JP6926028B2 - Temporary pedestal row and method of constructing temporary scaffolding using it - Google Patents

Description

The present invention relates to a temporary pedestal row and a method for constructing a temporary scaffold using the same, and more particularly to a technique applicable and effective when constructing a skeleton such as an elevated railway structure directly above a railway in operation. ..

When constructing an elevated railway structure directly above a railway (business line) on a road surface that is in operation, it is first necessary to construct a temporary scaffolding for material fall protection and scaffolding for workers.

In addition, in the construction of elevated railway structures, there are restrictions on the work content during the operating hours of the railway, so arrangements are made to close the line of the business line and stop the feeder outside the operating hours of the railway at night, and cranes, etc. It is necessary to work with heavy machinery. This is because various heavy members pass over trolley lines, wire lines, communication lines, etc. while being lifted by a crane, and there is a risk of damage to these lines due to the heavy members falling or the load collapsing. be.

Here, the time during which work is possible outside the operating hours of the railway is a short time from the passage of the last deadhead train to the start of operation of the first train, and is generally only about 2.5 hours. Moreover, since the work preparation and tidying up are performed every time, the actual work time is further shortened.

In addition, since there is a risk of receiving noise complaints from neighboring residents due to the increase in work outside the railway operating hours, that is, night work, it is not possible to perform work using a large number of heavy machinery.

As a technique for efficiently installing a temporary scaffold used for construction on a business line on an existing skeleton constructed in advance, those described in Patent Document 1 and Patent Document 2 are known. There is.

Jikken Sho 53-043711 Utility Model No. 3086810

However, in all of the techniques described in Patent Documents 1 and 2 described above, since the temporary pedestal is hung from above the structure and the work floor is erected there, there is an obstacle to the work performed on the structure. Become.

The present invention has been made from the above-mentioned technical background, and an object of the present invention is to provide a technique capable of efficiently installing a temporary gantry even when there are restrictions on the work content.

In order to solve the above problems, the temporary gantry row of the invention according to claim 1 is composed of a plurality of pillars provided at predetermined intervals and artificial ground erected on the plurality of pillars. It is a temporary pedestal row installed on the skeleton, and is installed so as to be able to move up and down and rotate along the guide columns via guide columns attached to at least some of the columns in the vertical direction and hinges. The first temporary pedestal having the bracket member, a support pedestal installed between the plurality of columns, a guide column attached to the support pedestal in the vertical direction, and a hinge. It has a second temporary pedestal having a bracket member installed so as to be able to move up and down and rotatably along a guide column, and the bracket member of the first temporary pedestal and the bracket member of the second temporary pedestal. Is characterized in that it can rotate to a storage position along the extending direction of the skeleton and a deployment position protruding outward of the skeleton.

The temporary pedestal row of the invention according to claim 2 is installed between the plurality of pillars in the invention according to claim 1 and has a height lower than that of the support pedestal of the second temporary pedestal. A support pedestal, a guide stanchion that is attached to the support pedestal in the vertical direction and whose upper part protrudes upward from the support pedestal, and a guide strut that can be raised and lowered and rotatably installed along the guide strut via a hinge. It further has a third temporary pedestal having the bracket member, and the bracket member of the third temporary pedestal has a storage position along the extending direction of the skeleton and a deployment position protruding outward of the skeleton. It is characterized by being rotatable.

The temporary gantry row of the invention according to claim 3 is characterized in that, in the invention according to claim 1 or 2, it further has an anti-rotation jig for preventing the bracket member at the storage position from rotating. do.

The temporary gantry row of the invention according to claim 4 is characterized in that, in the invention according to any one of claims 1 to 3, the bracket member is provided with an insulating coating. ..

The temporary pedestal row of the invention according to claim 5 is developed from the storage position of the bracket member in a part of the adjacent temporary pedestals in the invention according to any one of claims 1 to 4. The directions of rotation to the position are opposite to each other.

In order to solve the above problems, the method for constructing a temporary scaffold of the invention according to claim 6 is a method for constructing a temporary scaffold using the temporary pedestal row according to any one of claims 1 to 5. , A step of installing the bracket member of each temporary pedestal in the retracted position at the lower part of the guide strut, and a step of lifting the bracket member to a predetermined height along the guide strut by a crane and fixing the bracket member to the guide strut. A step of rotating the bracket member fixed to the guide column at a predetermined height from the storage position to the unfolding position and fixing the bracket member at the unfolding position, and a work floor on the bracket member at the unfolding position. It is characterized by the process of erection and execution of.

In order to solve the above problems, the method for constructing a temporary scaffold of the invention according to claim 7 is a method for constructing a temporary scaffold using the temporary pedestal row according to any one of claims 1 to 5. , The step of installing the bracket member of each temporary pedestal in the retracted position at the lower part of the guide support, and lifting the bracket member of the first temporary pedestal by a crane to a predetermined height along the guide support. A step of fixing to the guide column and a step of rotating the bracket member of the first temporary pedestal fixed to the guide column at a predetermined height from the storage position to the deployment position and fixing the bracket member at the deployment position. A step of lifting the bracket member of the temporary pedestal other than the first temporary pedestal by a crane to a predetermined height along the guide support and fixing the bracket member to the guide support, and fixing the bracket member to the guide support at a predetermined height. A step of rotating the bracket member of the temporary pedestal other than the first temporary pedestal from the storage position to the unfolding position and fixing the bracket member at the unfolding position, and placing a work floor on the bracket member at the unfolding position. It is characterized by executing the process of erection.

In the method of constructing the temporary scaffold of the invention according to claim 8, in the invention according to claim 7, the bracket member of the first temporary pedestal is rotated to the unfolded position and fixed at the unfolded position. After executing the step, before executing the step of fixing the bracket member of the temporary pedestal other than the first temporary pedestal to the guide column at a predetermined height, the existing energization equipment is attached to the first temporary pedestal. It is characterized in that the step of replacing the bracket member with the above is executed.

According to the present invention, it is possible to perform a work that was conventionally performed in a time zone in which the work content is restricted, in a time zone in which the work content is less restricted.

In addition, it is possible to reduce the work during the time period when the work content is restricted, and it is possible to efficiently install the temporary pedestal.

It is a top view which shows the temporary pedestal row installed in the railway elevated structure which is one Embodiment of this invention. It is a perspective view of the 1st temporary pedestal. It is a side view which shows the guide support | bracket member which constitutes the 1st temporary pedestal. It is sectional drawing along the AA'line of FIG. FIG. 3 is a cross-sectional view taken along the line BB'of FIG. It is a perspective view which shows the installation structure of the guide support | bracket member which constitutes the 1st temporary pedestal. It is a perspective view of the 2nd temporary pedestal. It is a perspective view of the 3rd temporary pedestal. It is a perspective view of the support work stand for a single floor slab. It is explanatory drawing which shows a part of the process of constructing a new railway elevated structure in this embodiment. It is explanatory drawing of the process which follows FIG. It is explanatory drawing of the process which follows FIG. It is explanatory drawing of the process which follows FIG. It is explanatory drawing of the process which follows FIG. It is explanatory drawing of the process which follows FIG. It is explanatory drawing of the process which follows FIG. It is explanatory drawing of the process which follows FIG. It is explanatory drawing of the process which follows FIG. It is explanatory drawing of the process which follows FIG. It is explanatory drawing of the process which follows FIG. It is explanatory drawing of the process which follows FIG. It is explanatory drawing of the process which follows FIG. It is explanatory drawing of the process which follows FIG.

Hereinafter, embodiments as an example of the present invention will be described in detail with reference to the drawings. In addition, in the drawing for demonstrating the embodiment, the same constituent elements are in principle given the same reference numerals, and the repeated description thereof will be omitted.

FIG. 1 is a plan view showing a row of temporary pedestals installed in an elevated railway structure according to an embodiment of the present invention. In FIG. 1, the columns constituting the elevated railway structure and the beams erected on the columns are shown, but the illustration of the elevated slab (artificial ground) constructed via the beams is omitted. ..

In FIG. 1, a railway elevated structure (hereinafter, simply referred to as “structure”) C, which is a new skeleton, is constructed along with existing railway equipment such as a platform P, a rail (not shown), and a suspension line W1. At the boundary between the railway equipment and the elevated railway structure, a limit fence L indicating the construction limit range is installed.

In the structure C, a plurality of pillars Cp are installed at predetermined intervals along the existing track equipment, and a plurality of pillars Cp are also installed in other places. A beam Cb is erected between these columns Cp. The distance between the pillar Cp and the pillar Cp along the existing track equipment does not have to be constant.

Here, a first temporary pedestal (temporary pedestal) 1 is installed on the pillar Cp, and a second temporary pedestal (temporary pedestal) 2 or a third temporary pedestal (temporary pedestal) is installed between the pillar Cp and the pillar Cp. ) 3 is installed, and a row of temporary pedestals is formed by these first to third temporary pedestals 1, 2, and 3. In addition, a support stand 4 for a single floor slab is installed between some of the pillars Cp and the pillars Cp.

Bracket members 10 constituting the first to third temporary pedestals 1, 2 and 3 and some beams Cb of the single-floor slab support pedestal 4 cross the limit fence L described above and move to the existing railway equipment side. It is sticking out. Then, a floor girder 50a is erected between the bracket member 10 and the beam Cb.

Next, the first to third temporary pedestals 1, 2 and 3 forming the temporary pedestal row, and the support pedestal 4 for the single floor slab will be described. Here, FIG. 2 is a perspective view of the first temporary pedestal, FIG. 3 is a side view showing the guide columns and bracket members constituting the first temporary pedestal, and FIG. 4 is along the line AA'of FIG. FIG. 5 is a cross-sectional view taken along the line BB'of FIG. 3, FIG. 6 is a perspective view showing an installation structure of a guide column and a bracket member constituting the first temporary frame, and FIG. 2 is a perspective view of the temporary pedestal, FIG. 8 is a perspective view of the third temporary pedestal, and FIG. 9 is a perspective view of the support work pedestal for a single floor slab.

The temporary pedestal row is formed of the first to third temporary pedestals 1, 2 and 3 as described above because of the installation position with respect to the structure C and the like.

In FIG. 2, the structure C is composed of a column Cp and an elevated slab (artificial ground) Cf constructed on the column Cp via a beam Cb. Then, as shown in the figure, the first temporary pedestal 1 is provided on the pillar Cp of the structure C.

That is, in the first temporary pedestal 1, the guide column 11 is attached to the column Cp of the structure C in the vertical direction, and the bracket member 10 is installed on the guide column 11 via the hinge 12. The bracket member 10 includes a vertical member 10a along the guide column 11, a horizontal member 10b forming a substantially L shape with the vertical member 10a at the upper portion of the vertical member 10a orthogonal to the vertical member 10a, and a vertical member 10a. It is composed of a diagonal member 10c as a reinforcing member hung between the cross member 10b.

It should be noted that the first temporary pedestal 1 does not have to be provided on all the pillars Cp of the structure C, and there is a pillar Cp that is not provided when the distance between the pillars Cp and the pillars Cp is narrow. May be good. Further, the length of the bracket member 10 does not necessarily have to be the same, including the bracket member 10 of the second temporary pedestal 2 and the third temporary pedestal 3, which will be described later, and is a required length depending on the site. Can be set to.

As a result of adopting such a hinge structure, the bracket member 10 can rotate in the horizontal direction and stays within the construction limit range without exceeding the limit fence L (that is, the extending direction of the structure C). It moves to two positions, a storage position (along the structure C) and a deployment position that extends beyond the limit fence L and protrudes into the track facility (that is, protrudes outward from the structure C).

Including the bracket members 10 provided on the second and third temporary pedestals 2 and 3, which will be described later, the bracket members 10 have a water gradient such that the guide strut side 11 is under water, and rainwater is discharged. Care is taken not to flow to the existing home side.

The guide column 11 is fixed to the column Cp of the structure C by anchor bolts (not shown) that have been previously installed in the column Cp of the structure C. Further, as described above, the bracket member 10 is installed on the guide column 11 via the hinge 12.

Here, as shown in FIGS. 3 to 6, in the hinge 12 in which the rotating side plate 12a is fixed to the bracket member 10, the mounting side plate 12b constituting the other side of the hinge 12 is guided by the slide guide plate 13. The slide flange 11a of the support column 11 is sandwiched so as to be slidable. As a result, the bracket member 10 can be raised and lowered along the guide support column 11.

As shown in FIG. 2, the hinge 12 is fitted into the guide support 11 at the lower part of the guide support 11. Then, after the bracket member 10 is raised to a predetermined height by the crane 60 while being held at the retracted position, the mounting side plate 12b of the hinge 12 and the guide support column 11 are fixed with bolts. The combination of the guide support column 11 and the bracket member 10 is performed inside the limit fence L.

As shown in FIGS. 3 to 6, in order to prevent the bracket member 10 from rotating from the storage position to the deployment position due to stress or wind pressure during work, the bracket member 10 is held and held for holding in the storage position. A jig (rotation prevention jig) 14 is detachably attached between the rotation side plate 12a of the hinge 12 and the guide support column 11. Further, in the above-mentioned slide guide plate 13 on the rotation center R side of the bracket member 10, when the slide guide plate 13 comes into contact with the slide flange 11a, the bracket member 10 is further opposite to the unfolding position from the storage position. It has a function as an anti-rotation jig that prevents it from rotating.

The slide guide plate 13 having a function as a holding jig 14 and a rotation prevention jig is not limited to this shape. In addition, if there is no safety problem without using these rotation prevention jigs (for example, in a work environment where there is no concern about stress or wind pressure during work), or if the bracket member 10 is lifted, immediately. When changing from the storage position to the unfolding position, the use of the rotation prevention jig can be omitted.

As will be described later, the bracket member 10 of the first temporary pedestal 1 is set to the unfolded position and the train line is replaced by the bracket member 10. Therefore, for the purpose of safely performing the work, the bracket member 10 is painted with an insulating paint. Is used. Further, although the train line is not replaced with the bracket member 10 of the second temporary pedestal 2 and the third temporary pedestal 3, the insulating paint is similarly used because it is near the train line.

However, when it is not necessary to insulate the bracket member 10 in consideration of the train line or the like, the insulating paint may not be used for painting the bracket member 10.

Next, the second temporary pedestal 2 is provided between the pillar Cp and the pillar Cp of the structure C. As shown in FIG. 7, in the second temporary pedestal 2, a support pedestal 22 is installed on an independent concrete foundation 21, a guide support 11 is attached to the support pedestal 22, and a bracket member is attached to the guide support 11. 10 is installed.

That is, the pedestal foundation beam 22a, which is a component of the support pedestal 22, is fixed by anchor bolts (not shown) that are preliminarily charged in the concrete foundation 21. Further, a support frame 22 is constructed by mounting a frame support column 22b, a horizontal member 22c, a diagonal member 22d, and the like on the frame foundation beam 22a.

Then, a guide support column 11 having the same configuration as that of the first temporary frame 1 described above is attached to the frame support column 22b on the limit fence L side, and the bracket member 10 is installed.

The structures of the bracket member 10, the guide support 11, the hinge 12, the slide guide plate 13, the holding jig 14, and the like, including the third temporary pedestal 3, which will be described later, are the same as those described in the first temporary pedestal 1. Therefore, duplicate explanations will be omitted.

The third temporary pedestal 3 is also provided between the pillar Cp and the pillar Cp of the structure C. When trying to install the second temporary pedestal 2, the upper part of the support pedestal 22 and the installation position of the concourse of the station may overlap, and the installation may not be possible. In such a case, the third temporary gantry 3 is used. Therefore, if there is no place where the second temporary pedestal 2 cannot be installed between the pillar Cp and the pillar Cp, the third temporary pedestal 3 becomes unnecessary.

As shown in FIG. 8, in the third temporary pedestal 3, the height of the support pedestal 32 is lower than that of the support pedestal 22 of the second temporary pedestal 2 so as not to overlap with the installation range of the concourse. As a result, the upper part of the guide column 11 projects upward from the support frame 32.

Regarding the third temporary pedestal 3, the pedestal foundation beam 32a is fixed on the concrete foundation 31, and the pedestal column 32b, the horizontal member 32c, the diagonal member 32d, and the like are attached thereto to construct the support pedestal 32. The points are the same as those of the second temporary pedestal 2 described above.

Further, in the third temporary pedestal 3, in order to secure the supporting force of the bracket member 10, the support pedestal 32 is larger than the support pedestal 22 of the second temporary pedestal 2, and the guide support column 11 is further provided. Since the portion not supported by the support frame 32 becomes long, two steel materials are stacked in order to secure rigidity.

By the way, the directions in which the bracket members 10 of the first to third temporary mounts 1, 2 and 3 rotate from the storage position to the deployment position are basically the same (in the present embodiment, the fan-shaped rotation locus of FIG. 1). (Clockwise direction as shown by). However, if it rotates in that direction and interferes with an external structure such as a utility pole, it is installed so as to rotate in the opposite direction.

However, if it does not interfere with the external structure, the rotation directions of all the bracket members 10 may be the same.

Next, as shown in FIG. 1, the support frame 4 for the single-bed slab is provided at a place where the structure C is not constructed. The structure C, which is a ramen high bridge, is an SRC structure (Steel Reinforced Concrete Construction: steel-framed reinforced concrete structure), the beam Cb is constructed with a suspended formwork with the buried steel frame as a support material, and the elevated slab Cf precedes. A steel material is fixed to the floor slab to be constructed with anchor bolts installed in advance, and the construction is carried out with a hanging formwork using it as a support material. However, since a formwork is required in the range where the single-bed slab is installed, the support stand 4 for the single-bed slab is installed in the range.

In FIG. 9, the single-floor slab support pedestal 4 is installed at two locations sandwiching the second temporary pedestal 2 between the pillar Cp and the pillar Cp of the structure C. A first temporary pedestal 1 is installed on the pillar Cp.

As shown in the figure, in the support frame 4 for a single floor slab, a support frame 42 is installed on a concrete foundation 41. That is, the foundation beam 42a is fixed to the concrete foundation 41 with anchor bolts (not shown), the pedestal support column 42b is installed on the foundation beam by bolting, and the horizontal member 42c or the slant is installed between the pedestal support columns 42b. The material 42d is installed to form the support frame 42.

A square lumber 43 and a top beam 44 are installed on the gantry column 42, and a floor girder 50a is erected on the top beam 44. The floor girder 50a is previously loaded onto the elevated slab Cf by daytime work and temporarily placed.

It should be noted that these series of assembly operations are performed using the crane 60.

Next, from the construction of the temporary scaffolding using the first to third temporary pedestals 1, 2, 3 and the support pedestal 4 for the single floor slab of the present embodiment described above, the construction of a new railway elevated structure C The method up to this will be described with reference to FIGS. 10 to 23.

Here, FIG. 10 is an explanatory diagram showing a part of the process of constructing a new railway elevated structure in the present embodiment, FIG. 11 is an explanatory diagram of the process following FIG. 10, and FIG. 12 is a process following FIG. Explanatory drawing, FIG. 13 is an explanatory diagram of the process following FIG. 12, FIG. 14 is an explanatory diagram of the process following FIG. 13, FIG. 15 is an explanatory diagram of the process following FIG. 14, and FIG. 16 is an explanatory diagram of the process following FIG. 17, FIG. 17 is an explanatory diagram of the process following FIG. 16, FIG. 18 is an explanatory diagram of the process following FIG. 17, FIG. 19 is an explanatory diagram of the process following FIG. 18, and FIG. 20 is an explanatory diagram of the process following FIG. 21 is an explanatory diagram of the process following FIG. 20, FIG. 22 is an explanatory diagram of the process following FIG. 20, and FIG. 23 is an explanatory diagram of the process following FIG. 22.

As shown in these drawings, in the present embodiment, a case is shown in which a double-track railway elevated structure is constructed adjacent to the railway equipment T1 in operation laid on the road surface. That is, a case is shown in which the double-track railway facility T2 on the elevated railway structure is already in operation, the structure C is further constructed, a new double-track railway facility T3 is provided, and the railway facility T1 is relocated. There is. The reference numeral E is a train, and the alternate long and short dash line surrounding the train E indicates an occupied area of the train E (that is, an area where various structures should not be installed).

By the way, in the present embodiment, as shown in FIG. 10, first, a part of a new structure C is constructed with respect to the existing railway elevated structure. That is, using a large crane 61, a pillar Cp is constructed, a beam Cb is erected on the pillar Cp, and an elevated slab Cf which is an artificial ground is installed.

Since this process is accompanied by a large amount of noise, it is desirable to perform this step in the daytime work.

In the next step, as shown in FIG. 11, the first temporary pedestal 1 is installed on the pillar Cp of the structure C. Further, a second temporary gantry 2 is installed between the first temporary gantry 1. Further, a third temporary gantry 3 is installed in a place where the second temporary gantry 2 cannot be installed. In this step, the bracket member 10 is set in the retracted position. Note that FIG. 11 shows only the case where the first temporary gantry 1 is installed.

Since this process also involves a large amount of noise, it is desirable to perform the work in the daytime.

Here, as described above, in some temporary mounts, the direction in which the bracket member 10 rotates to the unfolded position is opposite to that of the other bracket members 10 in order to avoid interference with the external structure. Therefore, if the bracket members 10 of all the temporary pedestals (first to third temporary pedestals 1, 2, 3) are installed at the same predetermined height and rotated to the unfolded position in the subsequent process, the bracket members A case occurs in which 10s interfere with each other.

Therefore, only the bracket member 10 installed on the first temporary pedestal 1 is lifted to a predetermined height by the crane 60, and the bracket member 10 of the second temporary pedestal 2 and the third temporary pedestal 3 is first temporarily installed. Until the rotation work of the bracket member 10 of the gantry 1 is completed, it is installed at the lower part of the guide column 11, and after the rotation work of the first temporary gantry 1 is completed, it is lifted to a predetermined height by the crane 60 to perform the rotation work. To.

However, if the rotation directions of all the bracket members 10 are the same but they do not interfere with each other, or if some of the bracket members 10 do not interfere with each other because the rotation directions are reversed, it is not necessary to perform such an operation. After all the bracket members 10 of the first to third temporary mounts 1, 2 and 3 are lifted, they can be sequentially rotated to the deployed positions.

In this case, in the step shown in FIG. 14 described later, the work of rotating the bracket member 10 of the second temporary pedestal 2 and the third temporary pedestal 3 is eliminated.

The bracket member 10 of the first temporary pedestal 1 is lifted to a predetermined height by the crane 60, and then the hinge 12 is bolted to fix it to the guide support column 11. Bolting is performed by the worker H who rides on the basket 62a of the aerial work platform 62 using the bending and stretching type aerial work platform 62.

In the next step, as shown in FIG. 12, the electric wire W2, which is one of the existing energization equipments, is relocated to the support base MB supporting the truss beam M, and is also one of the existing energization equipments. The train line W3 is raised. This work is performed by, for example, a worker H riding on the lift 63a of the road-rail vehicle 63.

Since this process cannot be performed during the railway operating hours and is not accompanied by loud noise, the business line is closed outside the railway operating hours at night. Since the work is related to the feeder W2, etc., arrangements are made to stop the feeder.

In the next step, as shown in FIG. 13, the bracket member 10 of the first temporary gantry 1 is rotated to the unfolded position, and the train line W3 is replaced with the bracket member 10.

This process is also carried out by closing the business line outside the nighttime railway operating hours by arranging for the feeder to stop because it is not possible to work during the railway operating hours and there is no loud noise. ..

In this step, the holding jig 14 is removed and the bracket member 10 is rotated from the storage position to the deployment position. The rotation work is performed by the worker H pulling the kaishakunin rope 64 attached to the bracket member 10. At that time, the bracket member 10 is supported by the crane 60 to prevent it from falling. After rotating the bracket member 10 to the unfolded position, the hinge 12 is bolted to fix the guide column 11 and the bracket member 10 at the unfolded position.

The hinge 12 is bolted by the worker H who is on the basket 62a of the aerial work platform 62, as in the process of FIG. 11 described above.

When the bracket member 10 is in the unfolded position, the existing train line W3 that has been lowered is replaced with the bracket member 10.

In addition, for example, when the train line W3 does not exist above the train because the power is supplied from the third rail installed on the side of the railroad track, it is necessary to replace the train line W3 with the bracket member 10. If there is no, this step is not executed.

Further, since the noise generation can be suppressed by manually rotating the bracket member 10 including the bracket member 10 of the second temporary pedestal 2 and the third temporary pedestal 3 below. , It is desirable to perform the work at night.

In the next step, as shown in FIG. 14, the bracket member 10 of the second temporary pedestal 2 and the third temporary pedestal 3 is rotated to the unfolded position, and the truss beam M is removed.

As described above, the rotation of the bracket member 10 can be performed at night because the noise is suppressed, but the removal of the truss beam M is accompanied by noise, so it is desirable to perform this process during the daytime. ..

In this step, the bracket member 10 installed under the guide column 11 is lifted to a predetermined height by the crane 60, and the second temporary gantry is rotated in the same manner as when the bracket member 10 of the first temporary gantry 1 is rotated. The bracket member 10 of the second and third temporary pedestals 3 is rotated to the unfolded position. However, unlike the case of the bracket member 10 of the first temporary gantry 1, the train line is not replaced.

Further, the truss beam M supporting the overhead wire W2 and the train line W3 is cut and removed.

In FIG. 14, the second temporary pedestal 2 is shown, and the third temporary pedestal 3 is omitted in order to avoid complication of the drawings.

In the next step, as shown in FIG. 15, a floor girder 50a is erected between the bracket members 10 adjacent to each other of the first to third temporary pedestals 1, 2, and 3, and the pavement plate 50b is placed on the laying girder 50a. Install and erection the work floor 50. This completes the construction of the temporary scaffolding. In addition, a temporary handrail fence 51 is installed on the work floor 50.

That is, in the daytime work, the floor girder is lifted on the elevated slab Cf by the crane 60 and temporarily placed. Then, when all the bracket members 10 are in the deployed positions, the laying girder 50a is erected and welded on the bracket members 10 by using the crane 60 on the elevated slab Cf in the night work. At that time, for the purpose of curing sparks, the train line W3 passing nearby is covered with a spatter sheet (not shown).

From the place where the laying girder 50a is completed, in the night work, the pavement plate 50b is sequentially installed on the laying girder 50a by using the crane 60, and fixed to the laying girder 50a with the slip stopper. Further, the adjacent pavement plates 50b are also fixed to each other by using another slip stopper.

Further, in order to ensure work safety, a temporary handrail fence 51 is installed on the pavement plate 50b, which is the work floor 50.

In the next step, as shown in FIG. 16, the temporary handrail fence 51 is replaced with the support type handrail fence 52. That is, using the crane 60 on the elevated slab Cf, the support of the handrail fence is erected at the drilled portion of the floor girder 50a. After erection of the stanchions, a single horizontal pipe is attached, and a curing net and a baseboard are further attached to form a stanchion type handrail fence 52.

At that time, from the viewpoint of work efficiency, a mobile rolling scaffold 65 with wheels is used.

Since this process does not generate a large amount of noise, it is desirable to perform this process at night.

In the next step, as shown in FIG. 17, a structure C1 extending to the orbit is constructed. That is, a single pipe scaffold 66 is assembled on the work floor 50, and the steel girder Cb1 is erected so as to be connected to the beam Cb by using the crane 60 on the elevated slab Cf. Next, a girder lower surface formwork (not shown) is attached, reinforcing bars are arranged vertically and horizontally, and concrete is cast to construct an elevated slab Cf.

Since this process is accompanied by a large amount of noise, it is desirable to perform this step in the daytime work.

In the next step, as shown in FIG. 18, the support stand 4 for a single floor slab is assembled. Since this process is accompanied by a large amount of noise, it is desirable to perform this step in the daytime work. However, since the installation of the square lumber 43 and the top beam 44 and the erection of the floor girder 50a exceed the limit fence L and are in the existing track, it is desirable to perform the work at night.

In the next step, as shown in FIG. 19, the single-deck slab 46 is constructed between the single-deck slab receiving beam 45 and the single-deck slab receiving beam 45 (FIG. 9) installed opposite to each other. Since this process is accompanied by a large amount of noise, it is desirable to perform this step in the daytime work.

In the next step, as shown in FIG. 20, the crane 61 is used to remove the support stand 4 for the single-floor slab. Since this process is accompanied by a large amount of noise, it is desirable to perform this step in the daytime work. However, as in the case of assembling the support frame 4 for the single-floor slab, the removal of the square lumber 43, the top beam 44 and the floor girder 50a is performed at night because it exceeds the limit fence L and is in the existing track. Is desirable.

In the next step, as shown in FIG. 21, a home slab 53 or the like is constructed on the structure C. Since this process also involves a large amount of noise, it is desirable to perform the work in the daytime.

In the next step, as shown in FIG. 22, the home steel frame 54 and the inner facing wall 55 are installed. As a result, the skeleton of the new double-track railway facility T3 is formed. In addition, since this step also involves a large amount of noise, it is desirable to carry out the work in the daytime.

Then, in the next step, as shown in FIG. 23, the support type handrail fence 52, the floor girder 50a, and the pavement plate 50b are removed by using the bending and stretching type aerial work platform 62. Since this step exceeds the limit fence L and is in the existing track, it is desirable to perform it at night.

When the new double-track railway facility T3 is completed, the existing railway facility T1 laid on the road surface and the first to third temporary pedestals 1, 2 and 3 are removed to form a double-track railway elevated structure. The thing is completed.

As described above, according to the present embodiment, the bracket members 10 provided on the first to third temporary mounts 1, 2, and 3 can be raised and lowered along the guide columns 11, and the storage position and deployment. Since it is rotatable to the position, the temporary stand is assembled using the time zone (generally daytime) when there are relatively few restrictions on the work content, and the bracket member 10 is lifted to the storage position for work. A temporary pedestal can be installed by rotating the bracket member 10 and fixing it at the deployed position during a time period (generally at night) when the content is restricted.

That is, the work that was conventionally performed in a time zone in which the work content is restricted can be performed in a time zone in which the work content is less restricted. Then, the work in the time zone when the work content is restricted can be reduced, and the temporary pedestal can be installed efficiently.

As a result, the work during the time period when the work content is restricted is reduced, so that the temporary gantry (first to third temporary gantry 1, 2, 3) is efficiently installed even when the work content is restricted. Will be possible.

Further, since the bracket member 10 is rotated and fixed at the deployed position, the electric wire due to the fall of the suspended load or the collapse of the load, as in the case where the bracket member 10 is suspended from above the structure C and installed. It is possible to reduce the risk of damaging external structures such as W2, train line W3, and truss beam M.

Furthermore, when performing railway elevated construction directly above the railway equipment T1 that is laid on the road surface and is in operation, the construction is usually carried out by the temporary line method (a method in which a temporary track is installed during construction and the construction is carried out while operating). However, according to the present embodiment, it is not necessary to acquire the land for passing the temporary railroad track, so that the acquisition area can be reduced and the project cost can be reduced.

Although the invention made by the present inventor has been specifically described above based on the embodiments, the embodiments disclosed in the present specification are exemplary in all respects and are limited to the disclosed technology. is not it. That is, the technical scope of the present invention is not limitedly interpreted based on the description in the above-described embodiment, but should be interpreted according to the description of the claims, and the scope of claims. All changes are included as long as they do not deviate from the description technology and the technology equivalent to the above and the gist of the claims.

For example, in the present embodiment, the case where the present invention is applied to the construction of an elevated railway structure is shown, but the first temporary pedestal 1 and the second temporary pedestal 2 are used, or in addition to the first temporary pedestal 1. It can be applied to the construction of various structures using the temporary gantry 3 of 3.

Further, the anchor bolts for fixing the guide columns 11 of the first temporary pedestal 1 to the columns Cp may be embedded after the columns Cp are constructed. Similarly, anchor bolts for fixing the support pedestal 22 of the second temporary pedestal 2 and the support pedestal 32 of the third temporary pedestal 3 to the concrete foundations 21 and 31 may be embedded after the construction of the concrete foundation.

In the above description, the case where the present invention is applied to the construction of an elevated railway structure is shown, but the present invention is not limited to this, and as described above, it can be applied to the construction of various structures. can.

1 First temporary stand (temporary stand)
2 Second temporary stand (temporary stand)
3 Third temporary stand (temporary stand)
4 Single-deck support stand 10 Bracket member 10a Vertical lumber 10b Horizontal lumber 10c Diagonal lumber 11 Guide strut 11a Slide flange 12 Hinge 12a Rotation side plate 12b Mounting side plate 13 Slide guide plate 14 Holding jig (rotation prevention cure) Ingredients)
21 Concrete foundation 22 Support pedestal 22a pedestal foundation beam 22b pedestal support 22c Horizontal member 22d Slanted material 31 Concrete foundation 32 Support pedestal 32a gantry foundation beam 32b pedestal support 32c Horizontal material 32d Slanted material 41 Concrete foundation 42 Support pedestal 42 pedestal support 42a Foundation beam 42b pedestal support 42c horizontal material 42d diagonal material 43 square cane material 44 top beam 45 beam 46 single floor slab 50 work floor 50a floor girder 50b pavement board 51 temporary handrail fence 52 support type handrail fence 53 home slab 54 home upper house steel frame 55 inside Opposing walls 60, 61 Crane 62 High-altitude work vehicle 62a Basket 63 Railroad vehicle 63a Lift 64 Interlaced rope 65 Rolling scaffold 66 Single pipe scaffold C Railroad elevated structure, structure C1 Structure Cb Beam Cb1 Steel girder Cf Elevated slab (artificial) ground)
Cp Pillar E Train H Worker L Limit fence M Truss beam MB Support base P Platform R Rotation center T1 Railway equipment T2 Railway equipment T3 Railway equipment W1 Suspension line W2 Overhead line W3 Train line

Claims (8)

It is a temporary pedestal row installed on a skeleton composed of a plurality of pillars provided at predetermined intervals and artificial ground erected on the plurality of pillars.
A first temporary pedestal having a guide column attached to at least a part of the columns in the vertical direction, and a bracket member installed so as to be able to move up and down and rotate along the guide column via a hinge. ,
A support pedestal installed between the plurality of columns, a guide stanchion attached to the support pedestal in the vertical direction, and a rotatably installed along the guide stanchion via a hinge. A second temporary pedestal with a bracket member
Have,
The bracket member of the first temporary pedestal and the bracket member of the second temporary pedestal can be rotated to a storage position along the extending direction of the skeleton and a deployment position protruding outward of the skeleton. Has become
Temporary pedestal row characterized by this. A support pedestal installed between the plurality of pillars and having a height lower than that of the support pedestal of the second temporary pedestal, and a support pedestal attached to the support pedestal in the vertical direction and having an upper portion thereof. Further having a third temporary pedestal having a guide stanchion protruding upward from the ridge and a bracket member rotatably and vertically installed along the guide stanchion via a hinge.
The bracket member of the third temporary gantry is rotatable to a storage position along the extending direction of the skeleton and a deployment position protruding outward from the skeleton.
The temporary gantry row according to claim 1. Further having an anti-rotation jig for preventing rotation of the bracket member at the storage position.
The temporary gantry row according to claim 1 or 2. The bracket member is coated with insulation.
The temporary gantry row according to any one of claims 1 to 3. The rotation directions of the bracket members from the storage position to the deployment position in some of the adjacent temporary mounts are opposite to each other.
The temporary gantry row according to any one of claims 1 to 4. A method for constructing a temporary scaffold using the temporary pedestal row according to any one of claims 1 to 5.
The process of installing the bracket member of each temporary pedestal in the retracted position at the lower part of the guide column, and
A process of lifting the bracket member to a predetermined height along the guide support by a crane and fixing the bracket member to the guide support.
A step of rotating the bracket member fixed to the guide support at a predetermined height from the storage position to the deployment position and fixing the bracket member at the deployment position.
The process of erection of the work floor on the bracket member in the unfolded position, and
A method of constructing a temporary scaffold, which is characterized by executing. A method for constructing a temporary scaffold using the temporary pedestal row according to any one of claims 1 to 5.
The process of installing the bracket member of each temporary pedestal in the retracted position at the lower part of the guide column, and
A step of lifting the bracket member of the first temporary pedestal by a crane to a predetermined height along the guide support and fixing it to the guide support.
A step of rotating the bracket member of the first temporary pedestal fixed to the guide support at a predetermined height from the storage position to the deployment position and fixing the bracket member at the deployment position.
A step of lifting the bracket member of the temporary pedestal other than the first temporary pedestal by a crane to a predetermined height along the guide stanchion and fixing it to the guide stanchion.
A step of rotating the bracket member of the temporary pedestal other than the first temporary pedestal fixed to the guide support at a predetermined height from the storage position to the unfolding position and fixing the bracket member at the unfolding position.
The process of erection of the work floor on the bracket member in the unfolded position, and
A method of constructing a temporary scaffold, which is characterized by executing. After executing the step of rotating the bracket member of the first temporary gantry to the unfolding position and fixing the bracket member at the unfolding position, the bracket member of the temporary gantry other than the first temporary gantry is set at a predetermined height. Before performing the step of fixing to the guide column,
A step of replacing the existing energization equipment with the bracket member of the first temporary pedestal is executed.
The method for constructing a temporary scaffold according to claim 7, wherein the temporary scaffold is constructed.

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