JP3396410B2 - Construction method of lining pipe in sewer - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for continuously installing lining pipes in existing pipes such as sewer pipes and water pipes without cutting the ground.

[0002]

2. Description of the Related Art In general, a long profile formed in a long strip shape is supplied into a pipe while maintaining a spiral shape.
There is known a construction method in which a pipe manufacturing apparatus in the pipe is advanced while spirally winding a long profile to form a lining pipe in the pipe.

The long profile used for such construction is made of a resin belt-shaped member formed in a long belt shape, and a long metal reinforcement formed on the belt-shaped member. The thing which fitted the member etc. is used.

Among them, a long profile in which a belt-like member is fitted with a reinforcing member is a lining pipe having a large diameter circular cross section and an elliptical cross section, or a cross section having corner portions such as a rectangular cross section and a horseshoe cross section. It is used when forming a shaped lining tube. That is, this long profile prevents the resin band-shaped member bent into a shape having a corner portion due to elastic deformation from trying to restore its original shape by the flexibly deformed metal reinforcing member. It is configured to maintain a cross-sectional shape having a corner portion.

Here, as the long profile, a long one wound around a drum in a state where a reinforcing member is fitted to a belt-shaped member is used, but there is a case where the supply amount of one drum is insufficient. In such a case, the long profile of another drum is added and used.

As a method for connecting and connecting the long profiles, conventionally, there is a method of melting and softening the ends of the belt-shaped members by heat and abutting them to perform fusion and integration. Further, there is a method of applying a short joint to the end of a reinforcing member having a long profile to be replenished and connected, and fixing the ends of the reinforcing member by riveting or welding (for example, Japanese Patent Laid-Open No. 8-296767). .

[0007]

By the way, according to the method of fusion-bonding the end portions of the strip-shaped member to each other, a dedicated device is required, so that it cannot be performed in a pipe or a manhole, and a long length is required. The profiles must be added and connected on the ground before being introduced into the culvert. Therefore, it is not possible to know at which position in the pipe the pipe is to be pipe-formed by actually making the pipe. Therefore, the cross-sectional shape having a corner portion such as a rectangular cross-section or a horseshoe cross-section. When forming the lining pipe of, the connection part comes to the position of the corner part where the curvature is small and the load is most applied, the strength of the welding welding varies, and if bent with a small curvature, cracks and disengagement will occur, This causes inconveniences such as continuation of construction, injection of backing agent, and difficulty in securing a smooth inner surface.

On the other hand, in the method of connecting the reinforcing member with the rivet, it is necessary to form a hole for penetrating the rivet at the end of the reinforcing member, and an extra joint for connection is required. Further, the rivet hole for connection and the joint are provided at the beginning and the end of the reinforcing member when the reinforcing member is supplied, but in actual construction, there is a case where the cutting is unavoidable due to the extension of the construction. In such a case, it is necessary to work a rivet hole in the end portion of the reinforcing member in the pipe or manhole according to the actual product, and perform rivet connection through a joint.

Further, in the method of welding and connecting the reinforcing member,
Connection work can be done in a pipe or manhole,
The reinforcing member has few flat and easy-to-weld parts, and has a small and complicated shape. Moreover, it is necessary to weld the ends of the reinforcing member having a shape that makes such welding difficult through a joint. Therefore, depending on the welding conditions such as the welding location and the number of welding points, the welding location may come off due to a slight impact, or when joining the strip-shaped member where the reinforcing member was welded during pipe manufacturing work, The place may come off.

In addition, in the replenishment connection of a long profile, if pipe manufacturing is performed without connecting the reinforcing members, the reinforcing members fitted during the pipe manufacturing work may be displaced, resulting in a gap between the reinforcing members. is there. Then, when the lining pipe is constructed while the portion where the reinforcing member is not fitted is formed, the portion which is not fitted is only the belt-shaped member and is not restrained by the reinforcing member, so only that portion is lined. The diameter of the pipe may increase, and as shown in FIGS. 15A and 15B, only the portion where the reinforcing member is not fitted may be in a concave state.

The present invention has been made in view of the above situation, and continuously forms a lining pipe having sufficient strength for constructing a lining pipe having a long laying extension distance by adding and connecting long profiles. An object of the present invention is to provide a method for constructing a lining pipe in a pipe that can be used.

[0012]

In order to achieve the above-mentioned object, a method for constructing a lining pipe according to the present invention comprises a resin strip-shaped member formed in a long strip and a metal strip formed in a long strip. A long profile consisting of a reinforcing member is connected to the distal end of the long profile by adding the leading end of the next long profile to continuously supply the long profile to the pipe and also to wind the spiral profile in the pipe. While turning, this is a construction method in which both side edges of the long profile that are adjacent to each other are joined together to continuously form a lining pipe, and a long profile in which a reinforcing member is projected from one end of the strip-shaped member is used. By the long profile in which the reinforcing member is recessed from one end of the strip-shaped member, the ends of the long profile are received and connected to each other ,
At the connection part of the long profile that is received and connected,
Adhesive tape with longitudinal tensile strength reinforced by fiber
Characterized by connecting the ends of the strip-shaped members by attaching the loops .

According to the lining pipe construction method of the present invention,
Connect the additional end of the long profile to the tip,
A long connecting member in which a reinforcing member is projectingly provided from one end of the belt-shaped member and a receiving connecting portion in which the reinforcing member is recessed from one end of the belt-shaped member are simply fitted to each other and received and inserted.
At the connection part of the profile, use glass fiber to
Adhesive tape with reinforced tensile strength is attached to the strip-shaped member
It is possible to perform the ends just simple to connect, it is possible to connect in a close tube culvert in pipe-position or in the manhole. In addition, a tape is attached to the connection part so that a strip-shaped member
If you connect the ends of the
You can stop.

[0014]

Further, in the lining pipe construction method of the present invention, the ends of the strip-shaped member having a long profile in which the reinforcing member is provided and the strip-shaped member having a long profile in which the reinforcing member is provided are welded to each other. By doing so, it is possible to prevent the connection portion from coming off and to ensure the watertightness of the connection portion.

Further, in the lining pipe construction method of the present invention, when the long profile is received and connected,
The end portions of the reinforcing member protruding from the belt-shaped member and the reinforcing member recessed from the reinforcing member may be locked to each other, and in this case also, the connecting portion can be prevented from coming off. Moreover, there is no concave deformation in the connection part,
It is possible to manufacture a lining pipe having a smooth inner surface.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

First, a long length used for construction of lining pipes
The profile 1 is composed of a belt-shaped member 2 and a reinforcing member 3, as shown in FIGS.

The belt-shaped member 2 is a member formed by molding hard vinyl chloride or the like into a long belt-like shape. A plurality of ribs 21 are formed on the outer surface of the belt-shaped member 2 along the longitudinal direction. Joining portions 2a, 2b that overlap and engage with each other
Are formed. A packing 22 is provided near the joint 2b to ensure the sealing of the joint. Further, the reinforcing member 3 is a long strip-shaped member made of metal (for example, steel) processed into a W-shaped cross section.

The long profile 1 having the above structure
Is wound around the drum D (see FIG. 3) in a state where the reinforcing member 3 is fitted between the ribs 21 of the belt-shaped member 2 and is supplied to the construction site in this state.

Pipe manufacturing apparatus 1 used for construction of lining pipes
0 is a rectangular annular guide frame 1 as shown in FIG.
1. A forming frame 13 having an annular body structure including guide rollers 12 ... 12 arranged at predetermined intervals and angles and link bodies 13a ... 13a connecting the guide rollers 12 ... 12 to each other, and this forming The joining mechanism portion 14 arranged on the frame 13 is mainly configured.

The joining mechanism 14 includes an outer roller 14a, an inner roller 14b, and a hydraulic motor 14 for driving them.
c is provided, and the long profile 1 is sandwiched between the outer surface roller 14a and the inner surface roller 14b, and by driving the rollers 14a and 14b, the entire pipe manufacturing apparatus moves circularly in the pipe. It is configured such that the long profile 1 is advanced while being spirally wound, and in the course of the process, the joining portions 2a and 2b of the long profile 1 are joined to each other to form a lining pipe having a rectangular cross section. There is.

Next, an embodiment of the lining pipe construction method of the present invention, that is, an embodiment of the construction method in which the long profile 1 is replenished and connected to continuously form a lining pipe having a rectangular cross section in a pipe, will be described below with reference to the drawings. It will be described based on.

In FIG. 3, Q1 is the upstream manhole,
Q2 is the downstream manhole. In the above-ground part, the drum D around which the long profile 1 is wound is arranged on the upstream manhole Q1 side, and the hydraulic drive source G is arranged on the downstream manhole Q2 side. The construction works from upstream to downstream. Is done.

First, the pipe manufacturing apparatus 10 is carried into the existing pipe pit P to be rehabilitated through the manhole Q1. Next, the long profile 1 is drawn into the manhole Q1, and the long profile 1 is manually wound several times (about three times) in the manhole Q1 to produce a lining pipe (this is called a starting lining pipe) R0. To do. The circumference of the inner surface of the starting lining pipe R0 is equal to the circumference of the pipe manufacturing apparatus 10.

The pipe-making device 10 is incorporated inside the starting lining pipe R0, and the joining mechanism portion 14 of the pipe-making device 10 is installed in a predetermined state at the front edge of the starting lining pipe R0. In this way, the pipe manufacturing apparatus 10 having the starting lining pipe R0 assembled therein is drawn into the existing pipe ditch P.

When the joining mechanism portion 14 of the pipe manufacturing apparatus 10 is driven in the above-described state, the length of the newly supplied pipe is continuous with the starting lining pipe R0 due to the narrowing force between the outer surface roller 14a and the inner surface roller 14b. The shaku profile 1 is joined to the starting lining pipe R0 by joining the joining portions 2a and 2b which are in contact with each other. At the same time, the pipe manufacturing apparatus 10
Revolves in the circumferential direction of the pipe P and advances in the pipe axis direction of the pipe P, and with the movement of the pipe manufacturing apparatus 10, the long profile 1 is spirally wound and The long profiles 1 are sequentially joined and the lining pipe R is constructed.

In the present embodiment, when the supply amount of the long profile 1 fed from one drum D is insufficient, another long profile 1 fed from this drum D is provided with another member at the end portion thereof. The long profile 1 is continuously supplied by adding and connecting the end portions of the long profile 1 fed from the drum D.

The additional connection is as shown in FIG.
An insertion connecting portion 1a in which a reinforcing member 3 is projectingly provided from a strip-shaped member 2 at the end of the long profile 1 and the long profile 1
This is performed by receiving and connecting the receiving member 1b in which the reinforcing member 3 is recessed from the belt-shaped member 2 at the tip end of.

Of these connecting portions, the insertion connecting portion 1a is
It can be formed by cutting only the strip member 2 at the end of the long profile 1 by a predetermined width, and the receiving connection portion 1b cuts only the reinforcing member 3 at the tip of the long profile 1 by a predetermined width. It can be formed by Since this cutting work is performed only by cutting the strip-shaped member 2 or the reinforcing member 3, it can be easily performed with an electric tool such as a handy type electric cutter or an electric grinder.

[0031]

Further, the connection portion of the elongated profile 1 shown in FIG. 4, since it is just a fitting structure, there is a possibility that omission by some force, in order to prevent this,
In the lining pipe construction method of the present invention , as shown in the front view (A), the back view (B) and the side view (C) of FIG. 5, a tape 4 is attached to the connecting portion of the long profile 1, By performing the construction of connecting the end portions of the strip-shaped member 2 to each other, the connection portion is prevented from coming off.

Examples of the tape used, as shown in FIG. 6, use adhesive tape tensile strength in the longitudinal direction by the glass fiber 4a · · 4a is reinforced (filament tape) 4
Can be It is preferable that the adhesive tape 4 is attached to both the front and back surfaces of the long profile 1 as shown in FIG. The adhesive tape 4 may be removed after the pipe manufacturing is completed.

Further, in the present embodiment, in order to secure the watertightness of the connecting portion of the long profile 1, it is possible to assist the welding of the end portions of the strip-shaped members 2 of the long profile 1 which are received and connected. Adopt the construction method.

The concrete method of the welding connection is, as shown in FIG. 7, a method of directly connecting the ends of the strip-shaped members 2 of the long profile 1 which has been inserted and connected by vinyl chloride welding, or As shown in FIG. 8, the belt-shaped member 2
When a gap C is formed between the ends of the strips, a method of disposing a contact plate (vinyl chloride plate) 5 at the connecting portion and welding the strip-shaped members 2 with vinyl chloride can be mentioned.

If the surface needs to be smoothed when the above-described welding connection is performed, the surface protruding by welding is cut to smooth the surface.

Here, when a high level of watertightness is required due to internal water pressure, external water pressure, etc. in the lining pipe constructed in the pipe conduit, the connection part of the long profile to be replenished and the peripheral part thereof are connected. After applying the water-swelling bonding agent to the fitting portion, a construction method of receiving and inserting the long profile may be performed, and if such a construction method is carried out, it is applied to the connection portion and the fitting portion around it. The water-swellable bonding agent expands due to the surrounding moisture and fills the gap, so that the water tightness at the connection portion can be improved. Furthermore, if the rib portion of the connection portion of the long profile is filled with the water blocking material from the outside (the back side of the connection portion) of the manufactured lining pipe, higher water tightness can be secured.

On the other hand, with respect to the reinforcing member 3, when the long profile 1 is inserted and connected, an auxiliary construction method of engaging the ends of the reinforcing member 3 with each other is performed.

The specific method will be described with reference to FIGS. First, as shown in FIG. 9, the reinforcing member 3 at the end of the long profile 1 to be received, inserted, and connected is removed from the rib portion of the belt-shaped member 2.

In the method shown in FIG. 10, the end of the removed reinforcing member 3 is machined with a hole 3a by an electric drill, and the end of the other reinforcing member 3 is machined with hook-shaped claws 3b. (A) By hooking the hook-shaped claw 3b into the hole 3a, the ends of the reinforcing member 3 are connected to each other in a state where they are partly overlapped (B).

In the method shown in FIG. 11, the hole 3a is formed in the end portion of one of the reinforcing members 3 with an electric drill in the same manner as above.
As for the other reinforcing member 3, the end portion is cut to form the locking piece 30, and the locking piece 30 is cut and bent to form the claw 30b (A).
The ends of the reinforcing member 3 are connected to each other by hooking 0b into the hole 3a (B). With this method, mutual connection can be performed without overlapping the main body of the reinforcing member 3.

The method shown in FIG. 12 is a method in which holes are not processed, and the ends of each reinforcing member 3 are bent in opposite directions (A), and the bent pieces 31a and 31b are hooked to each other. This connects the reinforcing members 3 to each other (B).

In the method described above, the hook-shaped claw 3a, the locking piece 30 and the claw 30b are not particularly limited in shape as long as they can be caught in the hole 3a.
Further, the bent pieces 31a and 31b may have any shape.

Here, in the construction method for forming a lining pipe using a long profile in which a reinforcing member is fitted, the behavior of the reinforcing member being displaced is that the long profile is joined during the pipe manufacturing process. It is time to go, and only during the process of joining in a spiral shape, it is sufficient if the state in which the end portions of the reinforcing member are connected to each other is maintained without opening a gap between the end portions of the reinforcing member. The purpose of the invention can be sufficiently achieved by locking the hook with the simple mechanism as described above.

Since the lining pipe construction method and each auxiliary construction method described above can be carried out without the need for a dedicated connecting jig or electric equipment,
It is a connection method that can be used not only on the ground but also in manholes and pipes.

Therefore, when constructing a pipe other than a circular pipe such as a rectangular pipe, even if it is desired to make a connection so that the connecting portion is not located at a corner, the pipe is connected immediately before the long profile is fitted and the pipe is manufactured. Therefore, compared with the case of fusion-splicing on the ground by the conventional method, the connection position does not shift even if the pipe span construction pipe span length becomes long.

In the above embodiment, the receiving connection portion 1b is formed at the end of the long profile 1 and the connection portion 1a is formed at the tip of the long profile 1 (FIG. 4). However, the present invention is not limited to this, and the connecting portion 1a may be formed by inserting the end portion of the long profile 1 and the receiving connecting portion 1b may be formed at the tip end of the long profile 1.

Further, in the above embodiment, the long profile 1 in which the one reinforcing member 3 is fitted into the one belt-shaped member 2 has been described, but as shown in FIG. The member 2 may have two reinforcing members 3 fitted therein. In this case, only the insertion connecting portion 1a or only the receiving connecting portion 1b may be formed at the distal end portion or the tip end portion of the long profile 1. Alternatively, as shown in FIG. 13, the inserting connecting portion 1a and the receiving connecting portion may be formed. 1b may be formed respectively.

Further, in the above-mentioned embodiments, the case where a lining pipe having a rectangular cross section is applied has been described, but the shape thereof is not particularly limited, and the lining pipe having a horseshoe cross section having a corner portion. Alternatively, the present invention can be applied to the construction of a lining pipe having a circular cross section or an elliptical cross section.

Here, the structure of the long profile used in the lining pipe construction method of the present invention is not particularly limited, and in addition to the structure shown in FIG. 1, for example, as shown in FIG. Joints 1 at both ends in the width direction of the
02a is formed, and at the time of joining, the fitting member 103 is fitted into the joining portions 102a in a state where the side surfaces of the joining portions 102a of the strip-shaped member 102 are in mutual contact as shown in FIG. The belt-shaped members 102 may be joined to each other by means of.

[0051]

<Example 1> As a long profile, a steel W-shaped reinforcing member was fitted to an Eslon reblock # 79S (trade name, manufactured by Sekisui Chemical Co., Ltd.) (7
05m), a lining pipe is made in a rectangular pipe of 1500 mm square as shown in FIG. 3, and the end of the long profile and the tip of the long profile to be connected and connected are cut. After providing the insertion connecting portion 1a and the receiving connecting portion 1b as shown in FIG. 4, the receiving and inserting connection of the long profile was performed.

As an auxiliary construction method, after applying a water-expandable bonding agent (ESLON HIGH SEAL No. 2; Sekisui Chemical Co., Ltd., trade name) to the connection part of the long profile and the fitting part around it. Connect and receive the long profile and connect the glass fiber reinforced adhesive tape (filament tape; Sumitomo 3M Co., Ltd., trade name) to the connection part of the long profile as shown in FIG. went.

As a result, the time required for connecting the long profile was shortened as compared with the conventional fusion splicing method, and there was no hindrance in the pipe manufacturing work.

After pipe production, a vinyl chloride welding machine (vinyl chloride welding rod φ3 mm single, double) was used to perform vinyl chloride welding of the connection portion of the long profile in the manner shown in FIG. It was confirmed that construction could be done without problems. <Embodiment 2> As a long-length profile, an ESLON reblock # 79S (trade name, manufactured by Sekisui Chemical Co., Ltd.) in which a steel W-shaped reinforcing member is fitted (705 m) is used and shown in FIG. 1500 points
A lining pipe was produced in a rectangular pipe with a square of mm.

Then, after the lining pipe has been manufactured for a distance of about 2 m, the reinforcing member at the end of the long profile for which this pipe has been manufactured is removed from the rib portion (see FIG. 9), and its end is electrically driven. While processing the hole with a drill,
A hook-shaped claw is processed at the end of the reinforcing member at the tip of the long profile to be replenished and connected, and the ends of the reinforcing member are connected in the manner shown in FIG. Then, the pipe manufacturing work was restarted in this state.

As a result, regarding the reinforcing member, the connecting portion did not come off during pipe manufacturing. Further, when the inner wall of the connecting portion was observed from the inside of the lining pipe produced, no concave portion was found.

[0057]

As described above, according to the lining pipe construction method of the present invention, a long profile in which the reinforcing member is provided in a convex shape from one end of the strip-shaped member and the reinforcing member is concave from the one end of the strip-shaped member. With the long profile provided, the ends of the long profile are received and connected to each other, so there is no need to connect the ends of the long profile on the ground in advance, and it is easy to use in a pipe or manhole. Can be connected. Therefore, the connection work can be performed at a position closer to the pipe manufacturing position, and the connection portion of the long profile can be prevented from being located at the corner portion of the lining pipe. Moreover, by inserting and connecting the long profile in which the reinforcing member is projecting from one end of the strip-shaped member and the long profile in which the reinforcing member is recessed from one end of the strip-shaped member, the connection position of the strip-shaped member can be obtained. Since the connecting positions of the reinforcing members are displaced from each other, sufficient connecting strength can be obtained regardless of the simple connecting structure.

[0058] In addition, your lining tube construction method of the present invention
In addition , the tensile strength in the length direction is reinforced by the glass fiber at the connection part of the long profile that is inserted and connected.
Adhesive tape to connect the ends of the strips
Therefore, it is possible to prevent the connecting portion from coming off.

If the ends of the strip-shaped members of the long profile that are received and inserted and connected are welded to each other, the connection can be prevented from coming off and the watertightness of the connection can be secured. it can.

Further, when the long profile is received and inserted and connected, if the end portions of the reinforcing member protruding from the belt-shaped member and the reinforcing member recessed from the reinforcing member are locked, It is possible to prevent the connecting portion from coming off, and it is possible to form a lining pipe having a smooth inner surface without causing a concave deformation in the connecting portion.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a long profile used for construction of a lining pipe.

FIG. 2 is a front view showing the structure of a pipe manufacturing apparatus used for constructing a lining pipe.

[Fig. 3] Explanatory view of a method for constructing a lining pipe in a pipe.

FIG. 4 is a partial perspective view showing an example of a connected state of a long profile.

FIG. 5 is a diagram showing a method of applying a lining pipe according to the present invention, in which an adhesive tape is attached to connect the end portions of the strip-shaped member to each other.
Explanatory diagram showing the state

FIG. 6 is a diagram schematically showing the structure of an adhesive tape used in the present invention .

FIG. 7 is an explanatory view of an auxiliary construction method (welding connection) performed in the lining pipe construction method of the present invention.

FIG. 8 is an explanatory view of another example of the auxiliary construction method (welding connection).

FIG. 9 is an explanatory view of an auxiliary construction method (locking connection) carried out in the lining pipe construction method of the present invention.

FIG. 10 is an explanatory view of the auxiliary method (locking connection).

FIG. 11 is an explanatory view of another example of the auxiliary construction method (locking connection).

FIG. 12 is an explanatory diagram of still another example of the auxiliary method (locking connection).

FIG. 13 is a partial perspective view showing another example of the connection state of the long profile.

FIG. 14 is a diagram showing another example of a long profile used for construction of a lining pipe.

FIG. 15 is an explanatory diagram of a problem that occurs when the reinforcing member is not connected in the replenishment connection of the long profile.

[Explanation of symbols]

1 Long profile 1a Insert connection part 1b Receiver connection 2 band members 2a, 2b joint 21 ribs 3 Reinforcement member 3a hole 3b nail 4 adhesive tape 10 Pipe making equipment P pipe R lining tube

Claims (3)

(57) [Claims] 1. A long profile consisting of a resin-made belt-shaped member formed in a long band shape and a metal-made reinforcing member formed in a long band, and a long profile of By adding and connecting the tips, while continuously feeding into the pipe conduit, while spirally winding inside the pipe conduit, the two side edges of the long profile that are adjacent to each other are joined together to form a lining pipe. In the construction method of continuously forming, the long profile in which the reinforcing member is projected from one end of the strip-shaped member and the long profile in which the reinforcing member is recessed from one end of the strip-shaped member Long ends that are inserted and connected by receiving and connecting the ends of the isometric profile
At the connection of the profile, lengthwise by glass fiber
Adhesive tape with reinforced tensile strength is applied to the strip
A method for constructing a lining pipe in a pipe, characterized in that the ends of the material are connected to each other . 2. The method for constructing a lining pipe in a pipe according to claim 1, wherein the ends of the strip-shaped members of the long profile received and inserted and connected are welded to each other. 3. The construction method according to claim 1 or 2 , wherein when the long profile is received, inserted and connected, the end portions of the reinforcing members are locked to each other. Method.