KR20180064807A - The mould for fslm girder having the integral type inner mould base - Google Patents

Abstract

The present invention relates to a mold to manufacture a girder used for constructing a bridge and, more specifically, to a mold for a full span launching method (FSLM) girder with an integrated inner mold base, used for making a box-shaped girder used for an FSLM, which is a kind of a bridge construction method. According to the present invention, the mold for the FSPM girder comprises: a bottom mold installed on a bottom part to form the lower surface of the girder; an outer mold coupled to both sides of the bottom mold to form the outer wall of the girder and a cantilever part protruding from the outer wall; an inner mold installed in a space, which is formed when the bottom mold is coupled to the outer mold, in order to form the inner space of the girder; and an end part mold coupled to both side end parts of the outer mold in order to form both end part surfaces of the girder. Moreover, the inner mold includes an inner mold base disposed on the lower part of the inner mold box to support the inner mold box. As such, when the mold for the FSLM girder including an integrated inner mold base structure is removed, the inner mold base is able to be easily removed to enhance constructability and prevent damage to the inner mold base, thereby providing a cost reduction effect in accordance with reuse of the inner mold base.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a mold for an FSLM girder having an integral inner mold base,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold used to manufacture a girder used for constructing a bridge, and more particularly, to a mold used for constructing a box girder used in FSLM (FSLM: FULL SPAN LAUNCHING METHOD) To a mold for an FSLM girder having a mold base.

The FSLM method, which is a type of bridge construction method, is to construct a box girder designed as a span unit to connect the span of a bridge to a bridge construction site in a separate manufacturing site and transport it to a bridge construction site, To complete the upper part of the pier.

Typical box-type girders used in the FSLM method are formed as a unit of span with a body having an inverted trapezoidal shape and a cantilever part having a constant length from both sides of the upper end of the body part, and the inside of the body part being empty.

At this time, a prestressed girder for applying and applying concrete to the steel wire is used as the girder.

Accordingly, the FSLM method has advantages such as securing the uniform quality of the girders, shortening the air space, and reducing the construction cost by allowing the mold to be reused when the girders designed in span units are manufactured.

On the other hand, Korean Patent No. 10-1103001 discloses a technique for a panel device of a mobile type inner form as a content for forming a box type girder as described above.

At this time, in the prior art, several launching dies are provided at an interval that can support the support truss by the designed stress. In installing the launching die, the worker is fixedly installed by using the tie rod repeatedly, , The construction period is increased, and when the launching die is removed, the worker has to go into the girder and directly dismantle and transport the worker.

Korean Patent No. 10-1103001

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide an integral inner mold base which unifies an inner mold base for supporting an inner mold of a mold for an FSLM girder, And to provide a mold for a FSLM girder.

The present invention also relates to an FSLM girder having an integral inner mold base provided with a launching module for removing the inner mold base of the mold for the FSLM girder and providing a launching wheel to prevent damage to the inner mold base, To provide a mold.

According to an aspect of the present invention, there is provided a mold for manufacturing a box girder, comprising: a bottom mold provided at a bottom portion of the girder so as to form a lower surface; An outer mold coupled to both sides of the bottom mold to form an outer wall of the girder and a cantilever portion protruding from the outer wall; An inner mold provided in a space formed when the bottom mold and the outer mold are coupled so that an inner space of the girder is formed; And an end mold coupled with both side ends of the outer mold to form both side end faces of the girder, the inner mold being provided at a lower portion of the inner mold box, the inner mold base supporting the inner mold box .

The inner mold base includes a base plate formed in a rectangular plate shape; A support rail provided at an upper end of the base plate to integrally support the base plate; And a fixing link fixing linking member provided on both sides of the supporting rail and fixed to the base plate.

A launching module is provided at an inner lower end of the support rail to remove the inner mold base from the girder.

Wherein the launching module is hinged to an inner lower end of the inner mold base; A launching wheel provided on the end of the support and rotating; And a drive unit for rotating the support stand and the launching wheel.

The drive unit is a hydraulic jack provided on one side of the support.

The support stand and the hydraulic jack are connected by a hinge linker.

The support and the hydraulic jack are connected by a tension wire.

The launching wheel is pivoted and drawn or drawn from the lower end of the inner mold base in accordance with the relaxation and contraction of the hydraulic jack.

A first engaging jaw which is disposed on both sides of the support rail to limit the rotation angle of the support so that the launch wheel is positioned horizontally downward when the launch wheel is retracted; And a second engaging jaw for restricting a rotation angle of the support so that the launching wheel is separated from an upper portion of the concrete surface on which the base plate is laid when the launching wheel is drawn out.

Meanwhile, the bottom mold is provided with a variable module which can be moved up and down by an external force so as to prevent breakage of the girder end portion.

The variable module includes: a wedge-shaped lower wedge piece provided at the bottom mold end; An upper wedge piece disposed at an upper end of the lower wedge piece in contact with the upper end of the lower wedge piece; And a bottom plate provided on the upper wedge piece to support the girder.

Wherein the lower wedge piece has a lower surface fixed to an upper end of the bottom mold end and an upper surface formed as an inclined surface; The upper wedge piece has an inclined lower surface contacting the lower wedge, and the upper surface supports the girder.

The inclined surfaces of the lower wedge piece and the upper wedge piece are formed as inclined surfaces that are lowered from the upper side of the inside of the bottom mold to the lower side of the bottom mold.

Wherein the lower wedge piece is movable in a horizontal direction, and is configured to be fixed in a vertical direction; The upper wedge piece is movable in a vertical direction, and is fixed in a horizontal direction.

A hydraulic jack is provided on one side of the lower wedge to provide an external force for the horizontal movement of the lower wedge.

The hydraulic jack is driven to move the lower wedge piece inward before detentional tension.

The bottom plate descends with the end of the girder so that the end of the girder is not broken when the end of the girder deforms downward due to a compressive force applied to the concrete under the girder after detent.

The upper support member may have one end coupled to the upper end of the coupling plate and the other end coupled to the lower surface of the corner panel to support the corner panel; The lower support member has one end coupled to the lower end of the coupling plate and the other end engaged with the lower panel to support the lower panel; Wherein the corner panel bottom portion is provided with an upper jack for supporting the corner panel and the side wall panel; The side wall panel is provided with a lower jack for supporting the side wall panel and the lower panel.

A plurality of inner mold bases for supporting the inner mold box are provided at the lower end of the inner mold box; The upper end of the inner mold base is provided with a roller for allowing the inner mold box to move when the inner mold box is mounted.

One end of the upper support member and the lower support member are coupled to the coupling plate by nut coupling or pin coupling of the fixing member.

The inner mold further includes a plurality of rotation hinges which are provided on both sides of the inner mold box such that one side of the upper support member and one side of the lower support member are nut-coupled or pin-

The rotary hinge comprising: a rotation plate coupled to the inner mold box side; And a fastening plate extending from the rotation plate and fastening one side of the upper support member.

The upper and lower support members are mounted on both side surfaces of the inner mold box to support the upper support member and the lower support member.

The cradle is formed in the shape of a channel having an open upper end and a closed side and a lower end, and the upper support member and the lower support member are mounted.

The mold for an FSLM girder having an integral inner mold base according to a specific embodiment of the present invention as described above can be expected to have the following effects.

That is, the present invention can easily remove the inner mold base when the mold for the FSLM girder having the integral inner mold base structure is detached, thereby improving the workability and preventing the inner mold base from being damaged, There is cost saving effect by reuse.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exemplary view showing an example of construction of a girder manufactured by using a mold for an FSLM girder according to a specific embodiment of the present invention. FIG.
Fig. 2 is an exemplary view showing a mold for an FSLM girder according to a specific embodiment of the present invention; Fig.
3 is an illustration showing an inner mold of a mold for an FSLM girder according to a specific embodiment of the present invention.
4 is an exemplary view showing a structure of an inner mold of a mold for an FSLM girder and an example of setting a mold according to a specific embodiment of the present invention.
5 is a view illustrating a folding structure for demolding an inner mold after curing and curing in an inner mold fixing structure of a mold for FSLM girders according to a specific embodiment of the present invention.
6 is an exemplary view showing an example of an inner mold demolding according to a specific embodiment of the present invention.
7 is an exemplary view showing an inner mold base according to a specific embodiment of the present invention.
FIG. 8 is an exemplary view showing a launching module structure for removing an inner mold base according to a specific embodiment of the present invention. FIG.
Fig. 9 is an exemplary view showing an example of pivoting of a launching wheel for removing an inner mold base according to a specific embodiment of the present invention; Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a configuration according to a specific embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a view illustrating an example of a construction of a girder manufactured using a mold for an FSLM girder according to a specific embodiment of the present invention, FIG. 2 is a view illustrating a mold for an FSLM girder according to a specific embodiment of the present invention FIG. 3 is an exemplary view showing an inner mold of a mold for an FSLM girder according to a specific embodiment of the present invention, FIG. 4 is a view showing a structure of an inner mold of a mold for an FSLM girder according to a specific embodiment of the present invention, 5 is a view showing an example of a folding structure for demolding an inner mold after concrete pouring and curing in an inner mold fixing structure of a mold for an FSLM girder according to a specific embodiment of the present invention. FIG. 6 is an exemplary view showing an example of an inner mold demolding according to a specific embodiment of the present invention, FIG. 7 is an exemplary view showing an inner mold base according to a specific embodiment of the present invention, 8 is an exemplary view showing a launching module structure for detaching an inner mold base according to a specific embodiment of the present invention, and FIG. 9 is a view showing an example of pivoting of a launching wheel for removing an inner mold base according to a specific embodiment of the present invention It is an example.

First, in manufacturing a FSLM girder according to a specific embodiment of the present invention, the FSLM girder mold has a body portion 11 having an inverted trapezoidal shape and a cantilever portion 12 on both sides of the body portion 11 And is used to manufacture an extended protruded box-shaped girder 10.

At this time, the girder 10 is installed in a state in which a tensile material is stretched, and the girder 10 is manufactured by casting concrete by using a mold 30 for an FSLM girder to be described later.

In order to manufacture the above-mentioned girder 10, the mold 30 for the FSLM girder according to the specific embodiment of the present invention is provided on the bottom portion to form the lower surface of the girder 10 as shown in FIG. An outer mold 200 coupled to both sides of the base mold 100 to form a base mold 100 and a body 11 and a cantilever 12 of the girder 10, An inner mold 300 provided in a space so as to form an inner space of the girder 10 and an end mold 400 installed at both ends of the outer mold 200 so as to form an end surface of the girder 10 ).

At this time, the base mold 100 is formed in a plate shape having a flat or predetermined curved surface shape so that the girder can be easily demolded.

The outer surface of the body portion 11 of the girder 10 and the cantilever portion 12 of the girder 10 are formed at both upper ends of the base mold 100 so as to form the body portion 11 and the cantilever portion 12 of the girder 10. [ The outer mold 200 formed in a shape corresponding to the outer mold 200 is engaged.

The inner mold 300 is provided in a space formed when the base mold 100 and the outer mold 200 are coupled to each other to form an inner space of the girder 10.

At one end and the other end of the outer mold 200, the end mold 400 is coupled to form an end surface of the girder 10.

2 and 3, the inner mold 300 includes an upper panel 311 for forming the upper surface of the inner surface of the girder 10, and a lower panel 311 coupled to both sides of the upper panel 311 A side wall panel 313 coupled to the corner panel 312 to form a side surface of the inner surface of the girder 10, And a lower panel 314 coupled with the side wall panel 313 to form a bottom surface of the inner surface of the girder 10 and a lower panel 314 which supports the panel module 310 A box-shaped inner mold box 340 and the inner mold base 350 supporting the lower portion of the inner mold box 340.

The panel module 310 is hinged to the upper panel 311, the corner panel 312, the side wall panel 313 and the lower panel 314, It is possible to pivot to a position for demolding.

And a main jack 315 for lifting or lowering the upper panel 311 is provided at an upper end of the inner mold box 340 and a support plate 316 for supporting the upper panel 311.

An upper support member 320 is provided at the upper end of the side surface of the inner mold box 340 to support the corner panel 312.

A lower support member 330 is provided at the lower end of the side surface of the inner mold box 340 to support the lower panel 314.

At this time, a plurality of coupling plates 341 protrude from both sides of the inner mold box 340 so that the upper support member 320 and the lower support member 330 are engaged.

Each of the panels of the panel module 310 is formed with a plurality of coupling plates 341 protruding inwardly so that the upper support member 320 and the lower support member 330 are coupled to each other.

The upper support member 320 has one end coupled with the upper end of the coupling plate 341 formed on the inner mold box 340 and the other end coupled with the fixed plate formed on the inner surface of the corner panel 312, And supports the corner panel 312.

One end of the lower support member 330 is engaged with the lower end of the coupling plate 341 formed on the inner mold box 340 and the other end is engaged with a fixing plate formed on the inner surface of the lower panel 314, Thereby supporting the panel 314.

An upper jack 321 for supporting the corner panel 312 and the side wall panel 313 is provided on the inner side surface of the corner panel 312.

A lower jack 331 for supporting the side wall panel 313 and the lower panel 314 is provided on the inner side surface of the side wall panel 313.

The upper jack 321 is for supporting the corner panel 312 and the side wall panel 313 and has one side fixed to the fixing plate formed on the inner side surface of the corner panel 312 by a fixing nail fixing hinge And the other side can be coupled by a nut fastening hinge engagement of the fixing member with the fixing plate formed on the inner side surface of the side wall panel 313. [

The inner mold box 340 is provided at the lower end of the inner mold box 340 to receive the inner mold box 340.

At this time, the inner mold base 350 is installed at a designed placement position and supports the inner mold box 340 supporting the panel module.

Hereinafter, the inner mold base 350 will be described in detail with reference to an inner mold demolding to be described later.

On the other hand, as shown in FIG. 4, the mold for the FSLM girder cures by pouring concrete when the setting of the panel and the tensile material is completed.

Hereinafter, referring to FIG. 5, a description will be given of an inner mold demolding from a girder generated by placing and curing concrete.

When the mold 30 for the FSLM girder is set, a tensile material is laid. When concrete is cured and cured in the mold 30 for the FSLM girder, the girder is completed.

At this time, the inner mold 300 provided inside the girder can be demolded from the girder after the panel module 310 is folded as shown in FIG.

5, the inner mold 300 removes the upper support member 320 and the lower support member 330 from the inner mold 300 to demold the girder 10 .

The inner mold 300 as described above is removed using an inner mold base supporting the lower end of the inner mold box as shown in FIG.

Hereinafter, an internal mold base according to a specific embodiment of the present invention will be described with reference to FIGS. 7 to 9. FIG.

7, the inner mold base 350 is provided on the bottom surface of the girder 10 so as to facilitate the demolding of the inner mold 300 into the girder 10.

8, the inner mold base 350 includes a base plate 351 formed in a rectangular plate shape, a support rail 352 provided on the base plate 351, and support rails 352 And a fixing member 353 fixed to both sides of the base plate 351 to engage with the base plate 351.

Here, the support rail 352 is integrally coupled to the base plate 351.

A plurality of launching modules 360 are provided at an inner lower end of the support rail 352 to detach the inner mold base 350 from the girder 10.

The launching module 360 is for releasing the launching wheel 362 when the inner mold base 350 is detached and allowing the inner mold base 350 to be easily removed. A support frame 361 hinged to an inner lower end of the inner mold base 350 and a launching wheel 362 provided at an end of the support frame 361 and a driving unit 362 for rotating the support frame 361 and the launching wheel 362, .

At this time, various means may be used to rotate the drive unit 361, but in the present invention, an example in which the hydraulic jack 363 is used will be described.

Here, the support base 361 and the hydraulic jack 363 may be connected by a hinge linker. Of course, the supporter 361 and the hydraulic jack 363 may be connected by a tension wire, but an example in which they are connected by a hinge linker will be described below.

9, when the hydraulic jack 363 is loosened, the support base 361 is rotated, and the inner mold 362 is rotated, When the hydraulic jack 363 is retracted, the support base 361 is pivoted to the inside of the inner mold base 350.

At this time, on both sides of the support rail 352, a first engagement protrusion 364 for limiting the rotation angle of the support base 361 and a launching wheel 362 for positioning the launching wheel 362 to be horizontally downward when the launching wheel 362 is inserted, A second latching jaw 365 for limiting the rotation angle of the support table 361 to maintain the base plate 351 spaced apart from the upper surface of the concrete.

Hereinafter, the process of removing the launching module 360 will be described.

When the inner mold base 350 is to be removed after the inner mold 300 is removed after the girder curing is finished and the girder curing is maintained in a state of being pulled in the inside of the support rail 352 at the time of curing of the girder, The support base 361 is rotated by the hydraulic jack 363.

At this time, as the support table 361 rotates, the launching wheel 362 is drawn downward. As the support table 361 moves in the vertical direction, the distance between the support rail 352 and the cured concrete surface The load is applied in the direction

Accordingly, the base plate 351 integrally formed with the support rail 352 is separated upward from the concrete surface.

Thereafter, the support table 361 further rotates to a position where the support table 361 is seated on the second latching jaw 365, and then the base is detached to the outside of the girder.

Accordingly, the inner mold base 350 has the effect that the base plate 351 is separated from the upper surface of the concrete by the launching module 360, so that the inner mold base 350 can be easily detached from the inside of the girder 10.

It will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention as defined in the appended claims. It is self-evident.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold used for manufacturing a girder used for constructing a bridge, and more particularly, to a mold used for constructing a box girder used in FSLM (Full Span Launching Method) The present invention relates to a mold for an FSLM girder having a mold base, and in particular, to a mold for FSLM girder having an integrated inner mold base structure, , The workability is improved, the inner mold base is prevented from being damaged, and the cost for reusing the inner mold base is reduced.

10: girder 11:
12: Cantilever section 20: Pier
30: mold for FSLM girder 100: bottom mold
200: outer mold 300: inner mold
310: Panel Module 311: Top Panel
312: Corner panel 313: Side wall panel
314: Lower panel 315: Fixing plate
320: Support module 321: Main jack
322: Support frame 323: Support plate
324: upper support bar 325:
326: Upper Jack 327: Lower Jack
340: inner mold box 341: engaging plate
350: Inner mold base 351: Base plate
352: support rail 353:
360: Launching module 361: Support
362: Launching wheel 363: Hydraulic jack
364: first latching jaw 365: second latching jaw
400: end mold

Claims (8)

In a mold for manufacturing a box girder,
A bottom mold provided at the bottom to form a lower surface of the girder;
An outer mold coupled to both sides of the bottom mold to form an outer wall of the girder and a cantilever portion protruding from the outer wall;
An inner mold provided in a space formed when the bottom mold and the outer mold are coupled so that an inner space of the girder is formed;
And an end mold coupled with both ends of the outer mold so that both side end faces of the girder are formed,
Wherein the inner mold comprises:
And an inner mold base provided at a lower portion of the inner mold box to support the inner mold box.
The method according to claim 1,
Wherein the inner mold base comprises:
A base plate formed in a rectangular plate shape;
A support rail provided at an upper end of the base plate to integrally support the base plate; And
And a fixed connection member provided on both sides of the support rail and fixed to the base plate to be engaged with the base plate.
3. The method of claim 2,
At the lower inner side of the support rail,
And a launching module is provided to remove the inner mold base from the girder.
The method of claim 3,
Wherein the launching module comprises:
A support base hinged to an inner lower end of the inner mold base;
A launching wheel provided on the end of the support and rotating;
And a drive unit for rotating the support and the launching wheel. The mold for an FSLM girder according to claim 1,
5. The method of claim 4,
The driving unit includes:
And a hydraulic jack provided on one side of the support.
6. The method of claim 5,
The support base and the hydraulic jack are connected to each other,
Wherein the hinged link is connected by a hinge linker. ≪ RTI ID = 0.0 > 11. < / RTI >
6. The method of claim 5,
The support base and the hydraulic jack are connected to each other,
Wherein the tensile wire is connected by tension wires. ≪ RTI ID = 0.0 > 11. < / RTI >
8. The method of claim 7,
The launching wheel
Wherein the support base is rotated and drawn or drawn from the lower end of the inner mold base in accordance with the relaxation and contraction of the hydraulic jack.

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