JPH09195688A - Segment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a segment not causing deformation to a main girder part and having sufficient mechanical strength. SOLUTION: It is constituted by injecting concrete 3 in an inside of a box type frame body 9 on a margin of a skin plate 1 of which a main girder plate 4 and a joint plate 5 are erected, and a reinforcing member 11 is provided between the main girder plates 4 facing against each other. This reinforcing member 11 is constituted of a pair of lateral plate 14 respectively making contact with inner surface sides of the main girder plates 4 facing against each other and a longitudinal plate member 13 connecting these lateral plate 14 to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a segment which constitutes a cylindrical wall body in the axial direction of an excavation hole by joining a plurality of pieces to each other.

[0002]

2. Description of the Related Art Generally, when constructing a tunnel, an excavation hole is formed and a lining is provided to support a wall surface of the excavation hole. As this lining, a cylindrical wall body is used which is formed by connecting ring bodies, which are rectangular arc-shaped segments in plan view and are provided around the axis of the excavation hole, in a continuous manner in the axial direction of the excavation hole. In addition, when connecting the next ring body to the end surface of the existing tubular wall body, each segment that forms the end surface of the existing tubular wall body is pressed by the propulsion jack of the shield machine and moves in the excavating direction. Detachment is prevented.

An example of the above segment is shown in FIG. The segment 20 exemplified here is a synthetic segment composed of a steel plate and concrete, and the main girder plates 4 and 4 and the joint plates 5 and 5 are joined to the peripheral edge of the steel skin plate 1 by these. It is formed by filling concrete 3 inside the formed frame body 9. Further, a plurality of vertical ribs 7 are provided between the main girder plates 4 and 4 for increasing the mechanical strength of the segment. Both ends of the vertical rib 7 are joined to the inner surfaces of the main girder plates 4 and 4 by welding.

[0004]

In the segment 20 constructed as described above, the vertical ribs 7 form the main girder plate 4.
By the heat applied to the main girder plate 4 when it is welded to
As shown by the chain double-dashed line in FIG. 10, the main girder plate 4 is deformed,
The so-called lean horse phenomenon may occur. Due to this lean horse phenomenon, a bulged portion 8 that is slightly bulged from other portions is formed on the outer surface side of the main girder plate 4. When a plurality of segments that have undergone such deformation are joined to construct a tubular wall body, the force applied to the main girder plate 4 by the shield machine is concentrated on the bulging portion 8, and the vicinity of the bulging portion 8 is thereby increased. There was a case where the concrete 3 of No. 3 was broken and cracks 10 were generated along the vertical ribs 7.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a segment in which the main girder plate is not deformed and which has sufficient mechanical strength.

[0006]

The segment of the present invention comprises:
A cylindrical wall is formed around the axis of the drilling hole and is continuous in the axial direction thereof to form a tubular wall body, and is joined to a segment adjacent to the drilling hole in the axial direction of the skin plate at the peripheral edge thereof. A main girder plate that forms a surface and a joint plate that forms a joint surface between adjacent segments in the circumferential direction around the axis are formed by filling concrete inside a box-shaped frame body, facing each other. A reinforcing member is provided between the main girder plates, and the reinforcing member connects a pair of horizontal plate members that are in contact with the inner surface sides of the facing main girder plates, respectively, and connects the horizontal plate members to each other. The vertical plate member is arranged in the axial direction of the hole.

The reinforcing member includes a pair of vertical plate members,
The vertical plate members may be formed in a rectangular shape in plan view by the pair of horizontal plate members provided between the vertical plate members at both ends thereof.

A plurality of wall members are provided between the pair of vertical plate members at intervals from the horizontal plate member to form a box-shaped space, and the box-shaped space is formed in the main girder plate. Further, it may be configured as a bolt box that communicates with a bolt hole through which a bolt that joins the segments is inserted.

Further, the segment of the present invention is provided around the axis of the excavation hole and continuously provided in the axial direction to form a cylindrical wall body, and the segment is formed on the periphery of the skin plate. A main girder plate that forms a joint surface with adjacent segments in the axial direction of the hole, and a joint plate that forms a joint surface with adjacent segments in the circumferential direction around the axis of a box-shaped frame body The inside of the main girder plate, which is configured by being filled with concrete, is provided with a reinforcing member on the inner surface side of the main girder plate, and the reinforcing member contacts the inner surface side of the main girder plate. A vertical plate member which is joined to the skin plate and which is arranged in the axial direction of the drill hole and is joined to the skin plate.

Further, a pair of the vertical plate members are provided with an interval, and a wall member is provided between the vertical plate members with an interval with the horizontal plate member to form a box-shaped space. The bolt box may be configured to communicate with a bolt hole formed in the main girder plate and through which a bolt for joining the segments is inserted.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. In the following description, the same parts as those of the conventional example are designated by the same reference numerals, and the description thereof will be omitted or simplified. 1 to 3 show the segments of this embodiment. The segment 30 illustrated here is a synthetic segment made of a steel plate and concrete, and a rectangular steel plate is curved in an arc shape in accordance with the curvature of the inner wall surface of the excavation hole. Axial direction of drilling hole (arrow A, B direction in the figure)
Steel main girder plates 4 and 4 that form both joint surfaces of the steel plate, and steel joint plates 5 and 5 that form both joint surfaces in the circumferential direction (arrows C and D directions in the figure) around the axis of the drill hole. And are joined to the skin plate 1 in an upright state by welding or the like, and the concrete filling space S1 which is the internal space of the box-shaped frame 9 formed by these is filled with concrete 3 and formed. Is.

The main girder plate 4 and the joint plate 5 are formed with bolt holes 4a and 5a through which bolts for joining the segments are inserted, and these bolt holes 4a and 5a are formed in the peripheral edge of the filled concrete 3. A so-called bolt box 6, which is a space for mounting a bolt, is provided at a corresponding position. A plurality of reinforcing members 11 are provided between the facing main girder plates 4 and 4 for increasing the mechanical strength of this segment against the stress in the axial direction of the drill hole.

The reinforcing member 11 comprises a pair of steel vertical plate members 13 and 13, and a pair of steel horizontal plate members 14 provided between the vertical plate members at both ends of the vertical plate members 13 and 13. 14 and each plate member is joined by welding or the like to form a rectangular shape. The reinforcing member 11 includes vertical plate members 13, 1
3 are arranged in the axial direction of the excavation hole, and the horizontal plate members 14, 14 are brought into contact with the inner surface sides of the main girder plates 4, 4, respectively, so that the main girder plates 4, 4,
Incorporated in between. The reinforcing member 11 is welded to the skin plate 1 at the lower edges of the vertical plate members 13, 13.

Further, the lateral plate member 14 of the reinforcing member 11 is formed with a hole 14a communicating with the bolt hole 4a formed in the main girder plate 4, and the hole 14a and the lateral plate member 14 are formed.
The segments are joined to each other by a bolt (not shown) inserted into the bolt hole 4a. A plurality of the reinforcing members 11 having the above-described configuration are provided in the frame body 9 at appropriate intervals from the one joint plate 5 to the other joint plate 5, and are embedded in the filling concrete 3.

The segment 30 as described above is manufactured as follows. First, the main girder plates 4 and 4 and the joint plates 5 and 5 are attached to the skin plate 1 at the periphery thereof.
Placed in an upright state with respect to the frame body 9 and joined by welding or the like.
Assemble Next, a pair of horizontal plate members 1 is previously provided between the vertical plate members at both ends of the pair of vertical plate members 13, 13.
A reinforcing member 11, which is formed in a rectangular shape by joining 4 and 14 by welding or the like, is installed between the main girder plates 4 and 4 so that the horizontal plate member 14 abuts the inner surface of the main girder plate 4, and this is a vertical plate member. 13,
Weld to skin plate 1 at the lower edge of 13.

Subsequently, concrete is poured into the concrete filling space S1 in the frame body 9 and hardened to form the filling concrete 3. The segment is completed as described above. At this time, concrete is not placed around the bolt holes 4a and 5a of the main girder plate 4 and the joint plate 5, and the bolt box 6 is formed by this. In addition, at the time of placing the concrete, the bolt hole 4a
The horizontal plate member 14 of the reinforcing member 11 and the main girder plate 4 are joined by inserting a bolt into the hole 14a.

In the segment 30 as described above,
Since the reinforcement member 11 is not welded to the main girder plate 4,
The main girder plate 4 is not deformed. Therefore, when constructing a tubular wall body using this segment, these main girder plates 4,
Even when stress is applied to the drilling hole 4 in the axial direction of the drilling hole, this stress is dispersedly applied in the lengthwise direction of the main girder plate 4 and is not locally concentrated. Therefore, breakage of the filled concrete 3 is unlikely to occur.

Further, the reinforcing member 11 is replaced by a pair of vertical plate members 1.
3, 13 and a pair of horizontal plate members 14 provided between these vertical plate members at both ends of these vertical plate members 13, 13.
And the vertical plate members 13, 13 are arranged in the axial direction of the excavation hole, and the horizontal plate members 14, 14 are the main girder plates 4,
Since the main girder plates 4 and 4 are assembled so as to be in contact with the inner surface side of the drilling member 4, the segment having the reinforcing member 11 has a sufficient mechanical strength against the stress in the axial direction of the drill hole. May be included.

In the manufacturing process of the segment 30, the joining position of the horizontal plate member 14 to the vertical plate member 13 of the reinforcing member 11 can be adjusted according to the distance between the main girder plates 4, 4. Therefore, it is not necessary to strictly set the length of the vertical plate member 13, and the manufacturing thereof becomes easy.

The segment of the present invention is not limited to the above, but various modifications are possible. The reinforcing member 21 shown in FIG. 4 is largely different from that of the above-described embodiment in that the plate-shaped wall members 17, 17 made of steel are provided between the vertical plate members 13, 13 at intervals from the horizontal plate members 14, 14. The point is that the box-shaped spaces S2 and S2 are provided. The segment having the reinforcing member 21 having the above-described configuration can easily form a bolt box by using the box-shaped space S2 as the bolt box 18 communicating with the bolt hole 4a formed in the main girder plate 4. . At the same time, it also has an effect that the reinforcing member 21 has higher strength.

Further, the reinforcing member 31 shown in FIG. 5 and FIG.
Is composed of a horizontal plate member 14 that is in contact with the inner surface sides of the main girder plates 4 and 4, and a pair of steel vertical triangular plate members 33 that are joined to the horizontal plate member 14 by welding or the like. . In the reinforcing member 31, the lower edge portions of the vertical plate members 33, 33 are welded and joined to the skin plate 1. Since such a reinforcing member 31 has a simple structure and is small in size, when the segment 40 having the reinforcing member 31 is manufactured, it is easy to handle when disposing the reinforcing member 31 in the frame 9. . It is also advantageous in terms of material cost.

Further, the reinforcing member 41 shown in FIG. 7 and FIG.
Is a horizontal plate member 14 that is in contact with the inner surface side of the main girder plate 4, a pair of rectangular vertical plate members 43 and 43 that are joined to the horizontal plate member 14 by welding or the like and are provided at intervals. A wall member 4 provided between the plate members at a distance from the horizontal plate member 14.
7 and a box-shaped space S3 is formed by them. Reinforcing member 4 having the above configuration
In the segment 50 having 1, the box-shaped space S3 is
By using the bolt box 19 communicating with the bolt holes 4a formed in the main girder plate 4, the bolt box can be easily formed. The shape of the vertical plate material is not limited to that of the above-described embodiment, and may be any shape.

[0023]

In the segment of the present invention, since the main girder plate is not welded, the main girder plate is not deformed. Therefore, even when stress is applied to these main girder plates in the axial direction of the excavation hole when constructing a tubular wall body using this segment, this stress does not locally concentrate. Breaking of stuffed concrete is less likely to occur. In addition, between the main girder plates facing each other, a pair of horizontal plate members respectively abutting on the inner surface side of these main girder plates, and these horizontal plate members are connected to each other, and the longitudinal plate arranged in the axial direction of the drilling hole. Since the reinforcing member composed of the plate material is provided, it can have sufficient mechanical strength.

Further, by forming the reinforcing member into a rectangular shape in a plan view by a pair of vertical plate members and a pair of horizontal plate members, it is possible to obtain higher mechanical strength. Further, the bolt box can be easily formed by providing a plate-shaped wall member between the vertical plate members of the reinforcing member with a distance from the horizontal plate member to form a box-shaped space. At the same time, the reinforcing member can be made stronger.

Further, a reinforcing member composed of a horizontal plate member and a vertical plate member joined to the horizontal plate member is provided on the inner surface side of the main girder plate, and the vertical plate member is joined to the skin plate. This facilitates the production of the segment having the reinforcing member. It is also advantageous in terms of material cost.

Further, the reinforcing member is provided with a horizontal plate member which is in contact with the inner surface side of the main girder plate, a pair of rectangular vertical plate members which are joined to the horizontal plate member at intervals, and between these vertical plate members. The bolt box can be easily formed by providing the wall member with a space from the horizontal plate member to form the box-shaped space. At the same time, the reinforcing member can be made stronger.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a segment according to an embodiment of the present invention.

FIG. 2 is a plan view showing the segment shown in FIG.

3 is a perspective view showing a reinforcing member of the segment shown in FIG. 1. FIG.

FIG. 4 is a perspective view showing a reinforcing member of another embodiment of the segment of the present invention.

FIG. 5 is a perspective view showing a reinforcing member of still another embodiment of the segment of the present invention.

6A and 6B are diagrams showing a joined state of the reinforcing member shown in FIG. 5, in which FIG. 6A is a side view and FIG. 6B is a plan view.

FIG. 7 is a perspective view showing a reinforcing member of still another embodiment of the segment of the present invention.

8A and 8B are diagrams showing a joined state of the reinforcing member shown in FIG. 7, in which FIG. 8A is a side view and FIG. 8B is a plan view.

FIG. 9 is a perspective view showing an example of a conventional segment.

10 is a plan view showing the segment shown in FIG. 9. FIG.

[Explanation of symbols]

 1 ... Skin plate 3 ... Concrete 4 ... Main girder plate 4a ... Bolt hole 5 ... Joint plate 9 ... Frame body 11, 21, 31, 41 ... Reinforcing member 13, 33, 43 ... Vertical plate material 14 ... Horizontal plate material 17, 47 ... Wall material 18, 19 ... Bolt box 30, 40, 50 ... Segment S2, S3 ... Box-shaped space

Claims (5)

[Claims] 1. A segment which is provided around the axis of an excavation hole and which is continuously provided in the axial direction to form a cylindrical wall body, the segment being adjacent to the periphery of the skin plate in the axial direction of the excavation hole. Main girder plate that forms a joint surface with a matching segment, and concrete is filled inside the box-shaped frame body in which a joint plate that forms a joint surface with adjacent segments in the circumferential direction around the axis is set up. A reinforcing member is provided between the facing main girder plates, and the reinforcing member forms a pair of horizontal plate members that abut against the inner surface sides of the facing main girder plates, respectively. A segment comprising a vertical plate member connected to each other and arranged in the axial direction of the excavation hole. 2. The reinforcing member is formed in a rectangular shape in plan view by a pair of vertical plate members and the pair of horizontal plate members provided between the vertical plate members at both ends of the vertical plate members. The segment according to claim 1, wherein: 3. A box-shaped space is formed between the pair of vertical plate members with a distance from the horizontal plate member to form a box-shaped space, and the box-shaped space is formed in the main girder plate and is segmented. 3. A bolt box communicating with a bolt hole through which a bolt for joining the bolts is inserted.
The described segment. 4. A segment which is provided around the axis of an excavation hole and which is continuously provided in the axial direction to form a tubular wall body, the segment being adjacent to the peripheral edge of the skin plate in the axial direction of the excavation hole. Main girder plate that forms a joint surface with a matching segment, and concrete is filled inside the box-shaped frame body in which a joint plate that forms a joint surface with adjacent segments in the circumferential direction around the axis is set up. Reinforcing members are provided respectively on the inner surface sides of the main girder plates facing each other, and the reinforcing members are joined to the horizontal plate member abutting on the inner surface side of the main girder plate, A segment which is arranged in the axial direction of the hole and is composed of a vertical plate member joined to the skin plate. 5. A pair of the vertical plate members are provided with a space between them, and a wall member is provided between the vertical plate members with a space between the vertical plate members to form a box-shaped space. The bolt box is formed in the main girder plate and communicates with a bolt hole through which a bolt that joins the segments is inserted.
The described segment.