JP2004169418A - Immersion case and joint method for under water tunnel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an immersion case of a tunnel joint of an immersion tunnel and a shield tunnel and a joint method for an under water tunnel without restriction of ocean condition and without need of placing underwater concrete in the joint of the immersion tunnel and the shield tunnel. <P>SOLUTION: An end wall 2, an opening wall 4, and a partition wall 3 are provided in a cylindrical immersion case 1. After the end wall 2 is forced to penetrate in a shield machine 8, to pass through the opening of the opening wall 4, it is propelled to the vicinity of the partition wall 3. The shield machine 8 is engaged with the opening of the opening wall 4. The gap between the shield machine 8 and the opening is sealed. After water has been drained from the space surrounded by the shield machine 8 and the opening, the partition wall 3 is opened and a cutter part 81 is demolished to enable opening of the immersion tunnel and the shield tunnel. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a structure of a submerged box and a method of connecting a submerged tunnel.
[0002]
[Prior art]
Conventionally, undersea tunnel construction methods that connect airports and other artificial islands with the mainland include a shield construction method in which a tunnel is extended by constructing a lining with a segment at the back for each excavation of the shield machine, In general, a submerged construction method in which a tubular submerged box a constructed in a land-based production yard is towed, submerged on the seabed, and sequentially connected to extend a tunnel.
In addition, construction of the submarine tunnel may be performed using a plurality of construction methods as described above, but the selection of the construction method in such a case, depending on the vertical gradient of the sea bottom and the soil quality and earth covering under the sea bottom, etc. It is determined.
When the shield tunnel and the submerged tunnel are used together, the connection between the shield tunnel and the submerged tunnel is performed by installing a connection box c or the like on the sea floor (see FIG. 7). Alternatively, the boundary between the land and the sea floor is firmly hardened with underwater concrete, excavated from the land with a mountain tunnel method or a closed shield, and connected to a submerged tunnel installed on the sea floor. .
[0003]
[Problems to be solved by the invention]
The above-described conventional connection of the underwater tunnel has the following problems.
<B> When connecting the submerged tunnel and the shield tunnel via a connection box, installation of the connection box requires offshore work such as dredging work and submerging work. Occurs.
<B> When the connection is near the boundary between the sea floor and the land, and the vicinity of the boundary is solidified with underwater concrete, the reliability of the underwater concrete decreases as the depth near the boundary increases.
<C> When the strength of underwater concrete is high, it is difficult to drill holes with a cutter bit of a shield machine.
[0004]
[Object of the invention]
The present invention has been made to solve the above-mentioned conventional problems, and has as its object to provide the following structure of a submerged box and a method of connecting an underwater tunnel.
<B> The connection between the buried tunnel and the shield tunnel should be connected without going through a connection box.
<B> When connecting the submerged tunnel and the shield tunnel, the connection area should be connected without firmly solidifying the underwater concrete.
<C> When connecting the submerged tunnel and the shield tunnel, the work at sea is eliminated, and the construction period is shortened without being restricted by sea conditions.
The present invention achieves at least one of these objects.
[0005]
[Means for Solving the Problems]
In order to achieve the object as described above, the buried box of the present invention is a cylindrical body composed of a ceiling, a floor, and a wall having both ends opened, an end wall having one open end closed, and an inside of the body. A plurality of open walls connected to the ceiling, the floor and the wall, and a plurality of open walls connected to the ceiling, the floor and the wall, and having an opening provided between the end wall and the bulkhead; And a waterproof material provided around the opening of the opening wall, and a shield machine can be engaged with the opening wall.
[0006]
Further, as the water-stopping material of the submerged box, a film-like water-stopping material is housed in a groove provided around the opening of the opening wall, and a fluid is injected into the film of the film-like water-stopping material. In some cases, a submerged box characterized in that the space between the opening of the opening wall and the shield machine engaged with the opening can be made watertight by inflating it.
[0007]
In addition, jacks are provided on a plurality of jack stands connected to the inner surface of the above-mentioned immersion box, and the shield machine penetrating the end wall of the immersion box is fixed by the jack so that the traveling direction can be controlled. In some cases, a submerged box characterized by the following may be used.
[0008]
Further, connecting the submerged tunnel and the shield tunnel, the connection method of the underwater tunnel, the submerged box is installed on the bottom of the water, penetrating the end wall of the submerged box located at the extreme end of the submerged box group, the Propelling the shield machine to the vicinity of the bulkhead of the submerged box, stopping the water between the shield machine and the plurality of opening walls, draining water between the bulkhead and the opening wall, and opening the bulkhead, The method is characterized in that a submerged tunnel and a shield tunnel are opened by dismantling a front cutter portion of the shield machine.
[0009]
Further, in the above-described method of connecting the underwater tunnel, the buried box is installed on the bottom of the water, penetrating through the end wall of the buried box located at the end of the buried box group, up to the vicinity of the partition wall of the buried box. By propelling the shield machine, engaging the shield machine with the plurality of opening walls, and injecting and expanding a fluid in the film of the film-like water blocking material, the shield machine and the plurality of Stopping water between the opening walls, draining water between the partition walls and the opening walls, opening the partition walls, and disassembling the front cutter portion of the shield machine, thereby opening the submerged tunnel and the shield tunnel. May be used.
[0010]
Further, in the above-described method of connecting a submerged tunnel, the shield machine after installing the buried box on the water bottom and penetrating the end wall of the buried box located at the extreme end of the buried box group, is connected to the jack. While controlling the traveling direction, propelling to the vicinity of the partition wall, engaging the shield machine with the plurality of opening walls, injecting a fluid into the film of the film-like water blocking material. By expanding the shield machine, water is stopped between the shield machine and the plurality of opening walls, water is drained between the partition walls and the opening walls, the partition walls are opened, and the front cutter portion of the shield machine is dismantled. In some cases, a method characterized by opening a submerged tunnel and a shield tunnel is used.
[0011]
Further, in the above-described method for connecting a submerged tunnel, after shutting off water between the shield machine and the plurality of opening walls, the injection material is injected into a space surrounded by the shield machine, the opening wall, and the ceiling of the buried box. May be used.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0013]
<A> Buried box The buried box is a cylindrical concrete body consisting of a ceiling, floor and walls, both ends of which are open. A submerged tunnel is constructed by towing a submerged box, setting it down at a predetermined position, and connecting it sequentially.
The submerged box 1 located at the end of the submerged box group is a box connected to the shield machine 8 that has constructed the shield tunnel (see FIG. 1).
The buried box 1 is a cylindrical concrete body composed of a ceiling 11, a floor 12, and a wall 13, and has an end wall 2 closing one open end, a partition wall 3 provided inside the buried box 1, and an opening having an opening. It is a box composed of walls 4 (see FIG. 1).
The end wall 2 is provided at one open end of the immersion box 1 and is connected to the ceiling 11, the floor 12, and the wall 13.
The partition wall 3 is provided inside the immersion box 1, and is connected to the ceiling 11, the floor 12, and the wall 13 similarly to the end wall 2.
A plurality of opening walls 4 are provided between the end wall 2 and the partition wall 3 and are connected to the ceiling 11, the floor 12, and the wall 13.
[0014]
<B> End Wall The end wall 2 is provided at one open end of the immersion box 1 by connecting to the ceiling 11, the floor 12, and the wall 13 of the immersion box 1 (see FIG. 1).
The shield machine 8 penetrates through the end wall 2 and is propelled into the box of the immersion box 1, so that the shield tunnel and the sunk tunnel are connected (see FIG. 2).
For example, the end wall 2 may be partially provided with an opening. In such a case, the water pressure acting on the end wall 2 is applied from both sides of the end wall 2 when the submerged box 1 is installed on the water bottom, and the wall thickness can be reduced as compared with the case where the water pressure acts from one side. it can.
[0015]
<C> Partition wall The partition wall 3 is provided inside the immersion box 1 by being connected to the ceiling 11, the floor 12, and the wall 13 (see FIG. 1).
The partition wall 3 is provided with a drain pipe 31 and a drain valve 32. After the shield machine 8 is engaged in the submerged box 1, water on the end wall 2 side is drained through the drain pipe 32 to make it dry.
[0016]
<D> Opening Wall The opening wall 4 is a plurality of walls provided between the end wall 2 and the partition wall 3 and is provided by connecting to the ceiling 11, the floor 12, and the wall 13 (see FIG. 1).
The opening wall 4 is a wall for engaging the shield machine 8 propelled into the immersion box 1 into the immersion box 1.
The planar shape of the opening includes, for example, a circular shape, an elliptical shape, a rectangular shape, and a shape obtained by partially overlapping two circles. The opening is formed from directly above the floor of the immersion box 1 or from directly above the floor to immediately below the ceiling. May be.
[0017]
<E> Shield Machine The shield machine 8 cuts the ground by a cutter unit 81 provided on the front of the machine, and constructs a lining by a segment 82 at the rear of the machine.
The cutter unit 71 of the shield machine 8 is, for example, a single circular cutter, a multiple mud pressure shield in which a plurality of cutters are meshed like gears and arranged on the same plane, or a cutter head of a plurality of circular shields. There is a multi-face shield where a part is overlapped while shifting back and forth.
[0018]
<F> Water-stop material The water-stop material 5 is provided around the opening of the opening wall 4 over the entire circumference of the opening. The water blocking material 5 is for bringing the shield machine 8 into a watertight state between the opening of the opening wall 4 and the shield machine 8 engaged with the opening after the shield machine 8 is engaged with the opening wall 4. .
Here, the watertight state refers to a state in which the passage of water, such as seawater, is impeded by bringing the waterstop 5 and the surface of the shield machine 8 into close contact.
In the case where a well-known fixed water stop material 5 is used, the water stop material 5 is brought into close contact with the main body surface of the shield machine 8 by engaging the shield machine 8 with the opening wall 4 to exhibit a water stop effect. However, in such a case, when the shield machine 8 passes through the opening of the opening wall 4, the water blocking material 5 may be damaged.
Therefore, as the water stopping material 5 to be used, for example, a film-shaped water stopping material 5a or the like is used in addition to the above-mentioned fixed water stopping material. Such a film-like water blocking material is usually housed in a groove provided around the opening of the opening wall 4. After the shield machine 8 is engaged, for example, a fluid 5b such as air is injected from the inside of the groove via the injection pipe 41, so that the film is expanded and brought into close contact with the surface of the main body of the shield machine 8. The cross-sectional shape of the water-stopping material 5a after the injection of the fluid 5b has, for example, a Ω-shaped cross section (see FIGS. 5A and 5B).
As the water-stopping material 5 and the film-like water-stopping material 5a, for example, a water-swellable rubber or a water-swellable fiber material is used.
[0019]
<G> Jack mount A plurality of jack mounts 6 are provided inside the immersion box 1. Each of the jack stands 6 is connected to the ceiling 11, the floor 12, and the wall 13, and is provided, for example, at a position adjacent to the end wall 2. A jack 7 is attached to the jack base 6, and a shield machine 8 penetrating through the end wall 2 is fixed by the jack 7 to control the traveling direction of the shield machine 8.
The numbers of the jack stands 6 and the jacks 7 differ depending on the shape of the cutter section of the shield machine 8 and the like. For example, in the case of a shield machine in which two cutters are meshed like gears and arranged on the same plane, each cutter is arranged to be fixed at four places, and a total of eight or six jacks are used. A gantry 6 is provided (see FIG. 4).
[0020]
<H> The jack 7 fixes the shield machine 8 penetrating the end wall 2 and controls the traveling direction of the shield machine 8 so that the shield machine 8 can pass through the opening of the opening wall 4. It is provided.
The shield machine 8 that has penetrated the end wall 2 is fixed by the jack 7, and passes through the openings of the plurality of opening walls 4 while controlling the traveling direction of the shield machine 8.
[0021]
<I> Injecting material The injecting material 9 is used in addition to the water-stopping material 5 to further improve watertightness.
The injection material 9 is filled into, for example, a space surrounded by the plurality of opening walls 4, the shield machine 8, the ceiling 11 or the floor 12, and the wall 13 of the submerged box 1 (see FIG. 6).
As the injection material 9, for example, cement grout or a resin material is used.
[0022]
Hereinafter, the method of connecting the underwater tunnel according to the present invention will be described with reference to the drawings.
[0023]
<B> Example 1 of connection method
Sinking box 1 located at the end of the sunk box group that constructs the sunk tunnel is sunk.
The shield machine 8 is advanced while constructing a shield tunnel, and penetrates the end wall 2 of the submerged box 1.
The concrete shear generated due to the penetration of the end wall 2 is discharged through the hollow pipe 33. The slip valve 34 is openable and closable, and is closed when the slip is not removed.
Next, by propelling the shield machine 8 to the vicinity of the partition 3, the surface of the main body of the shield machine 8 and the water-stopping material 5 are brought into close contact with each other, and water is stopped between the shield machine 8 and the plurality of opening walls 4.
Next, a space surrounded by the partition wall 3, the cutter section 81 of the shield machine 8, the ceiling 11, the floor 12, and the wall 13 of the immersion box 1, and the opening wall 4 closest to the partition wall 3 among the plurality of opening walls 4. The water accumulated in the water is drained through a drain pipe 31. The drain valve 32 can be opened and closed, and is closed when water is not drained.
After the dry space is formed by draining the water, the partition wall 3 is opened, and the front cutter portion 81 of the shield machine 8 is dismantled to open the submerged tunnel and the shield tunnel.
[0024]
<B> Embodiment 2 of connection method
Sinking box 1 located at the end of the sunk box group that constructs the sunk tunnel is sunk.
As a water-stopping material constituting the submerged box 1, a film-like water-stopping material 5a is stored in a groove provided around the opening of the opening wall 4.
The shield machine 8 is advanced while constructing a shield tunnel, and penetrates the end wall 2 of the submerged box 1.
The concrete shear generated due to the penetration of the end wall 2 is discharged through the hollow pipe 33.
Next, the shield machine 8 is propelled to the vicinity of the partition 3 and engages with the opening wall 4.
Next, the fluid 5b is injected and expanded into the film of the film-like water blocking material 5a, and water is stopped between the surface of the main body of the shield machine 8 and the plurality of opening walls 4.
Next, a space surrounded by the partition wall 3, the cutter section 81 of the shield machine 8, the ceiling 11, the floor 12, and the wall 13 of the immersion box 1, and the opening wall 4 closest to the partition wall 3 among the plurality of opening walls 4. The water accumulated in the water is drained through a drain pipe 31.
After the dry space is formed by draining the water, the partition wall 3 is opened, and the front cutter portion 81 of the shield machine 8 is dismantled to open the submerged tunnel and the shield tunnel.
[0025]
<C> Embodiment 3 of connection method
This is a method in the case where the sinking container 1 of the above-described first or second embodiment has the jack 7.
After penetrating the shield machine 8 through the end wall 2, the shield machine 8 is fixed by using a jack 7 on a jack base 6 provided adjacent to the end wall 2.
The concrete shear generated due to the penetration of the end wall 2 is discharged through the hollow pipe 33.
The traveling direction is controlled by the jack 7 so that the shield machine 8 can pass through the opening of the opening wall 4.
The shield machine 8 is propelled to the vicinity of the partition 3.
Here, in the first embodiment, the water stopping is completed by the close contact between the fixed water stopping material 5 and the shield machine 8, but in the second embodiment, the water stopping is completed by expanding the water stopping material. I do.
Next, a space surrounded by the partition wall 3, the cutter section 81 of the shield machine 8, the ceiling 11, the floor 12, and the wall 13 of the immersion box 1, and the opening wall 4 closest to the partition wall 3 among the plurality of opening walls 4. The water accumulated in the water is drained through a drain pipe 31.
After the dry space is formed by draining the water, the partition wall 3 is opened, and the front cutter portion 81 of the shield machine 8 is dismantled to open the submerged tunnel and the shield tunnel.
[0026]
<D> Embodiment 4 of connection method
In any one of the above-described first to third embodiments, the water stoppage between the main body surface of the shield machine 8 and the plurality of opening walls 4 is completed.
Next, the space surrounded by the shield machine 8, the opening wall 4 and the ceiling 11 of the immersion box 1 is filled with the injection material 9.
Next, a space surrounded by the partition wall 3, the cutter section 81 of the shield machine 8, the ceiling 11, the floor 12, and the wall 13 of the immersion box 1, and the opening wall 4 closest to the partition wall 3 among the plurality of opening walls 4. The water accumulated in the water is drained through a drain pipe 31.
After the dry space is formed by draining the water, the partition wall 3 is opened, and the front cutter portion 81 of the shield machine 8 is dismantled to open the submerged tunnel and the shield tunnel.
[0027]
【The invention's effect】
Since the structure of the submerged box and the method of connecting the underwater tunnel according to the present invention are as described above, the following effects can be obtained.
<A> Since the connection between the submerged tunnel and the shield tunnel can be connected without using a connection box, there is no restriction on the marine conditions required for installation of the connection box, and the construction period can be shortened.
<B> When connecting the submerged tunnel and the shield tunnel, there is no need to firmly solidify the vicinity of the connection with underwater concrete, so that the problem that the shield machine cannot be cut does not occur.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view illustrating that a shield machine reaches a submerged box according to the present invention; FIG. 2 is a longitudinal sectional view illustrating that a shield machine is engaged in a submerged box according to the present invention; FIG. FIG. 4 is a cross-sectional view for explaining the shape of the opening of the opening wall. FIG. 4 is a cross-sectional view for explaining the arrangement of jacks provided on the opening wall. FIG. 6 is a cross-sectional view of a buried box when the injection material is filled. FIG. 7 is a cross-sectional view illustrating a connection state between a conventional shield tunnel and a buried tunnel. Figure [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Buried box 11 ... Ceiling 12 ... Floor 13 ... Wall 2 ... End wall 3 ... Partition wall 4 ... Opening wall 5 ... Waterproof material 6 ... Jack stand 7. ··· Jack 8 ··· Shield machine 81 ·· Cutter part 9 ··· Injection material

Claims (7)

In a submerged box, which is a cylindrical body consisting of a ceiling, floor, and walls with both ends open,
An end wall with one open end closed,
A partition wall connected to the ceiling, the floor, and the wall inside the skeleton,
A plurality of opening walls connected to the ceiling, the floor, and the wall, and opening an opening provided between the end wall and the partition,
Water-stopping material provided around the opening of the opening wall,
Characterized in that a shield machine can be engaged with the opening wall,
Sunk box. The submerged box according to claim 1,
As the water-stopping material, a film-like water-stopping material is housed in a groove provided around the opening of the opening wall,
By injecting and expanding a fluid into the film of the film-shaped water-stopping material, a gap between the opening of the opening wall and the shield machine engaged with the opening can be made water-tight. And
Sunk box. In the submerged box according to claim 1 or 2,
A jack is provided on a plurality of jack stands connected to the inner surface of the buried box,
The shield machine penetrating the end wall of the immersion box, characterized in that the traveling direction can be controlled by fixing with the jack,
Sunk box. In the connection method of the underwater tunnel connecting the submerged tunnel and the shield tunnel,
Installing the submerged box according to any one of claims 1 to 3 on the bottom of the water,
Penetrating the end wall of the submerged box located at the end of the submerged box group, and propelling the shield machine to near the bulkhead of the submerged box,
Stops water between the shield machine and the plurality of opening walls,
Draining water between the partition and the opening wall,
Open the partition,
By disassembling the front cutter part of the shield machine, the sink tunnel and the shield tunnel are opened,
How to connect underwater tunnel. In the connection method of the underwater tunnel connecting the submerged tunnel and the shield tunnel,
Installing the submerged box according to claim 2 or 3 on the bottom of the water,
Penetrating the end wall of the submerged box located at the end of the submerged box group, and propelling the shield machine to near the bulkhead of the submerged box,
The shield machine is engaged with a plurality of the opening walls,
By injecting and expanding a fluid in the film of the film-like water-stopping material, the shield machine and the water between the plurality of opening walls are stopped,
Draining water between the partition and the opening wall,
Open the partition,
By dismantling the front cutter part of the shield machine, the submerged tunnel and the shield tunnel are opened,
How to connect underwater tunnel. In the connection method of the underwater tunnel connecting the submerged tunnel and the shield tunnel,
Installing the submerged box according to claim 3 on the bottom of the water,
The shield machine after penetrating the end wall of the submerged box located at the end of the submerged box group, fixed with the jack, while controlling the traveling direction, propelled to near the bulkhead,
The shield machine is engaged with a plurality of the opening walls,
By injecting and expanding a fluid in the film of the film-like water-stopping material, the shield machine and the water between the plurality of opening walls are stopped,
Draining water between the partition and the opening wall,
Open the partition,
By dismantling the front cutter part of the shield machine, the submerged tunnel and the shield tunnel are opened,
How to connect underwater tunnel. The method for connecting a submarine tunnel according to any one of claims 4 to 6,
After stopping water between the shield machine and the plurality of opening walls,
Filling a space surrounded by the shield machine, the opening wall and the inner surface of the submerged box with an injection material,
How to connect underwater tunnel.

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