JP2007120730A - Reconstruction method of buried pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reconstruction method of a buried pipe allowing the use of a mounting pipe heretofore in use as it is after replacing an existing pipe with a new pipe. <P>SOLUTION: In the reconstruction method of the buried pipe for replacing the existing pipe 10 buried underground, with the new pipe 20 by jacking a boring machine, the mounting pipe 12 for connecting the existing pipe 10 to a catch basin 11 is cut in a predetermined position A outside an excavated tunnel T formed by the boring machine before jacking the boring machine. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a buried pipe reconstructing method in which a new pipe is installed while an existing pipe such as a sewer pipe is torn down with an excavator.

  There is known a non-cutting method in which an excavating machine is driven, an existing sewer pipe is demolished, and a new sewer pipe is installed. When the excavator tears down the sewer pipe, the installation pipe connecting the sewer pipe and the drainage basin such as a residential land is also partially demolished.

Therefore, before propelling the excavator, the attachment pipe may be reinforced by lining the inner surface of the attachment pipe from the drainage pipe or sewer pipe. When the attachment pipe is reinforced, the attachment pipe does not completely collapse even if the excavator interferes with the attachment pipe, and the attachment pipe may be used as it is (see, for example, Patent Document 1). .
JP 2000-257141 A

  However, since the material used for the lining is formed of resin, when the excavator and the attachment pipe interfere with each other, the end portion of the attachment pipe, that is, the end near the existing pipe is deformed. When the deformation of the mounting pipe is large, the allowable flow rate of sewage is reduced, which causes clogging. Moreover, connection to a sewer pipe becomes difficult. Therefore, even if the inner surface of the mounting tube is lined, it may be necessary to install a new mounting tube.

  The present invention has been made in view of the above circumstances, and the purpose of the present invention is to bury a mounting pipe that has been used until then, after replacing an existing pipe with a new pipe. It is to provide a method for reconstructing a tube.

  In order to solve the above problems and achieve the object, the buried pipe reconstructing method of the present invention is configured as follows.

(1) In a method for reconstructing a buried pipe that replaces an existing pipe buried in the ground by propelling the excavator, the installation for connecting the existing pipe and the drainage pipe before propelling the excavator A structural discontinuity is formed in the pipe at an arbitrary position outside the excavation tunnel formed by the excavator.

(2) In the buried pipe reconstructing method described in (1), the discontinuous part is a groove part formed on the inner surface of the attachment pipe.

(3) In the buried pipe reconstructing method described in (2), the groove part completely divides the attachment pipe.

(4) In the buried pipe reconstructing method described in (2), the groove is formed by construction from the drainage basin.

(5) In the buried pipe reconstructing method described in (2), the groove is formed by construction from the inside of the existing pipe.

(6) In the method for reconstructing a buried pipe described in (1), the discontinuous portion is formed by forming a reinforcing member on the inner surface of the mounting pipe so as to extend from the arbitrary position toward the drainage basin. Form.

(7) In the buried pipe restructuring method described in (6), the reinforcing member is formed by lining the inner surface of the mounting pipe.

(8) In the buried pipe reconstructing method described in (6), the reinforcing member is formed by construction from the drainage basin.

(9) In the method for reconstructing a buried pipe described in (6), the reinforcing member is formed by construction from the existing pipe.

(10) In the method for reconstructing a buried pipe that replaces an existing pipe buried in the ground by propelling the excavator, the installation for connecting the existing pipe and the drainage pipe before propelling the excavator The pipe is cut at an arbitrary position outside the excavation tunnel formed by the excavator.

(11) In a method for reconstructing a buried pipe that replaces an existing pipe buried in the ground by propelling the excavator, the attachment for connecting the existing pipe and the drainage pipe before propelling the excavator A reinforcing member for reinforcing the attachment pipe is formed on the inner surface of the pipe so as to extend from an arbitrary position outside the excavation tunnel formed by the excavator toward the drainage basin.

(12) In a method of reconstructing a buried pipe that replaces an existing pipe buried in the ground by propelling the excavator, the installation for connecting the existing pipe and the drainage pipe before propelling the excavator A step is formed over a predetermined section of the attachment pipe at an arbitrary position outside the excavation tunnel formed by the excavator in the pipe.

(13) In a method for reconstructing a buried pipe that replaces an existing pipe buried in the ground by propelling the excavator, the installation for connecting the existing pipe and the drainage pipe before propelling the excavator A pipe is removed over the existing pipe from an arbitrary position outside the excavation tunnel formed by the excavator.

  According to the present invention, after replacing an existing pipe with a new pipe, the mounting pipe that has been used can be used as it is.

Hereinafter, the first to fourth embodiments will be described in detail with reference to the drawings. .
(First embodiment)
FIG. 1 is a process diagram showing the main steps of the buried pipe reconstructing method according to the first embodiment of the present invention.

  The buried pipe restructuring method in the present invention replaces an existing sewer pipe (hereinafter, existing pipe) 10 with a new sewer pipe (hereinafter, new pipe) 20 by the promotion of the excavator. The type of the excavator is not particularly limited, and is appropriately selected depending on the diameter of the new pipe 20 and the nature of the ground. The existing pipe 10 is connected with a ceramic pipe mounting pipe 12 that guides sewage from a drainage basin 11 provided in a user facility such as a residential land to the existing pipe 10.

  First, as shown in FIG. 1A, the hose of the water jet R1 is introduced from the drainage basin 11 to the attachment pipe 12, and the predetermined position A of the attachment pipe 12 is cut by the water pressure sprayed from the tip nozzle of the hose. . The predetermined position A of the attachment pipe 12 corresponds to an arbitrary position in the present invention, and is determined at a position that does not interfere with the excavating machine propelling in the ground, that is, outside the excavation tunnel T formed by the excavating machine.

Furthermore, the predetermined position A of the attachment pipe 12 will be described in detail with reference to FIG.
FIG. 2 is a schematic view showing the relationship between the cut portion of the attachment pipe 12 and the excavation tunnel T according to the embodiment.
In FIG. 2, when the distance between the predetermined position A of the mounting pipe 12 and the axis L of the excavation tunnel T is D1, and the radius of the excavation tunnel T is D2, the predetermined position A of the mounting pipe 12 has a relationship of D2 <D1. It is determined to satisfy.

  In addition, in this embodiment, although the attachment pipe 12 is cut | disconnected by the construction from the drainage pipe 11, this invention is not limited to this, You may cut | disconnect by the construction from the existing pipe 10. FIG. If construction is performed from the drainage basin 11, accurate work by an operator who does not rely on a robot or the like is possible. Moreover, if it is construction from the existing pipe 10, since excavation of a natural ground becomes unnecessary, the traffic regulation on the ground becomes unnecessary.

  Then, when the predetermined position A of the mounting pipe 12 is completely cut by the water jet R1, propulsion by the excavator is started, and the existing pipe 10 is cut and crushed as shown in FIG. New pipes 20 are installed one after the other.

  In the present embodiment, the existing pipe 10 is cut and crushed and broken, but the present invention is not limited to this, and for example, the existing pipe 10 may be crushed by expanding the diameter from the inside. In the present embodiment, the new pipe 20 is the same as the existing pipe 10 or has a larger diameter than the new pipe 10.

  As propulsion by the excavator proceeds, the attachment pipe 12 connected to the existing pipe 10 is crushed by the excavator. However, in this embodiment, since the predetermined position A of the mounting pipe 12 is cut before the propulsion by the excavator is started, the excavation is performed on the portion closer to the drainage basin 11 than the cutting position A of the mounting pipe 12. Power from the machine does not reach. Therefore, the portion of the attachment pipe 12 closer to the drainage basin 11 than the cutting position A is not damaged at all, and the cross-sectional shape is maintained in a clean circular shape.

  When the new pipe 20 is installed in the planned area, the new pipe 20 and the attachment pipe 12 are connected by an appropriate technique, and the connection work between the new pipe 20 and the attachment pipe 12 is completed.

(Operation by this embodiment)
According to the buried pipe reconstructing method in the present embodiment, the predetermined position A in the attachment pipe 12 that does not interfere with the excavator is cut before the excavator starts propulsion. Therefore, even if the mounting pipe 12 is partially cut and crushed along with the propulsion of the excavator, the influence does not reach the drainage basin 11 side from the cutting position A of the mounting pipe 12. The portion of the drainage basin 11 side from the cutting position A is not damaged at all. As a result, the attachment pipe 12 can be reused, and it is not necessary to attach a new attachment pipe 12 separately, so that the cost and labor required for the construction are drastically reduced. Further, even when the diameter of the new pipe 20 is larger than that of the existing pipe 10 as in the present embodiment, the influence by the propulsion of the excavator does not reach the drainage basin 11 side from the cutting position A of the mounting pipe 12.

  In the present embodiment, the stress concentration is generated at the predetermined position A by forming the annular groove 40 at the predetermined position A on the inner surface of the attachment tube 12, but the present invention is not limited to this. Instead, stress concentration may be generated at the predetermined position A by attaching a ring-shaped member to the predetermined position A on the inner surface of the attachment tube 12, for example.

  In the present embodiment, a ceramic pipe is used as the attachment pipe 12, but the present invention is not limited to this, and may be, for example, a vinyl chloride pipe or a reinforced concrete pipe.

(Second Embodiment)
FIG. 3 is a process diagram showing the main steps of the buried pipe reconstructing method according to the second embodiment of the present invention, and FIG. 4 is a diagram showing the reinforcing member 15 and the excavation tunnel T formed on the mounting pipe 12 according to the embodiment. It is the schematic which shows these relationships.

  First, as shown in FIG. 3A, the lining material 15 a is introduced so as to reach the predetermined position A of the attachment pipe 12 from the drainage tub 11. The lining material 15a contains a liquid resin having a property of being cured by heating.

  Next, the balloon of the pressurizing device R2 is introduced from the drainage basin 11 to the inside of the lining material 15a. The balloon introduced into the inner side of the lining material 13a is inflated by the hot air from the pressurizing device R2, and pressurizes the lining material 15a against the inner surface of the mounting tube 12. Thereby, the lining material 15a introduced into the attachment pipe 12 is cured by being heated and pressurized by the balloon so as to extend from the predetermined position A of the attachment pipe 12 toward the drainage basin 11 on the inner surface of the attachment pipe 12. In addition, the reinforcing member 15 is formed. The predetermined position A of the mounting tube 12 is equivalent to the predetermined position A of the mounting tube 12 in the first embodiment, as shown in FIG.

  In the present embodiment, heating with warm air is used to cure the lining material 15a, but the present invention is not limited to this, and for example, a method that naturally cures over time is used. May be.

  Moreover, in this embodiment, although lining is given by construction from the drainage basin 11, this invention is not limited to this, and lining may be given by construction from the existing pipe 10. If construction is performed from the drainage basin 11, accurate work by an operator who does not rely on a robot or the like is possible. Moreover, if it is construction from the existing pipe 10, since excavation of a natural ground becomes unnecessary, the traffic regulation on the ground becomes unnecessary.

  Then, when the reinforcing member 15 is formed on the inner surface of the mounting pipe 12, propulsion by the excavator is started, and while cutting and crushing the existing pipe 10, as shown in FIG. And a new pipe 20 is installed.

  In the present embodiment, the existing pipe 10 is cut and crushed and broken, but the present invention is not limited to this, and for example, the existing pipe 10 may be crushed by expanding the diameter from the inside. In the present embodiment, the new pipe 20 is the same as the existing pipe 10 or has a larger diameter than the new pipe 10.

  As propulsion by the excavator proceeds, the attachment pipe 12 connected to the existing pipe 10 is crushed by the excavator. However, in this embodiment, the reinforcing member 15 is formed so as to extend from the predetermined position A of the mounting pipe 12 toward the drainage basin 11 with respect to the inner surface of the mounting pipe 12 before the propulsion by the excavator is started. Has been. Therefore, when the excavator is propelled, the attachment pipe 12 is cut at a predetermined position A having a difference in strength due to the influence of the excavator. As a result, since the force from the excavator does not reach the portion of the attachment pipe 12 on the drainage basin 11 side, the portion on the drainage basin 11 side from the cutting position A of the attachment pipe 12 is not damaged at all, and the cross-sectional shape Is maintained in a clean circle.

  When the new pipe 20 is installed in the planned area, the new pipe 20 and the attachment pipe 12 are connected by an appropriate technique, and the connection work between the new pipe 20 and the attachment pipe 12 is completed.

(Operation by this embodiment)
According to the method for reconstructing a buried pipe according to the present embodiment, the reinforcement member extends so as to extend from the predetermined position A toward the drainage basin 11 with respect to the inner surface of the attachment pipe 12 before the propulsion by the excavator is started. 15 is formed. Therefore, even if the mounting pipe 12 is cut and crushed by the propulsion of the excavator, the drainage basin 11 side from the predetermined position A of the mounting pipe 12 is reinforced by the reinforcing member 15, so that it is almost damaged. Absent. As a result, the attachment pipe 12 can be reused, and it is not necessary to attach a new attachment pipe 12 separately, so that the cost and labor required for the construction are drastically reduced. Further, even when the diameter of the new pipe 20 is larger than that of the existing pipe 10 as in the present embodiment, the influence by the propulsion of the excavator does not reach the drainage basin 11 side from the cutting position A of the mounting pipe 12.

(Third embodiment)
FIG. 5 is a process chart showing the main steps of the buried pipe reconstructing method according to the third embodiment of the present invention, and FIG. It is the schematic which shows a relationship.
First, as shown in FIG. 5A, the hose of the water jet R1 is introduced from the drainage basin 11 to the attachment pipe 12, and is annularly formed at a predetermined position A on the inner surface of the attachment pipe 12 by the water pressure sprayed from the tip nozzle of the hose. The groove portion 40 is formed. The predetermined position A of the attachment tube 12 is equivalent to the predetermined position A of the attachment tube 12 in the first embodiment, as shown in FIG.

  In this embodiment, the groove portion 40 is formed in the attachment pipe 12 by construction from the drainage basin 11, but the present invention is not limited to this, and the groove portion 40 is formed by construction from the existing pipe 10. May be. If construction is performed from the drainage basin 11, accurate work by an operator who does not rely on a robot or the like is possible. Moreover, if it is construction from the existing pipe 10, since excavation of a natural ground becomes unnecessary, the traffic regulation on the ground becomes unnecessary.

  Then, when the annular groove 40 is formed at the predetermined position A on the inner surface of the mounting pipe 12 by the water jet R1, the propulsion by the excavator is started, and the existing pipe 10 is cut and crushed as shown in FIG. Thus, the new pipes 20 are installed one after another behind the excavator.

  In the present embodiment, the existing pipe 10 is cut and crushed and broken, but the present invention is not limited to this, and for example, the existing pipe 10 may be crushed by expanding the diameter from the inside. In the present embodiment, the new pipe 20 is the same as the existing pipe 10 or has a larger diameter than the new pipe 10.

  As propulsion by the excavator proceeds, the attachment pipe 12 connected to the existing pipe 10 is crushed by the excavator. However, in the present embodiment, the annular groove 40 is formed at a predetermined position A on the inner surface of the attachment pipe 12 before the propulsion by the excavator is started. Therefore, when force is applied to the attachment pipe 12 by the propulsion of the excavator, the attachment pipe 12 is cut at the groove 40 due to stress concentration. As a result, since the force from the excavator does not reach the portion of the attachment pipe 12 on the drainage basin 11 side, the portion on the drainage basin 11 side from the cutting position A of the attachment pipe 12 is not damaged at all, and the cross-sectional shape Is maintained in a clean circle.

  When the new pipe 20 is installed in the planned area, the new pipe 20 and the attachment pipe 12 are connected by an appropriate technique, and the connection work between the new pipe 20 and the attachment pipe 12 is completed.

(Operation by this embodiment)
According to the buried pipe reconstructing method of the present embodiment, the annular groove 40 is formed at a predetermined position A on the inner surface of the mounting pipe 12 before the propulsion by the excavator is started. For this reason, even if the mounting pipe 12 is cut and crushed by the propulsion of the excavator, the mounting pipe 12 is cut at the predetermined position A due to the stress concentration acting on the groove portion 40. The 11 side is hardly damaged. As a result, the attachment pipe 12 can be reused, and it is not necessary to attach a new attachment pipe 12 separately, so that the cost and labor required for the construction are drastically reduced. Further, even when the diameter of the new pipe 20 is larger than that of the existing pipe 10 as in the present embodiment, the influence by the propulsion of the excavator does not reach the drainage basin 11 side from the cutting position A of the mounting pipe 12.

(Fourth embodiment)
FIG. 7 is a process diagram showing the main steps of the buried pipe reconstructing method according to the fourth embodiment of the present invention, and FIG. 8 shows the relationship between the crushing portion of the mounting pipe 12 and the excavation tunnel T according to the same embodiment. FIG.
First, as shown in FIG. 7A, the crushing robot R3 is introduced into the existing pipe 10, and the crushing head of the crushing robot R3 moves the attachment pipe 12 from the joint with the existing pipe 10 to a predetermined position A of the attachment pipe 12. Until it is crushed. The predetermined position A of the attachment tube 12 is equivalent to the predetermined position A of the attachment tube 12 in the first embodiment, as shown in FIG.

  In addition, in this embodiment, although the attachment pipe 12 is crushed by construction from the drainage basin 11, the present invention is not limited to this, and may be crushed by construction from the existing pipe 10. If it is construction from the drainage basin 11, an accurate work by an operator is possible. In addition, if the existing pipe 10 is crushed, ground excavation is not necessary, and ground traffic regulation is unnecessary.

  Then, when the mounting pipe 12 is completely crushed from the joint portion with the existing pipe 10 to the predetermined position A of the mounting pipe 12 by the crushing robot R3, propulsion by the excavator is started, and the existing pipe 10 is cut and crushed. As shown in FIG. 7B, new pipes 20 are installed one after another behind the excavator.

  In the present embodiment, the existing pipe 10 is cut and crushed and broken, but the present invention is not limited to this, and for example, the existing pipe 10 may be crushed by expanding the diameter from the inside. In the present embodiment, the new pipe 20 is the same as the existing pipe 10 or has a larger diameter than the new pipe 10.

  As the excavator advances, the excavator passes near the mounting tube 12. However, in this embodiment, before the propulsion by the excavator is started, the attachment pipe 12 is crushed from the joint portion with the existing pipe 10 to the predetermined position A. It doesn't work. Therefore, the portion of the attachment pipe 12 closer to the drainage basin 11 than the cutting position A is not damaged at all, and the cross-sectional shape is maintained in a clean circular shape.

  When the new pipe 20 is installed in the planned area, the new pipe 20 and the attachment pipe 12 are connected by an appropriate technique, and the connection work between the new pipe 20 and the attachment pipe 12 is completed.

(Operation by this embodiment)
According to the method for reconstructing a buried pipe according to the present embodiment, the attachment pipe 12 is crushed from a joint portion with the existing pipe 10 to a predetermined position A before propulsion by the excavator is started. Therefore, even if the excavator passes near the attachment pipe 12, the attachment pipe 12 is hardly damaged. As a result, the attachment pipe 12 can be reused, and it is not necessary to attach a new attachment pipe 12 separately, so that the cost and labor required for the construction are drastically reduced. Further, even when the diameter of the new pipe 20 is larger than that of the existing pipe 10 as in the present embodiment, the attachment pipe 12 is not affected by the propulsion of the excavator.

  The present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Moreover, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.

Process drawing which shows the main processes of the reconstruction method of the buried pipe which concerns on the 1st Embodiment of this invention. Schematic which shows the relationship between the cutting part of the attachment pipe which concerns on the same embodiment, and an excavation tunnel. Process drawing which shows the main processes of the reconstruction method of the buried pipe which concerns on the 2nd Embodiment of this invention. Schematic which shows the relationship between the reinforcement member and excavation tunnel which are formed in the attachment pipe which concerns on the same embodiment. Process drawing which shows the main processes of the reconstruction method of the buried pipe which concerns on the 3rd Embodiment of this invention. Schematic which shows the relationship between the groove part and excavation tunnel which are formed in the attachment pipe which concerns on the same embodiment. Process drawing which shows the main processes of the reconstruction method of the buried pipe which concerns on the 4th Embodiment of this invention. Schematic which shows the relationship between the crushing part of the attachment pipe which concerns on the same embodiment, and an excavation tunnel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Existing pipe, 11 ... Drainage pipe, 12 ... Mounting pipe, 15 ... Reinforcement member, 20 ... New installation pipe, A ... Predetermined position (arbitrary position), T ... Excavation tunnel.

Claims (5)

In the method of reconstructing buried pipes that replace the existing pipes buried in the ground by driving the excavator,
Before propelling the excavator,
A structural discontinuity is formed at an arbitrary position outside the excavation tunnel formed by the excavator in the attachment pipe connecting the existing pipe and the drainage pipe. Construction method. In the method of reconstructing buried pipes that replace the existing pipes buried in the ground by driving the excavator,
Before propelling the excavator,
A method for reconstructing a buried pipe, wherein an attachment pipe connecting the existing pipe and a drainage basin is cut at an arbitrary position outside a drilling tunnel formed by the excavator. In the method of reconstructing buried pipes that replace the existing pipes buried in the ground by driving the excavator,
Before propelling the excavator,
A reinforcing member that reinforces the attachment pipe on the inner surface of the attachment pipe that connects the existing pipe and the drainage pipe so as to extend from the arbitrary position outside the excavation tunnel formed by the excavator toward the drainage pipe. A method for reconstructing a buried pipe characterized by forming the buried pipe. In the method of reconstructing buried pipes that replace the existing pipes buried in the ground by driving the excavator,
Before propelling the excavator,
A step is formed over a predetermined section of the attachment pipe at an arbitrary position outside the excavation tunnel formed by the excavator in the attachment pipe connecting the existing pipe and the drainage basin. How to reconstruct buried pipes. In the method of reconstructing buried pipes that replace the existing pipes buried in the ground by driving the excavator,
Before propelling the excavator,
A method for reconstructing a buried pipe, wherein an attachment pipe that connects the existing pipe and a drainage basin is removed from an arbitrary position outside the excavation tunnel formed by the excavator over the existing pipe. .

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