JP2017203738A - Rehabilitation method of existing pipe and connection port location measuring apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a construction method capable of accurately acquiring a location of a connection port of a branch pipe when rehabilitating an existing pipe with a rehabilitation pipe, and thus capable of preventing a drilling failure of the rehabilitation pipe.SOLUTION: A laser range finder 10 irradiates inside of an existing pipe 1 with a laser beam 13. A movable imaging apparatus 30 movable inside the existing pipe 1 takes an image inside the existing pipe 1 and a connection port 2a, in addition. A reflector 35 arranged in the movable imaging apparatus 30 reflects the laser beam 13 to the laser range finder 10, so that a distance to the movable imaging apparatus 30 taking an image of the connection port 2a from the laser range finder 10 can be measured, and then location information of the connection port 2a can be obtained.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for rehabilitating an existing pipe and an apparatus for measuring the position of a connection port with a branch pipe in the existing pipe.

  It is known to rehabilitate existing pipes such as aged sewer pipes by lining them with rehabilitation pipes (see Patent Document 1). Usually, branch pipes such as attachment pipes and inflow pipes are branched from existing pipes. The existing pipe is provided with a connection port with these branch pipes. Conventionally, after installing the rehabilitation pipe in the existing pipe, the communication port with the connection port is drilled in the rehabilitation pipe.

  For example, the upstream side of the construction target span is stopped with a packer to stop the flow of sewage, and a television camera is also inserted into the existing pipe together with the hole drilling machine. In the case of the reversal method and the forming method, a recess is formed in the portion of the rehabilitation pipe that covers the connection port.

Japanese Patent Laid-Open No. 4-66892

However, drilling defects were liable to occur for the following reasons.
(1) The operator mistakes the dent.
(2) Since the video image taken by the TV camera is an image from an oblique direction, it is difficult to see and the drilling position is likely to shift.
(3) Insufficient experience of operators In addition, the pipe making method cannot adopt the above method because it cannot make a dent.
In view of such circumstances, the present invention provides a construction method and apparatus that can accurately acquire the position of a connection port of a branch pipe when an existing pipe is rehabilitated with a rehabilitation pipe, and thus can prevent a defective hole in the rehabilitation pipe. With the goal.

In order to solve the above problems, the method of the present invention is a method of rehabilitating an existing pipe having a connection port to a branch pipe,
Irradiating the existing pipe with laser light from a laser distance meter;
A step of imaging the existing pipe and thus the connection port by means of a movable imaging device movable in the existing pipe;
The laser beam is reflected to the laser distance meter by a reflector provided on the mobile imaging device, thereby measuring the distance from the laser distance meter of the mobile imaging device imaging the connection port, and thus the connection port. An acquisition step of acquiring position information of
It is provided with.
According to the method of the present invention, the position information of the connection port can be acquired in advance before the inner wall of the existing pipe is covered with the renovated pipe. In addition, the connection port can be directly imaged by the mobile imaging device, and the position information of the connection port can be obtained accurately and easily by laser ranging. By determining the drilling position of the rehabilitated pipe based on this position information, it is possible to prevent a drilling defect.

It is preferable to form a communication port in the rehabilitation pipe based on the position information, and then install the rehabilitation pipe in the existing pipe.
In order to insert and install the rehabilitated pipe into the existing pipe, a drilling operation can be performed outside the existing pipe, so that a good communication port can be formed easily.

The device of the present invention is a connection port position measuring device for measuring the position of a connection port in an existing pipe,
A laser distance meter arranged to irradiate laser light into the existing pipe;
A mobile imaging device having imaging means and movable within the existing pipe;
A reflector that is provided in the mobile imager and reflects the laser light to the laser distance meter;
It is provided with.
According to the apparatus of the present invention, when rehabilitating an existing pipe, before the inner wall of the existing pipe is covered with the rehabilitated pipe, the position information of the connection port can be acquired in advance using the connection port position measuring device. it can. Moreover, it can be obtained accurately and easily by laser ranging. By determining the drilling position of the rehabilitated pipe based on this position information, it is possible to prevent a drilling defect.

The connection port position measuring device further includes a laser distance meter support means having a distance meter support portion for supporting the laser distance meter and capable of being disassembled and assembled, expanded or contracted, or foldable. Is preferred.
By disassembling, shrinking or folding the laser distance meter support means, the laser distance meter support means can be easily carried into a manhole or the like connected to the existing pipe. After carrying in, the laser distance meter support means can be assembled, extended or deployed in a manhole or the like and set. By supporting the laser distance meter with the laser distance meter support means, the laser distance meter can be stably installed inside a manhole or the like. As a result, laser ranging at the connection port can be performed stably and accurately.

It is preferable that the reflector is provided so as to be rotatable around an axis that intersects the advancing / retreating direction of the mobile imaging device. Furthermore, it is preferable that the connection port position measuring device includes a biasing unit that biases the reflector to a neutral position orthogonal to the advance / retreat direction.
When the reflector comes into contact with any obstacle, the reflector can fall over and pass through the obstacle. After passing, the reflector can be returned to the original neutral position by the biasing means.

  According to the present invention, it is possible to accurately acquire the position of the connection port of the branch pipe, and as a result, it is possible to prevent a defective hole in the renovated pipe.

FIG. 1 is a front sectional view showing a state of a process of acquiring connection port position information using a connection port position measuring device in the existing pipe rehabilitation method according to the first embodiment of the present invention. FIG. 2 is a perspective view of a mount (laser distance meter support means) of the connection port position measuring apparatus. FIG. 3 is an exploded perspective view of the gantry. FIG. 4 is a front view showing a state in which the moving imager of the connection port position measuring device is arranged at a drilling position of an existing pipe. FIG. 5 is a side view taken along line VV in FIG. Fig.6 (a) is a top view of the renovated pipe before installation by the inversion method to the existing pipe. FIG. 6B is a front view of the rehabilitation pipe. FIG. 6C is a perspective view of the rehabilitation tube. Fig.7 (a) is a top view which shows the peripheral part of the communicating port of the said renovated pipe in the sealed state. FIG.7 (b) is sectional drawing which follows the VIIb-VIIb line | wire of Fig.7 (a). FIG. 8 is a front sectional view showing the existing pipe in which the rehabilitation pipe is installed by the reversal method in a state where the communication port is not sealed. Fig.9 (a) is front sectional drawing which expands and shows the sealing part of the communicating port of FIG. FIG.9 (b) is front sectional drawing which shows the state in the middle of canceling | releasing sealing of the said communicating port. FIG.9 (c) is front sectional drawing which shows the state after sealing cancellation | release. FIG. 10 is a perspective view showing a modification of the laser distance meter support means. FIG. 11 is a cross-sectional view showing a modification of the laser distance meter support means in a state where the laser distance meter support means is installed at the communication portion between the manhole and the existing pipe. FIG. 12 is a side view of the laser distance meter support means taken along line XII-XII in FIG. FIG. 13 is a side view showing a modification of the method of using the laser distance meter support means of FIG. FIG. 14 shows another embodiment, and FIG. 14 (a) is a plan view showing the communication port of the rehabilitation pipe in a sealed state. FIG. 14B is a front sectional view showing the existing pipe in which the rehabilitation pipe of FIG. 14A is installed by the forming method along the line XIVb-XIVb of FIG. FIG.14 (c) is front sectional drawing which shows the state in the middle of canceling | releasing sealing of a communicating port. FIG.14 (c) is front sectional drawing which shows the state after sealing cancellation | release. FIG. 15 is a cross-sectional view showing another embodiment of a rehabilitation pipe installed on an existing pipe by a forming method. FIG. 16: is front sectional drawing which shows other embodiment and is shown in the state in the middle of renovating an existing pipe | tube by a pipe manufacturing method. FIG. 17 is a plan view showing the rehabilitation pipe of the embodiment of FIG. 16 in a state where a drilling position display jig is provided. FIG. 18 is a cross-sectional view showing a state in which the rehabilitation pipe of the embodiment of FIG. 16 is drilled. FIG. 19 is a cross-sectional view showing the rehabilitation pipe of the embodiment of FIG. 16 in a state where a sealing device is provided inside after the drilling. FIG. 20A is a cross-sectional view of the existing pipe when the renovated pipe is formed, along the line XX-XX in FIG. FIG. 20B is a cross-sectional view of a state where the connection port is then sealed with a sealing device. FIG. 21 is a plan view of a rehabilitated pipe, showing a modification of the embodiment by the pipe making method. 22 is a cross-sectional view of the rehabilitation tube of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 9 show a first embodiment of the present invention. As shown in FIG. 1, the existing pipe 1 to be rehabilitated in this embodiment is an underground sewer pipe. Manholes 3 and 3B are connected to both ends of the existing pipe 1. A connection port 2a (attachment tube port) is provided in the middle of the existing tube 1, and a branch tube 2 (attachment tube) is connected thereto. As shown in FIG. 8, the existing pipe 1 is renewed by lining the renovated pipe 4 on the inner wall of the existing pipe 1. In this embodiment, it is assumed that a reversal method is employed as the lining method.

  As shown in FIG. 1, when the existing pipe 1 is rehabilitated, the connection port position measuring device 5 is installed in the existing pipe 1 and the manhole 3. The connection port position measuring device 5 includes a laser distance meter 10, a gantry 20 (laser distance meter support means), and a moving imager 30.

A laser distance meter 10 is disposed in the manhole 3. The laser distance meter 10 irradiates the laser beam 13, receives the reflected light, and measures the distance from the reflection point. The optical axis of the laser beam 13 is directed from the manhole 3 to the existing pipe 1 to be rehabilitated. Preferably, the laser distance meter 10 is disposed on an extension line of the central axis of the existing tube 1, and the optical axis of the laser beam 13 is along the central axis of the existing tube 1. Further, the laser distance meter 10 is arranged so that the back surface is in contact with the inner wall of the manhole 3 opposite to the existing pipe 1 to be rehabilitated. When another existing pipe 1A is opened in the inner wall, it is arranged so that the back surface faces in the opening 1e.
The intersection of the inner wall (or opening 1e) on the opposite side of the manhole 3 and the extension line of the central axis of the rehabilitation target existing pipe 1 is set as the laser ranging reference position P0.

The laser distance meter 10 and the processing control means 8 including a ground personal computer are connected by a wired cable (not shown).
Note that the processing control means 8 and the laser distance meter 10 may be capable of wireless communication.

As shown in FIG. 1, a gantry 20 is installed in the manhole 3. The laser rangefinder 10 is supported by the gantry 20.
As shown in FIG. 2, the gantry 20 includes a gantry body 21 and a plurality of (here, four) leg portions 22. The gantry body 21 has an annular plate shape. The outer diameter of the gantry body 21 is substantially equal to the inner diameter at the bottom part to the middle part of the manhole 3 (FIG. 1). As shown in FIG. 3, the gantry body 21 is divided into a plurality of (here, four) divided bodies 21a in the circumferential direction. Each divided body 21 has an arc-shaped plate shape. Adjacent divided bodies 21 a are connected to each other via a connecting piece 24, and are assembled in an annular shape. The leg part 22 can be extended and contracted. An upper end portion of the leg portion 22 is connected to the gantry body 21. A suspended pillar-shaped distance meter support portion 23 is suspended from one divided body 21a. As shown in FIG. 2, a clamp member 25 is detachably attached to the distance meter support portion 23. The laser distance meter 10 is provided on the clamp member 25.

The components 21 to 24 of the gantry 20 are connected to each other by screw fastening or the like, so that they can be disassembled and assembled.
When the gantry 20 is accommodated in the manhole 3, the gantry 20 can be easily disassembled by disassembling the gantry 20. The gantry 20 can be assembled inside the manhole 3. When the gantry body 21 is in contact with the inner peripheral surface of the manhole 3 over substantially the entire circumference, the gantry 20 and thus the laser distance meter 10 can be stabilized. By extending and contracting each leg portion 22, the level of the gantry body 21 can be adjusted, and the height of the laser distance meter 10 can be adjusted.

As shown in FIG. 1, a moving imaging device 30 is arranged in the existing pipe 1. As shown in FIGS. 4 and 5, the mobile imaging device 30 includes an image expansion camera 31 (imaging means), a traveling body 32, and a reflector 35. The image development camera 31 has a super-wide-angle lens (detailed illustration is omitted) and can capture almost the entire circumference (omnidirectional) in the existing pipe 1 at a time. The imaging signal is sent to the processing control means 8 (FIG. 1) in real time and developed into a panoramic image on the screen of the monitor 8m. The processing control means 8 and the mobile imaging device 30 are connected by a wired cable (not shown).
Note that the processing control unit 8 and the mobile imaging device 30 may be capable of wireless communication.

As shown in FIG. 4, the image development camera 31 is mounted on the traveling body 32.
The traveling body 32 has a self-running function. As a result, the mobile imaging device 30 can run by self-running. The movement of the mobile imaging device 30 can be remotely operated by the processing control means 8.
Note that the mobile imaging device 30 may be capable of traveling by towing or the like without being self-propelled.

  A camera support arm 33 extends from the front portion (right side in FIG. 4) of the traveling body 32. The camera support arm 33 can be lifted back and forth (rotated) around an axis along the vehicle width direction (the direction orthogonal to the plane of FIG. 4) with respect to the traveling body 32. An image expansion camera 31 is provided at the tip of the camera support arm 33. The camera support arm 33 includes two links 33 a and 33 b and forms a parallel link in cooperation with the image development camera 31 and the traveling body 32. Regardless of the elevation angle of the camera support arm 33, the image development camera 31 is always directed forward (a certain direction).

  As shown in FIGS. 4 and 5, a reflector 35 is provided at the rear part (left side in FIG. 4) of the traveling body 32. The reflector 35 has a substantially semicircular plate shape. The size (radius) of the reflector 35 is preferably within the existing pipe 1 and as large as possible. The material of the reflector 35 is, for example, resin, and polyvinyl chloride is preferable from the viewpoint of ease of processing, weight reduction, and the like. The color of the reflector 35 is preferably white from the viewpoint of easy visibility of the laser beam 13. It is preferable that the surface of the reflector 35 be as smooth as possible, and it is preferable that warp is not generated as much as possible.

As shown by a solid line in FIG. 4, the reflector 35 is erected vertically so as to be orthogonal to the advancing / retreating direction of the mobile imaging device 30. Moreover, the reflector 35 can tilt back and forth and can automatically return to a vertical neutral position. Specifically, the linear lower end portion of the reflector 35 is coupled to the traveling body 32 so as to be rotatable about an axis along the vehicle width direction (an axis that intersects the advancing / retreating direction of the mobile imaging device 30). An urging means 36 is provided at the rotary connecting portion of the reflector 35. The urging means 36 urges the reflector 35 to be vertical (neutral position). The biasing means 36 includes a forward tilting action spring 36a and a backward tilting action spring 36b. When the reflector 35 is in the forward tilt posture (two-dot chain line in FIG. 4), the forward tilting action spring 36a urges the reflector 35 to wake up toward the vertical neutral position. When the reflector 35 is in the backward-tilting posture (three-dot chain line in FIG. 4), the backward tilting action spring 36b urges the reflector 35 to wake up toward the vertical neutral position.
Therefore, even if the reflector 35 comes into contact with any obstacle in the existing pipe 1, the reflector 35 can fall through the obstacle and return to the original vertical posture after passing.
The action springs 36a and 36b are constituted by torsion coil springs, but may be constituted by leaf springs or the like.

A method for using the connection port position measuring device 5 and a method for rehabilitating the existing pipe 1 will be described.
<Connection port location information acquisition process>
As shown in FIG. 1, the moving image pickup device 30 is accommodated in the existing pipe 1 so that the reflector 35 of the moving image pickup device 30 faces the laser distance meter 10. The moving image pickup device 30 is run (moved) along the tube axis of the existing tube 1. And the inside of the existing pipe | tube 1 is imaged with the image expansion | deployment camera 31. FIG. The imaging screen is confirmed on the monitor 8m of the processing control means 8. And if the connection port 2a is imaged, the moving image pick-up machine 30 will be stopped in the position. Preferably, the mobile imaging device 30 is stopped so that the image development camera 31 is located directly below the connection port 2a (the same position in the tube axis direction of the existing tube 1). Since the connection port 2a at this time is not covered with the rehabilitation pipe 4, it can be easily and clearly confirmed from the imaging screen.

In parallel, the distance L2 from the laser distance meter 10 to the reflector 35 is measured by irradiating the moving image pickup device 30 with the laser beam 13 from the laser distance meter 10 and reflecting it on the reflector 35. The measurement data of the distance L2 is sent to the process control means 8. Further, the processing control means 8 adds up the length L1 of the laser distance meter 10, the measurement distance L2, and the distance L3 from the reflector 35 to the image development camera 31. The values of the distances L1 and L3 are stored in the processing control unit 8 in advance. Accordingly, the distance L0 (= L1 + L2 + L3) from the reference position P0 to the image development camera 31 can be calculated. As a result, the separation distance L0 (position information of the connection port 2a) from the reference position P0 to the connection port 2a can be acquired.
Since it is laser ranging, accurate position information of the connection port 2a can be acquired in a short time. A complicated apparatus configuration is unnecessary, and construction costs can be reduced.

More preferably, as shown in FIGS. 4 and 5, the connection angles φ _2a and θ _2a of the connection port _2a are also acquired from the image taken by the image development camera 31. As shown in FIG. 4, the tube axis direction connection angle φ _2a is an angle of the connection port 2a along the tube axis direction of the existing tube 1, and more specifically, the central axis Lc of the attachment tube 2 at the connection port 2a 1 shows an inclination angle with respect to the vertical when projected in the width direction 1 (on the paper surface of FIG. 4). As shown in FIG. 5, the circumferential connection angle θ _2a is an angle of the connection port 2a along the circumferential direction of the existing tube 1, and more specifically, the central axis Lc of the attachment tube 2 in the connection port 2a is The inclination angle with respect to the vertical when projected in the tube axis direction (on the paper surface of FIG. 5) is shown. It is preferable that a scale indicating the position (angle) in the tube axis direction and the circumferential direction of the existing tube 1 is displayed on the image taken by the image development camera 31.

<Marking line formation process>
Next, as shown in FIG. 6, a marked line 42 is provided on the outer peripheral surface (inverted inner peripheral surface) of the rehabilitated tube 4. The marked line 42 serves as an index of the correspondence between each position on the rehabilitated pipe 4 and each position on the existing pipe 1, and includes a straight marked line 42a and a circumferential marked line 42b.

  The straight marked line 42a is arranged at a plurality of predetermined positions in the circumferential direction of the rehabilitation pipe 4 (for example, the top (0 °) and the positions of 5 °, 30 °, 60 °, etc. on both sides), respectively. It forms along a straight line. The straight marked line 42a may be formed only in the upper half portion of the rehabilitation pipe 4.

  The circumferential marking line 42b has a plurality of predetermined positions in the pipe axis direction on both sides of the rehabilitated pipe 4 (for example, positions corresponding to the end openings of the existing pipe 1 (0 cm) and the outside thereof such as 1 cm, 3 cm, 5 cm, Position) along the circumferential direction. The circumferential marking line 42b may be formed in a semicircular shape only in the upper half portion of the rehabilitation pipe 4. It is preferable to attach a character notation indicating a position such as “0”, “1 cm”, “3 cm”, and “5 cm” to each circumferential marking line 42 b.

<Drilling process of communication port 4a>
Next, as shown in FIG. 6, the communication port 4 a is drilled at a location corresponding to the position information of the connection port 2 a in the rehabilitation pipe 4. When deciding the drilling position, it is considered that the rehabilitation pipe 4 is reversed when installed on the existing pipe 1. For example, along the tube axis direction of the rehabilitated tube 4, a position away from the circumferential standard line 42 b of “0 cm” on the tip side of the reverse insertion (right side in FIG. 6A) by the distance L4 is defined as a drilling location. . As shown in FIG. 1, the distance L4 corresponds to the distance from the end of the existing pipe 1 on the laser distance meter 10 side (left side in FIG. 1) to the connection port 2a, and the inner diameter of the manhole 3 from the reference distance L0. It can be calculated by subtracting.
Further, based on the angle information φ _2a and θ _2a of the connection port 2a, the drilling angle of the communication port 4a is determined with reference to the straight marked line 42a at the top (0 °) of the rehabilitation pipe 4. Furthermore, when the rehabilitation pipe 4 expands and contracts due to hardening during installation on the existing pipe 1, the drilling position, hole diameter, and the like are determined in consideration of the expansion / contraction rate.
Since the drilling operation can be performed outside the existing pipe 1 before the rehabilitation pipe 4 is installed in the existing pipe 1, the communication port 4a can be easily and cleanly formed.

<Sealing process>
Next, as shown in FIGS. 7A and 7B, the communication port 4 a is sealed by the sealing member 43. The sealing member 43 is made of, for example, an annular rubber sheet. This sealing member 43 is put on the outer periphery of the location where the communication port 4a in the rehabilitation pipe 4 is provided. And the sealing member 43 and the rehabilitation pipe | tube 4 are joined by joining means, such as a double-sided adhesive tape 46. FIG. Furthermore, the float 44 is anchored to the sealing member 43 via the anchor string 45.
In FIG. 7A, the marked line 42 is not shown.

<Installation process of rehabilitation pipe 4>
This rehabilitation pipe 4 is installed on the inner wall of the existing pipe 1 by a reversal method. That is, the rehabilitation pipe 4 is turned over and inserted into the existing pipe 1. For example, fluid pressure such as air pressure or water pressure can be used as the insertion force. At this time, by sealing the communication port 4a with the sealing member 43, the fluid pressure can be prevented from leaking from the communication port 4a.
At the time of insertion, it is checked whether or not the rehabilitation pipe 4 is twisted or rotated mainly by the straight marked line 42a. Furthermore, the position in the axial direction of the rehabilitation pipe 4 with respect to the existing pipe 1 is confirmed by the circumferential mark line 42b. Thereby, the rehabilitation pipe | tube 4 can be installed in the position and angle as designed with respect to the existing pipe | tube 1. FIG. As a result, as shown in FIG. 8, the communication port 4a can be accurately aligned with the connection port 2a.
Furthermore, after reversal insertion of the rehabilitation pipe 4, the rehabilitation pipe 4 may be hardened with a heating fluid. By sealing the communication port 4a with the sealing member 43, the heating fluid can be prevented from leaking from the communication port 4a.

<Removal process of sealing member 43>
As shown in FIGS. 8 and 9A, the sealing member 43 is positioned inside the rehabilitation pipe 4 by the reversal of the rehabilitation pipe 4. Further, the float 44 reaches the inside of the manhole 3B on the downstream side (right side in FIG. 8) of the existing pipe 1 by the water flow in the rehabilitation pipe 4. As shown in FIG. 9B, by pulling the float 44, the double-sided adhesive tape 46 can be peeled off and the sealing member 43 can be removed. As a result, as shown in FIG. 9C, the inside of the rehabilitation pipe 4 can be connected to the inside of the attachment pipe 2 via the communication port 4a and the connection port 2a.

  Thus, the existing pipe 1 can be rehabilitated by lining the rehabilitation pipe 4 on the inner wall of the existing pipe 1. By forming the communication port 4a before the rehabilitation pipe 4 is installed in the existing pipe 1, the search for the connection port 2a and the drilling work of the communication port 4a after the installation of the rehabilitation pipe 4 are unnecessary. Therefore, it is possible to improve the construction quality without erroneously drilling the communication port 4a after the rehabilitation pipe 4 is installed. Moreover, the construction can be simplified and the construction period can be shortened. Furthermore, the mechanical equipment can be simplified and the construction cost can be reduced.

Next, another embodiment of the present invention will be described. In the following embodiments, the same reference numerals are attached to the drawings for the same configurations as those already described, and the description thereof is omitted.
FIG. 10 shows a modification of the laser distance meter support means. The gantry 50 (laser distance meter support means) includes a beam 51 and a pair of legs 52 and 52. The leg portion 52 includes a vertical member 52a and an inclined member 52b, and has an inverted V shape. A beam 51 is stretched horizontally between the pair of leg portions 52, 52. A suspension column-shaped distance meter support portion 53 is suspended from the middle portion of the beam 51. The laser distance meter 10 is supported at the lower end portion of the distance meter support portion 53.
The gantry 50 may be foldable and unfoldable, or may be disassembled and assembled.

  11 and 12 show another modification of the laser distance meter support means. As shown in FIG. 11, the telescopic laser distance meter support means 60 is disposed in the opening 1e to the manhole 3 in the existing pipe 1A opposite to the existing pipe 1 to be rehabilitated with the manhole 3 in between.

  The laser distance meter support means 60 includes a telescopic rod 61 and a support arm 62 (distance meter support portion). The telescopic rod 61 extends linearly and can be adjusted in length. The longitudinal direction of the telescopic rod 61 is oriented vertically (1 radial direction of the existing pipe 1). As shown in FIG. 12, a fixing screw 64 is provided at an intermediate portion of the telescopic rod 61. By loosening the fixing screw 64, the telescopic rod 61 can be expanded and contracted, and by tightening the fixing screw 64, the length of the telescopic rod 61 can be fixed.

  As shown in FIG. 11, the telescopic rod 61 is provided with a support arm 62. The support arm 62 extends horizontally so as to be orthogonal to the telescopic rod 61 and protrudes into the manhole 3. The laser rangefinder 10 is supported at the tip of the support arm 62.

Abutting members 63 are provided at both ends of the telescopic rod 61. The abutting member 63 has an abutting portion 63a and a locking portion 63b, and has an L-shaped cross section. The abutting portion 63a is abutted against the inner peripheral surface of the existing pipe 1A. As shown in FIG. 12, the abutting portion 63a is curved in an arc shape along the circumferential direction of the existing pipe 1A. As shown in FIG. 11, the locking portion 63 b is addressed and locked to the end surface of the existing pipe 1 </ b> A.
Since the laser distance meter support means 60 is more compact than the gantry 20 (FIG. 3), it can be easily put in and out of the manhole 3.

  As shown in FIG. 13, when the sewage is flowing through the existing pipes 1 and 1A and the manhole 3, the telescopic rod 61 may be directed horizontally. Accordingly, sewage can pass through the opening 1e below the telescopic rod 61, and the laser distance meter support means 60 can be prevented from receiving the sewage fluid pressure. As a result, the laser distance meter 10 can be arranged more stably.

In the embodiment of FIG. 14, the rehabilitation pipe 4 </ b> B is installed in the existing pipe 1 by a forming method. As shown to Fig.14 (a), the marked line 42 is provided in the outer peripheral surface of the renovated pipe 4B.
Similarly to the first embodiment, after forming the communication port 4a at a predetermined location of the rehabilitating pipe 4B based on the position information of the connection port 2a, the communication port 4a is sealed by the sealing member 43B. The sealing member 43B has a circular shape with a slightly larger diameter than the communication port 4a. The outer peripheral part of the sealing member 43B is addressed to and joined to the outer peripheral surface around the communication port 4a in the rehabilitation pipe 4B. An easily breakable portion 43e such as a cut groove is formed in an annular shape at the boundary between the portion covering the communication port 4a in the sealing member 43B and the outer peripheral portion.

As shown in FIG. 14B, a connecting portion 43c is provided on the surface of the sealing member 43B facing the inside of the rehabilitating tube 4B. The float 44 is connected to the connecting portion 43 c via the tether 45.
As shown in FIG. 14C, after the rehabilitation pipe 4B is installed on the inner wall of the existing pipe 1 by a forming method, the float 44 is pulled. Then, the easy-to-break portion 43e is broken, so that the portion covering the communication port 4a in the sealing member 43B can be separated from the outer peripheral portion and removed. Thereby, as shown in FIG.14 (d), the inside of the renovation pipe | tube 4B can be connected with the inside of the attachment pipe | tube 2 via the communication port 4a and the connection port 2a.

FIG. 15 shows another form of the rehabilitation pipe 4C installed in the existing pipe 1 by the forming method. The rehabilitating pipe 4C before being installed on the existing pipe 1 has a smaller outer cross-sectional area because the one side portion 4e in the circumferential direction is recessed inside. Preferably, the installation angle of the rehabilitating pipe 4C to the existing pipe 1 is set so that the recessed portion 4e of the rehabilitating pipe 4C faces sideways and the communication port 4a is disposed on the relatively flat upper part 4f.
Although illustration is omitted, the rehabilitation pipe 4C is inserted into the existing pipe 1 and both ends thereof are protruded and fixed into the manhole 3, and then heated to the shape memory temperature with steam or the like. As a result, the rehabilitation pipe 4C is expanded in diameter and becomes cylindrical.

In the embodiment of FIGS. 16 to 20, the rehabilitated pipe 4 </ b> D is installed in the existing pipe 1 by a pipe making method.
As shown in FIG. 16, the pipe making work of the rehabilitation pipe 4 </ b> D is performed in the manhole 3. Adjacent edges are joined together while spirally winding the belt-shaped rehabilitation material 4x.
The tow rope 47 is connected to the tip of the rehabilitated pipe 4D, and the rehabilitated pipe 4D is sequentially drawn into the existing pipe 1 by the amount produced.

More preferably, a traction sheet 49 is laid on the inner peripheral bottom surface of the existing pipe 1. The rehabilitation pipe 4D is placed thereon, and the tow sheet 49 is pulled together with the tow rope 47. The upper surface of the traction sheet 49 has a high frictional resistance with the rehabilitation pipe 4 </ b> D, and the lower surface of the traction sheet 49 has a low frictional resistance with the existing pipe 1. Thereby, the rehabilitation pipe 4D can be pulled into the existing pipe 1 with a light force.
The upper surface of the traction sheet 49 may be made of, for example, a rubber material, or may be roughened.
The lower surface of the traction sheet 49 may be made of, for example, a silicon-based material, or may be coated with a lubricant.

A tape measure 48 is attached to the top of the outer peripheral surface of the rehabilitation pipe 4D along the pipe axis. Affixing uses a double-sided tape or the like. With the tape measure 48, the pipe making length of the rehabilitated pipe 4D (or the amount drawn into the existing pipe 1) can be determined.
In addition, instead of or in addition to the tape measure 48, a mark line 42 (FIG. 6) similar to that of the first embodiment is provided at a predetermined angular position or a predetermined axial position on the outer peripheral surface of the rehabilitation pipe 4D. Also good.

As indicated by a two-dot chain line in FIG. 16, a distance L5 from the distal end in the insertion direction of the rehabilitation pipe 4D in the installed state to the connection port 2a is calculated from the position information of the connection port 2a.
Then, as shown in the solid line of FIG. 16 and FIG. 17, when the length from the tip of the rehabilitating pipe 4D being pipe-made becomes the distance L5 or more, the drilling position display jig 74 is located at the position of the distance L5. Is provided. As shown in FIG. 17, the drilling position display jig 74 is made of a resin such as polyvinyl chloride, and has a cross shape, for example.

Next, as shown in FIG. 18, a drilling device 70 is assembled in the manhole 3. The hole drilling device 70 includes a frame 71 that can be disassembled and assembled, a tube pressing portion 72, and a hole drilling portion 73.
The rehabilitation pipe 4D is fixed to the manhole 3 by the pipe presser 72. After removing the drilling position display jig 74 from the rehabilitating pipe 4D, the part where the drilling position display jig 74 is located is drilled by the drilling part 73 to form the communication port 4a.

Next, as shown in FIG. 19, the sealing device 80 is installed inside the rehabilitation pipe 4D. The sealing device 80 includes a column 81, a pedestal 82, and a sealing member 83. The support column 81 is extendable and can be bent or tilted. A pedestal 82 is provided at the upper end of the column 81. A sealing member 83 is provided on the upper base portion 82 a of the pedestal 82. The sealing member 83 has an annular container shape, and can be expanded and contracted vertically by introducing fluid pressure such as air pressure or water pressure into the inside.
The expansion and contraction operation of the support column 81 and the expansion and contraction operation of the sealing member 83 can be performed by remote operation in the manhole 3 or on the ground.

  As shown in FIG. 19, the support column 81 of the sealing device 80 is erected directly below the communication port 4a. And the length of the support | pillar 81 is adjusted, and the peripheral part of the upper base part 82a is closely_contact | adhered to the peripheral part of the communication port 4a in the internal peripheral surface of the renovated pipe 4D. Further, the sealing member 83 is fitted into the communication port 4a in a contracted state. Thereby, it is possible to avoid the sealing member 83 from hitting the inner wall or the like of the existing pipe 1 when the rehabilitation pipe 4D is drawn.

When pipe making is completed by installing the rehabilitation pipe 4D over the entire area of the existing pipe 1 (see the two-dot chain line in FIG. 16), the communication port 4a matches the connection port 2a as shown in FIG.
Next, as shown in FIG. 20B, the sealing member 83 is expanded upward. The sealing member 83 enters the connection port 2a and is in close contact with the inner peripheral surface of the attachment tube 2 over the entire circumference. Thus, the gap 1g between the inner peripheral surface of the existing pipe 1 and the outer peripheral surface of the rehabilitated pipe 4D is blocked from the inside of the attachment pipe 2 and the inside of the rehabilitated pipe 4D.

  Then, a backfill material (not shown) is filled in the gap 1g. At this time, the sealing member 83 can prevent the backfill material from entering the attachment tube 2 or the rehabilitation tube 4D.

  After filling and curing the backfill material, the sealing member 83 is contracted by remote operation and removed from the mounting tube 2, and the column 81 is contracted, bent, or tilted to Fit in the rehabilitation tube 4D. Then, the sealing device 80 is removed from the rehabilitation pipe 4D. A rope may be attached to the sealing device 80 in advance, and the sealing device 80 may be removed by drawing the rope toward the manhole 3 or 3B. The sealing device 80 may be equipped with a self-running function and removed by self-running.

  FIG.21 and FIG.22 shows the deformation | transformation aspect of the straight marked line in embodiment (FIGS. 16-20) of a pipe manufacturing method. In this embodiment, a thin resin tube 42C is used as a substitute for the straight marked line 42a (see FIG. 6A). The tube 42C is disposed at a predetermined angular position on the outer peripheral surface of the rehabilitating tube 4D and extends along the axis of the rehabilitating tube 4D. Preferably, the tube 42C is provided in the upper half circumference portion (for example, 45 ° on both sides of the top (0 °)) of the rehabilitation tube 4D.

  Although detailed illustration is omitted, an adhesive, a double-sided tape, or the like is used as means for joining the tube 42C to the rehabilitation pipe 4D. Further, a clip 41 is provided on the outer peripheral surface of the rehabilitation pipe 4D. A tube 42 </ b> C is locked to the clip 41. Thereby, even when the tube 42C is caught by an obstacle when the rehabilitated tube 4D is inserted into the existing tube 1 (not shown in FIGS. 21 to 22), the clip 41 can prevent the displacement of the tube 42C.

  The tube 42C may be solidified by filling the inside of the tube 42C with a grout material after the completion of the production of the rehabilitated tube 4D (after completion of the installation in the existing tube 1). By doing so, it is possible to prevent the rehabilitation pipe 4D from being lifted when filling the backfilling material thereafter.

The present invention is not limited to the embodiment described above, and various modifications can be made without departing from the spirit of the invention.
For example, the position information of the connection port 2a may be measured (acquired) using a distance measuring device (for example, a tape measure) other than the laser distance meter 10. The position information of the connection port 2a may be indexed (acquired) based on survey data at the time of new installation.
The position information of the connection port 2a is acquired, then the rehabilitation pipe 4 is installed in the existing pipe 1, and then the communication port 4a is drilled at a predetermined location of the rehabilitation pipe 4 based on the position information of the connection port 2a. May be.
The existing pipe 1 is not limited to a sewer pipe, and may be an agricultural water pipe or the like.
The branch pipe from the existing pipe 1 is not limited to the attachment pipe 2 but may be an inflow pipe or the like.

  The present invention is applicable to, for example, rehabilitation construction of existing pipes.

1 Existing pipe 2 Mounting pipe (branch pipe)
2a Connection port 4, 4B, 4C, 4D Rehabilitation pipe 4a Communication port 5 Connection port position measuring device 10 Laser distance meter 13 Laser light 20 Mounting base (laser distance meter support means)
23 Distance meter support unit 30 Moving image pickup device 31 Image development camera (image pickup means)
35 reflector 36 urging means 50 mount (laser distance meter support means)
53 Distance Meter Support Unit 60 Telescopic Laser Distance Meter Support Means 62 Support Arm (Distance Meter Support Unit)

Claims (5)

A method of rehabilitating an existing pipe having a connection port to a branch pipe,
Irradiating the existing pipe with laser light from a laser distance meter;
A step of imaging the existing pipe and thus the connection port by means of a movable imaging device movable in the existing pipe;
The laser beam is reflected to the laser distance meter by a reflector provided on the mobile imaging device, thereby measuring the distance from the laser distance meter of the mobile imaging device imaging the connection port, and thus the connection port. An acquisition step of acquiring position information of
A method for rehabilitating an existing pipe, characterized by comprising:   The rehabilitation method according to claim 1, wherein a communication port is formed in the rehabilitation pipe based on the position information, and then the rehabilitation pipe is installed in the existing pipe. A connection port position measuring device for measuring the position of a connection port in an existing pipe,
A laser distance meter arranged to irradiate laser light into the existing pipe;
A mobile imaging device having imaging means and movable within the existing pipe;
A reflector that is provided in the mobile imager and reflects the laser light to the laser distance meter;
A connection port position measuring device comprising:   4. The laser distance meter support means having a distance meter support part for supporting the laser distance meter, further comprising a laser distance meter support means that can be disassembled and / or expanded or retracted or foldable. Connection port position measuring device. The reflector is provided so as to be rotatable around an axis that intersects the advancing and retreating direction of the mobile imaging device;
5. The connection port position measuring device according to claim 3, further comprising biasing means for biasing the reflector to a neutral position orthogonal to the advancing / retreating direction.

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