JPH0571297U - Double tunnel segment - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] A dual excavation section that allows the tunnel excavation cross section to be small, ensures the safety of inspectors' traffic, and efficiently burys various pipes for electricity and communications. Provide segment for shaped tunnel. [Structure] In an eyebrow double shield tunnel constructed in the ground for constructing a double-track subway road or a road tunnel having a large number of up and down lanes, a central portion in the segment body 1 constituting the shield tunnel. The inspection passage space 3 for both upper and lower lines is formed in the central segment that is provided between the upper and lower sides and divides the upper and lower lines of the tunnel.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a dual-type tunnel segment provided in a space formed in the ground by a double-track shield or the like.

[0002]

[Prior Art]

 The method of constructing a double-track subway road or a road tunnel having a large number of upper and lower lanes has already been proposed by the present applicant in, for example, Japanese Patent Application Laid-Open No. 57-184198. That is, FIG. 4 shows a conventional example of a dual type road tunnel having upper and lower lines 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 roadway 3 ″ of the line.

[0003]

[Problems to be solved by the device]

 However, since the above inspection passage 3'is required for both the upper and lower lines, the segment body 1'that forms the tunnel needs to have a cross section that also considers the road width required for these two inspection passages 3 '. There is a problem that the cross section becomes large. In addition, there are many cases where handrails are simply installed in the inspection passage 3'and they are not isolated from the roadway 3 ", so that the safety of the inspectors is not ensured when a traffic accident occurs. There were also points.

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 the tunnel and to ensure the safety of the inspector's traffic. It is intended to provide a segment for a double tunnel in which various pipes for communication etc. can be buried efficiently.

[0005]

[Means for Solving the Problems]

 In other words, in order to achieve the above object, the present invention provides a double-shielded eyebrows-type shield tunnel constructed underground to construct a double-track subway road or a road tunnel having a number of upper and lower lanes. The inspection passage space for both upper and lower lines is formed in the central segment that is provided between the upper and lower parts of the center of the segment body that constitutes the tunnel and separates the upper and lower lines of the tunnel.

[0006]

[Action]

 In the present invention, a space for passages, etc. is provided in the central segment provided in the central portion of the eyebrow-shaped segment, so that this single space can be used for both upper and lower lines, and the wasteful space is omitted. The wall-shaped or column-shaped segments on both sides of the passage ensure the safety of traffic for inspectors. In addition, it is possible to embed various pipes together in that part so that the pipes can be efficiently processed.

[0007]

【Example】

 Hereinafter, preferred embodiments of the present invention will be described 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 a shield for constructing a double track, for example. Form a tunnel. Then, the central segment 2 for partitioning the upper and lower lines provided between the upper and lower sides in the central portion of the segment body 1 which constitutes the shield tunnel is assembled so as to have the space 3 therein. This space 3 is used as, for example, an inspection passage for both upper and lower lines, and various pipes 5 for electricity, communication, water, etc. necessary for tunnel equipment can be buried in the concrete 4 under the passage. In this case, it is preferable that piping can be performed collectively, 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 denotes 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 in the upper direction with respect to 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, 11 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 pillar columns 2A are vertically provided at appropriate intervals between the upper and lower portions of the center of the segment body 1 at appropriate intervals.

When the space 3 provided in the central portion of the tunnel is used as the inspection passage for both upper and lower lines as described above, the space occupied by the inspection passage is reduced, and therefore the excavated cross section of the tunnel can be reduced. Also, the inspection passage is surrounded by a strong structure, which ensures the safety of the inspector's traffic.

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 or the like, and the inspection passage including the internal space 3 is sealed. The structure is excellent in fire resistance, earthquake resistance, water resistance, etc. In addition, the inspection window 12 made of tempered glass, etc. and the inspector are used to inspect at appropriate positions for abnormalities in the upper and lower lanes. It is characterized by the installation of a fire door 13 that allows passengers of cars left in the tunnel to escape to the central aisle when going out to the roadway section or in the event of a disaster. In this case, when it is necessary to make the inspection window 12 large, it is possible to obtain sufficient strength by, for example, reinforcing the segments or reshaping the segments. With this structure, the inner 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, the central segment 2 is located in the ground contact facility 14 for evacuation provided when the tunnel entrance is far due to a long tunnel or the like. Alternatively, the inspection and evacuation passage consisting of 2'space 3 was communicated. In this case, the ground communication facility 14 for evacuation and the inspection and evacuation passage are firmly connected to each other in a watertight manner so that they can be escaped by transmitting them in the event of a disaster such as an earthquake. In addition, this ground contact facility 14 for evacuation can also function as a ventilation tower. In this case, it goes without saying that ventilation equipment is required on the ground. 15 is a ladder provided in the inspection and evacuation passage, 16 is a manhole for access to and from the ground communication facility 14 for evacuation, and 17 is an evacuation stairway to the ground 18 side.

Although an example of division of 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, but it is not always used for passage of people, but it is used as sewer, communication cable, electric power. Of course, it can also be used as a place for laying cables, etc.

[0013]

[Effect of the device]

 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, the conventional type requires two passages. On the other hand, since it is sufficient to use only one, the tunnel excavation cross section can be made small, and excavation work is easy and economical. Also, 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 the figure (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

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[Procedure amendment]

[Submission date] December 18, 1992

[Procedure 3]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

[Figure 4]

[Figure 3]

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Creator Masami Inoue 1-24-4 Shinkawa, Chuo-ku, Tokyo Inside Daihoken Construction Co., Ltd. (72) Creator Yukihiro Koami 1-24-4 Shinkawa, Chuo-ku, Tokyo No. Daitoken Construction Co., Ltd. (72) Creator Kenji Okubo 1-24-4 Shinkawa, Chuo-ku, Tokyo Daitoken Construction Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A double-shielded eyebrow type shield tunnel constructed in the ground for constructing a double-track subway road or a road tunnel having a large number of up and down lanes, in the center of the segment body constituting the shield tunnel. In the center segment that is provided between the upper and lower parts of the section and divides the tunnel upper and lower lines,
A double tunnel segment characterized by forming an inspection passage space that also serves as a vertical line.