JP5675018B2 - Pipe repair method - Google Patents

Description

  The present invention relates to a pipe repair method, and more particularly to a method of repairing by filling a curable filler between a pipe inner surface and a repair material after inserting a cylindrical repair material into the pipe.

  As a method of repairing existing pipes such as sewer pipes, mortar and cement have been inserted into the gap between the pipe inner surface and the pipe repair material after inserting a pipe repair material into the pipe. There is known a method of constructing a cylindrical reinforcing structure inside a pipeline by filling and curing a curable filler such as milk.

  By the way, regarding the above repair method, when a curable filler such as mortar is filled between the pipe and the repair material, the repair material floats and the position in the pipe is shifted, or the filling pressure of the mortar or the like. There is a known problem that the repair material is deformed by this, and various countermeasures have been taken.

  For example, in Patent Document 1, a cylindrical wire mesh (steel tube) is first inserted into a pipe, and then a cylindrical repair material (intubation pipe) is inserted inside the pipe. Cement milk is filled between the inner surface and the repair material. In this way, by interposing the wire mesh between the pipe inner surface and the repair material, the repair material is prevented from being lifted (eccentric), and the strength against internal and external pressure is increased.

  Moreover, in patent document 2, after installing repair material (intubation pipe) in a pipe line, the downstream end part is plugged with a water stop valve with a siphon, and sewage is introduced into the repair material from the upstream end part. The mortar (curable filler) is filled between the repair material and the pipe inner surface in a state where the repair material is filled and water pressure is applied to the inner surface. Thereby, while preventing the repair material from floating at the time of mortar filling, the deformation of the repair material due to the filling pressure can be suppressed.

JP-A-56-131879 JP 2001-280081 A

  However, in the repair method of Patent Document 1, the tubular wire mesh (steel tube) and the repair material inserted into the wire mesh are not integrated, and the wire mesh is almost not used to improve the shape retention of the repair material. It does not contribute. Therefore, when the curable filler is filled on the outside of the repair material, the repair material may be deformed so as to be crushed by the filling pressure.

  In addition, in the method of filling sewage from the upstream side into the repair material as in Patent Document 2, there is a limit to increasing the internal water pressure that acts on the repair material, and it is higher than the filling pressure of the filler. It is difficult. Therefore, the repair material may be deformed depending on the filling pressure of the curable filler and the pipe diameter.

  The objective of this invention is providing the repair method of a pipe line which can prevent reliably the deformation | transformation of the repair material at the time of filling with a curable filler.

Means for Solving the Problems and Effects of the Invention

  The pipe line repair method according to the first aspect of the present invention includes a water stop process in which a water stop device is installed at a position upstream of a predetermined repair section and the water in the pipe is dammed in a pipe through which water flows. A hose installation step of installing a drain hose from the water stop position of the water stop device through the repair section to a position downstream of the repair section, and water drained from the repair section upstream of the drain section A metal mesh installation step of installing a tubular metal mesh in the repair section while lifting the drainage hose away from the lower part of the pipe line while flowing downstream from the repair section, and stopping by the water stop device After removing the drainage hose from the inside of the repair section while maintaining the water state, a repair is performed by installing a cylindrical repair material impregnated with a curable resin liquid inside the wire mesh while reversing the inner and outer surfaces by fluid pressure. Material installation process; A curing step of curing the curable resin liquid of the repair material, and a filling step of filling a curable filler between the inner surface of the pipe and the repair material after the curable resin liquid is cured. It is characterized by this.

  According to the present invention, after installing a cylindrical wire mesh in the repair section of the pipeline, by installing a cylindrical repair material on the inside, by curing the curable resin liquid impregnated in the repair material, The wire mesh and the repair material are bonded and integrated to improve the shape retention of the repair material. Therefore, when a curable filler is filled between the pipe inner surface and the repair material, the repair material is hardly deformed by the filling pressure.

  However, especially when the diameter of the pipeline is large, it takes a considerable amount of time to install the wire mesh in the repair section, and during that time, it is difficult to keep damming the pipeline with the water stop device. Therefore, in the present invention, a drainage hose is installed from the water stop position of the water stop device to the downstream side through the repair section, and the water on the upstream side is caused to flow downstream by this drain hose (water change), Install a wire mesh in the repair section. Thereby, the wire mesh installation process which requires time for construction can be safely performed in a dry environment where water is not present. At that time, by installing the wire mesh while lifting the drainage hose, the wire mesh can be arranged over the entire circumference including the lower portion of the pipeline.

  In addition, if the drainage hose for water replacement is pulled out after the repair material is installed in the repair section, the repair material is likely to be impregnated with the curable resin liquid, but in the present invention, the repair material is removed after removing the drainage hose. The above-mentioned impregnation unevenness is less likely to occur. However, in this case, in order to remove the drainage hose in advance, it is not possible to install the repair material while changing the water, because the water is completely blocked by the water stop device, It is preferable to complete the repair material installation process in as short a time as possible. In this respect, the present invention employs a method of installing the repair material while reversing the inner and outer surfaces by fluid pressure (so-called reversal method), so the repair material can be installed in a short time even in a long repair section. be able to.

  The pipe line repair method according to a second aspect is the method according to the first aspect, wherein the repair material is impregnated with a thermosetting resin liquid, and the repair material is heated in the curing step so that the thermosetting resin liquid is heated. Is cured.

  When the curable resin liquid of the repair material is thermosetting, in the curing process after installation of the repair material, the construction time can be shortened by heating the repair material in a short time. Curing of the curable resin liquid can be completed while damming water. Moreover, since the curing time is shortened, the equipment used for curing can be quickly removed from the site.

  In the first or second invention, the pipe repair method according to the third aspect of the present invention is such that, in the filling step, water on the upstream side of the repair section flows into the repair section, A curable filler is filled between the repair material and the repair material.

  In this way, since the water load acts on the repair material by flowing the water in the pipeline into the repair section, it is difficult for the repair material to float when the filler is filled between the inner surface of the pipeline and the repair material. Become. In particular, since the load of water acts on the lower part of the repair material on which large buoyancy acts, it is effective in preventing the lift. Further, deformation due to the filling pressure of the filler is less likely to occur at the lower part of the repair material to which the load of water acts.

  According to a fourth aspect of the present invention, in the first or second aspect of the invention, in the first or second aspect, in the filling step, a closing device having a water inlet is installed at the upstream end of the repair section, and the repair section A closing device having a drain outlet is installed at the downstream end of the device, the repair section is closed, a water injection pump is installed between the water stopping device and the upstream closing device, and the water stopping device The dammed water is pumped by the water injection pump from the water injection port of the upstream closing device into the repair section.

  According to this, the lifting of the repair material when the filler is filled with the weight of the water injected into the repair section is prevented, and deformation of the repair material is also suppressed because a high water pressure acts on the repair material. The

It is a longitudinal cross-sectional view of the pipe line which concerns on the repair method of this embodiment. It is a longitudinal cross-sectional view of the pipe line in a wire-mesh installation process. It is a figure which shows a support trolley, (a) is a side view of a support trolley, (b) is the figure which looked at the inside of the pipe line where the support trolley was distribute | arranged from the length direction. It is an expanded sectional view of a pipe line after metal mesh installation. It is a longitudinal cross-sectional view of the pipe line in a repair material installation process. It is a perspective view of a repair material. It is a partially cutaway sectional view of a pipeline after repair material installation. It is a figure which shows the resin impregnation process to a repair material. It is an expanded sectional view of the connection part with the manhole of a pipe line in the state where the repair material was inserted. It is a longitudinal cross-sectional view of the pipe line in the filling process of a curable filler. It is a perspective view of an occluding device. It is an exploded perspective view of an occluding device, (a) shows the upper part of an occluding device, and (b) shows the lower part. It is a disassembled perspective view of the division | segmentation water stop body of an obstruction | occlusion apparatus. It is a partially cutaway sectional view of a pipe line concerning a change form. It is a longitudinal cross-sectional view of a manhole in the state in which the control stick | rod which controls the movement of the obstruction | occlusion apparatus based on another modified form was installed. FIG. 16 is a perspective view of the support rod shown in FIG. 15 and a restriction rod attached to the support rod. It is a longitudinal cross-sectional view of the pipe line in the filling process of the curable filler based on another modification.

  Next, an embodiment of the present invention will be described. The present embodiment is an example in which the present invention is applied when repairing the inner surface of an existing sewer pipe (hereinafter referred to as a pipe line P) buried in the ground. FIG. 1 is a longitudinal sectional view of a pipeline P according to the repair method of the present embodiment. In the present embodiment, a large-diameter sewer pipe having a pipe diameter of about 800 to 2000 mm that can be worked by an operator inside is particularly targeted.

(Outline of repair method)
As shown in FIG. 1, two manholes M are connected to a pipeline P of a sewer pipe buried in the ground. In this embodiment, a section between two manholes M (hereinafter referred to as a repair section). Repair). As shown in FIG. 1, in the repair method of this embodiment, the water stop apparatus 10 is first installed in the position upstream of the said repair area of the pipe line P, and water stops. Next, the cylindrical wire mesh 1 is installed in the repair section. Further, the cylindrical repair material 2 is inserted into the wire mesh 1 while inverting the inner and outer surfaces thereof, and the curable resin liquid impregnated in the repair material 2 is cured. Thereafter, a curable filler 3 such as mortar is filled between the repair material 2 and the inner surface of the pipe P, and the curable filler 3 is cured. As a result, a strong reinforcing structure having a layer of the repair material 2 to be a rigid resin pipe and the curable filler 3 reinforced by the wire mesh 1 is constructed inside the pipe P. This repair method will be described in detail below step by step.

(Water stop process)
As shown in FIG. 1, water is stopped near the connection port with the manhole M in the upstream side of the repair section of the pipeline P, specifically, in the pipeline section located on the upstream side of the repair section and the manhole M. The apparatus 10 is installed. In addition, although description is abbreviate | omitted about the detail of the structure of the water stop apparatus 10, the water stop apparatus 10 has a water change pipe (illustration omitted) which has a valve mechanism inside, and the drainage hose 11 is attached to this water change pipe. By connecting, the water blocked on the upstream side can be allowed to flow to the downstream side of the repair section by the drainage hose 11 (water change) (see FIG. 2). Moreover, although the water stop apparatus 10 may be provided only in the upstream of a repair area, in order to prevent that water flows backward from a downstream side to a repair area, as shown in FIG. The water stop device 10 may also be provided at a downstream position.

(Wire mesh installation process)
FIG. 2 is a longitudinal sectional view of the pipe line P in the wire mesh installation process. After stopping the water upstream of the repair section by the water stop device 10 described above, the wire mesh 1 is installed in the repair section in a dry environment where there is no sewage. For example, a sheet-shaped wire mesh 1 cut to a predetermined width is carried into a pipe P from a manhole M, and an operator rounds the wire mesh 1 in the pipe P and joins both ends to form a cylindrical shape with a predetermined diameter. The wire mesh 1 is installed over the entire length of the repair section by repeating the work of doing. Alternatively, a plurality of arc-shaped wire mesh pieces may be formed in the tubular wire mesh 1 by connecting them in the circumferential direction in the pipe P. In addition, it is preferable to stop an intersection by welding etc. so that the wire which comprises the metal mesh 1 may not shift | deviate.

  Here, as can be seen from the contents of the work illustrated above, it takes a considerable amount of time for the worker to manually install the wire mesh 1 in the pipe P, and the longer the repair section, the longer the time required for construction. Also gets longer. Therefore, it is difficult to finish the installation of the wire mesh 1 while the water stop device 10 keeps water. Then, the installation work of the wire net | network 1 is performed, performing so-called water change which flows the water W blocked by the water stop apparatus 10 to the downstream of a repair area.

  More specifically, as shown in FIG. 2, a drain hose 11 is connected to the water change pipe of the upstream water stop device 10, and the drain hose 11 is passed through the repair section from the water stop position of the water stop device 10. To the downstream water stop device 10 (hose installation step). Although the drainage hose 11 connected to the upstream water stop device 10 may be passed from the manhole M to the downstream side of the repair section via the ground, the drainage hose 11 is connected to the repair section as shown in FIG. By passing through the inside, it is possible to reduce the occupied area on the ground at the time of water change, and to suppress as much as possible the obstruction of the passage of vehicles and the like.

  Further, as shown in FIG. 2, the drainage hose 11 is lifted and supported in the repair section so that the drainage hose 11 is separated from the lower inner surface of the pipeline P and the wire mesh 1 can be installed immediately below the drainage hose 11. The support cart 12 is carried in. FIGS. 3A and 3B are diagrams showing the support carriage 12. FIG. 3A is a side view of the support carriage 12, and FIG. As shown in FIG. 3, the support carriage 12 includes a support frame 13, four wheels 14 provided at the lower end of the support frame 13, and six rollers 15 rotatably supported on the upper portion of the support frame 13. And have. The four wheels 14 can travel on the lower inner surface of the pipe P, and the support carriage 12 can easily move in the length direction in the pipe P. Further, the drainage hose 11 is placed on and supported by six freely rotating rollers 15. Further, the support frame 13 is provided with two restriction plates 16 parallel to the traveling direction of the support carriage 12 so as to protrude upward from the six rollers 15, and the drainage hose 11 placed on the rollers 15 has 2 The drainage hose 11 is prevented from falling from the support carriage 12 by being sandwiched between the two regulation plates 16.

  Further, as shown in FIG. 2, a wire 53 is connected to the support carriage 12, and the support carriage 12 is pulled by the wire 53 when the wire 53 is wound up by a hoisting machine 18 installed on the ground. The vehicle runs from the right side to the left side in the figure. In FIG. 2, the two support carts 12 are connected by a connecting member 19 such as a wire, and the two support carts 12 travel integrally. Note that the two support carriages 12 may be individually pulled by connecting the wires 53 to cause the two support carriages 12 to run separately. Furthermore, the support cart 12 may be one.

  In this way, by installing the wire mesh 1 while lifting a part of the drainage hose 11 by the two support carts 12, it becomes possible to install the wire mesh 1 over the entire circumference of the pipeline P. When the installation of the wire mesh 1 over the entire circumference of the conduit P is completed at the position where the drainage hose 11 is lifted by the support carriage 12, two wires 53 are wound up by a winder 18 as shown in FIG. The carriage 12 is pulled in the length direction of the pipe line P (left side in the figure) and then travels to a position where the wire mesh 1 is installed. In addition, since the drainage hose 11 is mounted on the six rollers 15 of the support carriage 12, the resistance to the drainage hose 11 between the support carriages 12 when the support carriage 12 travels in the length direction of the pipe line P. Has been reduced. Therefore, the support carriage 12 can be smoothly moved in the length direction of the pipe line P with respect to the drain hose 11, and the position to be lifted can be easily shifted. Thereafter, the wire mesh 1 is installed at a position where the support carriage 12 has newly moved. By repeating this, the cylindrical wire mesh 1 is installed over the entire length of the repair section.

  FIG. 4 is an enlarged cross-sectional view of the pipeline P after installation of the wire mesh. As shown in FIG. 4, the wire mesh 1 is provided with a plurality of protrusions 17 protruding outward in the radial direction at appropriate intervals in the circumferential direction (the plurality of protrusions 17 are formed on the repair material 2. 7 is also clearly shown in FIG. 7 which is a partially cutaway perspective view of the pipeline P after installation). The plurality of protrusions 17 respectively contact the inner surface of the pipe P and serve as spacers, so that the wire mesh 1 is held at a central position in the pipe P in a state where the pipe P and the axis coincide with each other ( centering). The shape and material of the protrusion 17 are not particularly limited, but the protrusion 17 is formed of a low rigidity (low hardness) material such as synthetic resin or rubber so that the inner surface of the pipe P is not damaged by the protrusion 17. It is preferable.

(Repair material installation process)
FIG. 5 is a longitudinal sectional view of the pipeline P in the repair material installation step, FIG. 6 is a perspective view of the repair material 2, and FIG. 7 is a partially cutaway sectional view of the pipeline P after the repair material is installed. As shown in FIG. 6, the repair material 2 includes a jacket 20 that is a tubular fabric woven with warps and wefts such as polyester fibers, and a low-density polyethylene or the like provided on the outside of the jacket 20. And a cylindrical resin layer 21 made of a synthetic resin material. Furthermore, the jacket 20 of the repair material 2 is impregnated with a curable resin liquid such as an epoxy resin or an unsaturated polyester resin. In addition to the above, the repair material 2 may be one using a non-woven fabric. For example, the surface of the non-woven fabric may be covered with a resin layer and rolled into a cylindrical shape, or the non-woven fabric may be stacked on the cylindrical fabric jacket 20. In this case, the nonwoven fabric is impregnated with the curable resin liquid.

  FIG. 8 is a diagram illustrating a resin impregnation step for the repair material 2. Before the resin impregnation, the repair material 2 described above is wound around the reel 23. Then, the repair material 2 is pulled out from the outer end portion of the reel 23, and the curable resin liquid 24 is injected into the inside from the end portion, and the portion into which the resin liquid 24 is injected is conveyed by the roller conveyor 25. Further, the repair material 2 is squeezed by a pair of nip rollers 26 positioned downstream in the transport direction of the roller conveyor 25 to adjust the amount of impregnation of the resin liquid 24, and then a reel (not shown) accommodated in the pressure vessel 27. Wrap in and store.

  As shown in FIG. 5, before installing the repair material 2 described above, the water change pipe (not shown) of the water stop device 10 is closed, and the water stop device 10 is maintained while maintaining the water stop state of the water stop device 10. The drainage hose 11 is removed and removed from the repair section, and the water change is completed. Then, as shown in FIG. 5 and FIG. 7, the reversing machine 28 installed on the ground inserts the repair material 2 into the inside of the wire mesh 1 while inverting the inner and outer surfaces, and expands the diameter by the internal pressure. Paste (reversing method). More specifically, as shown in FIG. 5, fluid pressure such as pressurized air is applied to the repair material 2, and the inverted portion 2 a at the tip is advanced in the length direction of the pipe line P in the repair section. Then, the inner and outer surfaces of the repair material 2 are reversed. By employing this reversal method, the repair material 2 can be inserted into the wire mesh 1 smoothly and in a short time in the repair section. The repair material 2 has a diameter slightly smaller than the diameter of the cylindrical wire mesh 1. And after the reverse installation of the repair material 2, the outer surface (jacket 20 of FIG. 6) of the repair material 2 adheres to the wire mesh 1, and the repair material 2 and the wire mesh 1 are integrated.

  Although it is possible to install the repair material 2 (reverse insertion) while leaving the drain hose 11 in the repair section, if the drain hose 11 is pulled out after the repair material 2 is installed, the repair material 2 is cured. Non-uniformity of the impregnated resin liquid is likely to occur. Therefore, in this embodiment, the repair material 2 is installed after the drainage hose 11 is removed from the repair section. However, by removing the drainage hose 11 before installing the repair material 2 in this way, water is not changed when the repair material is installed, and the work is performed in a state where water is completely blocked by the water stop device 10. It will be. However, since the repair material 2 can be installed in a short time even in a long repair section by adopting the reversal method, the repair material is used while the water is stopped by the water stop device 10 without changing the water. 2 can be installed.

  FIG. 9 is an enlarged cross-sectional view of a connection portion of the pipeline P with the manhole M in a state where the repair material 2 is inserted. The end portion 2b of the repair material 2 is sewn so as not to be reversed. When the end portion 2b reaches the connection port between the pipe line P and the manhole M, the reversal insertion of the repair material 2 is completed. When the insertion of the repair material 2 is completed, the curable resin liquid impregnated in the repair material 2 is cured. In the case of a thermosetting curable resin liquid, a heating fluid such as heated air is supplied into the repair material 2 to heat the repair material 2 from the inside. Thereby, construction time can be shortened by hardening the curable resin liquid in the repair material 2 in a short time, and it becomes possible to complete while damming water with the water stop apparatus 10. Moreover, since the curing time is shortened, equipment such as the reversing machine 28 can be quickly removed from the ground. Although a room temperature curable resin liquid may be used, in this case, an internal pressure is applied to the repair material 2 in order to maintain the shape of the repair material 2 until the curing is completed. This is disadvantageous compared to the case of using a thermosetting resin liquid in that the reversing machine 28 cannot be removed from the ground until then.

  Thus, by hardening the curable resin liquid impregnated in the repair material 2, the cylindrical repair material 2 becomes a rigid pipe with high strength. Further, the repair material 2 and the wire mesh 1 are bonded by the curing of the curable resin liquid, the integrity of the both is increased, and the shape retention of the repair material 2 is increased.

  In the above-described impregnation step of the curable resin liquid (see FIG. 8), the repair material 2 is impregnated with a slightly larger amount (the jacket 20 is impregnated) by adjusting the squeezing amount of the nip roller 26 (releasing the squeezing slightly). It is preferable to include a curable resin liquid in an amount exceeding the amount). Thereby, it will be in the state in which the curable resin liquid exists also on the surface of the repair material 2, and the repair material 2 and the wire mesh 1 can be adhere | attached reliably.

(Filling process of curable filler)
Next, a curable filler 3 such as mortar is filled in the gap between the inner surface of the pipe P and the outer surface of the repair material 2. FIG. 10 is a longitudinal sectional view of the pipe line P in the filling step of the curable filler 3. First, before this filling step, the end portion of the repair material 2 that is inverted and inserted into the manhole M from the repair section is cut. In addition, annular sealing plates 29A and 29B are attached to both ends of the repair material 2 to prevent leakage of the curable filler 3 filled between the inner surfaces of the pipes P. Here, a filling hole is formed in one sealing plate 29A (right side in FIG. 10), and this filling hole is connected to a filling pump (not shown) installed on the ground via a hose 22. . Then, the curable filler 3 pumped by the filling pump is filled between the inner surface of the pipe P and the repair material 2 (the space in which the wire mesh 1 is installed) via the hose 22. Although not shown, it is preferable that a part of the sealing plates 29 </ b> A and 29 </ b> B is formed with a ventilation portion made of a nonwoven fabric or the like so that air can be discharged when the curable filler 3 is filled.

  Furthermore, in this embodiment, in order to prevent the repair material 2 from being lifted or deformed when the curable filler 3 is filled, the above filling step is performed after introducing the sewage W in the pipeline P into the repair section. Do. Specifically, as shown in FIG. 10, first, a blocking device 30 </ b> A having a water injection port 31 is installed at an upstream end portion (a connection portion with the upstream manhole M) of the repair section, and a downstream end of the repair section. A blocking device 30B having a drain port 32 is installed in the portion (connecting portion with the downstream manhole M), and the repair section is closed by these two blocking devices 30A and 30B. Moreover, the water stop apparatus 10 (refer FIG. 5) installed in the downstream of a repair area is removed. Moreover, the water injection pump 33 is installed between the water stop device 10 and the closing device 30A on the upstream side of the repair section, and the water replacement pipe and the water injection pump 33 of the water stop device 10 and the injection of the water injection pump 33 and the plugging device 30A are added. The water ports 31 are connected by hoses 34 and 35, respectively. On the other hand, a pipe 36 with a stop valve 37 is attached to the drain port 32 of the downstream closing device 30B.

  The water W blocked by the water stop device 10 is slightly opened by the water stop pump 37 while the drain port 32 of the downstream close device 30B is slightly opened by the shut-off valve 37. The water is pumped into the repair section and filled with water W while discharging air in the repair section. Thereby, a load of water W acts on the repair material 2 installed in the repair section, and a high water pressure acts on the inner surface of the repair material 2. Thereafter, the drainage port 32 is further opened by the shut-off valve 37, and water is discharged from the drainage port 32 to adjust the water pressure in the repair section, and the curable filler 3 is filled. Thereby, the lifting of the repair material 2 when the filler 3 is filled is prevented, and the deformation of the repair material 2 is also suppressed.

  After the curable filler 3 is filled, the curable filler 3 is cured by leaving the repair material 2 filled with water W and applying a water pressure for a certain period of time. As a result, a rigid repair material 2 in which the curable resin liquid is cured inside the pipe P, and a curable filler 3 reinforced by the wire mesh 1 in the gap between the repair material 2 and the inner surface of the pipe P. Thus, a strong reinforcing structure is constructed. In addition, when the amount of water blocked by the water stop device 10 is increased during standing (while the filler 3 is being cured), the shut-off valve 37 of the downstream closing device 30B is opened and the drain port 32 is opened. The water volume on the upstream side of the water stop device 10 may be reduced by pumping water W into the repair section with the water injection pump 33 while draining water in the repair section. Alternatively, the downstream closing valve 37 of the closing device 30B on the downstream side is always opened, and water is continuously pumped from the water injection pump 33 into the repairing section, so that the downstream side passes through the repairing section from the upstream side of the repairing section. The water W may continue to flow.

  Next, the structure of the closing device 30 will be described in detail with an example. FIG. 11 is a perspective view of the closure device 30. 12 is an exploded perspective view of the occluding device 30, wherein (a) shows the upper portion of the occluding device 30 and (b) shows the lower portion. In the following description of the occlusion device 30, the front side of FIG. 11 is defined as the front (front), and the expressions “front” and “rear” are used as appropriate. Further, the closing device 30 described below has an opening, and when installed on the upstream side of the repair section, the opening is used as the water injection port 31 and is installed on the downstream side of the repair section. In such a case, the opening can be used as the drain port 32. That is, the closing device 30 having the same structure can be used on the upstream side and the downstream side of the repair section.

  As shown in FIGS. 10 to 12, the closing device 30 is provided on an annular device main body 40, a plurality of divided water blocking bodies 41 attached to the front end surface of the device main body 40, and the outer peripheral surface of the device main body 40. An annular tube 42 and the like. 11 and 12, the illustration of the annular tube 42 of the closing device 30 shown in FIG. 10 is omitted.

  The apparatus main body 40 is divided into a plurality of (for example, six) arc-shaped segments 43 and has an annular structure in which the segments 43 adjacent to each other in the circumferential direction are connected by bolts. Further, a protective member 44 made of rubber or the like is fixed to the front end surface of the segment 43 with an adhesive, and the apparatus main body 40 is connected to the pipe line by projecting the protective member 44 in the radial direction from the outer periphery of the segment 43. When the inner surface of P is contacted, the inner surface of the pipe P is prevented from being damaged. The segments 43 are designed so that each size can pass through the upper opening of the manhole M.

  A plurality of fan-shaped split waterstops 41 are respectively attached to the front end surface of the apparatus main body 40. FIG. 13 is an exploded perspective view of the split waterstop body 41. As shown in FIG. 13, each divided water stop body 41 includes a fan-shaped water stop film 45 formed of a flexible material such as tarpaulin, and two fan-shaped members 46 that sandwich the water stop film 45 in the front-rear direction. Each fan-shaped member 46 has four rod-like portions 46a extending radially, and is formed in a fan shape by connecting inner ends and outer ends of the four rod-like portions 46a. Further, among the plurality of divided water stopping bodies 41 (41A, 41B), in the two divided water stopping bodies 41B located on the lower side of FIG. 11, the water stopping film 45 becomes the water injection port 31 or the drain port 32. A hole 45a (opening) is formed, and the fan-shaped member 46 is formed with a ring 48 for pressing around the hole 45a. As shown in FIG. 12B, a connection fitting 51 for connecting the pipe 36 and the hose 34 (see FIG. 10) is fixed to the ring 48.

  As shown in FIG. 13, a fan frame-shaped packing 47 is stacked on one (rear) fan-shaped member 46 of the divided waterstop 41. And after dividing the fan-shaped member 46, the water stop film 45, the fan-shaped member 46, and the packing 47 in order, it integrates with a volt | bolt, and the one division | segmentation water stop body 41 (41A, 41B) is comprised. In addition, the plurality of water blocking bodies 41 are attached to the front end surface of the annular device main body 40 (the plurality of segments 43) via the packing 47 in a state of being arranged in the circumferential direction, thereby closing the inside of the device main body 40. It is like that. In addition, in FIG.12 (b), although the example in which the two water blocking bodies 41B which have the hole 45a (opening) in the water blocking film 45 exist among the some division water stopping bodies 41 is shown, the number of openings is shown. (The number of split waterstop bodies 41B having the holes 45a) can be changed as appropriate. The split waterstop 41 is also designed to have a size that can pass through the upper opening of the manhole M, like the segment 41.

  As shown in FIG. 12, each of the plurality of sector-shaped split waterstops 41 has an outer peripheral portion fixed to a segment 43 with bolts, and an inner peripheral portion disposed on the inner central portion of the apparatus main body 40. 49 is fixed with bolts. Further, the same number of concave portions 49a as the segments 43 are formed in the circumferential direction at equal intervals in the outer peripheral portion of the disk 49, and the concave portions 43a are also formed in the central portions in the circumferential direction of the front end surfaces of the plurality of segments 43. ing. A plurality of elongated connecting plates 50 are bridged between the plurality of recesses 49 a of the disk 49 and the plurality of recesses 43 a formed in the plurality of segments 43, respectively. That is, the plurality of segments 43 and the disk 49 arranged on the inner side thereof are coupled by the plurality of coupling plates 50. Further, stepped portions (not shown) are formed at both ends in the width direction of each connecting plate 50, and two divided waterstops 41 arranged on both sides in the circumferential direction of one connecting plate 50 are connected to each other. It is fixed to the segment 43 and the disk 49 in a state where the two stepped portions of 50 are overlapped. In other words, the plurality of connecting plates 50 support the divided water blocking body 41 that receives water pressure from the back side, and also serve to seal between the two divided water blocking bodies 41 adjacent in the circumferential direction.

  An annular tube 42 shown in FIG. 10 expands by air injection, such as a rubber tube, for example, and expands in a state of being provided on the outer peripheral surface of the annular device body 40, thereby The gap between the outer peripheral surface and the inner surface of the repair material 2 is closed.

  A method for installing the closing device 30 in the pipe P will be described. First, the annular tube 42 is carried into the manhole M, and the annular tube 42 is put into the repair material 2 from the manhole M. Next, a plurality of segments 43 are carried inside the annular tube 42 and connected in the circumferential direction to assemble the annular device body 40, and the plurality of divided waterstops 41 are attached to the end surface of the device body 40. Then, air is supplied into the annular tube 42 on the outer side of the apparatus main body 40 to be expanded, and the apparatus main body 40 is fixed to the pipe line P while closing a gap between the apparatus main body 40 and the inner surface of the repair material 2. .

  In the repair method of the pipe line P of the present embodiment described above, the curable resin liquid impregnated with the cylindrical repair material 2 installed in the repair section is cured, so that it is rigid and has shape retention. In addition, the tube is bonded to and integrated with a cylindrical wire mesh 1 on the outside. Therefore, the shape retaining property of the repair material 2 is improved, and the repair material 2 is prevented from being deformed by the filling pressure of the curable filler 3 filled between the repair material 2 and the inner surface of the pipe P. The thinner the wire constituting the wire mesh 1, the better the resin wraps the wire, and the better the adhesion between the wire mesh 1 and the repair material 2.

  Further, in the wire mesh installation process, the drain hose 11 is installed from the water stop position of the water stop device 10 to the downstream position through the repair section, and the upstream hose 11 allows the upstream water to flow downstream ( By replacing the water) and installing the wire mesh 1 in the repair section, it is possible to safely perform the wire mesh installation process that requires time for construction in a dry environment without water. At that time, by installing the wire mesh 1 while lifting the drainage hose 11, the wire mesh 1 can be disposed over the entire circumference including the lower portion of the pipeline P.

  Moreover, in the repair material installation process of FIG. 5, since the repair material 2 is installed after removing the drainage hose 11 from the repair section, the repair material 2 is less likely to be impregnated with resin. In this case, the water replacement is not performed in the repair material installation process, and the work is performed in a state where the water is completely blocked by the water stop device 10, so that it is preferable to perform it in as short a time as possible. . In this respect, since the reversal method is employed in this embodiment, the repair material 2 can be installed in a short time even in a long repair section.

  The cylindrical wire mesh 1 is held at the center position of the pipe P by a plurality of projections 17 protruding radially outward and functioning as spacers (centering), and when the curable filler 3 is filled, the wire mesh 1 and The repair material 2 is prevented from floating. In addition, since the wire mesh 1 is centered in the pipe P, the gap between the repair material 2 closely attached to the wire mesh 1 and the inner surface of the pipe P, that is, the filling thickness of the curable filler 3 is obtained. Is uniform in the circumferential direction, the strength of the layer of the curable filler 3 is increased. Note that the heights of the plurality of protrusions 17 do not have to be all equal, and may be different from each other. For example, it is possible to intentionally vary the filling thickness of the curable filler 3 by changing the height of the protrusion 17 vertically or horizontally.

  Further, in the present embodiment, as shown in FIG. 10, when the curable filler 3 is filled, the repair section is closed by the two closing devices 30 </ b> A and 30 </ b> B, and then the water stopping device 10 is used for blocking. Water is pumped into the repair section by a water injection pump 33. Therefore, lifting of the repair material 2 when the filler is filled with the weight of water filled in the repair section is prevented, and deformation of the repair material 2 is also suppressed because a high water pressure acts in the repair material 2. Is done. Further, since the repair material 2 is not easily lifted and deformed when the curable filler 3 is filled, the number of the protrusions 17 provided on the wire mesh 1 and functioning as spacers is reduced. It is also possible.

  Next, modified embodiments in which various modifications are made to the embodiment will be described. However, components having the same configuration as in the above embodiment are given the same reference numerals and description thereof is omitted as appropriate.

1] In the above-described embodiment, one wire mesh 1 is installed in the pipe P. However, a plurality of wire meshes 1 may be stacked in accordance with the required strength. As shown in FIG. 14, in addition to the wire mesh 1, a cylindrical reinforcing frame 52 made of a steel rod or the like may be installed outside the wire mesh 1 to further improve the strength.

2] The occlusion device 30 prevents the occlusion device 30 from moving to the manhole M side due to high water pressure in the repair zone when water is pumped into the repair zone blocked by the occlusion device 30 by the water injection pump 33. A member for restricting the movement of the to the manhole M may be provided. An example is given below.

  FIG. 15 is a vertical cross-sectional view of the manhole M in a state where a restriction rod 63 that restricts the movement of the closing device 30 is installed. First, two fixing members 61 made of H steel and extending in the vertical direction are fixed with anchors at positions where the connection port 60 with the pipe line P is sandwiched between the inner wall surfaces of the manhole M. Next, on the inner wall surface of the manhole M, the two steel support rods 62 are horizontally bridged and fixed across the two fixing members 61 on the left and right sides of the connection port 60 at positions where the connection port 60 is sandwiched vertically.

  Then, a plurality of steel control rods 63 are attached to the upper and lower support rods 62. FIG. 16 is a perspective view of the support bar 62 and the regulation bar 63 attached to the support bar 62. As shown in FIG. 16, a plurality of cuts 62a are formed at intervals in portions of each support rod 62 facing the inner wall surface of the manhole M in which the connection port 60 is formed. Then, a plurality of (three in the figure) regulating rods 63 are respectively inserted into the plurality of cuts 62a of the two supporting rods 62, so that the connection port 60 with the pipe line P is straddled on the inner wall surface of the manhole M. In this way, a plurality of restriction rods 63 are fixed. When the closing device 30 shown in FIG. 11 and FIG. 12 is used, the regulating rod 63 is provided at a position where it contacts the back surface of the disk 49 that receives the water pressure acting on the plurality of divided water blocking bodies 41. It is preferable.

  Thereby, even if a high water pressure in the repair section acts on the closing device 30, the movement of the closing device 30 to the manhole M is restricted because the plurality of regulating rods 63 abut against the closing device 30. In addition, by providing a member (restricting rod 63) that restricts the movement of the closing device 30 as described above, it is possible to adopt a simple and lightweight closing device that may move by water pressure alone. It becomes easy to carry in and assemble.

3] As shown in FIG. 17, in the filling step of the curable filler 3, the upstream water stop device 10 is also removed, and the water W from the upstream side of the repair section is put into the repair section (the repair material 2). You may make it flow. Alternatively, the filling step may be performed while the water W blocked by the water stop device 10 is allowed to flow from the water change pipe into the downstream repair section without removing the water stop device 10. Thus, since the load of water acts on the repair material 2 by flowing the water W in the pipeline P into the repair section, when the filler 3 is filled between the inner surface of the pipeline P and the repair material 2 In addition, the repair material 2 is difficult to lift. In particular, since the load of water W acts on the lower part of the repair material 2 on which a large buoyancy acts, it is effective in preventing the lift. Moreover, in the lower part of the repair material 2 on which the load of the water W acts, deformation due to the filling pressure of the curable filler 3 is less likely to occur.

4] When the wire mesh 1 is installed in the repair section, the method of lifting the drainage hose 11 for changing water is limited to the method using the support carriage 12 (see FIG. 2) running in the pipe P described above. I can't. For example, the wire mesh 1 may be installed while suspending the drain hose 11 with a wire or the like passed through the pipeline P.

5] Although the embodiment described above and its modification are examples in which the present invention is applied to repair of sewer pipes, the present invention is applied to repair of other existing pipes such as water pipes and agricultural water pipes. Is also possible.

DESCRIPTION OF SYMBOLS 1 Wire mesh 2 Repair material 3 Hardening filler 10 Water stop device 11 Drain hose 30 Closure device 31 Water inlet 32 Water outlet 33 Water injection pump P

Claims (4)

In a pipe line through which water flows, a water stop process for installing a water stop device at a position upstream of a predetermined repair section and damming the water in the pipe line,
A hose installation step of installing a drainage hose from the water stop position of the water stop device to the downstream position through the repair section;
The drainage hose is allowed to flow away from the lower part of the pipeline while the water blocked on the upstream side of the repairing section is caused to flow downstream from the repairing section by the drainage hose. Wire mesh installation process of installing a wire mesh,
After removing the drainage hose from the inside of the repair section while maintaining the water stop state by the water stop device, the metal mesh is reversed while the inner and outer surfaces of the cylindrical repair material impregnated with the curable resin liquid are reversed by fluid pressure. Repair material installation process to be installed inside,
A curing step of curing the curable resin liquid of the repair material;
A pipe line repairing method comprising a filling step of filling a curable filler between the pipe inner surface and the repair material after the curable resin liquid is cured.   The pipe repair method according to claim 1, wherein the repair material is impregnated with a thermosetting resin liquid, and the thermosetting resin liquid is cured by heating the repair material in the curing step. .   The filling step is characterized in that a curable filler is filled between the pipe inner surface and the repair material while flowing water upstream of the repair section into the repair section. 2. The method for repairing a pipeline according to 2. In the filling step, a closing device having a water injection port is installed at the upstream end of the repair section, and a closing device having a drain port is installed at the downstream end of the repair section. Occluded,
A water injection pump is installed between the water stop device and the upstream closing device, and the water blocked by the water stop device is inserted into the repair section from the water inlet of the upstream block device by the water injection pump. 3. The method for repairing a pipeline according to claim 1 or 2, wherein the pressure is fed.

Images