JP2005060939A - Removing device for existing anchor member, removing method, and repair method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a removing device for an anchor member capable of improving work efficiency when replacing the anchor member and obtaining sufficient connection strength to a foundation of an anchor member to be constructed newly and to provide a removing method and a repair method. <P>SOLUTION: High pressure injection water is jetted to a foundation part 1 around the anchor member 2 together with rotation of a nozzle head from a nozzle 31 formed in the nozzle head 13. Chipping action is efficiently given to the foundation part around the anchor member by high pressure jet water jetted from the nozzle 31. As a result, the existing anchor member 2 can be removed in a short time. In the repair method for the anchor member, a new anchor member is buried by utilizing a chipping hole. In this case, a face of the chipping hole is put into an adequately roughened condition by high pressure jet water to ensure construction strength of the anchor member to be replaced newly sufficiently. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is, for example, a removal device and a removal method for removing an anchor member already embedded in a foundation portion such as concrete by a so-called water jet method, and a suspension hole left in the foundation portion from which the existing anchor member has been removed. It is related with the repair method of the anchor member which constructs an anchor member newly inside.
[0002]
[Prior art]
When attaching a structure or the like on a foundation made of concrete or the like, first, an anchor member is embedded in a concrete frame as a foundation, and means for attaching the structure to the foundation using the anchor member is employed. Conventional anchor members used for the attachment means described above can be roughly classified into post-installed anchors and embedded set anchors.
[0003]
For example, the former post-construction anchor is known to be composed of, for example, a base pipe formed with a plurality of slits on the tip end side, and a conical pin member accommodated on the tip end side of the base pipe. It is made to drive this into the concrete concrete base. That is, when the base pipe and the pin member are driven into the concrete frame, the pin member spreads the tip end portion of the base pipe in which the slit is formed in a fan shape in cross section, thereby improving the pullout strength of the anchor member.
[0004]
On the other hand, with respect to the latter embedded set anchor, for example, when placing concrete such as concrete, a plate anchor and an anchor main body formed so as to be orthogonal thereto are embedded, and the end of the anchor main body is embedded. The part is formed so as to protrude from the concrete frame.
[0005]
In any of the above-described conventional post-installed anchors or embedded set anchors, stainless steel or steel is used as the material, and it is inevitable that rust, corrosion, etc. will progress in concrete due to long-term use. Therefore, according to the above-described anchor member made of a metal, there is a problem that the reliability after construction varies, for example, the bond strength to the foundation gradually decreases.
[0006]
Therefore, in recent years, in order to avoid the above-described problems, ceramic anchor members are provided. Therefore, existing anchor members made of existing stainless steel or steel materials are removed, and rust, corrosion, etc. are generated. There has also been a desire to replace the above-described ceramic anchor member.
[0007]
FIG. 1 shows a conventional method for removing an existing anchor member applied to a concrete frame. That is, FIG. 1A shows a state in which the post-execution anchor is embedded in a concrete frame as a foundation, reference numeral 1 indicates a concrete frame, and reference numeral 2 indicates an anchor member. To remove the existing anchor member 2 embedded in the concrete housing 1 as shown in FIG. 1A, a core cutter 3 made of diamond abrasive grains formed in a cylindrical shape is used as shown in FIG. Then, by rotating this so as to surround the anchor member 2, the concrete housing 1 is provided with a cylindrical groove 1a.
[0008]
Subsequently, as shown in FIG. 1 (c), a tool 4 such as a wedge is inserted into a part of a cylindrical groove 1a formed in the concrete casing 1 by the core cutter 3, and this is applied with a hammer or the like (not shown). By hitting, the active surface at the bottom of the groove 1a can be destroyed. Therefore, as shown in FIG. 1 (d), the existing anchor member 2 can be removed together with a part of the concrete casing that surrounds the periphery.
[0009]
Subsequently, in order to construct a new ceramic anchor as an anchor member, the inside of the cylindrical suspension hole 1b from which the existing anchor member 2 is removed is repaired, and then an adhesive such as cement mortar is injected. And the repair work of an anchor member can be complete | finished by driving a ceramic anchor in the said part. And it becomes possible to utilize a novel anchor member by waiting for hardening of the adhesive.
[0010]
In addition, as described above, a rotary core cutter using diamond abrasive grains and a conventional method for applying a cylindrical groove to a concrete frame using the core cutter are disclosed in Patent Document 1 shown below.
[0011]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-44133 (paragraphs 0007 to 0009, FIG. 1)
[0012]
[Problems to be solved by the invention]
By the way, according to the construction method using the core cutter with diamond abrasive grains as disclosed in Patent Document 1 described above, it takes a very long time to apply the cylindrical groove 1a to the concrete casing 1 with the core cutter. There is a technical problem that the efficiency cannot be improved. In addition, since the suspension surface by the core cutter is made very smooth, the adhesion strength at the time of repair is not sufficiently obtained, and there is a technical problem that the strength of the newly replaced anchor member remains uneasy. I will let you.
[0013]
The present invention has been made by paying attention to the above-described conventional technical problems, and can greatly improve the working efficiency when replacing the anchor member, and can also be used as a foundation part of an anchor member to be newly constructed. It is an object of the present invention to provide an anchor member removing apparatus, removing method, and repairing method capable of sufficiently obtaining a bonding strength with respect to.
[0014]
[Means for Solving the Problems]
The anchor member removing device according to the present invention, which has been made to achieve the above-mentioned object, is connected to a hollow rotating shaft to which high-pressure water is supplied, as defined in claim 1, and the axis of the rotating shaft. A nozzle capable of discharging high-pressure jet water at a position deviated from the nozzle is formed, and the nozzle head formed with the nozzle is engaged with an existing anchor member embedded in a base portion, and the anchor member It is characterized in that positioning means capable of discharging high-pressure jet water from the nozzle toward the base portion around the nozzle is provided.
[0015]
In this case, in one preferable form of the positioning means, as described in claim 2, the positioning means is attached to the rotating shaft core of the nozzle head and abuts against a central recess in an existing anchor member embedded in the base portion. It is set as the structure which comprised the contact member which can do. In another preferred form of the positioning means, as described in claim 3, the protruding shaft of the existing anchor member formed in the rotating shaft core of the nozzle head and embedded in the base portion is accommodated. It is set as the structure which formed the recessed part which can be.
[0016]
According to the anchor member removing apparatus having the above-described configuration, the nozzle head connected to the hollow rotating shaft to which high-pressure water is supplied is provided with positioning means that can engage with the existing anchor member. Therefore, the high-pressure jet water can be accurately discharged from the nozzle to the surrounding base portion around the existing anchor member. Therefore, even when a new anchor member is laid after removing the existing anchor member, the new anchor member can be accurately laid at the original position.
[0017]
On the other hand, the anchor member removing apparatus according to the present invention further comprises a case member capable of covering the nozzle head and a base portion around the anchor member, as defined in claim 4, It is desirable to connect a vacuum hose that sucks the inside of the case member to a negative pressure. As described above, this configuration can effectively prevent the high-pressure jet water from the nozzle and the concrete material or the like constituting the foundation portion suspended from being scattered outside, and the suspension portion and its surroundings. It is also possible to effectively prevent contamination.
[0018]
Furthermore, in a preferred embodiment of the anchor member removing apparatus according to the present invention, as described in claim 5, the hollow rotary shaft to which the high-pressure water is supplied is provided by an air motor that obtains rotational power by air pressure. It is configured to be driven to rotate. According to the configuration using the above-described air motor, it is possible to obtain a power source relatively easily even in an outdoor work where it is difficult to quickly prepare electrical equipment.
[0019]
Moreover, the removal method of the existing anchor member concerning this invention made | formed in order to achieve the above-mentioned objective is connected with the hollow-shaped rotating shaft to which high pressure water is supplied, and the said rotating shaft as described in Claim 6. A step of causing a nozzle head formed with a nozzle capable of discharging high-pressure jet water to a position deviated from the axial center of the shaft to a base portion in which an anchor member is embedded, together with a rotating operation of the hollow rotary shaft, By performing the discharge operation of the high-pressure jet water from the nozzle, the step of suspending the base portion around the anchor member with the high-pressure jet water and removing the anchor member from the base portion is performed. Has characteristics.
[0020]
In this case, as described in claim 7, during the suspension operation of the foundation portion by the high-pressure jet water, at least the nozzle head and the foundation portion on which the suspension operation is performed are bent to perform a suction operation. It is desirable to be executed.
[0021]
According to the above-described method for removing the existing anchor member according to the present invention, since the nozzle formed on the nozzle head discharges high-pressure jet water to the base portion around the anchor member as the nozzle head rotates, The discharged high-pressure jet water can efficiently give a suspension operation to the base portion around the anchor member. As a result, the existing anchor member can be removed in a short time.
[0022]
In addition, the nozzle head and the base portion on which the suspending operation is performed are bent and the suction operation is performed, so that the high-pressure jet water discharged from the nozzle and the base portion suspended thereby. It is possible to effectively prevent the concrete material or the like constituting the material from scattering to the outside, and to prevent the suspended portion and its surroundings from being contaminated.
[0023]
Furthermore, in the repair method of the anchor member according to the present invention made to achieve the above-described object, the existing anchor member is removed as described in claim 8 following execution of the above-described method for removing the existing anchor member. A step of loading a fixing material into the suspension hole left in the foundation portion, and an anchor member newly constructed in the suspension hole is inserted, and the anchor member is embedded and fixed in the suspension hole by the fixing material. It is characterized in that the process is executed.
[0024]
In this case, as described in claim 9, the fixing material loaded in the suspension hole is filled in the capsule in advance, and the newly-constructed anchor member is inserted into the suspension hole to destroy the capsule. A means for enclosing the fixing material between the suspension hole and the anchor member can be preferably employed. Further, in this case, as described in claim 10, the fixing material loaded in the suspension hole may employ means for injecting the fixing material into the suspension hole by using an injection tool that accommodates the fixing material. it can.
[0025]
And as for the anchor member newly constructed utilized in the above-mentioned repair method, it is desirable for at least one part of an anchor member to be comprised with the ceramic member provided with the internal thread part as described in Claim 11. .
[0026]
By adopting the above-described repair method of the anchor member, a new anchor member can be applied to the foundation portion using the suspension hole from which the existing anchor member has been removed. In this case, since the suspension hole is formed by high-pressure jet water, that is, the water jet method, the suspension surface is made to be in a moderately rough state, thereby sufficiently securing the construction strength of the newly replaced anchor member. It becomes possible to do.
[0027]
On the other hand, when constructing a new anchor member in the suspension hole, it is preferable to use a capsule filled with a fixing material. According to this, the capsule is broken by inserting the capsule into the suspension hole, and further driving the anchor member to be newly constructed into the suspension hole using, for example, a hammer or a hammer drill, The fixing material in the capsule is filled without a gap between the suspension hole and the anchor member.
[0028]
Furthermore, by using a ceramic anchor member as a newly constructed anchor, it will not cause rust, corrosion, etc. in the foundation of the foundation even after long-term use, and it will be connected to the foundation after renovation Sufficient reliability of strength can be ensured.
[0029]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the removal device using the existing anchor member removal apparatus and the removal method using the same according to the present invention will be described first, and further, the repair method for constructing a new existing anchor member in the suspension hole from which the existing anchor member has been removed will be described. To do.
[0030]
FIG. 2 shows the entire configuration of the removing apparatus to which the present invention is applied in a partially broken state. Reference numerals 1 and 2 denote a concrete frame as a foundation already described and an existing embedded structure in the concrete casing. An anchor member is shown. Reference numeral 11 denotes an anchor member removing device having a high-pressure water injection means. The device 11 includes a case member 12 whose outer shape is a truncated cone shape. The nozzle head 13 is supported via a hollow rotating shaft 14.
[0031]
A large-diameter spur gear 16 is attached to the hollow rotating shaft 14 in a gear box 15 formed on the upper portion thereof. The rotational driving force received by the spur gear 16 causes the nozzle head 13 to move horizontally. It is configured to be rotated in the direction. The upper end of the hollow rotary shaft 14 is rotatably connected to a high-pressure water supply pipe 17 via a sealing mechanism (not shown) that prevents high-pressure water from leaking. A high pressure hose 18 is connected to the supply pipe 17, and high pressure water from a special vehicle (not shown) is supplied via the high pressure hose 18.
[0032]
With this configuration, high-pressure water sent via the high-pressure hose 18 is supplied to the nozzle head 13 via the supply pipe 17 and the hollow rotary shaft 14. The specific configuration of the nozzle head 13 will be described later in detail.
[0033]
On the other hand, compressed air is supplied from the above-described special vehicle or the like through an air hose 20, and this compressed air is supplied to an air motor 21 to actuate the air motor 21 to rotate. To do. A small-diameter spur gear 22 is directly connected to the air motor 21, and the small-diameter spur gear 22 directly connected to the air motor 21 is attached to the hollow rotating shaft 14 in the gear box 15. It meshes with the large-diameter spur gear 16 and functions to rotationally drive the rotary shaft 14.
[0034]
The rotation speed of the air motor 21 can be adjusted in accordance with the supply amount of compressed air. Therefore, although not shown in the drawing, the supply amount of air to the air motor 21 can be adjusted. It is desirable that a valve capable of being arranged and configured to be operated.
[0035]
Further, a vacuum hose 24 is connected to the case member 12 at the side wall thereof. Therefore, the inside of the case member 12 is set to a negative pressure state by the vacuum hose 24. Further, a seal member 25 made of, for example, a belt-like rubber material is attached to the lower end edge of the case member 12 along the lower end edge. With this configuration, the high-pressure jet water discharged from the nozzles, which will be described later, provided in the nozzle head 13 and the concrete material constituting the foundation portion to be suspended are scattered outside due to the presence of the case member 12. Is effectively prevented.
[0036]
Further, since the inside of the case member 12 is subjected to a suction action by the vacuum hose 24, the concrete material and the spray water generated by the above-described suspension operation can be sucked by the vacuum hose 24, and the suspension part and its surroundings are contaminated. Can be prevented.
[0037]
Next, FIG. 3 mainly shows the configuration of the nozzle head 13 described above. As described above, the nozzle head 13 is rotatably supported via the hollow rotating shaft 14 to which high-pressure water is supplied. Has been. FIG. 3 (a) shows an example in which positioning means is applied to the nozzle head 13 corresponding to a so-called female anchor among the post-construction anchors, and FIG. 3 (b) shows the post-construction anchors. Of these, an example in which positioning means is formed on the nozzle head 13 in correspondence with a so-called male anchor is shown.
[0038]
As shown in FIGS. 3A and 3B, a flow path 13a is formed in the nozzle head 13 to separate the high-pressure water supplied through the rotating shaft 14 in the horizontal direction. Each of the divided flow paths is bent again in the direction directly below in the nozzle head 13 to form a pair of high-pressure water discharge nozzles 31 at the lower end thereof.
[0039]
In other words, in this embodiment, the pair of discharge nozzles 31 are formed at left and right target positions at positions deviated from the axis of the hollow rotating shaft 14, and are discharged from each nozzle 31. The discharge trajectories of high-pressure water indicated by chain lines are configured to be parallel to each other directly below the nozzle head 13.
[0040]
Therefore, when the nozzle head 13 is rotationally driven with the rotary shaft 14 as an axis, the discharge trajectory of the high-pressure water by the pair of discharge nozzles 31 is the same on the surface of the concrete frame 1 as a foundation. It will pass on the true circle.
[0041]
The discharge pressure of the high-pressure water from each discharge nozzle 31 is preferably 2000 to 2500 Kgf / cm. ² Adjusted to degree. The discharge pressure is 2000 kgf / cm. ² Even if it is below, it is possible to give a sufficient suspending action to the concrete casing 1 as a foundation, and the discharge pressure is 2500 kgf / cm. ² Even if it is made above, the effects described below can be sufficiently obtained.
[0042]
Here, as shown in FIG. 3A, the positioning means applied to the nozzle head 13 corresponding to the female anchor has one end portion in the shaft hole 33 provided in the rotational axis of the nozzle head 13. A bolt 34 screwed in, a nut 35 screwed onto the bolt 34 and fastened together at the lower end surface of the nozzle head 13, and a dish rotatably attached to a reduced diameter portion on the other end side of the bolt 34 And a second nut 37 that is screwed into the other end side of the bolt 34 and functions as a retaining member for the contact member 36.
[0043]
And in implementing the operation | work which removes the existing anchor 2 from the concrete frame 1 as a foundation, as shown to Fig.3 (a), the said plate-shaped contact member 36 which comprises a positioning means is used for the existing anchor. The nozzle head 13 can be set (positioned) at an optimum position by contacting the central recess of the member 2 from directly above.
[0044]
On the other hand, as shown in FIG. 3B, the positioning means applied to the nozzle head 13 corresponding to the male anchor has a concave portion 39 formed in the rotational axis of the nozzle head 13, and this concave portion is formed. The projecting shaft 2a of the existing anchor member 2 is accommodated in the portion 39 so as to be positioned.
[0045]
Regardless of which positioning means shown in FIGS. 3A and 3B is employed, the nozzle head 13 is driven to rotate by the power of the air motor 21 shown in FIG. The high pressure water can be accurately discharged from the pair of nozzles 31 around the existing anchor member 2 toward the concrete casing 1 around the existing anchor member 2.
[0046]
Due to this action, the concrete casing 1 is subjected to the suspending action by the high-pressure jet water, and the concrete casing 1 is removed around the existing anchor member 2. At this time, the high-pressure jet water discharged from the nozzle 31 is bent in all directions while holding the concrete housing 1. Therefore, the concrete housing 1 around the existing anchor member 2 is decomposed into particles, and the hanging surface of the concrete housing 1 is appropriately roughened.
[0047]
Therefore, even when laying a new anchor member, it is possible to accurately lay it at the original anchor position by the action of the positioning means described above. Moreover, as described above, the suspension surface of the concrete housing 1 is appropriately set. Since it is made into the roughened state, it is possible to sufficiently obtain the bonding strength with respect to the foundation of the newly replaced anchor member.
[0048]
Incidentally, in a state where the anchor member 2 having a length of less than 100 mm is embedded, as shown in FIG. 1, a cylinder having a depth necessary for the concrete casing 1 is obtained using the core cutter 3 formed in a cylindrical shape. The time required for forming the groove 1a is about 10 minutes. On the other hand, as described above, the time required to remove the existing anchor member of the same size with the high-pressure jet water is about 2 minutes or less. Therefore, when the anchor member removal method according to the present invention is adopted. Can greatly improve its work efficiency.
[0049]
Next, FIG. 4 shows an example in which positioning means is applied to the nozzle head 13 corresponding to an existing embedded set anchor. As already described, the existing embedded set anchor shown in FIG. 4 embeds the plate anchor 2B and the anchor main body 2A formed so as to be orthogonal thereto when placing concrete as a foundation. The upper end of the anchor body 2a is formed so as to protrude from the concrete housing 1.
[0050]
As a preferable configuration of the positioning means corresponding to the embedded set anchor having the above-described configuration, a configuration similar to that shown in FIG. That is, as shown in FIG. 4, the nozzle head 13 can be positioned by accommodating the upper end portion of the anchor body 2 </ b> A in the recessed portion 39 using the recessed portion 39 formed in the nozzle head 13. . When the positioning means described above is used, it is possible to obtain the same effect as the configuration of FIG.
[0051]
However, in the embedded set anchor shown in FIG. 4, a part of the plate anchor 2B is left in the concrete housing 1 as shown on the left side of the figure, and the anchor main body 2A formed so as to be orthogonal to the plate anchor 2B is provided. The cylindrical shape is established in the suspension hole 1b. Accordingly, the anchor main body 2A is cut at the portion indicated by the arrow X in the drawing, for example, with a hydraulic cutter or the like, the inside of the cylindrical hole 1b is repaired in this state, and the ceramic anchor is newly placed as described above. To be made.
[0052]
In the embodiment according to the removing device 11 described above, a pair of nozzles is formed in the nozzle head as described above, but the number of nozzles is one, or three or more as required. Sometimes formed. Further, a nozzle for high-pressure water injection may be further formed inside the pair of nozzles.
[0053]
Thus, by using the anchor member removing device 11 described above, the existing anchor member can be efficiently removed from the base portion 1 such as a concrete frame. And in the repair method of the anchor member by this invention, a new anchor member is constructed using the suspension hole 1b formed in the foundation parts 1, such as a concrete frame, with the above-mentioned removal apparatus 11. FIG.
[0054]
5-7 demonstrates the repair method of the anchor member concerning this invention which constructs a new anchor member using the above-mentioned suspension hole 1b. FIG. 5 shows a preferred form of anchor member used for the repair and the first construction method. First, FIG. 5 (a) shows a preferred form of an anchor member used in the refurbishing method of the present invention. The anchor member 41 includes a fixing jig portion 42 made of a synthetic resin material and a ceramic material. The anchor main body portion 43 is formed, and the cap portion 44 is made of a synthetic resin material.
[0055]
As will be described later, the fixing jig portion 42 is formed in a cylindrical shape by forming a through hole through which a mounting bolt is inserted in the axial direction, and a spiral uneven portion is formed on the surface thereof. ing. And the cylindrical protrusion 42a is formed in the one end part, and it is comprised so that it can fit in the internal diameter part of the anchor main-body part 43 demonstrated below. As described above, the anchor main body 43 is formed of a ceramic material, and a spiral uneven portion is formed on the surface thereof. As will be described later, a female screw into which the male screw of the mounting bolt is screwed is formed along the axial direction. The cap portion 44 is formed with a cap shape at one end, and a cylindrical protrusion 44a is formed at the other end. The protrusion 44a can be fitted to the inner diameter portion of the anchor main body 43 described above. It is configured as follows.
[0056]
FIG. 5B shows a state in which the anchor member 41 is assembled with the anchor main body 43 formed of a ceramic material as the center. In other words, the cylindrical protrusion 42 a formed on the fixing jig portion 42 is fitted to the inner diameter portion at one end of the anchor main body portion 43, and the inner diameter portion at the other end of the anchor main body portion 43 is fitted. Is fitted with a cylindrical protrusion 44 a formed on the cap portion 44. Thereby, the anchor member 41 shown in FIG.5 (b) can be assembled.
[0057]
The anchor member 41 assembled as shown in FIG. 5 (b) is embedded and fixed using the suspension hole 1b formed in the base portion 1 such as the concrete frame already described. In this case, in the first construction method shown in FIG. 5, a capsule previously filled with a fixing material is used. That is, when the anchor member 41 is newly constructed, the capsule 46 is immersed in water for a predetermined time as shown in FIG. Thereby, moisture permeates the fixing material in the capsule 46, that is, the cement mortar inorganic fixing material 47, and an appropriate water ratio is obtained.
[0058]
The capsule 46 soaked in water and infiltrated with water at an appropriate water ratio is inserted into the suspension hole 1b as shown in FIG. 5 (d). Subsequently, as shown in FIG. 5 (d), a new anchor member 41 is inserted into the suspension hole 1 b with the cap portion 44 first. In this case, the capsule 46 is destroyed by driving the end portion of the anchor member 41, that is, the end portion of the fixing jig portion 42 toward the suspension hole 1b using, for example, a hammer or a hammer drill. The inner fixing material 47 is filled between the suspension hole 1b and the anchor member 41 without any gap. Then, by waiting for the fixing material 47 to solidify (about 30 minutes), a new anchor member 41 can be used.
[0059]
FIG. 6 is a cross-sectional view showing an example in which a structure or the like is attached using the anchor member 41 modified as described above. As shown in FIG. 6, the fixing bolt 47 is inserted into the anchor member 41 embedded and fixed in the suspension hole 1 b with a mounting bolt 50 having a male screw 50 a formed in the vicinity of the tip. In this case, a metal plate 51 serving as a foundation of a structure or the like is inserted in the mounting bolt 50 in advance.
[0060]
The mounting bolt 50 is inserted into a through hole 42b formed in the fixing jig portion 42 constituting the anchor member 41, and the male screw 50a formed near the tip of the mounting bolt 50 is connected to the anchor body. Screwed into a female screw 43 a formed on the inner diameter portion of the portion 43. As a result, the metal plate 51 is fixed to the foundation portion 1 such as a concrete frame.
[0061]
Next, FIG. 7 shows a second construction method used in the repair method of the present invention. In the second construction method, the fixing material 47 is injected into the suspension hole 1b already described by the injection tool. That is, as shown in FIG. 7A, the injection tool 53 used in this embodiment has a fixing material 47 accommodated therein and a fixing material 47 via a pipe-shaped nozzle 53a communicating therewith. Is configured to be discharged.
[0062]
Therefore, as shown in FIG. 7A, the fixing material 47 is injected into the innermost part of the suspension hole 1b using the pipe-shaped nozzle 53a, and subsequently, as shown in FIG. By driving the assembled anchor member 41 toward the suspension hole 1b, the fixing material 47 injected into the suspension hole 1b can be filled with no gap between the suspension hole 1b and the anchor member 41. it can. Then, by waiting for the fixing material 47 to solidify, a new anchor member 41 can be used. Even if the construction method shown in FIG. 7 is adopted, the anchor function similar to the configuration shown in FIG. 6 can be provided as a result.
[0063]
According to the method for repairing an anchor member according to the present invention shown in FIGS. 5 to 7, a new anchor member can be applied to the foundation portion by using the suspension hole from which the existing anchor member has been removed. And, as described above, by forming the suspension hole by the so-called water jet method, the suspension surface can be appropriately roughened, so that the construction strength of the newly replaced anchor member is sufficiently secured. It becomes possible to do.
[0064]
Furthermore, by using a ceramic anchor member as a newly constructed anchor, it will not cause rust, corrosion, etc. in the foundation of the foundation even after long-term use, and it will be connected to the foundation after renovation Sufficient reliability of strength can be ensured.
[0065]
In addition, in the repair method of the anchor member demonstrated based on FIGS. 5-7, although existing anchor member is removed as an example and it replaces | exchanges for a new ceramic anchor member, it is newly made from metal. Of course, the present invention can be similarly adopted even when the anchor member is replaced. Moreover, in the form shown in FIG. 7, although most of the full length of the anchor member 41 newly constructed is made to be embedded in the suspension hole 1b, the embedding depth of this anchor member is necessary. It can be appropriately adjusted according to the strength.
[0066]
【The invention's effect】
As is apparent from the above description, according to the existing anchor member removing apparatus and removing method according to the present invention, the nozzle formed in the nozzle head is pressurized against the base portion around the anchor member as the nozzle head rotates. Since the jet water is discharged, the high-pressure jet water discharged from the nozzle can efficiently give a suspension operation to the foundation portion around the anchor member. As a result, the existing anchor member can be removed in a short time.
[0067]
Moreover, according to the anchor member repairing method according to the present invention, a new anchor member is embedded using the suspension hole formed by the high-pressure jet water. Therefore, the surface of the suspension hole can be appropriately roughened by the high-pressure jet water, and the construction strength of the anchor member to be newly replaced can be sufficiently secured.
[Brief description of the drawings]
FIG. 1 is a schematic view showing a conventional method for removing an existing anchor member applied to a concrete frame.
FIG. 2 is a partially cutaway view showing an overall configuration of a removing apparatus to which the present invention is applied.
FIG. 3 is a side view showing an example of a nozzle head and its positioning means constituting the removing device shown in FIG. 2;
FIG. 4 is a side view showing another example of the nozzle head and its positioning means.
FIG. 5 is a process diagram showing a form of an anchor member and a first construction method for constructing a new anchor member.
FIG. 6 is a cross-sectional view showing an embedded state of an anchor member that has been constructed.
FIG. 7 is a process diagram showing a second construction method of the anchor member.
[Explanation of symbols]
1 Concrete frame (foundation)
1b is a suspension hole
2 Anchor members
2A Anchor body
2B Plate anchor
11 Anchor member removal device (high pressure water injection means)
12 Case material
13 Nozzle head
14 Hollow shaft
18 High pressure hose
20 Air hose
24 vacuum hose
31 nozzles
36 Plate-shaped contact member (positioning means)
39 Concave part (positioning means)
41 Anchor member
42 Fixing jig
43 Anchor body
43a Female thread
44 Cap part
46 capsules
47 Fixing material
50 Mounting bolt
50a male thread
51 metal plate
53 Fixing material injection tool

Claims (11)

A nozzle head connected to a hollow rotating shaft to which high-pressure water is supplied and capable of discharging high-pressure jet water at a position deviated from the axis of the rotating shaft, and a nozzle head in which the nozzle is formed Is provided with positioning means that engages with an existing anchor member embedded in the base portion and discharges high-pressure jet water from the nozzle toward the base portion around the anchor member. A device for removing an existing anchor member. The said positioning means was equipped with the contact member attached to the rotating shaft center of the said nozzle head, and abutting member which can be contact | abutted to the center recessed part in the existing anchor member embed | buried under the base part. The existing anchor member removal apparatus as described. 2. The positioning means is formed of a recessed portion that is formed on a rotating shaft core of the nozzle head and can accommodate a protruding shaft of an existing anchor member embedded in a base portion. The removal apparatus of the existing anchor member as described in any one of. The nozzle head and a case member capable of covering a base portion around the anchor member are further provided, and a vacuum hose for sucking the inside of the case member to a negative pressure is connected to the case member. The apparatus for removing an existing anchor member according to any one of claims 1 to 3. The existing anchor according to any one of claims 1 to 4, wherein the hollow rotating shaft to which the high-pressure water is supplied is configured to be rotationally driven by an air motor that obtains rotational power by air pressure. Member removal device. A foundation in which an anchor member is embedded in a nozzle head that is connected to a hollow rotating shaft to which high-pressure water is supplied and that can discharge high-pressure jet water at a position off the axis of the rotating shaft. A process of confronting the part,
The base portion around the anchor member is suspended by the high-pressure jet water by performing a discharge operation of the high-pressure jet water from the nozzle together with the rotation operation of the hollow rotating shaft, and the anchor member is moved to the base portion. Removing from
The method for removing the existing anchor member is characterized in that is executed. The suction operation is performed by bending at least the nozzle head and the foundation portion on which the suspension operation is performed during the suspension operation of the foundation portion by the high-pressure jet water. 7. A method for removing an existing anchor member according to 6. A foundation in which an anchor member is embedded in a nozzle head that is connected to a hollow rotating shaft to which high-pressure water is supplied and that can discharge high-pressure jet water at a position off the axis of the rotating shaft. A process of confronting the part,
The base portion around the anchor member is suspended by the high-pressure jet water by performing a discharge operation of the high-pressure jet water from the nozzle together with the rotation operation of the hollow rotating shaft, and the anchor member is moved to the base portion. Removing from
Loading a fixing material into a suspension hole left in the base portion from which the anchor member has been removed;
Inserting the anchor member newly constructed in the suspension hole, and fixing the anchor member embedded in the suspension hole by the fixing material;
A method of repairing an anchor member comprising: The fixing material loaded in the suspension hole is filled in the capsule in advance, and the capsule is broken by the insertion of the newly installed anchor member into the suspension hole. The method for repairing an anchor member according to claim 8, wherein the anchor member is encapsulated in between. 9. The method for repairing an anchor member according to claim 8, wherein the fixing material loaded in the suspension hole is injected into the suspension hole using an injection tool that accommodates the fixing material. The at least part of the anchor member embedded and fixed in the suspension hole depending on the fixing material is constituted by a ceramic member provided with a female screw portion. Anchor member repair method.

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