forming the grooves and protrusions as described above, the reinforcing rods are projected in the form of a deflector and a plurality of shear bolts are installed. Include all shear connectors to improve adhesion to concrete.

        The steel frame forming the unit arch type precast panel 60 is provided with reinforcing bar 55 at the lower end of the vertical part 54, and wire mesh 56 is installed at the vertical part 54 and the arch part 51. Next, it is to make arch type slab by manufacturing and installing in advance as factory production or site production to cast concrete.

        The upper surface of the extension portion extending from the upper portion of the vertical portion 54 of the unit arch type precast panel 60 has a flat surface instead of forming a protrusion 58 and a groove portion 57, while having a flat surface. The reinforcing bar is installed to protrude so that the adhesive force with the slab concrete, which is placed on the upper surface of the unit arch type precast panel, is strengthened in the future.

        5 is a view showing in detail the unit arch-shaped precast panel and the connecting portion of the present invention, which is manufactured to a length corresponding to 1/2 of the slab length of the bridge to be installed, the unit arch-shaped free to form an arch later The cast panel 60 is installed to allow the unit arch type precast panel 60 to be interconnected at the center of the slab of the arch portion of the bridge to install the arcuate slab 12.

The unit arcuate precast panel 60 forms a vertical portion 54 on one side, and the protrusions 58 and the groove portion 57 at regular intervals on the upper surface of the extension portion extending from the upper portion of the vertical portion 54 by a predetermined length. ) Install a plurality of cross-sectioned arch portion 51, but installs the arch portion 51 to the length equal to the length of the arch-shaped slab 12 of the bridge to be installed, the surface of the portion where the arch portion 51 ends In order to form a shear key 71 formed with a protrusion 58 and a groove 57 or a groove 57 and a protrusion 58, respectively, the shear key 71 when the unit arcuate precast panel 60 is connected to each other in the center thereof. The protrusions 58 and the grooves 57 of the () are meshed with each other and the unit arch type precast panel 60 is connected to the panel body of the interconnected portion by a steel wire so that the adjacent interconnected panels are steel wires. Connections that allow interconnection It is the one to form.

* 49 The steel frame forming the unit arch type precast panel 60 is provided with a reinforcing bar 55 at the lower end of the vertical part 54, and a wire mesh 56 at the vertical part 54 and the arch part 51. After installation, it is a factory product that is to be cast or cast concrete, or it is manufactured and installed in advance as a field product to form an arched slab.

     Figure 6 is a view showing another embodiment of the connection portion of the unit arch type precast panel of the present invention, Figure (a) shows a process for interconnecting the unit arch type precast panel, the unit arch type precast panel 60 The contact surface 74 of the unit arch type precast panel 60 provided adjacent to the contact surface 74 of the connection portion 70 of the connecting portion 70 is provided with a contact surface 74 to form a semicircular groove 75 in the center of the flat surface. ) Are connected to each other to form a connection portion 70,

         (B) shows a semicircular groove 75 formed in the contact surface 74 of the unit arch type precast panel 60 by mutually joining the contact surface 74 of the unit arc-shaped precast panel 60 to each other. This interconnection shows the connection part 70 formed with the circular through groove 76 automatically.

        Filling mortar is poured into the circular through groove 76, or a rod of plastic or steel material (not shown) is inserted into the circular through groove 76.

       The connecting portion 70 is to form a circular through groove 76 while the reason for inserting the mortar or rod therein is as follows.

      The first is to ensure the safety as a shear key installed in the connecting portion 70,

      Second, the water contained in the slab concrete 14 cast on the upper surface of the unit arc-shaped precast panel 60 by filling mortar or inserting a rod into the circular through groove 76 is formed in the circular shape of the connection part 70. It is to serve to maintain the moisture in the concrete so that it does not leak to the outside of the connecting portion by the mortar or rod placed in the through groove (76) so that the concrete can be properly hydrated with water,

       Third, when the unit arch type precast panel 60 is assembled and connected to each other to form an arcuate slab bridge 40, a load is applied to the bridge 40 so that rotational force is generated at alternate points on both sides of the connection part 70. A rotational force is applied to the connecting portion 70 by mortar hardened or inserted into the circular through groove 76 formed in the to remove the moment generated in the point portion to prevent the bridge from being destroyed by the bending moment To give a role.

         Lubricate the circular through groove 76 so that the rotational force acts in the connecting portion 70 as described above, and then apply lubricating oil to prevent water from flowing from the upper surface, and then pour the mortar to harden the mortar. Or insert a rod.

         In addition, the connection part 70 is to be kept in close contact with each other as shown in Figure 7 concrete mortar between the vertical portion 54 of the unit arch type precast panel 60 installed between the abdomen 22 ( 42) to cast the unit arcuate precast panel 60 inwards to the inside so that the connection portion 70 is in close contact with the water of the concrete poured on the upper surface (53) connection portion 70 At the same time to prevent the loss through the connection portion 70 to the hinge area to prevent the bridge from being destroyed by the bending moment.

         7 is a view showing in detail the installation of the arch arch pre-fabricated panel of the present invention by installing the arch-shaped precast panel in the pre-stressing composite beam and placing the arch-type slab bridge by pouring concrete, the bridge installed by the installation process of FIG. Shows the whole.

        A plurality of prestressing composite beams 20 are provided on the top of the bridge 11 to form the width of the bridge, and the unit arcuate precast panel is provided on the upper casing concrete 23 of the prestressing composite beams 20 provided on both sides. Arching precast panel that can install the slab 12 in an arch shape by mounting the respective 60 so that the arch 51 in the center of the slab to form a connecting portion 70 by the shear key 71 and the steel wire 73. After installing 50, a casting part 42 in which concrete mortar is poured is formed between the vertical part 54 of the arcuate precast panel 50 and the abdomen 22 of the prestressing composite beam 20. Later, concrete is formed so that the slab can be formed as a whole, the slab is integrally installed with the arcuate precast panel 50, and the slab 12 has an arch shape in which the curbstones 13 are installed at the ends of both widths of the bridge. Slab It is 40.

          Forming a casting part 42 in which concrete mortar is poured between the vertical part 54 of the arcuate precast panel 50 and the abdomen 22 of the prestressing composite beam 20 is perpendicular to the abdomen. While placing the mortar between the parts, the vertical part is directed to the inside, that is, the interior of the bridge, and the compressive force is automatically introduced into the arch by the slab concrete, which is poured in the future, and the slab 12 formed integrally with the arch part also has the compressive force. This is to ensure that the vertical portion 54 is accurately installed on the lower casing concrete 23 while allowing only the compressive force to be applied to the entire slab including the arch portion to be automatically introduced.

           The present invention has been proposed to improve the above problems, an arcuate slab in which the panel and the slab are integrally installed so that the compression force is introduced by installing an arcuate arched precast panel and casting slab concrete thereon. As the shear surface of the arched slab does not need to introduce a separate compressive force to the arcuate precast panel, the compressive force acts, so the cross section of the slab is effective and the structure is very stable and simple to install while reducing the amount of tensile rebar. It is economical to be integrated with the slab when slab concrete is laid while using the factory-made arched precast panel as a substitute for the formwork so that the slab can be installed in a curved arch form without a haunch part using an arched precast panel. Easy to construct Tooth slab will bridge the installation.

Claims (12)

        A plurality of prestressing composite beams are installed to form the width of the bridge on the upper part of the pier, and a unit arch-shaped precast panel is mounted on the lower casing concrete of the prestressing composite beams installed on both sides by a shear key and steel wire at the center of the slab. An arched precast panel connected by a connecting part is installed, and a concrete mortar casting part is formed between the arched precast panel and the prestressing composite beam, and the concrete is poured to form a slab as a whole so that the arched precast panel and the slab are integrated. An arched slab bridge with an arched slab installed using an arched precast panel, which is characterized in that the slab is formed in an arched shape.         The method of claim 1,         The unit arc-shaped precast panel has a vertical portion formed on one side, and on the upper surface of the extended portion extending a certain length from the upper portion of the vertical portion at regular intervals, a plurality of arch portions formed by cross-protruding portions and grooves are installed, The arch part is provided in bisecting lengths of the arcuate slabs, and the front end of the arch part is formed with a shear key formed with a projection part and a groove part or a groove part and a projection part respectively, and the steel wire is formed on the panel body of the part where the unit arch type precast panel is interconnected. Arched slab bridge with arched slab installed using arched precast panel which is characterized by penetrating through.         The method of claim 1,         The concrete mortar casting part is to cast concrete mortar between the vertical part of the arch-shaped precast panel installed on the upper casing concrete of the prestressing composite beam and the abdomen of the prestressing composite beam, to introduce a compressive force to the arcuate slab. Arched slab bridge with arched slab installed using arched precast panel.         The method of claim 1,         The connecting portion is an arched slab bridge provided with an arched slab using an arched precast panel characterized in that the connection by the shear key and the steel wire is made.         The method of claim 2,         An arched slab bridge provided with an arched slab by using an arched precast panel characterized in that the upper surface of the unit arched precast panel is installed so as to project the reinforcing bar in the "c" shape.         The method according to claim 1 or 4,         The shear key is formed in the connecting portion of the arcuate precast panel that is mutually connected from the left and right, so that the projection and the groove or the groove and the projection is formed in the left and right cross-section respectively so that the projection and the groove of the shear key are connected to each other when connected to each other. An arched slab bridge with an arched slab installed using an arched precast panel characterized by one thing.         The method of claim 1,         Wherein the connecting portion flatten the contact surface of the unit arch type precast panel, the semi-circular groove is formed in the center of the contact surface so that the contact surface of the unit arch type precast panel is connected to each other to form a circular through groove Arched slab bridge with arched slab using arched precast panel.         The method of claim 7, wherein An arched slab bridge provided with an arched slab using an arched precast panel characterized in that the mortar is filled or inserted into the circular through groove.         The method of claim 1,         The unit arch type precast panel is installed with the reinforcing bar at the bottom of the vertical part, the wire mesh is installed on the vertical part and the arch part, and then the arch slab is installed using the arch type precast panel characterized in that the concrete is cast One arched slab bridge.        The method of claim 1,        Instead of using an arched precast panel on the upper casing concrete of the prestressing composite beam, the arch is manufactured by installing the formwork in an arch form and installing an arched slab using an arched precast panel characterized by pouring slab concrete. Slab bridge.         Install a plurality of prestressing composite beams to form the width of the bridge on top of the bridge,        Install an arched precast panel to install slabs in an arch shape by mounting unit arch type precast panels on top of the lower casing concrete of the prestressing composite beams installed on both sides to form a connection part by a shear key and steel wire at the center of the arch portion. after,        A casting part in which concrete mortar is poured is formed between the vertical part of the arcuate precast panel and the abdomen of the prestressing composite beam,        Placing slab concrete so that the slab can be formed as a whole, the slab is integrated with the arched precast panel so that the arched slab is formed.        An arched slab bridge construction method using the arched slab by using an arched precast panel characterized in that the upper portion of the slab is an arched slab bridge that is installed curb at the end of both widths of the bridge. delete

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