JP2897667B2 - Subway station structure and construction 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 structure of a subway station constructed by a triple-type multi-round shield machine and a construction method thereof.

[0002]

2. Description of the Related Art In recent years, with the development of shield excavators, if a subway station is constructed with a platform at the center of the tunnel where passengers can get on and off and trains on both sides of the platform, It was possible to build at once with a triple multi-round shield excavator equipped with a rotary cutter (face plate).

An object of the present invention is to provide a structure of a subway station constructed by a triple shield excavator and a construction method thereof, in accordance with the use of a triple shield excavator. I do.

[0004]

The structure of a subway station according to claim 1 of the present invention has a platform at the center of a tunnel, a track on both sides of the platform, and a pillar on the platform, respectively. And a ring girder of a triple-type multi-circular shield machine as a primary lining material of the tunnel at an end portion of the tunnel, which is constructed adjacent to a segment lining the inner periphery of the tunnel. .

According to a second aspect of the present invention, there is provided a method for constructing a subway station, comprising a platform at the center of a tunnel, a track on both sides of the platform, a pillar at the platform, and an end of the tunnel. When a subway station is constructed by installing a ring girder of a triple-type multi-circular shield excavator as a primary lining material of the tunnel in the section, and constructing a subway station, the shield excavation is performed. The ring girder of the machine is left as a primary lining material at the end of the tunnel, a pillar is erected inside the ring girder, and lining concrete is cast as a secondary lining material on the inner periphery of the ring girder. It is characterized by doing.

[0006]

【Example】

Embodiment 1 FIG. 1 to 8 show a subway station constructed by a triple-type multi-circular shield excavator having three rotating cutters (face plates), in which the symbol A is built in the center of the tunnel, Platform B at the station where passengers get on and off the train, B is a track built on both sides of the platform A, a track on which the train stops, and C is a shaft built in advance to the platform A and used as a passage to the ground after the construction is completed. is there.

Reference numeral 1 denotes an arc segment that is installed as a primary lining material on the ground of the tunnel, and arc segments 2 and 3 cover the concavity in the circumferential direction of the tunnel similarly to the arc segment 1. The upper gull segment and the lower gull segment, which are installed as primary lining materials and cover the ground of the tunnel, are installed as primary lining materials at the end of the tunnel, and are the same as the arc segments 1, upper and lower gull segments 2 and 3, Ring girder (outer shell) of a triple-type multi-circular shield excavator for lining the ground of a tunnel, 5 is lining concrete cast as a secondary lining material inside the ring girder 4, and 6 is this lining Reinforcing bars reinforced in concrete 5, and reference numerals 7 and 8 stand upright in the constricted part of the tunnel, and the main columns and structures that receive the vertical load of the tunnel. It is a pillar.

The arc segment 1 and the upper and lower seagull segments 2 and 3 are installed while being connected to each other in the circumferential direction of the tunnel and in the longitudinal direction of the tunnel.

A plurality of stiffeners 4a are provided inside the ring girder 4 in parallel with each other at predetermined intervals in a circumferential direction of the ring girder 4, and the stiffeners 4a are used by the stiffeners 4a.
The rigidity of the ring girder 4 and the lining concrete 5 are prevented from slipping.

An anchor bolt 9 projecting into the lining concrete 5 in the ring girder 4 is protruded from the arc segment 1a at the end adjacent to the ring girder 4 and the upper and lower seagull segments 2a and 3a. 9, the lining concrete 5 and the arc segment 1a and the upper and lower seagull segments 2a and 3a are completely integrated (see FIG. 8).

The anchor bolt 9 is an arc segment.
Utilizing bolt holes provided in the joint plate in the longitudinal direction of the tunnel of 1a and the upper and lower seagull segments 2, 3a, a plurality of protrusions are provided at predetermined intervals in the circumferential direction of the tunnel according to the scale of the tunnel and the like. .

Further, the ring garter 4 in contact with the shaft C side
At the end of the water stop plate 10 is attached by continuous welding in the circumferential direction of the ring girder 4,
Further, sealing materials 11a and 11b are provided on the end of the lining concrete 5 in contact with the shaft C side.
Are continuously and concentrically filled in the circumferential direction, and the water stoppage plate 10 and the seal members 11a and 11b are provided for water leakage at this portion (see FIG. 7). The sealing material 11
For a and 11b, for example, a water expansion sealing material such as butyl rubber is used.

A seal material 11a is continuously and concentrically filled in the circumferential direction of the tunnel between the arc segment 1a, the upper and lower seagull segments 2a and 3a, and the lining concrete 5. It is provided for partial water leakage (see FIG. 8).

The main pillar 7 is a constricted part of the tunnel, that is, the upper seagull segment 2 and the lower seagull segment 3
In between, the structural columns 8 are attached to the stiffeners 4a of the ring girder 4, and are erected at predetermined intervals in the longitudinal direction of the tunnel.

The main column 7 is made of, for example, a circular steel tube, and the structural column 8 is made of a square steel tube or a built-up material.

Next, a construction method of a subway station according to the present invention will be described.

First, a tunnel of a station part having a home A in the center and tracks B, B on both sides thereof is excavated by a triple-type multi-circular shield excavator. At the same time, at the tail of the shield machine, the ground of the tunnel is lined with the arc segment 1 and the upper and lower seagull segments 2 and 3. As a completed type of the shield tunnel general section, the main pillars 7 are erected at predetermined intervals at the center of the tunnel.

When the shield machine reaches the shaft C, all the devices inside the shield machine are removed, and only the ring girder 4 is left at the tip of the tunnel.

Next, the structural columns 8 are erected at predetermined intervals between the upper and lower constricted portions 4 b of the ring girder 4 to reinforce the ring girder 4.

If there is a structural column which can be diverted in advance in the ring girder 4, it is used.

Next, reinforcing reinforcing bars 6 are arranged inside the ring girder 4, and anchor bolts 9 are protruded inside the ring girder 4 from the arc segment 1 a at the end and the upper and lower seagull segments 2 a and 3 a.

The anchor bolts 9 are attached to bolt holes (not shown) formed for joining the segments in the longitudinal direction of the shield tunnel to save labor.

Next, a mold (not shown) is continuously assembled inside the ring girder 4 in the circumferential direction of the ring girder 4, and lining concrete 5 is cast inside the mold as a secondary lining material. Then, after the lining concrete 5 has developed sufficient strength, it is released from the mold. Water stoppage plate
10 and the sealing material 11a are to be applied before the lining concrete 5 is cast.

After the lining concrete 5 is applied, the sealing material 11b is attached, and the pit concrete of the standing pile C is poured.

Through the above process, a subway station can be constructed by using the ring girder 4 of the triple-type multi-circular shield machine as the primary lining material of the tunnel.

[0026]

The construction of a subway station according to the first aspect of the present invention and the construction method of a subway according to the second aspect of the present invention have the above-described construction, and in particular, the primary lining is provided at the end of the tunnel. A ring girder of a triple-type multi-round shield machine is installed adjacent to a ring segment as a material, a column is erected inside the ring girder, and lining concrete is cast as a secondary lining material. Therefore, there is an effect that the subway station can be constructed very economically and safely.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing the structure of a subway station.

FIG. 2 is a longitudinal sectional view showing the structure of a subway station.

FIG. 3 is a cross-sectional view showing the structure of a subway station.

FIG. 4 is a cross-sectional view showing the structure of a subway station.

FIG. 5 is an enlarged view of a part A in FIG. 2;

FIG. 6 is an enlarged view of part B in FIG.

FIG. 7 is an enlarged view of a portion C in FIG. 3;

FIG. 8 is an enlarged view of a portion shown in FIG. 3;

[Explanation of symbols]

A: Station platform, B: Track, C: Vertical shaft, 1 ... Arc segment, 2 ... Upper seagull segment, 3 ... Lower seagull segment, 4 ... Ring girder (outer shell), 5 ... Lining concrete, 6 ... Reinforcing steel bar, 7… Main pillar, 8… Structure pillar,
9 ... anchor bolt, 10 ... water stop plate, 11a, 11b
... Seal material.

Claims (2)

(57) [Claims] 1. A triple-type multi-circular shield excavator which excavates a tunnel with a segmented multi-circular shield excavator while covering the inner periphery thereof with a segment, and as a primary lining material at the end of the tunnel. The ring girder is installed adjacent to the segment, a pillar is erected inside the ring girder, and the lining concrete is cast as a secondary lining material, thereby being constructed. Subway station structure. 2. A triple-type multi-circular shield excavator which excavates a tunnel with a segmented multi-circular shield excavator while covering the inner periphery with a segment, and as a primary lining material at the end of the tunnel. A ring girder adjacent to the segment, erecting a pillar inside the ring girder, and casting lining concrete as a secondary lining material, a construction method of a subway station .