JP5205112B2 - Curing state inspection method of lining material and rehabilitation method of sewer pipe - Google Patents

Description

  The present invention relates to a cured state inspection method for inspecting the cured state of a lining material containing a curable resin disposed inside a sewer pipe, and a method for rehabilitating a sewer pipe using this method.

Pipings buried mainly in the ground such as water and sewage pipes and gas conduits are deteriorated due to various factors such as corrosive gas and ground subsidence, for example, when used for a long period of time. As a method for repairing such deteriorated piping, there is a so-called rehabilitation method. In this method, for example, a lining material (for example, FRP (Fiber Reinforced Plastic)) containing a curable resin or the like is inserted into a deteriorated pipe, the resin is cured by heat or light, and the inner surface of the pipe has a predetermined thickness. The pipe is rehabilitated by covering with a lining material or forming a new pipe.
In piping (rehabilitated pipe) rehabilitated by such a rehabilitation method, for example, an inspection device and a method for inspecting the thickness of the lining material of the rehabilitated pipe have been studied as quality control after construction (Patent Literature). 1).

Japanese Patent No. 3925470

In the rehabilitation method using a lining material containing a curable resin, if the curable resin contained in the lining material is not sufficiently cured after construction, it will easily deteriorate in the uncured part, or the inner surface of the rehabilitated pipe due to external pressure There is a risk that the quality of the rehabilitated pipe will deteriorate, such as swelling. Therefore, it is important to grasp the cured state of the curable resin. In particular, in a sewer pipe, when a curable resin is cured, if there is a partial accumulation of water or the like, an uncured portion is likely to be generated without being heated to an appropriate temperature.
However, as described in Patent Document 1, although the method for inspecting the thickness of the lining material of the rehabilitated pipe has been studied conventionally, in order to grasp the cured state of the curable resin contained in the lining material. There is almost no examination about the inspection method, and there is no established inspection method at present.

  In view of the above circumstances, the present invention provides a cured state inspection method for inspecting the cured state of a lining material containing a curable resin disposed inside a sewer pipe, and rehabilitation of a sewer pipe using this method. It aims to provide a method.

Means and effects for solving the problems

The present invention relates to a cured state inspection method for inspecting a cured state of a lining material including a curable resin disposed inside a sewer pipe, and a method for rehabilitating a sewer pipe.
And the hardening state test | inspection method of the lining material which concerns on this invention, and the rehabilitation method of a sewer pipe have the following some features, in order to achieve the said objective. That is, the method for inspecting the cured state of the lining material and the method for rehabilitating the sewer pipe according to the present invention include the following features alone or in combination as appropriate.

Wherein the cured state inspection how the lining material according to the present invention for achieving the above object, the cured state inspection method for inspecting a hardened condition of the lining material including the interior and arranged curable resin sewerage An ultrasonic transmission probe capable of transmitting ultrasonic waves is disposed without contacting the lining material, and an ultrasonic reception probe capable of receiving ultrasonic waves is disposed in the ultrasonic transmission. The ultrasonic transmission probe and the ultrasonic reception probe are arranged at a position away from the probe for contact with the lining material. Disposed in the circumferential direction and disposed at the same position in the cylinder axis direction of the lining material, and transmits ultrasonic waves from the ultrasonic transmission probe toward the lining material, and the ultrasonic waves The echo transmitted through the lining material Received by the ultrasonic probe wave reception, the estimated state of cure of the lining material on the basis of the echo waveform received by the ultrasonic receiving transducer, said ultrasonic receiver and the ultrasonic transmitter for probe Moving the probe in the cylinder axis direction and inspecting the cured state of the lining material over the cylinder axis direction .

According to this configuration, if there is an uncured portion in the path through which the ultrasonic echo transmitted from the ultrasonic transmission probe is transmitted to the ultrasonic reception probe in the lining material, The acoustic wave receiving probe detects an echo waveform different from the case where there is no uncured portion. Thereby, the presence or absence of the uncured portion in the lining material can be confirmed.
In addition, it is possible to check the presence or absence of uncured parts without bringing an ultrasonic transmission probe and an ultrasonic reception probe into contact with the lining material, and inspecting a predetermined range through which ultrasonic waves pass. As a result, the inspection work efficiency can be improved.

The front Stories and ultrasonic probe wherein the ultrasonic receiver and ultrasonic transmitter for probe, along with being spaced apart in the circumferential direction of the lining material which is formed in a cylindrical shape, the cylinder axis direction of the lining material in that are located in the same position.

  According to this configuration, when there is an uncured portion at the position where the ultrasonic wave transmitted from the ultrasonic transmission probe is incident on the lining material and the portion of the lining material at the same position in the cylinder axis direction, An echo waveform remarkably different from the case where no hardened portion is present is detected. Thereby, the presence or absence of the uncured portion in the lining material can be reliably confirmed.

The sewer pipe rehabilitation method according to the present invention is characterized by inserting a lining material containing an uncured curable resin that is cured by heating into the sewage pipe, and curing the lining material. In the method of rehabilitating the sewer pipe, the heating fluid is supplied to the inner surface side of the lining material so that the uncured lining material is heated and cured, and the lining material is being heated by the heating fluid. in, using the above cured state inspection method to inspect a hardened condition of the lining material is to control the heating condition of the lining material on the basis of the inspection results of the cured state.

  According to this configuration, since the lining material can be heated and cured while grasping the cured state of the lining material, the heating process can be terminated immediately after the lining material is completely cured. Further, in the past, it was difficult to detect the uncured portion unless the heating process was finished once and the end of the lining material was opened, but in this configuration, the uncured portion was not removed after the heating process for a predetermined time. If detected, additional heating can be performed as is so that no uncured portion remains. It is also possible to heat the lining material under heating conditions suitable for the cured state of the lining material that changes over time. Thereby, it becomes possible to perform efficiently the process of heat-hardening an uncured lining material.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

(About inspection target)
FIG. 1 is a diagram schematically showing a sewer pipe 2 in which a lining material 1 is disposed. The lining material 1 is an inspection object by the cured state inspection method of the present invention. The lining material 1 is disposed on the inner surface of the sewer pipe 2 using, for example, a rehabilitation method of the sewer pipe such as an inversion method or a forming method. In some cases, the lining material is bonded to the inner surface of the sewer pipe, and in other cases, the lining material is not bonded to the inner surface of the sewer pipe.

  Here, the reversal method is, for example, inserting a hose material containing a thermosetting resin into a sewer pipe while being reversely pressurized, and heating the resin in a pressurized state in the sewer pipe, so that the inner surface of the sewer pipe It is a method of attaching a hose material or forming a new pipe. Also, the forming method is, for example, drawing a hose material containing a thermosetting resin into a sewer pipe, expanding and heating the hose material with air and steam, and pasting the hose material on the inner surface of the sewer pipe, or This is a method of forming a new pipe. In these rehabilitation methods, for example, when a hose material containing a photo-curing resin such as an ultraviolet-curing resin is used, the resin is cured by irradiating light such as an ultraviolet ray so that the hose material is disposed on the inner surface of the sewer pipe. It is also possible to stick it on or form a pipe.

  The lining material 1 is composed of, for example, a sheet (SMC) made of a thickened curable resin liquid and a fiber material, or a material obtained by impregnating a long fiber material with a thermosetting resin liquid. As the thermosetting resin, for example, an unsaturated polyester resin that is cured by heating at about 80 ° C. for a predetermined time is used. For example, glass fiber is used as the fiber material included in the lining material 1.

  If the cured state inspection method of the present invention is used, not only when an unsaturated polyester resin is used as the thermosetting resin, but also when other thermosetting resins such as an epoxy resin are used. Even if it exists, the hardening state of a lining material can be test | inspected. Moreover, even if it is the case where carbon fiber, an aramid fiber, etc. are used not only when the glass fiber is used as a fiber material of the lining material 1, the hardening state of a lining material can be test | inspected. . Furthermore, even when the lining material 1 contains a photocurable resin and is cured by light irradiation, the cured state can be inspected.

(Inspection method)
Hereinafter, the hardening state inspection method of the lining material according to the embodiment of the present invention will be specifically described.
FIG. 2 is a schematic diagram showing a state in which an inspection apparatus used for carrying out the present invention is installed.
As shown in FIG. 2, the inspection apparatus includes an ultrasonic transmission probe 10, an ultrasonic reception probe 20, an inspection apparatus main body (not shown) to which these are connected via a cable, Have The lining material 1 to be inspected is formed so as to have an outer diameter of about 300 mm and a thickness of about 5 mm.

  The ultrasonic transmission probe 10 emits ultrasonic waves from an end surface facing the lining material 1 toward an A1 position (see FIGS. 2 to 4, hereinafter referred to as an ultrasonic radiation position A1) on the inner surface of the lining material 1. Installed to make outgoing calls. The ultrasonic wave transmitting probe 10 is installed so that the end surface from which the ultrasonic wave is transmitted is separated from the inner surface of the lining material 1 by about 20 mm.

  The ultrasonic receiving probe 20 is installed with the end face capable of receiving ultrasonic waves facing the inner surface of the lining material 1. Thereby, the ultrasonic wave which injects into the said end surface from the lining material 1 side can be received. The ultrasonic wave receiving probe 20 enters the inside of the lining material 1 from the ultrasonic radiation position A1 and passes through as it is, and the B1 position on the inner surface of the lining material 1 (see FIGS. 2 to 4; hereinafter, ultrasonic waves). The ultrasonic wave traveling toward the end face of the ultrasonic wave reception probe 20 from the reception position B1) is installed so as to be capable of receiving at least.

  Then, the inspection apparatus transmits the ultrasonic wave by the ultrasonic wave transmission probe 10 after transmitting the amplitude of the ultrasonic echo received by the ultrasonic wave reception probe 20 and the ultrasonic wave transmission probe 10. Thus, the time until the ultrasonic echo is received (hereinafter referred to as propagation time) can be measured. The measured echo waveform and the like are displayed on a display device (not shown) and the like so that the operator can confirm the echo waveform and the like.

  In the present embodiment, the cylindrical central axis C and the ultrasonic radiation position A1 in the lining material 1 between the ultrasonic radiation position A1 and the ultrasonic reception position B1 in the cylindrical axis direction (direction parallel to the cylindrical central axis C). Whether or not an uncured portion is included in a cross section of the lining material 1 by a plane including the cross section and including a ultrasonic radiation position A1 (a cross section indicated by S1 in FIG. 4 described later, hereinafter referred to as a measurement cross section S1). Can be confirmed. In addition, as shown below, the presence or absence of an unhardened part is confirmed by comparing with the measurement result when the measurement cross section S1 does not have an uncured part (completely cured state).

  FIG. 3 is a schematic view of the measurement state viewed from the ultrasonic transmission probe 10 side in the cylindrical axis direction of the lining material, and FIG. 4 is a cross-sectional view taken along the line YY ′ in FIG. C is a schematic cross-sectional view of a plane including C and the ultrasonic radiation position A1.

  As shown in FIG. 3, the ultrasonic transmission probe 10 is installed so as to be able to transmit ultrasonic waves in a direction from the cylindrical central axis C toward the outside in the radial direction when viewed from the cylindrical axis direction. Further, as shown in FIG. 4, the ultrasonic transmission probe 10 is arranged so that the ultrasonic transmission direction (indicated by an arrow in the figure) faces the ultrasonic reception probe 20 side. Is arranged so that the inclination θ1 between the transmission direction and the cylindrical axis direction is about 45 °. Further, the ultrasonic transmission probe 10 and the ultrasonic reception probe 20 are arranged so that the distance L between the ultrasonic radiation position A1 and the ultrasonic reception position B1 is, for example, about 80 mm.

  The ultrasound receiving probe 20 is installed at a position that substantially overlaps the ultrasound transmitting probe 10 when viewed from the cylindrical axis direction. Further, as shown in FIG. 4, the ultrasonic wave receiving probe 20 has an end capable of receiving ultrasonic waves directed toward the ultrasonic wave transmitting probe 10 side and ultrasonic waves from the ultrasonic wave receiving position B1. The inclination θ2 between the direction toward the receiving probe 20 (the direction indicated by the arrow in the figure) and the cylindrical axis direction is arranged to be substantially the same (about 45 °) as θ1.

  FIG. 5 is a diagram illustrating a waveform of an ultrasonic echo received by the ultrasonic wave reception probe 20 from the ultrasonic wave transmission probe 10 when the portion indicated by X1 in FIG. 4 is uncured. . FIG. 6 shows a waveform of an ultrasonic echo received by the ultrasonic wave reception probe 20 from the ultrasonic wave transmission probe 10 when the lining material 1 is completely cured at all positions. FIG.

  5 and 6, the horizontal axis represents the ultrasonic propagation time (μs), and the vertical axis represents the amplitude voltage value (V) of the echo received by the ultrasonic wave receiving probe 20. The measurement result is obtained by transmitting an ultrasonic wave having a frequency of 200 kHz from the ultrasonic transmission probe 10.

As shown in FIGS. 5 and 6, regardless of the presence or absence of an uncured portion, a waveform W1 (first waveform W1) having substantially the same amplitude is measured in a region where the propagation time is 50 μs or less. Thereafter, the amplitude decreases, and the amplitude increases when the propagation time passes 200 μs. In particular, a waveform W2 (second waveform W2) having a relatively large amplitude is measured in the region of 200 to 300 μs. The second waveform W2 includes the waveform of the first transmitted wave.
The amplitude of the second waveform W2 and the amplitude of the waveform observed after the second waveform W2 is observed are different between FIG. 5 and FIG. That is, the case where the uncured portion is included (FIG. 5) is observed after the amplitude of the second waveform W2 and the second waveform W2 are observed, compared to the case where the uncured portion is not included (FIG. 6). The amplitude of the waveform is small.

  When the measurement cross section S1 includes an uncured portion, it is observed after the amplitude of the second waveform W2 and the second waveform W2 are observed, compared to the case where the measurement cross section S1 does not include an uncured portion. The amplitude of the waveform becomes smaller. Thereby, the presence or absence of the unhardened part in the said measurement cross section S1 can be confirmed.

  In the present embodiment, the case where the measurement is performed at 200 kHz is shown. However, the present invention is not limited to this. By changing the type of the probe 10 for transmitting an ultrasonic wave, the frequency of the transmitted ultrasonic wave is appropriately changed. It is possible to measure. In this example measured at 200 kHz, the waveform of the second waveform W2 is easier to see and it is easy to confirm the presence or absence of an uncured portion.

  Next, in FIG. 7 to FIG. 10, for the four lining materials having different curing conditions, the ultrasonic transmission probe 10 and the ultrasonic reception probe 20 are arranged in the same manner as in the above-described embodiment, The result of having measured the echo of the ultrasonic wave transmitted from the ultrasonic wave transmitting probe 10 by the ultrasonic wave receiving probe 20 is shown.

FIG. 7 shows the measurement results of the lining material heated at 70 ° C. for 4 hours.
FIG. 8 shows the measurement results when the lining material heated under the same conditions as the lining material shown in FIG. 7 was further heated at 80 ° C. for 1 hour.
FIG. 9 shows the measurement results when the lining material heated under the same conditions as the lining material shown in FIG. 7 was further heated at 80 ° C. for 4 hours.
FIG. 10 shows the measurement results of a completely cured lining material.
Note that the lining materials whose measurement results are shown in FIGS. 7 to 9 each include an uncured portion and have not been completely cured.

  As shown in FIGS. 7 to 10, the amplitude of the second waveform W <b> 2 measured in the region where the propagation time is about 130 to 250 μs increases as the lining material has a longer heating time. That is, it can be said that the lining material having a higher degree of curing has a larger amplitude of the second waveform W2. As shown in FIG. 10, the amplitude of the second waveform W2 of the completely cured lining material is the largest. Thus, the degree of curing can be estimated from the amplitude of the second waveform W2.

  As described above, in the method for inspecting the cured state of the lining material according to this embodiment, the ultrasonic wave transmitting probe 10 for transmitting ultrasonic waves is disposed without contacting the inner surface of the lining material 1. At the same time, the ultrasonic wave receiving probe 20 for receiving the ultrasonic wave is disposed at a position away from the ultrasonic wave transmitting probe 10 without contacting the inner surface of the lining material 1, and ultrasonic wave transmission is performed. The ultrasonic echo transmitted from the probe 10 toward the lining material 1 is detected by the ultrasonic receiving probe 20, and the lining material is based on the waveform of the echo detected by the ultrasonic receiving probe 20. 1 is estimated.

According to this configuration, in the lining material 1, when an uncured portion exists in a path through which an ultrasonic echo transmitted from the ultrasonic transmission probe 10 passes and is transmitted to the ultrasonic reception probe 20. The echo receiving probe 20 detects an echo waveform having a smaller amplitude than when no uncured portion is present. Thereby, the presence or absence of the uncured part in the lining material 1 can be confirmed.
Moreover, since the presence or absence of the uncured portion can be confirmed without bringing the ultrasonic transmission probe 10 and the ultrasonic reception probe 20 into contact with the lining material 1, workability is good.

  In the present embodiment, the ultrasonic transmission probe 10 and the ultrasonic reception probe 20 are arranged apart from each other in the longitudinal direction of the longitudinally formed lining material 1 and the lining material. It is arrange | positioned on the same axis line extended in parallel with 1 longitudinal direction. More specifically, the ultrasonic transmission probe 10 and the ultrasonic reception probe 20 are arranged apart from each other in the cylindrical axis direction of the lining material 1 whose longitudinal direction is the cylindrical axis direction, and The lining material 1 is disposed at the same position in the circumferential direction.

  According to this configuration, the ultrasonic wave receiving probe 20 is parallel to the cylindrical axis direction from the ultrasonic radiation position A1 where the ultrasonic wave transmitted from the ultrasonic wave transmitting probe 10 is incident on the lining material 1. When the measurement cross section S1 extending to the position includes an uncured portion, an echo waveform that is significantly different from the case where the uncured portion does not exist is detected. Thereby, the presence or absence of the uncured part in the lining material 1 can be confirmed reliably.

  Note that a blocking member can be installed so as to block between the ultrasonic transmission probe 10 and the ultrasonic reception probe 20 in the cylindrical axis direction of the lining material 1. Thereby, measurement noise can be reduced.

  Next, an experimental result of inspecting the cured state of the lining material by a method different from the above embodiment will be described. In this method, it is possible to confirm the presence or absence of an uncured portion in the lining material 1 by emitting ultrasonic waves from the outside of the lining material 1 and receiving the ultrasonic waves outside the lining material 1.

  FIG. 11 is a schematic diagram showing the arrangement positions of the ultrasonic transmission probe 10 and the ultrasonic reception probe 20 as viewed from the cylindrical axis direction of the lining material 1. The inspection was performed in a state where the sewer pipe 2 was not disposed outside the lining material 1.

  As shown in FIG. 11, the ultrasonic wave transmission probe 10 is installed so as to be able to transmit ultrasonic waves from the end surface facing the lining material 1. The ultrasonic transmission probe 10 is installed such that ultrasonic waves are transmitted toward a predetermined position A2 (hereinafter referred to as an ultrasonic radiation position A2) on the outer peripheral surface of the lining material 1. The ultrasonic transmission probe 10 is installed so that the direction in which the ultrasonic waves are transmitted is perpendicular to the cylindrical axis direction. Further, the ultrasonic transmission probe 10 is configured so that ultrasonic waves are transmitted toward the cylindrical central axis C when viewed from the cylindrical axis direction, that is, the cylinder of the lining material 1 at the ultrasonic radiation position A2. It is installed so that the tangential direction of the outer peripheral surface and the transmission direction of ultrasonic waves are orthogonal.

  Further, the ultrasonic wave receiving probe 20 is disposed at substantially the same position as the ultrasonic wave transmitting probe 10 in the cylindrical axis direction. The ultrasonic receiving probe 20 is installed with the end face capable of receiving ultrasonic waves directed toward the cylindrical central axis C of the lining material 1. Thereby, the ultrasonic wave which injects into the said end surface from the lining material 1 side can be received. The ultrasonic reception probe 20 receives at least ultrasonic waves that travel from the B2 position on the outer peripheral surface of the lining material 1 (hereinafter referred to as ultrasonic reception position B2) toward the ultrasonic reception probe 20. It is installed as possible. Note that the ultrasonic transmission probe 10 and the ultrasonic reception are set so that the ultrasonic reception position B2 is located about 90 ° in the circumferential direction from the ultrasonic radiation position A2 with the cylindrical central axis C as the center. A probe 20 is installed.

  In the present embodiment, it can be confirmed whether or not an uncured portion is included in a cross section (hereinafter referred to as measurement cross section S2) perpendicular to the cylindrical central axis C including the ultrasonic radiation position A2 in the lining material 1. . In addition, as shown below, the presence or absence of an unhardened part is confirmed by comparing with the measurement result when there is no uncured part in the measurement cross section S2.

  FIG. 12 is a diagram illustrating a waveform of an ultrasonic echo that the ultrasonic reception probe 20 receives from the ultrasonic transmission probe 10 when the portion indicated by X2 in FIG. 11 is uncured. . FIG. 13 is a diagram showing a waveform of ultrasonic echoes that the ultrasonic reception probe 20 receives from the ultrasonic transmission probe 10 when the lining material is completely cured at all positions. It is.

  12 and 13, the horizontal axis represents the ultrasonic wave propagation time (μs), and the vertical axis represents the amplitude voltage value (V) of the echo received by the ultrasonic wave receiving probe 20. The measurement result is obtained by transmitting an ultrasonic wave having a frequency of 200 kHz from the ultrasonic transmission probe 10.

  As shown in FIGS. 12 and 13, regardless of the presence or absence of an uncured portion, a waveform (first waveform W1) having substantially the same amplitude is measured in a region where the propagation time is 150 μs or less. Thereafter, the amplitude decreases, and when the propagation time passes about 300 μs, the amplitude increases. In particular, a waveform having a relatively large amplitude (second waveform W2) is measured in the region of 300 to 450 μs. When 450 μs elapses, the amplitude decreases, and when it exceeds 550 μs, a waveform having a relatively large amplitude (third waveform W3) is measured in the region of 550 to 750 μs.

  The amplitude of the third waveform W3 is greatly different between FIG. 12 and FIG. That is, when the uncured portion is included (FIG. 12), the amplitude of the third waveform W3 is smaller than when the uncured portion is not included (FIG. 13). Note that, after the third waveform W3, a plurality of waveforms that have passed through the paths I and II (inside the lining material 1) indicated by the two-dot chain line in FIG. Are big and the difference between them is not clear.

  Thus, when the measurement cross section S2 includes an uncured portion, the amplitude of the third waveform W3 is smaller than when the measurement cross section S2 does not include an uncured portion. Thereby, the presence or absence of the unhardened part in the said measurement cross section S2 can be confirmed.

  In addition, as shown in the above method, the ultrasonic wave transmission position B2 is ultrasonically transmitted so that the ultrasonic wave reception position B2 is located about 90 ° in the circumferential direction from the ultrasonic radiation position A2 with the cylindrical center axis C as the center. By installing the probe 10 for ultrasonic waves and the probe 20 for receiving ultrasonic waves, it becomes particularly easy to see the peak of the echo.

  In this experimental example, the case where ultrasonic waves are radiated from the outside of the lining material 1 has been described. Similarly, when ultrasonic waves are radiated from the inside of the lining material 1, the waves transmitted through the inside of the lining material 1 are Since there is no difference from the case of FIG. 11, when the measurement cross section S2 includes an uncured portion, the ultrasonic reception probe 20 receives the measurement cross section S2 as compared with the case where the measurement cross section S2 does not include an uncured portion. It can be inferred that the amplitude of the echo is reduced.

  That is, as shown in FIG. 14, the ultrasonic transmission probe 10 and the ultrasonic reception probe 20 are separated from each other in the circumferential direction of the lining material 1 on the inner circumference side of the lining material 1. Then, the lining material 1 is arranged so as to be in the same position in the cylindrical axis direction, and the ultrasonic wave from the ultrasonic wave transmitting probe 10 is detected by the ultrasonic wave receiving probe 20, whereby the uncured portion Can be confirmed. That is, it is confirmed whether or not an uncured portion is included in the cross section perpendicular to the cylindrical central axis C including the ultrasonic radiation position where the ultrasonic wave from the ultrasonic transmission probe 10 is emitted in the lining material 1. be able to. In this case, it is easy to continuously measure the cross section S2 of the lining material 1 in the longitudinal direction, and is particularly suitable when the lining material 1 is long.

Next, a method for rehabilitating a sewer pipe using the above-described cured state inspection method for the lining material will be described with reference to FIG.
First, the hose material 3 (uncured lining material) containing a thermosetting resin is drawn into the sewer pipe 2. In addition, the said air compressor 4, the boiler 5, the said air compressor 4 and the boiler 5 are connected on the ground, and the mixing apparatus 6 which can mix a vapor | steam and air is provided. Then, air and steam are supplied from the mixing device 6 into the hose material 3 through the hose 6a. Thereby, the hose material 3 is expanded and heated, and the hose material 3 is attached to the inner surface of the sewer pipe 2. Alternatively, a new pipe is formed. FIG. 15 shows a state where the hose material 3 is expanded. In addition, the hose 7a inserted into the hose material 3 from the end opposite to the end on the hose 6a side for supplying steam or the like in the hose material 3 is connected to the silencer and smoke suppressor 7 on the ground.

  As shown in FIG. 15, the inspection device 100 is inserted inside the hose material 3. The inspection apparatus 100 can move smoothly without damaging the inside of the ultrasonic transmission probe 10, the ultrasonic reception probe 20, and the hose material 3 in the inspection apparatus having the configuration described in FIG. The inspection apparatus main body provided with traveling means (not shown) such as rubber wheels is integrally formed. That is, in the inspection apparatus 100, the ultrasonic transmission probe 10 is arranged without contacting the inner surface of the hose material 3, and the ultrasonic wave is located at a position away from the ultrasonic transmission probe 10 in the cylindrical axis direction. The receiving probe 20 is arranged without contacting the inner surface of the hose material 3, and an ultrasonic echo transmitted from the ultrasonic transmitting probe 10 toward the hose material 3 is used as the ultrasonic receiving probe 20. Can be detected. The inspection apparatus main body is connected to the display device 8 provided on the ground by radio or wire. As a result, the inspection result of the cured state of the hose material 3 (echo waveform detected by the ultrasonic receiving probe 20 or the like) can be displayed on the display device 8.

  One end of a pair of wire ropes 101 and 101 extending toward both ends of the hose material 3 is connected to the inspection device 100. The other ends of the wire ropes 101 and 101 extend within the hose material 3 substantially in parallel with the cylindrical axis direction of the hose material 3 and extend outward from the end of the hose material 3 and are provided on the ground. It is connected to a traction device 9, 9 such as a winch. Therefore, by pulling and pulling out the wire rope 101 with the pulling device 9, the inspection device 100 can be moved in the cylindrical axis direction of the hose material 3.

  Thereby, while supplying the high temperature fluid which consists of air, a vapor | steam, etc. to the inner surface side of the hose material 3 and heating the said uncured said lining material, the test | inspection apparatus 100 is made to the cylinder axial direction of the hose material 3. The cured state of the hose material 3 can be inspected over the entire cylindrical axis direction of the hose material 3 by being moved. The inspection result can be confirmed with the display device 8 provided outside the hose material 3. Based on the inspection result of the cured state of the hose material 3 displayed on the display device 8, for example, when the hose material 3 is completely cured over the entire area, the operator compresses the air compressor 4, the boiler 5, and the mixing device 6. Etc. are controlled to stop the heating. In addition, based on the inspection result displayed on the display device 8, the air compressor 4, the boiler 5, the mixing device 6 and the like are controlled, and the temperature of the air and steam supplied into the hose material 3 and the air and steam are controlled. Heating conditions such as the supply amount may be adjusted.

  Thus, the method of rehabilitating the sewer pipe according to the present embodiment inserts the uncured hose material 3 that is cured by heating into the sewer pipe 2 and cures the hose material 3 to thereby sewer pipe. 2 is a method of covering the inner surface of the sewer pipe 2, and the inspection device 100 is used to inspect the cured state of the hose material 3, while air and steam as heating fluid are supplied to the hose material 3. The uncured hose material 3 is heated by supplying it to the inner surface side. And based on the test result of the hardening state of the hose material 3, the heating conditions of the hose material 3 are controlled.

  According to this structure, since the hose material 3 can be heated and cured while grasping the cured state of the hose material 3, the heating process can be terminated immediately after the hose material 3 is completely cured. it can. In addition, when an uncured portion is detected after a predetermined heating process for a predetermined time, additional heating can be performed so that the uncured portion does not remain. It is also possible to heat the hose material 3 under heating conditions suitable for the cured state of the hose material 3 that changes over time. Thereby, it becomes possible to perform efficiently the process of heat-hardening an uncured lining material.

  Note that the inspection apparatus 100 may be changed to the inspection apparatus having the configuration described in FIG. That is, the inspection apparatus 100 is located at a position where the ultrasonic transmitting probe 10 and the ultrasonic receiving probe 20 are separated in the circumferential direction of the lining material 1 on the inner peripheral side of the lining material 1, By arranging the lining material 1 so as to be in the same position in the cylindrical axis direction and detecting the ultrasonic wave from the ultrasonic wave transmitting probe 10 with the ultrasonic wave receiving probe 20, the presence or absence of an uncured portion is detected. The inspection apparatus may be changed to an inspection apparatus that can confirm the above.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made as long as they are described in the claims.

  For example, when the ultrasonic transmission probe 10 and the ultrasonic reception probe 20 are arranged on the same axis extending parallel to the longitudinal direction of the lining material 1 and measured in the longitudinal direction, or the lining material 1 It is not limited to the case where it arrange | positions so that it may become the same position in the cylindrical-axis direction, and it measures in the circumferential direction. For example, the measurement direction may be an oblique direction other than the longitudinal direction and the circumferential direction. Specifically, the ultrasonic transmission probe 10 and the ultrasonic reception probe 20 are arranged apart from each other in the cylinder axis direction of the lining material 1 formed in a cylindrical shape, and are different in the circumferential direction. It can also be configured to be arranged at a position (that is, a different position when viewed from the cylinder axis direction).

It is a figure which shows typically the sewer pipe with which the lining material was arrange | positioned inside. It is a schematic diagram which shows the state which installed the test | inspection apparatus used in order to implement this invention. It is the schematic diagram which looked at the measurement condition from the cylindrical axis direction of the lining material. FIG. 4 is a cross-sectional view taken along the line Y-Y ′ in FIG. 3. It is a figure which shows the waveform of the echo in the case of having an unhardened part. It is a figure which shows the waveform of the echo in the case of having hardened completely. It is a measurement result of the lining material heated at 70 degreeC for 4 hours. It is a measurement result when the lining material heated on the same conditions as the lining material shown in FIG. 7 is further heated at 80 degreeC for 1 hour. It is a measurement result when the lining material heated on the same conditions as the lining material shown in FIG. 7 is further heated at 80 degreeC for 4 hours. It is a measurement result of the lining material hardened completely. It is a schematic diagram which shows the arrangement position of the probe for ultrasonic transmission and the probe for ultrasonic reception seen from the cylindrical axial direction of the lining material. It is a figure which shows the waveform of the echo in case it has an unhardened part. It is a figure which shows the waveform of the echo in the case of having hardened completely. It is a schematic diagram which shows other embodiment. It is a schematic diagram for demonstrating the rehabilitation method of the sewer pipe which concerns on embodiment of this invention.

Explanation of symbols

1 Liner 2 Sewer pipe 3 Hose material (liner)
DESCRIPTION OF SYMBOLS 10 Ultrasonic transmission probe 20 Ultrasonic reception probe 100 Inspection apparatus

Claims (2)

A cured state inspection method for inspecting the cured state of a lining material including a curable resin disposed inside a sewer pipe,
An ultrasonic wave transmission probe capable of transmitting ultrasonic waves is disposed without contacting the lining material, and an ultrasonic wave reception probe capable of receiving ultrasonic waves is disposed on the ultrasonic wave transmission probe. Placed without touching the lining material at a position away from
The ultrasonic transmission probe and the ultrasonic reception probe are arranged apart from each other in the circumferential direction of the lining material formed in a cylindrical shape, and at the same position in the cylindrical axis direction of the lining material. Arranged,
Transmitting ultrasonic waves from the ultrasonic transmission probe toward the lining material, and receiving the echo transmitted through the inside of the lining material by the ultrasonic reception probe,
Estimating the cured state of the lining material based on the waveform of the echo received by the ultrasonic reception probe ,
The ultrasonic transmission probe and the ultrasonic reception probe are moved in the cylinder axis direction, and the cured state of the lining material is inspected in the cylinder axis direction . Curing state inspection method. In the method of rehabilitating the sewer pipe by inserting a lining material containing an uncured curable resin that is cured by heating into the sewer pipe, and curing the lining material,
By supplying a heating fluid to the inner surface side of the lining material, the uncured lining material is heated and cured,
While the lining material is being heated by the heating fluid, the cured state of the lining material is inspected using the cured state inspection method according to claim 1 ,
A method for rehabilitating a sewer pipe, wherein the heating condition of the lining material is controlled based on the inspection result of the cured state.

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