JPH086872Y2 - Concrete segment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial field of application" The present invention relates to a concrete segment generally in the shape of an arc, which is used, for example, when constructing a tunnel lining body.

"Prior art" To construct a railway tunnel lining body, while excavating the ground using a cylindrical shield excavator, along with the inner surface of this excavation pit, the arc plate is supported by an erector. A shield method has been widely used in which the concrete segments are joined to each other and connected.

In the concrete segment, generally, a joint fitting for connection is embedded in the joint end surface of a segment body made of concrete formed in an arc plate shape, and at the center thereof, a suspending tool provided in the erector. Has a structure in which a hanging metal fitting that is engaged with is embedded, and the hanging tool of the erector can be engaged with the hanging metal fitting and supported by the erector.

"Problems to be solved by devices" In recent years, along with the increase in size and depth of tunnels to be built, there has been a demand for the development of automatic assembly technology that automates the work of connecting concrete segments together. As described above, a technique for automating a series of work for supporting a concrete segment by an erector to assemble it on the inner surface of the pit and then connecting the joint fittings is required for the concrete segment. .

[Means for Solving the Problems] The present invention has been made to solve the above problems, and is supported by the erector along the circumferential direction and the axial direction with respect to the inner surface of the drill hole having a substantially circular cross section. Assembled,
And, in the concrete segment forming the lining body of the excavation hole by being connected to each other, the segment main body formed in an arc plate shape, the joint fitting embedded in the joint end face of the segment main body, the center of the segment main body A suspension metal fitting that is embedded in the erector and is engaged with the suspension fitting, and further, a state in which the suspension fitting is engaged with the suspension fitting on the inner surface of the segment main body around the suspension fitting. In addition, a recess having a tapered inner peripheral surface that fits into a truncated cone-shaped fitting protrusion provided on the erector is formed.

[Operation] According to the concrete segment of the present invention, by fitting the fitting protrusion of the erector into the recess of the segment,
Since the set position of the segment with respect to the erector is always constant and the segment is held stably, the segment can be safely moved by the erector.

Further, since the positional relationship between the erector and the segment is constant, the assembly of the segment with respect to the inner surface of the digging hole can be automated by the erector,
The coordinates of each joint fitting based on the erector can be obtained, and the connecting work between the joint fittings can be automated based on the coordinates.

Also, the structure is such that the frustoconical fitting protrusion of the erector is fitted into the recess having the tapered inner peripheral surface and positioned, so that the fitting protrusion can be easily fitted into the recess. In addition, the segment can be positioned in the entire circumferential direction.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a concrete segment of the present embodiment, and 2 denotes an erector that supports a concrete segment (hereinafter abbreviated as a segment) 1 and is mounted on the inner surface of an excavation pit.

The segment 1 is used for constructing a tunnel lining body by being joined and connected to each other. As shown in FIGS. 1 and 2, the segment body is formed in an arc plate shape and has a constant thickness. 3, a joint fitting 4 embedded in each joint end surface 3a of the segment body 3, and a suspension fitting 5 embedded in the center of the segment body 3.

A plurality of joint fittings 4 are symmetrically embedded in each joint end face 3a, and a recess 6 of an appropriate size is formed in the segment body inside these joint fittings 4.

The hanging metal fitting 5 is formed by threading the inner peripheral surface of a cylindrical pipe and penetrates in the thickness direction of the segment main body 3, and the hollow portion thereof attaches the segment 1 to the inner surface of the excavation pit. After that, it is used as a grout hole 7 when mortar or the like is injected between the inner surface of the excavation pit and the outer surface (convex side surface) 3b of the segment body 3 to backfill.

On the other hand, the erector 2 has an arc plate-shaped erector body 8 along the inner surface (concave surface) 3c of the segment body 3.
And a suspending tool 9 embedded in the center of the outer surface (convex surface) 8a of the erector body 8 and extending toward the outer surface side in the thickness direction of the erector body 8.

The suspending tool 9 is of a bolt shape that can be screwed into the suspending fitting 5 of the segment 1, and by screwing the suspending tool 9 into the suspending fitting 5, the segment 1 is supported by the erector 2 and turns, It is designed to be moved and assembled to the inner surface of the pit.

By the way, on the outer surface 8a of the erector body 8 and on the line in the circumferential direction of the erector body 8 passing through the suspending tool 9, a pair of fitting projections 10 are formed with the suspending tool 9 interposed therebetween. These fitting protrusions 10 are equidistant from each other from the suspending tool 9, and their shape is a conical shape with a flat tip.

And the segment body 3 in the segment 1
On the inner surface 3c of the erector 2, when the suspending tool 9 of the erector 2 is screwed into the suspending metal fitting 5 of the segment 1 and is joined along the segment 1, the fitting projections 10 are fitted into the recesses so as to fit perfectly. Place 11
Are formed. That is, as shown in FIG. 3, these recesses 11 are formed so that the fitting projections 10 can be fitted to each other and have a flat bottom surface in the shape of an inverted cone, and they are positioned so as to sandwich the hanging fitting 5.

According to the above-mentioned segment 1, when supporting by the erector 2, the suspending tool 9 of the erector 2 is screwed into the suspending metal fitting 5 of the segment 1, and each fitting protrusion 10 is formed in the recess 11.
To fit. In this state, the segment 1 is swung and moved by the erector 2 and assembled to the inner surface of the excavation pit. Incidentally, FIG. 4 shows a front view of the lining body 1A formed of the segments 1.

By fitting the fitting protrusion 10 of the erector 2 into the recess 11 of the segment 1,
Since the set position of is always constant and the segment 1 is stably held by the erector 2, the turning and moving work by the erector 2 can be performed safely. Further, since the positional relationship between the erector 2 and the segment 1 is constant, the assembly of the segment 1 with respect to the inner surface of the excavation hole can be automated by the erector 2, and the coordinates of the joint fittings 4 with the erector 2 as a reference. Based on this, the bolting work between the joint fittings 4 can be automated.

[Advantage of the Invention] As described above, according to the concrete segment of the present invention, the concrete segment of the present invention is assembled and connected to the inner surface of the drill hole having a substantially circular cross section while being supported by the erector along the circumferential direction and the axial direction. In the concrete segment forming the lining body of the excavation hole, the segment main body formed in an arc plate shape, the joint fitting embedded in the joint end face of the segment main body, and embedded in the center of the segment main body And a suspending metal fitting with which a suspending tool included in the erector engages, and further, the erector in the state in which the suspending tool is engaged with the suspending metal on an inner surface of the segment main body around the suspending metal fitting. It is characterized in that a recess having a tapered inner peripheral surface that fits into a truncated cone-shaped fitting protrusion provided on the ridge is formed. By fitting in the recess of the segment, the set position of the segment with respect to the erector is always constant and the segment is held stably, so that the segment can be safely moved by the erector, and Since the positional relationship between the fittings is constant, the assembly of the segment to the inner surface of the excavation hole can be automated by the erector, and the coordinates of each joint fitting based on the erector are obtained, and based on this, the joint fittings are connected. The work can be automated, and it is extremely useful for automatically assembling the lining body.

Further, the structure is such that the truncated conical fitting protrusion of the erector is fitted into the recess having the tapered inner peripheral surface and positioned, so that the fitting protrusion can be easily fitted into the recess. In addition, the segment can be positioned in the entire circumferential direction.

[Brief description of drawings]

1 to 4 are views showing an embodiment of the present invention, wherein FIG. 1 is a side view showing the concrete segment and erector thereof, FIG. 2 is an inner view of the concrete segment, and FIG. 4 is a front view of a tunnel lining body constructed by the concrete segment of one embodiment, and FIG. 1 ... Concrete segment, 1A ... Lining body, 2 ...
Electa, 3 segment body, 4 fittings, 5
...... Hanging metal fittings, 9 ...... Hanging equipment, 10 ...... Mating protrusions, 11 ...... Recesses.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Noriomi Yasuhara 1-25-1 Nishishinjuku, Shinjuku-ku, Tokyo Within Taisei Corporation (72) Inventor Koichiro Adachi 7-23, Nishigotanda, Shinagawa-ku, Tokyo No. 1 Taisei Press Co., Ltd. (72) Inventor Yoshitaka Hachisuka Marunouchi 2-chome, 5-1, Chiyoda-ku, Tokyo Sanryo Heavy Industries Co., Ltd. (72) Inventor Hirohide Hashimoto 2-6 Yaesu, Chuo-ku, Tokyo No. 21 Rose Bay Yaesu Building Ishikawajima Kenzai Co., Ltd. In-house (56) Bibliography 4-22595 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A concrete segment which is assembled to an inner surface of a drill hole having a substantially circular cross section while being supported by an erector along the circumferential direction and the axial direction, and is connected to each other to form a lining body of the drill hole. In, a segment main body formed in an arc plate shape, a joint metal fitting embedded in a joint end face of the segment main body, and a suspension metal fitting which is embedded in the center of the segment main body and which is attached to the erector And further, on the inner surface of the segment main body around the hanging fitting, fits a truncated cone-shaped fitting projection provided on the erector in a state where the hanging tool is engaged with the hanging fitting. A concrete segment characterized in that a recess having a tapered inner peripheral surface is formed.