JP3403340B2 - Renewal shield method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rehabilitation shield construction method as a pipe rehabilitation construction method for rehabilitating sewerage facilities that have passed their useful lives or are deteriorated.

[0002]

2. Description of the Related Art Sewer pipes are designed on the basis of a flow velocity that allows sediment to flow smoothly (scavenging) to a treatment site without depositing sediment, but in many pipes sediments have existed over the years. It was confirmed that this deposit has various effects on maintenance such as obstruction of downflow capacity, generation of odor, damage to pipes by corrosive substances (hydrogen sulfide, etc.), and contamination of water source by overflow water during rainy days. Is causing problems.

Various measures can be considered for the rehabilitation of such an aged sewer pipe, but the water in the sewer pipe is stopped by a packer (stop cock) or the like so that the construction portion is in a dry state. There are many things to repair.

[0004] The repair content includes manual scrubbing and injection of a water blocking material, sticking a resinous reinforcing material impregnated with a curable resin into a pipe, and others. In any case, the work efficiency is poor due to the water stoppage,
In addition, when workers enter the pipe to work, it is necessary to take measures against oxygen deficiency and flood. In particular, when the diameter of the pipe is large, it becomes large.

On the other hand, SP is a rehabilitation method that can be applied while flowing down and can be applied to large diameters.
There are construction methods called R construction method and super SPR construction method.

[0006] As shown in Fig. 11, this is a pipe making machine 2 set in an existing human hole 1, and a profile 3 (Fig. 12) continuously supplied from the ground is meshed to form a spiral rehabilitation pipe. While forming 4, the inner pipe 5 is fed to the next human hole. Next, a special backing material is injected into the space between the existing pipe and the rehabilitation pipe 4 to form a new composite pipe integrated with the existing pipe. The profile 3 is an extruded body of vinyl chloride resin and is a continuous body having ribs with a one-beam structure.

The difference between the SPR construction method and the super SPR construction method is that the SRR construction method is suitable for small and medium diameters, whereas the super SPR construction method combines a profile 3 with a W-shaped or U-shaped steel reinforcing material 6, Later, the rigidity of the pipe was further improved and it was possible to apply it to a relatively large diameter.

[0008]

According to the SPR method and the super SPR method, the construction can be carried out while flowing the sewage, so that it is most suitable at the site where the sewage cannot be turned around. Since the new small diameter rehabilitation pipe 4 is created by the profile 3 without completely changing the existing pipe, the size is greatly reduced.

The present invention eliminates the inconveniences of the conventional example, and enables construction while flowing sewage into the mine, and cuts and removes deposits and damaged parts and performs new lining including the removed parts. Therefore, it does not need to be significantly reduced in diameter, and moreover,
The purpose of the present invention is to provide a renewal shield construction method that enables continuous work with a shield machine similar to the shield construction method at the time of new construction, and can obtain efficient and rational construction.

[0010]

In order to achieve the above-mentioned object, the present invention has a rotary crushing device capable of squeezing an existing tunnel from the inside, and also has a water channel that opens at the front end and extends in the front-rear direction. A shield machine with the tip intake port of the vacuum-type cutting sludge discharge pipe that is located outside this waterway is opened near the rear of the rotary crusher, and the crusher of the existing tunnel is used to clean the lining part of the existing tunnel. While advancing, the shield machine is moved forward, water in the existing tunnel is taken into the water channel, and a temporary water pipe that connects to the water channel is assembled. The gist is to apply a new lining to the rear part and to divide the shield machine into a front part and a tail part so that they can be flexibly fitted to each other.

According to the first aspect of the present invention, the rotary crushing device of the shield machine is used to scrape the existing tunnel from the inside to cut the deposits and the damaged portions, and the cutting sludge is a vacuum type cutting sludge discharge pipe. Is sucked from the tip intake port and sent to the rear. Also, as the shield machine advances, a temporary water pipe connected to the inside of the shield machine is assembled behind it, and the water in the existing tunnel is flowed to this water pipe and a new lining is applied outside it. .

According to the second aspect of the present invention, the shield machine is divided into the front portion and the tail portion, and the two portions are flexibly fitted to each other. Therefore, even if the existing tunnel is bent. It can cope with this sufficiently.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. Fig. 1 is a vertical sectional side view of a sewer pipe for carrying out the renewal shield method of the present invention, Figs.
FIG. 5 is a vertical side view of each step showing one embodiment of the renewal shield construction method of the present invention. In FIG. 1, 7 is a manhole on the starting side, 8 is a manhole on the arriving side, and 9 are these manholes 7, 8 in FIG. An existing tunnel that connects the two, which is often a shield tunnel in the shield construction method, in which case it consists of a primary lining with segments and a secondary lining with inner wrapping concrete.

As a start preparation work in such a sewer pipe, as shown in FIG. 2, an earth retaining wall 10 is installed around the upper part of the manhole 7 on the start side, and the inside of the earth retaining wall 10 is excavated to cover the lining plate 11. Road lining by the manhole 7 on the starting side
Remove the upper part of the machine to secure the necessary openings by loading the machine and materials.

Then, as shown in FIG. 3, the temporary packer
12a and 12b are installed near the entrance and exit of the existing tunnel 9 of the manhole 7, the running water inside the manhole 7 is stopped temporarily, the machine stand 13 is installed, and the shield machine 14 is installed on it.

As shown in FIG. 7, the shield machine 14 is divided into a front portion 14a and a tail portion 14b, and the front portion 14a and the tail portion 14b are flexibly fitted to each other.
A center folding device 15 by means of a jack is provided between them. As shown in FIG. 8, the center folding device 15 is composed of a jack 16 whose ends are connected to the front portion 14a side and the tail portion 14b side by pins, but the jack 16 itself has a large stroke width for forward / backward movement. It can be used as a jack, and the fitting length of the front portion 14a and the tail portion 14b can be increased correspondingly.

Further, the shield machine 14 is provided with a rotary crushing device 17 in which an excavating bit 17b is provided at the tip of a telescopic leg 17a so that an existing tunnel can be picked up from the inside, and further, it is opened at the front end in the front-rear direction. An inwardly extending waterway 18 was formed.
The opening at the front end of this water channel 18 is formed at the front end of the front portion 14a, and a sealing brush 19 as a sealing member corresponding to a tail brush of a normal shield machine is provided around the opening. The end was made to contact the inside of the existing tunnel 9.

The front part 14a and the tail part of the shield machine 14
14b are provided with grippers 20a and 20b facing outward, respectively. The grippers 20a and 20b also have expandable legs as an example like the rotary crushing device 17, and a clip portion that abuts the inside of the existing tunnel 9 is provided at the tip thereof.
In the figure, 21 is a man rock.

A vacuum type cutting scrap discharge pipe 22 is provided outside the water channel 18, and a tip intake port 22a thereof is opened near the rear of the rotary crushing device 17. This cutting scrap discharge pipe 22
Does not necessarily have to integrally form the main body of the shield machine 14.

As a means for loosely fitting and connecting to the water passage 18, a temporary water pipe 23 made of a steel ring or segment was assembled, and a tail brush 24 abutting against the water pipe 23 was provided at the tail portion 14b. Although not shown, the shield machine 14 has an erector for assembling the water supply pipe 23 and an erector for assembling the formwork for the new lining.

Temporary packer from Manlock 21 shown in FIG.
12a is removed, the water in the existing tunnel 9 is taken into the water channel 18 as shown in FIG. 4, and the shield machine 14 is moved forward while feeding this into the temporary water pipe 23, and at the same time the rotary crushing device 17
Then, the secondary lining section of the existing tunnel 9 is removed.

The cutting misalignment caused by this picking is the cutting misalignment discharge pipe.
It is discharged to the rear at 22 and a new lining (lining) is applied to the fragrance area (secondary lining removal area).

As such a new lining, as shown in FIG. 9, a highly durable secondary lining made of inner wound concrete in which an inner formwork 25 is assembled and resin concrete 26 is placed,
This is done by assembling a synthetic resin panel made of urethane and injecting a backfill injection material such as urethane foam. In any of these cases, a new highly durable lining (strength member) can be reconstructed inside the existing primary lining. The inner formwork 25 may be replaced with another synthetic resin panel, and the resin concrete 26 may be replaced with another backfilling injection agent.

The forward movement of the shield machine 14 begins with the tail portion 14
The gripper 20b of b is extended to fix the tail portion 14b, and the jack 16 is extended to make the tail portion 14b a reaction force to advance the front portion 14a. At this time, the gripper of the front part 14a
Leave 20a free.

When the forward movement of the front portion 14a is completed,
Extend the gripper 20a of the front part 14a to extend the front part 14a.
a is fixed, the gripper 20b of the tail portion 14b is made free, and the jack 16 is contracted to pull the tail portion 14b by using the front portion 14a as a reaction force.

After that, the same steps are repeated to advance in the scale insect type.

As another embodiment, as shown in FIG. 10, a propulsion jack 27 may be provided and the new lining portion may be used as a reaction force to advance the shield machine 14 by the propulsion jack 27.

Even when the existing tunnel 9 is curved, assuming that there are a plurality of jacks 16 in the circumferential direction of the tunnel, only a part of the jack 16 can be greatly expanded, or it can be expanded or contracted. The front portion 14a and the tail portion 14b are bent so that the curve can be dealt with.

When the manhole 8 is reached as shown in FIG. 5, the shield pipe 14 is removed while sequentially dismantling the water pipe 23.
Is moved backwards, and is retreated to the manhole 7 on the starting side to be dismantled and removed. As shown in FIG. 6, the removed portion of the manhole 7 is reconstructed and backfilling 28 is performed to restore the ground surface.

[0030]

As described above, according to the renewal shield method of the present invention, it is possible to perform the construction while flowing the sewage into the mine, and at the same time, a new lining is constructed by cutting and removing deposits and damaged parts. By applying, it is possible to avoid a large diameter reduction.

Further, the continuous work by the shield machine is possible like the shield construction method at the time of new construction, and efficient and rational construction can be obtained.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a sewer pipe for carrying out a renewal shield method of the present invention.

FIG. 2 is a vertical sectional side view of a first step showing one embodiment of the renewal shield construction method of the present invention.

FIG. 3 is a vertical sectional side view of a second step showing an embodiment of the renewal shield construction method of the present invention.

FIG. 4 is a vertical sectional side view of a third step showing an embodiment of the renewal shield construction method of the present invention.

FIG. 5 is a vertical sectional side view of a fourth step showing the embodiment of the renewal shield method of the present invention.

FIG. 6 is a vertical sectional side view of a fifth step showing an embodiment of the renewal shield construction method of the present invention.

FIG. 7 is a vertical cross-sectional side view showing details of a starting stage showing an embodiment of the renewal shield construction method of the present invention.

FIG. 8 is a vertical cross-sectional side view showing the fitting between the front portion and the tail portion of the shield machine.

FIG. 9 is a vertical sectional side view showing details of an intermediate stage showing one embodiment of the renewal shield construction method of the present invention.

FIG. 10 is a vertical cross-sectional side view showing details of an intermediate stage showing another embodiment of the renewal shield construction method of the present invention.

FIG. 11 is a vertical sectional side view of a conventional example.

FIG. 12 is an end view of a profile in a conventional example.

[Explanation of symbols]

1 ... Existing human hole 2 ... Pipe making machine 3 ... Profile 4 ... Rehabilitation pipe 5 ... Existing pipe 6 ... Steel reinforcement 7, 8 ... Manhole 9 ... Existing tunnel 10 ... Earth retaining wall 11 ... Lining plate 12a, 12b ... Temporary packer 13 ... Machine stand 14 ... Shielding machine 14a ... Front part 14b ... Tail part 15 ... Folding device 16 ... Jack 17 ... Rolling and crushing device 17a ... Expanding leg 17b ... Excavation bit 18 ... Water channel 19 ... Brushes for sealing 20a, 20b …
Gripper 21 ... Man-lock 22 ... Cutting drainage pipe 22a ... Intake port 23 ... Water pipe 24 ... Tail brush 25 ... Inner formwork 26 ... Resin concrete 27 ... Propulsion jack 28 ... Backfilling

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masayu Nakagawa 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Masatsugu Yamamoto 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Toyofumi Ikematsu 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Katsumi Shimizu 6-3-2 Toyo, Koto-ku, Tokyo Kashima Construction Kanto Branch Co., Ltd. (56) Reference Japanese Unexamined Patent Publication No. 11-159278 (JP, A) Actual Development 4-1-222797 (JP, U) Actual Development 4-122798 (JP, U) Actual Development 2-58086 ( (58) Fields surveyed (Int.Cl. ⁷ , DB name) E21D 9/06 301 F16L 1/024

Claims (2)

(57) [Claims] 1. A vacuum type crushing device having a rotary crushing device capable of picking up an existing tunnel from the inside, forming a water channel that opens at the front end and extends in the front-rear direction, and is arranged outside this water channel. We installed a shield machine with the tip intake port of the cutting sludge discharge pipe open near the rear of the rotary crusher, and while rotating the crusher to scratch the lining of the existing tunnel, move the shield machine forward and set the existing tunnel in the waterway. Assemble a temporary water pipe that takes in the water inside and connect it to the water channel and let it flow into this.In addition, the scraps of the shavings should be discharged to the rear by the shaving discharge pipe, and a new lining should be applied to the scavenging point. The characteristic renewal shield construction method. 2. The renewal shield construction method according to claim 1, wherein the shield machine is divided into a front part and a tail part, and the two parts are flexibly fitted to each other.