JPH0711895A - Assembling method of segment for shield - Google Patents

Abstract

PURPOSE:To facilitate the assembly work of a segment piece and the connecting work of a segment ring. CONSTITUTION:A segment piece connecting body A, in which the outer circumferential end sections of adjacent segment pieces 1 are coupled by hinges 2, is carried into a facing, and formed in a circular shape, and the segment ring A is assembled by joint fittings 3a, 3b. The annular projecting section 10 of an anew constructed ring RA is engaged with the annular recessed section 11 of an existing ring RA1, and both rings RA, RA1 are coupled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of assembling a shield segment used when constructing a pipe by a shield method.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 12, a segment used in a shield construction method comprises a plurality of (six in the illustrated example) segment pieces 20 carried into a face and assembled into a cylindrical shape by an erector of a shield machine. The ring 21 is formed. Then, as shown in FIG. 13, it is connected to the existing segment ring 21A.

[0003]

In the conventional segment, since a large number of segment pieces 20 are carried in and assembled to a face, positioning of the segment pieces 20 and assembly work of the segment pieces 20 by bolt connection and segment joints by bolt connection are carried out. Connection work is complicated and workability is poor.

It is an object of the present invention to provide a method of assembling a shield segment that facilitates the assembly work of segment pieces and the connection work of segment rings.

[0005]

According to the method of the present invention, a row-shaped segment piece connecting body, in which ends of adjacent segment pieces are connected to each other by hinge means in advance, is carried into a face and formed into a cylindrical shape to face each other. After connecting the end faces to be joined by the joint means, each segment piece is circularly held by the circular holding means to form a segment ring, and the segment ring is connected to the existing segment ring by the segment ring joint means.

It is preferable that the hinge means is a hinge that connects the outer or inner peripheral end of the segment piece.

The circular holding means is preferably composed of a hole or groove formed in the segment piece and a wire, PC steel wire or the like suitable for applying a tension for inserting the hole or groove.

Further, it is preferable that the joint means is composed of a joint fitting.

Further, the segment ring connecting means is composed of mutually engaging annular protrusions and annular recesses formed at opposite ends, holes and wires for connecting several segment rings, or long members and bolts. Preferably.

[0010]

In the present invention, the segment piece connecting bodies connected in rows are formed in a circular shape, and the ends are connected by the joint fittings to assemble the segment pieces to form the segment ring. Then, for example, the annular projection is engaged with the annular recess to connect the segment rings to each other. Therefore,
Since there are no or very few conventional bolt connections,
The workability of the segment piece assembly work and the segment ring connection work is greatly improved.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of a segment piece connecting body embodying the present invention. This connecting body A is formed in a row by connecting adjacent inner peripheral edges of a plurality (eight in the illustrated example) of segment pieces 1 with a hinge fitting 2 which is a hinge means. Then, on the end faces 1a of the leading and trailing segments 1, joint fittings 3a and 3b, which are joint means, are provided. Reference numeral 4 in the drawing is a hole through which a wire 5 described later passes.

The connecting body A is formed into a cylindrical shape at the face as shown in FIG. 2, and the joint fittings 3a and 3b are connected to each other. Then, as shown in FIG. The wire 5 is inserted, and tension is applied to hold the segment ring R in a circular shape. The wire 5 may be made of PC steel wire or other material suitable for applying tension. Further, it is preferable that the holes 4 and the wires 5 be provided in multiple layers in multiple rows or in the same concentric circle.

FIG. 4 shows another embodiment of the circular holding means,
In this example, the T-shaped groove 4a and the two wires 5 are used.

FIG. 5 also shows another embodiment of the circular holding means,
This is an example of an L-shaped groove 4b and a single wire 5.

FIG. 6 shows another embodiment of the segment piece connecting body. In this segment body connecting body A1, the hole 4 is formed.
The wire 5 is inserted in advance. In this embodiment, it is possible to save the labor of passing the wire 5 at the time of assembly.

FIG. 7 also shows another embodiment of the segment piece connected body. In this segment piece connected body A2, three points of the outer peripheral edges of the segments 1, 1 ... 3 points on the edge are connected by a hinge 2a, and 2
Layer holes 4 are provided. In this embodiment, it is possible to set the packing shape of the connecting body A2 at the time of loading relatively freely.

FIG. 8 shows an example of the manner in which the segment rings are connected to each other. An annular protrusion 10 is formed on one end surface of the segment ring RA, and an annular recess 11 is formed on the other end surface thereof in the axial direction, and the both portions 10 and 11 constitute a segment ring joint means. Then, the annular projection 10 of the new ring RA is engaged with the annular recess 11 of the existing ring RA1, and both rings RA, RA
1 is connected.

FIG. 9 also shows another connection mode of the segment rings, and the annular projection 1 formed on the outer circumference of the new ring RB.
0a formed on the inner circumference of the existing ring RB1
This is an example in which both rings RB and RB1 are connected by engaging with a.

FIG. 10 also shows another connection mode of the segment rings, and shows the new ring RC and the existing rings RC1 and RC.
In the example in which the connecting wires 13 are inserted into the holes 12 formed over the existing rings before 2 and the end metal parts 14 are fixed to both ends of the wires 13 to connect only the rings RC, RC1 or RC2. is there.

FIG. 11 also shows another connection mode of the segment rings, and an example in which a long member 15 such as a shaped steel is applied to the inner surfaces of the new ring RD and the existing ring RD1 and the two rings RD, RD1 are connected by bolts 16. Is. Of course, the conventional connection method using the bolt A may be used.

[0022]

As described above, according to the present invention, the assembling work of the segment pieces and the connecting work of the segment rings can be facilitated, the assembling work can be improved, and the construction period can be shortened.

[Brief description of drawings]

FIG. 1 is a front view showing an example of a segment piece connected body for carrying out the present invention.

FIG. 2 is a front view showing a segment ring obtained by assembling the connection body of FIG.

3 is a cross-sectional view taken along line XX of the circular holding means of FIG.

FIG. 4 is a drawing corresponding to FIG. 3, showing another example of the circular holding means.

FIG. 5 is a drawing corresponding to FIG. 3, showing another example of the circular holding means.

FIG. 6 is a front view showing another example of the segment ring connected body for carrying out the present invention.

FIG. 7 is a front view showing another example of the segment ring connected body for carrying out the present invention.

FIG. 8 is a side sectional view showing an example of a connection mode of segment rings.

FIG. 9 is a side sectional view showing another example of the connection mode of the segment rings.

FIG. 10 is a side cross-sectional view showing another example of the connection mode of the segment rings.

FIG. 11 is a side sectional view showing another example of the connection mode of the segment rings.

FIG. 12 is a front view illustrating an assembly mode of a conventional segment ring.

FIG. 13 is a side view of FIG.

[Explanation of symbols]

A, A1, A2 ... Segment piece connected body R, R1 ... Segment ring RA, RB, RC, RD ... Newly installed segment ring RA1, RB1, RC1, RC2, RD1 ... Existing segment ring 1, 20 ... Segment pieces 2, 2a ... Hinge 3a, 3b ... Joint fitting 4 ... Hole 4a ... T-shaped groove 4b ... L-shaped groove 5, 13 ... Wire 10 10a ... Annular protrusion 11, 11a ... Annular recess 12 ... Hole 14 ... End fitting 15 ... Long member 16 ... Bolt

Claims (1)

[Claims] 1. A column-shaped segment piece connected body in which end portions of adjacent segment pieces are connected in advance by a hinge means is carried into a face, formed into a cylindrical shape, and opposing end surfaces are connected by joint means, A method for assembling a shield segment, characterized in that each segment piece is held in a circular shape by a circular holding means to form a segment ring, and the segment ring is connected to an existing segment ring by a segment ring joint means.