JPH04105198U - Jacket for shield method - Google Patents

Abstract

(57) [Summary] (with amendments) [Purpose] To obtain a jack for shield construction that can be freely inserted and pulled out even in narrow gaps, and that has minimal movement resistance and minimal movement resistance of secondary lining pipes. purpose. [Structure] A frame 4 having rollers 3 that abuts along the outer surface of the secondary lining is attached to a sled body 2 that is movable along the axial direction of the pipe on the inner surface of the primary lining. It is attached so that it can move in parallel only in the vertical direction with respect to the surface of the sled body, and a telescopic bag 5 that can be expanded and contracted is inserted between the frame and the surface of the sled body. The secondary lining pipe is supported via the rollers.

Description

[Detailed explanation of the idea] [Industrial application field]

This invention relates to an improvement of a jack for shield construction method.

0002

[Conventional technology]

Traditionally, when constructing large-scale sewage pipes, etc., trenches were dug directly underground due to environmental issues in the surrounding area. A shield construction method is often used in which a conduit is formed as it progresses. In this shield construction method, a secondary lining is applied after the primary lining to ensure that the pipe has the required diameter. In some cases, piping may be necessary.

0003 By the way, in the above shield construction method, when performing secondary lining after primary lining, In this case, it is necessary to increase the effective diameter of the pipe, so the outer diameter of the pipe used in the secondary lining should be as large as possible. It is preferable to use a concrete pipe, and for this reason it is necessary to As a jig, it can be expanded and contracted using air or liquid pressure, and can be inserted into narrow gaps. Use an air jack or water pressure jack to connect the inner surface of the primary lining and the outer surface of the secondary lining pipe. An interposition is made between the two.

0004

[Problems with conventional technology]

However, the conventional air jack or hydraulic jack described above cannot Although it is said that it is possible to move along the Since movement was not allowed, the pipe was inflated to support the secondary lining pipe and was not moved. may become impossible, making minute movement adjustments during pipe installation extremely difficult, and When it is shrunk and removed after use, the pull-out resistance increases due to contact friction with the outer surface of the secondary lining pipe. There was a downside to getting bigger.

[0005]

[Problem that the idea aims to solve]

In view of the above-mentioned problems, this idea enables minute movement of the secondary lining pipe and also allows for The purpose is to provide a jack for shield construction method that is easy to move during excavation. It was made by

[0006]

[Means to solve the problem]

That is, the jack for shield construction method of this invention has the pipe axis on the inner surface of the pipe of the primary lining. The sled body, which is movable along the direction, comes into contact with the outer surface of the secondary lining pipe. A frame having rollers is mounted so as to be movable in parallel only in the perpendicular direction to the surface of the sled body. An expandable and contractible bag is inserted between the frame and the surface of the sled body. It is characterized by:

[0007]

【Example】

Next, this invention will be explained using examples. Fig. 1 is a side view of an embodiment of this invention, Fig. 2 is a plan view of the embodiment, and Fig. 3 is a storage of the embodiment. FIG. 4 is a side view when it is retracted, and FIG. 4 is a sectional view showing the usage state of the embodiment.

[0008] The jack 1 for shield construction method of this invention has the following features: The sled body 2, which is movable along the axial direction of the pipe P, is attached to the pipe Q of the secondary lining (Fig. 4) The frame 4 with the rollers 3...3 in contact along the outer surface is perpendicular to the surface of the sled body 2. It is mounted so that it can be moved in parallel only in the vertical direction, and there is an expansion plate between the frame 4 and the surface of the sled body 2. , a retractable telescopic bag 5 is inserted therein. Note that 6 in the figure indicates a link connecting the frame 4 and the sled body 2, and the link between the frame 4 and the sled body 2 is The respective welded metal fittings 6A...6A and the wire connecting these metal fittings 6A...6A It is composed of a rope 6B. Further, 5A and 5B indicate pipes for injecting and discharging the elastic bag 5.

[0009]

[Effect]

In the shield method, when performing secondary lining, the sled body 2 is aligned as shown in Figure 4. The secondary lining pipe 7 is placed along the inner surface of the secondary lining P, and the secondary lining pipe 7 is placed on the main transport trolley 8. After positioning, the elastic bag 5 is inflated. With this expansion, the frame 4 gradually moves upward, and as shown in Figure 4, the primary lining The pipe 7 for secondary lining is supported inside.

0010 In this state, the pipe 7 is supported by the shield method jack 1. Since rollers 3...3 are interposed between the frame 4 and the secondary lining pipe 7, there is no slight interference when connecting. Small movements are facilitated by these rollers 3...3. After positioning and fixing the secondary lining pipe 7, the expandable bag 5 is deflated. If the supporting state is released, the frame 4 will fit along the surface of the sled body 2 as shown in Figure 3. It can be freely pulled out even within the narrow gap between the primary lining P and the secondary lining Q. becomes possible.

[0011]

【Effect of the invention】

As explained above, this idea is useful when carrying a secondary lining pipe into the primary lining. , a structure in which a frame with rollers is moved up and down using a telescoping bag, and the rollers support the pipe for secondary lining. This makes it extremely easy to move the secondary lining pipe. Also, this The invented shield method jack has a simple structure and is easy to implement. It has practical effects.

0012

[Brief explanation of drawings]

FIG. 1 is a side view of an embodiment of the invention.

FIG. 2 is a plan view of an embodiment of the invention.

FIG. 3 is a side view of the embodiment of the invention during expansion and contraction.

FIG. 4 is a sectional view showing the usage state of the embodiment of the invention.

[Explanation of symbols]

1 Jack for shield method 2 Soli body 3 roller 4 frame 5 Elastic bag

Claims (1)

[Scope of utility model registration request] Claim 1: A frame having rollers that abut along the outer surface of the secondary lining of the pipe is attached to a sled body that is movable along the axial direction of the pipe on the inner surface of the pipe of the primary lining. For use in a shield construction method, the bag is attached to the sled body surface so as to be movable in parallel only in the perpendicular direction, and an expandable and contractible bag is inserted between the frame and the sled body surface. jack. 0001