JPH06105111B2 - Buried pipe in existing pipe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a pipe body used for rehabilitating an aged sewer pipe or for reinforcing a new pipe buried under a heavy load road. The present invention relates to an existing buried pipe in which a reinforcing bar is arranged on the outer circumference.

(Prior art) Conventionally, as a construction method for rehabilitating an aged existing pipe, a method of inserting a new pipe into the existing pipe and filling and hardening the gap between the existing pipe and the new pipe with backfill concrete has been performed. . However, if the backfilling concrete between the existing pipe and the new pipe alone is used, it is necessary to increase the thickness of the concrete in order to obtain strength, and the inner diameter of the pipeline becomes small. Therefore, Japanese Patent Laid-Open No. 56-131879 discloses that a concrete layer is reinforced with reinforcing bars. That is, as a reinforcing method of the existing pipe, insert the insertion pipe through the iron strip cylinder woven into the existing pipe,
A method of filling and solidifying cement milk between an existing pipe and an insertion pipe is disclosed.

(Problems to be Solved by the Invention) However, it is difficult to maintain the cylindrical shape because of the structure because it is difficult to maintain the cylindrical shape due to the structure, and the weight is increased when the diameter of the cage is increased due to the insertion of the iron rod tube woven into the cage for reinforcing the insertion tube. It becomes large and it becomes difficult to insert it into the existing pipe. In addition, it is difficult to arrange the reinforcing bar of the steel strip evenly between the insertion pipe and the existing pipe.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an embedded pipe in which existing reinforcing pipes are simply and economically reinforced, and which is inserted into an existing pipe. .

(Means for Solving the Problem) An existing pipe embedded tube according to the present invention includes a support member that supports a locking member that locks a reinforcing bar and a pipe body in a circumferential direction of an outer peripheral surface of a pipe body that is inserted into the existing pipe. An annular jig provided with is provided, and the reinforcing bars are arranged in the axial direction and the circumferential direction of the tubular body via the locking member.

(Operation) In the existing pipe embedded in the pipe, an annular jig including a locking member that locks the reinforcing bar and a support tool that supports the pipe is attached to the outer peripheral surface of the pipe, and the locking member is interposed. Reinforcing bars are arranged in the axial direction and the circumferential direction of the tubular body. In this state, the reinforcing bar can be securely, easily and easily attached to the optimum position by the locking member. Further, when the buried pipe is pushed into the existing pipe, the buried pipe can be inserted into the existing pipe in a concentric manner by a support tool that supports the buried pipe. In the state where this buried pipe is inserted, since reinforcing bars are arranged on the outer peripheral surface of the buried pipe, concrete is poured into the gap between the existing pipe and the buried pipe to solidify it, so that the pipeline of the reinforced concrete structure Can be configured.

(Example) Hereinafter, the Example of this invention is described with reference to drawings.

Figure 1 shows a buried pipe in an existing pipe (hereinafter simply referred to as a buried pipe).
1 shows an outline of the entire configuration of No. 1.

In the figure, the buried pipe 1 is arranged in the circumferential direction of the outer peripheral surface of the tubular body 2.
The annular jigs 3 are provided at appropriate intervals, the reinforcing bars 7 are provided on the outer periphery of the tubular body 2 via the locking members 5 provided on the jigs 3, and the wheels (support The pipe body 2 is supported by the tool 4.

The tube body 2 is an ordinary tube available on the general market, for example,
A hard vinyl chloride pipe, a synthetic resin pipe such as a polyethylene pipe, and a glass fiber reinforced composite pipe having a resin concrete layer as an intermediate layer are used. The tubular body 2 has an insertion portion 2a having a rubber packing attached at one end and a receiving portion 2b having a diameter slightly larger than that of the main body at the other end. The tube portions 2 having the same diameter can be connected by the insertion portion 2a and the receiving portion 2b.

The jig 3 is configured by attaching a plurality of wheels 4 and locking members 5 to the outer peripheral surface of a belt-shaped member 6 formed of a flexible steel plate or synthetic resin plate. And this belt-shaped member 6
Are fixed in an annular shape along the circumferential direction of the tubular body 2.

The wheel 4 is made of rubber, plastic, casting, steel or the like. The wheel 4 has a shaft supported by a bearing plate 12.
The bearing plate 12 is attached to the outer peripheral surface of the belt-shaped member 6 via a connecting rod 14. The bearing plate 12 may be directly attached to the outer peripheral surface of the belt-shaped member 6 without the connecting rod 14. Further, as the wheels 4, spherical wheels may be used instead of so-called rolling wheels. Furthermore, these plural wheels 4
The mounting positions may be equidistant on the outer peripheral surface of the strip-shaped member 6, but they may be mounted at a large number on the portion corresponding to the tube bottom. In addition, by interposing an elastic body such as a spring between the wheel 4 and the belt-shaped member 6, the wheel 4 is made to correspond to the unevenness or the like generated on the inner peripheral surface of the existing pipe 15 so that the embedded pipe 1 can be inserted smoothly. Can be In addition, the wheel 4 supports the embedded pipe 1 in the existing pipe by a rod-shaped body having a spherical tip,
Any support that can move in the existing pipe may be used. This support is preferably adapted to adjust the height of protrusion with respect to the belt-shaped member 6.

The locking member 5 is attached to the tip of a locking shaft 5a attached to the outer peripheral surface of the belt-shaped member 6. The locking member 5 is composed of a spring plate that is open outward and is formed in a concave shape in accordance with the outer peripheral shape of the axial reinforcing bar 8. By pushing the axial reinforcing bar 8 from the outside, the locking member 5 is pressed. 8 is elastically supported.

The reinforcing bar 7 is an axial reinforcing bar 8 having a length substantially the same as the length of the tubular body 2.
And a circumferential reinforcing bar 9 processed into a ring shape. The axial reinforcing bar 8 is elastically supported by the locking member 5 and
Are arranged in the longitudinal direction. The circumferential reinforcing bars 9 are fitted in the outer peripheral portion of the axial reinforcing bars 8 and arranged in the circumferential direction of the tubular body 2. The axial reinforcing bar 8 and the circumferential reinforcing bar 9 are bound together by a reinforcing bar binding line (not shown). Further, a socket 10 for connecting a reinforcing bar is joined to one end of the axial reinforcing bar 8 by welding or the like.

Next, a method of constructing the buried pipe 1 will be described.

First, as shown in FIG. 2, the buried pipe 1 is carried down by the crane 17 into the pit 16 provided in the opening of the existing pipe 15. Next, the buried pipe 1 is pushed into the existing pipe 15. At this time, since the buried pipe 1 is supported by the wheels 4, it can be easily pushed into the existing pipe 15.
Thereafter, similarly, the buried pipe 1 is carried down to the pit 16 of the existing pipe 15 and pushed into the existing pipe 15. As a result, as shown in FIGS. 3 and 4, the tubular body 2 is integrated with the receiving portion 2a provided on the tubular body 2 and the inserting portion 2b. On the other hand, the reinforcing bars 7 are integrally connected by inserting the axial reinforcing bars 8 of the other buried pipe 1 into the reinforcing bar binding socket 10 provided on one of the axial reinforcing bars 8. In this state, the buried pipe 1 is in a state in which the reinforcing bars 7 are arranged in the gap between the buried pipe 1 and the existing pipe 15. Then, concrete 18 is poured and solidified in the gap between the buried pipe 1 and the existing pipe 15. As a result, a new pipe having a reinforced concrete structure can be easily formed in the existing pipe.

The locking member 5 in the present invention is not limited to that of this embodiment, and may be one as shown in FIGS. 5 (a) to (d). That is, in FIG. 5A, a flat plate-shaped locking member 20 is provided upright on the outer peripheral surface of the belt-shaped member 6, and the axial reinforcing bar 8 is inserted into the groove 20a provided on the outer peripheral edge of the locking member 20. It was done like this. In FIG. 5 (b), a spring plate 21 for locking the axial reinforcing bar 8 is directly provided on the outer peripheral surface of the strip-shaped member 6 so that the axial reinforcing bar 8 can be arranged in a state of being in contact with the strip-shaped member 6. It is a thing. In FIG. 5 (c), a hook-shaped protrusion 22 is provided on the outer peripheral surface of the strip-shaped member 6, and the axial reinforcing bar 8 is arranged on the hook-shaped protrusion 22. In Fig. 5 (d), the height of the locking shaft 5a is changed so that two different concentric circles are provided.
The axial reinforcing bars 8 and the circumferential reinforcing bars 9 can be arranged in the steps.

(Effect of the invention) As described above, according to the present invention, the reinforcing bar can be securely, easily and optimally attached to the optimum position by the locking member, and the embedded pipe can be inserted concentrically into the existing pipe. Since the reinforcing bars can be evenly arranged between the existing pipe and the existing pipe, the pipe line suitable for the target strength can be optimally and economically constructed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 to FIG. 5 show the drawings of the present invention, FIG. 1 (a) is a side view showing the outline of the entire construction of a buried pipe, and FIG. 1 (b) is a first view. FIG. 2A is a sectional view taken along line II in FIG. 2A, and FIG. 2 is an explanatory view showing a state in which the buried pipe is carried down into the pit.
The figure is an explanatory view showing a state in which the buried pipe is inserted into the existing pipe, FIG. 4 (a) is a partially cutaway side view of a main part showing a state in which the buried pipe is inserted into the existing pipe, and FIG. Fig. 4 (a) is a cross-sectional view taken along the line IV-IV, Fig. 4 (c) is an enlarged view of a portion surrounded by a chain line in Fig. 4 (a), and Fig. 5 (a)-
(D) is a front view and a cross-sectional view showing a modified example of the locking member with a part thereof omitted. 1 …… Embedded pipe in existing pipe, 2 …… Tube 3 …… Jig, 4 …… Wheel (support tool) 5 …… Locking member, 7 …… Reinforcing bar 15 …… Existing pipe

Claims (1)

[Claims] 1. An annular jig having a locking member for locking a reinforcing bar and a support tool for supporting the tubular body is provided in the circumferential direction of an outer peripheral surface of the tubular body inserted into an existing pipe. A pipe embedded in an existing pipe, wherein reinforcing bars are arranged in the axial direction and the circumferential direction of the pipe body via locking members.