JP2002021489A - Manufacturing method for compound segment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a concrete gutter accurately and easily together with the placement of concrete to the inner surface and outer periphery of the compound segment when manufacturing compound segments. SOLUTION: In the manufacturing method for a compound segment filled with concrete in a hollow space inside of a steel shell 1 surrounded by splice plates 3 and 3 having splice bolt holes 2, 2, etc., main girders 4 and 4 as well as a skin plate 5 at the outer periphery; plates 11, 11, 11 and 11 to be projected out by a predetermined length to the outside of the steel shell 1 at a right angle from the upper portion of the splice plates 3 and 3 and the upper portion of the main girders 4 and 4 are attached to the splice bolt holes 2, 2, etc., in a freely detachable manner and the splice plates 3 and 3 and the main girders 4 and 4 and the plates are arranged to the whole periphery along the main girders 4 and 4, concrete is filled up to the top surface of the plate 11 inside the steel shell 1, thereafter, the plates 11 are removed and concrete gutters are formed along the outer periphery of the concrete.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a synthetic segment, and more particularly to a method for manufacturing a synthetic segment in which a concrete groove can be easily and accurately formed on the inner peripheral surface of the segment while the concrete is being poured. It relates to a manufacturing method.

[0002]

2. Description of the Related Art As shown in FIG. 6 (a), a conventional synthetic segment is a main girder 4 composed of a skin plate 5 provided on an outer peripheral side in an arc shape and steel plates provided on both sides of the skin plate 5. , 4 and joint plates 3, 3 arranged at both ends of the skin plate 5, constitute a steel shell 1 having a plurality of reinforcing bars 6, 6,... And a grout injection pipe 7 in the center. Arrange. Further, the joint plates 3, 3 are provided with joint bolt holes 2, 2 for assembling the respective segment pieces in a ring shape in the circumferential direction, and the segment rings are also connected to the main beams 4, 4. Bolt holes 2, 2, 2 are provided.

After that, as shown in FIG. 6 (b), concrete 10 is filled into the inside of the steel shell 1 from a mixer truck (not shown) or the like to produce a composite segment. At this time, the joint bolt holes 2, 2 of the joint plates 3, 3 and the main girders 4, 4
A bolt box (not shown) in the steel shell 1 corresponding to ...
Are provided, and bolt operation spaces 8, 8,... Are provided. or,
After the concrete 10 is filled, the concrete on the inner surface of the composite segment is iron-finished based on the height of the joint plates 3 and 3 and the main girders 4 and 4, and is formed flush. Therefore, the inner surfaces of the steel shell 1 and the concrete 10 both have a flat structure.

[0004] Further, although not shown, a tunnel is constructed by assembling the composite segment into a cylindrical shape by an erector in the shield machine together with excavation of the ground by the shield machine. Assembled inside.

[0005]

As described above, since the inside of the tunnel is formed on the inner surface side of the composite segment, there is a danger that a substance such as water which corrodes the steel shells enters from the joint between the steel shells. Occurs and it is necessary to perform rust prevention treatment.

Normally, if a secondary lining for spraying mortar or the like on the inside of the composite segment is performed in constructing the tunnel, the gap between the joints is filled, and the composite segment having a flat inner surface is used. There is no problem with using.

[0007] However, in recent years, when the synthetic segment is used for a secondary lining for internal water pressure, concrete in the steel shell is additionally struck in order to perform the rust prevention treatment, and concrete grooves (caulking grooves) are formed. Need to be formed. Forming the concrete grooves is a difficult task because there is no standard for concrete overfilling.

Therefore, there arises a technical problem to be solved in order to obtain a method of manufacturing a composite segment in which a concrete groove can be easily formed on the inner periphery of the inner surface of the segment together with the casting of concrete. An object is to solve the problem.

[0009]

SUMMARY OF THE INVENTION The present invention has been proposed in order to achieve the above object, and has a joint plate having a joint bolt hole, a main girder, and an inner space of a steel shell surrounding the outer periphery with a skin plate. In the method for manufacturing a composite segment in which concrete is filled into a joint, a plate for projecting a predetermined length out of the steel shell at right angles from the upper part of the joint plate and the main girder is detachably attached to the joint bolt hole. Then, after the joint plate and the main girder are disposed all around, the concrete is filled into the inside of the steel shell up to the upper surface of the plate, and then the plate is removed. A method for manufacturing a composite segment forming a concrete groove along the same, and when filling the steel shell with the concrete, a concrete holding plate is attached to the plate with a cotter above the plate and erected. Rutotomoni, in the vicinity of the joint plate is to provide a method of manufacturing a synthetic segments to provide a concrete inlet.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to FIGS. The same components as those of the conventional example will be described using the same reference numerals.

FIG. 1 is a perspective view of a steel shell 1 for manufacturing a composite segment. The steel shell 1 is composed of main plates 4 and 4 made of steel plates arranged at a predetermined interval in the ring direction with a skin plate 5 provided in an arc shape on the outer peripheral side and a joint plate made of steel plates arranged at a predetermined interval in the circumferential direction. 3 and 3. The side shapes of the main girders 4 and 4 have the same shape as the curvature of the skin plate 5, and stand upright with respect to the skin plate 5, and the joint plates 3 and 3 have a rectangular shape and a circular shape. It is erected in accordance with the joint shape in the circumferential direction. The main girders 4, 4 and the upper end face positions of the joint plates 3, 3 are formed at the same height.

In the vicinity of the upper portions of the main girders 4, 4, joint bolt holes 2, 2,... For connecting the respective composite segments in the ring direction are formed at predetermined intervals. Are formed at predetermined intervals in the vicinity of the upper part of the joint bolt holes 2, 2,... For connecting the respective composite segments in the circumferential direction.

Next, as shown in FIG.
4 and a steel plate 11 projecting a predetermined length out of the steel shell 1 at right angles from the upper portions of the joint plates 3 and 3.
2a (12b) and the bracket 12a (12b).
A bolt 13 (see FIG. 1) is inserted into the bolt hole drilled in b) and the joint bolt hole 2, and detachably attached to the main girders 4, 4 and the joint plates 3, 3, respectively. .

The bracket 12a uses an angle material and is fixed to the plate 11 in an L-shape. Also, the plate 11 is not used without using the bracket 12a (12b).
It may itself be formed in an L-shape.

Further, the thickness of the plate 11 is the same as the depth of a concrete groove (caulking groove) 15 described later,
The tip 11a of the plate 11 on the side of the steel shell 1 is tapered so as to have an opening at an upper portion in accordance with the shape of the concrete groove 15. Therefore, as shown in FIG.
The plate 11 is disposed on the entire periphery of the main girders 4 and 4 and the joint plates 3 and 3 which form the outer periphery of the joint. The plate 11 is not limited to steel and may be formed of a plastic material, wood, or the like.

FIG. 4A is an enlarged perspective view showing a state in which the plates 11, 11 are mounted on the main beam 4 and the joint plate 3.

When the brackets 12a (12b) are attached to the joint bolt holes 2, 2,..., A bolt operation space 8 is formed after the concrete 10 described below is poured into the steel shell 1. Bolt box 14 is attached and placed at the same time. The position of the upper surface of the bolt box 14 is the same as the upper surface 10a of the concrete 10 described later.

Next, a method of placing the concrete 10 into the steel shell 1 will be described with reference to FIG. First, the steel shell 1 on which the plate 11 is disposed is placed on a horizontal and parallel H
It is placed horizontally on the shape steels 21 and 21. Thereafter, a concrete holding plate 19 is mounted on the steel shell 1 except for a place where a hopper 16 described later provided at both ends of the joint plates 3 and 3 is provided. The concrete holding plate 19 is erected along the plates 11, 11 provided on the main girders 4, 4.
Both ends are fixed with cotters 20, 20,... Installed at predetermined locations on the plates 11, 11, to prevent runoff during concrete casting. It is preferable to apply a release agent to the inner surface of the concrete holding plate 19 before casting the concrete in order to facilitate removal.

Next, a hopper 1 for placing concrete
6 is installed near the joint plates 3 and 3. The hopper 16
The side plates 17a, 17a are erected in a substantially triangular shape so as to match the inner surfaces of the main girders 4, 4, respectively, and the front plate 17b is fixed between the side plates 17a, 17a so that the concrete holding plate 19 It is a simple one that stands upright and has concrete input ports 18 of a predetermined size opened in the upper and lower parts. Although the illustrated hoppers 16 are provided at both ends of the steel shell 1 in order to increase the concrete casting speed, only one side may be provided for small segments.

Concrete is poured from a mixer truck (not shown) or the like to the concrete inlet 18 into the concrete 1.
0 and charged into the steel shell 1, the hopper 16
Is removed, and the concrete 10 at the removed portion is leveled with a trowel or the like. Next, when the concrete 10 does not loosen to some extent, the cotters 20, 20,... Are removed and the concrete holding plate 19 is removed. Further, the plates 11, 11 ...
The concrete surface 10a (see FIG. 3) is leveled by a trowel or the like along the line. After a lapse of a predetermined time, the concrete surface 1
A rough finish of 0a is performed. Further, after a lapse of a predetermined time, the concrete surface 10a is semi-finished with a trowel. Further, after a lapse of a predetermined time, the plates 11, 11,... And the bolt boxes 14, 14,.

Accordingly, as shown in FIG. 4B, the concrete 1 is placed on the main girder 4 and the joint plate 3 as shown in FIG.
0 is a concrete groove (caulking groove) 15, which has been beaten by the plates 11 and 11 accurately and evenly to a predetermined height.
15 are formed. Next, on the next morning, the finished segment is transported to a curing station, where it is cured to complete a strong composite segment.

FIG. 5 is a perspective view of one piece of the completed composite segment, in which the concrete grooves 15, 15... Are formed on the outer periphery of the inner surface of the composite segment, and the main girder 4 and the joint plate 3 are formed. On the concrete 10 side of the joint bolt holes 2, 2,.
8 are formed. A grout injection pipe 7 is buried in the center of the synthetic segment.

Next, the composite segment is assembled in a ring shape behind a shield machine (not shown) to construct a cylindrical tunnel, and the main girders 4, 4 adjacent to the composite segment forming the tunnel are constructed. 3 (b), a concrete groove 15 is formed in the upper part of the joint plates 3, 3, and when the composite segment is used for internal water pressure-free secondary lining, the concrete groove 15 is formed. Is used as a caulking groove to perform rust prevention treatment.

The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified ones.

[0025]

As described above, according to the first aspect of the present invention, the joint plate forming the steel shell and the plate projecting a predetermined length outside the steel shell at right angles from the upper part of the main girder are arranged on the entire circumference. Since the concrete is filled with concrete, the concrete groove can be easily and accurately formed using the plate as a guide at the same time as the concrete is poured on the upper outer periphery of the steel shell.

Also, by changing the thickness, shape, etc. of the plate, a concrete groove having an arbitrary depth and shape can be formed. Further, since the plate is detachably attached to the main girder and the joint bolt hole of the joint plate and disposed, the joint girder hole of the main girder and the joint plate can be used as it is without being processed and attached. It is easy to remove and the plate can be diverted directly to the production of the next synthetic segment.

According to a second aspect of the present invention, in addition to the effects of the first aspect of the present invention, a concrete pressing plate is attached to the plate by a cotter on the upper portion of the plate and erected.
Since the concrete inlet is provided near the joint plate, concrete can be quickly filled in the steel shell, and concrete can be prevented from flowing out by the concrete holding plate, and the concrete inner surface shape can be easily formed. .

Thus, concrete grooves can be easily and accurately formed on the outer peripheral portion of the inner surface of the composite segment, and the concrete grooves can be used as caulking grooves. is there.

[Brief description of the drawings]

1 shows an embodiment of the present invention and is a perspective view of a steel shell for producing a composite segment.

FIG. 2 is a perspective view of a steel shell showing a state in which concrete is filled in the steel shell.

FIG. 3 (a) shows the state of attachment of a plate.
Sectional view. (B) is a cross-sectional view of the joint portion of the synthetic segment, showing the details of the mouth in FIG.

FIG. 4A is a partially cutaway perspective view showing a mounting state of a plate. (B) A partially cutaway perspective view showing the state of formation of a concrete groove.

FIG. 5 is a perspective view of a synthetic segment.

FIG. 6A is a perspective view of a conventional steel shell. (B) A perspective view of a conventional synthetic segment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Steel shell 2 Joint bolt hole 3 Joint plate 4 Main girder 5 Skin plate 10 Concrete 11 Plate 15 Concrete groove 18 Concrete inlet 19 Concrete holding plate 20 Cotta

Continued on front page F-term (reference) 2D055 BA01 BB01 EB05 EB10 GD05 KA00 KB04 4G053 AA01 BB09 BD04 4G058 GA01 GB02 GC03 GE06 GF00

Claims (2)

[Claims] 1. A method for manufacturing a composite segment comprising a joint plate having a joint bolt hole, a main girder, and a concrete shell filled with concrete inside a steel shell surrounding the outer periphery with a skin plate. A plate for projecting a predetermined length out of the steel shell at a right angle from the upper part of the girder is detachably attached to the joint bolt hole, and disposed around the joint plate and the main girder all around. A method for manufacturing a composite segment, comprising: filling a concrete inside a steel shell up to an upper surface of the plate; removing the plate; and forming a concrete groove along an outer periphery of the concrete. 2. When the concrete is filled in the inside of the steel shell, a concrete holding plate is attached to the plate with a cotter on the plate and erected, and a concrete inlet is provided near the joint plate. The method for producing a synthetic segment according to claim 1, wherein the composite segment is provided.