KR101101204B1 - Cantilever of slab for steel box bridge using steel supporter and the method thereof - Google Patents

Cantilever of slab for steel box bridge using steel supporter and the method thereof Download PDF

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Publication number
KR101101204B1
KR101101204B1 KR1020110053669A KR20110053669A KR101101204B1 KR 101101204 B1 KR101101204 B1 KR 101101204B1 KR 1020110053669 A KR1020110053669 A KR 1020110053669A KR 20110053669 A KR20110053669 A KR 20110053669A KR 101101204 B1 KR101101204 B1 KR 101101204B1
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KR
South Korea
Prior art keywords
steel
plate
steel box
cantilever
permanent
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KR1020110053669A
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Korean (ko)
Inventor
조규대
문근선
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(주) 효성
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Priority to KR1020110053669A priority Critical patent/KR101101204B1/en
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00Methods or apparatus specially adapted for erecting or assembling bridges
    • E01D21/10Cantilevered erection
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00Structural or constructional details of bridges
    • E01D19/12Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
    • E01D19/125Grating or flooring for bridges

Abstract

PURPOSE: A cantilever of a steel box bridge slab using permanent steel pedestals and a construction method thereof are provided to prevent accidents caused by high-place work and to enable quick and smooth construction of a cantilever. CONSTITUTION: A cantilever of a steel box bridge slab comprises a plurality of permanent steel pedestals(200), joists(300), a working passage(400), and a precast deck(500). The permanent steel pedestals, one side of which is coupled to the side of a steel box girder(10), protrude from the side of the steel box girder and arranged at regular intervals in the longitudinal direction of the steel box girder. The joists are fixed to the other side of the permanent steel pedestals and connect the permanent steel pedestals in the longitudinal direction of the steel box girder. The working passage is coupled to the other end of the permanent steel pedestals and protrudes from the side of the permanent steel pedestals, thereby allowing the passage of a worker in construction of a cantilever. The precast deck is installed to be placed on the permanent steel pedestals and the joist and allows the placement of concrete on a cantilever.

Description

Cantilever of slab for steel box bridge using steel supporter and the method according to steel box bridge slab

The present invention relates to a cantilever portion of a steel box bridge slab using a steel permanent support, and a construction method thereof. The steel permanent support is assembled to a side of a steel box girder, and used as a permanent structure without dismantling. The present invention relates to a cantilever portion of a steel box bridge slab using a steel permanent support to support a load caused by a heavy slab and slab casting, and a construction method thereof.

Conventional general bridge construction first completes a bridge substructure, such as an alternating or pier, and installs a girder in the longitudinal direction (lengthwise) above the alternating and / or pier, and a plurality of ridges on the girder. After the installation, the bridge slab formwork is installed on the installed club.

Next, reinforcing the reinforcing bars in the longitudinal and lateral directions inside the bridge slab formwork to complete the final bridge slab by placing the slab concrete in the field. Since it takes place at the top of bridges and shifts that can reach several tens of meters, it is necessary to take the height of the work, so much care is required for safety management. Above all, workability due to the installation and dismantling of bridge slabs and bridge slab formwork Due to the extremely low construction rate and the delay of air (construction period) is inevitable in the construction of bridge slab, there was a problem that there are many inefficient aspects in terms of construction cost.

In order to solve the problems of the cast-in-place concrete as described above, in the internal space between the girder and the girder, the precast plate was installed and the cast was installed on-site, but the outer cantilever part was formed to protrude outward from the outermost girder. It is impossible to construct cantilever sections by precast method, so it is necessary to construct them with cast-in-place concrete as above.

However, manufacturing the outer cantilever part by the cast-in-place concrete requires a complicated construction process as compared to using a precast member, and there is a problem in that the construction period is long. In addition, the copper bar and formwork should be installed at the height of the place, and the risk of accidents such as falling of workers and falling objects due to the installation of copper bar and formwork at the height is not only increased, but additional costs, air delays, and construction waste are generated. This also causes problems.

An object of the present invention for solving the above problems, by simply installing a steel permanent support on the side of the steel box girders and by installing a precast bottom plate thereon to allow the slab concrete to be poured, after concrete pouring There is no need to dismantle, thus reducing the risk of safety accidents and the cost of construction work due to the installation of formwork, and the construction speed can be shortened and construction period can be shortened. Cantilevered part of steel box bridge using steel permanent pedestal and its construction method that can be restrained and provide a space where worker can avoid or move when placing slab concrete by forming work path In providing.

The present invention to achieve the object as described above and to solve the conventional drawbacks, in the cantilever portion of the both ends of the bridge slab formed on the steel box girder, the outermost of the steel box girder One side end is coupled to the side protruding to the side of the steel box girders and a plurality of steel permanent support is installed at a predetermined interval along the longitudinal direction of the steel box girders; Jang Sun-jae, which is installed to be fixed to the other end of the steel permanent support to connect a plurality of steel permanent support in the longitudinal direction of the steel box girder; A working passage coupled to the other end of the steel permanent support and installed to protrude toward the side of the steel permanent support so that the worker can move when constructing the cantilever part; A precast bottom plate installed to be placed on the steel permanent supporters and the joist wire to allow the concrete of the cantilever portion to be poured; And a control unit.

In addition, the steel permanent support, is formed of a cantilever type truss structure, the other side end upper portion of the wire rod mounting groove for inserting and fixing the wire rod; characterized in that the further formed.

In addition, the steel permanent support, characterized in that it comprises a fixing plate which is installed on the upper end of one side to be coupled to the upper flange of the steel box girder through the fastening member.

In addition, the steel permanent support, the cantilever-shaped box structure is formed, the other end of the wire rod mounting groove to allow the wire rod is inserted and fixed; is further formed.

In addition, the precast bottom plate, the horizontal bottom plate to be placed on the steel permanent support and the joist wire to enable slab concrete pouring; A vertical bottom plate formed perpendicularly to one end of the horizontal bottom plate to prevent slab concrete from flowing down; A plurality of reinforcing bars and reinforcing bars embedded in the horizontal bottom plate and the vertical bottom plate and arranged to be orthogonal to each other at predetermined intervals in a length direction and a width direction thereof; And a plurality of truss frames which are partially embedded while being disposed in parallel along the longitudinal direction between the main roots and the other part protruding to an upper surface of the horizontal bottom plate.

On the other hand, the present invention in the construction method of the cantilever portion, which is both ends of the steel box-type bridge slab formed on the steel box girder, one side end is coupled to the side of the steel box girder installed on the outermost of the steel box girder A first step of installing the steel permanent support projecting to the side of the steel box girders at regular intervals along the longitudinal direction of the steel box girder; A second step of connecting the other ends of the permanent steel pedestals installed at regular intervals using a long wire; A third step of installing a work path on the other end of the steel permanent support base to allow the worker to move during construction of the cantilever unit; A fourth step of lifting the steel box girders provided with the steel permanent support, the working passage and the joist, and installing the steel box girders on the upper part of the bridge lower structure; A horizontal bottom plate placed on the steel permanent supporters and the joist wire, a vertical bottom plate vertically formed at one end of the horizontal bottom plate to prevent slab concrete from flowing down, and an interior of the horizontal bottom plate and the vertical bottom plate And a plurality of the main and reinforcing bars which are embedded in the longitudinal direction and the width of the reinforcing bars at right intervals in the longitudinal direction and the width direction, and a part is embedded while being parallelly disposed along the longitudinal direction between the main roots and the other part horizontally A fifth step of installing a precast bottom plate formed of a plurality of truss skeletons protruding to an upper surface of the bottom plate; Characterized in that it comprises a; sixth step of hardening by reinforcing the reinforcing bar on top of the precast bottom plate and pouring slab concrete.

In addition, the steel permanent support is characterized in that the coupling is fixed through the fastening member to the upper flange protruding to the outside of the web of the steel box girder.

As described above, according to the present invention, by using the steel permanent stand installed on the side of the steel box girders as a permanent structure, after the construction of the cantilever part through the installation of the precast bottom plate and the pouring of slab concrete, the dismantling of the formwork or copper bar It does not require work, thus preventing safety accidents due to high-altitude work, improving construction speed, reducing air and reducing construction costs, restraining the occurrence of construction waste materials such as formwork, and installing work passages on steel permanent supports. It is a very useful invention that can be easily moved by the operator is easy to install the precast deck and slab concrete construction.

1 is a perspective view showing a cantilever portion of a bridge slab according to the present invention;
2 is a cross-sectional view showing a cantilever portion of a bridge slab according to the present invention;
3 is a front view showing a steel permanent support of the truss structure according to the present invention,
4 is a plan view showing a steel permanent support of the truss structure according to the present invention,
Figure 5 is a plan view showing a state in which the steel permanent support and the long wire rod of the truss structure in the steel box girder according to the present invention,
Figure 6 is a plan view showing a state in which the steel permanent girders and long wires and work passages of the truss structure is installed in the steel box girder according to the present invention,
7 is a front view showing a state in which a steel permanent girders, a long wire rod and a working passage of a truss structure are installed in a steel box girder according to the present invention;
8 is a perspective view showing a steel permanent stand of the steel box structure according to the present invention,
9 is a longitudinal sectional view showing a precast deck according to the present invention;
10 is a cross-sectional view showing a precast deck according to the present invention;
11 is an exemplary view showing a cantilever portion construction state using the steel permanent support of the truss structure according to the present invention,
12 is an exemplary view showing a cantilever portion construction state using the steel permanent support of the steel box structure according to the present invention,

Hereinafter, the configuration and the operation of the embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a 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.

1 is a perspective view showing the cantilever portion of the bridge slab according to the present invention, Figure 2 is a cross-sectional view showing the cantilever portion of the bridge slab according to the present invention, Figure 3 is a front view showing a steel permanent support according to the invention, Figure 4 5 is a plan view showing the permanent steel support according to the present invention, FIG. 5 is a plan view showing the steel permanent support and the joist installed on the steel box girder according to the present invention, and FIG. 6 is the steel permanent support and the joist material on the steel box girder according to the present invention. 7 is a plan view showing a state in which a work passage is installed, and FIG. 7 is a front view showing a state in which steel permanent support, a long wire and a work passage are installed in a steel box girder according to the present invention.

As shown in the figure, the present invention relates to a cantilever portion 100 formed at both ends of the bridge slab which is constructed on the upper portion of the steel box girder 10 in constructing the bridge.

The cantilever part 100 is coupled to one side end of the steel box girder to protrude toward the side of the steel box girder 10 and a plurality of steels installed at predetermined intervals along the longitudinal direction of the steel box girder 10. Permanent pedestal 200, and the steel wire is installed to be fixed to the other side of the permanent pedestal (200) is a wire wire 300 to connect the plurality of steel permanent pedestal 200 in the longitudinal direction of the steel box girder 10, and the steel It is coupled to the other end of the permanent pedestal 200 and installed to protrude toward the side of the steel permanent pedestal 200, the working passage 400 to move the worker during construction of the cantilever unit 100, and the steel permanent pedestal 200 ) And a precast bottom plate 500 which is installed to be placed on the joist wire 300 to allow the concrete of the cantilever part 100 to be poured.

The steel box girder 10 includes an upper flange 12 and a lower flange 13, and a pair of webs 11 connecting the upper flange 12 and the lower flange 13 to each other.

The steel box girder 10 is made in advance in a factory in the form of a cross-section of a variety of boxes, such as rectangular or trapezoidal shape.

Meanwhile, the steel permanent support 200 has a cantilever type truss structure, and includes an upper chord 210 and a lower chord 220 installed to be spaced apart in the height direction, and the upper chord 210 and the lower chord 220. ) And a vertical member 230 for vertically connecting the upper member 210, and a specimen 240 for connecting the upper chord 210 and the lower chord 220 in an oblique direction.

The steel permanent support 200 is in contact with the lower end of the upper flange 12 of the steel box girder 10 through the first fixing plate 260 is installed on one side of the fastening member 600 such as bolts or rivets It is fixed through), and the side portion is fixed to the side of the steel box girder 10 by being supported in contact with the web (11).

The first fixing plate 260 is installed on the upper chord 210 constituting the steel permanent pedestal 200 is positioned above the steel permanent pedestal 200.

In addition, a second fixing plate 270 is installed on the other side of the steel permanent support 200 so that the working passage 400 can be coupled through the fastening member 600.

The second fixing plate 270 installed on the other side of the steel permanent support 200 is attached to the vertical member 230 so that the working passage 400 can be installed on the side of the steel permanent support 200.

A plurality of fastening holes 261 are formed in the first and second fixing plates 260 and 270 installed in the steel permanent support 200 to allow the fastening member 600 to be installed, and the steel box girder 10 At one side end of the upper flange 12), a fastening hole corresponding to the fastening hole 261 is formed to allow the fastening member 600 to be installed.

Steel permanent pedestal 200 of the present invention configured as described above is coupled to the lower side of the upper flange 12 through the first fixing plate 260, even if the side is supported by the web 11, sag, sag It is fixed stably without any warpage.

On the other hand, the other end of the steel permanent support 200 is further formed with a long wire mounting groove 250 to be inserted and fixed to the wire material 300, the wire material 300 is stably on the steel permanent support 200 To be fixed.

The steel permanent stand 200 configured as described above withstands the weight of the slab concrete 700 that is placed on top of the precast bottom plate 500 and the precast bottom plate 500 installed during the construction of the cantilever unit 100. As a permanent structure that can be installed, it can be made in advance before assembling the steel box girder 10 and coupled to the steel box girder 10 can be a quick construction of the cantilever unit 100, and is used as a permanent structure As in the prior art, when the concrete is poured for the construction of the cantilever unit 100, there is no need to install or dismantle the formwork and the copper bar, and safety and construction are very excellent.

That is, before installing the steel box girders 10 to the pier 20, after installing the steel permanent support 200 and the joist 300 and the working passage 400 on the side of the steel box girders 10 from the ground By lifting the box girders 10 to the top of the piers 20 and constructing them, the steel box girders 10 are installed on the piers 20 which are constructed very high as in the prior art, and then to the side of the steel box girders 10. Compared to the case of constructing the cantilever unit 100, there is no need for aerial work, thereby preventing safety accidents and simply assembling the steel permanent support 200, which is prefabricated, to the steel box girder 10, and thus has excellent workability.

On the other hand, the Jangjae 300 may be composed of steel or precast concrete products, it is installed to be inserted into the Jangjae rod installation grooves 250 to connect the precast permanent pedestal 200, the precast bottom plate placed on the top It stably supports the 500.

Meanwhile, the work path 400 is fixed to the second fixing plate 270 installed on the vertical member 230 of the other end of the steel permanent support 200, and the lower support 410 protrudes to the other side of the steel permanent support 200. And a handrail 420 vertically installed on one side of the lower support 410, and a handrail 430 installed to connect the handrail support 420 to prevent a worker from falling, and the lower support 410. It is configured to include a walking board 440 is installed to connect the) to enable the movement of the worker.

The work passage 400 allows the construction of the precast floor plate 500 to facilitate the construction of the worker by allowing the movement of the worker during the construction of the concrete or slab formation.

8 is a perspective view showing a steel permanent support of the steel box structure according to the present invention, the steel permanent support 200 of the present invention can be manufactured in a steel box structure as shown.

The steel permanent stand 200 of the steel box structure is formed horizontally and the top plate portion 281 of the rectangular shape in which the precast bottom plate 500 is placed, and a plurality of side plates formed vertically at the edge of the top plate portion 281 The lower part 283 is formed to connect the lower part of the side 282 and the side plate part 282, and is formed to be inclined upwardly from one side end to the other end.

A fastening hole 261 is formed at one side of the upper plate to be coupled to the upper flange 12 of the steel box girder 10 through the fastening member 600, and the joist wire can be inserted and fixed to the other side of the upper plate. The joist wire installation groove is further formed.

In addition, the side plate portion 282 is formed with a fastening hole 261 so that the working passage 400 can be installed through the fastening member 261.

As described above, the steel permanent support 200 of the present invention may be manufactured in various forms such as a truss structure or a steel box structure and installed on the side of the steel box girder 10.

9 is a longitudinal sectional view showing a precast bottom plate according to the present invention, Figure 10 is a cross-sectional view showing a precast bottom plate according to the present invention, the precast bottom plate 500 is a steel permanent support (200) The horizontal bottom plate 510 installed to be placed on the 300 and the vertical bottom plate 520 formed perpendicular to one end of the horizontal bottom plate 510 to prevent the concrete from flowing down when the slab concrete 700 is poured. And a plurality of main bars 530 and the reinforcing bars 540 embedded in the precast bottom plate and arranged to be orthogonal to each other at predetermined intervals in the longitudinal and width directions thereof, and between the main bars 530. A portion is embedded while being disposed parallel to the longitudinal direction, and the other portion includes a plurality of truss skeletons 550 protruding to the upper surface of the horizontal bottom plate 510.

The truss frame 550 is a pair of the lower root 551 and the pair of lower roots 551 are arranged while maintaining a predetermined interval on both sides with respect to the main root 530 is arranged in the center, Spaced at a predetermined height in the upper center is made of a lattice bar 552 exposed to the outside of the upper surface along the longitudinal direction of the vertical bottom plate 520, the pair of lower roots 551 and lattice bar 552 The pair of lower roots 551 and the lattice bar 552 are formed to form an integrated truss structure by welding the reinforcement 553 continuously bent repeatedly on both inclined surfaces of the triangular structure formed by the < RTI ID = 0.0 >

The truss frame height of the precast deck 500, ie the location of the lattice bar 552 is formed to fit the assembly height in consideration of the position of the upper or lower assembly reinforcing bars (not shown) to be reinforced thereon for slab curing. do.

The process of constructing the cantilever portion 100 of the bridge slab using the steel permanent support 200 of the present invention configured as described above with reference to FIGS. 11 and 12, first, the steel box girder 10 and the steel permanent The pedestal 200 is pre-fabricated on the ground, and the pre-fabricated steel permanent support 200 is coupled to the side of the steel box girder 10 at regular intervals.

In this case, when the steel permanent support 200 is a truss structure, the first fixing plate 260 is coupled to the lower surface of the upper flange 12 of the steel box girder 10 through the fastening member 600, and one side thereof is a steel box. By being in contact with the web 11 of the girder 10 is fixed stably to the side of the steel box girder 10.

As such, the steel permanent stand 200 is installed on the side of the steel box girder 10 on the ground, so that the height of the work is not necessary, the steel permanent stand 200 is easy to install, and the safety during construction is very excellent.

In addition, even if the steel permanent support 200 is installed so as to be coupled only to the upper flange 12 of the steel box girder 10, one side is supported on the web 11 of the steel box girder 10 to be stably fixed, the steel box By reducing the coupling portion with the girder 10, the construction can be made easily and quickly.

Meanwhile, when the steel permanent support 200 has a steel box structure, the upper plate portion 281 is attached to the upper flange 12 of the steel box girder 10 as shown in FIG. 12 and the steel is fastened using the fastening member 600. Fix the steel permanent stand 200 of the box structure.

On the other hand, when the steel permanent support 200 is installed on one side of the steel box girder 10 at regular intervals, a plurality of precast permanent support spaced apart at regular intervals by inserting the Jang wire 300 in the Jang wire installation groove 250 Connect (200).

The long wire 300 is to support the precast bottom plate 500 by connecting the steel permanent pedestal 200 spaced at a predetermined interval to support the precast bottom plate 500 stably.

When the joists 300 are installed in this way, the working passage 400 is installed in the longitudinal direction of the steel box girder 10 so as to be coupled to the second fixing plate 270 or the side plate 282 of the steel permanent support 200.

The work passage 400 connects the lower support 410 to the second fixing plate 270 or the side plate 282 using the fastening member 600, and the handrail holder 420 at the end of the lower support 410. The installation is completed by installing a plurality of handrails 430 in the height direction of the railing column 420, and installing a walking plate 440 to be placed on the lower base 410.

As described above, when the steel permanent support 200 and the long wire 300 and the working passage 400 is installed on the side of the steel box girder 10, the steel box girder 10 is lifted and installed on the top of the piers 20. do.

In this case, the steel box girder 10 is installed to be located at the outermost side of the steel box girder 10 installed on the upper portion of the piers 20 to allow construction of the cantilever unit 100.

As such, when the installation of the steel box girder 10 is completed, the precast bottom plate 500 is installed to support both ends of the neighboring steel permanent support 200.

After the construction is completed by reinforcing the reinforcing bar on top of the precast floor plate 500 and the slab concrete 700 by pouring.

Here, when the precast deck 500 is installed and the slab concrete 700 is placed, the worker moves on the work path 400 or provides a space for the worker to be safe and smooth construction is made.

On the other hand, when installing the precast bottom plate 500 on the steel permanent support 200, by applying an adhesive mortar with a suitable thickness to the contact surface of the precast bottom plate 500 and the steel permanent support 200 to mutually By allowing it to be fixed, the precast bottom plate 500 can be stably installed without slipping.

On the other hand, the work path 400 is to be reused by separating the slab concrete 700 on the precast permanent support 200 after pouring.

The present invention constructed through the above process is to lift the styraks girder 10 in the state of pre-assembled steel permanent support 200 and the long wire 300 in the steel box girder 10 on the ground piers 20 By installing on the upper part of the construction is made easy and fast, to prevent safety accidents.

In addition, since the worker can be damaged to the work passage 400 when the slab concrete 700 is placed, the cantilever construction can be more quickly and smoothly installed.

In addition, the present invention is easy to assemble by installing a steel permanent support 200, a wire wire 300, a working passage 400 blocked in the steel box girders 10 to be installed cantilever unit 100, piers ( When lifting to the upper portion of 20), because it does not include the precast bottom plate 500 and the slab concrete 700, its weight is very light, and this makes the construction easier because the handle is easy when installing the piers.

In addition, since the steel permanent support 200 is a permanent structure, it does not need to be dismantled separately, thereby preventing a safety accident due to the dismantling operation.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

(100): cantilever part 200: steel permanent support
(210): Upper Present (220) Lower Present
230: vertical (240): municipal
(250): Jangsunjae installation groove (260): 1st fixed plate
(261): fastening hole (270): second fixing plate
(280): Top plate 281: Side plate
(282): bottom plate
(300): Jang Sunjae (400): Work Path
(410): lower support 420: handrail
430: handrail 440: walking board
500: precast bottom plate 510: horizontal bottom plate
(520): vertical bottom plate 530: the main root
(540): reinforcing bars (550): truss frame
(551): Lower Root (552): Lattice Bar
(553): Kang Hyun (600): Fastening member
(700): Slab Concrete (10): Steel Box Girder
(11): web 12: upper flange
(13): Lower Flange (20): Pier

Claims (7)

  1. In the cantilever part which is the both ends of the bridge slab formed in the upper part of the steel box girder,
    One end is coupled to the side of the steel box girders to be installed on the outermost side protruding to the side of the steel box girders and a plurality of steel permanent support is installed at predetermined intervals along the longitudinal direction of the steel box girders;
    Jang Sun-jae, which is installed to be fixed to the other end of the steel permanent support to connect a plurality of steel permanent support in the longitudinal direction of the steel box girder;
    A work path coupled to the other end of the steel permanent support and installed to protrude toward the side of the steel permanent support to provide a space where a worker can move or be damaged during construction of the cantilever portion;
    A horizontal bottom plate which is installed to be placed on the steel permanent supporters and the joist, to allow the concrete of the cantilever part to be placed, and is placed on the steel permanent supporters and the joist, to allow slab concrete to be poured, and the horizontal bottom plate A plurality of vertical bottom plate is formed perpendicular to one end of the slab to prevent the slab concrete from flowing down, buried in the horizontal bottom plate and the vertical bottom plate and orthogonally disposed at predetermined intervals in the longitudinal and width directions thereof. A precast bottom plate composed of a plurality of truss frames which are partially embedded with the main bar and the reinforcing bar in parallel with the main bar along a longitudinal direction thereof, and the other part protrudes into an upper surface of the horizontal floor plate; Cantilever portion of the steel box bridge slab using a steel permanent pedestal, characterized in that comprising a.
  2. The method of claim 1,
    The steel permanent support is formed of a cantilever type truss structure, and the other end of the steel wire bridge is the cantilever portion of the steel box bridge slab using a permanent support; .
  3. The method of claim 2,
    The steel permanent stand,
    Cantilever portion of the steel box bridge slab using a steel permanent pedestal, characterized in that it comprises a fixing plate installed on the upper end of one side to be coupled to the upper flange of the steel box girder through a fastening member.
  4. The method of claim 1,
    The steel permanent support is formed, a cantilevered box structure, the other end of the steel wire bridge over the steel box bridge slab using the steel permanent bridge, characterized in that the wire rod installation groove for inserting and fixing the long wire.
  5. delete
  6. In the construction method of the cantilever portion which is both ends of the steel box-type bridge slab formed on the steel box girder,
    A first step of installing one end of the steel box girder protruding to the side of the steel box girder at a predetermined interval along the longitudinal direction of the steel box girder by coupling one end to a side of the steel box girder installed at the outermost side of the steel box girder;
    A second step of connecting the other ends of the permanent steel pedestals installed at regular intervals using a long wire;
    A third step of installing a work path on the other end of the steel permanent support base to allow the worker to move during construction of the cantilever unit;
    A fourth step of lifting the steel box girders provided with the steel permanent support, the working passage and the joist, and installing the steel box girders on the upper part of the bridge lower structure;
    A horizontal bottom plate placed on the steel permanent supporters and the joist wire, a vertical bottom plate vertically formed at one end of the horizontal bottom plate to prevent slab concrete from flowing down, and an interior of the horizontal bottom plate and the vertical bottom plate And a plurality of the main and reinforcing bars which are embedded in the longitudinal direction and the width of the reinforcing bars at right intervals in the longitudinal direction and the width direction, and a part is embedded while being parallelly disposed along the longitudinal direction between the main roots and the other part horizontally A fifth step of installing a precast bottom plate formed of a plurality of truss skeletons protruding to an upper surface of the bottom plate;
    Method of constructing the cantilever portion of the steel box bridge slab using a steel permanent support, characterized in that it comprises a; a sixth step of reinforcing the reinforcing bar on the top of the precast deck and the slab concrete to harden.
  7. The method according to claim 6,
    The steel permanent support is a method of constructing the cantilever portion of the steel box bridge slab using the steel permanent support, characterized in that is fixed to the upper flange protruding outside the web of the steel box girder through a fastening member.


KR1020110053669A 2011-06-03 2011-06-03 Cantilever of slab for steel box bridge using steel supporter and the method thereof KR101101204B1 (en)

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Cited By (7)

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CN104195952A (en) * 2014-08-20 2014-12-10 中铁四局集团第二工程有限公司 Steel box girder erection method applied to steel and concrete hybrid girder cable-stayed bridge
KR101796210B1 (en) * 2016-12-14 2017-11-09 이성원 Bracket for cantilever and cantilever construction method using the bracket
KR20180122075A (en) * 2017-05-02 2018-11-12 이성원 Cantilever bridge with t-type fixinf support bracket
KR20190014813A (en) * 2017-08-04 2019-02-13 한국도로공사 Construction method for cantilever in steel composite girder bridge
KR20200061327A (en) 2020-05-13 2020-06-02 주식회사 신원알피씨 Bracket for cantilever and cantilever construction method using the bracket
KR102156678B1 (en) * 2019-12-19 2020-09-16 (주)신화 Prefabriated footbridge
KR102156689B1 (en) * 2019-12-19 2020-09-16 (주)신화 Footbridge with truss structure

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KR100995857B1 (en) * 2010-07-09 2010-11-22 동방엔지니어링 주식회사 Support material of construction sidewalk for bridge

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KR100995857B1 (en) * 2010-07-09 2010-11-22 동방엔지니어링 주식회사 Support material of construction sidewalk for bridge

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104195952A (en) * 2014-08-20 2014-12-10 中铁四局集团第二工程有限公司 Steel box girder erection method applied to steel and concrete hybrid girder cable-stayed bridge
KR101796210B1 (en) * 2016-12-14 2017-11-09 이성원 Bracket for cantilever and cantilever construction method using the bracket
KR20180122075A (en) * 2017-05-02 2018-11-12 이성원 Cantilever bridge with t-type fixinf support bracket
KR102026976B1 (en) * 2017-05-02 2019-09-30 이성원 Cantilever bridge with t-type fixinf support bracket
KR20190014813A (en) * 2017-08-04 2019-02-13 한국도로공사 Construction method for cantilever in steel composite girder bridge
KR102080492B1 (en) * 2017-08-04 2020-02-24 한국도로공사 Construction method for cantilever in steel composite girder bridge
KR102156678B1 (en) * 2019-12-19 2020-09-16 (주)신화 Prefabriated footbridge
KR102156689B1 (en) * 2019-12-19 2020-09-16 (주)신화 Footbridge with truss structure
KR20200061327A (en) 2020-05-13 2020-06-02 주식회사 신원알피씨 Bracket for cantilever and cantilever construction method using the bracket

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