JP2019199798A - Concrete wall reinforcement method - Google Patents

Abstract

To provide a concrete wall reinforcement method advantageous for securing reinforcement strength.SOLUTION: A reinforcement member 16 extending over the lengthwise direction of a hole 14 is inserted into the hole 14 bored from an outside surface 12 of a side wall 10. A space between the reinforcement member 16 inserted into the hole 14 and the inner peripheral surface of the hole 14 is packed with a filler 18 for integrally connecting the reinforcement member 16 and the side wall 10. Located at the inside of the hole 14 on the side of an opening 14A in the hole 14, a female screw 2102 of a closing plate 21 is screwed with a male screw 1610 of a reinforcement 1602. The closing plate 21 is rotated and the closing plate 21 is moved to the deep side of the hole 14 in the axial direction of the reinforcement 1602, so that the filler 18 packed in the hole 14 is compressed. The air mixed in the filler 18 escapes and a gap partially generated in the filler 18 is eliminated so as to increase the filling rate of the filler 18.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a method for reinforcing a concrete wall.

Conventionally, a reinforcement method for enhancing the earthquake resistance of a concrete structure has been proposed.
In Cited Literature 1-3, after drilling a hole in a concrete wall, filling the hole with a filler, inserting a reinforcing member into the hole, and curing the filler, the reinforcing member and the concrete wall are combined. It has been proposed to reinforce the shear force of the concrete wall.

JP 2005-105808 A JP 2012-2111440 A JP2013-44103A

However, in the above-described prior art, since the filler is filled in the elongated holes, it is difficult to remove air mixed in the filler during filling, and a gap may be partially formed in the filler filled in the holes. is there.
When the filler filled in the holes is cured with a gap, the bonding strength between the reinforcing member and the concrete wall decreases, so there is room for improvement in securing the reinforcing strength of the concrete wall.
This invention is made | formed in view of such a situation, The objective is to provide the reinforcement construction method of a concrete wall advantageous in ensuring reinforcement strength.

In order to achieve the above-described object, the present invention provides a drilling step for drilling a hole in a concrete wall forming a side wall of a box culvert constituting an underground tunnel for railway, and a filling step for filling the hole with a filler. A side wall of a box culvert that constitutes an underground tunnel for a railroad including an insertion step of inserting a reinforcing member into the hole, and a compression step of compressing the filler filled in the hole after the filling step and the insertion step. A concrete wall reinforcing method, wherein the reinforcing member is linearly provided with a straight portion extending in a straight line and provided with a male screw at a base portion thereof, and a straight portion provided at a front portion of the straight portion opposite to the base portion. A U-shaped hook portion positioned in a direction orthogonal to the extending direction of the portion, and the U-shaped hook portion is connected to the first straight portion extending coaxially with the tip portion, and the first The first part away from the straight line part A second straight line portion extending in parallel with the straight line portion is connected to an end portion of the first straight line portion and an end portion of the second straight line portion located on the opposite side of the base portion provided with the male screw. The base portion provided with the male screw and a curved portion curved in a semicircular shape convex in the opposite direction, and a hole drilled in the concrete wall, a straight portion longer than the straight portion, and the straight line A concave portion extending from the bottom surface of the portion in a direction orthogonal to the extending direction of the linear portion, accommodating the U-shaped hook portion, and capable of locking the U-shaped hook portion; A filler compression member is provided that has a closing plate that can be inserted and is large enough to close the hole, and a female screw that is formed at the center of the blocking plate and that can be screwed into the male screw. The male screw is screwed, and the filler compression member is inserted into the hole on the opening side of the hole. While being positioned inside, the U-shaped hook portion is locked to the concave portion, and the compression step is performed by rotating the closing plate, whereby the filler compression member is moved along the axial direction of the linear portion. And moving to the inner side of the hole.
The present invention also provides a drilling step of drilling a hole in a concrete wall forming a side wall of a box culvert constituting an underground tunnel for railway, a filling step of filling the hole with a filler, and a reinforcing member in the hole Reinforcement of a concrete wall forming a side wall of a box culvert that constitutes an underground tunnel for railways, which includes an insertion step of inserting a rail, and a compression step of compressing the filler filled in the hole after the filling step and the insertion step In the construction method, the reinforcing member extends in a straight line and has a straight part provided with a male screw at a base part thereof, and an extension direction of the straight part provided at a tip part of the straight part opposite to the base part. A U-shaped hook portion positioned in a direction perpendicular to the first portion, the U-shaped hook portion being separated from the first straight portion and the first straight portion extending coaxially with the tip portion. Parallel to the first straight line portion The second straight portion that is present, and the male screw that connects the end portion of the first straight portion and the end portion of the second straight portion located on the opposite side of the base portion provided with the male screw is provided. A hole that is formed in a semicircular shape that is convex in the opposite direction to the base, and a hole that is drilled in the concrete wall includes a straight portion that is longer than the straight portion, and the straight portion from the bottom of the straight portion. The U-shaped hook portion extends in a direction perpendicular to the extending direction, and the U-shaped hook portion can be engaged with the concave portion, and can be inserted into the hole to close the hole. A filler compression member having a closing plate formed with an insertion hole through which the straight portion is inserted and a female screw member formed with a female screw that can be screwed into the male screw is provided. In the insertion step, the blocking plate is inserted by inserting the linear portion through the insertion hole. The inner screw is positioned inside the hole on the opening side of the recording hole, and the female screw is positioned on the opening side of the hole with respect to the closing plate to position the female screw member. The hook portion is engaged with the recess, and the compression step is performed by rotating the female screw member to move the closing plate to the back side of the hole along the axial direction of the linear portion. It is characterized by.

According to the present invention, the filler filled in the holes is compressed after the filling step and the insertion step.
Therefore, by compressing the filler, gaps that are partially generated in the filler are eliminated, so that the filling rate of the filler can be increased.
For this reason, the bonding strength between the reinforcing member and the concrete wall can be increased, which is advantageous in securing the reinforcing strength of the concrete wall.

It is explanatory drawing of the concrete wall reinforcement construction method in 1st Embodiment, (A) is sectional drawing which shows the state which drilled the hole in the concrete wall, (B) shows the state which inserted the reinforcement member in the hole Sectional drawing and (C) are sectional drawings which show the state which filled the filler with the hole. It is explanatory drawing of the concrete wall reinforcement construction method in 1st Embodiment, (A) is sectional drawing which shows the state which screwed the internal thread and the external thread, and obstruct | occluded the hole by the filler compression member, (B) is a hole Sectional drawing which shows the state which compressed the filler with which it filled in, (C) is sectional drawing which shows the state which filled the restoration | restoration agent in the space produced in the near side of the member for filler compression. It is sectional drawing of the principal part which shows the case where the member for filler compression is comprised with the obstruction board. It is sectional drawing of the principal part which shows the case where the filler compression member is comprised with the obstruction board and the internal thread member. It is sectional drawing of the principal part which shows the case where the member for filler compression is comprised with the obstruction board which has the hole for filler filling. It is explanatory drawing of the reinforcement construction method of the concrete wall in 2nd Embodiment, (A) is sectional drawing which shows the state which drilled the hole in the concrete wall, (B) shows the state which inserted the reinforcement member in the hole Sectional drawing and (C) are sectional drawings which show the state which filled the filler with the hole. It is explanatory drawing of the concrete wall reinforcement construction method in 2nd Embodiment, (A) is sectional drawing which shows the state which screwed the internal thread and the external thread, and obstruct | occluded the hole with the filler compression member, (B) is a hole Sectional drawing which shows the state which compressed the filler with which it filled in, (C) is sectional drawing which shows the state which filled the restoration | restoration agent in the space produced in the near side of the member for filler compression.

(First embodiment)
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the present embodiment, a case will be described in which the concrete wall is a side wall of a box culvert that forms an underground tunnel for railway by being buried in the ground.
In addition, this invention is applicable to wall parts, such as a side wall, a bottom wall, and a ceiling wall which comprise various conventionally well-known concrete structures, such as a digging road, a retaining wall, and a bridge abut.

First, as shown in FIG. 1 (A), holes 14 extending in the thickness direction from the outer surface 12 of the side wall 10 of the box culvert to the side wall 10 are spaced apart in the extending direction of the side wall 10 using a punching device. A plurality of holes are drilled (drilling process).
The diameter of the hole 14 to be drilled is such that a reinforcing member 16 to be described later can be inserted, and the length of the hole 14 is slightly larger than the entire length of the reinforcing member 16.
As the drilling device, various conventionally known devices such as a drill device, a core boring device, and a water jet drilling device can be used.

If the hole 14 is drilled in the side wall 10, as shown in FIG. 1B, the reinforcing member 16 extending in the length direction of the hole 14 is inserted into each hole 14 (insertion step).
The reinforcing member 16 includes a bar-shaped reinforcing bar 1602 extending linearly and a fixing member 1604 that fixes to the filler 18 (FIG. 1C).
The reinforcing bar 1602 is formed with a male screw 1610 at a base portion 16 </ b> A located opposite to the tip portion on the side inserted into the hole 14.
In the present embodiment, as the reinforcing bar 1602, a screw node reinforcing bar in which a male screw 1610 is formed in advance over the entire length is used.
The fixing member 1604 is provided at a tip portion of the reinforcing bar 1602, has a cross-sectional shape that is larger than the cross-sectional shape of the reinforcing bar 1602 and can be inserted into the hole 14.

As the fixing member 1604, a disk-like or rectangular plate-like metal plate attached to the tip of the reinforcing bar 1602 can be used. Alternatively, a nut screwed into the male screw 1610 at the tip of the reinforcing bar 1602 can be used as the fixing member 1604.
The reinforcing member 16 has its tip portion in contact with the inner portion of the hole 14, and its base portion 16 </ b> A is located near the opening 14 </ b> A inside the hole 14.

Next, as shown in FIG. 1C, the reinforcing member 16 and the side wall 10 (concrete wall) are integrated into a gap between the reinforcing member 16 inserted into the hole 14 and the inner peripheral surface of the hole 14. Is filled with a filler 18 (filling step).
As the filler 18, concrete, mortar, or an adhesive can be used.
The filling of the hole 18 with the filler 18 may be performed after the reinforcing member 16 is inserted into the hole 14 as described above, or the filler 18 is inserted into the hole 14 before the reinforcing member 16 is inserted into the hole 14. 14 may be filled, and then the reinforcing member 16 may be inserted into the hole 14 filled with the filler 18.

Next, as shown in FIG. 2A, the filler compression member 20 is attached to the base portion 16 </ b> A of the reinforcing member 16 so as to be positioned inside the hole 14 on the opening 14 </ b> A side of the hole 14.
As shown in FIG. 3, in this embodiment, the filler compressing member 20 is configured by an outer diameter blocking plate 21 that can be inserted into the hole 14 and closes the hole 14.
A female screw 2102 that is screwed into the male screw 1610 of the reinforcing bar 1602 is provided at the center of the closing plate 21.
Therefore, the reinforcing member 16 of the filler compressing member 20 is attached to the base portion 16A by screwing the female screw 2102 of the filler compressing member 20 with the male screw 1610 of the reinforcing bar 1602.

  The filler compressing member 20 only needs to have sufficient rigidity to compress the soft filler 18 having uncured plasticity. As a material constituting the filler compressing member 20, a synthetic resin, Various conventionally known materials such as rubber and iron can be used.

The hole 14 is closed by the closing plate 21 by screwing the female screw 2102 and the male screw 1610. Next, as shown in FIG. 2 (B), the closing plate 21 is rotated to move the closing plate 21 in the axial direction of the reinforcing bar 1602. Then, the filler 18 filled in the hole 14 is compressed by moving it to the back side of the hole 14 (compression process).
The filler compressing member 20 may be configured by the closing plate 21 shown in FIG. 3 as described above, or may be the filler compressing member 20 shown in FIGS. 4 and 5. .

The filler compression member 20 shown in FIG. 4 has a closing plate 22 that can be inserted into the hole 14 and has an outer diameter large enough to close the hole 14, and a reinforcing member insertion hole 2202 formed at the center thereof, and a male screw 1610. And an internal thread member 24 having an internal thread 2402 that can be screwed to the internal thread.
When the filler compressing member 20 is thus composed of two members, the reinforcing member 16 is inserted into the reinforcing member insertion hole 2202 of the closing plate 22 and the female screw member 24 is a hole of the closing plate 22 in the compression process. 14, the female screw 2402 is screwed to the male screw 1610, and the female screw member 24 is rotated to move the closing plate 22 to the inner side of the hole 14 along the axial direction of the reinforcing member 16.

The filler compression member 20 shown in FIG. 5 is obtained by providing a filler filling hole 2220 in the closing plate 22 of the filler compression member 20 shown in FIG. The male screw 2222 is coupled, and the filler filling hole 2220 can be closed by the cap 2222.
The filler compressing member 20 shown in FIG. 5 moves the closing plate 22 to the back side of the hole 14 along the axial direction of the reinforcing member 16 by rotating the female screw member 24 in the compression step. 5 is the same as the filler compressing member 20 shown in FIG. 5, but the filler compressing member 20 shown in FIG. 5 has the filler filling hole 2220, so that the filler compressing member 20 is reinforced in advance before the insertion step. It can be assembled to the member 16.

That is, after the reinforcing member 16 assembled with the filler compression member 20 is inserted into the hole 14, the filler 18 can be filled into the hole 14 from the filler filling hole 2220, and the filler filling hole 2220 before the compression step. Is closed with a cap 2222.
The configuration in which the filler filling hole 2220 is provided in the closing plate 22 can also be applied to the filler compression member 20 shown in FIG.
In any case, when the reinforcing member 16 is displaced in the direction of exiting the hole 14 with the movement of the filler compression member 20 in the compression step, the pressure acting on the filler 18 is reduced.

Therefore, the reinforcing member 16 is pressed against the hole 14 using a jig (not shown), or the filler compressing member 20 is pressed against the hole 14. Thereby, a pressure can be reliably applied with respect to the filler 18 by the movement along the axial direction of the reinforcing bar 1602 of the filler compression member 20.
By compressing the filler 18, the air that has been mixed into the filler 18 is released, and the gap partially generated in the filler 18 is eliminated, and the filling rate of the filler 18 is increased.

After the compression step, the base portion 16A of the reinforcing member 16 and the filler compression member 20 are exposed in the inside S of the hole 14 on the opening 14A side.
Therefore, as shown in FIG. 2 (B), the base 16A of the reinforcing member 16 and the reinforcing member are filled by filling the inside S of the hole 14 on the opening 14A side with the restoration material 26 as shown in FIG. 2 (C). 16 is embedded (repair process).
Thus, embedding the base portion 16A of the reinforcing member 16 and the filler compression member 20 with the restoration material 26 is advantageous in preventing deterioration and corrosion of the base portion 16A of the reinforcement member 16 and the filler compression member 20. .
Moreover, it becomes advantageous when aiming at the improvement of the beauty | look of the outer surface 12 because the hole 14 of the outer surface 12 of the side wall 10 is embed | buried and made into a flat surface.
As the restoration material 26, an epoxy resin can be used. Since the epoxy resin is excellent in waterproofness, it is advantageous in preventing corrosion and deterioration of the reinforcing bar 1602 constituting the reinforcing member 16.
Further, concrete or mortar may be used as the restoration material 26. Since concrete and mortar are excellent in heat resistance and fire resistance, it is advantageous in securing durability in an environment where a fire is assumed.

As described above, according to the present embodiment, after filling the hole 18 drilled in the side wall 10 with the filler 18 and inserting the reinforcing member 16, the hole 20 is rotated by rotating the filler compression member 20. The filler 18 filled in 14 was compressed.
Therefore, by compressing the filler 18, gaps that have partially occurred in the filler 18 are eliminated, so that the filler 18 is cured while the filling rate of the filler 18 is increased.
Therefore, the coupling strength between the reinforcing member 16 and the side wall 10 can be increased, which is advantageous in securing the reinforcing strength of the side wall 10.
Moreover, the above effect can be reliably achieved by a simple configuration such as providing the filler compression member 20 screwed to the reinforcing member 16, which is advantageous in improving the reinforcement strength of the side wall 10 at low cost.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIGS. In the following embodiments, the same parts and members as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and the description thereof is omitted.
In the second embodiment, the reinforcing member 16 uses a reinforcing bar 1620 having a hook portion 1620B curved in a semicircular shape at the tip, and the hole 14 corresponding to the reinforcing bar 1620 is drilled. The form is different.
That is, as shown in FIG. 6 (B), the reinforcing member 16 is composed of a reinforcing bar 1620 including a linear portion 1620A extending linearly and a hook portion 1620B provided at the tip of the linear portion 1620A. The hook portion 1620B functions as a fixing portion that fixes to the filler 18.

  The shape of the hook portion 1620B is not limited to a semicircular shape, and may be a shape bent from the tip of the straight portion 1620A of the reinforcing bar 1620 in a direction perpendicular to the straight portion 1620A. In short, the hook portion is a fixing portion. Any shape can be used as long as it functions as

First, as shown in FIG. 6 (A), holes 14 extending in the thickness direction from the outer surface 12 of the box culvert to the side wall 10 are spaced apart in the extending direction of the side wall 10 using a punching device. Multiple holes are drilled (drilling process).
At that time, after the hole 14 having a dimension slightly longer than the entire length of the reinforcing member 16 is cut in a straight line, the concave portion 28 that accommodates the hook portion 1620B in the direction perpendicular to the extending direction of the hole 14 from the bottom surface of the hole 14 is formed. Drill holes.

As shown in FIG. 6B, the recess 28 has a shape and size such that the tip of the hook portion 1620B is accommodated in the recess 28 in a state where the intermediate portion of the hook portion 1620B is in contact with the bottom surface of the hole 14. Drill holes.
As in the first embodiment, the straight holes 14 can be drilled using various conventionally known drilling devices such as a drill device, a core boring device, and a water jet drilling device.
Further, the recess 28 can be drilled using a water jet drilling apparatus having an injection section that injects high-pressure water in a direction orthogonal to the extending direction of the hole 14.

When the holes 14 having the recesses 28 are drilled in the side wall 10, as shown in FIG. 6B, the reinforcing members 16 extending in the length direction of the holes 14 are inserted into the holes 14 (insertion). Process).
More specifically, when the reinforcing member 16 is inserted into the hole 14 from the hook portion 1620B and the intermediate portion of the hook portion 1620B comes into contact with the bottom surface of the hole 14, the hook portion 1620B is reinforced so that it is accommodated in the recess 28. The member 16 is rotated and positioned in the circumferential direction of the linear portion 1620A.

Next, as shown in FIG. 6C, the reinforcing member 16 and the side wall 10 (concrete wall) are integrated into the gap between the reinforcing member 16 inserted into the hole 14 and the inner peripheral surface of the hole 14. Is filled with a filler 18 (filling step).
In the second embodiment, the insertion step may be performed after the filling step.

  Next, as shown in FIG. 3, similarly to the first embodiment, the female screw 2102 is screwed into the male screw 1610 and the filler compression member 20 is attached to the base portion 16 </ b> A of the reinforcing member 16. As a result, as shown in FIG. 7A, the hole 14 is closed by the filler compression member 20.

Next, as shown in FIG. 7 (B), the filling material compression member 20 is rotated, and the filling material compression member 20 is moved to the back of the hole 14 in the axial direction of the reinforcing bar 1620 to fill the hole 14. The filled filler 18 is compressed (compression process).
By compressing the filler 18, the air that has been mixed into the filler 18 is released, and the gap partially generated in the filler 18 is eliminated, and the filling rate of the filler 18 is increased.

  The hook portion 1620B and the recess 28 are locked to a wall surface 2802 (see FIG. 7A) in which the tip of the hook portion 1620B extends in a direction intersecting the extending direction of the hole 14 in the recess 28. If configured, in the compression step, the movement of the reinforcing member 16 toward the opening 14A side is restricted by the tip of the hook portion 1620B being locked to the wall surface 2802 of the recess 28, so that the workability is improved. Is advantageous.

After the compression step, the base portion 16A of the reinforcing member 16 and the filler compression member 20 are exposed in the inside S of the hole 14 on the opening 14A side.
Therefore, as shown in FIG. 7B, the base 16A of the reinforcing member 16 and the reinforcing member are filled by filling the inside S of the hole 14 on the opening 14A side with the restoration material 26 as shown in FIG. 7C. 16 is embedded (repair process).
Thus, embedding the base portion 16A of the reinforcing member 16 and the filler compression member 20 with the restoration material 26 is advantageous in preventing deterioration and corrosion of the base portion 16A of the reinforcement member 16 and the filler compression member 20. .

As described above, according to the second embodiment, it is needless to say that the same effect as that of the first embodiment is achieved, and the reinforcing bar 1620 having the hook portion 1620B is used as the reinforcing member 16. Therefore, there is no need to provide a fixing member at the front portion of the reinforcing bar 1620, the configuration of the reinforcing member 16 can be simplified, and this is advantageous in reducing the cost.
Further, if the tip of the hook portion 1620B is configured to be locked to the wall surface 2802 of the recess 28, the movement of the reinforcing member 16 toward the opening 14A is restricted in the compression process, so that the workability is improved. It is advantageous in planning.

10 Side wall (concrete wall)
12 External surface 14 Hole 14A Opening 16 Reinforcement member 16A Reinforcement member 162 Reinforcing bar 1604 Fixing member 1610 Male thread 1620 Reinforcing material 18 Filler 20 Filling material compression member 21, 22 Closure plate 2102 Female screw 2220 Filling material filling hole 2222 Cap 24 Female screw member 2402 Female screw 26 Restoration material

In order to achieve the above-described object, the present invention provides a drilling step of drilling a hole from the outer surface of a concrete wall forming a side wall of a box culvert constituting an underground tunnel for railway, and filling the hole with a filler. A railroad underground tunnel comprising a filling step, an insertion step of inserting a reinforcing member into the hole, and a compression step of compressing the filler filled in the hole after the filling step and the insertion step. A method for reinforcing a concrete wall that forms a side wall of a box culvert, wherein the reinforcing member includes a straight portion that extends linearly and is provided with a male screw at a base portion thereof, and a front portion of the straight portion opposite to the base portion. provided constituted by a full-click section you position in the direction orthogonal to the extending direction of the straight portion, a hole drilled before Symbol concrete wall, a long linear portion than the straight portion, the straight line Front from the bottom of the part Notated click section houses a pre-notated click portion before extending in the direction orthogonal to the extending direction of the linear portion is constituted by a lockable recess, closes the insertion possible the hole in the hole A filler compression member having a closing plate of a size to be fitted and a female screw provided at the center of the closing plate and capable of being screwed to the male screw, and in the inserting step, the male screw is screwed to the female screw, the filling material compressing member together is positioned inside the hole in the opening side of the hole, before the notated click section is engaged in the recess, the compression step, by rotating the closure plate, wherein the filling material compressing member along the axial direction of the straight line portion is moved to the innermost side of the hole, the end portion and the filling material compressing member of the linear portion of the reinforcing member located opposite to the hook portion rows is positioned inside the hole Kuboma' than the outer surface of the door said concrete wall It characterized the Ukoto.

Claims (4)

Drilling process for drilling holes in the concrete wall that forms the side wall of the box culvert that constitutes the underground tunnel for railways,
A filling step of filling the holes with a filler;
An insertion step of inserting a reinforcing member into the hole;
After the filling step and the inserting step, a compression step for compressing the filler filled in the holes;
A concrete wall reinforcement method for forming a side wall of a box culvert that constitutes an underground tunnel for railways comprising:
The reinforcing member extends in a straight line and has a straight portion provided with a male screw at a base portion thereof, and is provided at a tip portion of the straight portion opposite to the base portion and in a direction orthogonal to the extending direction of the straight portion. It consists of a U-shaped hook part that is located,
The U-shaped hook portion includes a first straight portion extending coaxially with the tip portion, and a second straight line extending in parallel with the first straight portion at a location away from the first straight portion. And the base portion provided with the male screw connecting the end portion of the first straight portion and the end portion of the second straight portion located on the opposite side of the base portion provided with the male screw. Consists of a curved part curved in a convex semicircular shape,
A hole to be drilled in the concrete wall includes a straight portion longer than the straight portion, and extends from the bottom surface of the straight portion in a direction perpendicular to the extending direction of the straight portion, and accommodates the U-shaped hook portion. And the U-shaped hook part is configured with a recessed part that can be locked,
A filler compression member having a closing plate that can be inserted into the hole and closes the hole, and a female screw that is formed at the center of the closing plate and can be screwed into the male screw;
In the inserting step, the male screw is screwed into the female screw, the filler compression member is positioned inside the hole on the opening side of the hole, and the U-shaped hook portion is locked to the recess. Let
The compression step is performed by rotating the closing plate to move the filler compressing member to the back side of the hole along the axial direction of the linear portion.
A concrete wall reinforcement method that forms the side wall of a box culvert that constitutes an underground tunnel for railways. Drilling process for drilling holes in the concrete wall that forms the side wall of the box culvert that constitutes the underground tunnel for railways,
A filling step of filling the holes with a filler;
An insertion step of inserting a reinforcing member into the hole;
After the filling step and the inserting step, a compression step for compressing the filler filled in the holes;
A concrete wall reinforcement method for forming a side wall of a box culvert that constitutes an underground tunnel for railways comprising:
The reinforcing member extends in a straight line and has a straight portion provided with a male screw at a base portion thereof, and is provided at a tip portion of the straight portion opposite to the base portion and in a direction orthogonal to the extending direction of the straight portion. It consists of a U-shaped hook part that is located,
The U-shaped hook portion includes a first straight portion extending coaxially with the tip portion, and a second straight line extending in parallel with the first straight portion at a location away from the first straight portion. And the base portion provided with the male screw connecting the end portion of the first straight portion and the end portion of the second straight portion located on the opposite side of the base portion provided with the male screw. Consists of a curved part curved in a convex semicircular shape,
A hole to be drilled in the concrete wall includes a straight portion longer than the straight portion, and extends from the bottom surface of the straight portion in a direction perpendicular to the extending direction of the straight portion, and accommodates the U-shaped hook portion. And the U-shaped hook part is configured with a recessed part that can be locked,
A female screw member having a size capable of being inserted into the hole and having a size for closing the hole and having an insertion hole through which the linear portion is inserted and a female screw capable of being screwed into the male screw. A filler compression member having
In the inserting step, the linear portion is inserted through the insertion hole so that the blocking plate is positioned inside the hole on the opening side of the hole, and the female screw is positioned closer to the opening side of the hole than the blocking plate. The female screw member is positioned by screwing onto the male screw, and the U-shaped hook portion is locked to the recess,
The compression step is performed by rotating the female screw member to move the closing plate toward the back side of the hole along the axial direction of the linear portion.
A concrete wall reinforcement method that forms the side wall of a box culvert that constitutes an underground tunnel for railways. A hole for filling a filler is formed in the closing plate,
Performing the insertion step before the filling step;
After the insertion step, perform the filling step from the filler filling hole,
After the filling step, the filler filling hole is closed with a cap.
The method for reinforcing a concrete wall forming a side wall of a box culvert constituting the underground tunnel for railway according to claim 1 or 2. The reinforcing member is located at a position where the base portion is displaced further to the back side of the hole than the opening of the hole in a state where the tip part is in contact with the back part of the hole.
After the compression step, the filler compression member is located at a location displaced in the deep part of the hole rather than the opening of the hole,
After the compression step, a repairing step is performed in which the base of the reinforcing member exposed to the inside of the hole on the opening side of the hole and the filler compression member are filled with a repairing material and embedded in the hole. ,
A method for reinforcing a concrete wall forming a side wall of a box culvert constituting the underground tunnel for railway according to any one of claims 1 to 3.

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