JPH0732634Y2 - Double tunnel segment - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double tunnel segment provided in a space formed in the ground by a double-track shield or the like.

[0002]

2. Description of the Related Art A method for constructing a double-track subway road or a road tunnel having a large number of upper and lower lanes is described in, for example, Japanese Patent Laid-Open No.
It has already been proposed by the present applicant in Japanese Patent Publication No. 7-184198. That is, FIG. 4 shows a conventional example of a dual type road tunnel having an upper and lower line constructed by such a shield. In the case of this example, the central portion of the tunnel constructed through the segment main body 1'is simply partitioned by columns or partition walls 2 ", and the inspection passages 3'for inspecting the inside of the tunnel are provided on the left and right, respectively. It is provided at the end of the road section 3 ″.

[0003]

However, since the above-mentioned inspection passage 3'is required for both the upper and lower lines, the segment body 1'forming the tunnel has a cross section in consideration of the road width required for these two inspection passages 3 '. Therefore, there is a problem that the tunnel cross section becomes large accordingly. In addition, there are many cases where handrails are simply installed in the inspection passage 3'and are not separated from the roadway part 3 ", so when a traffic accident occurs, etc.
There was also the problem that the safety of the inspectors was not secured.

The present invention has been proposed in view of the above points, and its purpose is to make it possible to reduce the excavation cross section of a tunnel and to ensure the safety of the inspector's traffic. It is to provide a double tunnel segment capable of efficiently burying various pipes such as.

[0005]

[Means for Solving the Problems] That is, in order to achieve the above-mentioned object, the present invention is a two-way eyebrows constructed in the ground to construct a double-track subway or a road tunnel having a large number of up and down lanes. In the continuous shield tunnel, an inspection passage space that also serves as an upper and lower line is formed in a central segment that is provided between the upper and lower portions of the central portion of the segment body that constitutes the shield tunnel and that divides the tunnel upper and lower lines.

[0006]

In the present invention, a space for passages and the like is provided in the central segment provided in the central portion of the eyebrow-shaped segment, and this single space can be used for both upper and lower lines, so that wasteful space is omitted. In addition, the wall-shaped or column-shaped segments on both sides of the passage ensure the safety of traffic for inspectors. Also, various pipes can be embedded in that portion in a lump, so that the pipes can be efficiently carried out.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 (a) shows a first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a substantially eyebrows-shaped segment body assembled in a space excavated by, for example, a shield for constructing a double track. Form a tunnel. Therefore, the central segment 2 for partitioning the upper and lower lines is provided between the upper and lower parts in the central portion of the segment body 1 which constitutes the shield tunnel.
Is assembled to have a space 3 inside. The space 3 is used as an inspection passage that also serves as an up-and-down line, and in the concrete 4 at the bottom of the passage, various pipes 5 such as electricity, communication, and water required for tunnel equipment are provided.
In this case, it is preferable that the pipes can be collectively piped and the workability is good, and a desired branch pipe can be drawn out from the central portion to the vertical line side if necessary.

Reference numeral 6 designates an outer shell segment incorporated in a cocoon shape, and a secondary winding concrete 7 is struck on the inside thereof. Further, 8 is a ceiling plate provided in a substantially horizontal direction above the length direction of the segment main body 1, and an exhaust duct 9 is provided between the ceiling plate 8 and the inner peripheral surface of the secondary wound concrete 7. On the other hand, 10 is floor slab concrete, 1
Reference numeral 1 is an air supply duct, and 3a is an inspection passageway surface. FIG. 1B is a cross-sectional view taken along the line AA in FIG. 1A, in which the pillar segments 2A are vertically provided at appropriate intervals between the upper and lower portions of the center of the segment body 1.

The space 3 provided in the central portion of the tunnel in this way
If the inspection passage is used as a vertical line, the space occupied by the inspection passage is reduced, and therefore the excavated cross section of the tunnel can be reduced. Further, since the inspection passage is surrounded by a strong structure, the safety of the inspector's traffic is ensured.

FIG. 2 shows a second embodiment of the present invention.
In this example, the central segment 2'is formed in a wall shape with a precast concrete plate, a steel plate, etc., and the inspection passage consisting of the internal space 3 has a closed structure, and has a structure excellent in fire resistance, earthquake resistance, water resistance, etc., and at an appropriate position. For inspecting abnormalities in the up and down lanes, for example, an inspection window 12 made of tempered glass or an inspector goes out to the up and down lanes, and the occupants of cars left in the tunnel at the time of disaster are in the center. The feature is that a fire door 13 is installed to escape to the passage. In this case, when it is necessary to make the inspection window 12 large, sufficient strength can be obtained by, for example, reinforcing the segments or reshaping the segments. With this structure, the internal space 3 of the central segment 2'can be used not only as an inspection passage but also as an evacuation passage in the event of a disaster.

FIG. 3 shows a third embodiment of the present invention.
In this embodiment, for example, an evacuation ground communication facility 14 provided when a tunnel entrance is far in a long tunnel or the like.
Is connected to the inspection and evacuation passage formed by the space 3 in the central segment 2 or 2 '. In this case, the ground communication facility 14 for evacuation and the inspection / evacuation passage are firmly and watertightly connected so that they can be escaped by transmitting them in the event of a disaster such as an earthquake. In addition, the evacuation ground communication facility 14 can also serve as a ventilation tower. In this case, it goes without saying that ventilation equipment is required on the ground. In addition, 15 is a ladder provided in the inspection and evacuation passage, 16 is the ground connection facility for evacuation 1
A manhole for access to the 4th side, and 17 is an evacuation stairway to the 18th side above the ground.

Although an example of dividing the segment is shown in FIG. 1, it can be appropriately changed depending on the size of the shield cross section, the thickness of the segment, and the like. Further, in the above embodiments, the space 3 provided in the central segment, that is, the central portion of the tunnel is used as a passage. However, it is not necessarily the purpose of being shared by people, and it is used as sewer, or a communication cable or a power cable. Needless to say, it can also be used as a laying place for etc.

[0013]

EFFECTS OF THE INVENTION According to the present invention, since the inspection passage space for both upper and lower lines is formed in the central segment that is provided in the segment body that constitutes the shield tunnel and divides the upper and lower lines of the tunnel, there are two Since it requires only a passage, the excavation cross section of the tunnel can be made small, and the excavation work is easy and economical. Further, since there is a passage inside the central segment, there is an effect that the safety of inspectors, evacuees, etc. can be secured. Further, since various pipes can be embedded together in the central segment and the branch pipes can be drawn out to the left and right, there is an effect that the pipes can be efficiently performed.

[Brief description of drawings]

1 is a first embodiment of the present invention, (a) is a front sectional view,
(B) shows a cross-sectional view taken along the line A-A in (A).

FIG. 2 is a side view of a second embodiment of the present invention.

FIG. 3 is a third embodiment of the present invention.

FIG. 4 shows a conventional example.

[Explanation of symbols]

 1 segment body 2, 2'center segment 3 space 3a passage road surface 5 piping

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Masami Inoue 1-24-4 Shinkawa, Chuo-ku, Tokyo Inside Daihoken Construction Co., Ltd. (72) Inventor Yukihiro Koami 1-24-4 Shinkawa, Chuo-ku, Tokyo No. Daitoken Construction Co., Ltd. (72) Inventor Kenji Okubo 1-24-4 Shinkawa, Chuo-ku, Tokyo Within Daitoyo Construction Co., Ltd. (56) Reference JP 57-178095 (JP, A) 49-58127 (JP, U)

Claims (2)

[Scope of utility model registration request] 1. A double-track subway, multiple up and down lanes and
In an eyebrows double-type shield tunnel constructed in the ground to construct a road tunnel having a central segment that divides the upper and lower parts between the upper and lower parts of the central part , standing vertically in the central segment at appropriate intervals.
A segment for double tunnels, characterized in that an inspection and evacuation passage space for both upper and lower lines is formed by two columns of pillar segments and a passage road surface provided at the bottom . 2. A double-track subway, multiple up and down lanes, and
Has a central segment that divides the upper and lower lines between the upper and lower parts
Eyebrows built underground to build a road tunnel
In the double shield tunnel of, the inside of the closed structure in which the central segment is formed in a wall shape
It is an inspection and evacuation passage space consisting of a space, and it is characterized by installing inspection windows and fire doors at appropriate positions
Dual tunnel segment.