JP2018131877A - Installation method of precast member, temporary presser - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an installation method of a precast member or the like, capable of easily installing the precast member.SOLUTION: An anchor bolt 3 which is fixed to a ground covering part 2 of a floor slab of a highway bridge and the like is passed through a hole 111 on an undersurface of a recess 11 of a precast member 10, and the precast member 10 is arranged on the ground covering part 2 via a frame body 4 with elasticity. Then, a temporary presser 20 is arranged on the undersurface of the recess 11 of the precast member 10 through the anchor bolt 3 into its opening 211. Then, on the top surface of the temporary presser 20, a nut 24 is fastened through a washer 23 to the anchor bolt 3. Then, a solidification material is injected into the hole 111 of the precast member 10 to fill the space between the precast member 10 and the ground covering part 2 with the solidification material. A space 30 opened to the lateral side is formed between the hole 111 of the precast member 10 and the top surface of the temporary presser 20.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a method for installing a precast member and a temporary presser used therefor.

  On both sides of floor slabs such as road bridges and railway bridges, rails are provided to prevent people and objects from falling, blindfolding, and soundproofing. This handrail is sometimes constructed by installing a precast member made of FRP (fiber reinforced plastic) or the like, and can shorten the work period or the like (see Patent Document 1).

  For example, the precast member is disposed on the ground cover portion provided on both sides of the floor slab via the elastic member, and at this time, the anchor bolt protruding from the ground cover portion is inserted into the hole of the precast member. A washer is passed through the upper end of the anchor bolt, and a nut is tightened. By tightening the nut, the height and construction (posture) of the precast member are adjusted and temporarily fixed.

  Then, it becomes the procedure of filling solidifying materials, such as a non-shrink mortar, between a precast member and a ground cover part, and a precast member is fixed by solidification of a solidifying material.

JP 2009-074304

  In consideration of filling properties and the like, it is preferable to inject the solidified material from the hole of the precast member. For this purpose, it is necessary to remove the washer and the nut once to release the temporary fixing. There is a risk of madness. In that case, it becomes necessary to readjust the height of the precast member, and it takes time to install the precast member.

  This invention is made | formed in view of said problem, and it aims at providing the installation method of the precast member etc. which can install a precast member easily.

  1st invention for solving the subject mentioned above is an installation method which installs a precast member on an object surface, a bolt fixed to the object surface is passed through a hole of the precast member, and the precast member is installed. A step of placing the elastic member on the target surface, a step of passing the bolt through the insertion portion of the temporary pressing tool, and a step of arranging the temporary pressing tool on the surface of the precast member provided with the hole; A step of tightening a temporary fastener to the bolt on the upper surface of the temporary pressing tool, and a solidifying material is injected into the hole of the precast member to fill the solidified material between the precast member and the target surface. A space opened laterally is formed between the hole of the precast member and the upper surface of the temporary presser, and the solidifying material is injected from the space. A method of installing precast members.

  According to the present invention, by using the temporary pressing tool as described above, the adjustment of the height and the like of the above-mentioned precast member and temporary fixing can be performed in a state where the solidification material can be injected from the hole of the precast member. Therefore, it is not necessary to release the temporary fixing of the precast member at the time of injecting the solidifying material, and it is not necessary to readjust the height or the like. As a result, the work procedure is reduced and the process is simplified, so that the installation time of the precast member can be greatly shortened, and the safety of the worker is improved.

After the solidified material is solidified, it is desirable to remove the temporary fastener, remove the temporary retainer, and tighten the fastener to the bolt.
Since the precast member is fixed by solidifying the solidifying material, the temporary fastener can be removed and the temporary retainer can be removed, and the temporary fastener and the temporary retainer can be diverted.

It is desirable that a plurality of the temporary pressers are arranged on the plane of the precast member, the bolts are passed through the insertion portions of the temporary pressers, and the temporary fasteners are fastened to the bolts.
It is possible to adjust the posture of the precast member by adjusting the tightening of the temporary fastener in each of the bolts passed through the insertion portions of the plurality of temporary pressers.

It is desirable that the temporary pressing tool has a plurality of insertion portions in a plane, the bolts are passed through the insertion portions, and the temporary fasteners are tightened into the bolts.
It is possible to adjust the posture of the precast member by adjusting the tightening of the temporary fastener in each of the bolts passed through the plurality of insertion portions of the temporary presser.

It is desirable that a concave portion is provided on a side surface of the precast member, the hole of the precast member is provided on a lower surface of the concave portion, and the temporary pressing tool is disposed on a lower surface of the concave portion.
Thereby, a series of work concerning installation of a precast member can be easily performed from the side of a precast member.

The temporary pressing tool preferably includes a top plate and side plates provided on both sides of the top plate, and an opening which is the insertion portion is formed in the top plate.
Thereby, a temporary pressing tool becomes a simple structure, and it can manufacture easily by processing a steel plate etc., and becomes low-cost.

The precast member preferably constitutes a balustrade.
Thereby, it becomes possible to easily construct rails such as road bridges and railway bridges by installing precast members.

  A second invention is a temporary pressing tool for temporarily pressing a precast member disposed on an object surface via an elastic member, and is a bolt fixed to the object surface and passed through a hole of the precast member. When the temporary pressing tool is disposed on the surface of the precast member on the surface provided with the hole, the temporary hole and the temporary hole are inserted into the insertion portion. The temporary pressing tool is characterized in that a space opened laterally is formed between the upper surface of the pressing tool.

  According to the present invention, it is possible to provide a method for installing a precast member and the like that can easily install the precast member.

The figure which shows the handrail 100 by the precast member 10. FIG. The figure explaining the installation method of the precast member. The figure explaining the installation method of the precast member. The figure which shows the temporary pressing tool 20. FIG. The figure explaining the installation method of the precast member. The figure explaining the installation method of the precast member. The figure which shows temporary pressing tool 20a, 20b, 20c. The figure which shows the temporary pressing tool 20d. The figure shown about the space 30a.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

(1. Handrail 100)
FIG. 1A is a view showing a rail 100 constituted by the precast member 10, and FIG. 1B is a view showing a vertical section of the concave portion 11 of the precast member 10. The same applies to FIGS.

  The handrail 100 is constructed by arranging a plurality of precast members 10 side by side on the ground covering portions 2 (target surfaces) on both sides of the floor slab 1 in a road bridge, a railway bridge, or the like. The precast member 10 is a resin hollow member using FRP or the like, and is light and high in strength and can be installed by human power. However, the precast member 10 may be a solid member, a concrete member, or the like.

  The precast member 10 is arrange | positioned on the ground cover part 2 via the frame 4 by an elastic member. For the frame 4, for example, a resin such as foamed polyethylene foam can be used. However, it is not limited to this as long as it has moderate elasticity.

  The frame body 4 is disposed at both ends in the thickness direction of the precast member 10 so as to be continuous in the width direction of the precast member 10. The thickness direction of the precast member 10 corresponds to the left-right direction in FIG. The width direction of the precast member 10 is a direction orthogonal to the thickness direction of the precast member 10 in a plane.

  A solidified material 5 is filled between the bottom surface of the precast member 10 and the top surface of the ground covering portion 2. The solidifying material 5 is filled inside the frame body 4. Non-shrink mortar or the like can be used for the solidifying material 5, but is not limited thereto.

  A recess 11 is provided in the lower part of the side surface of the precast member 10. In the present embodiment, a plurality of recesses 11 are provided in the width direction of the precast member 10 in the plane.

  A plurality of holes 111 are provided in the thickness direction of the precast member 10 on the lower surface of each recess 11. These holes 111 penetrate between the lower surface of the recess 11 of the precast member 10 and the bottom surface of the precast member 10.

  In the example of FIG. 1, two recesses 11 are provided in one precast member 10, and two holes 111 are arranged in each recess 11. Accordingly, a total of four holes 111 are provided in the precast member 10, and anchor bolts 3 (bolts) fixed to the ground covering portion 2 of the floor slab 1 are passed through these holes 111. The lower part of each anchor bolt 3 is embed | buried in the concrete of the ground covering part 2 and the floor slab 1 under it.

  A washer plate 12 (hereinafter referred to as a plate) having an opening 121 is disposed on the lower surface of the recess 11 of the precast member 10. The anchor bolt 3 protrudes upward through the hole 111 of the precast member 10 and the opening 121 of the plate 12. By tightening a nut 14 (fastener) through a washer 13 such as a square washer to the protruding portion of the anchor bolt 3, the precast member 10 is securely fixed to the ground covering portion 2 of the floor slab 1. A double nut or the like is used for the nut 14 to prevent loosening, but is not limited thereto.

(2. Installation method of the precast member 10)
Next, the installation method of the precast member 10 which concerns on embodiment of this invention is demonstrated.

  In the present embodiment, first, as shown in FIG. 2, the precast member 10 is arranged on the ground covering portion 2 via the frame body 4. At this time, the protruding portion of the anchor bolt 3 protruding from the ground covering portion 2 is passed through the hole 111 provided on the lower surface of the concave portion 11 of the precast member 10.

  Thereafter, as shown in FIG. 3, the temporary presser 20 is disposed on the lower surface of the recess 11 of the precast member 10. In the present embodiment, the temporary presser 20 is disposed in each of the plurality of (two in the illustrated example) recesses 11 of the precast member 10. That is, a plurality of temporary pressers 20 are arranged on the plane of the precast member 10.

  FIG. 4 is a view showing the temporary holding tool 20. The temporary presser 20 is manufactured by processing a metal member such as a steel plate, and includes a substantially rectangular top plate 21 and side plates 22.

  The top plate 21 is provided with a plurality of (two in the illustrated example) openings 211 in a plane. These openings 211 are insertion portions through which the anchor bolts 3 are passed, and as shown in FIG. 3B, the protruding portions of the anchor bolts 3 protruding from the holes 111 into the openings 211 of the top plate 21. Is passed.

  The side plates 22 are provided on both sides of the top plate 21. The lower end of the side plate 22 is bent outwardly in a hook shape, and this bent portion is placed on the lower surface of the recess 11 of the precast member 10.

  After arranging the temporary presser 20 in this way, the planar position of the precast member 10 is adjusted as necessary, and the anchor protruding from the opening 211 on the upper surface of the temporary presser 20 as shown in FIG. A washer 23 is passed through the protruding portion of the bolt 3 and a nut 24 (temporary fastener) is tightened. Thereby, the precast member 10 is pressed downward via the temporary pressing tool 20.

  The frame 4 contracts as the precast member 10 is pressed, and the height of the precast member 10 is adjusted by adjusting the tightening of the nut 24. The pressing force from the nut 24 is transmitted from the bent portion of the side plate 22 of the temporary pressing tool 20 to the precast member 10 by a surface, and no force is locally applied to the precast member 10.

  By adjusting the tightening of the nut 24 to the anchor bolt 3 as described above at the two concave portions 11 (see FIG. 3 and the like) in the width direction of the precast member 10, the posture (inclination) of the precast member 10 in the width direction is adjusted. Can be adjusted. Moreover, in each recessed part 11, the attitude | position (inclination) of the thickness direction of the precast member 10 can be adjusted by adjusting tightening of the nut 24 with respect to the two anchor bolts 3 of the thickness direction of the precast member 10. FIG.

  Thus, by adjusting the tightening of the nut 24, not only the height of the precast member 10 but also the erection (posture) of the precast member 10 can be adjusted. The precast member 10 is temporarily fixed by the pressing force from the nut 24 and the repulsive force of the frame body 4 contracted with the pressing of the precast member 10.

  In the present embodiment, when the temporary presser 20 is disposed on the lower surface of the recess 11 of the precast member 10, as shown in FIG. 5B, the hole 111 of the precast member 10 and the upper surface of the temporary presser 20 A space 30 is formed between the two. This space 30 is open to the side as shown by the arrow, and the hole 111 of the precast member 10 communicates with the outside of the temporary presser 20 through this space 30.

  Using a watering can or the like, the solidified material 5 is injected into the hole 111 of the precast member 10 from the space 30 as shown in FIG. 6A, and the solidified material 5 is filled between the precast member 10 and the ground cover portion 2. be able to. The solidified material 5 is filled until reaching the upper end of the hole 111. Confirmation that the solidifying material 5 is filled up to the upper end of the hole 111 can be performed by visual recognition from the outside. In this embodiment, since the solidifying material 5 is filled in order, the filling property of the solidifying material 5 is good.

  Since the precast member 10 is fixed when the solidified material 5 is solidified, the washer 23 and the nut 24 are removed, and the temporary presser 20 is removed as shown in FIG.

  Then, as shown in FIG. 6C, the plate 12 is placed on the opening 121 through the anchor bolt 3 on the lower surface of the recess 11, and the washer 13 is passed through the washer 13 to the protruding portion of the anchor bolt 3 protruding from the opening 121. The nut 14 is tightened. Thereby, the precast member 10 is reliably fixed to the ground covering portion 2 of the floor slab 1.

  As described above, according to the present embodiment, by using the temporary holding tool 20 as described above, the solidified material 5 can be injected from the hole 111 for adjusting and temporarily fixing the height and the building of the precast member 10. It can be done in a state. Therefore, it is not necessary to release the temporary fixing of the precast member 10 at the time of injecting the solidifying material 5, and it is not necessary to readjust the height and the building.

  As a result, since the work procedure is reduced and the process is simplified, the installation time of the precast member 10 can be greatly shortened, and the safety of the worker is improved. In addition, there is an advantage that confirmation of filling of the solidifying material 5 can be easily performed by visual recognition from the outside.

  Further, in the present embodiment, the precast member 10 is fixed by solidifying the solidifying material 5, so that after the solidifying material 5 is solidified, it is possible to remove the washer 23 and the nut 24 and remove the temporary presser 20. The washer 23, the nut 24, and the temporary pressing tool 20 can be diverted.

  Further, in the present embodiment, as described above, a plurality of temporary pressers 20 are arranged on the plane of the precast member 10, and the nuts 24 are fastened to the anchor bolts 3 passed through the openings 211 of these temporary pressers 20. It is possible to adjust the posture in the width direction of the precast member 10 by performing the adjustment.

  Each temporary holding tool 20 is formed with a plurality of openings 211, and by adjusting the tightening of the nut 24 with respect to the anchor bolt 3 passed through each of the plurality of openings 211, the precast member 10. It is also possible to adjust the posture in the thickness direction.

  Moreover, in this embodiment, in the recessed part 11 of the side surface of the precast member 10, a series of operation | work which concerns on installation of the precast member 10, such as installation of the temporary pressing tool 20, adjustment of the height etc. of the precast member 10, temporary fixation, etc. is performed. It can be easily performed from the side of 10.

  Moreover, since the temporary pressing tool 20 has a simple structure constituted by the top plate 21 and the side plate 22 as described above, it can be easily manufactured by processing a steel plate or the like and is low in cost.

  In the present embodiment, the precast member 10 constitutes the handrail 100 of the floor slab 1, and the handrail 100 can be easily constructed by installing the precast member 10.

  However, the present invention is not limited to this. For example, the shape of the precast member 10 is not limited to that described above, and any shape can be used as long as the temporary presser 20 can be disposed on the surface on which the hole 111 for passing the anchor bolt 3 is provided.

  Moreover, although the example which constructs the handrail 100 by the precast member 10 was demonstrated in this embodiment, this invention is not restricted to this, It is possible to apply when constructing various structures by the precast member 10. is there.

  In the present embodiment, the anchor bolt 3 embedded in the ground cover 2 of the floor slab 1 is used for adjusting the height of the precast member 10, but the bolt used for adjusting the height is not limited to this. Anything can be used as long as it is fixed to the ground covering portion 2.

  Also, the temporary presser is not limited to the above. 7-9 is a figure explaining the example of another temporary pressing tool. For example, the temporary presser 20a in FIG. 7A is different from the temporary presser 20 described above in that the lower end of the side plate 22a is bent inwardly in a hook shape. This temporary presser 20a has an advantage that it can be easily manufactured by simply cutting a part of a rectangular tubular steel pipe into a slit shape.

  The temporary pressing tool 20b shown in FIG. 7B is different from the temporary pressing tool 20 described above in that the side plate 22b is inclined so as to go outward as it goes downward. When this temporary pressing tool 20b is used, there is an advantage that the width of the space 30 described above is widened and the operation of injecting the solidifying material 5 is facilitated.

  7C, the end plate 25 is provided on the end surface surrounded by the top plate 21a and the side plates 22 on both sides thereof, and the slit-shaped opening 212 is provided in the middle portion of the top plate 21a. It is done. The temporary pressing tool 20c is strong as a whole, and can prevent deformation or the like when the nut 24 is tightened. Also, the solidifying material 5 can be poured from the space 30 by inserting a watering can into the opening 212.

  On the other hand, the temporary pressing tool 20d shown in FIG. 8A has a main body using a steel plate having a predetermined thickness provided with a penetrating portion 26 (an insertion portion for the anchor bolt 3) that vertically penetrates the main body. In this example, as shown in FIG. 8B, the temporary pressing tool 20d is disposed on the lower surface of the concave portion 11 of the precast member 10 through the anchor bolt 3 through the penetration portion 26, as shown in FIG. 9A. Then, the nut 24 is tightened through the washer 23 through the anchor bolt 3 on the upper surface of the main body.

  Also in this example, when the temporary presser 20d is arranged on the lower surface of the recess 11 of the precast member 10, as shown in FIG. 9B, the hole 111 of the precast member 10 and the upper surface of the temporary presser 20d A space 30a is formed between them. This space 30a is also open to the side as shown by the arrow, and the hole 111 of the precast member 10 communicates with the outside through the space 30a. The operation of injecting the solidifying material 5 can be performed from the space 30a in the same manner as described above.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to such examples. It will be apparent to those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea disclosed in the present application, and these are naturally within the technical scope of the present invention. Understood.

1: floor slab 2: ground cover 3: anchor bolt 4: frame 5: solidified material 10: precast member 11: recess 12: washer plate 13, 23: washer 14, 24: nuts 20, 20a, 20b, 20c, 20d: Temporary presser 21, 21a: Top plate 22, 22a, 22b: Side plate 25: End plate 26: Through part 30, 30a: Space 100: High column 111: Holes 121, 211, 212: Opening

Claims (8)

An installation method for installing a precast member on a target surface,
Passing a bolt fixed to the target surface through the hole of the precast member, and disposing the precast member on the target surface via an elastic member;
Passing the bolt through the insertion part of the temporary pressing tool, and placing the temporary pressing tool on the surface of the precast member provided with the hole;
Tightening a temporary fastener on the bolt on the upper surface of the temporary presser;
Injecting a solidifying material into the hole of the precast member to fill the solidifying material between the precast member and the target surface;
Have
An installation method of a precast member, wherein a space opened laterally is formed between the hole of the precast member and the upper surface of the temporary pressing tool, and the solidifying material is injected from the space.   The precast member installation method according to claim 1, wherein after the solidifying material is solidified, the temporary fastener is removed, the temporary retainer is removed, and the fastener is fastened to the bolt. A plurality of the temporary pressing tools are arranged in the plane of the precast member,
The bolt is passed through the insertion part of each temporary presser,
The precast member installation method according to claim 1, wherein the temporary fastener is fastened to each bolt. The temporary pressing tool has a plurality of insertion portions in a plane,
The bolt is passed through each insertion part,
The precast member installation method according to any one of claims 1 to 3, wherein the temporary fastener is fastened to each bolt. A concave portion is provided on a side surface of the precast member,
The hole of the precast member is provided on the lower surface of the recess,
The said temporary pressing tool is arrange | positioned on the lower surface of the said recessed part, The installation method of the precast member in any one of Claims 1-4 characterized by the above-mentioned. The temporary presser is
With the top plate,
Side plates provided on both sides of the top plate;
Have
The opening method which is the said insertion part in the said top plate was formed, The installation method of the precast member in any one of Claims 1-5 characterized by the above-mentioned.   The said precast member comprises a handrail, The installation method of the precast member in any one of Claims 1-6 characterized by the above-mentioned. A temporary pressing tool for temporarily pressing a precast member arranged on an object surface via an elastic member,
An insertion portion for passing a bolt fixed to the target surface and passed through a hole of the precast member;
When the temporary pressing tool is disposed on the surface of the precast member through the bolt through the insertion portion, the side between the hole of the precast member and the upper surface of the temporary pressing tool is provided. A temporary presser characterized in that an open space is formed.

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