JP6673751B2 - Installation method of fixing device and structure - Google Patents

Description

  The present invention provides a fixing device for fixing a structure to a main body structure in a state where an anchor member of the structure is inserted into an anchor hole formed in the main body structure, and a structure using the fixing device. The present invention relates to a method for constructing a structure disposed on a main body structure.

Generally, a bearing for supporting a bridge girder is installed above an abutment or a pier.
Such a support is provided with a plurality of anchor bolts extending downward, and a plurality of anchor holes corresponding to the anchor bolts of the support are formed on the upper surface of the abutment or pier. Some anchor bolts are inserted into the anchor holes to temporarily fix the bearing on the abutment / pier, and then mortar is cast and the bearing is permanently fixed on the abutment / pier (for example, See Patent Document 1.).

East Japan Railway Company / Tohoku Construction Office “Tohoku Construction Technical Report”, 2014 vol.24 (February 2016), pp. 417-418

However, when the support 50 is temporarily fixed on the main body structure B by the construction method of Non-Patent Document 1, as shown in FIG. A stopper 80 sandwiched from above is fixed on the main structure B by a post-installed anchor 90. Note that a filling material 81 is interposed between the stopper 80 and the support 50.
As described above, the main structure B is damaged because the post-installation anchor 90 is driven, and the scratches cause corrosion. Further, in order to prevent the scratch from causing corrosion, the work of filling the scratch with a non-shrink mortar or performing anticorrosion coating has been conventionally performed.

  An object of the present invention is to insert an anchor member of a structure into an anchor hole formed in a main body structure, and to arrange a structure such as a bridge girder in the main body structure without damaging the main body structure. Another object of the present invention is to provide a fixing device and a construction method of a structure capable of securing a proof strength against a horizontal force during an earthquake.

In order to achieve the above object, one invention according to the present application is:
A structure in which a plurality of columnar anchor members extending downward in parallel with each other is provided, and a plurality of anchor holes having a diameter larger than the anchor members are formed corresponding to the plurality of anchor members. A fixing device used for fixing to a main body structure,
A first device having an outer diameter substantially the same as the diameter of the anchor hole, and a cylindrical through hole provided at an eccentric position;
A second instrument having an outer diameter substantially the same as the diameter of the through hole, and a cylindrical insertion hole having an inner diameter substantially the same as the diameter of the anchor member is provided at an eccentric position,
With
The second device is configured by a plurality of divided bodies divided along a plane parallel to an axis so as to vertically divide the insertion hole, and the plurality of divided bodies are configured such that the anchor member is the second divided body. The device can be assembled around the anchor member so as to be inserted into the insertion hole of the device.

When the structure is temporarily fixed to the main structure using the fixing device having such a configuration, first, a first device is installed in an anchor hole of the main structure, and an anchor member of the structure is inserted through a through hole of the first device. Into the anchor hole. Next, the plurality of divided bodies are assembled around the anchor member, and the second device in a state where the anchor member is inserted through the insertion hole is installed in the through hole of the first device.
Here, since the through hole of the first device is located at an eccentric position and the insertion hole of the second device is located at an eccentric position, the center of the anchor member inserted into the anchor hole is determined in any direction from the center of the anchor hole. Even if it is within a predetermined range (for example, the sum of the amount of eccentricity of the through hole and the amount of eccentricity of the insertion hole), by appropriately adjusting the orientation and arrangement of the first instrument and the second instrument, The first device and the second device can be installed between the anchor hole and the anchor member.
The movement of the anchor member can be restricted by the fixing device obtained by integrating the first device and the second device thus installed.
That is, the fixing device attached between the anchor hole and the anchor member regulates the movement of the anchor member, so that the structure can be temporarily fixed to the main body structure.

In this way, if the fixing device restricts the movement of the anchor member and temporarily fixes the structure to the main structure, the structure is temporarily fixed to the main structure while securing the strength against the horizontal force during an earthquake. can do.
In addition, when this fixing device is attached between the anchor hole and the anchor member, there is no need to use a fixing member such as a post-installed anchor, so that the main body structure is not damaged, and the main body structure as in the prior art is not used. The troublesome work of repairing the damage of the object can be omitted.

Also, preferably,
The second device is provided with an injection port oriented along the insertion hole.

When the second device is provided with an injection port oriented along the insertion hole, the filler is injected into the anchor hole from the injection port with the second device installed in the through hole of the first device installed in the anchor hole. Can be set up.
That is, it is possible to attach a fixing device between the anchor hole and the anchor member, drive the filler into the anchor hole in a state where the structure is temporarily fixed to the main structure, and permanently fix the structure to the main structure. Will be possible.

Also, preferably,
On the upper end side of the first device, a first flange portion having a diameter larger than the anchor hole is provided,
On the upper end side of the second instrument, a second flange portion having a diameter larger than the through hole is provided,
The first flange portion is provided with a notch for forming a gap with the main body structure, and the second flange portion is formed with a notch for forming a gap between the first instrument and the first instrument. Make sure notches are provided.

If a notch is provided in the first flange portion to form a gap between the first flange portion and the main body structure, a tool such as a bur may be pryed into the gap to form the main body structure. Since it is easy to pull up the first device installed in the anchor hole, it is easy to adjust the orientation of the first device once installed.
Similarly, if a notch is provided in the second flange portion so as to form a gap between the second flange portion and the first instrument, a tool such as a bur can be pryed into the gap, and the like. Since it is easy to pull up the second device installed in the through hole of one device, it is easy to adjust the orientation of the second device once installed.

Further, other inventions according to the present application are:
It is a construction method of the structure which arrange | positions the said structure to the said main-body structure using the fixing fixture of Claim 1, Comprising:
A first step of installing the first device in the anchor hole;
A second step of inserting an anchor member of the structure into the anchor hole through a through hole of the first device;
A third step of installing the second device obtained by assembling the plurality of divided bodies around the anchor member in a through hole of the first device;
A fourth step of placing a filler between the main structure and the structure to fix the structure to the main structure;
Was prepared.

According to the construction method of this configuration, if the fixing device is attached so that the first device and the second device are installed between the anchor hole and the anchor member, the structure is attached to the main body structure so as to restrict the movement of the anchor member. Can be temporarily fixed.
If the movement of the anchor member can be regulated by the fixing device installed in this way, the structure can be temporarily fixed to the main body structure in a state where the strength against the horizontal force at the time of the earthquake is secured.
Then, in a state where the structure is temporarily fixed to the main body structure, a filler is poured between the main body structure and the structure, and the structure can be permanently fixed to the main body structure.
Also, when the fixing device is installed between the anchor hole and the anchor member, the fixing member such as a post-installed anchor is not used, and the main structure is not damaged. The troublesome work of repairing the damage of the object can be omitted.

Also, preferably,
Between the second step and the third step, a step of installing a predetermined structure on the structure, and a step of adjusting the orientation of the first device after installing the predetermined structure. I do.

For example, when the weight of the structure acts on the structure due to the installation of the predetermined structure on the structure, the structure may be slightly deformed such as bending. When the structure is deformed, the arrangement of the anchor member through the through hole shifts. Therefore, after the predetermined structure is installed on the structure, the orientation of the first device is adjusted, and the second device is moved to the second process in the subsequent step. 1. Make sure that the equipment can be properly installed.
When a plurality of columns such as continuous columns are erected, it is possible to set a stage where several columns are erected, or after all the columns are erected, to set the positions of the front and rear columns appropriately.
By doing so, it is possible to suitably perform the construction of disposing the structure on the main body structure.

Also, preferably,
The second device is provided with an inlet that communicates with the anchor hole in a state where the second device is installed in a through hole of the first device,
The fourth step includes a step of driving the filler into the anchor hole from the inlet.

  If the second device is provided with an injection port leading to the anchor hole with the second device installed in the through hole of the first device, the injection is performed with the first device or the second device installed at a predetermined location. Since the filler can be poured into the anchor hole from the entrance, it is possible to suitably perform the construction of disposing the structure on the main body structure.

  According to the present invention, when an anchor member of a structural body is inserted into an anchor hole formed in the main structural body, and the structural body is disposed in the main structural body, the main structural body is not damaged during an earthquake. Thus, the structure can be fixed to the main body structure while securing the strength against the horizontal force.

It is a perspective view which shows the fixing device of this embodiment. It is a top view (a) showing the second device of the fixing device, and a top view (b) showing the first device of the fixing device. It is the side view (a) which shows the 2nd device of a fixing device, and the side view which shows the 1st device of a fixing device (b). It is a top view (a) and (b) which show one mode of the fixing device which unifies the 1st device and the 2nd device. It is explanatory drawing which shows the procedure of the construction method of arranging a bearing in a main body structure. It is explanatory drawing which shows the procedure of the construction method of arranging a bearing in a main body structure. It is explanatory drawing which shows the procedure of the construction method of arranging a bearing in a main body structure. It is explanatory drawing which shows the procedure of the construction method of arranging a bearing in a main body structure. It is explanatory drawing which shows the procedure of the construction method of arranging a bearing in a main body structure. It is explanatory drawing which shows the state which fixed the bearing to the main-body structure by the construction method of a prior art.

  Hereinafter, with reference to drawings, an embodiment of a fixing device and a method of constructing a structure according to the present invention will be described in detail. However, the embodiments described below are provided with various technically preferable limits for carrying out the present invention, but the scope of the present invention is not limited to the following embodiments and illustrated examples.

FIG. 1 is a perspective view showing a fixing device 100 of the present embodiment.
FIG. 2A is a top view showing the second device 20 of the fixing device 100, and FIG. 2B is a top view showing the first device 10 of the fixing device 100.
FIG. 3A is a side view showing the second device 20 of the fixing device 100, and FIG. 3B is a side view showing the first device 10 of the fixing device 100.
The fixing device 100 temporarily attaches the support 50 to the main structure B in a state where the anchor member 51 of the support 50 as a structure is inserted into an anchor hole H formed in the main structure B such as an abutment or a pier. It is an instrument used to fix.
Note that the anchor hole H of the main structure B has a cylindrical shape, and the anchor member 51 of the support 50 has a cylindrical shape.

The fixing device 100 of the present embodiment includes a first device 10 and a second device 20, as shown in FIGS. In other words, the fixing device 100 is a combination of the first device 10 and the second device 20.
The first device 10 and the second device 20 are made of a metal material, and are made of steel in the present embodiment.

The first instrument 10 has an instrument body 11 having an outer diameter substantially the same as the diameter of the anchor hole H, and a first flange portion 12 having a larger diameter than the instrument body 11 and provided at an upper end of the instrument body 11. And a cylindrical through-hole 13 provided at an eccentric position of the column-shaped instrument main body 11.
The first flange portion 12 is provided with a notch 12a for forming a gap between the first instrument 10 and the main body structure B in a state where the first instrument 10 is installed in the anchor hole H of the main body structure B. .

The second device 20 has a device main body 21 having an outer diameter substantially the same as the diameter of the through hole 13 of the first device 10, a diameter larger than the device main body 21, and is provided at an upper end of the device main body 21. It has a second flange portion 22, a cylindrical insertion hole 23 provided at an eccentric position of the columnar instrument main body 21, and an injection port 24 formed in a direction along the insertion hole 23. In addition, the insertion hole 23 of the second device 20 has an inside diameter substantially the same as the diameter of the anchor member 51.
The second flange portion 22 is provided with a notch 22 a for forming a gap between the second device 20 and the first device 10 in a state where the second device 20 is installed in the insertion hole 23 of the first device 10. .
In particular, the second instrument 20 is divided into a plurality of pieces (in the present embodiment, cut along a plane parallel to the axis of the instrument body 21 (the axis of the second instrument 20) so as to vertically divide the insertion hole 23. (Two) divided bodies 2. The plurality of (two) divided bodies 2 can be assembled around the anchor member 51 such that the anchor member 51 is inserted into the insertion hole 23 of the second device 20.

Then, as shown in FIGS. 4 (a) and 4 (b), the first instrument 10 is installed in the main body structure B such that the instrument main body 11 is inserted into the anchor hole H of the main body structure B. The second device 20 can be installed on the first device 10 such that the device main body 21 is inserted into the through hole 13 of the device 10.
Thus, when the second device 20 is installed in the through hole 13 of the first device 10 installed in the anchor hole H of the main structure B, the first device 10 rotates around its axis and the The position can be switched, and the second device 20 can rotate around its axis to switch the position of the insertion hole 23.

Specifically, in FIG. 4A, the direction of the first device 10 is switched so that the through-hole 13 is disposed on the right side in the drawing, and the first device 10 is switched such that the insertion hole 23 is disposed on the right side in the drawing. The direction of the two appliances 20 is switched. At this time, the insertion hole 23 of the second device 20 is on the edge of the first device 10. In addition, in the figure, also when the through-hole 13 is arranged on the left side and the insertion hole 23 is arranged on the left side, the insertion hole 23 of the second device 20 is on the edge side of the first device 10.
In FIG. 4B, the direction of the first device 10 is switched so that the through hole 13 is disposed on the left side in the figure, and the second device 20 is disposed such that the insertion hole 23 is disposed on the right side in the diagram. The orientation has been switched. At this time, the insertion hole 23 of the second device 20 is located at the center of the first device 10. In addition, in the figure, when the through-hole 13 is arranged on the right side and the insertion hole 23 is arranged on the left side, the insertion hole 23 of the second device 20 is located at the center side of the first device 10.

With the fixing device 100 including the first device 10 and the second device 20, the position of the insertion hole 23 of the second device 20 can be switched with respect to the anchor hole H of the main structure B. According to the position of the anchor member 51 inserted into the anchor hole H, the orientation and arrangement of the first device 10 and the second device 20 can be appropriately adjusted.
That is, even if the center of the anchor member 51 inserted into the anchor hole H is displaced from the center of the anchor hole H in any direction, the predetermined range (the eccentricity of the through hole 13 of the first device 10 and the second (Sum of the amount of eccentricity of the insertion hole 23 of the device 20), the orientation and arrangement of the first device 10 and the second device 20 are appropriately adjusted, so that the distance between the anchor hole H and the anchor member 51 can be reduced. The first device 10 and the second device 20 can be installed.

  Specifically, the anchor member 51 of the support 50 is inserted into the through hole 13 of the first device 10 installed in the anchor hole H of the main structure B, and the anchor member 51 is inserted into the anchor hole H. And the second device 20 with the anchor member 51 inserted through the insertion hole 23 is installed in the through hole 13 of the first device 10 so that the anchor hole H and the anchor member The fixing device 100 can be attached so that the first device 10 and the second device 20 are set between 51.

Note that a gap is formed between the first flange portion 12 and the main body structure B by a notch 12a provided on the back surface side of the first flange portion 12, and a tool such as a crowbar is pryed into the gap. By inserting the first device 10 into the anchor hole H, the direction of the first device 10 can be easily adjusted.
Similarly, a gap is formed between the second flange portion 22 and the first device 10 by the notch 22a provided on the back surface side of the second flange portion 22, and a tool such as a bur is formed in the gap. By prying in, the second device 20 installed in the through hole 13 can be once pulled up and removed, so that the direction of the second device 20 can be easily adjusted.

As described above, in the case of the fixing device 100 including the first device 10 and the second device 20, the first device 10 and the second device 20 can be changed depending on the position of the anchor member 51 inserted into the anchor hole H. By adjusting the direction and arrangement, the fixing device 100 can be attached such that the first device 10 and the second device 20 are installed between the anchor hole H and the anchor member 51.
Thus, if the fixing device 100 is attached between the anchor hole H and the anchor member 51, the movement of the anchor member 51 sandwiched between the two divided bodies 2 while being inserted into the insertion hole 23 of the second device 20 is regulated. be able to.
That is, since the fixing device 100 attached between the anchor hole H and the anchor member 51 can restrict the movement of the anchor member 51, by attaching the fixing device 100 between the anchor hole H and the anchor member 51, The bearing 50 can be temporarily fixed to the main structure B.
Since the fixing device 100 regulates the movement of the anchor member 51 and temporarily fixes the support 50 to the main structure B, the fixing device 100 can be temporarily fixed in a state where the proof strength against horizontal force during an earthquake is secured. I have.

Next, a construction method of disposing the structure on the main structure using the fixing device 100 will be described with reference to an example of a construction method of disposing the bearing 50 on the main structure B.
The support 50 is provided with a plurality of columnar anchor members 51 extending downward in parallel with each other.
Further, in the main body structure B, a plurality of anchor holes H having a diameter larger than the anchor member 51 are formed corresponding to the anchor members 51 of the support 50.

First, as shown in FIG. 5, the first device 10 is installed in the anchor hole H of the main structure B. Further, a spacer 70 for supporting the bearing 50 is installed on the main body structure B.
Next, as shown in FIG. 6, the anchor member 51 is inserted into the anchor hole H through the through hole 13 of the first device 10, and the support 50 is installed on the main body structure B. At this time, the bearing 50 is supported by the spacer 70.

Next, as shown in FIG. 7, a bridge girder 60 as a predetermined structure is installed on the bearing 50.
Here, due to the weight of the bridge girder 60 acting on the bearing 50, the bearing 50 may be slightly deformed, such as being bent. When the support 50 is deformed, the arrangement of the anchor member 51 through the through-hole 13 is displaced. Therefore, after setting the bridge girder 60 on the support 50, the direction of the first device 10 is adjusted, and the second device 20 In a state where it can be properly installed on the first device 10.

Next, as shown in FIG. 8, a plurality of (here, two) divided bodies 2 are assembled around the anchor member 51, and the second device 20 in a state where the anchor member 51 is inserted through the insertion hole 23 is provided. It is installed in the through hole 13 of the first device 10.
Thus, the fixing device 100 formed by integrating the first device 10 and the second device 20 can temporarily fix the support 50 to the main structure B so as to restrict the movement of the anchor member 51.
In addition, before placing the filler G in the subsequent process, the second device 20 is once removed from the first device 10, the orientation of the first device 10 is adjusted, and the second device 20 is again connected to the first device. 10 may be installed. For example, when the bridge girder is further connected to the bridge girder 60 installed on the support 50, the support 50 and the anchor member 51 may be distorted. For this reason, the second device 20 is once removed from the first device 10 and the direction of the first device 10 is adjusted again so that the position before and after the once installed girder such as a continuous girder can be adjusted. By temporarily installing the support 50 on the first device 10, the temporary fixing of the support 50 by the fixing device 100 can be more suitably performed.

Next, as shown in FIG. 9, a filler G such as mortar is poured into the anchor hole H from the inlet 24 of the second device 20. After the filler G placed in the anchor hole H is cured, the spacer 70 is removed, and the filler G is also placed between the main structure B and the support 50 to be cured.
Thus, the work of disposing the bearing 50 on the main structure B is completed by embedding the fixing device 100 (the first device 10 and the second device 20) with the filler G. Note that the spacer 70 may be embedded with the filler G without being removed.

As described above, by attaching the fixing device 100 of the present embodiment between the anchor hole H and the anchor member 51 and restricting the movement of the anchor member 51, the bearing 50 can be temporarily fixed to the main body structure B. .
In particular, in the case of the fixing device 100 for temporarily fixing the support 50 to the main structure B by restricting the movement of the anchor member 51, the support 50 is attached to the main structure B in a state where the strength against horizontal force during an earthquake is secured. Can be temporarily fixed.

Further, since the fixing device 100 used for temporarily fixing the bearing 50 to the main structure B is embedded with the filler G together with the anchor member 51, the operation of removing the fixing device 100 can be omitted.
In particular, when the fixing device 100 is attached between the anchor hole H and the anchor member 51, there is no need to use a fixing member such as a post-installed anchor or the like, without damaging the main body structure B, as in the prior art. The troublesome work of repairing the damage of the main structure B can be omitted.

  As described above, according to the fixing device 100 of the present embodiment, the anchor member 51 of the support 50 is inserted into the anchor hole H formed in the main structure B, and the support 50 is disposed in the main structure B. In doing so, the bearing 50 can be fixed to the main body structure B while securing the strength against the horizontal force during an earthquake without damaging the main body structure B.

  In the above-described embodiment, the second device 20 is configured by the two divided bodies 2. However, the present invention is not limited to this. The second device 20 may be configured by three divided bodies 2 or four divided bodies 2.

  Further, in the above embodiment, the injection port 24 of the second device 20 is provided at a position vertically divided with the insertion hole 23, but the present invention is not limited to this, and the injection port is not limited thereto. Numeral 24 is a position not divided vertically and may be provided on at least one of the two divided bodies 2.

  In addition, it goes without saying that specific detailed structures and the like can be appropriately changed.

DESCRIPTION OF SYMBOLS 10 1st apparatus 11 Instrument main body 12 1st flange part 12a Notch 13 through-hole 20 2nd apparatus 21 Instrument main body 22 2nd flange part 22a Notch 23 Insertion hole 24 Injection port 2 Split body (a plurality of divided bodies)
50 Bearing (structure)
51 anchor member 60 bridge girder (predetermined structure)
70 Spacer 100 Fixing device B Body structure H Anchor hole G Filler

Claims (6)

A structure in which a plurality of columnar anchor members extending downward in parallel with each other is provided, and a plurality of anchor holes having a diameter larger than the anchor members are formed corresponding to the plurality of anchor members. A fixing device used for fixing to a main body structure,
A first device having an outer diameter substantially the same as the diameter of the anchor hole, and a cylindrical through hole provided at an eccentric position;
A second instrument having an outer diameter substantially the same as the diameter of the through hole, and a cylindrical insertion hole having an inner diameter substantially the same as the diameter of the anchor member is provided at an eccentric position,
With
The second device is configured by a plurality of divided bodies divided along a plane parallel to an axis so as to vertically divide the insertion hole, and the plurality of divided bodies are configured such that the anchor member is the second divided body. A fixing device, wherein the fixing device can be assembled around the anchor member so as to be inserted into an insertion hole of the device.   The fixing device according to claim 1, wherein the second device is provided with an injection port oriented along the insertion hole. On the upper end side of the first device, a first flange portion having a diameter larger than the anchor hole is provided,
On the upper end side of the second instrument, a second flange portion having a diameter larger than the through hole is provided,
The first flange portion is provided with a notch for forming a gap with the main body structure, and the second flange portion is formed with a notch for forming a gap with the first device. The fixing device according to claim 1, wherein a notch is provided. It is a construction method of the structure which arrange | positions the said structure to the said main-body structure using the fixing fixture of Claim 1, Comprising:
A first step of installing the first device in the anchor hole;
A second step of inserting an anchor member of the structure into the anchor hole through a through hole of the first device;
A third step of installing the second device obtained by assembling the plurality of divided bodies around the anchor member in a through hole of the first device;
A fourth step of placing a filler between the main structure and the structure to fix the structure to the main structure;
A method for constructing a structure, comprising:   Between the second step and the third step, a step of installing a predetermined structure on the structure, and a step of adjusting the orientation of the first device after installing the predetermined structure. The method for constructing a structure according to claim 4, wherein: The second device is provided with an inlet that communicates with the anchor hole in a state where the second device is installed in a through hole of the first device,
The method according to claim 4, wherein the fourth step includes a step of driving the filler into the anchor hole from the inlet.

Images