JP3562855B2 - Adjustment segment for tunnel - Google Patents

Description

[0001]
[Industrial applications]
As shown in FIG. 3, the present invention is applied to the connection point between the concrete segment 1A installed on one side and the metal segment 1B installed on the other side along the tunnel axis direction P, as shown in FIG. For metal tunnels arranged adjacent to each other in the direction and having at least a first abutting surface with the concrete segment 1A formed in an uneven shape to be fitted to a second abutting surface on the concrete segment 1A side. Regarding the adjustment segment 1C.
[0002]
[Prior art]
Conventionally, as shown in FIG. 8, for example, as shown in FIG. 8, the tunnel adjusting segment 1 </ b> C has an integrated structure having a first butting surface having an uneven shape with the concrete segment 1 </ b> A (the drawing shows an example of a projecting butting surface s). Was composed of things. Then, the first butted surface having the uneven shape is formed by performing various types of machining for a long time on a curved plate block material that constitutes the adjusting segment for tunnel, and then shaving.
[0003]
[Problems to be solved by the invention]
However, in the above-mentioned prior art, there is a problem that the processing cost for forming the first butting surface having a concave-convex shape that extends long in a curved state is extremely high, and the cost of the adjustment segment is several times that of a normal segment. Incidentally, it is also possible to form the first butting surface of the uneven shape by casting using a mold, but in this case, a special technique is required, and the manufacturing process becomes complicated, and the unevenness is increased. There is a problem that the processing accuracy of the shape is not sufficient.
[0004]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a tunnel adjusting segment that can be manufactured at a low cost while securing desired accuracy in order to solve the above-described disadvantages of the related art. To provide.
[0005]
[Means for Solving the Problems]
The tunnel adjusting segment according to the present invention is disposed adjacent to a connection point between a concrete segment installed on one side and a metal segment installed on the other side along the tunnel axis direction along the circumferential direction of the tunnel cross section. And a metal adjusting segment for a tunnel, wherein at least a first abutting surface with the concrete segment is formed in an uneven shape to be fitted to an uneven second abutting surface on the concrete segment side. A feature of the first aspect is that a plurality of plate-shaped butting members provided with the first butting surface and divided in the longitudinal direction of the first butting surface, and an adjustment segment main body to which the plurality of plate-shaped butting members are attached. It is in the point.
[0006]
Further, a second characteristic configuration is the position in the first butting surface when the butting member is attached to one of the butting member or the adjusting segment main body and the adjusting segment body in the first characteristic configuration. And a positioning pin is provided on the other of the butting member and the adjustment segment main body to be fitted in the positioning hole.
[0007]
[Action]
According to the first characterizing feature of the adjustment segment tunnel according to the invention, the first abutment surface longitudinally provided with a first abutment surface of the uneven shape to be fitted to the second abutting face uneven least concrete segment side Each of the plurality of plate-shaped butting members divided into a plurality is attached to an adjusting segment main body to form a metal adjusting segment for a tunnel, and the adjusting segment for the tunnel is installed on one side along the tunnel axis direction. At the connection point between the concrete segment to be connected and the metal segment installed on the other side, the above-mentioned uneven first contact surface is fitted to at least the uneven second contact surface on the concrete segment side, and the tunnel cross section is formed. Are installed adjacent to each other along the circumferential direction.
[0008]
According to the second feature configuration, in the first feature configuration, a positioning pin provided on one side of the butting member or the adjustment segment main body is fitted into a positioning hole provided on one of the butting member or the adjustment segment main body. Then, the mounting position within the first butting surface is determined, and in the positioned state, each of the plurality of plate-shaped butting members is mounted on the adjusting segment main body to form a metal tunnel adjusting segment.
[0009]
【The invention's effect】
Therefore, according to the first characteristic configuration of the adjusting segment for tunnel according to the present invention, for example, the adjusting segment main body in the form of a plate block is manufactured by casting with a mold, and each butting member divided into short widths is relatively short. After manufacturing with a desired precision while keeping the processing cost low by time machining, a process for assembling the both can provide a tunnel adjustment segment that is inexpensive as a whole.
[0010]
Further, according to the second characteristic configuration, the position in the first abutting surface can be easily determined simply by fitting the positioning pin provided in the other in the positioning hole provided in one of the butting member or the adjusting segment body. For example, assembling work can be performed more appropriately and more quickly than when such a positioning hole or the like is not provided, so that suitable means of the first characteristic configuration can be obtained.
[0011]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, a tunnel H is formed by assembling a plurality of tunnel segments (hereinafter simply referred to as segments) 1 in an annular shape along the tunnel circumferential direction, and connecting and fixing them together to form a lateral hole peripheral wall X. It is created by doing.
[0012]
In constructing the tunnel H, a shield tunnel excavator 2 having a cutter 2a at a front end and a propulsion jack 2b at a rear end side is used for propulsion for applying a propulsion reaction force to the segment 1 assembled to the side wall X. While moving the cutter 2a in the longitudinal direction by the extension of the jack 2b, the cutter 2a is rotated around the tunnel axis P to dig in the ground, and the propulsion distance per ring of the segment 1 (usually, often about 100 cm) is increased. After the propulsion, the propulsion jack 2b is contracted, and the segments 1 are sequentially installed between the propulsion jack 2b and the segment 1 of the side wall peripheral wall X.
[0013]
The segment 1 is formed in the shape of a rectangular plate curved along the circumferential direction of the tunnel, and is made of a concrete segment 1A made of concrete, which is inferior in strength but inexpensive in terms of material, and an expensive but high-strength casting. There are two types of metal segments 1B. That is, as shown in FIG. 2, for example, in a subway tunnel H, an inexpensive concrete segment 1A is used in a tunnel portion H1 located below the road RD on the ground side, and the tunnel H is curved and the road RD is cut off. In the tunnel portion H2 which protrudes laterally from the lower position and is located below the building BL on the ground side, a metal segment 1B having excellent strength from a safety aspect is used.
[0014]
Therefore, as shown in FIG. 3, the above two types of segments are connected to the connection point between the concrete segment 1A installed on one side and the metal segment 1B installed on the other side along the tunnel axis P direction. The adjustment segment 1C for tunnels is required. FIG. 4 is a view of the EE section of FIG. 3 as viewed from the right side of the figure.
[0015]
However, the girder height of the concrete segment 1A is formed thicker than the girder height of the metal segment 1B in order to increase the strength, and as shown in FIG. Since one p is formed in a convex shape and the other q is formed in a concave shape, and the two mating surfaces p and q are fitted to each other to increase the connection strength, the tunnel adjusting segment 1C is , Made of a metal material such as casting or steel, and the first butting surface with the concrete segment 1A is fitted to the concave second butting surface q or the convex second butting surface p on the concrete segment 1A side. It is formed in an uneven shape.
[0016]
As shown in FIGS. 5 and 6, the tunnel adjusting segment 1 </ b> C has a first abutting surface s, r having an uneven shape facing the concrete segment 1 </ b> A side, and is divided into a plurality of pieces in the longitudinal direction of the first abutting surface. (Five in the figure) a plate-shaped butting member 10 and an adjustment segment main body 11 to which the five plate-shaped butting members 10 are attached. The adjustment segment main body 11 is manufactured by, for example, a mold, and the butting member 10 is manufactured by a mold, and is further finished by cutting or the like. In the figure, the butting member 10 is illustrated as being divided into five parts, but the number is not limited to five. 5 and 6, (A) shows the convex first butting surface s fitted to the concave second butting surface q on the concrete segment 1A side, and (B) shows the concrete segment 1A. 1 shows a concave first butting surface r fitted to the second convex butting surface p on the side.
[0017]
Then, as shown in FIG. 7, a positioning hole for determining a position in the first butting surface when attaching the butting member 10 to the adjusting segment body 11 in one of the butting member 10 or the adjusting segment body 11. A positioning pin 13 that fits into the positioning hole 12 is provided on the other of the butting member 10 and the adjustment segment main body 11. The figure shows a case where the positioning hole 12 is provided on the butting member 10 side and the positioning pin 13 is provided on the adjustment segment main body 11 side. Conversely, the positioning hole 12 is provided on the adjustment segment main body 11 side and the positioning pin 13 is provided on the adjustment segment main body 11 side. It may be provided on the butting member 10 side. Further, a mounting hole 14 for mounting the butting member 10 to the adjustment segment main body 11 with a screw 15 is provided in the butting member 10, and the butting member 10 and the adjusting segment main body 11 are adjacently provided along the entire circumference along the first butting surface. There is provided a groove 16 for installing a sealing material for sealing between the segments to be sealed and preventing water leakage from the back side of the segment into the tunnel H.
[0018]
(Another embodiment)
In the above-described embodiment, the first butting surfaces s and r of the uneven shape formed on each butting member 10 are formed as the butting surfaces that fit with the second butting surfaces p and q of the uneven shape provided on the concrete segment 1A. If the metal segment 1B is formed with an uneven butting surface, the butting surface that fits into the uneven butting surface of both the concrete segment 1A and the metal segment 1B is provided on the tunnel adjusting segment 1C.
[0019]
In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.
[Brief description of the drawings]
FIG. 1 is a vertical sectional view showing a shield tunnel. FIG. 2 is a plan view showing a tunnel creation position. FIG. 3 is a vertical sectional view showing a main part of the shield tunnel. FIG. 4 is a cross sectional view showing a main part of the shield tunnel. FIG. 5 is a perspective view showing an adjusting segment for tunnel. FIG. 6 is a cross-sectional view showing an adjusting segment for tunnel. FIG. 7 is a cross-sectional view showing a butt member. FIG. 8 is a cross-sectional view showing a conventional adjusting segment for tunnel. Description]
1A Concrete segment 1B Metal segment 10 Butt member 11 Adjustable segment main body 12 Positioning hole 13 Positioning pin

Claims (2)

Along the connection direction between the concrete segment (1A) installed on one side and the metal segment (1B) installed on the other side along the tunnel axis direction, it is arranged adjacently along the circumferential direction of the tunnel cross section, and A metal adjusting segment for a tunnel, wherein at least a first abutting surface with the concrete segment (1A) is formed into an uneven shape to be fitted to an uneven second abutting surface on the concrete segment (1A) side. ,
Wherein the first and plurality of plate-shaped butt member in and divided into a first abutment surface longitudinally with the abutting face (10), adjustment segment body for mounting said plurality of plate-shaped butting member (10) (11 ) And an adjustment segment for tunnels. Positioning for determining a position in the first butting surface when attaching the butting member (10) to the adjusting segment body (11) to one of the butting member (10) or the adjusting segment body (11). The positioning pin (13) fitted in the positioning hole (12) is provided in the hole (12), and the other of the butting member (10) or the adjustment segment body (11) is provided. Adjustment segment for tunnels.

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