JPH11147256A - Method for constructing lining pipe in conduit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for constructing a lining pipe in a conduit to continuously form a lining pipe having sufficient strength. SOLUTION: For extending a long-sized profile, a reinforcing member 3 of one long-sized profile 1 is protruded from an end of a belt-shaped member 2 to form an insert connection part 1a and a reinforcing member 3 of the other long-sized profile 1 is retracted from an end of a belt-shaped member 2 to form a receiving connection part 1b. And the part 1a is inserted into the part 1b to form a connection. As an auxiliary construction method, there are a method wherein a tape is bonded to the connection of the long-sized profiles to connect the ends of the belt-shaped members, a method wherein the ends of the belt-shaped members are welded to each other, and further a method wherein when an insert connection part and a receiving connection part are connected, an end of the insert connection part is engaged with an end of the receiving connection part.

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 constructing a lining pipe in an existing sewer such as a sewer pipe and a water pipe 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 sewer while maintaining a spiral shape, and a pipe making device in the sewer converts the long profile into a spiral shape. 2. Description of the Related Art There is known a construction method in which a lining pipe is formed in a pipe while being advanced while being wound.

The long profile used for such construction includes a resin band member formed in a long strip shape, and a metal reinforcement formed in a long strip shape on the strip member. What fitted the member etc. is used.

Among them, a long profile in which a reinforcing member is fitted to a belt-like member has a large-diameter lining tube having a circular or elliptical cross-section, or a cross-section having a corner having a rectangular or horseshoe cross-section. It is used when forming a lining tube of a shape. In other words, this long profile prevents the resin band-shaped member bent into a shape having a corner portion by elastic deformation from trying to restore the original shape by the metal deformation member deformed flexibly. It is configured such that a cross-sectional shape having a corner portion can be maintained.

The long profile used here is a long profile wound around a drum in a state where a reinforcing member is fitted to a belt-shaped member. However, the supply of one drum may be insufficient. In such a case, when such a situation occurs, another drum long profile is added and connected.

[0006] As a method of adding and connecting the long profiles, there is a method of fusing and integrating the end portions of the belt-shaped members by melting and softening the ends with heat and abutting them. Further, there is a method in which a short joint is applied to an end of a reinforcing member having a long profile to be added and connected, and the ends of the reinforcing member are fixed to each other by riveting or welding (for example, JP-A-8-296767). .

[0007]

However, according to the method of fusion splicing the ends of the belt-shaped members, a dedicated device is required, so that the method cannot be carried out in a sewer or a manhole, and is long. The profile must be added and connected on the ground before being introduced into the sewer. Therefore, it is not known where this connection portion is formed in the sewer unless the pipe is actually manufactured. For this reason, the cross-sectional shape having a corner portion such as a rectangular cross section or a horseshoe cross section is not known. In the case of forming a lining pipe, the connection part comes to the position of the corner part where the curvature is small and the load is the most, the strength of welding welding varies, and if it is bent with a small curvature, cracks and detachment will occur, There are 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 by rivets, it is necessary to form a hole through which the rivet is formed at the end of the reinforcing member, and an additional connection joint is required. Also, rivet holes and joints for connection are provided at the beginning and the end of the reinforcing member when supplying the reinforcing member, but in actual construction, cutting may be forced midway due to extension of the construction, In such a case, it is necessary to perform an operation of forming a rivet hole at the end of the reinforcing member in a pipe or a manhole according to the actual product, and connecting the rivet through a joint.

Further, in the method of connecting the reinforcing member by welding,
Connection work can be performed in sewers and manholes,
The reinforcing member has few flat and easy-to-weld parts and has a small and complicated shape, and it is necessary to weld the ends of the reinforcing member having such a shape that it is difficult to perform welding via a joint. Therefore, depending on the welding conditions, such as the welding location, the number of welding points, etc., the welding location may come off due to a slight impact, or when joining the belt-shaped members where the reinforcing members were welded during pipe production work. Some parts may come off.

[0010] In addition, when pipes are made without connecting reinforcing members in the extension connection of a long profile, the reinforcing members fitted during pipe forming work may be displaced, and a gap may be generated 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 where the reinforcing member is not fitted is only the band-shaped member and is not restrained by the reinforcing member. As shown in FIGS. 15 (A) and 15 (B), the pipe may expand, and 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 such circumstances, and when a lining pipe having a long laying extension length is constructed by adding and connecting long profiles, a lining pipe having sufficient strength is continuously formed. It is an object of the present invention to provide a method for constructing a lining pipe in a sewer which can be performed.

[0012]

In order to achieve the above object, a method for constructing a lining pipe according to the present invention comprises a long strip-shaped resin band member and a long metal strip member. A long profile composed of a reinforcing member is connected to a distal end of the long profile by adding a tip end of the next long profile, so that the long profile is continuously supplied into a sewer and spirally wound in the sewer. While rotating, the side edges of the long profile that are in contact with each other are joined together, and this is a construction method in which the lining pipe is continuously formed, and the long profile in which the reinforcing member is protruded from one end of the band-shaped member. A long profile in which the reinforcing member is recessed from one end of the band-shaped member is characterized by receiving and connecting the ends of the long profile.

According to the lining pipe construction method of the present invention,
Add the connection between the end and the end of the long profile,
Since the insertion connection portion in which the reinforcing member is protruded from one end of the band-shaped member and the receiving connection portion in which the reinforcement member is recessed from one end of the band-shaped member can be easily performed simply by fitting together, Connection within a sewer or manhole close to the pipe making position is possible.

Here, in the lining pipe construction method of the present invention, if a tape is attached to the connection portion of the long profile which is inserted and connected to connect the ends of the band-shaped members to each other, the connection portion can be connected. Dropout can be prevented.

[0015] In the lining pipe construction method of the present invention, the end of the long profile strip having the reinforcing member protruded and the long profile strip having the reinforcing member recessed 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 performing insertion and connection of a long profile,
The ends of the reinforcing member protruded from the belt-shaped member and the reinforcing member recessed from the reinforcing member may be engaged with each other, and in this case, the connection portion can be prevented from coming off. Moreover, no concave deformation occurs at the connection part,
A lining tube having a smooth inner surface can be manufactured.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

First, as shown in FIGS. 1A and 1B, a long profile used for construction of a lining pipe is as follows.
It is constituted by a belt-shaped member 2 and a reinforcing member 3.

The belt-shaped member 2 is a member formed by forming a long band of hard vinyl chloride or the like, and a plurality of ribs 21 are formed on the outer surface thereof along the longitudinal direction. Joints 2a, 2b that overlap and engage
Are formed. In the vicinity of the joint 2b, a packing 22 for securing the seal of the joint is provided. The reinforcing member 3 is a metal (for example, steel) long strip-shaped member processed into a W-shaped cross section.

The long profile 1 having the above structure
Is wound around a 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 supplied to a construction site in this state.

Pipe making apparatus 1 used for lining pipe construction
0 is a rectangular annular guide frame 1 as shown in FIG.
1. A molding frame 13 having an annular structure composed of guide rollers 12... 12 arranged at predetermined intervals and at an angle, and link bodies 13a. It is mainly constituted by a joining mechanism section 14 provided on the frame 13.

The joining mechanism 14 includes an outer roller 14a, an inner roller 14b, and a hydraulic motor 14 for driving them.
In the state where the long profile 1 is sandwiched between the outer roller 14a and the inner roller 14b, the driving of the rollers 14a and 14b causes the entire pipe-making apparatus to move around in the sewer. The long profile 1 advances while being spirally wound, and the joining portions 2a and 2b of the long profile 1 are joined to each other in the progressing process to form a lining tube having a rectangular cross section. I have.

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

In FIG. 3, Q1 is an upstream manhole,
Q2 is the downstream manhole. In the above-ground portion, a drum D around which the long profile 1 is wound is disposed on the upstream manhole Q1 side, and a hydraulic drive source G is disposed on the downstream manhole Q2 side. Work is performed from the upstream side to the downstream side. Done.

First, the pipe making apparatus 10 is carried into the existing pipe 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 tube (referred to as a starting lining tube) R0. I do. The circumference of the inner surface of the starting lining pipe R0 is equal to the circumference of the pipe-making apparatus 10.

The pipe-making apparatus 10 is installed inside the starting lining pipe R0, and the joining mechanism 14 of the pipe-making apparatus 10 is set in a predetermined state at the front edge of the starting lining pipe R0. Thus, the pipe-making apparatus 10 with the starting lining pipe R0 assembled therein is drawn into the existing sewer P.

In the above state, when the joining mechanism 14 of the pipe producing apparatus 10 is driven, the newly supplied length is connected to the starting lining pipe R0 due to the narrow adhesion between the outer roller 14a and the inner roller 14b. The length profile 1 is joined to the starting lining tube R0 by joining the joining portions 2a and 2b which are in contact with each other. At the same time, the pipe making device 10
Is revolved in the circumferential direction of the sewer P, and advances in the pipe axis direction of the sewer P. With the movement of the pipe-making apparatus 10, the long profile 1 is spirally wound. Long profiles 1 are sequentially joined to form the lining pipe R.

In this embodiment, when the supply amount of the long profile 1 fed from one drum D is insufficient, another end portion of the long profile 1 fed from the drum D is attached to another end. The long profile 1 is continuously supplied by adding and connecting the tips of the long profile 1 fed from the drum D.

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

Of these connection parts, the insertion connection part 1a is
It can be formed by cutting only the band-shaped 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 the predetermined width. Can be formed. Since this cutting operation only cuts the band-shaped member 2 or the reinforcing member 3, it can be easily performed by a power tool such as a handy type electric cutter or an electric grinder.

Next, an auxiliary method implemented in the lining pipe construction method of the present invention will be described below with reference to the drawings.

First, since the connecting portion of the long profile 1 shown in FIG. 4 has a simple fitting structure, there is a possibility that the connecting portion may come off due to some force, and this embodiment is used as an auxiliary method for preventing this. In the embodiment, as shown in the front view (A), the back view (B) and the side view (C) of FIG.
Attach the tape 4 to the connection of the long profile 1,
By performing the construction of connecting the ends of the belt-shaped member 2 to each other, the connection portion is prevented from coming off.

As the tape used in this auxiliary method,
As shown in FIG. 6, it is preferable to use an adhesive tape (filament tape) 4 whose tensile strength in the longitudinal direction is reinforced by glass fibers 4a.
Is preferably attached to the front and back surfaces of the long profile 1 as shown in FIG. Note that the adhesive tape 4 may be removed after the completion of the pipe production.

Further, in this embodiment, in order to ensure the watertightness of the connecting portion of the long profile 1, the end of the strip-shaped member 2 of the long profile 1 inserted and connected is welded to each other. Adopt construction method.

As a specific method of the welding connection, as shown in FIG. 7, a method of directly connecting the ends of the strip-shaped members 2 of the long profile 1 which have been inserted and connected by vinyl chloride welding, or As shown in FIG.
In the case where a gap C is formed between the end portions, a method of arranging a patch plate (vinyl chloride plate) 5 at the connection portion and performing vinyl chloride welding to each band-shaped member 2 can be used.

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

Here, when a high level of water tightness is required in the lining pipe constructed in the sewer due to internal water pressure, external water pressure, etc., the connection portion of the long profile to be reconnected and the peripheral portion thereof are connected. After applying the water-swellable bonding agent to the fitting portion, a method of receiving and connecting the long profile may be performed, and if such a method is performed, the connection portion and the surrounding fitting portion are applied. The water-swellable bonding agent expands due to the surrounding moisture and fills the gaps, thereby increasing the watertightness at the connection. Furthermore, if a water-stopping material is filled into the rib portion of the connection portion of the long profile from the outside of the formed lining tube (the back side of the connection portion), higher watertightness 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 mutually locking the ends of the reinforcing member 3 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 inserted and connected is removed from the rib of the belt-shaped member 2.

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

In the method shown in FIG. 11, a hole 3a is machined in the end of one reinforcing member 3 with an electric drill in the same manner as described above.
With respect to the other reinforcing member 3, an end portion is cut to form a locking piece 30, and the locking piece 30 is cut and bent to form a claw 30 b (A).
The ends of the reinforcing members 3 are connected by hooking Ob on the holes 3a (B). According to this method, the mutual connection can be performed without overlapping the reinforcing member 3 main bodies.

The method shown in FIG. 12 is a method in which no holes are formed, and the ends of the reinforcing members 3 are bent in opposite directions to each other (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 shapes of the hook-shaped claws 3a, the locking pieces 30, and the claws 30b are not particularly limited as long as they are hooked in the holes 3a.
Also, the bent pieces 31a and 31b can have any shape.

Here, in the construction method in which the lining pipe is formed by using the long profile in which the reinforcing member is fitted, the behavior in which the reinforcing member shifts is that the long profile is joined in the pipe making process. It is time to go, only during the process of joining spirally, without opening a gap between the ends of the reinforcing member, since it is only necessary to maintain the state where the ends of the reinforcing members are connected, The purpose can be sufficiently achieved by locking with a hook having a simple mechanism as described above.

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

Therefore, when constructing a non-circular culvert such as a rectangular culvert or the like, even if it is desired to connect such that the connection portion is not located at a corner portion, the connection is made immediately before fitting the long profile to produce the pipe. Therefore, as compared with the case of fusion splicing on the ground by a conventional method, even if the length of the pipe span made by culverts is increased, the connection position does not shift.

In the above embodiment, the receiving connection 1b is formed at the end of the long profile 1 and the connecting 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 connection portion 1a may be formed at the end of the long profile 1 and the receiving connection portion 1b may be formed at the tip of the long profile 1.

Further, in the above embodiment, the long profile 1 in which one reinforcing member 3 is fitted into one belt-shaped member 2 is described. However, as shown in FIG. The member 2 may have two reinforcing members 3 fitted therein. In this case, only the insertion connection portion 1a or only the reception connection portion 1b may be formed at the distal end portion or the front end portion of the long profile 1, or, as shown in FIG. 13, the insertion connection portion 1a and the reception connection portion. 1b may be formed.

Further, in the above embodiment, the case where a lining pipe having a rectangular cross section is constructed is described, but the shape is not particularly limited, and the lining pipe having a horseshoe cross section having a corner portion is provided. The present invention can also be applied to the construction of a lining pipe having a circular or 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. 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
02a is formed, and at the time of joining, as shown in FIG. 2B, 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 belt-shaped member 102 are brought into phase contact with each other. May be used to join the profiles 101 to each other.

[0051]

<Example 1> A long profile in which a steel W-shaped reinforcing member was fitted to Eslon Reblock # 79S (trade name, manufactured by Sekisui Chemical Co., Ltd.) (7)
05m), a lining pipe is made in a 1500 mm square rectangular culvert in the manner shown in FIG. 3, and a cutting process is performed on the end of the long profile and the tip of the long profile to be added and connected. Then, after the insertion connection portion 1a and the reception connection portion 1b as shown in FIG. 4 were provided, the reception connection of the long profile was performed.

As an auxiliary method, a water-swellable bonding agent (Eslon High Seal No. 2; trade name, manufactured by Sekisui Chemical Co., Ltd.) was applied to the connection portion of the long profile and the fitting portion around the connection portion. The connection and connection of the long profile is performed by using, and a glass fiber reinforced adhesive tape (filament tape; manufactured by Sumitomo 3M Co., trade name) is attached to the connection portion of the long profile in the manner shown in FIG. Was done.

As a result, the time required for connecting the long profile was shorter than that of the conventional fusion splicing method, and no trouble occurred in the pipe making operation.

Then, after pipe production, using a polyvinyl chloride welding machine (vinyl chloride welding rod φ 3 mm single, double), the connection of the long profile was subjected to vinyl chloride welding as shown in FIG. It was confirmed that construction could be done without any problems. <Example 2> FIG. 3 shows a long profile in which a steel W-shaped reinforcing member (705 m) is fitted to Eslon Reblock # 79S (trade name, manufactured by Sekisui Chemical Co., Ltd.). 1500
A lining pipe was produced in a rectangular culvert of mm square.

Then, after the lining pipe is formed by a distance of about 2 m, the reinforcing member at the end of the long profile in which the pipe was formed is removed from the rib portion (see FIG. 9), and an electric motor is attached to the end. While drilling holes,
A hook-like claw is formed at the end of the reinforcing member at the end of the long profile to be added and connected, and the ends of the reinforcing member are connected to each other in the manner shown in FIG. Then, the pipe making operation was resumed in this state.

As a result, the connecting portion of the reinforcing member did not come off during pipe production. When the inner wall of the connecting portion was observed from the inside of the manufactured lining tube, 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 protruded from one end of the band-shaped member, and the reinforcing member is recessed from one end of the band-shaped member. With the long profile installed, the ends of the long profile are inserted and connected, so there is no need to connect the ends of the long profile in advance on the ground, and it is easy in a sewer or manhole. Can be connected. Therefore, the connecting operation can be performed at a position closer to the pipe making position, and the connecting portion of the long profile can be prevented from being located at the corner of the lining pipe. Moreover, by inserting and connecting a long profile in which the reinforcing member is protruded from one end of the band-shaped member and a long profile in which the reinforcing member is recessed from one end of the band-shaped member, the connection position of the band-shaped member is determined. Since the connection positions of the reinforcing members are shifted from each other, sufficient connection strength can be obtained regardless of the simple connection structure.

Here, in the lining pipe construction method of the present invention, if a tape is attached to the connection portion of the long profile that is inserted and connected and the ends of the band-shaped members are connected to each other, the connection portion is formed. Dropout can be prevented.

Further, if the ends of the strip-shaped members having the long profile which are inserted and connected are welded to each other, it is possible to prevent the connection portion from coming off and to ensure the watertightness of the connection portion. it can.

Further, when the insertion and connection of the long profile is performed, if the ends of the reinforcing member protruding from the band member and the reinforcing member concave from the reinforcing member are locked, The connection portion can be prevented from coming off, and a lining tube having a smooth inner surface can be formed without causing a concave deformation in the connection portion.

[Brief description of the drawings]

FIG. 1 is a view 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 making apparatus used for construction of a lining pipe.

FIG. 3 is an explanatory view of a method of constructing a lining pipe in a sewer.

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

FIG. 5 is an explanatory view of an auxiliary construction method (tape attachment) performed in the lining pipe construction method of the present invention.

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

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

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

FIG. 9 is an explanatory view of an auxiliary construction method (locking connection) performed 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 method (locking connection).

FIG. 12 is an explanatory view 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 a reinforcing member is not connected in the extension connection of a long profile.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Long profile 1a Insertion connection part 1b Receiving connection part 2 Band-shaped member 2a, 2b Joint part 21 Rib 3 Reinforcement member 3a Hole 3b Claw 4 Adhesive tape 10 Pipe production device P Sewer R Lining pipe

Claims (4)

[Claims] 1. A long profile formed of a long strip-shaped resin band member and a long metal reinforcing member is attached at its end to the next long profile. By adding and connecting the tips, it is continuously supplied into the sewer, and while spirally wound in the sewer, the mutually adjacent side edges of this long profile are joined together to form a lining pipe. And a continuous profile in which the reinforcing member is protruded from one end of the belt-shaped member, and a long profile in which the reinforcing member is recessed from one end of the belt-shaped member. A method for constructing a lining pipe in a sewer, comprising receiving and connecting ends of a shank profile. 2. The construction method according to claim 1, wherein a tape is attached to a connection portion of the long profile which is inserted and connected to connect the ends of the strip-shaped members. Lining pipe construction method. 3. The method for constructing a lining pipe in a sewer according to claim 1, wherein ends of the strip-shaped members having a long profile that are inserted and connected are welded to each other. 4. The construction method according to claim 1, wherein the long profile is inserted and connected.
A method for constructing a lining pipe in a sewer, wherein ends of a reinforcing member are locked with each other.