JP5705672B2 - Reconstruction promotion method and equipment for existing pipes - Google Patents

Description

  The present invention relates to a method for promoting the reconstruction of an existing pipe that replaces an existing pipe such as an aging sewer pipe with a new pipe without excavating it, and an apparatus for carrying out this method.

  Existing pipes such as sewer pipes may deteriorate due to secular change, or may deteriorate due to the effects of earthquakes or the ground, which may hinder continuous use. Such old or deteriorated existing pipes need to be replaced with new pipes in a timely manner.

  Conventionally, existing pipes have been renewed after excavating the ground surface and excavating existing pipes. Recently, a renovation promotion method that promotes an updated pipe while crushing an existing pipe buried in the ground without excavation has been widespread (see, for example, Patent Document 1).

Therefore, with reference to FIG. 11, a conventional reconstruction promotion method will be described.
In FIG. 11, reference numeral 12 indicates a manhole, and 100 indicates an existing pipe used as a sewer pipe.

In order to update the existing pipe 100 that has deteriorated, first, the start shaft 200 is excavated, and the propulsion unit 16 for propelling the update tube 120 is installed in the start shaft 200.
In this propulsion device 16, a cutter head 20 for crushing the existing pipe 100 is attached to the tip of the screw 22, and the existing pipe is crushed with a cutter of the cutter head 20, and fragments and earth and sand are started by the screw 22. Transferred to the counterattack 200.

  Simultaneously with the crushing of the existing pipe 100, the propulsion device 16 applies a propulsive force to the renewal pipe 120 and pushes the renewal pipe 120 by the length of the crushed existing pipe 100. By promoting the update pipe 120 while adding it, the existing pipe 100 can be replaced with the update pipe 120.

JP 2008-038485 A

  In conventional renovation propulsion methods, mechanical equipment such as propulsion equipment is concentrated in the start shaft, so the existing manhole is usually not large enough to install the propulsion equipment, and the manhole is removed. Then, it was necessary to build a start shaft there, or a new start shaft in the middle of the pipeline. In addition, since the mechanical equipment to be installed on the start shaft is complicated and large in size, the place where a large start shaft can be constructed is limited, and the construction is expensive.

  On the other hand, the arrival side uses the existing manhole 12, but such facilities are not installed in the space of the manhole 12 and are not used effectively.

  Therefore, an object of the present invention is to solve the problems of the prior art and to install mechanical equipment such as a propulsion device installed on the start side using an existing manhole, and to construct a reach shaft It is an object of the present invention to provide a method and an apparatus for promoting the rebuilding of an existing pipe that can be used to rebuild an existing pipe.

In order to achieve the above-mentioned object, the present invention is a modification of an existing pipe that simultaneously pushes the renewed pipe while crushing the existing pipe buried in the ground with a cutter head provided in a leading pipe preceding a new renewed pipe. In the propulsion method, a step of inserting a guide pipe extending from the start side manhole to the arrival side manhole into the existing pipe, positioning the guide pipe on a planned line serving as a reference for a propulsion path, and earth and sand in the arrival side manhole. A propulsion device that inserts a screw to be discharged into the pipe of the guide tube, generates a thrust force for propelling the renewal tube and the tip conduit, and a tip conduit that incorporates a cutter head and a drive device that simultaneously drives the screw; And assembling a propulsion device by connecting the screw to the leading conduit, and the existing pipe is connected to the cutter head. And crushing the earth and sand through the guide pipe by the screw and discharging the leading pipe and the renewal pipe by the propulsion device while discharging to the reaching manhole, and the existing pipe is bent When positioning the guide pipe in the existing pipe, the guide pipe is positioned on the planned line by fixing both ends of the guide pipe using support members respectively arranged on the start side manhole and the arrival side manhole. The guide tube is pulled by a tension cylinder provided in the support member of the start-side manhole or the arrival-side manhole, thereby keeping the guide tube in a tensioned state and filling a space between the existing tube and the guide tube It is characterized by filling the material .

The present invention also relates to a renovation propulsion apparatus for an existing pipe, wherein the existing pipe buried in the ground is crushed by a cutter head provided in a leading conduit preceding a new update pipe, and the update pipe is simultaneously propelled. And a propulsion device that generates thrust for propelling the leading pipe is disposed in the start side manhole, and the rear end portion of the guide tube that is fixed on the planned line serving as a reference for the propulsion path and extends to the arrival side manhole is connected to the cutter head. A screw for discharging the earth and sand excavated by the cutter head into the reaching side manhole in the pipe of the guide pipe, and a driving device for simultaneously driving the cutter head and the screw at the distal end of the leading conduit Place and
Support members for fixing the end portion of the guide tube and positioning the guide tube on the planned line are disposed in the start side manhole and the arrival side manhole, respectively, and the space between the existing tube and the guide tube is filled. A tension cylinder that keeps the guide tube in a tensioned state when the existing tube is bent when the material is filled is provided in the support member of the start side manhole or the arrival side manhole .

It is sectional drawing which shows one Embodiment of the reconstruction promotion apparatus by this invention. It is a top view of the propulsion apparatus installed in the start side manhole. It is the III-III arrow line view in FIG. It is sectional drawing which shows the structure of the tip conduit with which the reconstruction promotion apparatus by one Embodiment of this invention is provided. It is sectional drawing which shows the embedding condition of the existing pipe with the bending to which the reconstruction promotion construction method by this invention is applied. It is sectional drawing which shows the process of positioning a guide pipe | tube along a planned line in the existing pipe | tube. It is sectional drawing which shows the condition which started the promotion of a tip conduit. It is a longitudinal cross-sectional view which shows the soil removal effect | action in the cutter head of a front conduit | pipe. It is a cross-sectional view showing the soil removal action in the cutter head of the leading conduit. It is sectional drawing which shows the process of positioning a guide pipe | tube along a plan line in a straight existing pipe | tube. It is a longitudinal cross-sectional view which shows the structure of the conventional reconstruction promotion apparatus.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of an existing pipe remodeling promotion method and apparatus according to the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a diagram showing an overall configuration of a reconstruction promotion device according to the present embodiment. In FIG. 1, reference numeral 100 indicates an aged sewer pipe that is an existing pipe to be renovated. Reference numeral 120 indicates an update pipe to be replaced with the existing pipe 100. Reference numeral 10 is an existing manhole on the start side that is the starting point of the reconstruction method. Reference numeral 12 indicates an existing manhole on the reaching side.

  The remodeling propulsion apparatus according to the present embodiment is connected to the leading conduit 14, the propelling device 16 that generates the propelling force of the leading conduit 14, and connected to the tip of the leading conduit 14 and extends to the reaching side manhole 12 to guide the leading conduit 14. And a guide pipe 18 serving as a soil discharge path. The leading conduit 14 is connected to the tip of the update pipe 120, and the rear end of the update pipe 120 is connected to the propulsion device 16. A cutter head 20 is provided at the tip of the leading conduit 14. Inside the guide pipe 18, a screw 22 for transferring the earth and sand excavated by the cutter head 20 and fragments of the existing pipe 100 to the reaching side manhole 12 is inserted.

Next, the structure of each part which comprises the reconstruction promotion apparatus by this embodiment is demonstrated with reference to FIG. 2 thru | or FIG.
FIG. 2 is a top view of the propulsion device 16 installed in the start side manhole 10. 3 is a cross-sectional view taken along the line III-III in FIG.

  2 and 3, reference numeral 24 indicates a propulsion cylinder that generates a propulsive force. The propulsion cylinder 24 is disposed so as to accommodate the cylinder body in the existing pipe 102 (the existing pipe that is not the object of reconstruction) that communicates with the start-side manhole 10. In this case, a reaction force receiving plate 25 is fixed to the wall surface of the starting side manhole 10, and the main body portion of the propulsion cylinder 24 is supported by the reaction force receiving plate 25.

  The piston rod 26 of the propulsion cylinder 24 is connected to a propulsion plate 27 to which the end of the renewal pipe 120 is connected. As shown in FIG. 2, the propulsion plate 27 moves in the propulsion direction while guiding two guide rails 29 arranged in parallel via the cross beam 28, and transmits the propulsive force of the propulsion cylinder 24 to the update pipe 120. To do.

  The rear part of the guide rail 29 is fixed to the reaction force receiving plate 25, the front part is provided with a front jack 30, and four level jacks 32 are provided at the bottom part of the guide rails 29a and 29b. Is provided. The front jack 30 is a jack that adjusts the parallelism of the guide rail 29, and the level jack 32 is a jack that adjusts the level of the guide rail 29.

  Next, FIG. 4 is a diagram showing the configuration of the leading conduit 14 in detail. Inside the front conduit 14, a motor 35 and a speed reducer 36 are installed coaxially with the front conduit 14 as a drive mechanism for rotating the cutter head 20. The speed reducer 36 is fixed to the mounting frame 37.

  An output shaft 38 of the speed reducer 36 is connected to a rotating plate 41 constituting the cutter head 20 via a coupling 40. The end of the guide pipe 18 is connected to the earth and sand intake pipe 42, and the end of the earth and sand intake pipe 42 is connected to the bearing retainer 44 of the thrust bearing 43. The thrust bearing 43 receives a thrust load. The rotating plate 41 is rotatably supported by the output shaft 38. The output shaft 38 supports a thrust load and a radial load by a bearing (not shown) in the speed reducer 36.

  In the cutter head 20, the rotating plate 41, the drum member 47, and the face plate 45 have an integral structure, and constitute a blade edge portion. A plurality of cutters 46 are attached to the face plate 45.

  As shown in FIG. 9, the earth and sand intake pipe 42 is formed with a hopper portion 48 having a shape that is wide open in a U-shape for receiving earth and sand. On the other hand, on the inner peripheral surface of the drum member 47, a plurality of scrapers 50 for mixing the earth and sand are attached at predetermined intervals in the circumferential direction.

  As shown in FIG. 4, a screw 22 is accommodated in the guide tube 18. The screw 22 is formed by connecting a short screw shaft 52 as a unit, and a blade 53 is formed in the screw shaft 52 in a spiral shape. The end of the screw 22 is connected to the coupling 40, and the driving torque of the motor 35 is transmitted to the screw shaft 52 together with the cutter head 20.

  A swivel 54 is connected to the tip of the screw 22, and a water supply pipe 55 is connected to the swivel 54. A water supply passage 56 is formed in the screw shaft 52 in the axial direction. The water supply passage 56 extends to the cutter head 20 so that water is ejected from the water injection port 57 to the cutter head 22.

  The existing pipe reconstruction propulsion apparatus according to the present embodiment is configured as described above. Next, the existing pipe reconstruction promotion method will be described with reference to FIGS. 5 to 10.

  FIG. 5 is a diagram showing a state of burying existing pipes that are updated by implementing the reconstruction promotion method of the present invention. The existing pipe shown in FIG. 5 shows the existing pipe 100 bent in a wavy manner under the influence of an earthquake or a load from a vehicle passing through a road.

  First, as a preparatory process, an operation of inserting the guide pipe 18 into the existing pipe 100 is performed. In this embodiment, each guide pipe 18 is a short pipe that can be easily carried into the start side manhole 10. In the starting side manhole 10, the guide pipes 18 are added one by one by tightening the screws of the other guide pipes 18 to the starting side end portions of the guide pipes 18 placed in the existing pipe 100. .

  In this way, the work of adding the guide tube 18 in the starting side manhole 10 is continued, and the tip of the guide tube 18 is made to reach the reaching side manhole 12.

  Next, FIG. 6 is a diagram illustrating a process of aligning the guide tube 18 with the propulsion plan line 130. The planned line 130 is set at the approximate center of the existing pipe 100 that is bent. As shown in FIG. 6, in the reaching side manhole 12, the tip end of the guide tube 18 is supported by a support member 70 having a leg fixed to the reaching side end portion of the existing tube 100. On the other hand, in the start side manhole 10, a support frame 73 is connected to the start side end of the existing pipe 100, and a tension cylinder 72 that pulls the guide pipe 18 is installed in the support frame 73. When the guide tube 18 is pulled by the tension cylinder 72, the bent existing tube 100 is tightened in the longitudinal direction to be in a tension state, and the guide tube 18 can be positioned on the planned line 130.

After the guide tube 18 is positioned on the propulsion plan line 130 as described above, next, as shown in FIG. 6, the annular space between the guide tube 18 and the existing tube 100 is filled with a lightweight foamed mortar or the like. The material 132 is filled. In this case, a pipe 76 extending from a filler pump unit (not shown) installed on the ground is drawn into the reaching side manhole 12, and the nozzle pipe 77 is inserted from the support member 70 into the annular space between the guide pipe 18 and the existing pipe 100, This annular space is filled with a filler 132. When the filler 132 is solidified, the guide tube 18 is fixed in the existing tube 100 at a position where the planned line 130 and the tube axis coincide. Thereafter, in the start side manhole 10, the tension cylinder 72 and the frame 73 are disassembled and removed, and the support member 70 is also removed in the arrival side manhole 12.
Since the guide tube 18 is collected as the propulsion progresses, it is preferable to apply a filler adhesion preventing agent to the outer peripheral surface of the guide tube 18 in advance.

  Next, the equipment constituting the propulsion device 16 is carried into the starting manhole 10 and the propulsion device 16 is assembled as shown in FIG. In the propulsion device 16 according to the present embodiment, a guide rail 29 is installed on the bottom surface of the starting manhole 10, and the propulsion plate 27 is placed on the guide flail 29. The cylinder body of the propulsion cylinder 24 that generates the propulsive force is installed in the existing pipe 102 that is not the object of repair. Further, the screws 22 are inserted into the guide tube 18 while connecting the screws 22 one by one, and the screws 22 reach the reaching side manhole 12. The leading pipe 14 is connected to the propulsion plate 27 in a state where the propulsion plate 27 is retracted together with the piston rod 26 of the propulsion cylinder 24. Thereafter, the rear end portion of the screw 22 and the rear end portion of the guide tube 18 are connected to the cutter head 20 at the front end portion of the front conduit 14.

  At this time, in order to adjust the height and parallelism of the leading conduit 14 to the guide tube 18 that has already been installed, the jacks 30 and 32 are operated and adjusted.

  Thus, when the propulsion device 16 is ready, the propulsion process is started. At the start of propulsion, earth and sand are excavated while crushing the existing pipe 100 with the rotating cutter head 20, and the leading conduit 14 is pushed out by the propulsion cylinder 24. When the propulsion of the leading conduit 14 is finished, the rotation of the cutter head 20 is stopped.

  Thereafter, in the start side manhole 10, an operation of connecting one renewal pipe 100 to the rear end portion of the front conduit 14 is performed. In the arrival side manhole 12, the guide pipe 18 and the screw 22 protruding to the arrival side manhole 12 are removed along with the propulsion of the leading conduit 14.

  When the connection of the update pipe 100 to the leading conduit 14 is completed, the propulsion is resumed. Thereafter, every time one of the renewal pipes 100 is propelled, the renewal pipe 100 is added to the start side manhole 10 and the guide pipe 18 and the screw 42 are removed from the renewal side manhole 12.

  As shown in FIG. 1, in the process of propelling the update pipe 100 together with the leading conduit 14, the cutter head 20 and the screw 22 are rotated by the motor 35 and the speed reducer 36 arranged in the leading conduit 14. Driven. For this reason, it is not necessary to install the drive mechanism of the cutter head 20 in the propulsion device 16 installed in the start side manhole 10, and the configuration of the propulsion device 16 is greatly simplified. Can do. If the propulsion cylinder 24 that generates propulsive force is installed in the existing pipe 102, the propulsion device 16 can be installed using the existing manhole 10 without digging a start shaft as in this embodiment. Can be installed.

  Further, since the leading conduit 14 is connected to the guide tube 18 fixed on the planned line 130, the propulsion direction is restricted so as to propel only the direction in which the guide tube 18 extends. Therefore, unlike the conventional method, it is not necessary to measure the bend and correct the propulsion direction at any time, and the update pipe 120 can be accurately propelled straight along the planned line 130.

  Next, FIG. 8 and FIG. 9 are diagrams illustrating the action of soil removal at the cutter head 20. A sand intake pipe 42 having a U-shaped cross section is provided inside the blade portion of the front conduit 14, and a scraper plate 50 is attached to the drum member 47 between the rotary plate 41 and the face plate 45. ing. When the existing pipe 100 is crushed by the cutter 46 of the cutter head 20 and the earth and sand are excavated, fragments and earth and sand of the existing pipe 100 are taken into the drum member 47 at the blade edge as shown in FIG.

  The drum member 47 is rotated with the rotation of the cutter head 20, and debris and earth and sand are dammed up by the scraper 50 and moved upward. Then, the drum member 47 enters the earth and sand intake pipe 42 having the hopper portion 48 opened in a U shape. Will fall. A swivel 54 is attached to the tip of the screw 22, and a passage for flowing water extends to the cutter head 20 in the axial direction inside the screw shaft 52, and water is supplied from the outlet 57 to the cutter head 20. Erupted. Thus, during excavation, excavation efficiency can be improved by supplying water from the swivel 54 and pouring water into the cutter head 20.

  As shown in FIG. 8, the blade 53 of the screw 22 extends to the earth and sand intake pipe 42, and fragments and earth and sand taken into the earth and sand intake pipe 42 are contained in the guide pipe 18 as the screw 22 rotates. Are transferred to the reaching manhole 12. In the arrival-side manhole 12, the transferred soil is received by the tank 58, and when the soil is full, the tank 56 is transported to the ground. In this manner, the excavated debris and earth and sand can be efficiently discharged by effectively utilizing the space of the arrival side manhole 12.

  As described above, the existing pipe 100 can be updated to the update pipe 120 by propelling the leading pipe 14 and the update pipe 120 to the arrival side manhole 100.

  Although the above embodiment is a reconstruction promotion method when the existing pipe 100 is bent, the reconstruction promotion method of the present invention can be applied to the existing pipe 100 having no bending as shown in FIG. it can.

In FIG. 10, the plan line 130 is set at substantially the center of the straight existing pipe 100 without bending. Spacers 140 protruding in the radial direction are attached to the guide tube 18 in pairs, for example. Inside the existing pipe 100, the guide pipe 18 is supported by the spacer 140 so that the pipe axis coincides with the planned line 130.
In the start side manhole 10, the guide pipes 18 are connected one by one and inserted into the existing pipe 100 while the spacers 140 are attached.

  Thereafter, the equipment of the propulsion device 16 is carried into the start-side manhole 12, and after assembling, the leading conduit 14 and the update pipe 120 are promoted to the arrival-side manhole 100. Since this propulsion process is the same as the case where the existing pipe 100 is bent, description thereof is omitted.

  DESCRIPTION OF SYMBOLS 10 ... Start side manhole, 12 ... Arrival side manhole, 14 ... Lead pipe, 16 ... Propulsion device, 18 ... Guide pipe, 20 ... Cutter head, 22 ... Screw, 24 ... Propulsion cylinder, 27 ... Propulsion plate, 35 ... Motor, 36 ... Reducer, 47 ... Drum member, 45 ... Face plate, 53 ... Blade

Claims (7)

In the renovation promotion method for existing pipes, the existing pipes embedded in the ground are crushed with the cutter head provided in the leading pipe that precedes the new update pipes, and at the same time the above-mentioned update pipes are promoted.
Inserting a guide pipe extending from the starting side manhole to the arrival side manhole into the existing pipe, and positioning the guide pipe on a planned line serving as a reference of a propulsion path;
A propulsion device that inserts a screw for discharging earth and sand into the reaching side manhole into the pipe of the guide pipe and generates a thrust for propelling the renewal pipe and the leading pipe, and a drive for simultaneously driving the cutter head and the screw Carrying a leading conduit containing a device into the starting manhole, and connecting the screw to the leading conduit to assemble a propulsion device;
And crushing the existing pipe with a cutter head, transferring the earth and sand through the guide pipe by the screw and discharging the leading pipe and the update pipe by the propulsion unit while discharging the soil to the reaching manhole, and
When the guide pipe is positioned in an existing pipe that is bent, the guide pipe is fixed by fixing both ends of the guide pipe using support members respectively disposed on the start side manhole and the arrival side manhole. The pipe is positioned on the planned line, and the guide pipe is pulled by a tension cylinder provided in the support member of the start side manhole or the arrival side manhole, so that the guide pipe is kept in a tensioned state, and the existing pipe and the guide Filling the space between the tubes with filler,
This is a method for promoting the reconstruction of existing pipes.   When the existing pipe is a straight existing pipe, the guide pipe is supported by a spacer and is positioned on a planned line.   The propulsion cylinder for an existing pipe according to claim 1, wherein the propulsion cylinder of the propulsion device houses the cylinder body in an existing pipe that is not a target of the reconstruction that leads to the start-side manhole. In the renovation propulsion device for the existing pipe that simultaneously pushes the renewal pipe while crushing the existing pipe buried in the ground with the cutter head provided in the leading conduit preceding the new renewal pipe,
A propulsion device that generates thrust for propelling the renewal pipe and the leading pipe is disposed in the start-side manhole, and the rear end portion of the guide pipe that is fixed on a plan line serving as a reference for the propulsion path and extends to the arrival-side manhole is disposed in the cutter. Connected to the head,
A screw for discharging the earth and sand excavated by the cutter head into the reaching manhole is inserted into the guide pipe, and a driving device for simultaneously driving the cutter head and the screw is disposed at the tip of the tip conduit. ,
Support members for fixing the end portion of the guide tube and positioning the guide tube on the planned line are disposed in the start side manhole and the arrival side manhole, respectively, and the space between the existing tube and the guide tube is filled. Reconstructing an existing pipe, wherein a tension cylinder that keeps the guide pipe in a tensioned state when the existing pipe is bent when filling with a material is provided in the support member of the start side manhole or the arrival side manhole Propulsion device. The propulsion device comprises a propulsion device main body having a propulsion plate to which the end of the renewal pipe is connected and a guide rail for guiding the propulsion plate in the propulsion direction, and a propulsion cylinder is disposed in the starting side manhole. The reforming propulsion device for an existing pipe according to claim 4 , wherein The cutter head of the leading conduit includes a face plate to which a cutter is attached, a rotating plate connected to an output shaft of the driving device and rotatably supported by a thrust bearing, and a blade opening portion that connects the face plate and the rotating plate. And a soil intake pipe having a U-shaped hopper portion opened in the drum and connected to the end portion of the guide tube, and a plurality of agitating soils on the inner peripheral surface of the drum 5. A reforming propulsion device for an existing pipe according to claim 4 , wherein a scraper plate is attached. A water supply passage extending in the axial direction is formed in the screw shaft of the screw, a swivel connected to a water supply pipe is attached to the tip of the screw, and water is poured into the cutter head at the end of the screw shaft. The reforming propulsion device for an existing pipe according to claim 4 , wherein the outlet is opened.

Images