JP2023089880A - Hole-in anchor construction method, accessory mounting method using the same, and hole-in anchor construction system used for performing them - Google Patents

Abstract

To provide a hole-in anchor construction method capable of efficiently injecting an inorganic grout material into the inside of an anchor hole to which an anchor bar is inserted.SOLUTION: A hole-in anchor construction method includes: a pipe insertion step of inserting an insertion part 20a for exhaust of a pipe 20 for exhaust and an insertion part 30a for injection of a pipe 30 for grout material injection into a gap 10d formed between an inner surface 10f of an anchor hole 10 and an outer peripheral surface 11c of a screw bolt 11 inserted into the anchor hole 10, from a hole opening 10a; a decompression step of driving a vacuum pump 22, sucking air from the pipe 20 for exhaust, and thereby turning an inside 10b of the anchor hole 10 to be in a decompressed state; and a grout material pressurization/decompression injection step of injecting an inorganic grout material 34 into the inside 10b of the anchor hole 10 from the pipe 30 for grout material injection by using both suction force generated by the decompressed state and pressurization force generated by driving a grout material injection gun 32.SELECTED DRAWING: Figure 1

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of installing post-installed anchors to be provided on a skeleton such as a concrete structure, a method of attaching an attachment using the same, and a post-installed anchor installation system used to implement them.

Organic grout materials have been widely used as grout materials in post-installed anchor construction methods in which an anchor reinforcement is first attached to an anchor hole and then a grout material for fixing the anchor reinforcement is injected. On the other hand, it is preferable to use an inorganic grout material from the viewpoint of heat resistance and no generation of VOC gas. However, inorganic grout materials generally have the property of having higher viscosity than organic grout materials. In Patent Document 1, a metal discharge pipe for air removal is inserted deep into the hole along with the anchor bar from the hole of the anchor hole drilled in the existing structure, and at the same time, the hole is sealed with a cap, and inorganic grout is applied. A method for constructing a post-installed anchor is disclosed in which material is injected from an injection port provided in a cap by pressurized force generated by using a pump. According to such a construction method, it is possible to reliably fill the inorganic grout material into the anchor hole while discharging the air in the anchor hole from the discharge pipe.

However, the prior art described above has some points to be improved as described below.

That is, even when an inorganic grout material having a higher viscosity than an organic grout material is used, the gap formed between the outer peripheral surface of the anchor bar and the inner surface of the anchor hole into which the inorganic grout material is injected. From the viewpoint of the amount of inorganic grout material used, the dimensions of are preferably the same as in the case of injecting organic grout material. The method of injecting an inorganic grout material into such a gap only by pressurizing force from a pump, as in Patent Document 1, has a problem that post-installed anchors cannot be efficiently constructed.

JP-A-10-102600

The present invention has been devised under the circumstances as described above, and an inorganic grout material having a higher viscosity than an organic grout material can be efficiently applied to the inside of an anchor hole into which an anchor bar is inserted. It is an object of the present invention to provide a method of installing a post-installed anchor that can be injected into a body, a method of attaching an appendage using the same, and a post-installed anchor installation system used to implement them.

A construction method provided by a first aspect of the present invention is a construction method for constructing post-installed anchors in a skeleton, comprising: an anchor hole drilling step of drilling an anchor hole in the skeleton; A step of inserting the anchor muscle into the anchor hole so that the portion is exposed to the outside from the opening of the anchor hole; a pipe insertion step of inserting an exhaust insertion portion of a pipe and an injection insertion portion of a grout material injection pipe; and joining the exhaust pipe and a vacuum pump to discharge air from the inside of the anchor hole. an exhaust path forming step for forming a path; and grout material injection for forming a grout material injection path for injecting an inorganic grout material into the interior of the anchor hole by joining the grout material injection pipe and the grout material injection device. a path forming step; a decompression step of driving the vacuum pump to exhaust the air from the interior of the anchor hole through the exhaust pipe to reduce the interior of the anchor hole to a decompressed state; and the grout material. A pressurizing force is generated by driving an injection device, and the inorganic grout is directed from the grouting material injection pipe to the inside of the anchor hole using both the pressurizing force and the suction force generated by the reduced pressure state. and a grout material pressurization/decompression combined injection step of injecting grout material.

Preferably, the grout material pressurization and depressurization combination injection step is configured to be started on the condition that the inside of the anchor hole has a predetermined degree of pressure reduction in the pressure reduction step.

Preferably, the predetermined degree of pressure reduction generated by the pressure reduction step is -0.07 Mpa or less.

Preferably, in the anchor-bar insertion step, the anchor-bar inserting step includes attaching an anchor-bar supporter to the outer peripheral surface of the anchor bar at or near the rear end of the anchor bar, and inserting the anchor bar in the vicinity of the depth of the anchor hole. It is configured to be positioned at or near the central portion of the cross section of the anchor hole.

Preferably, in the pipe insertion step, the construction method includes inserting the exhaust insertion portion into the anchor hole to the depth of the anchor hole or its vicinity, and inserting the injection insertion portion shallowly into the opening of the hole. It is

Preferably, the construction method is such that, in the pipe insertion step, the anchor bar at the hole opening is moved to the cross-sectional center portion of the anchor hole or It is configured to provide support so as to be positioned in the vicinity thereof.

Preferably, the support of the anchor bar is configured to be performed by a spaced apart arrangement of the insertion portion for exhaustion and the insertion portion for injection in the gap.

Preferably, the spaced apart arrangement is configured such that the exhaust insertion section and the injection insertion section are opposed to each other via the anchor bar.

Preferably, the anchor bar is supported by temporary fixation by the exhaust insertion section and the injection insertion section.

Preferably, in the pipe insertion step, the injection insertion portion is formed so that the cross-sectional shape of the injection insertion portion is a curved flat shape, and the concave curved portion of the curved flat shape is formed on the outer circumference of the anchor bar. The convex curved portion of the curved flat shape is configured to contact the inner surface of the anchor hole so as to contact the surface.

Preferably, in the pipe insertion step, the injection insertion portion is formed to have a heart-shaped cross-sectional shape, and the side having the heart-shaped recess is aligned with the outer peripheral surface of the anchor bar. It is configured to be inserted into the gap so as to touch and so that the side without the heart-shaped recess contacts the inner surface of the anchor hole.

Preferably, in the pipe insertion step, the anchor bar, the exhaust pipe, and the grout material injection pipe are inserted into the anchor hole, and the hole opening is covered with a putty-like adhesive. It is configured to be sealed by

Preferably, in the construction method, in the exhaust path forming step, the exhaust pipe and the vacuum pump are joined via an exhaust hose, and in the grout material pressurizing and depressurizing combined injection step, the pressure reducing step is performed in parallel. On the condition that the inorganic grout material comes out from the exhaust pipe to the exhaust hose, the vacuum pump stops exhausting, and the decompression process is completed.

Preferably, the construction method is configured to stop the injection of the inorganic grout material by the pressurization force after the completion of the decompression step, and to terminate the grout material pressurization/decompression combined injection step.

Preferably, in the construction method, when the inorganic grout material hardens after the grout material pressurization and depressurization combination injection step is completed, the portion of the exhaust pipe and the grout material injection pipe protruding outside from the anchor hole is configured to further include a post-treatment step for removing the

The method for attaching an appendage provided by the second aspect of the present invention is to attach an appendage to the skeleton using the construction method for installing post-installed anchors to the skeleton provided by the first aspect of the present invention. It is characterized by having a step of attaching.

The construction system provided by the third aspect of the present invention is provided by the method for constructing post-installed anchors in the skeleton provided by the first aspect of the present invention or the second aspect of the present invention. It features a post-installed anchor installation system used to implement a method of attaching an appendage.

According to the present invention, the inorganic grout material can be efficiently injected into the anchor hole into which the anchor bar is inserted.

Other features and advantages of the present invention can be made clearer from the following description of embodiments of the invention with reference to the accompanying drawings.

1 is a diagram showing a post-installed anchor construction system used in a post-installed anchor construction method according to a first embodiment of the present invention; FIG. 2 is a perspective view showing a state in which an exhaust insertion portion of an exhaust pipe and an injection insertion portion of a grout material injection pipe of the post-installed anchor construction system of FIG. 1 are inserted into an anchor hole; FIG. 3 is a cross-sectional view taken along line III-III of FIG. 2; FIG. 3 is a cross-sectional view taken along line IV-IV of FIG. 2; FIG. FIG. 5(A) is a left side view of the exhaust pipe of the post-installed anchor construction system of FIG. FIG. 5(B) is a front view of the exhaust pipe of the post-installed anchor installation system of FIG. FIG. 6(A) is a left side view of the grout material injection pipe of the post-installed anchor construction system of FIG. FIG. 6(B) is a front view of the grout material injection pipe of the post-installed anchor construction system of FIG. FIG. 2 is a diagram for explaining an example of a post-installed anchor installation work using the post-installed anchor installation system shown in FIG. 1, and is a schematic diagram showing a state in which an exhaust path and a grouting material injection path are connected to an anchor hole into which a screw bolt is inserted; is. FIG. 8 is a diagram for explaining construction work subsequent to the work shown in FIG. 7, and is a schematic diagram showing a state in which the anchor hole is brought into a decompressed state by a vacuum pump in an exhaust path; FIG. 9 is a diagram for explaining the construction work following the work shown in FIG. 8, in which the inorganic grout material is injected into the anchor hole using both the pressurizing force of the grout material injection gun in the grout material injection path and the suction force due to the reduced pressure state. It is a schematic diagram which shows the state which works. FIG. 10 is a diagram for explaining the construction work following the work shown in FIG. 9, and is a schematic diagram showing a state in which the inorganic grout reaches the depth of the anchor hole and begins to flow into the exhaust hose of the exhaust path; . 11(A) and 11(B) are diagrams for explaining the construction work following the work shown in FIG. FIG. 4 is a schematic diagram showing a state in which the injection of the inorganic grout material is blocked by closing and the injection of the inorganic grout material into the anchor hole is completed. FIG. 11(B) is an enlarged view of the portion indicated by XIB in FIG. 11(A). Fig. 11(A) and Fig. 11(B) are diagrams for explaining the construction work following the work shown in Figs. 11(A) and 11(B) , showing a state in which the vacuum pump is removed from the exhaust path and the grout material injection gun is removed from the grout material injection path; It is a schematic diagram. FIG. 13 is a diagram for explaining the construction work following the work shown in FIG. 12 , and is a schematic diagram showing a state in which the post-construction anchor construction work is completed by removing unnecessary portions of the exhaust route and the grouting material injection route from the post-construction anchor construction location. It is a diagram. FIG. 4 is a diffusion exploded view of a post-installed anchor and steel bracket combination. FIG. 15A shows an exhaust insertion portion of an exhaust pipe and an injection insertion portion of a grout material injection pipe of a post-installed anchor construction system used in a post-installed anchor construction method according to a second embodiment of the present invention. is a perspective view showing a state in which the is inserted into the anchor hole. FIG. 15B is a cross-sectional view along line XVB-XVB in FIG. 15A.

Preferred embodiments of the present invention will be specifically described below with reference to the drawings. It should be noted that, in the following description, directions such as the vertical direction are based on the description of the drawings.

<First Embodiment>
[Post-installation anchor]
As shown in FIG. 13, the post-installed anchor X constructed by the post-installed anchor construction method according to the first embodiment of the present invention includes anchor holes 10, screw bolts 11, inorganic grout material 34, supporting magnets 12, An exhaust insertion portion 20a of the exhaust pipe 20 and an injection insertion portion 30a of the grout material injection pipe 30 are provided. For the post-installed anchor X, for example, after inserting the screw bolt 11 into the interior 10b of the anchor hole 10 drilled in the pier 1 so that the tip portion 11a is exposed to the outside, the exhaust pipe 20 and the grout material injection pipe 30 are inserted. It is formed by injecting and curing the inorganic grout material 34 using a combination.

As will be described later, a plurality of such post-installed anchors X are provided on the bridge pier 1, and are used, for example, to fix the steel brackets 4 for preventing the bridge girder from falling. Note that the bridge pier 1 is, for example, a concrete structure, and corresponds to an example of the skeleton referred to in the present invention. The threaded bolt 11 is a rod-shaped member having a male thread formed on the tip portion 11a exposed to the outside from the opening 10a of the anchor hole 10, and corresponds to an example of the anchor bar in the present invention. An anchor bar refers to a reinforcing bar to be embedded in the anchor hole 10 . The anchor bar is not limited to the screw bolt 11, and may be, for example, a deformed reinforcing bar. A material other than iron may be used for the anchor bar. The shape of the rear end portion of the anchor muscle may be a cut or an oblique cut.

As shown in FIG. 3, the anchor holes 10 are, for example, transversely drilled in the side surface of the pier 1. As shown in FIG. The anchor hole 10 is drilled so that its inner diameter D1 is larger than the outer diameter D2 of the screw bolt 11 by about 10 mm. A gap 10d having a thickness L1 of about 5 mm is formed between the inner surface 10f of the anchor hole 10 and the outer peripheral surface 11c of the screw bolt 11 . An inorganic grout material 34 is injected into the gap 10d. Further, the exhaust insertion portion 20a and the injection insertion portion 30a are inserted into the gap 10d. For example, when the outer diameter D2 of the screw bolt 11 is φ30 mm, the inner diameter D1 of the anchor hole 10 is set to about φ40 mm. The insertion length L6 of the screw bolt 11 into the anchor hole 10 is preferably about 450 mm. A gap 10 g is provided between the rear end portion 11 b of the screw bolt 11 and the hole depth 10 c of the anchor hole 10 . The length L7 of the gap 10g is preferably about 10 to 20 mm. Therefore, the drilling length L8 to the hole depth 10c of the anchor hole 10 is set to approximately 460 to 470 mm.

As shown in FIGS. 2, 3, and 13, the supporting magnet 12 is arranged on the outer peripheral surface 11c near the rear end portion 11b of the screw bolt 11 in the gap 10d, and near the depth 10c of the anchor hole 10. The screw bolt 11 is supported and temporarily fixed so as to be positioned at or near the cross-sectional central portion 10h of the anchor hole 10 . The supporting magnet 12 is used as required when the post-installed anchor X is installed more precisely. The supporting magnet 12 corresponds to an example of the anchor-bar supporting device of the present invention. On the other hand, in the gap 10d, the exhaust insertion portion 20a and the injection insertion portion 30a are arranged so as to face each other with the screw bolt 11 interposed therebetween, and the screw bolt 11 is inserted into the anchor hole 10 at or near the opening 10a of the anchor hole 10. is supported and temporarily fixed so as to be positioned at or near the central portion 10h of the cross section.

As shown in FIG. 13, the inorganic grout material 34 injected into the anchor hole 10 from the injection insertion portion 30a hardens and is held by the exhaust insertion portion 20a, the injection insertion portion 30a, and the support magnet 12. Then, the screw bolt 11 temporarily fixed is fixed. After the construction is completed, in the construction anchor X, the exhaust insertion part 20a and the injection insertion part 30a are cut off from the exhaust pipe 20 and the grout material injection pipe 30, respectively, and the inorganic grout material 34 hardened in the gap 10d. remains in the interior 10b of the anchor hole 10 in the form of being buried in the water.

[Post-installation anchor installation system]
As shown in FIG. 1, in the post-installed anchor construction method according to the present embodiment, a post-installed anchor construction system Y is used to construct the post-installed anchor X. As shown in FIG.

As shown in FIG. 1 , the post-installed anchor construction system Y includes an exhaust path 2 and a grouting material injection path 3 . The exhaust path 2 is a path for exhausting the air in the interior 10b of the anchor hole 10 to reduce the pressure as indicated by an arrow N2. , a valve 24 and a small gasoline generator 25 . Further, the grouting material injection route 3 is a route for injecting the grouting material 34 into the interior 10b of the anchor hole 10 as indicated by an arrow N4. It has a grout injection gun 32 and a cartridge 33 .

The exhaust pipe 20 is for discharging air from the inside 10b of the anchor hole 10, and is attached by inserting it from the opening 10a of the anchor hole 10 into the gap 10d, as shown in FIGS. As shown in FIG. 3, the exhaust pipe 20 is attached by inserting the exhaust insertion portion 20a into the hole depth 10c of the anchor hole 10 or its vicinity. The length L3 of the exhaust insertion portion 20a is set shorter than the perforation length L8. This length L5 (the length from the exhaust insertion portion 20a to the hole depth 10c) is set to 10 mm to 50 mm. For example, if the hole length L8 is 460-470 mm, the length L3 of the exhaust insertion portion 20a is 420-460 mm. As shown in FIGS. 3 and 5A, the rear end portion 20b of the exhaust pipe 20 is disposed outside the anchor hole 10, and the angle A1 with respect to the exhaust insertion portion 20a is approximately 15°. and its length L9 is about 80 mm.

As the exhaust pipe 20, one made of an easily deformable material can be used. For example, as shown in FIGS. A 0.3 mm copper round pipe (special order) is used. By crushing the rear end portion 20b of the exhaust pipe 20 with pliers or the like, it is possible to block the exhaust by a vacuum pump 22, which will be described later. The material of the exhaust pipe 20 is not limited to copper, and may be metal such as brass or stainless steel. However, aluminum pipes are not suitable because they react with the inorganic grout material 34 to generate hydrogen.

The grout material injection pipe 30 is for injecting the inorganic grout material 34 into the anchor hole 10 from its injection insertion portion 30a. can be attached to For example, the grout material injection pipe 30 is attached by shallowly inserting the injection insertion portion 30 a into the hole opening 10 a of the anchor hole 10 . Similar to the exhaust pipe 20, the grout material injection pipe 30 is made of an easily deformable material, and has an outer diameter of D4, for example, as shown in FIGS. is φ14 mm and the material thickness L14 is 0.3 mm (special order). The injection of the inorganic grout material 34 can be cut off by crushing the rear end portion 30b of the grout material injection pipe 30 with pliers or the like. As with the exhaust pipe 20, the material of the grout material injection pipe 30 is not limited to copper, and may be metal such as brass or stainless steel. However, like the exhaust pipe 20, aluminum pipes are not suitable because they react with the inorganic grout material 34 to generate hydrogen.

As described above, as shown in FIG. 3, the inner diameter D1 of the anchor hole 10 is preferably about φ40 mm when the outer diameter D2 of the screw bolt 11 is φ30 mm. As described above, when a round pipe having an outer diameter D3 of about φ5 mm is used as the exhaust pipe 20, and a round pipe having an outer diameter D4 of about φ14 mm is used as the grout material injection pipe 30, it is inserted into the gap 10d as it is. is difficult to do. In order to solve this problem, the cross-sectional shape of the injection insertion portion 30a is preferably processed into a heart shape. As shown in FIGS. 4 and 6B, this heart shape has a depression 30c, and this depression 30c has a pointed shape. However, the shape of the depression 30c is not limited to the pointed shape, and may be an R shape or the like. On the other hand, the side without the depression 30c need not have a pointed shape. The injection insertion portion 30a is arranged so that the side having the heart-shaped depression 30c is in contact with the outer peripheral surface 11c of the screw bolt 11 and the side without the heart-shaped depression 30c is in contact with the inner surface 10f of the anchor hole 10, and the gap 10d is formed. is inserted into

As shown in FIGS. 6(A) and 6(B), the cross-sectional shape of the injection insertion portion 30a preferably has a height L11 of approximately 6.5 mm and a width L13 of approximately 18.0 mm. Further, as shown in FIGS. 3 and 6A, the rear end portion 30b of the grout material injection pipe 30 is arranged outside the anchor hole 10 and forms an angle A2 of about 15° with the injection insertion portion 30a. and its length L12 is about 80 mm. The length L2 of the injection insertion portion 30a is preferably 50 mm or less, approximately 30 mm or less, 20 mm or more and 50 mm or less, 20 mm or more and 40 mm or less, 30 mm or more and 50 mm or less, or about 30 mm, particularly preferably 30 mm. A difference L4 between the length L2 of the injection insertion portion 30a and the length L3 of the evacuation insertion portion 20a is about 370 mm to 440 mm.

As shown in FIGS. 3 and 4, the exhaust insertion portion 20a and the injection insertion portion 30a are arranged around the screw bolt 11 at or near the opening 10a of the anchor hole 10 so as to sandwich the screw bolt 11. and supports the screw bolt 11 so as to be positioned at or near the cross-sectional central portion 10 h of the anchor hole 10 . These exhaust insertion portion 20a and injection insertion portion 30a temporarily fix the screw bolt 11 at or near the hole opening 10a. Therefore, the exhaust insertion section 20a and the injection insertion section 30a also function as anchor muscle supports.

The exhaust insertion section 20a and the injection insertion section 30a are preferably arranged to face each other with the screw bolt 11 interposed therebetween. At this time, it is preferable that the exhaust insertion portion 20a be arranged above the injection insertion portion 30a. More preferably, the evacuation insert 20a is located at the upper cross-sectional end of the anchor hole 10, while the injection insert 30a is located at the lower cross-sectional end.

As shown in FIG. 1, the exhaust hose 21 is for connecting the exhaust pipe 20 and a vacuum pump 22 which will be described later. The exhaust hose 21 is preferably transparent so that the inflow of the inorganic grout material 34 can be confirmed. As the exhaust hose 21, for example, one made of soft polyvinyl chloride having an inner diameter of 5 mm and an outer diameter of 7 mm can be used. Specifically, for example, a transparent hose (trade name) manufactured by Sanyo Kasei Co., Ltd. can be used.

The exhaust hose 21 has a first hose portion 21a on the exhaust pipe 20 side and a second hose portion 21b on the vacuum pump 22 side, which will be described later. The first end portion 21c of the first hose portion 21a is joined to the rear end portion 20b of the exhaust pipe 20, and the second end portion 21d of the second hose portion 21b is joined to the suction port 22a of the vacuum pump 22. there is A trap 23 with a pressure gauge is provided between the first hose portion 21a and the second hose portion 21b. The pressure gauge-equipped trap 23 is for preventing failure caused by water or dust contained in the inorganic grout material 34 or the anchor hole 10 entering the vacuum pump 22 . The pressure gauge 23a is provided to check the degree of pressure reduction in the interior 10b of the anchor hole 10. As shown in FIG. As the pressure gauge-equipped trap 23, for example, a steam pipe drainer is used.

A valve 24 is connected to the first hose portion 21a side of the trap 23 with a pressure gauge. A valve 24 is provided to control the flow of air exhaust in the exhaust hose 21 . As the valve 24, for example, a general-purpose ball valve is used. The valve 24 is configured such that when the handle 24a is turned in the direction indicated by the arrow N1, the valve 24 is opened from the closed state, and the exhaust pipe 20 and the vacuum pump 22 are connected. A first end 24b of the valve 24 is joined to a second end 21e of the first hose portion 21a. In addition, the position of the valve 24 is not limited to the above. may be provided.

The vacuum pump 22 is for reducing the pressure by discharging the air in the interior 10b of the anchor hole 10 from the exhaust pipe 20. As shown in FIG. This depressurized state generates a suction force for injecting the inorganic grout material 34 into the anchor hole 10 . The inorganic grout material 34 is injected into the anchor hole 10 by using both this suction force and the pressure generated by the grout material injection gun 32 which will be described later. As the vacuum pump 22, specifically, for example, an oil rotary vacuum pump TA150MX (model number) manufactured by Tasco can be used. The vacuum pump 22 is connected to a small gasoline generator 25 by a power supply cable 22b, and is supplied with power.

As shown in FIG. 1, the grout material injection hose 31 is for connecting the grout material injection pipe 30 and a later-described grout material injection gun 32 to supply the inorganic grout material 34 . As the grout material injection hose 31, for example, a high-pressure hose having an inner diameter of φ14 mm and an outer diameter of φ21 mm is preferable. Specifically, for example, a morytrade radiator hose silicon tube (trade name) manufactured by MORY TRADE is used.

The grout material injection gun 32 is electrically driven and includes an injection gun main body 32a, a cartridge holding portion 32b, and a pusher 32c. The injection gun main body 32 a has a motor and a battery for operating the motor, and generates pressure for injecting the inorganic graft material 34 into the anchor hole 10 . The motor is activated by pressing switch 32d. The cartridge holding portion 32b is for holding the cartridge 33 containing the inorganic grout material 34. As shown in FIG. The pusher 32c moves in the direction indicated by the arrow N3 by the operation of the motor, and pushes out the inorganic grout material 34 contained in the cartridge 33 from behind. The cartridge 33 is for containing the inorganic grout material 34, and has a nozzle 33a for injecting the inorganic grout material 34 at its tip. The nozzle 33a is connected to the second end 31b of the grout injection hose 31 . The grout material injection gun 33 corresponds to an example of the grout material injection device referred to in the present invention.

As the inorganic grout material 34, a material obtained by mixing powder containing ultra-rapid hardening cement and fine aggregate in the cartridge 33 is used. Specifically, for example, SR inkjet capsule (trade name) manufactured by KFC Co., Ltd. can be used. The inorganic grout material 34 is hardened after being injected into the interior 10b of the anchor hole 10 where the screw bolt 11 held by the exhaust insertion portion 20a, the injection insertion portion 30a, and the support magnet 12 is arranged. However, the supporting magnet 12 is used as required.

As shown in FIGS. 1 to 3, the opening 10a of the anchor hole 10 into which the screw bolt 11, the exhaust pipe 20, and the grouting pipe 30 are inserted is used to maintain the airtightness of the interior 10b of the anchor hole 10. , is filled with putty-like adhesive 13 . As the putty-like adhesive 13, for example, an epoxy resin-based adhesive is preferable. Specifically, for example, Showbond (registered trademark) #101 (model number) manufactured by Showbond Construction Co., Ltd. can be used.

[Post-installed anchor construction method]
First, a step of drilling the anchor holes 10 in the pier 1 (anchor hole drilling step) is performed. As shown in FIG. 3, in order to drill an anchor hole 10 having an inner diameter D1 of φ40 mm and a drilling length L8 of 460 to 470 mm, a φ40 mm drill bit is marked at a position indicating 460 to 470 mm. This drill bit is set in a hammer drill or a core drill, and a hole is drilled in the lateral direction up to the marked position at the planned drilling location of the bridge pier 1 .

Next, a step of inserting the threaded bolt 11 into the anchor hole 10 (anchor wire insertion step) is performed. As shown in FIGS. 2 and 3, the supporting magnet 12 is attached to the outer peripheral portion near the rear end portion 11b of the screw bolt 11, and the screw bolt 11 is attached to the central portion 10h of the cross section of the anchor hole 10 near the depth 10c of the anchor hole 10. Or it is arranged so as to be located in the vicinity thereof, and is inserted so that the insertion length L6 is 450 mm and the length L7 of the gap 10g is 10 to 20 mm.

Next, a step of inserting the exhaust pipe 20 and the grout material injection pipe 30 into the anchor hole 10 and temporarily fixing the screw bolt 11 (pipe insertion step) is performed. As shown in FIGS. 2 to 4, a gap 10d formed between the inner surface 10f of the anchor hole 10 and the outer peripheral surface 11c of the anchor bar 11 is filled with an injection insertion portion 30a having a heart-shaped cross section. It is attached by inserting an exhaust insertion portion 20a having a circular shape from the hole 10a.

The exhaust insertion portion 20a and the injection insertion portion 30a are spaced apart from each other in the gap 10d, and are inserted so as to sandwich the screw bolt 11 therebetween. At this time, it is preferable to arrange the exhaust insertion portion 20a and the injection insertion portion 30a so as to face each other with the screw bolt 11 interposed therebetween. In this case, the exhaust insertion portion 20a is positioned at the upper end of the cross section of the anchor hole 10, and the injection insertion portion 30a is positioned at the lower end of the cross section. By attaching the exhaust insertion portion 20a and the injection insertion portion 30a, the screw bolt 11 is temporarily fixed in the vicinity of the opening 10a of the anchor hole 10 so as to be positioned at or near the central portion 10h of the cross section of the anchor hole 10.

Next, the hole 10a is sealed with the putty-like adhesive 13 while the screw bolt 11 is temporarily fixed by the exhaust insertion portion 20a and the injection insertion portion 30a.

Next, a step of joining the exhaust pipe 20 and the vacuum pump 22 to assemble the exhaust path 2 (exhaust path forming step) is performed. Specifically, as shown in FIG. 7, first, the exhaust hose 21 is formed by joining the first hose portion 21a to a joined body in which the trap 23 with pressure gauge and the valve 24 are joined to the second hose portion 21b. . At that time, the second end 21 e of the first hose portion 21 a is joined to the first end 24 b of the valve 24 . Furthermore, the first end portion 21c of the first hose portion 21a is joined to the rear end portion 20b of the exhaust pipe 20 . Next, the second end 21 d of the second hose portion 21 b is joined to the suction port 22 a of the vacuum pump 22 . Next, the vacuum pump 22 is connected to the small gasoline generator 25 by the power supply cable 22b.

Next, a step of joining the grout material injection pipe 30 and the grout material injection gun 32 to assemble the grout material injection path 3 (grout material injection path forming process) is performed. Specifically, as shown in FIG. 7 , first, the first end portion 31 a of the grout material injection hose 31 is joined to the rear end portion 30 b of the grout material injection pipe 30 . Next, an inorganic grout material 34 in a mortar state is prepared. Next, the cartridge 33 containing the prepared inorganic grout material 34 is set in the cartridge holding portion 32b of the grout injection gun 32, and the nozzle 33a is connected to the second end portion 31b of the hose 31 for grout injection.

Next, the vacuum pump 22 is used to reduce the pressure in the interior 10b of the anchor hole 10 (decompression step). As shown in FIG. 8, the vacuum pump 22 is switched on and driven, and the handle 24a of the valve 24 is turned in the direction indicated by the arrow N1 to discharge air from the interior 10b of the anchor hole 10 as indicated by the arrow N2. and depressurized. Air is continued to be discharged, and the pressure gauge 23a reads −0.07 Mpa or less, confirming that the pressure inside the anchor hole 10 is in a stable state (vacuum state).

Next, a process of injecting the inorganic grout material 34 into the anchor hole 10 using both pressurization by the grout material injection gun 32 and decompression by the vacuum pump 22 (grout material pressurization and decompression combined injection process) is performed. As shown in FIG. 9, the switch 32d of the grouting material injection gun 32 is pushed to move the pusher 32c as indicated by the arrow N3 to generate a pressurizing force as indicated by the arrow N4. Injection of the system grout material 34 is started. At this time, the inside 10b of the anchor hole 10 is in a decompressed state by the operation of the vacuum pump 22, as described above. Therefore, the injection work by the suction force generated by the decompression state and the decompression work by the vacuum pump 22 are performed at the same time. Injecting the inorganic grout material 34 in this way is performed using both the pressurizing force generated by the grout material injection gun 32 and the suction force generated by the vacuum pump 22 . At this time, the pressurizing force generated by driving the grout material injection gun 32 and the suction force generated by the reduced pressure cooperate to inject the inorganic grout material 34 into the interior 10b of the anchor hole 10 from the injection insertion portion 30a. do.

Next, as shown in FIG. 10, in the injection process using both pressurization and decompression, when the injection work has progressed to a certain extent, the inorganic grout material 34 comes out to the exhaust hose 21 on the vacuum pump 22 side. To check. When it is confirmed that the inorganic grout material 34 has come out of the exhaust hose 21, as shown in FIGS. A portion of the rear end portion 20b of the pipe 20 is crushed and closed to form an exhaust blocking portion 20c, which blocks the exhaust by the vacuum pump 22. As shown in FIG. Further, the handle 24a of the valve 24 is returned in the direction indicated by the arrow N5 and closed. In this way, the decompression step of decompressing the inside 10b of the anchor hole 10 by the vacuum pump 22 is completed.

Next, as shown in FIGS. 11(A) and 11(B), using pliers or the like (not shown) as a signal that the pusher 32c of the grout injection gun 32 has stopped moving in the direction indicated by the arrow N3, is used to crush and close part of the rear end portion 30b of the grouting material injection pipe 30 to form an injection blocking portion 30c, which blocks injection of the inorganic grouting material 34 by further pressure. Furthermore, as shown in FIG. 12 , the vacuum pump 22 is disconnected from the exhaust path 2 by removing the second end 21 e of the first hose portion 21 a from the first end 24 b of the valve 24 . Further, the grout material injection gun 32 is separated from the grout material injection path 3 by removing the first end portion 31 a of the grout material injection hose 31 from the rear end portion 30 b of the grout material injection pipe 30 . In this way, the injection process of the inorganic grout material 34 using both pressurization by the grout material injection gun 32 and pressure reduction by the vacuum pump 22 is completed.

Next, a post-treatment step (post-treatment step) is performed by removing unnecessary members protruding outside from the hole openings 10a. As shown in FIG. 13, after the inorganic grout material 34 is cured, the putty-like adhesive 13 is removed. Leaving the exhaust insertion portion 20a and the injection insertion portion 30a in the interior 10b of the anchor hole 10, the rear end portion 20b and first hose portion 21a of the exhaust pipe 20 and the rear end portion 30b of the grout material injection pipe 30 are removed. Remove. Then, the tip portion 11a of the screw bolt 11 protrudes from the bridge pier 1. As shown in FIG.

[How to attach the steel bracket]
As shown in FIG. 14, a plurality of post-installed anchors X are provided on the bridge pier 1, and are used, for example, for attaching steel brackets 4 for preventing the bridge girder from falling. The steel bracket 4 has a back plate 40 , a support plate 41 and a top plate 42 . The back plate 40 has a plurality of mounting holes 40a for mounting the steel brackets 4 to the pier 1. As shown in FIG. The mounting hole 40a is for passing the tip portion 11a of the screw bolt 11 therethrough. A plurality of support plates 41 are provided on the front surface 40 b of the back plate 40 to support the top plate 42 . The top plate 42 is placed on the upper surface 40c of the back plate 40 and the upper surface 41a of the support plate 41, and is a portion for receiving the fallen bridge girder. The steel bracket 4 corresponds to an example of the accessory referred to in the present invention.

First, a plurality of anchor holes 10 are drilled in the pier 1 . According to the construction method described above, the tip portions 11a of the plurality of post-installed anchors X are formed so as to be substantially parallel. Therefore, the position of the attachment hole 40a of the steel bracket 4 is determined at the stage when the anchor hole 10 is drilled. Based on the actual arrangement of the plurality of drilled anchor holes 10, a drawing showing the positions for forming the mounting holes 40a is created. Based on this drawing, a template plate 5 is produced, and according to the template plate 5, the steel bracket 4 having the mounting holes 40a at the correct positions of the back plate 40 is produced. The plurality of anchor holes 10 may not be arranged regularly due to the positions of the reinforcing bars in the pier 1 or the like. The template plate 5 is produced in order to grasp the positions of these anchor holes 10 with certainty.

Next, a plurality of post-installed anchors X are constructed using the above-described construction method, and nuts 14 screwed to the tip portions 11a of the screw bolts 11 of the plurality of post-installed anchors X whose construction is completed are used to attach the steel brackets. 4 is fixed to the pier 1.

According to the present embodiment, when constructing the post-installed anchor X, the anchor hole 10 is drilled and the pressure generated by driving the grout injection gun 32 and the suction force generated by driving the vacuum pump 22 are used in combination. Then, the inorganic grout material 34 is injected toward the gap 10 d formed between the outer peripheral surface 11 c of the anchor bar 11 and the inner surface 10 f of the anchor hole 10 . As a result, the inorganic grout material 34 having a higher viscosity than the organic grout material can be efficiently injected into the gap 10d. Since the inorganic grout material 34 can be efficiently injected, the work period for constructing the post-installed anchors X can be shortened. Further, since the injection work of the inorganic grout material 34 can be proceeded without widening the gap 10d, the necessary amount of the inorganic grout material 34 to be filled in the anchor hole 10 can be reduced. Therefore, cost reduction can be achieved. In addition, since the anchor holes 10 do not need to be enlarged, it is also advantageous in that it is possible to prevent the strength of the frame such as the pier 1 from being lowered due to drilling.

In addition, in the step of depressurizing the inside 10b of the anchor hole 10, the inorganic grout material 34 is injected using both suction force and pressure on the condition that the inside 10b of the anchor hole 10 has a predetermined degree of decompression. Since the step of filling is started, the injection work of the inorganic grout material 34 can be performed with sufficient suction force and pressure from the beginning. As a result, the work of injecting the inorganic grout material 34 into the anchor hole 10 can be efficiently advanced, so that the work can be labor-saving and the burden on the operator can be reduced.

Further, in the step of decompressing the inside 10b of the anchor hole 10, the degree of decompression generated by the decompression work by the vacuum pump 22 is -0.07 Mpa or less. Thus, the inorganic grout material 34 is injected using both the strong suction force generated by the decompressed state close to vacuum and the pressurizing force of the grout material injection gun 32 . Therefore, the work of injecting the inorganic grout material 34 into the anchor hole 10 can be efficiently proceeded, thereby saving the labor of the work and reducing the burden on the operator.

In addition, in the step of inserting the screw bolt 11 into the anchor hole 10, the support magnet 12 is attached to the outer peripheral surface 11c near the rear end portion 11b of the screw bolt 11, and the screw bolt 11 is inserted into the anchor hole 10 near the depth 10c of the anchor hole 10. , the inorganic grout material 34 can be injected all around the screw bolt 11 without interruption. This makes it possible to increase the fixing strength of the screw bolt 11 to the skeleton such as the bridge pier 1 .

In addition, in the step of inserting the exhaust pipe 20 and the grout material injection pipe 30 into the anchor hole 10, the exhaust insertion portion 20a is inserted into the hole depth 10c of the anchor hole 10 or its vicinity, and the injection insertion portion 30a is inserted into the hole. It is inserted shallowly into the mouth 10a. Therefore, since the air can be exhausted from the inside 10b of the anchor hole 10 without obstructing the inorganic grout material 34, the inorganic grout material 34 can be efficiently injected using both the suction force and the pressure force. can be done. As a result, work can be labor-saving, and the burden on the worker can be reduced.

Further, in the step of inserting the exhaust insertion portion 20a and the injection insertion portion 30a into the anchor hole 10, the screw bolt 11 is supported by the exhaust insertion portion 20a and the injection insertion portion 30a. Additional components such as the magnet 12 can be eliminated or reduced. As a result, the materials required for construction can be reduced, so the cost for construction of the post-installed anchors X can be reduced.

Further, the screw bolt 11 is supported by temporary fixation by the exhaust insertion portion 20a and the injection insertion portion 30a. Since the worker temporarily fixes the screw bolt 11 at the same time as attaching the exhaust insertion portion 20a and the injection insertion portion 30a, the work can be labor-saving and the burden on the worker can be reduced.

Further, the screw bolt 11 is supported by arranging the exhaust insertion portion 20a and the injection insertion portion 30a on the outer peripheral surface 11c of the screw bolt 11 so as to be spaced apart from each other. Therefore, since the screw bolt 11 is arranged so as to be positioned at or near the cross-sectional central portion 10h of the anchor hole 10, the inorganic grout material 34 can be injected all around the screw bolt 11 without interruption. As a result, the screw bolt 11 can be firmly fixed to the skeleton of the bridge pier 1 and the like.

In addition, the exhaust insertion portion 20a and the injection insertion portion 30a are arranged so as to face each other with the screw bolt 11 interposed therebetween. Therefore, the screw bolt 11 can be reliably supported. As a result, the post-installed anchor X can be installed with good positional accuracy.

In addition, if the injection insertion portion 30a is formed to have a heart-shaped cross section, it can be easily fitted to the inner surface 10f of the anchor hole 10 and the outer peripheral surface 11c of the screw bolt 11. A larger cross section of the insertion portion 30a can be obtained. As a result, the inorganic grout material 34, which has a higher viscosity than the organic grout material, can be efficiently injected, so that labor can be saved and the burden on the operator can be reduced. In addition, since the heart shape can be formed relatively easily from a round pipe, the burden on the supplier can be reduced, leading to cost reduction.

Further, while the screw bolt 11, the exhaust insertion portion 20a, and the injection insertion portion 30a are inserted into the anchor hole 10, the hole opening 10a is sealed with the putty-like adhesive 13. As shown in FIG. Therefore, since an additional special member for sealing the hole opening 10a is not required, cost reduction can be achieved.

In addition, in the injection process using both pressurization and decompression, the process of decompressing the inside 10b of the anchor hole 10 is performed in parallel, and the inorganic grout material 34 is discharged from the exhaust pipe 20 to the exhaust hose 21. The evacuation by the vacuum pump 22 is stopped on the condition that the anchor hole 10 has come, and the step of reducing the pressure in the inside 10b of the anchor hole 10 is completed. In this way, the inorganic grout material 34 is prevented from flowing into the vacuum pump 22 by stopping the injection by the suction force due to the reduced pressure at an appropriate time. As a result, failure of the post-installation anchor installation system due to failure of the vacuum pump 22 can be prevented. In addition, by confirming that the inorganic grout material 34 has come out from the exhaust pipe 20 to the exhaust hose 21, it is possible to reliably know when to stop the injection, so that the inorganic grout to the anchor hole 10 can be confirmed. The injection work of the material 34 can proceed efficiently.

In addition, after the process of making the inside 10b of the anchor hole 10 decompressed, the injection of the inorganic grout material 34 by the pressurizing force is stopped, and the inorganic grout material 34 is injected into the anchor hole 10 using both pressurization and decompression. Complete the injection procedure. In this way, since the injection work can be performed appropriately, the injection work of the inorganic grout material 34 can be efficiently advanced. As a result, work can be labor-saving, and the burden on the worker can be reduced.

Further, in the post-treatment step, the portions protruding outside of the exhaust pipe 20 and the grout material injection pipe 30 are removed. As a result, the amount of members remaining in the interior 10b of the anchor hole 10 can be minimized, so that the amount of metal such as copper used can be reduced, and metal resources such as copper can be conserved. .

In addition, thin copper pipes are used as the exhaust pipe 20 and/or the grouting pipe 30 . As a result, the amount of members remaining in the interior 10b of the anchor hole 10 can be minimized, so that the amount of metal such as copper used can be reduced, and metal resources such as copper can be conserved. .

In addition, in the step of inserting the exhaust insertion portion 20a and the injection insertion portion 30a into the anchor hole 10, the length L5 from the exhaust insertion portion 20a to the hole depth 10c is set to 10 to 50 mm. In addition, the difference L4 between the length L2 of the injection insertion portion 30a and the length L3 of the discharge insertion portion 20a is sufficiently long. Therefore, the inorganic grout material 34 is injected without creating voids in the anchor holes 10 . As a result, the occurrence of rust after construction can be prevented.

Also, the mounting hole 40a of the steel bracket 4 is formed to be larger than the screw bolt 11 by 2 mm. Therefore, as the number of screw bolts 11 increases, the position of the mounting hole 40a needs to be more precise. By arranging the screw bolt 11 so as to be positioned at or near the cross-sectional central portion 10h of the anchor hole 10, the distal end portions 11a of the plurality of post-installed anchors X are formed to be substantially parallel. can issue As a result, the position of the mounting hole 40a of the steel bracket 4 is determined at the stage when the anchor hole 10 is drilled. You can start working on 4. As a result, the construction period can be shortened by at least about 1.5 months compared to the conventional method. In the conventional construction method of the post-installed anchor X, the position of the mounting hole 40a of the steel bracket 4 can be determined only at the stage when all the screw bolts 11 are attached, and it takes time to determine the center position of the tip portion 11a of the screw bolt 11. It took. Therefore, measuring the center position of the tip portion 11a of the screw bolt 11 and creating a drawing has been considerably delayed.

<Second embodiment>
A post-installed anchor construction method and a post-installed anchor construction system YA used therein according to a second embodiment of the present invention will be described with reference to FIGS. 15(A) and 15(B). The post-installed anchor XA is installed by the post-installed anchor installation method using the post-installed anchor installation system YA. In the post-installed anchor installation system YA, components having the same or similar functions as the components of the post-installed anchor installation system Y according to the first embodiment are denoted by the same reference numerals as in the post-installed anchor installation system Y. there is A detailed description of these will be omitted. In addition, in the post-installed anchor construction method using the post-installed anchor construction system YA, the same parts as the post-installed anchor construction method using the post-installed anchor construction system Y according to the first embodiment will be explained in detail. omitted.

As shown in FIG. 15A, the post-installed anchor installation system YA is different from the post-installed anchor installation system Y according to the first embodiment in that it has a grout material injection pipe 30A. The grout material injection pipe 30</b>A has an injection insertion portion 30</b>Aa for injecting the inorganic grout material 34 into the anchor hole 10 . The injection section 30Aa is attached to the vicinity of the hole opening 10a of the anchor hole 10, and has the same material as the injection section 30a.

As shown in FIG. 15(B), the injection insertion portion 30Aa is formed to have a curved flat cross-sectional shape. The curvature of the flattened concave curved portion 30Ad is formed to be greater than the curvature of the convex curved portion 30Ae. Curved flat shapes include, for example, crescent shapes. In the pipe insertion step, the injection insertion portion 30Aa is arranged such that the flat curved concave curved portion 30Ad contacts the outer peripheral surface 11c of the screw bolt 11, and the flat curved convex curved portion 30Ae contacts the inner surface 10f of the anchor hole 10. is inserted into the gap 10d so as to be in contact with the

According to the post-installed anchor installation method and the post-installed anchor installation system YA used in the method of the present embodiment, the same effects as those of the first embodiment can be obtained. Further, according to the present embodiment, when the injection insertion portion 30Aa is formed to have a curved flat cross-sectional shape, it is easy to fit the inner surface 10f of the anchor hole 10 and the outer peripheral surface 11c of the screw bolt 11. Even with the sized gap 10d, the cross section of the injection insertion portion 30Aa can be made larger. As a result, since the inorganic grout material 34 can be efficiently injected, the work can be labor-saving, and the burden on the operator can be reduced.

The invention is not limited to the content of the embodiments described above. The post-installed anchor installation method according to the present invention, the attachment attachment method using the same, and the specific configuration of the post-installed anchor installation system used for implementing them can be designed and changed in various ways.

The post-installed anchor installation method of the present invention, the method of attaching an attachment using the same, and the post-installed anchor installation system used for implementing them are when the anchor holes 10 are vertically drilled upward from the bottom surface of the skeleton. can also be applied. In this case, the inorganic grout material 34 is injected from the holes 10a on the lower surface.

X Post-construction anchor 1 Bridge pier (framework)
10 anchor hole 10a hole mouth (of anchor hole 10)
10b inside (of anchor hole 10)
10c deep hole (of anchor hole 10)
10d Gap 10f Inner surface (of anchor hole 10)
11 screw bolt (anchor bar)
11a Tip (of screw bolt 11)
11b Rear end (of screw bolt 11)
11c Outer peripheral surface (of screw bolt 11)
12 Supporting magnet (anchor bar support)
13 Putty-like adhesive 2 Exhaust path 20 Exhaust pipe 20a Exhaust insert (of exhaust pipe 20)
21 exhaust hose 22 vacuum pump 3 grout material injection path 30, 30A grout material injection pipe 30a, 30Aa injection insertion portion (of grout material injection pipe 30, 30A)
30c depression (of injection insert 30a)
30Ad Concave curved portion (of injection insertion portion 30Aa)
30Ae Convex curved portion (of injection insertion portion 30Aa)
31 grout material injection hose 32 grout material injection gun (grout material injection device)
34 Inorganic grout material

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of installing post-installed anchors to be provided on a skeleton such as a concrete structure, a method of attaching an attachment using the same, and a post-installed anchor installation system used to implement them.

Organic grout materials have been widely used as grout materials in post-installed anchor construction methods in which an anchor reinforcement is first attached to an anchor hole and then a grout material for fixing the anchor reinforcement is injected. On the other hand, it is preferable to use an inorganic grout material from the viewpoint of heat resistance and no generation of VOC gas. However, inorganic grout materials generally have the property of having higher viscosity than organic grout materials. In Patent Document 1, a metal discharge pipe for air removal is inserted deep into the hole along with the anchor bar from the hole of the anchor hole drilled in the existing structure, and at the same time, the hole is sealed with a cap, and inorganic grout is applied. A method for constructing a post-installed anchor is disclosed in which material is injected from an injection port provided in a cap by pressurized force generated by using a pump. According to such a construction method, it is possible to reliably fill the inorganic grout material into the anchor hole while discharging the air in the anchor hole from the discharge pipe.

However, the prior art described above has some points to be improved as described below.

That is, even when an inorganic grout material having a higher viscosity than an organic grout material is used, the gap formed between the outer peripheral surface of the anchor bar and the inner surface of the anchor hole into which the inorganic grout material is injected. From the viewpoint of the amount of inorganic grout material used, the dimensions of are preferably the same as in the case of injecting organic grout material. The method of injecting an inorganic grout material into such a gap only by pressurizing force from a pump, as in Patent Document 1, has a problem that post-installed anchors cannot be efficiently constructed.

JP-A-10-102600

The present invention has been devised under the circumstances as described above, and an inorganic grout material having a higher viscosity than an organic grout material can be efficiently applied to the inside of an anchor hole into which an anchor bar is inserted. It is an object of the present invention to provide a method of installing a post-installed anchor that can be injected into a body, a method of attaching an appendage using the same, and a post-installed anchor installation system used to implement them.

A construction method provided by a first aspect of the present invention is a construction method for constructing post-installed anchors in a skeleton, comprising: an anchor hole drilling step of drilling an anchor hole in the skeleton; A step of inserting the anchor muscle into the anchor hole so that the portion is exposed to the outside from the opening of the anchor hole; a pipe insertion step of inserting an exhaust insertion portion of a pipe and an injection insertion portion of a grout material injection pipe; and joining the exhaust pipe and a vacuum pump to discharge air from the inside of the anchor hole. an exhaust path forming step for forming a path; and grout material injection for forming a grout material injection path for injecting an inorganic grout material into the interior of the anchor hole by joining the grout material injection pipe and the grout material injection device. a path forming step; a decompression step of driving the vacuum pump to exhaust the air from the interior of the anchor hole through the exhaust pipe to reduce the interior of the anchor hole to a decompressed state; and the grout material. A pressurizing force is generated by driving an injection device, and the inorganic grout is directed from the grouting material injection pipe to the inside of the anchor hole using both the pressurizing force and the suction force generated by the reduced pressure state. and a grout material pressurization and decompression combination injection step of injecting grout material, and in the pipe insertion step, the anchor muscle is formed in the hole by the exhaust insertion portion and the injection insertion portion inserted into the gap. It is characterized in that the support is provided so as to be positioned at or near the central portion of the cross section of the anchor hole .

The construction method provided by the first aspect of the present invention preferably has the following configurations.

Preferably, the support of the anchor bar is configured to be performed by a spaced apart arrangement of the insertion portion for exhaustion and the insertion portion for injection in the gap.

Preferably, the spaced apart arrangement is configured such that the exhaust insertion section and the injection insertion section are opposed to each other via the anchor bar.

Preferably, the anchor bar is supported by provisional fixation by the exhaust insertion section and the injection insertion section.

Preferably, in the anchor-bar insertion step, the anchor-bar inserting step includes attaching an anchor-bar supporter to the outer peripheral surface of the anchor bar at or near the rear end of the anchor bar, and inserting the anchor bar in the vicinity of the depth of the anchor hole. It is configured to be positioned at or near the central portion of the cross section of the anchor hole.

Preferably, the construction method is configured such that, in the pipe inserting step, the exhaust insertion section is inserted into the anchor hole or in the vicinity thereof, and the injection insertion section is shallowly inserted into the hole mouth. ing.

A construction method provided by a second aspect of the present invention is a construction method for constructing post-installed anchors in a skeleton, comprising: an anchor hole drilling step of drilling an anchor hole in the skeleton; A step of inserting the anchor muscle into the anchor hole so that the portion is exposed to the outside from the opening of the anchor hole; a pipe insertion step of inserting an exhaust insertion portion of a pipe and an injection insertion portion of a grout material injection pipe; and joining the exhaust pipe and a vacuum pump to discharge air from the inside of the anchor hole. an exhaust path forming step for forming a path; and grout material injection for forming a grout material injection path for injecting an inorganic grout material into the interior of the anchor hole by joining the grout material injection pipe and the grout material injection device. a path forming step; a decompression step of driving the vacuum pump to exhaust the air from the interior of the anchor hole through the exhaust pipe to reduce the interior of the anchor hole to a decompressed state; and the grout material. A pressurizing force is generated by driving an injection device, and the inorganic grout is directed from the grouting material injection pipe to the inside of the anchor hole using both the pressurizing force and the suction force generated by the reduced pressure state. and a grout material pressurized and depressurized combined injection step of injecting grout material, and in the pipe insertion step, the injection insertion portion is formed so that the cross-sectional shape is a curved flat shape, and the curved flat shape is formed. It is characterized in that it is inserted into the gap so that the concave curved portion is in contact with the outer peripheral surface of the anchor bar and the convex curved portion of the curved flat shape is in contact with the inner surface of the anchor hole.

A construction method provided by a third aspect of the present invention is a construction method for constructing post-installed anchors in a skeleton, comprising: an anchor hole drilling step of drilling an anchor hole in the skeleton; A step of inserting the anchor muscle into the anchor hole so that the portion is exposed to the outside from the opening of the anchor hole; a pipe insertion step of inserting an exhaust insertion portion of a pipe and an injection insertion portion of a grout material injection pipe; and joining the exhaust pipe and a vacuum pump to discharge air from the inside of the anchor hole. an exhaust path forming step for forming a path; and grout material injection for forming a grout material injection path for injecting an inorganic grout material into the interior of the anchor hole by joining the grout material injection pipe and the grout material injection device. a path forming step; a decompression step of driving the vacuum pump to exhaust the air from the interior of the anchor hole through the exhaust pipe to reduce the interior of the anchor hole to a decompressed state; and the grout material. A pressurizing force is generated by driving an injection device, and the inorganic grout is directed from the grouting material injection pipe to the inside of the anchor hole using both the pressurizing force and the suction force generated by the reduced pressure state. and a grout material pressurized and depressurized injection step of injecting grout material, and in the pipe insertion step, the injection insertion portion is formed so that the cross section shape is heart-shaped, and the heart-shaped depression is formed. It is characterized in that it is inserted into the gap so that the side with the anchor bar is in contact with the outer peripheral surface of the anchor bar and the side without the heart-shaped depression is in contact with the inner surface of the anchor hole.

The construction method provided by any one of the first to third aspects of the present invention preferably has the following configurations.

Preferably, the grout material pressurization and depressurization combination injection step is configured to be started on the condition that the inside of the anchor hole has a predetermined degree of pressure reduction in the pressure reduction step.

Preferably, the predetermined degree of pressure reduction generated by the pressure reduction step is -0.07 Mpa or less.

Preferably, in the pipe insertion step, the anchor bar, the exhaust pipe, and the grout material injection pipe are inserted into the anchor hole, and the hole opening is covered with a putty-like adhesive. It is configured to be sealed by

Preferably, in the construction method, in the exhaust path forming step, the exhaust pipe and the vacuum pump are joined via an exhaust hose, and in the grout material pressurizing and depressurizing combined injection step, the pressure reducing step is performed in parallel. On the condition that the inorganic grout material comes out from the exhaust pipe to the exhaust hose, the vacuum pump stops exhausting, and the decompression process is completed.

Preferably, the construction method is configured to stop the injection of the inorganic grout material by the pressurization force after the completion of the decompression step, and to terminate the grout material pressurization/decompression combined injection step.

Preferably, in the construction method, when the inorganic grout material hardens after the grout material pressurization and depressurization combination injection step is completed, the portion of the exhaust pipe and the grout material injection pipe protruding outside from the anchor hole is configured to further include a post-treatment step for removing the

The method for attaching an appendage provided by the fourth aspect of the present invention uses the method for installing post-installed anchors to the skeleton provided by any one of the first to third aspects of the present invention. It is characterized by having a step of attaching an accessory to the skeleton.

The construction system provided by the fifth aspect of the present invention is a construction method for constructing a post-installed anchor to the skeleton provided by any one of the first to third aspects of the present invention or the fourth aspect of the present invention. A post-installed anchor installation system used to implement the appendage installation method provided by Aspect of the Company.

According to the present invention, the inorganic grout material can be efficiently injected into the anchor hole into which the anchor bar is inserted.

Other features and advantages of the present invention can be made clearer from the following description of embodiments of the invention with reference to the accompanying drawings.

1 is a diagram showing a post-installed anchor construction system used in a post-installed anchor construction method according to a first embodiment of the present invention; FIG. 2 is a perspective view showing a state in which an exhaust insertion portion of an exhaust pipe and an injection insertion portion of a grout material injection pipe of the post-installed anchor construction system of FIG. 1 are inserted into an anchor hole; FIG. 3 is a cross-sectional view taken along line III-III of FIG. 2; FIG. 3 is a cross-sectional view taken along line IV-IV of FIG. 2; FIG. FIG. 5(A) is a left side view of the exhaust pipe of the post-installed anchor construction system of FIG. FIG. 5(B) is a front view of the exhaust pipe of the post-installed anchor installation system of FIG. FIG. 6(A) is a left side view of the grout material injection pipe of the post-installed anchor construction system of FIG. FIG. 6(B) is a front view of the grout material injection pipe of the post-installed anchor construction system of FIG. FIG. 2 is a diagram for explaining an example of a post-installed anchor installation work using the post-installed anchor installation system shown in FIG. 1, and is a schematic diagram showing a state in which an exhaust path and a grouting material injection path are connected to an anchor hole into which a screw bolt is inserted; is. FIG. 8 is a diagram for explaining construction work subsequent to the work shown in FIG. 7, and is a schematic diagram showing a state in which the anchor hole is brought into a decompressed state by a vacuum pump in an exhaust path; FIG. 9 is a diagram for explaining the construction work following the work shown in FIG. 8, in which the inorganic grout material is injected into the anchor hole using both the pressurizing force of the grout material injection gun in the grout material injection path and the suction force due to the reduced pressure state. It is a schematic diagram which shows the state which works. FIG. 10 is a diagram for explaining the construction work following the work shown in FIG. 9, and is a schematic diagram showing a state in which the inorganic grout reaches the depth of the anchor hole and begins to flow into the exhaust hose of the exhaust path; . 11(A) and 11(B) are diagrams for explaining the construction work following the work shown in FIG. FIG. 4 is a schematic diagram showing a state in which the injection of the inorganic grout material is blocked by closing and the injection of the inorganic grout material into the anchor hole is completed. FIG. 11(B) is an enlarged view of the portion indicated by XIB in FIG. 11(A). Fig. 11(A) and Fig. 11(B) are diagrams for explaining the construction work following the work shown in Figs. 11(A) and 11(B) , showing a state in which the vacuum pump is removed from the exhaust path and the grout material injection gun is removed from the grout material injection path; It is a schematic diagram. FIG. 13 is a diagram for explaining the construction work following the work shown in FIG. 12 , and is a schematic diagram showing a state in which the post-construction anchor construction work is completed by removing unnecessary portions of the exhaust route and the grouting material injection route from the post-construction anchor construction location. It is a diagram. FIG. 4 is a diffusion exploded view of a post-installed anchor and steel bracket combination. FIG. 15A shows an exhaust insertion portion of an exhaust pipe and an injection insertion portion of a grout material injection pipe of a post-installed anchor construction system used in a post-installed anchor construction method according to a second embodiment of the present invention. is a perspective view showing a state in which the is inserted into the anchor hole. FIG. 15B is a cross-sectional view along line XVB-XVB in FIG. 15A.

Preferred embodiments of the present invention will be specifically described below with reference to the drawings. It should be noted that, in the following description, directions such as the vertical direction are based on the description of the drawings.

<First Embodiment>
[Post-installation anchor]
As shown in FIG. 13, the post-installed anchor X constructed by the post-installed anchor construction method according to the first embodiment of the present invention includes anchor holes 10, screw bolts 11, inorganic grout material 34, supporting magnets 12, An exhaust insertion portion 20a of the exhaust pipe 20 and an injection insertion portion 30a of the grout material injection pipe 30 are provided. For the post-installed anchor X, for example, after inserting the screw bolt 11 into the interior 10b of the anchor hole 10 drilled in the pier 1 so that the tip portion 11a is exposed to the outside, the exhaust pipe 20 and the grout material injection pipe 30 are inserted. It is formed by injecting and curing the inorganic grout material 34 using a combination.

As will be described later, a plurality of such post-installed anchors X are provided on the bridge pier 1, and are used, for example, to fix the steel brackets 4 for preventing the bridge girder from falling. Note that the bridge pier 1 is, for example, a concrete structure, and corresponds to an example of the skeleton referred to in the present invention. The threaded bolt 11 is a rod-shaped member having a male thread formed on the tip portion 11a exposed to the outside from the opening 10a of the anchor hole 10, and corresponds to an example of the anchor bar in the present invention. An anchor bar refers to a reinforcing bar to be embedded in the anchor hole 10 . The anchor bar is not limited to the screw bolt 11, and may be, for example, a deformed reinforcing bar. A material other than iron may be used for the anchor bar. The shape of the rear end portion of the anchor muscle may be a cut or an oblique cut.

As shown in FIG. 3, the anchor holes 10 are, for example, transversely drilled in the side surface of the pier 1. As shown in FIG. The anchor hole 10 is drilled so that its inner diameter D1 is larger than the outer diameter D2 of the screw bolt 11 by about 10 mm. A gap 10d having a thickness L1 of about 5 mm is formed between the inner surface 10f of the anchor hole 10 and the outer peripheral surface 11c of the screw bolt 11 . An inorganic grout material 34 is injected into the gap 10d. Further, the exhaust insertion portion 20a and the injection insertion portion 30a are inserted into the gap 10d. For example, when the outer diameter D2 of the screw bolt 11 is φ30 mm, the inner diameter D1 of the anchor hole 10 is set to about φ40 mm. The insertion length L6 of the screw bolt 11 into the anchor hole 10 is preferably about 450 mm. A gap 10 g is provided between the rear end portion 11 b of the screw bolt 11 and the hole depth 10 c of the anchor hole 10 . The length L7 of the gap 10g is preferably about 10 to 20 mm. Therefore, the drilling length L8 to the hole depth 10c of the anchor hole 10 is set to approximately 460 to 470 mm.

As shown in FIGS. 2, 3, and 13, the supporting magnet 12 is arranged on the outer peripheral surface 11c near the rear end portion 11b of the screw bolt 11 in the gap 10d, and near the depth 10c of the anchor hole 10. The screw bolt 11 is supported and temporarily fixed so as to be positioned at or near the cross-sectional central portion 10h of the anchor hole 10 . The supporting magnet 12 is used as required when the post-installed anchor X is installed more precisely. The supporting magnet 12 corresponds to an example of the anchor-bar supporting device of the present invention. On the other hand, in the gap 10d, the exhaust insertion portion 20a and the injection insertion portion 30a are arranged so as to face each other with the screw bolt 11 interposed therebetween, and the screw bolt 11 is inserted into the anchor hole 10 at or near the opening 10a of the anchor hole 10. is supported and temporarily fixed so as to be positioned at or near the central portion 10h of the cross section.

As shown in FIG. 13, the inorganic grout material 34 injected into the anchor hole 10 from the injection insertion portion 30a hardens and is held by the exhaust insertion portion 20a, the injection insertion portion 30a, and the support magnet 12. Then, the screw bolt 11 temporarily fixed is fixed. After the construction is completed, in the construction anchor X, the exhaust insertion part 20a and the injection insertion part 30a are cut off from the exhaust pipe 20 and the grout material injection pipe 30, respectively, and the inorganic grout material 34 hardened in the gap 10d. remains in the interior 10b of the anchor hole 10 in the form of being buried in the water.

[Post-installation anchor installation system]
As shown in FIG. 1, in the post-installed anchor construction method according to the present embodiment, a post-installed anchor construction system Y is used to construct the post-installed anchor X. As shown in FIG.

As shown in FIG. 1 , the post-installed anchor construction system Y includes an exhaust path 2 and a grouting material injection path 3 . The exhaust path 2 is a path for exhausting the air in the interior 10b of the anchor hole 10 to reduce the pressure as indicated by an arrow N2. , a valve 24 and a small gasoline generator 25 . Further, the grouting material injection route 3 is a route for injecting the grouting material 34 into the interior 10b of the anchor hole 10 as indicated by an arrow N4. It has a grout injection gun 32 and a cartridge 33 .

The exhaust pipe 20 is for discharging air from the inside 10b of the anchor hole 10, and is attached by inserting it from the opening 10a of the anchor hole 10 into the gap 10d, as shown in FIGS. As shown in FIG. 3, the exhaust pipe 20 is attached by inserting the exhaust insertion portion 20a into the hole depth 10c of the anchor hole 10 or its vicinity. The length L3 of the exhaust insertion portion 20a is set shorter than the perforation length L8. This length L5 (the length from the exhaust insertion portion 20a to the hole depth 10c) is set to 10 mm to 50 mm. For example, if the hole length L8 is 460-470 mm, the length L3 of the exhaust insertion portion 20a is 420-460 mm. As shown in FIGS. 3 and 5A, the rear end portion 20b of the exhaust pipe 20 is disposed outside the anchor hole 10, and the angle A1 with respect to the exhaust insertion portion 20a is approximately 15°. and its length L9 is about 80 mm.

As the exhaust pipe 20, one made of an easily deformable material can be used. For example, as shown in FIGS. A 0.3 mm copper round pipe (special order) is used. By crushing the rear end portion 20b of the exhaust pipe 20 with pliers or the like, it is possible to block the exhaust by a vacuum pump 22, which will be described later. The material of the exhaust pipe 20 is not limited to copper, and may be metal such as brass or stainless steel. However, aluminum pipes are not suitable because they react with the inorganic grout material 34 to generate hydrogen.

The grout material injection pipe 30 is for injecting the inorganic grout material 34 into the anchor hole 10 from its injection insertion portion 30a. can be attached to For example, the grout material injection pipe 30 is attached by shallowly inserting the injection insertion portion 30 a into the hole opening 10 a of the anchor hole 10 . Similar to the exhaust pipe 20, the grout material injection pipe 30 is made of an easily deformable material, and has an outer diameter of D4, for example, as shown in FIGS. is φ14 mm and the material thickness L14 is 0.3 mm (special order). The injection of the inorganic grout material 34 can be cut off by crushing the rear end portion 30b of the grout material injection pipe 30 with pliers or the like. As with the exhaust pipe 20, the material of the grout material injection pipe 30 is not limited to copper, and may be metal such as brass or stainless steel. However, like the exhaust pipe 20, aluminum pipes are not suitable because they react with the inorganic grout material 34 to generate hydrogen.

As described above, as shown in FIG. 3, the inner diameter D1 of the anchor hole 10 is preferably about φ40 mm when the outer diameter D2 of the screw bolt 11 is φ30 mm. As described above, when a round pipe having an outer diameter D3 of about φ5 mm is used as the exhaust pipe 20, and a round pipe having an outer diameter D4 of about φ14 mm is used as the grout material injection pipe 30, it is inserted into the gap 10d as it is. is difficult to do. In order to solve this problem, the cross-sectional shape of the injection insertion portion 30a is preferably processed into a heart shape. As shown in FIGS. 4 and 6B, this heart shape has a depression 30c, and this depression 30c has a pointed shape. However, the shape of the depression 30c is not limited to the pointed shape, and may be an R shape or the like. On the other hand, the side without the depression 30c need not have a pointed shape. The injection insertion portion 30a is arranged so that the side having the heart-shaped depression 30c is in contact with the outer peripheral surface 11c of the screw bolt 11 and the side without the heart-shaped depression 30c is in contact with the inner surface 10f of the anchor hole 10, and the gap 10d is formed. is inserted into

As shown in FIGS. 6(A) and 6(B), the cross-sectional shape of the injection insertion portion 30a preferably has a height L11 of approximately 6.5 mm and a width L13 of approximately 18.0 mm. Further, as shown in FIGS. 3 and 6A, the rear end portion 30b of the grout material injection pipe 30 is arranged outside the anchor hole 10 and forms an angle A2 of about 15° with the injection insertion portion 30a. and its length L12 is about 80 mm. The length L2 of the injection insertion portion 30a is preferably 50 mm or less, approximately 30 mm or less, 20 mm or more and 50 mm or less, 20 mm or more and 40 mm or less, 30 mm or more and 50 mm or less, or about 30 mm, particularly preferably 30 mm. A difference L4 between the length L2 of the injection insertion portion 30a and the length L3 of the evacuation insertion portion 20a is about 370 mm to 440 mm.

As shown in FIGS. 3 and 4, the exhaust insertion portion 20a and the injection insertion portion 30a are arranged around the screw bolt 11 at or near the opening 10a of the anchor hole 10 so as to sandwich the screw bolt 11. and supports the screw bolt 11 so as to be positioned at or near the cross-sectional central portion 10 h of the anchor hole 10 . These exhaust insertion portion 20a and injection insertion portion 30a temporarily fix the screw bolt 11 at or near the hole mouth 10a. Therefore, the exhaust insertion section 20a and the injection insertion section 30a also function as anchor muscle supports.

The exhaust insertion section 20a and the injection insertion section 30a are preferably arranged to face each other with the screw bolt 11 interposed therebetween. At this time, it is preferable that the exhaust insertion portion 20a be arranged above the injection insertion portion 30a. More preferably, the evacuation insert 20a is located at the upper cross-sectional end of the anchor hole 10, while the injection insert 30a is located at the lower cross-sectional end.

As shown in FIG. 1, the exhaust hose 21 is for connecting the exhaust pipe 20 and a vacuum pump 22 which will be described later. The exhaust hose 21 is preferably transparent so that the inflow of the inorganic grout material 34 can be confirmed. As the exhaust hose 21, for example, one made of soft polyvinyl chloride having an inner diameter of 5 mm and an outer diameter of 7 mm can be used. Specifically, for example, a transparent hose (trade name) manufactured by Sanyo Kasei Co., Ltd. can be used.

The exhaust hose 21 has a first hose portion 21a on the exhaust pipe 20 side and a second hose portion 21b on the vacuum pump 22 side, which will be described later. The first end portion 21c of the first hose portion 21a is joined to the rear end portion 20b of the exhaust pipe 20, and the second end portion 21d of the second hose portion 21b is joined to the suction port 22a of the vacuum pump 22. there is A trap 23 with a pressure gauge is provided between the first hose portion 21a and the second hose portion 21b. The pressure gauge-equipped trap 23 is for preventing failure caused by water or dust contained in the inorganic grout material 34 or the anchor hole 10 entering the vacuum pump 22 . The pressure gauge 23a is provided to check the degree of pressure reduction in the interior 10b of the anchor hole 10. As shown in FIG. As the pressure gauge-equipped trap 23, for example, a steam pipe drainer is used.

A valve 24 is connected to the first hose portion 21a side of the trap 23 with a pressure gauge. A valve 24 is provided to control the flow of air exhaust in the exhaust hose 21 . As the valve 24, for example, a general-purpose ball valve is used. The valve 24 is configured such that when the handle 24a is turned in the direction indicated by the arrow N1, the valve 24 is opened from the closed state, and the exhaust pipe 20 and the vacuum pump 22 are connected. A first end 24b of the valve 24 is joined to a second end 21e of the first hose portion 21a. In addition, the position of the valve 24 is not limited to the above. may be provided.

The vacuum pump 22 is for reducing the pressure by discharging the air in the interior 10b of the anchor hole 10 from the exhaust pipe 20. As shown in FIG. This depressurized state generates a suction force for injecting the inorganic grout material 34 into the anchor hole 10 . The inorganic grout material 34 is injected into the anchor hole 10 by using both this suction force and the pressure generated by the grout material injection gun 32 which will be described later. As the vacuum pump 22, specifically, for example, an oil rotary vacuum pump TA150MX (model number) manufactured by Tasco can be used. The vacuum pump 22 is connected to a small gasoline generator 25 by a power supply cable 22b, and is supplied with power.

As shown in FIG. 1, the grout material injection hose 31 is for connecting the grout material injection pipe 30 and a later-described grout material injection gun 32 to supply the inorganic grout material 34 . As the grout material injection hose 31, for example, a high-pressure hose having an inner diameter of φ14 mm and an outer diameter of φ21 mm is preferable. Specifically, for example, a morytrade radiator hose silicon tube (trade name) manufactured by MORY TRADE is used.

The grout material injection gun 32 is electrically driven and includes an injection gun main body 32a, a cartridge holding portion 32b, and a pusher 32c. The injection gun main body 32 a has a motor and a battery for operating the motor, and generates pressure for injecting the inorganic graft material 34 into the anchor hole 10 . The motor is activated by pressing switch 32d. The cartridge holding portion 32b is for holding the cartridge 33 containing the inorganic grout material 34. As shown in FIG. The pusher 32c moves in the direction indicated by the arrow N3 by the operation of the motor, and pushes out the inorganic grout material 34 contained in the cartridge 33 from behind. The cartridge 33 is for containing the inorganic grout material 34, and has a nozzle 33a for injecting the inorganic grout material 34 at its tip. The nozzle 33a is connected to the second end 31b of the grout injection hose 31 . The grout material injection gun 33 corresponds to an example of the grout material injection device referred to in the present invention.

As the inorganic grout material 34, a material obtained by mixing powder containing ultra-rapid hardening cement and fine aggregate in the cartridge 33 is used. Specifically, for example, SR inkjet capsule (trade name) manufactured by KFC Co., Ltd. can be used. The inorganic grout material 34 is hardened after being injected into the interior 10b of the anchor hole 10 where the screw bolt 11 held by the exhaust insertion portion 20a, the injection insertion portion 30a, and the support magnet 12 is arranged. However, the supporting magnet 12 is used as required.

As shown in FIGS. 1 to 3, the opening 10a of the anchor hole 10 into which the screw bolt 11, the exhaust pipe 20, and the grouting pipe 30 are inserted is used to maintain the airtightness of the interior 10b of the anchor hole 10. , is filled with putty-like adhesive 13 . As the putty-like adhesive 13, for example, an epoxy resin-based adhesive is preferable. Specifically, for example, Showbond (registered trademark) #101 (model number) manufactured by Showbond Construction Co., Ltd. can be used.

[Post-installed anchor construction method]
First, a step of drilling the anchor holes 10 in the pier 1 (anchor hole drilling step) is performed. As shown in FIG. 3, in order to drill an anchor hole 10 having an inner diameter D1 of φ40 mm and a drilling length L8 of 460 to 470 mm, a φ40 mm drill bit is marked at a position indicating 460 to 470 mm. This drill bit is set in a hammer drill or a core drill, and a hole is drilled in the lateral direction up to the marked position at the planned drilling location of the bridge pier 1 .

Next, a step of inserting the threaded bolt 11 into the anchor hole 10 (anchor wire insertion step) is performed. As shown in FIGS. 2 and 3, the supporting magnet 12 is attached to the outer peripheral portion near the rear end portion 11b of the screw bolt 11, and the screw bolt 11 is attached to the central portion 10h of the cross section of the anchor hole 10 near the depth 10c of the anchor hole 10. Or it is arranged so as to be located in the vicinity thereof, and is inserted so that the insertion length L6 is 450 mm and the length L7 of the gap 10g is 10 to 20 mm.

Next, a step of inserting the exhaust pipe 20 and the grout material injection pipe 30 into the anchor hole 10 and temporarily fixing the screw bolt 11 (pipe insertion step) is performed. As shown in FIGS. 2 to 4, a gap 10d formed between the inner surface 10f of the anchor hole 10 and the outer peripheral surface 11c of the anchor bar 11 is filled with an injection insertion portion 30a having a heart-shaped cross section. It is attached by inserting an exhaust insertion portion 20a having a circular shape from the hole 10a.

The exhaust insertion portion 20a and the injection insertion portion 30a are spaced apart from each other in the gap 10d, and are inserted so as to sandwich the screw bolt 11 therebetween. At this time, it is preferable to arrange the exhaust insertion portion 20a and the injection insertion portion 30a so as to face each other with the screw bolt 11 interposed therebetween. In this case, the exhaust insertion portion 20a is positioned at the upper end of the cross section of the anchor hole 10, and the injection insertion portion 30a is positioned at the lower end of the cross section. By attaching the exhaust insertion portion 20a and the injection insertion portion 30a, the screw bolt 11 is temporarily fixed in the vicinity of the opening 10a of the anchor hole 10 so as to be positioned at or near the central portion 10h of the cross section of the anchor hole 10.

Next, the hole 10a is sealed with the putty-like adhesive 13 while the screw bolt 11 is temporarily fixed by the exhaust insertion portion 20a and the injection insertion portion 30a.

Next, a step of joining the exhaust pipe 20 and the vacuum pump 22 to assemble the exhaust path 2 (exhaust path forming step) is performed. Specifically, as shown in FIG. 7, first, the exhaust hose 21 is formed by joining the first hose portion 21a to a joined body in which the trap 23 with pressure gauge and the valve 24 are joined to the second hose portion 21b. . At that time, the second end 21 e of the first hose portion 21 a is joined to the first end 24 b of the valve 24 . Furthermore, the first end portion 21c of the first hose portion 21a is joined to the rear end portion 20b of the exhaust pipe 20 . Next, the second end 21 d of the second hose portion 21 b is joined to the suction port 22 a of the vacuum pump 22 . Next, the vacuum pump 22 is connected to the small gasoline generator 25 by the power supply cable 22b.

Next, a step of joining the grout material injection pipe 30 and the grout material injection gun 32 to assemble the grout material injection path 3 (grout material injection path forming process) is performed. Specifically, as shown in FIG. 7 , first, the first end portion 31 a of the grout material injection hose 31 is joined to the rear end portion 30 b of the grout material injection pipe 30 . Next, an inorganic grout material 34 in a mortar state is prepared. Next, the cartridge 33 containing the prepared inorganic grout material 34 is set in the cartridge holding portion 32b of the grout injection gun 32, and the nozzle 33a is connected to the second end portion 31b of the hose 31 for grout injection.

Next, the vacuum pump 22 is used to reduce the pressure in the interior 10b of the anchor hole 10 (decompression step). As shown in FIG. 8, the vacuum pump 22 is switched on and driven, and the handle 24a of the valve 24 is turned in the direction indicated by the arrow N1 to discharge air from the interior 10b of the anchor hole 10 as indicated by the arrow N2. and depressurized. Air is continued to be discharged, and the pressure gauge 23a reads −0.07 Mpa or less, confirming that the pressure inside the anchor hole 10 is in a stable state (vacuum state).

Next, a step of injecting the inorganic grout material 34 into the anchor hole 10 using both pressurization by the grout material injection gun 32 and pressure reduction by the vacuum pump 22 (grout material pressurization and depressurization combined injection process) is performed. As shown in FIG. 9, the switch 32d of the grouting material injection gun 32 is pushed to move the pusher 32c as indicated by the arrow N3 to generate a pressurizing force as indicated by the arrow N4. Injection of the system grout material 34 is started. At this time, the inside 10b of the anchor hole 10 is in a decompressed state by the operation of the vacuum pump 22, as described above. Therefore, the injection work by the suction force generated by the decompression state and the decompression work by the vacuum pump 22 are simultaneously performed. Injecting the inorganic grout material 34 in this way is performed using both the pressurizing force generated by the grout material injection gun 32 and the suction force generated by the vacuum pump 22 . At this time, the pressurizing force generated by driving the grout material injection gun 32 and the suction force generated by the reduced pressure cooperate to inject the inorganic grout material 34 from the injection insertion portion 30a into the interior 10b of the anchor hole 10. do.

Next, as shown in FIG. 10, in the injection process using both pressurization and decompression, when the injection work has progressed to a certain extent, the inorganic grout material 34 comes out to the exhaust hose 21 on the vacuum pump 22 side. To check. When it is confirmed that the inorganic grout material 34 has come out of the exhaust hose 21, as shown in FIGS. A portion of the rear end portion 20b of the pipe 20 is crushed and closed to form an exhaust blocking portion 20c, which blocks the exhaust by the vacuum pump 22. As shown in FIG. Further, the handle 24a of the valve 24 is returned in the direction indicated by the arrow N5 and closed. In this way, the decompression step of decompressing the inside 10b of the anchor hole 10 by the vacuum pump 22 is completed.

Next, as shown in FIGS. 11(A) and 11(B), using pliers or the like (not shown) as a signal that the pusher 32c of the grout injection gun 32 has stopped moving in the direction indicated by the arrow N3, is used to crush and close part of the rear end portion 30b of the grouting material injection pipe 30 to form an injection blocking portion 30c, which blocks injection of the inorganic grouting material 34 by further pressure. Furthermore, as shown in FIG. 12 , the vacuum pump 22 is disconnected from the exhaust path 2 by removing the second end 21 e of the first hose portion 21 a from the first end 24 b of the valve 24 . Further, the grout material injection gun 32 is separated from the grout material injection path 3 by removing the first end portion 31 a of the grout material injection hose 31 from the rear end portion 30 b of the grout material injection pipe 30 . In this way, the injection process of the inorganic grout material 34 using both pressurization by the grout material injection gun 32 and pressure reduction by the vacuum pump 22 is completed.

Next, a post-treatment step (post-treatment step) is performed by removing unnecessary members protruding outside from the hole openings 10a. As shown in FIG. 13, after the inorganic grout material 34 is cured, the putty-like adhesive 13 is removed. Leaving the exhaust insertion portion 20a and the injection insertion portion 30a in the interior 10b of the anchor hole 10, the rear end portion 20b and first hose portion 21a of the exhaust pipe 20 and the rear end portion 30b of the grout material injection pipe 30 are removed. Remove. Then, the tip portion 11a of the screw bolt 11 protrudes from the bridge pier 1. As shown in FIG.

[How to attach the steel bracket]
As shown in FIG. 14, a plurality of post-installed anchors X are provided on the bridge pier 1, and are used, for example, for attaching steel brackets 4 for preventing the bridge girder from falling. The steel bracket 4 has a back plate 40 , a support plate 41 and a top plate 42 . The back plate 40 has a plurality of mounting holes 40a for mounting the steel brackets 4 to the pier 1. As shown in FIG. The mounting hole 40a is for passing the tip portion 11a of the screw bolt 11 therethrough. A plurality of support plates 41 are provided on the front surface 40 b of the back plate 40 to support the top plate 42 . The top plate 42 is placed on the upper surface 40c of the back plate 40 and the upper surface 41a of the support plate 41, and is a portion for receiving the fallen bridge girder. The steel bracket 4 corresponds to an example of the accessory referred to in the present invention.

First, a plurality of anchor holes 10 are drilled in the pier 1 . According to the construction method described above, the tip portions 11a of the plurality of post-installed anchors X are formed so as to be substantially parallel. Therefore, the position of the attachment hole 40a of the steel bracket 4 is determined at the stage when the anchor hole 10 is drilled. Based on the actual arrangement of the plurality of drilled anchor holes 10, a drawing showing the positions for forming the mounting holes 40a is created. Based on this drawing, a template plate 5 is produced, and according to the template plate 5, the steel bracket 4 having the mounting holes 40a at the correct positions of the back plate 40 is produced. The plurality of anchor holes 10 may not be arranged regularly due to the positions of the reinforcing bars in the pier 1 or the like. The template plate 5 is produced in order to grasp the positions of these anchor holes 10 with certainty.

Next, a plurality of post-installed anchors X are constructed using the above-described construction method, and nuts 14 screwed to the tip portions 11a of the screw bolts 11 of the plurality of post-installed anchors X whose construction is completed are used to attach the steel brackets. 4 is fixed to the pier 1.

According to the present embodiment, when constructing the post-installed anchor X, the anchor hole 10 is drilled and the pressure generated by driving the grout injection gun 32 and the suction force generated by driving the vacuum pump 22 are used in combination. Then, the inorganic grout material 34 is injected toward the gap 10 d formed between the outer peripheral surface 11 c of the anchor bar 11 and the inner surface 10 f of the anchor hole 10 . As a result, the inorganic grout material 34 having a higher viscosity than the organic grout material can be efficiently injected into the gap 10d. Since the inorganic grout material 34 can be efficiently injected, the work period for constructing the post-installed anchors X can be shortened. Further, since the injection work of the inorganic grout material 34 can be proceeded without widening the gap 10d, the necessary amount of the inorganic grout material 34 to be filled in the anchor hole 10 can be reduced. Therefore, cost reduction can be achieved. In addition, since the anchor holes 10 do not need to be enlarged, it is also advantageous in that it is possible to prevent the strength of the frame such as the pier 1 from being lowered due to drilling.

In addition, in the step of depressurizing the inside 10b of the anchor hole 10, the inorganic grout material 34 is injected using both suction force and pressure on the condition that the inside 10b of the anchor hole 10 has a predetermined degree of decompression. Since the step of filling is started, the injection work of the inorganic grout material 34 can be performed with sufficient suction force and pressure from the beginning. As a result, the work of injecting the inorganic grout material 34 into the anchor hole 10 can be efficiently advanced, so that the work can be labor-saving and the burden on the operator can be reduced.

Further, in the step of decompressing the inside 10b of the anchor hole 10, the degree of decompression generated by the decompression work by the vacuum pump 22 is -0.07 Mpa or less. Thus, the inorganic grout material 34 is injected using both the strong suction force generated by the decompressed state close to vacuum and the pressurizing force of the grout material injection gun 32 . Therefore, the work of injecting the inorganic grout material 34 into the anchor hole 10 can be efficiently proceeded, thereby saving the labor of the work and reducing the burden on the operator.

In addition, in the step of inserting the screw bolt 11 into the anchor hole 10, the support magnet 12 is attached to the outer peripheral surface 11c near the rear end portion 11b of the screw bolt 11, and the screw bolt 11 is inserted into the anchor hole 10 near the depth 10c of the anchor hole 10. , the inorganic grout material 34 can be injected all around the screw bolt 11 without interruption. This makes it possible to increase the fixing strength of the screw bolt 11 to the skeleton such as the bridge pier 1 .

In addition, in the step of inserting the exhaust pipe 20 and the grout material injection pipe 30 into the anchor hole 10, the exhaust insertion portion 20a is inserted into the hole depth 10c of the anchor hole 10 or its vicinity, and the injection insertion portion 30a is inserted into the hole. It is inserted shallowly into the mouth 10a. Therefore, since the air can be exhausted from the inside 10b of the anchor hole 10 without obstructing the inorganic grout material 34, the inorganic grout material 34 can be efficiently injected using both the suction force and the pressure force. can be done. As a result, work can be labor-saving, and the burden on the worker can be reduced.

Further, in the step of inserting the exhaust insertion portion 20a and the injection insertion portion 30a into the anchor hole 10, the screw bolt 11 is supported by the exhaust insertion portion 20a and the injection insertion portion 30a. Additional components such as the magnet 12 can be eliminated or reduced. As a result, the materials required for construction can be reduced, so the cost for construction of the post-installed anchors X can be reduced.

Further, the screw bolt 11 is supported by temporary fixation by the exhaust insertion portion 20a and the injection insertion portion 30a. Since the worker temporarily fixes the screw bolt 11 at the same time as attaching the exhaust insertion portion 20a and the injection insertion portion 30a, the work can be labor-saving and the burden on the worker can be reduced.

Further, the screw bolt 11 is supported by arranging the exhaust insertion portion 20a and the injection insertion portion 30a on the outer peripheral surface 11c of the screw bolt 11 so as to be spaced apart from each other. Therefore, since the screw bolt 11 is arranged so as to be positioned at or near the cross-sectional central portion 10h of the anchor hole 10, the inorganic grout material 34 can be injected all around the screw bolt 11 without interruption. As a result, the screw bolt 11 can be firmly fixed to the skeleton of the bridge pier 1 and the like.

In addition, the exhaust insertion portion 20a and the injection insertion portion 30a are arranged so as to face each other with the screw bolt 11 interposed therebetween. Therefore, the screw bolt 11 can be reliably supported. As a result, the post-installed anchor X can be installed with good positional accuracy.

In addition, if the injection insertion portion 30a is formed to have a heart-shaped cross section, it can be easily fitted to the inner surface 10f of the anchor hole 10 and the outer peripheral surface 11c of the screw bolt 11. A larger cross section of the insertion portion 30a can be obtained. As a result, the inorganic grout material 34, which has a higher viscosity than the organic grout material, can be efficiently injected, so that labor can be saved and the burden on the operator can be reduced. In addition, since the heart shape can be formed relatively easily from a round pipe, the burden on the supplier can be reduced, leading to cost reduction.

Further, while the screw bolt 11, the exhaust insertion portion 20a, and the injection insertion portion 30a are inserted into the anchor hole 10, the hole opening 10a is sealed with the putty-like adhesive 13. As shown in FIG. Therefore, since an additional special member for sealing the hole opening 10a is not required, cost reduction can be achieved.

In addition, in the injection process using both pressurization and decompression, the process of decompressing the inside 10b of the anchor hole 10 is performed in parallel, and the inorganic grout material 34 is discharged from the exhaust pipe 20 to the exhaust hose 21. The evacuation by the vacuum pump 22 is stopped on the condition that the anchor hole 10 has come, and the step of reducing the pressure in the inside 10b of the anchor hole 10 is completed. In this way, the inorganic grout material 34 is prevented from flowing into the vacuum pump 22 by stopping the injection by the suction force due to the reduced pressure at an appropriate time. As a result, failure of the post-installation anchor installation system due to failure of the vacuum pump 22 can be prevented. In addition, by confirming that the inorganic grout material 34 has come out from the exhaust pipe 20 to the exhaust hose 21, it is possible to reliably know when to stop the injection, so that the inorganic grout to the anchor hole 10 can be confirmed. The injection work of the material 34 can proceed efficiently.

In addition, after the process of making the inside 10b of the anchor hole 10 decompressed, the injection of the inorganic grout material 34 by the pressurizing force is stopped, and the inorganic grout material 34 is injected into the anchor hole 10 using both pressurization and decompression. Complete the injection procedure. In this way, since the injection work can be performed appropriately, the injection work of the inorganic grout material 34 can be efficiently advanced. As a result, work can be labor-saving, and the burden on the worker can be reduced.

Further, in the post-treatment step, the portions protruding outside of the exhaust pipe 20 and the grout material injection pipe 30 are removed. As a result, the amount of members remaining in the interior 10b of the anchor hole 10 can be minimized, so that the amount of metal such as copper used can be reduced, and metal resources such as copper can be conserved. .

In addition, thin copper pipes are used as the exhaust pipe 20 and/or the grouting pipe 30 . As a result, the amount of members remaining in the interior 10b of the anchor hole 10 can be minimized, so that the amount of metal such as copper used can be reduced, and metal resources such as copper can be conserved. .

In addition, in the step of inserting the exhaust insertion portion 20a and the injection insertion portion 30a into the anchor hole 10, the length L5 from the exhaust insertion portion 20a to the hole depth 10c is set to 10 to 50 mm. In addition, the difference L4 between the length L2 of the injection insertion portion 30a and the length L3 of the discharge insertion portion 20a is sufficiently long. Therefore, the inorganic grout material 34 is injected without creating voids in the anchor holes 10 . As a result, the occurrence of rust after construction can be prevented.

Also, the mounting hole 40a of the steel bracket 4 is formed to be larger than the screw bolt 11 by 2 mm. Therefore, as the number of screw bolts 11 increases, the position of the mounting hole 40a needs to be more precise. By arranging the screw bolt 11 so as to be positioned at or near the cross-sectional central portion 10h of the anchor hole 10, the distal end portions 11a of the plurality of post-installed anchors X are formed to be substantially parallel. can issue As a result, the position of the mounting hole 40a of the steel bracket 4 is determined at the stage when the anchor hole 10 is drilled. You can start working on 4. As a result, the construction period can be shortened by at least about 1.5 months compared to the conventional method. In the conventional construction method of the post-installed anchor X, the position of the mounting hole 40a of the steel bracket 4 can be determined only at the stage when all the screw bolts 11 are attached, and it takes time to determine the center position of the tip portion 11a of the screw bolt 11. It took. Therefore, measuring the center position of the tip portion 11a of the screw bolt 11 and creating a drawing has been considerably delayed.

<Second embodiment>
A post-installed anchor construction method and a post-installed anchor construction system YA used therein according to a second embodiment of the present invention will be described with reference to FIGS. 15(A) and 15(B). The post-installed anchor XA is installed by the post-installed anchor installation method using the post-installed anchor installation system YA. In the post-installed anchor installation system YA, components having the same or similar functions as the components of the post-installed anchor installation system Y according to the first embodiment are denoted by the same reference numerals as in the post-installed anchor installation system Y. there is A detailed description of these will be omitted. In addition, in the post-installed anchor construction method using the post-installed anchor construction system YA, the same parts as the post-installed anchor construction method using the post-installed anchor construction system Y according to the first embodiment will be explained in detail. omitted.

As shown in FIG. 15A, the post-installed anchor installation system YA is different from the post-installed anchor installation system Y according to the first embodiment in that it has a grout material injection pipe 30A. The grout material injection pipe 30</b>A has an injection insertion portion 30</b>Aa for injecting the inorganic grout material 34 into the anchor hole 10 . The injection section 30Aa is attached to the vicinity of the hole opening 10a of the anchor hole 10, and has the same material as the injection section 30a.

As shown in FIG. 15(B), the injection insertion portion 30Aa is formed to have a curved flat cross-sectional shape. The curvature of the flattened concave curved portion 30Ad is formed to be greater than the curvature of the convex curved portion 30Ae. Curved flat shapes include, for example, crescent shapes. In the pipe insertion step, the injection insertion portion 30Aa is arranged such that the flat curved concave curved portion 30Ad contacts the outer peripheral surface 11c of the screw bolt 11, and the flat curved convex curved portion 30Ae contacts the inner surface 10f of the anchor hole 10. is inserted into the gap 10d so as to be in contact with the

According to the post-installed anchor installation method and the post-installed anchor installation system YA used in the method of the present embodiment, the same effects as those of the first embodiment can be obtained. Further, according to the present embodiment, when the injection insertion portion 30Aa is formed to have a curved flat cross-sectional shape, it is easy to fit the inner surface 10f of the anchor hole 10 and the outer peripheral surface 11c of the screw bolt 11. Even with the sized gap 10d, the cross section of the injection insertion portion 30Aa can be made larger. As a result, since the inorganic grout material 34 can be efficiently injected, the work can be labor-saving, and the burden on the operator can be reduced.

The invention is not limited to the content of the embodiments described above. The post-installed anchor installation method according to the present invention, the attachment attachment method using the same, and the specific configuration of the post-installed anchor installation system used for implementing them can be designed and changed in various ways.

The post-installed anchor installation method of the present invention, the method of attaching an attachment using the same, and the post-installed anchor installation system used for implementing them are when the anchor holes 10 are vertically drilled upward from the bottom surface of the skeleton. can also be applied. In this case, the inorganic grout material 34 is injected from the holes 10a on the lower surface.

X Post-construction anchor 1 Bridge pier (framework)
10 anchor hole 10a hole mouth (of anchor hole 10)
10b inside (of anchor hole 10)
10c deep hole (of anchor hole 10)
10d Gap 10f Inner surface (of anchor hole 10)
11 screw bolt (anchor bar)
11a Tip (of screw bolt 11)
11b Rear end (of screw bolt 11)
11c Outer peripheral surface (of screw bolt 11)
12 Supporting magnet (anchor bar support)
13 Putty-like adhesive 2 Exhaust path 20 Exhaust pipe 20a Exhaust insert (of exhaust pipe 20)
21 exhaust hose 22 vacuum pump 3 grout material injection path 30, 30A grout material injection pipe 30a, 30Aa injection insertion portion (of grout material injection pipe 30, 30A)
30c depression (of injection insert 30a)
30Ad Concave curved portion (of injection insertion portion 30Aa)
30Ae Convex curved portion (of injection insertion portion 30Aa)
31 grout material injection hose 32 grout material injection gun (grout material injection device)
34 Inorganic grout material

Claims (17)

A construction method for constructing a post-construction anchor on a skeleton,
An anchor hole drilling step of drilling an anchor hole in the skeleton;
an anchor muscle insertion step of inserting the anchor muscle into the anchor hole such that the distal end portion of the anchor muscle is exposed to the outside from the opening of the anchor hole;
a pipe insertion step of inserting an exhaust insertion portion of an exhaust pipe and an injection insertion portion of a grout material injection pipe into a gap formed between the inner surface of the anchor hole and the outer peripheral surface of the anchor bar;
an exhaust path forming step of joining the exhaust pipe and the vacuum pump to form an exhaust path for discharging air from the inside of the anchor hole;
a grout material injection path forming step of joining the grout material injection pipe and the grout material injection device to form a grout material injection path for injecting the inorganic grout material into the interior of the anchor hole;
a depressurization step of driving the vacuum pump to exhaust the air from the interior of the anchor hole through the exhaust pipe, thereby decompressing the interior of the anchor hole;
A pressurizing force is generated by driving the grouting material injection device, and the pressurizing force and the suction force generated by the decompressed state are used together to direct the grouting material from the grouting material injection pipe to the inside of the anchor hole. A grout material pressurization and decompression combined injection step of injecting an inorganic grout material;
construction method. The construction method according to claim 1, wherein the grout material pressurization/decompression combined injection step is started on condition that the inside of the anchor hole has a predetermined degree of pressure reduction in the decompression step. 3. The construction method according to claim 2, wherein the predetermined degree of pressure reduction generated by the pressure reduction step is -0.07 Mpa or less. In the anchor bar insertion step, an anchor bar support is attached to the outer peripheral surface of the anchor bar at or near the rear end of the anchor bar, and the anchor bar is inserted at the center of the cross section of the anchor hole or in the vicinity of the depth of the anchor hole. The construction method according to any one of claims 1 to 3, which is arranged so as to be located in the vicinity thereof. 5. The pipe insertion step according to any one of claims 1 to 4, wherein the exhaust insertion section is inserted into the anchor hole to the depth of the hole or its vicinity, and the injection insertion section is shallowly inserted into the hole mouth. construction method. In the pipe insertion step, the anchor bar is supported at the hole opening by the exhaust insertion section and the injection insertion section inserted into the gap so as to be positioned at or near the center of the cross section of the anchor hole. The construction method according to any one of claims 1 to 5, wherein 7. The construction method according to claim 6, wherein said support of said anchor bar is performed by arranging said exhaust insertion section and said injection insertion section in said gap. 8. The construction method according to claim 7, wherein the spaced apart arrangement is performed by opposing the exhaust insertion section and the injection insertion section with the anchor bar interposed therebetween. The construction method according to any one of claims 6 to 8, wherein the support of the anchor bar is performed by temporarily fixing the exhaust insertion section and the injection insertion section. In the pipe insertion step, the injection insertion portion is formed to have a curved flat cross-sectional shape, and the concave curved portion of the curved flat shape is in contact with the outer peripheral surface of the anchor bar and is curved. The construction method according to any one of claims 1 to 9, wherein the anchor hole is inserted into the gap so that the flattened convex curved portion is in contact with the inner surface of the anchor hole. In the pipe inserting step, the injection insertion portion is formed to have a heart-shaped cross section, and the side having the heart-shaped recess is in contact with the outer peripheral surface of the anchor bar and has the heart shape. 10. The construction method according to any one of claims 1 to 9, wherein the anchor hole is inserted into the gap so that the side without the recess is in contact with the inner surface of the anchor hole. Claims 1 to 3, wherein in the pipe inserting step, the hole opening is sealed with a putty-like adhesive while the anchor bar, the exhaust pipe, and the grout material injection pipe are inserted into the anchor hole. 12. The construction method according to any one of 11. In the exhaust path forming step, the exhaust pipe and the vacuum pump are joined via an exhaust hose,
In the grout material pressurization and decompression combined injection step, the decompression step is performed in parallel, and the evacuation by the vacuum pump is performed on the condition that the inorganic grout material has come out from the exhaust pipe to the exhaust hose. The construction method according to any one of claims 1 to 12, wherein the work is stopped and the depressurization step is terminated. 14. The construction method according to claim 13, wherein after the depressurization step is completed, the injection of the inorganic grout material by the pressurizing force is stopped, and the grout material pressurization/decompression combined injection step is terminated. After the grout material pressurization and depressurization combined injection process is completed, when the inorganic grout material is hardened, a post-treatment process is further performed for removing the portions of the exhaust pipe and the grout material injection pipe that protrude from the anchor hole. The construction method according to claim 14, comprising: A method for attaching an accessory, comprising the step of attaching an accessory to the skeleton using the construction method according to any one of claims 1 to 15. A post-installed anchor installation system used for carrying out the installation method according to any one of claims 1 to 15 or the method for attaching an appendage according to claim 16.

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