JP4355699B2 - Reconstruction method of buried pipe - Google Patents

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.

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

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) By crushing an existing pipe buried in the ground and connected to a drainage basin by driving an excavator and installing a new pipe in an excavation tunnel formed behind the excavator, In the method of reconstructing a buried pipe that replaces the existing pipe with the new pipe and connects the new pipe and the drainage basin provided outside the excavation tunnel, the existing pipe is disposed before propelling the excavator. A reinforcing member for reinforcing the mounting pipe is formed on the inner surface of the mounting pipe that connects the drainage pipe and the drainage pipe so as to extend from an arbitrary position outside the excavation tunnel toward the drainage pipe. To do.

  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 third technical examples and one embodiment will be described in detail with reference to the drawings .
( First technical example )
FIG. 1 is a process diagram showing main steps of a buried pipe restructuring method according to a first technical example .

The buried pipe restructuring method in the present technology example replaces an existing sewer pipe (hereinafter, existing pipe) 10 with a new sewer pipe (hereinafter, new pipe) 20 by propulsion 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 mounting pipe 12, and the predetermined position A of the mounting 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 same technical example .
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 the present technology example , the attachment pipe 12 is cut by construction from the drainage basin 11, but the present technology is not limited to this, and may be cut 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 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 technology example , the existing pipe 10 is cut and crushed to be demolished. However, the present invention is not limited to this. For example, the existing pipe 10 may be crushed by expanding the diameter from the inside. In the present technology example , 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 attachment 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 attachment 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 technology example )
According to the buried pipe reconstructing method in the present technology example, 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 technology example, 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 this technology example , the annular groove portion 40 is formed at the predetermined position A on the inner surface of the attachment tube 12 to generate stress concentration at the predetermined position A. However, the present technology is 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 technology example , a ceramic tube is used as the attachment tube 12, but the present technology is not limited to this, and may be, for example, a vinyl chloride tube or a reinforced concrete tube.

(Kazumi facilities form)
Figure 3 is a process diagram illustrating the main steps of buried pipe reconstruction method of according to Kazumi facilities embodiment of the present invention, FIG. 4 is the reinforcing member 15 and drilling the tunnel T is formed in the mounting tube 12 according to the embodiment It is the schematic which shows a relationship.

  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 technical example , 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. For this reason, 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.

( Second technical example )
FIG. 5 is a process diagram showing the main steps of the buried pipe restructuring method according to the second technical example , and FIG. 6 shows the relationship between the groove 40 formed in the mounting pipe 12 and the excavation tunnel T according to the technical example . FIG.
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 mounting tube 12 is equivalent to the predetermined position A of the mounting tube 12 in the first technical example , as shown in FIG.

In the present technology example , the groove portion 40 is formed in the attachment pipe 12 by construction from the drainage basin 11, but the present technology 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 technology example , the existing pipe 10 is cut and crushed to be demolished. However, the present invention is not limited to this. For example, the existing pipe 10 may be crushed by expanding the diameter from the inside. In the present technology example , 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 technology example , the annular groove portion 40 is formed at the 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 mounting pipe 12 are connected by an appropriate technique, and the connection work between the new pipe 20 and the mounting pipe 12 is completed.

( Operation by this technology example )
According to reconstruction method of buried pipe which definitive in this art example, before propulsion by the excavator is started, a predetermined position A of the inner surface of the mounting tube 12, an annular groove 40 is formed. 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 technology example, 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 technical example )
FIG. 7 is a process diagram showing the main steps of the buried pipe restructuring method according to the third technical example , and FIG. 8 is a schematic diagram showing the relationship between the crushing portion of the mounting pipe 12 and the excavation tunnel T according to the technical example . is there.
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 pipe 12 is equivalent to the predetermined position A of the attachment pipe 12 in the first technical example , as shown in FIG.

In addition, in this technical example , although the attachment pipe 12 is crushed by construction from the drainage pipe 11, this technique 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 technology example , the existing pipe 10 is cut and crushed to be demolished. However, the present invention is not limited to this. For example, the existing pipe 10 may be crushed by expanding the diameter from the inside. In the present technology example , 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 the present technology example , the mounting pipe 12 is crushed from the joint portion with the existing pipe 10 to the predetermined position A before propulsion by the excavator is started. 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 technology example )
According to reconstruction method of buried pipe which definitive in this art example, before propulsion by the excavator is started, the attachment tube 12 are crushed from the junction between the existing pipe 10 to a predetermined position A. 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 the existing pipe 10 as in the present technology example, the influence of the propulsion machine propulsion does not reach the mounting pipe 12.

  The present invention is not limited to the above-described embodiment as it is, 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 diagram showing the main steps of reconstruction methods buried pipe according to the first example technique. Schematic which shows the relationship between the cutting part of the attachment pipe which concerns on the same technical example , and an excavation tunnel. The process figure which shows the main processes of the reconstruction method of the buried pipe which concerns on one 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. The process figure which shows the main processes of the reconstruction method of the buried pipe which concerns on a 2nd technical example . Schematic which shows the relationship between the groove part and excavation tunnel which are formed in the attachment pipe which concerns on the same technical example . Process drawing which shows the main processes of the reconstruction method of the buried pipe which concerns on a 3rd technical example . Schematic which shows the relationship between the crushing part of the attachment pipe which concerns on the same technical example , 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 (1)

It is embedded in the ground, and drainage chambers connected to existing pipe, the crushing by promoting excavator, by installing a new pipe in the excavation tunnel formed behind the excavator, the existing Rutotomoni replace the tube to the new設管in設管reconstruction method of embedding connecting the catch basin provided in the outer excavating a tunnel with the new pipe,
Before propelling the excavator,
On the inner surface of the mounting tube for connecting the catch basin and the existing pipe, so as to extend from the front Kiho cutting any position outside the tunnel towards the catch basin, to form a reinforcing member for reinforcing the mounting tube A method for reconstructing a buried pipe, characterized by comprising:

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