JP4874130B2 - Reconstruction promotion method and remodeling promotion device used for the method - Google Patents

Description

    The present invention relates to a renovation promotion method for reconstructing a sewer pipe that is an existing pipe into a new pipe, and a renovation promotion device used in the method.

    Conventionally, existing sewer pipes have been remodeled to new pipes for various reasons such as increasing the flow of sewage, improving seismic strength, and measures against aging. It has been proposed (see, for example, Patent Document 1).

    FIG. 7 is a longitudinal sectional view showing an example of a conventional construction method (reconstruction promotion construction method) for remodeling a sewer pipe, and reference numeral 100 denotes a sewer pipe buried in the ground (existing pipe). Reference numeral 101 denotes a crushing apparatus for crushing the existing pipe 100, and reference numeral 102 denotes a new pipe newly constructed in place of the existing pipe 100. The crushing apparatus 101 includes a guide part 101a that is movably disposed in the existing pipe 100, a connection mechanism 101b that is connected to the guide part 101a, a cutter 101d that is rotatably supported by a rotor 101c, Driving means 101e for rotating the cutter 101d, the propulsion path is defined by the guide portion 101a, and the existing pipe 100 is crushed by the cutter 101d.

Such a reconstruction promotion method does not need to dig up the ground like the open-cut method,
・ Pipes buried across rivers and main roads,
・ It has the feature that it can be relatively easily remodeled, such as pipes in the vicinity of other buried objects, pipes buried in deep places.
Japanese Patent Publication No. 08-19827

    By the way, there are not a few existing pipes that meander or sag due to water leakage or the like. However, like the above-described crushing apparatus 101, the guide part 101a moves in the existing pipe 100. Then, the meandering and sagging of the existing pipe may occur as the existing pipe meandering and sagging. In order to reduce such meandering, a universal joint (not shown) is interposed between the guide portion 101a and the rotor 101c, but this has not been a fundamental solution.

    An object of this invention is to provide the reconstruction promotion construction method and reconstruction promotion apparatus which can construct | assemble a new pipe without meandering.

The invention according to claim 1 is illustrated in FIG. 1 and is a renovation promotion for crushing an existing pipe sewer pipe (1) with a crushing means (21) and remodeling it into a new pipe (3). In the construction method,
Constructing a guide pipe (5) for defining the propulsion path (4) of the crushing means (21) inside the existing pipe (1);
A step of fixing the guide tube (5) by filling a filler (6) between the outer surface of the guide tube and the inner surface of the existing tube;
While the sliding means (20) connected to the crushing means (21) is inserted into the guide tube (5), the crushing means (21) is propelled along the guide pipe (5) while the existing means is installed. Crushing the tube (1) together with the guide tube (5);
And a step of constructing a new pipe (3) in the hollow part (7) formed by the crushing.

    According to a second aspect of the present invention, in the first aspect of the present invention, sewage is already installed by a sewage flow passage (see reference numeral 20c in FIG. 2) formed in the guide pipe (5) and the sliding means (20). It is characterized by flowing down from the pipe side to the new pipe side.

The invention according to claim 3 is illustrated in FIG. 2, and in the renovation propulsion device (2) for crushing the existing pipe (1),
Crushing means (21) for crushing the existing pipe (1);
A guide pipe (5) constructed inside the existing pipe (1) along the propulsion path (4) of the crushing means (21);
A filler (6) filled between the outer surface of the guide tube (5) and the inner surface of the existing tube (1) to fix the guide tube (5);
Sliding means (20) slidably disposed inside the guide tube (5);
Connecting means (22) for connecting the crushing means (21) and the sliding means (20);
With
The propulsion path (4) of the crushing means (21) is defined by the guide pipe (5) and the sliding means (20).

The invention according to claim 4 is the invention according to claim 3, wherein the sliding means (20) includes a partition wall portion (20a) disposed so as to close the guide tube (5), and the guide tube ( 5) a first downflow passage (20c) formed so as to penetrate the partition wall (20a) in a direction along the axis of 5),
The connecting means (22) has a second downstream path (22a) communicating with the first downstream path (20c),
The sewage from the guide pipe (5) is configured to flow through the first flow down path (20c) and the second flow down path (22a).

    Note that the numbers in parentheses are for the sake of convenience indicating the corresponding elements in the drawings, and therefore the present description is not limited to the descriptions on the drawings.

    According to the invention which concerns on Claim 1 and 3, even if it is a case where the existing pipe meanders, the new pipe of a state without meandering and slack can be constructed | assembled. In addition, since the existing pipe is not used as a guide, a new pipe can be constructed regardless of the damage of the existing pipe. Furthermore, since the guide tube is fixed by the filler, vibration when crushing by the crushing means is suppressed, and the guide tube can be crushed smoothly.

    According to the invention which concerns on Claim 2 and 4, since a guide pipe | tube is utilized also as a sewage flow down pipe, an operation | work can be simplified compared with the case where a sewage flow down pipe is laid separately.

    The best mode for carrying out the present invention will be described below with reference to FIGS. Here, FIG. 1 is a longitudinal sectional view for explaining the reconstruction promotion method according to the present invention, and FIG. 2 is a detailed sectional view showing an example of the structure of the reconstruction promotion apparatus according to the present invention. 1 is a cross-sectional view taken along line AA in FIG. 1, FIG. 4 is a cross-sectional view taken along line BB in FIG. 1, FIG. 5 is a cross-sectional view taken along line CC in FIG. FIG. 2 is a cross-sectional view taken along the line DD in FIG. 1.

As shown in FIG. 1, the reconstruction promotion method according to the present invention is a method for crushing an existing pipe sewer pipe 1 with a crushing means 21 and reconstructing it into a new pipe 3.
A step of constructing a guide pipe 5 for defining the propulsion path 4 of the crushing means 21 inside the existing pipe 1;
A step of fixing the guide tube 5 by filling a filler 6 between the outer surface of the guide tube and the inner surface of the existing tube;
In a state where the sliding means 20 connected to the crushing means 21 is inserted into the guide tube 5, the existing pipe 1 is crushed together with the guide pipe 5 while propelling the crushing means 21 along the guide pipe 5. And the process of
A process of constructing the new pipe 3 in the cavity 7 formed by the crushing;
It has. According to the present invention, instead of using the existing pipe itself as a guide as in the conventional device, the newly constructed guide pipe 5 is used as a guide separately from the existing pipe, so that the existing pipe 1 is meandering. Even in this case, it is possible to construct the new tube 3 without meandering or sagging. Further, since the existing pipe 1 is not used as a guide, the new pipe 3 can be constructed regardless of the damage of the existing pipe 1 or the like. Furthermore, since the guide tube 5 is fixed by the filler 6, vibration (radial shake) when crushed by the crushing means 21 is suppressed, and the guide tube 5 can be crushed smoothly.

    In this case, a sewage flow down path (see reference numeral 20c in FIG. 2) is formed in the sliding means 20, and the sewage flows down from the existing pipe side to the new pipe side by the guide pipe 5 and the sewage flow down path 20c. This is good (details will be described later).

    By the way, since the guide tube 5 used in the present invention is fixed by being filled with the filler 6 in the periphery thereof, the guide tube 5 itself does not need to have a high strength. Rather, in order for the crushing by the crushing means 21 to be performed smoothly, it is preferable that the strength is low. Specifically, a PVC pipe is preferable.

In addition, as the filler 6,
・ Materials with excellent filling properties ・ Materials with little volume change (volume shrinkage) before and after curing ・ Materials with low strength should be used. Muddy water is used for cutting (crushing) by the crushing means 21, but it is necessary that the muddy water is filled without any gaps so that it does not enter (parts filled with the filler 6). Further, since the muddy water is circulated and used, it is preferable to use the filler 6 having a property that does not deteriorate the properties of the muddy water. Furthermore, an additive for promoting crushing (cutting) may be added to the filler 6.

The work of fixing the guide tube 5 is as follows:
A process for carrying the guide pipe 5 into the existing pipe. A process for temporarily fixing the guide pipe 5 with a positioning jig (not shown) along the axis of the new pipe 3 to be constructed (see reference numeral 8). This is done by performing a step of filling the filler 6 between the outer surface of the tube and the inner surface of the existing tube.

In the present invention,
Crushing means 21 for crushing the existing pipe 1;
A guide pipe 5 constructed inside the existing pipe 1 along the propulsion path 4 of the crushing means 21;
A filler 6 filled between the outer surface of the guide tube 5 and the inner surface of the existing tube 1 to fix the guide tube 5 (see FIGS. 3 and 4);
Sliding means 20 slidably disposed inside the guide tube 5;
A connecting means 22 for connecting the crushing means 21 and the sliding means 20;
Thus, the propulsion device 2 is configured, and the propulsion path 4 of the crushing means 21 is defined by the guide tube 5 and the sliding means 20.

As shown in FIG.
A partition wall 20a disposed so as to close the guide tube 5;
A seal portion 20b formed on a portion of the outer periphery of the partition wall portion 20a that is in contact with the inner wall of the guide tube 5;
A first downflow passage 20c formed so as to penetrate the partition wall portion 20a in a direction along the axis of the guide tube 5;
It is good to form. The connecting means 22 is provided with a second downstream path 22a that communicates with the first downstream path 20c, and sewage from the guide pipe 5 flows into the first downstream path 20c and the second downstream path. It is preferable to flow along the path 22a. Furthermore, it is preferable that the third downstream path 23 is communicated with the downstream side of the second downstream path 22a. In other words, the sewage flow method in the present invention is a pipe flow method, and sewage flows through the guide tube 5, but the partition wall portion 20 a and the seal portion 20 b are configured to close the guide tube 5. Therefore, on the downstream side of the sliding means 20, the sewage does not flow through the guide pipe 5 but flows from the first flow down path 20 c to the third flow down path 23. In this case, since the guide pipe 5 is also used as a sewage flow down pipe, the work can be simplified as compared with the case where a separate sewage flow down pipe is laid.

    On the other hand, the crushing means 21 includes a cutter part (cutter bit; see FIG. 5) 21a that is in contact with the end surfaces of the existing pipe 1 and the guide pipe 5, and a driving means (FIG. 5) for driving the cutter part 21a. 6), and the existing tube 1 and the guide tube 5 are crushed simultaneously.

    In addition, the new pipe 3 may be laid using the thrust of a jack (not shown) (jack installed in a vertical shaft).

    In the case of the above-described remodeling propulsion apparatus, the guide pipe 5 without meandering or the like serves as a guide. Therefore, the hollow part 7 without meandering or the like is provided between the sliding means 20 and the crushing means 21 without using a universal joint. Although it can be formed, it does not exclude from the scope of the present invention that a universal joint is interposed.

    By the way, in FIG. 1, the axis of the guide tube 5 (see symbol 4) and the axis of the new tube 3 (see symbol 8) are coincident, but the axes are not coincident (deviation). Is not excluded from the scope of the present invention.

    Further, in the construction method shown in FIG. 1, the guide pipe 5 itself functions as a sewage flow down pipe, but a pipe dedicated to the sewage flow down may be arranged inside the guide pipe 5.

FIG. 1 is a longitudinal sectional view for explaining a reconstruction promotion method according to the present invention. FIG. 2 is a detailed cross-sectional view showing an example of the structure of the reconstruction propulsion apparatus according to the present invention. 3 is a cross-sectional view taken along the line AA in FIG. 4 is a cross-sectional view taken along the line BB in FIG. 5 is a cross-sectional view taken along the line CC of FIG. 6 is a cross-sectional view taken along the line DD of FIG. FIG. 7 is a longitudinal sectional view showing an example of a conventional construction method (reconstruction promotion construction method) for remodeling a sewer pipe.

Explanation of symbols

1 Existing pipe (sewer pipe)
DESCRIPTION OF SYMBOLS 2 Reconstruction propulsion apparatus 3 New pipe 4 Propulsion path 5 Guide pipe 6 Filler 7 Cavity part 20 Sliding means 20a Partition part 20c 1st downflow path 21 Crushing means 22 Connecting means 22a 2nd downflow path (downstream flow)

Claims (4)

In the reconstruction promotion method that crushes existing sewer pipes with crushing means and rebuilds them into new pipes,
Constructing a guide pipe for defining a propulsion path of the crushing means inside the existing pipe;
A step of fixing the guide tube by filling a filler between the outer surface of the guide tube and the inner surface of the existing tube;
With the sliding means connected to the crushing means inserted into the guide tube, the step of crushing the existing pipe together with the guide pipe while propelling the crushing means along the guide pipe;
A process of constructing a new pipe in the cavity formed by the crushing;
Renovation promotion method characterized by having The sewage is caused to flow down from the existing pipe side to the new pipe side by a sewage flow downway formed in the guide pipe and the sliding means.
The reconstruction promotion construction method according to claim 1. In the renovation propulsion device for crushing existing pipes,
Crushing means for crushing the existing pipe;
A guide pipe constructed inside the existing pipe so as to follow the propulsion path of the crushing means;
A filler filled between the outer surface of the guide tube and the inner surface of the existing tube to fix the guide tube;
Sliding means slidably disposed inside the guide tube;
Connecting means for connecting the crushing means and the sliding means;
With
A propulsion path of the crushing means is defined by the guide tube and the sliding means;
Reconstruction propulsion device characterized by that. The sliding means includes a partition portion disposed so as to close the guide tube, and a first downflow passage formed so as to penetrate the partition portion in a direction along the axis of the guide tube. Have
The connecting means has a second downstream path communicated with the first downstream path,
The sewage from the guide pipe is configured to flow through the first downflow path and the second downflow path,
The reconstruction propulsion device according to claim 3.

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