JP4305803B2 - Structure for backfilling the end of the lining material for pipes - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a method of laying a lining material on the inner surface to repair an existing pipeline such as a sewage pipe, and injecting a backfill material into the gap between the lining material and the inner surface of the existing pipeline and curing it. The present invention relates to a back-filling structure used at the end of a lining material.
[0002]
[Prior art]
As a repair method for existing pipelines such as sewage pipes, a lining material has been laid along the inner surface of the existing pipeline, and mortar, cement milk, etc. are backed up in the gap between the lining material and the inner surface of the existing pipeline. A method of injecting and curing a material is known.
[0003]
In this type of construction method, an injection hose is inserted into a cylindrical gap formed between the inner surface of an existing pipe line and the lining material, as disclosed in, for example, Japanese Patent Laid-Open No. 63-88388. In addition, generally, a method is used in which the opening of both ends of the cylindrical gap in the cylinder length direction is filled with mortar, and in that state, a backfill material is injected into the cylindrical gap through an injection hose. ing.
[0004]
[Problems to be solved by the invention]
By the way, in the conventional method of injecting the backfilling material in the state where the opening portions at both ends of the gap between the existing pipe inner surface and the lining material are covered with mortar, until the mortar for hardening is cured The backfilling material must be injected at a low pressure because the backfilling material cannot be injected, and the mortar can collapse due to the pressure when the backfilling material is injected into the gap. There wasn't. Further, when water flows on the inner surface of the existing pipe line, it is difficult to completely cover the surface with mortar, and the backfill material may flow out from a part of the cover. For this reason, in the conventional method in which both ends of the voids are lined with mortar, there is a problem that the efficiency of the backfilling material injection work is low and a long time is required.
[0005]
The present invention has been made in view of such circumstances, and reliably seals the end of the gap to which the backfill material should be injected without being affected by the inner surface state of the existing pipeline such as the presence or absence of running water. The end of the lining material for the pipe line can be stably injected at high pressure and the quality of the back-filling material after curing can be stably increased. The purpose is to provide a structure for back-filling of parts.
[0006]
[Means for Solving the Problems]
In order to achieve the above-described object, the backfilling structure for the end portion of the lining material for pipes according to the present invention is backfilled in the gap formed between the inner surface of the existing pipe line and the lining material laid on the inside thereof. An end structure of a lining material for injecting a material, and a water-permeable material on an inner surface of a tubular length direction end portion of the lining material and an inner surface of an existing pipe line that is separated from the position by a predetermined distance outward in the tube length direction Both ends of the cylindrical member made of the above are crimped and fixed by corresponding hollow-shaped expanded members, and the backfilling material inlet is provided in the vicinity of the end of the lining material or in the cylindrical member. Characterized (Claim 1).
[0007]
Here, in the present invention, between the both ends of the cylindrical member and the existing pipe inner surface or the inner surface of the lining material, or between the both ends of the cylindrical member and each hollow expanded member, It is preferable to adopt a structure in which a hollow elastic member is inserted (Claim 2).
[0008]
Further, in the present invention, the backfilling structure according to claim 1 or 2 is provided on one end side of the lining material, and on the other end side, on the inner surface of the other end portion and on the outer side in the cylinder length direction from the position. Preferably, a structure (Claim 3) in which both ends of a cylindrical member made of a water-permeable material are crimped and fixed to the inner surface of an existing pipe line separated by a predetermined distance by a corresponding hollow-shaped diameter-expanding member. it can.
[0009]
Further, in the invention according to claim 3, between the both end portions of the tubular member provided on the other end side of the lining material and the inner surface of the existing pipe line or the lining material, or both end portions of the tubular member. It is preferable to adopt a structure (Claim 4) in which a hollow elastic member is inserted between the hollow expanding member.
[0010]
The present invention does not cover both ends of the cylindrical gap formed between the existing pipe line and the lining material with a curable material such as mortar, but instead of both ends of the cylindrical member made of a water-permeable material. By sealing by crimping and fixing to the inner surface of the existing pipe line and the inner surface of the lining material end with the hollow diameter-expanding member, the intended purpose is achieved.
[0011]
That is, in the present invention, the inner surface of the end portion of the lining material in the tube length direction and the inner surface of the existing pipe line that is a little distance from the position to the outer side in the tube length direction are permeable to water such as canvas made of fabric such as woven fabric. The both ends of the cylindrical member made of a conductive material are respectively crimped and fixed using a hollow diameter-expanding member, and the ends of the cylindrical gap formed between the existing pipeline and the existing pipeline are sealed, The backfilling material is injected into the cylindrical gap through the inner surface of the lining material in the vicinity of the sealing portion or through the injection port provided in the cylindrical member.
[0012]
Therefore, there is no need to wait for curing as in the case of lining with a curable material such as mortar, and the injection of the backfilling material can be started immediately after sealing with the cylindrical member, and the presence or absence of running water Thus, it is possible to stably perform sealing without being affected by the state of the inner surface of the existing pipeline.
[0013]
Moreover, even if the injection pressure of the back-filling material is increased by reliably pressing the both ends of the tubular member against the inner surface of the existing pipe line of the cylindrical member and the inner surface of the end of the lining material by the hollow diameter-expanding member, The backfill material does not leak, and the injection pressure can be increased, and the required time can be shortened.
[0014]
Furthermore, since a cylindrical member made of a water-permeable material is used as a sealing member, excess water and intruding water from the outside are discharged through the sealing portion when the backfill material is injected, and The formation of air pockets can be prevented, and the quality of the backfilling material after placement can be improved.
[0015]
As in the invention according to claim 2, the both ends of the cylindrical member are not simply crimped to the inner surface of the existing pipe line and the inner surface of the end of the lining material by the hollow expanded member, but the outer periphery or the inner end of both ends of the cylindrical member. By interposing a hollow elastic member around the circumference, even if there are irregularities on the inner surface of the existing pipe line and the inner surface of the end of the lining material, it deforms corresponding to these inner surfaces, and the sealing property at the crimping fixing part of the cylindrical member Therefore, it is possible to increase the injection pressure of the backfill material at the same time as improving workability.
[0016]
Further, as in the invention according to claim 3, the back-filling structure of the invention according to claim 1 or 2 described above is provided on one end side of the lining material, and the structure equivalent to these structures is also provided on the other end side. In other words, both ends of the cylindrical member made of a water-permeable material are fixed by crimping to the inner surface of the inner end of the lining material and the existing inner surface of the pipe line that is a predetermined distance away from that position in the cylinder length direction by the hollow diameter-expanding member. By constructing the structure, it is possible to achieve discharge of excess water and intrusion water for the entire length of the backfill material injection region and prevention of formation of air pockets from the sealing portion on the other end side. The quality of the backfill material after installation can be greatly improved.
[0017]
And also in the weathering structure of this other end side, like the invention which concerns on Claim 4, by inserting a hollow elastic member in the outer periphery or inner periphery of the both ends of a cylindrical member, by a hollow-shaped diameter-expansion member It is possible to easily improve the sealing performance at the crimping and fixing portion of the cylindrical member against the inner surface of the existing pipe line and the inner surface of the lining material, and to improve workability and further increase the backfilling material injection pressure. it can.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view showing a configuration in the vicinity of an end of a lining material 1 according to an embodiment of the present invention, and FIG. 2 is an enlarged view of a main part thereof. FIG. 3 is a view taken in the direction of arrow A in FIG. 1. In FIG. 3, the illustration of the inner hollow diameter-expanding member 4a is omitted in order to avoid complication of the drawing.
[0019]
This embodiment shows an example in which the present invention is applied to an existing pipe P having a circular cross section. As schematically shown in FIG. 4, the existing pipe between the manholes M1 and M2 is shown. Inside the path P, for example, a resin lining material 1 is laid in a cylindrical shape. An example of the laying structure of the lining material 1 will be described. A plurality of reinforcing rings made of steel or the like are arranged in parallel along the inner surface of the existing pipe line P, and the reinforcing rings are connected to connecting members (both not shown). And the lining material 1 is fixed to the existing pipes P so that the injected backfill material can flow in the cylinder length direction. Appropriate through holes are formed.
[0020]
Now, on the inner surface of one end portion of the lining material 1 indicated by E1 in FIG. 4, as shown in FIG. 1 and FIG. The other end of the cylindrical member 2 is also along the circumferential direction in the same manner with respect to the inner surface of the existing pipe P at a position a predetermined distance in the cylinder length direction from one end of the lining material 1. And fixed by crimping. When this crimping and fixing structure is described in detail, hollow elastic members 3a and 3b are arranged on the inner surface of the end portion of the lining material 1 and the inner surface of the existing pipe line P, respectively, and in the inner circumferential direction of the hollow elastic members 3a and 3b. Both end portions of the cylindrical member 2 are arranged alongside each other, and hollow-shaped diameter-expanding members 4a and 4b are further arranged on the inner side thereof, and the diameter of the cylindrical member 2 is increased from the inner side through the hollow-shaped elastic members 3a and 3b. By pressing toward the inner surface of the lining material 1 or the inner surface of the existing pipe line P, the cylindrical member 2 is crimped and fixed to each inner surface.
[0021]
The material of the cylindrical member 2 is obtained by sewing a canvas made of a fabric such as a woven fabric into a cylindrical shape, one end side being the inner peripheral length of the lining material 1, and the other end side being the inner peripheral length of the existing pipe line P. Sewing according to each. In addition, for the tubular member 2, a canvas and sewing having a strength capable of withstanding the injection pressure of the backfill material described later are selected.
[0022]
The hollow elastic members 3a and 3b are made of single-cell sponge rubber or the like. The specific material of the hollow elastic members 3a and 3b is a temporary material that is removed after the backfill material is injected and cured. Since there are no particular restrictions, rubber or urethane such as CR is suitable. The hardness is about Shore A25, and the flexibility corresponding to the irregularities of the inner surface of the lining material 1 and the inner surface of the existing pipe P, and the injection pressure of the backfill material against the compression by the hollow expanded members 4a and 4b It is preferable because it has rigidity that does not deform.
[0023]
As a manufacturing method of the hollow elastic members 3a and 3b, the end portions of the block-shaped members are joined with an adhesive or the like, and the outer surface shape thereof is matched with the existing pipe line P and the inner surface shape of the lining material 1. The specific shape is a shape that matches the cross-sectional shape of the pipeline, such as a ring shape if the cross-sectional shape of the existing pipeline P is circular as in the present embodiment, and a horseshoe shape if it is a horseshoe shape. The thickness in the radial direction is preferably about 10 mm because an appropriate compression allowance is obtained. The diameter and width may be adjusted appropriately on site.
[0024]
The hollow expanded members 4a and 4b have the same structure and use steel rings 41a and 41b divided into a plurality of pieces and a plurality of jacks 42a and 42b. The structure will be described with reference to FIG. 3 as a representative example of the outer hollow diameter-expanding member 4b. The divided pieces 411b forming the steel ring 41b are fitted so that adjacent ones are slidable in the circumferential direction. These are connected to each other by a jack 42b. The same applies to the inner hollow expanded member 4a. In this example, each of the hollow diameter-expanding members 4a and 4b includes two sets of steel rings 41a and 41a or 41b and 41b arranged in parallel with each other in the tube length direction of the pipe line P, such as bolts or the like. The division pieces 411a and 411a facing each other, or 411b and 411b are fixed to each other by the connecting member F. And each jack 42a, 42b is attached to the connection member F via the engaging member C provided in each both ends, and expands and contracts the jacks 42a, 42b, and two steel rings 41a, 41a, Alternatively, the diameters of 41b and 41b are increased at the same time.
[0025]
As described above, each of the hollow expanded members 4a and 4b is configured by using two steel rings 41a and 41a or 41b and 41b, respectively. Can be installed vertically. However, even if each of the hollow diameter-expanding members 4a and 4b is constituted by a pair of steel rings 41a and 41b, the same effects as this embodiment can be obtained by installing them vertically in the pipeline. Can be demonstrated. Here, the outline shape of the hollow expanded members 4a and 4b is similar to the hollow elastic members 3a and 3b, in the case of being applied to a pipe having a circular cross section as in this embodiment, When applied to a horseshoe-shaped pipeline, the shape matches the shape of the existing pipeline P, such as a horseshoe shape. Here, the hollow-shaped diameter-expanding members 4a and 4b are not limited to the above structure. For example, as an expansion bag such as a tire tube, the diameter of the cylindrical member 2 is increased by injecting air therein. You may do.
[0026]
The cylindrical member 2 is provided with a plurality of backfilling material inlets 5. The backfilling material injection port 5 may be any part that can be connected to the tip of a backfilling material injection hose (not shown), and the material thereof may be either metal or resin. As an example of the structure for attaching the backfilling material inlet 5 to the tubular member 2, as illustrated in FIG. 2, the backfilling material inlet 5 is connected to one end of the flange portion 5a via a pipe joint or the like. A long sleeve 5b engraved with a male screw is formed so that a hose can be connected, and a short sleeve 5d engraved with a male screw into which a nut 5c is engraved is formed on the other end side. . On the other hand, the cylindrical member 2 is perforated, the short sleeve 5d of the backfilling material injection port 5 is inserted into the hole, and the flange portion 5a is placed along the surface of the cylindrical member 2, so that the short sleeve 5d. By screwing the nut 5c into the cylindrical member 2, the cylindrical member 2 is sandwiched between the nut 5c and the flange portion 5a. In addition, it is preferable to harden the periphery of the hole of the cylindrical member 2 with an adhesive so that the thread does not fray, or to open the hole with a scissors and fuse the thread.
[0027]
A method for constructing the above end structure will be described. The cylindrical member 2 and the hollow elastic members 3a and 3b or the hollow diameter-expanding members 4a and 4b for constructing this end structure are carried into the existing pipeline P from the manhole M1 shown in FIG. . First, the hollow elastic member 3a is arranged on the inner surface of the end portion of the lining material 1, and the hollow elastic member 3b is arranged on the inner surface of the existing pipe line P that is separated from the outer side in the cylinder length direction by a predetermined distance. At this time, it is preferable to temporarily fix the hollow elastic members 3a and 3b with an adhesive tape or the like. Next, the cylindrical member 2 made of a water-permeable material has its one end slightly protruding inward (inner side) beyond the inner hollow elastic member 3a, and the other end is in front of the outer hollow elastic member 3b. Arrange so that it protrudes to the side (outside). Also at this time, it is preferable in terms of work that both ends of the cylindrical member 2 are temporarily fixed with an adhesive tape or the like along the inner peripheral surfaces of the hollow elastic members 3a and 3b. A plurality of backfilling material inlets 5 are attached to the tubular member 2 in advance.
[0028]
Thereafter, the inner hollow expanded member 4a is assembled inside one end of the cylindrical member 2, the jack 42a is operated to expand the diameter, and the hollow elastic member 3a is compressed and deformed via the cylindrical member 2. Thus, one end of the cylindrical member 2 is fixed to the inner surface of the lining material 1 by pressure bonding. Next, the outer hollow expanded member 4b is assembled inside the other end of the cylindrical member 2, the jack 42b is operated to expand the diameter, and the hollow elastic member 3b is compressed and deformed via the cylindrical member 2. Accordingly, the end structure shown in FIG. 1 is obtained by crimping and fixing the other end of the cylindrical member 2 to the inner surface of the existing pipe P.
[0029]
It should be noted that the other end of the existing pipe P indicated by E2 in FIG. 4 is sealed with an end structure having a structure equivalent to the above-described end structure and not provided with only the backfilling material inlet 5. Preferably, the backfilling material is injected by connecting a hose to each backfilling material inlet 5 with the other end E2 sealed. At this time, it is not necessary to wait for the sealing material to harden as in the conventional method of sealing each end portion with a curable material such as mortar, and immediately start injection of the backfilling material after the end structure is constructed. In addition, even if water flows on the inner surface of the existing pipe P, it can be reliably sealed, and furthermore, because the cylindrical member 2 made of a water permeable material is used for the sealing portion, Air and excess water are discharged to the outside through the cylindrical member 2 when the backfill material is injected, and the quality of the backfill material after curing is stabilized and the reliability is improved. Further, since the end portion of the lining material 1 is firmly crimped and fixed to the inner surface of the existing pipe line P and the inner surface of the lining material 1 by expanding the hollow diameter-expanding members 4a and 4b. Also, the injection pressure of the backfilling material can be significantly increased as compared with the case where both ends of the pipe line are sealed with a mortar or the like, and the working efficiency can be improved.
[0030]
In addition, after hardening of a backfill material, each hollow-shaped diameter-expanding member 4a, 4b, each hollow-shaped elastic member 3a, 3b, and the cylindrical member 2 are removed. In order to improve the workability at the time of removal, it is preferable to coat and apply a release material in advance to the portion in contact with the backfill material because the backfill material can be easily removed without being integrated.
[0031]
Here, in the above embodiment, each hollow elastic member 3a, 3b was disposed on the outer surface side of the cylindrical member 2, and an example in which the backfilling material inlet 5 was provided in the cylindrical member 2 was shown. However, in the present invention, the hollow elastic members 3 a and 3 b may be disposed on the inner surface side of the tubular member 2, and the backfilling material inlet 5 may be provided in the lining material 1. The example is shown by sectional drawing in FIG. 5 and FIG.
[0032]
In the example shown in FIG. 5, a hollow elastic member 3 b is disposed on the inner surface side of the tubular member 2 at the end of the tubular member 2 that is crimped and fixed to the inner surface of the existing pipe P, and a hollow shape is formed on the inner side. The cylindrical member 2 is pressure-bonded and fixed to the inner surface of the existing pipe line P through the hollow elastic member 3b by arranging the enlarged member 4b and expanding the hollow enlarged member 4b. In FIG. 5, the end of the cylindrical member 2 on the side to be crimped and fixed to the inner surface of the lining material 1 is arranged with a hollow elastic member 3a on the outer surface side in the same manner as in the previous example, and the cylindrical member A hollow diameter-expanding member 4a is disposed on the inner surface side of 2.
[0033]
In the example shown in FIG. 6, the hollow elastic members 3a and 3b are arranged on the inner surface of both ends of the cylindrical member 2, and the hollow elastic members 3a and 3b are provided by the hollow enlarged members 4a and 4b provided on the inner side. Both ends of the cylindrical member 2 are fixed to the inner surface of the lining material 1 or the inner surface of the existing pipe line P by pressure.
[0034]
5 and 6, the backfilling material inlet 5 is provided in the lining material 1 in the vicinity of the end of the cylindrical member 2. The attachment of the backfilling material inlet 5 to the lining material 1 may take the same structure as the attachment to the cylindrical member 2 described above, or a female screw is formed on the lining material 1 itself by tapping. It is good also as a structure which screwed the pipe etc. which formed the external thread in.
[0035]
Now, as in the examples of FIGS. 5 and 6 above, the hollow elastic member 3b is disposed on the inner surface side of the cylindrical member 2 at the crimping and fixing portion of the cylindrical member 2 to the existing pipe P, and the cylindrical member The structure in which the end portion is sealed in a state where the outer surface of 2 is in direct contact with the existing pipe line P can discharge the air accumulated in the upper part of the pipe line from the tubular member 2 made of a water-permeable material. It is preferable because the backfill material can be completely filled in the pipeline. Incidentally, in the previous example shown in FIGS. 1 to 3, air may accumulate by the thickness of the hollow elastic member 3b. Therefore, when the existing pipeline P is inclined, the backfilling material inlet is downward. It is preferable to provide it at the side end so that air is discharged upward when the backfill material is injected.
[0036]
5 and 6, when the backfilling material inlet 5 is provided at the end of the lining material 1, air and excess water from the backfilling material are discharged from the cylindrical member 2 made of a water permeable material. This is more preferable.
[0037]
In each of the above embodiments, the hollow elastic members 3a and 3b are respectively interposed in the inner surface of the end portion of the lining material 1 at both ends of the cylindrical member 2 and the crimping fixing portion to the inner surface of the existing pipe line. Although an example in which the unevenness of the inner surface of the existing pipe P and the inner surface of the lining material 1 is absorbed and the sealing is ensured easily has been shown, It is not always necessary to provide the elastic members 3a and 3b, and whether or not to use them can be appropriately selected according to the state of irregularities on each inner surface.
[0038]
【The invention's effect】
As described above, according to the backfilling structure for the end portion of the lining material for pipes according to the present invention, the inner surface of the end portion of the lining material and the inner surface of the existing pipe line that is separated from the position by a predetermined distance in the cylinder length direction. On the other hand, both ends of the cylindrical member made of a water-permeable material are fixed by crimping from the inside by a hollow diameter expanding member, and a backfilling material injection port is provided in the cylindrical member or a lining material in the vicinity thereof. When injecting the backfilling material into the gap between the existing pipe line and the lining material, the lining material is used as in the case where the edge of the lining material and the existing pipe line are lined with a conventional curable material such as mortar. Without waiting for the hardening of the backfilling material, the backfilling material injection operation can be started immediately, and the backfilling material injection end is securely sealed without being affected by the condition of the inner surface of the existing pipeline such as running water. Compared to the conventional injection pressure of backfill material Te can be greatly increased, thereby improving the working efficiency. Moreover, since the cylindrical member used for the sealing part uses a water-permeable material, air and excess water can be discharged to the outside when the backfilling material is injected, and the quality of the backfilling material after curing is improved. You can also
[0039]
Further, as in the invention according to claim 2, if a configuration is adopted in which both ends of the cylindrical member are crimped and fixed to the inner surface of the existing pipe or the lining material with the hollow elastic member interposed, the existing pipe Even if the inner surface of the lining material has irregularities, the sealing can be easily ensured, and the injection pressure of the backfilling material can be further increased.
[0040]
Further, as in the inventions according to claims 3 and 4, the end structure of the invention according to claim 1 or 2 is provided at one end of the lining material, and the end structure of the invention according to claim 1 or 2 is provided at the other end. By constructing the structure excluding only the backfilling material injection port from each, it is possible to reliably seal both ends of the backfilling material injection space, and to store air, surplus water or pipes over the entire length of this injection space. The intrusion water from inside and outside the road can be discharged, and a significant improvement in the quality of the placed backfill material can be achieved.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a configuration in the vicinity of an end portion of a lining material according to an embodiment of the present invention.
FIG. 2 is an enlarged view of a main part of FIG.
FIG. 3 is a view taken in the direction of arrow A in FIG. 1 and omitting the illustration of the inner hollow diameter-expanding member 4a.
FIG. 4 is an explanatory diagram of the overall configuration of an existing pipe line P and its lining material 1 to which the embodiment of the present invention is applied.
FIG. 5 is a cross-sectional view showing a configuration in the vicinity of an end portion of a lining material according to another embodiment of the present invention.
FIG. 6 is a cross-sectional view showing a configuration in the vicinity of an end portion of a lining material according to still another embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Liner material 2 Cylindrical member 3a, 3b Hollow elastic member 4a, 4b Hollow diameter-expanding member 5 Backfill material inlet P Existing pipe line

Claims (4)

An end structure of a lining material for injecting a backfill material into a gap formed between the inner surface of an existing pipe line and the lining material laid on the inner side thereof,
The inner ends of the inner ends of the lining material in the cylinder length direction and the inner surfaces of the existing pipe lines that are separated from the position by a predetermined distance outward in the cylinder length direction, the hollow ends that correspond to the both ends of the cylindrical member made of a water-permeable material respectively. A back-filling structure for an end portion of a lining material for a pipe line, wherein the back-filling material injection port is provided in the vicinity of the end portion of the lining material or in the cylindrical member while being fixed by crimping with a diameter member. A hollow elastic member is interposed between the both end portions of the cylindrical member and the inner surface of the existing pipe line or the inner surface of the lining material, or between both end portions of the cylindrical member and each hollow diameter-expanding member. The structure for backfilling of the edge part of the lining material for pipes according to claim 1, wherein: 3. The backfilling structure according to claim 1 or 2 is provided on one end side of the lining material in the tube length direction, and the other end side is separated from the inner surface of the other end by a predetermined distance from the position to the outside in the tube length direction. 3. The pipe according to claim 1, wherein both ends of a cylindrical member made of a water-permeable material are pressure-bonded and fixed to the inner surface of the existing pipe by corresponding hollow diameter-expanding members. Back-filling structure for the lining material edge. Between the both ends of the cylindrical member provided on the other end side of the lining material and the existing pipe inner surface or the inner surface of the lining material, or between the both ends of the cylindrical member and the hollow expanded member, 4. The backfilling structure for an end portion of a lining material for a pipe according to claim 3, wherein a hollow elastic member is inserted.

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