JP6768213B2 - Existing hollow pipe repair method - Google Patents

Description

The present invention relates to an existing hollow pipe repair member and an existing hollow pipe repair method for repairing a corroded portion generated near the root of a pole made of a hollow pipe embedded in a concrete foundation.

Conventionally, structures in which hollow pipes are embedded in concrete foundations are buried in various places.
These hollow pipes gradually deteriorate with the passage of time, the roots of the existing hollow pipes embedded in the concrete foundation are corroded, and the strength of the structure is significantly reduced.
In such a case, the existing hollow tube arising of corrosion, techniques for repairing without the hassle has been required.

Patent Document 1 discloses an invention relating to a handrail strut repair method for restoring a corroded handrail strut to its original shape under the name of "handrail strut repair method".
The invention disclosed in Patent Document 1 is a method for repairing a handrail strut for repairing a partially corroded existing handrail strut, in which a corroded portion of the strut is cut and removed, and the cut portion is removed. A reinforcing bar member that welds and joins the upper support column that is not provided and the base plate that is buried in the ground and a connecting plate that is divided into two are installed, and each of the connecting plates that are divided into two contains a welded auxiliary plate. It is fitted and each of the supporting plates is arranged so as to project from each connecting plate to the upper support column, and one supporting plate is arranged so as to project toward the other connecting plate side, and each connecting plate is inserted into the cut portion. In this state, by welding and joining the mating surfaces of the respective connecting plates, between each connecting plate and the upper support column, and between each connecting plate and the ground, the same as the support column at the time of new construction. It is characterized in that it can maintain strength.
According to the invention disclosed in Patent Document 1 having the above configuration, the corroded portion is cut and a reinforcing member and a connecting plate formed in two parts are installed at the cut portion. When the base plate is buried in the ground, a reinforcing bar as a reinforcing member joins the base plate and the upper support of the main body support, and joins each connecting plate and the connecting plate and the upper support by welding. Each of the supporting plates is joined to the upper support column, and the connecting plates divided into two are firmly joined to each other. As a result, the repaired pillar can maintain the strength at the time of new construction.

Patent Document 2 has the name "reinforcing structure for the ground surface of signal poles, utility poles, etc.", and the steel cross section is insufficient due to corrosion in the ground surface and soil of signal poles, lighting poles, utility poles, etc., and resistance to external force is increased. A device relating to a lowered strut reinforcement structure is disclosed.
The invention disclosed in Patent Document 2 will be described by using the reference numerals described in the document as they are. When the support column 1 has the concrete foundation 2, the constriction holes are appropriately spaced in the concrete foundation 2 around the support column. Then, the anchor reinforcing bar 3 is inserted and fixed in the hole, and then the anchor reinforcing bar 3 is inserted into the hole of the semi-circular concrete block 4 of the factory product to form a pair of hollow cylindrical bodies centered on the support column 1. A joint steel plate 5 is inserted through the top screw of the anchor reinforcing bar 3 and fixed with a nut 6 by sandwiching the seam on the upper surface of the concrete block, and the gap between the block and the column and the block is filled with a fixing agent such as adhesive and fixed and integrated. It is a structure.
According to the device disclosed in Patent Document 2 having the above configuration, since the factory product is brought to the site and assembled manually, no large equipment is required, and the columns and the like can be reinforced safely and economically in a short period of time. It is possible. In addition, although many dangerous columns and the like are scattered nationwide, according to the device disclosed in Patent Document 2, the safety and security of residents can be ensured in a short period of time at a relatively low cost.

Patent Document 3 discloses an invention relating to a reinforcing structure of a pillar having a damaged base under the name of "reinforcing structure of a pillar".
The invention disclosed in Patent Document 3 will be described by using the reference numerals described in the document as they are, and has a reinforcing cover 2 that is fitted onto the damaged base of the existing pillar 1 to reinforce the pillar. This reinforcing cover is composed of at least a pair of cover bodies 2A and 2B, and these cover bodies are externally fitted to the base of the column body, and the cover bodies are bound to each other with screws 8, 8 ..., And over the required length of the lower end of the cover body. By embedding it in the ground and placing the foundation concrete 9 and solidifying it, the pillar body and the reinforcing cover are integrated and reinforced.
According to the invention disclosed in Patent Document 3 having the above configuration, the cover body is externally fitted to the damaged portion of the existing pillar body whose base is damaged, and the binding overlapping overlapping edge of the binding portion is bound with a screw. The lower end is inserted into the ground of the base of the column, and cement mortar is filled around it together with the aggregate to solidify it, thereby integrating the column and the cover, so that the base of the column is firmly reinforced. , It is possible to continue using it safely without replacing it with a new pillar, and it is difficult to replace the pillar in the case of a pillar that is difficult to pause for a while, such as a signal pillar on the road, or in the case of a new pillar. It can be made to function particularly effectively in the case of pillars that exist in various places.

Japanese Unexamined Patent Publication No. 2008-63933 Utility Model Registration No. 3141110 JP-A-2010-31549

In the invention disclosed in Patent Document 1, the corroded portion at the root of the existing hollow tube is excised, and a reinforcing part is applied to the excised portion. Therefore, the existing hollow tube after reinforcement is sufficient. It is thought that it exerts a high strength.
However, in the case of the invention disclosed in Patent Document 1, it is necessary to perform welding work in order to fix the reinforcing parts to the existing hollow pipe.
Then, when the existing hollow pipe to be repaired by the invention disclosed in Patent Document 1 is located in a remote area such as a mountainous area, the worker is required to perform welding equipment (welding tool) on the remote area for the repair work. , Generator, etc.), which was extremely complicated.

Even in the invention disclosed in Patent Document 2, it is considered that the existing hollow tube after reinforcement exhibits sufficient strength.
However, when the invention disclosed in Patent Document 2 is adopted and the repaired parts are located in a large number of remote areas such as mountainous areas, the worker may use a large number of factory products in the remote areas for the repair work. It was complicated to bring in a semi-circular concrete block.

In the case of the invention disclosed in Patent Document 3, even if the repaired portion extends to a large number of locations in a remote area such as a mountainous area, it is considered that the cover member can be easily carried, but the lower end of the cover member. Need to be buried in the ground. In this case, when the existing hollow pipe is buried in the concrete foundation, it is necessary to cut the concrete foundation near the root of the existing hollow pipe, and there is a problem that it is difficult to improve the work efficiency of the repair work.

The present invention has been made in response to such conventional circumstances, and an object of the present invention is that the structure is simple and easy to carry, and it can be easily and firmly attached to an existing hollow tube by using a simple hand-held tool. It is an object of the present invention to provide an existing hollow pipe repair member which can be used and an existing hollow pipe repair method using the same.

In order to solve the above problems, the existing hollow pipe repair member according to the first invention includes a cut end formed near the root of the existing hollow pipe and a concrete foundation in which the lower end of the existing hollow pipe is embedded. It is an existing hollow tube repair member interposed between the first tubular body, which is arranged while covering the outer surface near the cut end, and is integrally joined to the lower end of the first tubular body. It has a flat plate body that closes the opening of the cut mark hole of the existing hollow pipe formed on the concrete foundation, and a second cylinder that is integrally joined to the lower surface side of the flat plate body and hangs down in the cut mark hole. The flat plate body has a through hole for connecting the hollow portion of the first tubular body and the hollow portion of the second tubular body, and the first tubular body, the flat plate body, and the second tubular body are integrated. The main body is characterized by being composed of a pair of divided pieces formed by dividing the main body into two in the vertical direction.
In the first invention of the above configuration, the first tubular body is interposed between the cut end of the existing hollow pipe and the concrete foundation, and transmits the force acting on the existing hollow pipe to the concrete foundation. Has an action. That is, the first cylinder acts as a substitute for the excision site of the existing hollow tube. Further, the flat plate body has an effect of closing the opening of the cut mark hole formed by cutting off the root of the existing hollow tube and holding the first tubular body upright on the concrete foundation. Further, the second cylinder has an action of holding the first cylinder and the flat plate in an upright state by inserting the second cylinder into the fluidized cured product filled in the cut mark hole of the existing hollow tube. Has. Further, the through hole of the flat plate has an effect of leading out the fluidized cured product overflowing from the cut mark hole into the first tubular body when the second tubular body is inserted into the fluidized cured product. .. In addition, by forming the main body portion in which the first tubular body, the flat plate body, and the second tubular body are integrated with a pair of divided pieces, the length of the excised portion in the existing hollow tube can be increased. Even if the length is shorter than the length of the first cylinder, it has an effect of making it possible to dispose the first cylinder while covering the outer surface near the cut end of the existing hollow tube.
Therefore, according to the first invention, the main body portion is formed by excising the deteriorated portion or the corroded portion near the root of the existing hollow pipe by forming the main body portion into two equal parts in the extending direction. The action of making it possible to install the main body by using the cut mark holes formed in the concrete foundation by cutting the existing hollow pipe so as to fill the gap between the existing hollow pipe and the concrete foundation. Has.

In the first invention described above, the existing hollow tube repair member according to the second invention has a bolt insertion hole for inserting a fixing bolt for integrating a pair of divided pieces. It is characterized by being.
In the second invention having the above configuration, in addition to the same operation as the first invention, the first cylinder body is provided with a bolt insertion hole, so that the operator can integrate the divided pieces at the work site for fixing. It has the effect of reducing the time and effort required to form the bolt on the first cylinder.

The method for repairing an existing hollow pipe, which is the third invention, is performed from a cutting step of cutting the vicinity of the root of the existing hollow pipe and a cutting mark hole formed in the concrete foundation by cutting the existing hollow pipe. In the cleaning step of removing the contained matter accumulated inside, the first fluidized hardened material filling step of filling the cleaned cut mark hole with the fluidized hardened material, and the cutting mark hole filled with the fluidized hardened material. , The second tubular body in the divided pieces according to the first invention or the second invention is inserted, and a divided piece installation step of closing the opening of the cut mark hole with a flat plate body and a pair of divided pieces are formed. the first cylindrical body, interpolation with bored at least a pair of bolt insertion holes, and the hole forming step of forming an injection hole for injecting the flowable curable material to an existing hollow tube, the bolt into the bolt insertion hole It is characterized by having a fixing step of setting and integrating a pair of divided pieces, and a second fluidized cured product filling step of filling the hollow portion of the first cylinder from the injection hole with the fluidized cured product. Is to be.
In the third invention of the above configuration, the cutting step is the existing hollow pipe to be repaired, which is the first or second invention by cutting the portion near the root of the deteriorated or corroded concrete foundation. It has the function of forming a space for installing the hollow pipe repair member. In addition, the cleaning process removes water accumulated inside and a part of the existing hollow tube that has corroded and collapsed and accumulated from the cut mark hole formed by cutting the root of the existing hollow tube. It has an effect of making the cut mark hole usable as a hole for burying the lower end side of the existing hollow pipe repair member according to the first or second invention. Further, in the first fluidized cured product filling step, a cut mark hole that has been cleaned with the fluidized cured product for holding the divided pieces of the existing hollow tube repair member (first invention or second invention) is formed. It has the effect of filling. Then, in the split piece installation step, the split pieces constituting the existing hollow pipe repair portion according to the first or second invention are placed in the gap formed between the lower end of the cut existing hollow pipe and the concrete foundation. It has the function of installing. At this time, among the fluid cured products filled in the cut mark holes, the fluid cured products overflowing from the cut mark holes when the divided pieces are inserted into the cut mark holes are formed in the flat plate body constituting the divided pieces. It is led out from the second cylinder body to the first cylinder body through the through hole. Then, when the fluidized hardened material filled in the cut mark hole is cured, the divided pieces inserted in the cut mark hole, the fluidized hardened material, and the concrete foundation are integrated. In addition, the hole forming step is for integrating the divided pieces interposed between the lower end of the cut existing hollow pipe and the concrete foundation, and / or the divided pieces and the existing hollow pipe. It has the function of forming a hole through which a bolt is inserted for integration and an injection hole for injecting a fluidized cured product into an existing hollow tube. Further, the fixing step has an action of inserting a bolt into the bolt insertion hole to integrate the pair of divided pieces. Further, along with this, the existing hollow pipe repair member according to the first or second invention and the existing hollow pipe are integrated. In this way, the existing hollow pipe, the existing hollow pipe repair member, and the concrete foundation are integrated by performing the first fluidized cured product filling step, the split piece installation step, the hole forming step, and the fixing step. Will be done. Further, in the second fluidized cured product filling step, the fluidized cured product is injected through the injection holes formed in the existing hollow tube to fill the inside of the first hollow tube and the existing hollow tube with the fluidized cured product. It has the effect of. As a result, the fluid cured product that is supplied in the first fluidized cured product filling step and flows from the second tubular body to the first tubular body through the through hole formed in the flat plate body, and the subsequent second tubular body. The fluidized cured product injected into the first cylinder is integrated with the fluid cured product filling step. As a result, according to the third invention, the concrete foundation, the existing hollow pipe repair member according to the first or second invention, and the existing hollow pipe are integrated via the fluidized cured product. It has the effect of exerting sufficient strength and durability at the base of the existing hollow tube after repair.

The existing hollow tube repair method according to the fourth invention is the existing hollow tube repair method according to claim 3, wherein the existing hollow tube and the existing hollow tube are used before or after the second fluidized cured product filling step. It is characterized by having a gap filling step of arranging a gap filling material in a gap with the upper end of the first cylinder.
In the fourth invention having the above configuration, in addition to the same action as the third invention, the gap filling step has an action of filling the gap generated between the existing hollow tube and the upper end of the first cylinder. This has the effect of preventing rainwater from entering the inside of the existing hollow tube or the first cylinder from the joint between the existing hollow pipe and the first cylinder.

According to the first invention as described above, it is possible to provide an existing hollow tube repair member that is lightweight and easy to carry. Further, according to the first invention, it is possible to provide an existing hollow tube repair member capable of performing an attachment work in a gap formed by cutting an existing hollow tube only by using a simple hand-held tool. .. As a result, work efficiency can be significantly improved when repairing the existing hollow pipe.
Further, according to the first invention, by setting the outer diameter of the second cylinder to be smaller than the inner diameter of the existing hollow pipe, the concrete foundation is formed when the root portion of the existing hollow pipe is cut off. The cut mark hole formed in the above can be used as an embedding hole for embedding the second cylinder according to the first invention in the concrete foundation. In this case, in fixing the first invention to the concrete foundation, it is not necessary to cut a part of the concrete foundation at the repair site. Further, according to the first invention, in order to fix the existing hollow pipe repair member in the gap formed by cutting the existing hollow pipe, it is necessary to weld the existing hollow pipe and the existing hollow pipe repair member. Absent. This means that, for example, when repairing an existing hollow pipe in a remote area such as a mountainous area, the worker does not need to bring large-scale equipment and tools to the site. Therefore, according to the first invention, it is possible to significantly reduce the burden on the operator during the repair work of the existing hollow pipe.
Further, the existing hollow tube repair member according to the first invention is obtained by joining a first cylinder body and a second cylinder body to the front surface and the back surface of a flat plate body having through holes by welding. It can be easily mass-produced at the factory by simply dividing it in the direction of the central axis. Therefore, there is an advantage that the manufacturing cost of the first invention can be reduced.
Further, when the first invention is used, the corroded portion of the existing hollow tube can be excised and replaced with the first invention, and the existing hollow tube can be used as it is for other parts. Therefore, according to the first invention, the cost required to restore the function and strength of the existing hollow tube to be repaired can be significantly reduced.

According to the second invention, in addition to the same effect as that of the first invention, the first cylinder body is provided with a bolt insertion hole in advance, so that when the existing hollow pipe is repaired, the first cylinder is used at the work site. It is possible to omit the work of forming the bolt insertion hole for the cylinder body of the above. As a result, the amount of work performed by the worker on site can be reduced, and the burden on the worker when repairing the existing hollow pipe can be significantly reduced.

The third invention uses the existing hollow pipe repair member according to the first or second invention described above to repair a deteriorated or corroded portion of an existing hollow pipe whose lower end is embedded in a concrete foundation. The work process at the time of carrying out is specified as an invention of the method.
Therefore, the effect of the third invention is the same as the effect of the first or second invention described above.
Further, in the third invention, the member necessary for fixing the existing hollow pipe repair member according to the first or second invention to the concrete foundation or the existing hollow pipe is, for example, fluid hardening such as mortar. Objects and bolts (and nuts, washers). In addition, the amount of fluidized hardened material used in the field is sufficient if it fills a part of the hollow part of the existing hollow pipe, so even if the repair work place is a remote area in a mountainous area, these It is easy to bring in the members.
Therefore, according to the third invention, materials and equipment for repairing deteriorated or corroded parts of the existing hollow pipe using the existing hollow pipe repair member according to the first or second invention described above. It is possible to significantly reduce the burden on the worker for carrying in.
Further, according to the third invention, the existing hollow tube repair member and the existing hollow tube, which are the first or second inventions, can be integrated via the fluidized cured product, so that the repair can be performed. Sufficient strength and durability can be exhibited at the base of the existing hollow tube later.
Further, since the insides of the first and second cylinders are both filled with the fluidized cured product, there is no possibility that rainwater will stay in this portion. As a result, the risk of deterioration or corrosion of the existing hollow pipe repair member connected to the cut end of the existing hollow pipe can be significantly reduced.
Therefore, according to the third invention, the workability is good, the number of materials (parts) and equipment required for the work is small, and the existing hollow pipe repair member deteriorates with the passage of time after the work. It is possible to provide a difficult method for repairing an existing hollow pipe.

According to the fourth invention, in addition to the same effect as that of the third invention described above, by having the gap filling step, the cut end of the existing hollow pipe and its vicinity by rainwater and the first cylinder The risk of corrosion occurring at the upper end and its vicinity can be significantly reduced.
Therefore, according to the fourth invention, the durability of the portion repaired by the fourth invention can be further improved.

(A) is a side view of the existing hollow pipe repair member according to the embodiment of the present invention, and (b) is a cross-sectional view of the existing hollow pipe repair member according to the embodiment of the present invention. It is a perspective view of the existing hollow pipe repair member which concerns on embodiment of this invention. It is a flowchart which shows each procedure of the existing hollow pipe repair method which concerns on this Embodiment. (A) is a cross-sectional view of an existing hollow pipe to be repaired, and (b) is a cross-sectional view showing a state after excising a corroded portion of the existing hollow pipe. (C) It is sectional drawing which shows the state of the fluid | cured material filling process which concerns on embodiment of this invention, and (d) is the sectional view which shows the state of the division piece installation process which concerns on embodiment of this invention. (E) is a cross-sectional view showing a state of the hole forming step according to the embodiment of the present invention, and (f) is a cross-sectional view showing a state at the time of completion of the hole forming step according to the embodiment of the present invention. (G) It is sectional drawing which shows the state of the fixing process which concerns on embodiment of this invention, and (h) is the sectional view which shows the state of the 2nd fluid curable material filling process which concerns on embodiment of this invention. .. (I) It is sectional drawing which shows the state at the time of completion of the 2nd fluid curable material filling process which concerns on embodiment of this invention, and (j) shows the state of the gap filling process which concerns on embodiment of this invention. It is a sectional view.

The existing hollow pipe repair member according to the embodiment of the present invention and the existing hollow pipe repair method using the same will be described in detail with reference to FIGS. 1 to 8.

In general, a structure in which one end of a hollow pipe is embedded in a concrete foundation is used in various places, for example, as a support for a handrail. In a structure using such a hollow pipe, corrosion occurs at the root of the hollow pipe arranged near the upper surface of the concrete foundation due to deterioration due to aging, and it is not possible to exhibit sufficient strength as it is. Although it cannot be done, there are many cases where the parts other than the root can be fully used.
In such a case, a processed repair member which is replaced with a defective portion formed by excising the corroded portion of the existing hollow pipe to supplement the strength of the root of the existing hollow pipe is related to the present embodiment. It is an existing hollow pipe repair member.

First, the attachment portion of the existing hollow pipe repair member according to the present embodiment will be described with reference to FIG.
FIG. 4A is a cross-sectional view of the existing hollow tube to be repaired, and FIG. 4B is a cross-sectional view showing a state after the corroded portion of the existing hollow tube is cut off.
As shown in FIG. 4A, in the existing hollow pipe 8 to be repaired, a corroded portion 8b is generated at the root portion buried in the concrete foundation 20 with aging, and is buried in the concrete foundation 20. rainwater 10 is accumulated at the lower end of the existing hollow tube 8, or have such corrosion piece 8c existing hollow tube 8 peeled corroded is deposited.
For the existing hollow pipe 8 to be repaired as shown in FIG. 4A, it is necessary to perform preparatory work for attaching the existing hollow pipe repair member according to the present embodiment.
More specifically, as shown in FIG. 4B, the corroded portion 8b on the concrete foundation 20 of the existing hollow pipe 8 is excised (step S01 described in the latter stage), and further, cleaning work (described in the latter stage). It is necessary to perform step S02) to remove the rainwater 10 and the corroded piece 8c from the cutting mark hole 9 generated by cutting the corroded portion 8b.
Then, as shown in FIG. 4B, the book is retrofitted between the cut end 8a of the existing hollow pipe 8 after the cleaning work and the concrete foundation 20 (opening 9a of the cut mark hole 9). It is an existing hollow pipe repair member according to an embodiment.

Next, the form of the existing hollow pipe repair member according to the present embodiment will be described with reference to FIGS. 1 and 2.
FIG. 1A is a side view of the existing hollow tube repair member according to the embodiment of the present invention, and FIG. 1B is a cross-sectional view of the existing hollow tube repair member according to the embodiment of the present invention. Further, FIG. 2 is a perspective view of an existing hollow pipe repair member according to an embodiment of the present invention. The same parts as those shown in FIG. 4 are designated by the same reference numerals, and the description of their configurations will be omitted.
The existing hollow pipe repair member 1 according to the present embodiment is interposed between the cut end 8a formed near the root of the existing hollow pipe 8 shown in FIG. 4B described above and the concrete foundation 20. As shown in FIGS. 1 and 2, a first tubular body 4 arranged while covering the outer surface near the cut end 8a of the existing hollow tube 8 and the first tubular body 4 and the first tubular body 4 are arranged. A flat plate body 5 that is integrally joined to the lower end of the body 4 and closes the opening 9a [see FIG. 4 (b) above] of the cut mark hole 9 of the existing hollow tube 8 formed in the concrete foundation 20 and the flat plate body 5. It is integrally joined to the lower surface 5b side of the flat plate body 5 and is composed of a second tubular body 6 that hangs down in the cutting mark hole 9.
Further, in the existing hollow pipe repair member 1 according to the present embodiment, the flat plate body 5 is provided with a through hole 7 in the central portion thereof, and is integrally joined to the upper surface 5a side of the flat plate body 5. The hollow portion of the tubular body 4 and the hollow portion of the second tubular body 6 integrally joined to the lower surface 5b side of the flat plate body 5 are connected via a through hole 7.
Further, in the existing hollow tube repair member 1 according to the present embodiment, the main body portion 2 in which the first tubular body 4, the flat plate body 5, and the second tubular body 6 are integrated forms the main body portion 2. It is composed of a pair of divided pieces 3 and 3 which are divided into two in the vertical direction. The divided pieces 3 and 3 can be integrated by superimposing the divided surfaces 3a and 3a.

In the existing hollow tube repair member 1 according to the present embodiment, the first tubular body 4, the flat plate body 5, and the second tubular body 6 are all made of metal, and the first tubular body 4 and the flat plate are used. The body 5, the flat plate body 5, and the second tubular body 6 are all integrally joined by welding.
Further, as shown in FIGS. 4A and 4B, the existing hollow tube repair member 1 according to the present embodiment is retrofitted to the existing hollow tube 8. Therefore, as shown in FIG. 1 (b), the inner diameter of the first cylinder 4 of the existing hollow tube repair member 1 according to the present embodiment matches the outer diameter of the existing hollow tube 8 (existing middle). It is possible to ensure that the second cylinder 6 is inserted into the cut hole 9 so that a clearance is formed between the empty tube 8 and the first cylinder 4). It is necessary to set the outer diameter of the second tubular body 6 to be smaller than the inner diameter of the cutting mark hole 9 so as to be possible.
The existing hollow tube repair member 1 according to the present embodiment can be manufactured in advance at a factory by measuring the inner and outer diameters of the existing hollow tube 8 to be repaired.

Here, the existing hollow pipe repair method using the existing hollow pipe repair member 1 according to the present embodiment will be described in detail with reference to FIGS. 3 to 8.
FIG. 3 is a flowchart showing each procedure of the existing hollow pipe repair method according to the present embodiment. The same parts as those shown in FIGS. 1, 2 and 4 are designated by the same reference numerals, and the description of their configurations will be omitted.
As shown in FIG. 3, in the existing hollow pipe repair method 19 according to the present embodiment, the existing hollow pipe 8 is attached to the existing hollow pipe 8 prior to the attachment of the existing hollow pipe repair member 1 according to the present embodiment. It is necessary to secure a space for attaching the pipe repair member 1.
Therefore, the cutting step (step S01) of the existing hollow tube 8 described above with reference to FIGS. 4 (a) and 4 (b), the rainwater accumulated in the cutting mark hole 9, and the corroded piece 8c are discharged. A cleaning step (step S02) for removing the above is performed.

After this step S02, the first flowable cured product filling step shown in FIG. 3 and the split piece installation step in the cutting mark hole 9 are performed.
FIG. 5C is a cross-sectional view showing a state of a fluidized cured product filling step according to an embodiment of the present invention, and FIG. 5D is a cross-sectional view showing a state of a split piece installation step according to the embodiment of the present invention. It is a figure. The same parts as those shown in FIGS. 1 to 4 are designated by the same reference numerals, and the description of their configurations will be omitted.
In the fluid curing material filling step (step S03) shown in FIGS. 3 and 5 (c), the fluid curing agent 11 (for example, mortar, synthetic resin) is placed in the cut hole 9 for which cleaning has been completed in the previous step S02. It is a process of pouring and filling (hardener, etc.).
Further, in the split piece installation step (step S04) shown in FIGS. 3 and 5 (d), the fluid hardener 11 filled in the cut mark hole 9 in the previous step S03 is subjected to the above-described embodiment. This is a step of inserting the second tubular body 6 of the pair of divided pieces 3 and 3 and fixing the pair of divided pieces 3 and 3 to the concrete foundation 20.
At this time, by superimposing the divided surfaces 3a and 3a (see FIG. 2) of the pair of divided pieces 3 and 3, as shown in FIG. 5 (b), the outer surface of the cut end 8a of the existing hollow tube 8 The second cylinder 6 of the divided pieces 3 and 3 can be arranged so as to cover the top. As a result, when the pair of divided pieces 3 and 3 are integrally fixed by the fixture in a later step, the cut end 8a of the existing hollow tube 8 is inserted into the first tubular body 4. be able to.

In the existing hollow pipe repair method 19 according to the present embodiment, in the split piece installation step of this step S04, the existing hollow pipe 8a and the concrete foundation 20 according to the present embodiment are located between the cut end 8a of the existing hollow pipe 8 and the concrete foundation 20. When the hollow tube repair member 1 (divided pieces 3, 3) is arranged, the vicinity of the cut end 8a of the existing hollow tube 8 and the first tubular body 4 of the existing hollow tube repair member 1 overlap each other. Must be formed.
This will be described in detail later, but the overlapping portion between the cut end 8a of the existing hollow tube 8 and the first cylinder 4 of the existing hollow tube repair member 1 is fixed by a fixing tool such as a bolt. This is to integrate the existing hollow tube 8 and the existing hollow tube repair member 1.
Therefore, in the existing hollow tube repair member 1 according to the present embodiment, the distance from the lower surface 5b of the flat plate body 5 to the upper end of the first tubular body 4 is set from the cut end 8a of the existing hollow tube 8 to the cut mark hole. It is necessary to set it larger than the distance to the opening 9a of 9.

Further, by filling the cutting mark hole 9 with the fluidizing curing agent 11 in step S03, rainwater or the like collects in the cutting mark hole 9 after the existing hollow pipe repair method 19 according to the present embodiment is completed. Can be prevented.
In addition, as the fluidic curing agent 11 filled in the cutting mark hole 9 is cured, the divided pieces 3 and 3 according to the present embodiment to be inserted into the fluidizing curing agent 11 in the subsequent step S04 are separated. , Can be integrally fixed with the cutting mark hole 9 and the fluid curing agent 11.

Further, when the fluid curing agent 11 filled in the cutting mark hole 9 is inserted into the divided pieces 3 and 3, the opening 9a of the cutting mark hole 9 is integrally fixed to the second tubular body 6. It is sealed by a collar-shaped flat plate body 5. At this time, as shown in FIG. 5 (d), a part of the fluid curing agent 11 which was extruded by being pushed into the fluid curing agent 11 and lost its place was in the existing medium. It flows into the hollow portion of the first tubular body 4 through the through hole 7 formed in the flat plate body 5 of the air pipe repair member 1.
Then, when the fluidity curing agent 11 is cured in this state, the existing hollow pipe repair member 1 (divided pieces 3, 3) according to the present embodiment is transferred to the concrete foundation 20 via the fluidity curing agent 11. Can be fixed integrally.

As described above, the second tubular body 6 of the existing hollow tube repair member 1 according to the present embodiment is used by being embedded in the fluidizing curing agent 11. Therefore, it is desirable that the second cylinder 6 is not easily removed from the fluid curing agent 11 after the fluid curing agent 11 is cured. Therefore, it is desirable that the surface (outer surface and / or inner surface) of the second cylinder 6 of the existing hollow tube repair member 1 according to the present embodiment is not smooth.
More specifically, the surface of the second cylinder 6 of the existing hollow tube repair member 1 according to the present embodiment may be made uneven to make the surface rough, or the second cylinder may be roughened. Protrusions may be formed on the surface of 6. Alternatively, one or a plurality of through holes may be formed in the second cylinder 6 so as not to impair the strength of the second cylinder 6.
In either case, when the fluidity curing agent 11 is cured in the cutting mark hole 9, it is possible to make it difficult for the pair of divided pieces 3 and 3 to come off from the fluidity curing agent 11, and thus according to the present embodiment. It is possible to increase the strength and durability of the repaired portion using the existing hollow pipe repair member 1.

Next, the hole forming step will be described in detail with reference to FIGS. 3 and 6.
FIG. 6 (e) is a cross-sectional view showing a state of the hole forming step according to the embodiment of the present invention, and FIG. 6 (f) is a cross-sectional view showing a state at the time of completion of the hole forming step according to the embodiment of the present invention. Is. The same parts as those shown in FIGS. 1 to 5 are designated by the same reference numerals, and the description of their configurations will be omitted.
After the completion of the split piece installation step (step S04) shown in FIGS. 3 and 5 (d) above and after the fluidity curing agent 11 is sufficiently cured, the pair of split pieces 3 and 3 according to the present embodiment. A step of forming a bolt insertion hole for the purpose of integrally fixing each other and for the purpose of integrally fixing the pair of divided pieces 3 and 3 and the existing hollow tube 8 according to the present embodiment. This is a hole forming step (step S05).
In step S05, as shown in FIGS. 6 (e) and 6 (f), the first of the pair of divided pieces 3 and 3 according to the present embodiment fixed in the cutting mark hole 9 by the fluid curing agent 11. This is a step of forming bolt insertion holes 13 (through holes) at at least two desired locations of the tubular body 4 using a tool such as a drill 12.
In this step S05, an injection hole 14 for separately injecting a fluid curing agent (described in detail in a later stage) into the hollow portion of the first tubular body 4 is provided in the vicinity of the cut end 8a of the existing hollow tube 8. It may be formed together with.
Further, in FIG. 6E, the tip of the drill 12 is the planned formation position of the bolt insertion hole 13 and the injection hole 14.

In step S05, of the two bolt insertion holes 13 [see FIG. 6 (f)] formed in the first cylinder 4 of the pair of divided pieces 3 and 3, the flat plate body 5 is arranged on the side. The bolt insertion hole 13 to be formed is for integrally fixing the pair of divided pieces 3 and 3, and is formed at the overlapping portion between the cut end 8a of the existing hollow tube 8 and the first tubular body 4. The bolt insertion hole 13 to be formed is for integrating the existing hollow tube 8 and the pair of divided pieces 3 and 3 (existing hollow tube repair member 1).
In FIGS. 6 (e) and 6 (f), the bolt insertion hole 13 for integrating the pair of divided pieces 3 and 3 and the existing hollow tube 8 and the existing hollow tube repair member 1 are integrated. Although the case where the bolt insertion holes 13 for the purpose are formed at one place each is described as an example, each bolt insertion hole 13 may be formed at one or more places.
In this case, the pair of split pieces 3 and 3 can be more firmly integrated, or the existing hollow tube 8 and the pair of 3, 3 (existing hollow tube repair member 1) are more firmly integrated. It is possible to exert the effect.

Next, the fixing step will be described in detail with reference to FIGS. 3 and 7 (g).
FIG. 7 (g) is a cross-sectional view showing a state of the fixing step according to the embodiment of the present invention. The same parts as those shown in FIGS. 1 to 6 are designated by the same reference numerals, and the description of their configurations will be omitted.
In the fixing step (step S06) shown in FIGS. 3 and 7 (g), for example, a fixing tool such as a bolt 15 is inserted into each of the bolt insertion holes 13 and 13 formed in the previous step S05 (hole forming step). Then, the pair of divided pieces 3 and 3 (existing hollow tube repair member 1) are integrated and fixed, and the pair of divided pieces 3 and 3 (existing hollow tube repair member 1) and the existing hollow tube 8 are fixed. This is a step of integrally fixing the cut end 8a.
In this step S06, as shown in FIG. 7 (g), the pair of split pieces 3, 3 and the pair of split pieces 3, 3 and the existing hollow tube 8 are integrated by using the bolt 15 and the nut 16. It is fixed.
In step S06, a washer 17 may be used as a fixture in addition to the bolt 15 and the nut 16. By using the washer 17 in this way, the fixing effect of the bolt 15 and the nut 16 can be further strengthened. Further, the pair of split pieces 3, 3 and the fixture between the pair of split pieces 3, 3 and the existing hollow tube 8 need not be specified as the bolt 15 (and the nut 16, washer 17), and are the same. Anything having a function can be used without any problem.

Next, the second fluidized cured product filling step will be described in detail with reference to FIGS. 3, 7 (h) and 8 (i).
FIG. 7 (h) is a cross-sectional view showing a state of the second fluidized cured product filling step according to the embodiment of the present invention. Further, FIG. 8 (i) is a cross-sectional view showing a state at the time of completion of the second fluidized cured product filling step according to the embodiment of the present invention. The same parts as those shown in FIGS. 1 to 7 (g) are designated by the same reference numerals, and the description of the configuration thereof will be omitted.
After completing the previous step S06, from the injection hole 14 formed in the vicinity of the cut end 8a of the existing hollow tube 8 in the previous step S03, the first tubular body 4 of the existing hollow tube repair member 1 The step of separately injecting the fluidity curing agent 11 into the hollow portion and filling the inside of the hollow portion of the first cylinder 4 with the fluidity curing agent 11 [see FIG. 7 (h)] is the filling of the second fluidized cured product. This is a step (step 07). FIG. 8 (i) shows a state in which this step 07 is completed.
As shown in FIGS. 7 (h) and 8 (i), in step 07, the injection nozzle 18 is inserted into the injection hole 14 formed in the first cylinder 4 of the existing hollow tube repair member 1, and this injection is performed. By filling the inside of the first cylinder 4 from the nozzle 18 with the fluidity curing agent 11 and curing the nozzle 18, the first cylinder 4 and the bolt 15 are integrated by the newly injected fluidity curing agent 11. Can be fixed.
In this case, since the connected state of the existing hollow pipe 8 and the existing hollow pipe repair member 1 can be strengthened, the strength and durability of the repaired portion by the existing hollow pipe repair method 19 according to the present embodiment can be improved. It can be further enhanced.

In addition, in FIG. 8 (i), the case where the injection hole 14 formed in the vicinity of the cut end 8a of the existing hollow tube 8 is closed by the newly injected fluid hardener 11 is described as an example. However, there is no particular need to close the injection hole 14 with the newly injected fluid hardener 11.
In this case, when rainwater intrudes into the hollow portion of the existing hollow tube 8 from above the existing hollow tube 8 for some reason, the rainwater can be discharged from the injection hole 14 to the outside of the existing hollow tube 8. .. In this case, since rainwater does not stay in the hollow portion of the existing hollow tube 8, it is possible to prevent the existing hollow tube 8 from corroding from the inside.
Therefore, by leaving the injection hole 14 in the open state, the service life of the repaired portion by the existing hollow pipe repair method 19 according to the present embodiment can be extended.

Finally, the gap filling step will be described in detail with reference to FIG. 8 (j).
FIG. 8 (j) is a cross-sectional view showing a state of the gap filling step according to the embodiment of the present invention. The same parts as those shown in FIGS. 1 to 8 (i) are designated by the same reference numerals, and the description of the configuration thereof will be omitted.
The existing hollow pipe repair method 19 according to the present embodiment may be completed when the above-mentioned second fluidized cured product filling step (step 07) is completed, but includes step S08 shown below. You may be.
After the completion of the previous step S07, the gap between the upper end of the first cylinder 4 of the existing hollow tube repair member 1 according to the present embodiment and the existing hollow tube 8 is, for example, a synthetic resin or the like (for example, caulking). The step of filling with the fluidity curing agent 21 [see FIG. 8 (j)] including the agent and the like is the gap filling step (step S08).
By performing this gap filling step (step S08), it is possible to suitably prevent rainwater from entering the gap between the existing hollow tube 8 and the first tubular body 4. As a result, it is preferable that rainwater infiltrates into the gap between the existing hollow tube 8 and the first tubular body 4, new corrosion occurs in this portion, and the strength and durability of the first tubular body 4 decrease. Can be prevented.
Although not particularly shown, the fluid curing agent 21 may also be filled in the head of the bolt 15 which is a fixture and the gap around the nut 16. In this case, it is possible to preferably suppress the occurrence of corrosion at the place where the fixture is installed, and preferably prevent the strength and durability of the repaired place from being lowered.

According to the existing hollow pipe repair member 1 according to the present embodiment and the existing hollow pipe repair method 19 using the same as described above, the existing hollow pipe 8 is located near the root embedded in the concrete foundation 20. When only corrosion occurs, the repair work can be completed by effectively utilizing the upper part of the existing hollow tube 8.
In this case, the corroded portion of the existing hollow tube 8 is excised and replaced with the existing hollow tube repair member 1 according to the present embodiment, so that the strength and durability of the repaired portion are compared with those of other portions. Is not inferior.
Therefore, according to the existing hollow tube repair member 1 and the existing hollow tube repair method 19 according to the present embodiment, the repair work can be completed by using the usable portion of the existing hollow tube 8 as it is. The labor and cost required for repairing the air traffic control 8 can be significantly reduced.

Further, the existing hollow tube repair member 1 (pair of divided pieces 3 and 3) used in the existing hollow tube repair method 19 according to the present embodiment can be manufactured in advance at the factory, and thus is already existing. At the repair site of the hollow tube 8, welding work for integrating the first tubular body 4 and the flat plate body 5, or integrating the flat plate body 5 and the second tubular body 6, or the first tubular body 4 It is not necessary to perform the fusing work on the site by dividing the main body 2 composed of the flat plate body 5 and the second tubular body 6 into a pair of divided pieces 3 and 3.
This means that it is not necessary to bring equipment for welding and / or fusing to the repair site of the existing hollow pipe 8.
Therefore, according to the existing hollow pipe repair member 1 and the existing hollow pipe repair method 19 using the existing hollow pipe repair member 1 according to the present embodiment, even when the existing hollow pipe 8 is repaired in a remote area such as a mountainous area. Even if there is no on-site equipment for welding and / or fusing, the repair work can be completed simply by using a simple hand tool such as a drill.
Therefore, it is possible to significantly reduce the burden on the operator when repairing the existing hollow pipe 8.

In the existing hollow pipe repair method 19 according to the present embodiment, the bolt insertion hole 13 (first tubular body 4) for integrating the pair of divided pieces 3 and 3 (existing hollow pipe repair member 1) is integrated. In the above description, a case where the bolt insertion hole 13) formed on the side where the flat plate body 5 is arranged is formed at the repair site is described as an example, but the pair of divided pieces 3 and 3 (repair of the existing hollow pipe) The bolt insertion hole 13 for integrating the member 1) may be formed in advance at the time of manufacturing the existing hollow pipe repair member 1.
In this case, since the work performed by the worker at the repair site of the existing hollow pipe 8 can be reduced, the work efficiency at the site can be improved.

As described above, the present invention can repair the root of an existing hollow pipe without performing welding and / or fusing work at the work site while effectively utilizing the usable portion of the existing hollow pipe. It is a hollow pipe repair member and an existing hollow pipe repair method using the same, and can be used in technical fields related to construction, power transmission equipment, and the like.

1 ... Existing hollow tube repair member 2 ... Main body 3 ... Divided piece 3a ... Divided surface 4 ... First cylinder 5 ... Flat plate 5a ... Top surface 5b ... Bottom surface 6 ... Second cylinder 7 ... Through hole 8 ... existing hollow tube 8a ... cutting edge 8b ... corroded portions 8c ... corrosion piece 9 ... cutting Atoana 9a ... opening 10 ... rainwater 11 ... fluidity hardener 12 ... drill 13 ... bolt insertion hole 14 ... injection holes 15 ... bolt 16 ... Nut 17 ... Washer 18 ... Injection nozzle 19 ... Existing hollow pipe repair method 20 ... Concrete foundation 21 ... Fluid hardener

Claims (2)

This is an existing hollow pipe repair method using an existing hollow pipe repair member.
The existing hollow tube repair member is
A first cylinder arranged while covering the outer surface near the cut end formed near the root of the existing hollow tube, and
A flat plate that is integrally joined to the lower end of the first cylinder and closes the opening of the cut mark hole of the existing hollow pipe formed on the concrete foundation in which the lower end of the existing hollow pipe is embedded.
It has a second tubular body that is integrally joined to the lower surface side of the flat plate body and hangs down in the cutting mark hole.
The flat plate body includes a through hole for connecting the hollow portion of the first cylinder body and the hollow portion of the second cylinder body.
The main body portion in which the first tubular body, the flat plate body, and the second tubular body are integrated is composed of a pair of divided pieces formed by dividing the main body portion into two in the vertical direction.
And ablation step of excising the root neighborhood of the existing hollow tube,
A cleaning step of removing the interior accumulated housing of the cutting mark hole or Raso,
The first fluidized cured product filling step of filling the cleaned cut mark hole with the fluidized cured product, and
Is inserted in front Stories second cylindrical body to the flowable cured product filled the cutting mark hole, a divided piece installation process by the flat plate closing the opening of the cutting mark hole,
Said first tubular body constituting the pair of divided pieces, with bored at least a pair of bolt insertion holes, the hole formation for forming an injection hole for injecting the flowable curable material into an existing hollow tube Process and
A fixing step of inserting a bolt into the bolt insertion hole to integrate the pair of divided pieces.
Existing hollow tube repairing method characterized by having a second flowable cured product filling step of filling a flowable cured within said hollow portion of said first cylindrical body from the injection hole. A claim comprising a gap filling step of arranging a gap filling material in a gap between the existing hollow tube and the upper end of the first cylinder before or after the second fluidized cured product filling step. Item 1. The method for repairing an existing hollow pipe according to Item 1 .

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