KR100227165B1 - The suspension beam of movable scaffolding system in bridge construction - Google Patents

Abstract

The present invention relates to a cross beam of a mobile scaffold for bridge construction.

The mobile scaffolding method is a method of constructing the upper structure of a bridge one by one using a special mobile scaffolding with formwork. The structure of the cross beam, which is a part of the formwork supporting device of a mobile scaffold used in the related art, is placed on the upper part of a pair of horizontal supporters 10 installed on both sides of the upper part of the piers P as shown in FIG. 1 across two piers. It is a configuration that is fixed by placing at a predetermined interval over the upper left and right sides of the box beam (GB) supported, the horizontal beam fixed to the top of the box beam (GB) every time the entire structure of the mobile scaffold is moved to the next construction span. The entire 30 should be completely dismantled from both side girders (GB) and transported separately to the next construction span using a moving means such as a crane, and then the girders (GB) are moved longitudinally to the next span. After arranging, the reassembled process of fixing the horizontal beams 30 separately transferred to the top of the box beams (GB) is carried out daily, and the cumbersome adjustment of the fixed position is performed. It was the fault to be done up.

The present invention solves the drawbacks of the conventional cross beams, and fixed to the inner side of the pair of box beams supported horizontally movable horizontally in the perpendicular direction of the bridge on the horizontal support fixed to the cross beams, It is characterized by separating the left and right symmetrical side beams and the other side beams located in a straight line with each other so as to be mutually fastened and separated by the fastening means, even when moving the entire structure of the mobile scaffold by one span. By fixing the relative position of the cross beams relative to the, it is characterized by providing a cross beam of the bridge scaffold portable scaffolding to reduce the work time and cost required for a separate movement or readjustment.

Description

Cross beam of portable scaffold for bridge construction

1 is an exemplary configuration diagram of a conventional portable scaffold for bridge construction

2 is an overall configuration front view of a mobile scaffold to which the present invention is applied.

3 is a plan view of FIG.

4 is a partially enlarged plan view of FIG.

5 is a cross-sectional view of a bridge deck construction apparatus by a mobile scaffold to which the present invention is applied.

6 is a one-sided configuration showing the horizontal beam installation configuration of the mobile scaffold according to the present invention

7 is a side configuration perspective view of an example mobile scaffold crossbeam according to the present invention

8 is an assembled state diagram of an example mobile scaffold crossbeam according to the present invention

9 is an excerpt of the phase present assembly of an example mobile scaffold crossbeam according to the present invention

10 is a form support state diagram by a mobile scaffold crossbeam of an example according to the present invention

Figure 11 is an embodiment of the height adjustment means used in the mobile scaffold crossbeam of an example

12 is an operating state diagram of an example of a mobile scaffold to which the present invention is applied,

(a) is a mobile scaffolding and formwork mounted state diagram

(b) is the form-de-form state diagram after the bridge deck is placed.

(c) is the transverse separation of left and right scaffolding and formwork for span movement of mobile scaffolds.

(d) is a state of remounting of the mobile scaffold in the moving span.

* Explanation of symbols for main parts of the drawings

Bg: Bridge deck F: Dies

F1: one side die F2: the other side

GB: Box Box GBa: One Side Box Box

GBb: Other side box K: Work scaffold

P: Pier W: Mobile bogie

10: conventional horizontal support 30: conventional horizontal beam

100: horizontal support 300 of the present invention: cross beam of the present invention

300a, 300b: one side, the other side cross 310: phase present

310a: present on one side 310b: present on other side

311: Sanghyun fixed plate 312a: One side award plate

312b: other side image-bearing plate 313: upper-side bolt hole

314: lower bolt hole 315: center rod

316: center hole 320: lower chord

320a: one side down current 320b: other side down current

321: Ha Hyun Fixed Edition 330: Saphenous

340: saphenous fixation plate 350a: one side lower port fastener

350b: other lower inferior fastener 351: protrusion

360: storage plate 361: storage hole

370: beam connecting member 400: fastening means

402: lower fastening bolt 500: height adjustment means

501: pedestal 502: platform

503: one side control 504: the other side control

505: adjusting bolt 506: nut

The present invention is to reduce the work time and cost required to eliminate the additional movement or readjustment even when moving to the next span during the construction of the bridge deck (Bg) using the movable scaffolding system method It is about the cross beam of the bridge scaffold which makes it possible.

The mobile scaffolding method is a method of constructing the upper structure of a bridge one by one using a special mobile scaffolding with formwork. This method was first developed in Germany, and was first used in Germany in 1959 and has been widely used in developed countries since the 1970s.

This mobile scaffolding method was introduced in Korea by the construction of Noryang Bridge in 1983.

However, the horizontal beam 30, which is a part of the formwork (F) supporting device of the mobile scaffold, which is conventionally introduced and used in Korea, is a pair of horizontal supporters supported on both sides of the upper part of the piers P, as shown in FIG. 10) has a technical configuration of a single structure that is fixed and supported by a predetermined interval over the top of the left and right pair of box beams (GB) to be supported in the longitudinal direction of the bridge.

The horizontal beam 30 of the conventional bridge construction mobile scaffold 30 is simply placed on the top of the box beam GB and fixed by the technical configuration, so that each time the entire structure of the mobile scaffold is moved to the next construction span of the box beam GB. The entire horizontal beams 30 fixed to the upper part must be completely dismantled from both side box beams (GB) and transported separately to the next construction span by using a moving means such as a crane, and then the box beams (GB) are next spanned. After moving to the vertical direction to align and then carry out the reassembly process of fixing the horizontal beams (30) transported separately to the top of the box beam (GB), and repositioning the fixed position accurately to perform the cumbersome work There was a flaw.

An object of the present invention is to fix the relative position of the cross beams to the box beam even when moving the entire structure of the mobile scaffolding by one span, so that a separate movement or readjustment work can be omitted so that the work time required for the readjustment work The purpose is to provide a crossbeam for the bridge scaffold's portable scaffolding, which helps to reduce costs and costs.

Hereinafter, the technical configuration of the present invention in detail.

The cross beam 300 of the mobile scaffold of the present invention is also supported by a box beam GB supported on a pair of horizontal supporters 100 which are supported on both sides of the upper part of the pier P. This can be said to be similar.

However, the horizontal beam 300 of the present invention is fixed to the inner surface of the pair of box beams (GB) which are supported on the horizontal pedestal 100 is fixed to the pier (P) so as to be able to move horizontally in the perpendicular direction. However, the left and right symmetrical robots (300a) and the other side 300b (300b) of the left and right symmetrically located on a straight line are separated, the one side 300b and the other side 300b is fastened to each other by the fastening means (400) It is configured to be separated as a basic feature of the technical configuration.

The horizontal beam 300 of the present invention configured as described above moves the pair of box beams GB inwards when supporting the formwork F for the bridge deck Bg for concrete construction of the bridge deck Bg. After the one side robo 300a and the other side robo 300b are as close to each other as possible, the fastening means 400 fastens the one side robo 300a and the other side robo 300Ob to fully load the load transferred from the upper side as a structure. When the entire structure of the mobile scaffold can be moved by one span, the fastening means 400 is dismantled to separate one side robo 300a and the other side robo 300b into separate structures, respectively. Transversely moving the pair of box beams (GB) on the horizontal pedestal (100), respectively, so that the inner end of one side beams (300a) and the other side beams (300b) are located outside the piers (P) It is operated so as not to interfere with the city piers (P).

The present invention operated as described above has a structure in which the one side girder 300a and the other side girder 300b are symmetrically fixed to the inner side of the left and right box beams GB at predetermined intervals, respectively, so that the entire structure of the mobile scaffold is limited. Even if the interval is moved by each other, the relative position of the box beam GB and the cross beam 300 does not occur.

Therefore, the present invention has the advantage of reducing the time and cost of the labor required to move the cross beams to the next span, and to accurately readjust the relative position of the box beams (GB) and the cross beams (300).

Hereinafter, the present invention will be described in detail with examples.

One embodiment of the present invention, as shown in 2-15 degrees, such as one side of the horizontal beam is fixed at a predetermined interval on the inner surface of the one side box (GBa) to be supported on the top of the horizontal support 100 ( 300a) and the other side robo 300b which are symmetrical on the same plane with the one side girder 300a at predetermined intervals on the inner side of the other box girder GBb, and the one side and the other side girder 300a, 300b. Consists of fastening means 400 for fastening them mutually.

On the other hand, since one side of the crossbeam (300a) and the other side of the crossbeam (300b) has a mutually symmetrical structure it can also be described collectively as a crossbeam (300).

As shown in FIGS. 6, 7, 8, one side girder 300a and the other side girder 300b have a structure of a cantilever having one end fixed to an inner side surface of the box beam GB.

In the embodiment of the present invention, the horizontal beam 300 is bonded to the inner upper surface of the box beam (GB) as shown in FIG. 7 and the horizontal chord 310 and horizontally extending in the perpendicular direction, the box beam (GB) The lower chord 320 and the upper chord 310 and the lower chord 320 extending in parallel with the upper chord in the perpendicular direction and fixed to the inner side of the bottom surface; It has a structure of a truss consisting of the saphenous material 330 to be welded through.

Cross beam 300 of the embodiment of the present invention having a structure of the truss is not only connected to the triangular members, but also helps to bear a large bending moment load with a relatively light weight because the dance is relatively high.

In this way, it is important to install and operate the mobile scaffold to be able to bear the large load acting during the concrete pouring work of the bridge deck (Bg) with a relatively light weight of its own.

In general, when the span between pier (P) and pier (P) is 40m, the overall length of the mobile scaffold should be more than 80m, which is twice the span, so the mobile scaffold itself becomes a large structure. This is because it not only provides work convenience in moving installation, but also helps to reduce manufacturing cost.

In addition, the upper chord 310, the lower chord 320 and the composite 330 is made of a square pipe, and the upper chord 310 and the lower chord 320 is bonded to the box beam (GB) As shown in FIG. 7, the upper fixing plate 311 and the lower fixing plate 321 are fixed by welding.

In the embodiment of the present invention, the cross beams 300 are manufactured by the factory as a separate body and brought into the construction site after construction by the upper stationary fixing plate 311 and the lower stationary fixing plate 321 fixedly attached to its ends. Bolting is fixed to the inner surface of the box beam (GB) at predetermined intervals at the site.

The fastening means 400 has a cantilever type structure having one end fixed to the inner surface of the pair of box beams GB at a predetermined interval, and has one side robo 300a and the other side robo 300b facing symmetrically on the same plane. By fastening the free ends of each other, one side beam 300a and the other side beam 300b refers to a structure that serves to perform a structural function as one cross beam 300 is fixed to the box beam (GB) of both sides.

In the present embodiment, the fastening means 400 fastens the one side phase currents 310a of the one side girder 300a and the other side phase currents 310b of the other side robo 300b as shown in FIGS. 7 and 8. The fastening bolts fixed to each other, and the lower fastening bolts 402 of one side lower chord (320a) and the other side lower chord (320b) of the other side 300 (b).

On the free ends of one side chord 310a and the other side chord 310b, reducing the self-load with the phase-locking bolt 401 not only provides operational convenience to the mobile installation of the mobile scaffold, but also reduces the manufacturing cost. Because it helps.

In addition, the upper chord 310, the lower chord 320 and the composite 330 is made of a square pipe, and the upper chord 310 and the lower chord 320 is bonded to the box beam (GB) As shown in FIG. 7, the upper fixing plate 311 and the lower fixing plate 321 are fixed by welding.

In the embodiment of the present invention, the cross beams 300 are manufactured by the factory as a separate body and brought into the construction site after construction by the upper stationary fixing plate 311 and the lower stationary fixing plate 321 fixedly attached to its ends. Bolting is fixed to the inner surface of the box beam (GB) at predetermined intervals at the site.

The fastening means 400 has a cantilever type structure having one end fixed to the inner surface of the pair of box beams GB at a predetermined interval, and has one side robo 300a and the other side robo 300b facing symmetrically on the same plane. By fastening the free ends of each other, one side beam 300a and the other side beam 300b refers to a structure that serves to perform a structural function as one cross beam 300 is fixed to the box beam (GB) of both sides.

In the present embodiment, the fastening means 400 fastens the one side phase currents 310a of the one side girder 300a and the other side phase currents 310b of the other side robo 300b as shown in FIGS. 7 and 8. The fastening bolts fixed to each other, and the lower fastening bolts 402 of one side lower chord (320a) and the other side lower chord (320b) of the other side 300 (b).

The free standing ends of one side chord 310a and the other side chord 310b and the one side topside plate 312a and the other side topside plate through which the upper side bolt holes 313 are bored to be supported. 312b are respectively welded and fixed.

In addition, the one side image current (310a) and the other side current (310b) is a pair of double sided box beam (GB) when the maximum moving from the upper side of the horizontal support (100) to the inside of the one side upper image plate (312a) and the other side image The fastening plate 312b has a length that abuts each other at the center.

This is to ensure that the present chord 310 does not interfere with the function of the compression member.

As shown in FIG. 9, a conical center rod 315 protruding horizontally from the center thereof is fixed to one of the one upper side image plate 312a and the other side image plate 312b, and the other one. The center hole 316 into which the center rod 315 is inserted is drilled.

This configuration is to move the box beams (GB) on both sides inward on the horizontal support (100) as far as possible to move the horizontal beams (300a, 300b) on both sides of the one side overturning plate (312a) and the other side overturning plate (312b) in a straight line When assembling, the center bar 315 provided on one side overturning plate 312a is easily installed in the center hole 316 installed on the other side overturning plate 312b even if one side of the cross beams 300a and 300b slightly shifts in a straight line. Induction insertion has the effect of automatically center alignment.

As shown in FIG. 7, the free end portions of the one side lower chord 320a and the other side lower chord 320b have one side lower side fastening in which the bolt holes 314 are bored so that the lower side fastening bolts 402 are supported therethrough. The sphere 350a and the other lower side fastening sphere 350b are welded and fixed, respectively.

In addition, the one lower lower chord 320a and the other lower chord 32 have a pair of both side beams (GB), even if the maximum movement from the upper side of the horizontal support 100 to the inner side of the lower side fastener (350a) and the other side The fastener 350b is spaced to some extent.

Since the lower chord 320 acts as a tension member, the lower chord 320 does not interfere with the structural role even if the lower chords 320 on both sides do not touch each other, thereby reducing the load of the member itself and thereby reducing the overall cross beam. This is to reduce the self-load of (300).

Meanwhile, as shown in FIG. 7, the lower fasteners 350a and 350b have a shape of a chopped square pipe, so that protrusions 351 slightly protruding from both sides to the free end of the lower chord 320 may be formed. The lower end bolt holes 314 are drilled in the protrusions 351, and the lower chords 320a and 320b pass through the lower bolt holes 314 of the lower port fastening holes 350a and 350b. The lower fastening bolts 402 are fastened to each other.

The reason why the lower fasteners 350a and 350b have the shape of a square pipe is to prevent the lower fasteners 350a and 350b from being crushed due to the tensile force acting on the lower fastening bolts 402. It is not only structurally efficient but also convenient for fastening.

When the horizontal beam 300 of the embodiment of the present invention configured as described above supports the formwork F for the bridge deck Bg for concrete construction of the bridge deck Bg, each of the box beams GB on the left and right piers ( P) After moving to the inside of the center portion, the cross beams 300 on both sides are fastened to the upper fastening bolts 401 and the lower fastening bolts 402 so that both the box beams GB and the horizontal beams 300 are one. When combined as a structure to sufficiently handle the load delivered to the upper part, and when the concrete construction of the bridge top plate (Bg) is completed in one span and the entire structure of the mobile scaffold is moved to the next construction span, After dismantling the bolts 401 and 402 to separate the one side girders 300a and the other side girders 300b as separate structures, respectively, the pair of left and right box gigabytes GB is moved outwardly using a moving cart W, respectively. Sideways By moving, the side fastening plate (312a) (312b), which is the inner end of the side girders (300a) and the other side girders (300b) are opened to a position that does not interfere with the piers (P), on the horizontal support (100) Both side beams (GB) that are longitudinally moved to the next construction span on the installed moving trolley (W) to enable movement at the same time both side beams 300 are also fixed to the inner side of the box beam (GB), both sides Move to the next span with the box beams (GB).

The embodiment of the present invention, firstly, because the horizontal beams 300 are divided into left and right symmetrical and are fixed to the inner surface of the left and right box beams (GB), even if the entire structure of the mobile scaffold moving by one span. Since the relative position of the GB and the cross beam 300 does not occur, it is not necessary to take extra time and cost to accurately reposition the relative positions of the box beams and the cross beam 300. In addition, compared to moving the several cross beams 30 to the next interval in a separate moving means and process as in the prior art by removing the movement process of the cross beams 300 itself, it is possible to obtain a cost reduction accordingly Since the cross beam 300 has a relatively high dance and each component has a structure of a truss connected by a triangle, the cross beam 300 has a relatively low self-load. At the same time, it possesses the ability to handle relatively large bending moments, which greatly reduces the load on the entire mobile scaffold.

On the other hand, the present invention is in addition to the basic technical configuration, when the following additional technical configuration is added to the present invention, its usefulness is more important.

The lower fastening bolts 402 are relatively long because the lower chords 320 that are spaced from each other are used to fasten.

As such, the problem of keeping the relatively long lower back fastening bolts 402 after dismantling is very cumbersome.

Therefore, in the embodiment of the present invention, as shown in FIG. 7, the bolt holding plate 360 is fixed to both sides of the lower chord 320 away from the both lower lower fasteners 350a and 350b. The storage hole 361 is bored in the bolt holding plate 360 to be in line with the lower bolt holes 314 drilled in the lower fasteners 350a and 350b.

The bolt holding plate 360 supports one end of the dismantled lower fastening bolts 402 to separate both side beams 300 as shown in FIG. 12 so that the mobile scaffold is moved to the next construction span at all times. To keep it.

In addition, the cross beams 300 having a truss structure are firmly connected to each other by the beam connecting members 370 between the front and rear cross beams 300, as shown in FIG. Work scaffolding K is installed.

Such working scaffold K is generally very helpful for the safety of the operator performing various tasks in the upper portion of the cross beam 300 located in a high place.

In addition, formwork for the bridge top plate (Bg) placed on the upper by placing the height adjusting means 500 as shown in the 5, 6, 10 degrees on the upper chord 310 of the cross beams 300 ( The height of F) can be partially adjusted.

Arrangement of the height adjustment means 500 such that when the concrete construction of the bridge deck (Bg) is completed by raising the amount of deflection of the bridge deck (Bg) to be generated by the weight of the concrete itself in advance to prevent the occurrence of deflection phenomenon in advance It will greatly help you.

In the embodiment of the present invention, as shown in FIG. 11, the height adjusting means 500 has a pedestal 501 having inclined surfaces narrowing upwardly on both sides thereof, and disposed on an upper portion of the pedestal and downwardly at both sides thereof. Platform 502 having narrower inclined surfaces, one side control unit 503 having corresponding inclined surfaces to slide in contact with the inclined surfaces of the pedestal 501 and the platform 502, and the other side control 504 And an adjustment bolt 505 having a function of adjusting the mutual spacing through the central portions of the one and the other side adjustment units 503 and 504.

The height adjusting means 500 is pushed on the inclined surfaces of both side adjusters of the side adjuster bolts 505 to the nut 506 by narrowing the mutual gap of the one and the other side adjusters (503,504) to contact each other, the lifting platform 502 is upwards As it rises, the lifting bolt 502 is lowered by the load acting on the upper part of the lifting platform 502 by releasing the adjusting bolt 505 to widen the mutual gap between the one side and the other adjusting members 503 and 505.

As such, in the embodiment of the present invention, the height adjusting means 500 may be disposed on the upper side of the horizontal beam 300, so that the horizontal beams 300 have a structure in which the side beams GB are fixed to the inner side of the side beams GB. Relative position relative to) remains stable.

In addition, the 12-th tea ceremony is that the bridge formwork (F) is separated into one formwork (Fl) and the other formwork (F2), one side formwork (F1) is supported on the upper side of one side crossbeam (300a), the other formwork (F2) ) Shows a structure that is supported on the top of the other side girbo (300b).

This configuration is separated with them when the mobile scaffold is moved to the next span to separate the one side girders 300a and the other side girders 300b from each other, and when they are joined to each other for the concrete construction of the bridge deck Bg. Combined together.

Thus, the configuration of an embodiment formwork (F) of the present invention is separated into one formwork (F1) and the other formwork (F2) on both side cross beams 300 that are integrally supported on the inner side of each side box (GB), respectively. Unlike the conventional structure, which is supported by the horizontal beams 30 of the single structure, which is supported by being mounted on and fixed on both sides of the box beams GB, the supporting structure is very stable.

That is, even after the span movement, the relative positions of the box beam GB, the cross beam 300 and the formwork F are maintained stably. The stabilization of the relative position between each member has the effect of greatly reducing the labor and labor costs of workers in the re-adjustment of the relative position of each member that occurs after the movement of the mobile scaffold in the concrete overhead work of the bridge deck (Bg). give.

As described above, even if the horizontal beam 300 of the mobile scaffold of the present invention moves the entire structure of the mobile scaffold by one span, the relative positions of the box beams (GB) and the horizontal beams 300 and the formwork (F) are accurately readjusted. It does not take extra time and cost, and has the ability to handle relatively large bending moments while relatively reducing the load of the cross beams 300, thereby drastically reducing the load of the entire mobile scaffold. Its own cost is also very useful because of its significant effect.

Claims (3)

One side robo 300a fixed to the inner side of one side box (GB) supported horizontally on the upper side of the horizontal support 100, which is supported on the upper both sides of the bridge (P) at a predetermined interval, and the other box Fastening means for fastening the other side girder 300b and the one side and the other side girder 300a and 300b which are symmetrical on the same plane with the one side girder 300a at predetermined intervals on the inner side of the beam GB ( 400, the fastening means 400 to fasten or separate the one side gabor 300a and the other side gabor 300b, the one side of the one side and the other side gabor (300a, 300b) The free end portions of the current 310a and the other side current 310b are welded and fixed on one side top plate 312a and the other side top plate 312b through which the upper bolt holes 313 are drilled, respectively. 310a) and the other phase current 310b can receive a pair of both box gigabytes. One side upper surface fastening plate (312a) and the other side upper surface fastening plate (312b) has a length in contact with each other at the center when the maximum movement from the top of the base 100, the one side upper surface fastening plate (312a) and the other side fastening A bridge characterized in that one of the plates 312b is fixed with a conical center rod 315 which projects horizontally outward from its center, and the center hole 316 into which the center rod 315 is inserted is drilled in the other. Crossbeam of portable scaffolding for construction. The free ends of the one side lower chord 320 and the other side chord 320 forming the one side and the other side girder (300a, 300b) has a four-quarter square pipe shape and the left and right of the lower chord 320 One side lower body fastener 350a and the other lower body fastener 350b having the protrusions 351 slightly protruding from both sides of the cross-sectional width are welded to each side, and the lower part fasteners 350a and 350b are attached to the protrusions 351. Cross beam of the bridge scaffolding mobile scaffold, characterized in that it comprises a lower bolt hole 314 for fastening them to the lower fastening bolts (402). The pedestal 501 of claim 1, wherein the height adjusting means 500 disposed on the upper chords 310 of the cross beams 300 has a pedestal 501 having inclined surfaces narrowed to both sides thereof. One side adjuster having an inclined surface 502 having an inclined surface that is disposed on the upper side of the upper side and a lower side on both sides thereof, and the corresponding inclined surfaces to slide in contact with the inclined surfaces of the pedestal 501 and the platform 502 503 and the other side control unit 504 and the one side, the other side of the control frame 505 having a control bolt 505 having a function to adjust the mutual gap through the center of the control unit (503, 504) Crossroads.