JP3140979B2 - Concrete plate, tunnel lining, and method of manufacturing concrete plate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete slab, a tunnel lining body, and a method for manufacturing a concrete slab used for a mountain tunnel, a self-standing tunnel similar to a mountain tunnel.

[0002]

2. Description of the Related Art Conventionally, in mountain tunnels, after completion of excavation of a face, mainly a steel support using shotcrete, rock bolts, H-section steel, etc., in order to secure required cavity space and work safety. Tunnel support is performed by appropriately selecting and combining support members such as.

[0003] However, spraying concrete works,
In other words, in the construction method in which a concrete material is blown onto rock or the like by pressurized air, it is necessary to take various measures to ensure the safety of the human body due to the rebound of dust and coarse aggregate. In addition, in the above-mentioned tunnel shoring work, design changes such as change of shoring pattern and adoption of auxiliary construction method are performed at any time depending on the condition of the ground, and the process tends to be unstable due to unexpected trouble such as collapse or spring water. .

Further, the concrete lining body currently used in the shield method requires a joint bolt, a joint fitting, a bolt box and the like for fastening a joint. In addition, since all of the above-mentioned concrete lining bodies are manufactured using a mold, accuracy and durability of the mold are required, so that it takes time and costs. In addition, since the total number of molds is limited, the production speed of the concrete lining body also decreases.

[0005]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above, and it is an object of the present invention to provide a concrete plate piece and a tunnel lining body which have high safety and can be quickly constructed. , And a method of manufacturing a concrete plate piece.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and is characterized by the following constitution. That is, according to the present invention,
A concrete plate piece having a substantially square shape in a plan view and having a substantially arc-shaped cross section, four sides of which are framed by steel members, and which is substantially orthogonal to at least one of these steel members. A number of guide plates are partially protruded at intervals in the direction, and concrete pieces are provided in which the frame is filled with concrete.

Further, according to the present invention, there is provided a concrete plate piece in which a reinforcing member is interposed in the concrete plate piece.

In addition, the concrete plate piece is provided with a tubular member for supporting an erector or injecting a backfill material at a central portion thereof, and the cylindrical member has an axial dimension that is equal to the thickness dimension of the concrete plate piece. It is characterized by being formed substantially identically.

According to the present invention, claims 1 to 3 are provided.
The tunnel lining body which combined the concrete plate piece of any one of the above is provided.

Further, according to the present invention, a steel frame body having four sides framed by a steel member partially provided with a guide plate at least one of which is spaced apart is provided with an arc-shaped member. A concrete plate manufacturing method characterized by manufacturing a concrete plate by fixing it on an arc-shaped surface of a gantry, casting concrete in the frame, and solidifying the concrete.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the tunnel lining body of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, a tunnel lining body 1 has an arc-shaped member 2 as five concrete plate pieces and an arc-shaped member as one concrete piece smaller than these arc-shaped members 2. 8 are combined in a cylindrical shape, and a plurality are provided in the axial direction according to the scale of the tunnel.

As shown in FIG. 3, the arc-shaped member 2 is rectangular in plan view, and has a substantially arc-shaped concrete section cut along a longitudinal direction (horizontal direction in FIG. 3) as shown in FIG. It has a plate 3. As shown in FIG. 3, a horizontal frame 4 as a steel member is provided at each of both ends in the width direction (vertical direction in FIG. 3) of the concrete plate 3, and a steel member is formed at each of both ends in the longitudinal direction. Vertical frame 5 is provided.

That is, as shown in FIG. 5, each horizontal frame 4 is made of angle iron, and its longitudinal dimension is substantially the same as the longitudinal dimension of the concrete plate 3.
A is in contact with each of both ends in the width direction of the bottom surface 3A of the concrete plate 3 over substantially the entire length of the concrete plate 3 in the longitudinal direction. That is, the bottom side 4A is curved along a substantially arc-shaped cross section of the concrete plate 3.

The side pieces 4B of each horizontal frame 4 are in close contact with substantially the entire side surfaces 3B at both ends in the width direction of the concrete plate 3.

Further, each horizontal frame 4 is provided with a concrete plate 3
The four reinforcing members 7 made of flat steel shown in FIG. 3 provided at intervals in the longitudinal direction are fixed to and connected to both ends in the longitudinal direction (vertical direction in FIG. 3).
Note that the reinforcing member 7 may be formed of a shaped steel instead of the flat steel. A guide plate 9 is fixed to one of the horizontal frames 4, that is, the lower horizontal frame 4 in FIG.

That is, as shown in FIG. 5, the guide plate 9 is made of angle iron, and its mounting piece 9A is mounted on the inner side of the side piece 4B of the horizontal frame 4 by welding.
Protrudes outward in a state orthogonal to the side piece 4B of the horizontal frame 4. As shown in FIG. 3, the guide plates 9 are provided at three places at intervals along the longitudinal direction of the horizontal frame 4. The guide piece 9B has a function of easily and reliably positioning the other arc-shaped member 2 when assembling it in the axial direction of the concrete lining 1. The guide plate 9 may be provided not only on the upper side but also on the lower horizontal frame 4.

The number of guide plates 9 provided on the horizontal frame 4 is not limited to three, but is preferably increased or decreased according to the dimensions of the horizontal frame 4 or the like. By appropriately setting the number of the guide plates 9, the function as the positioning member can be sufficiently exhibited.

As shown in FIG. 4, each of the vertical frames 5 is made of angle iron, similarly to the horizontal frame 4, and its longitudinal direction (the direction perpendicular to the plane of FIG. 4) is the width direction of the concrete plate 3. The dimensions are substantially the same, and the bottom piece 5A is in contact with each of both longitudinal ends of the bottom surface 3A of the concrete plate 3. The side pieces 5B of each vertical frame 5 are in close contact with substantially the entire side surfaces 3B at both ends in the longitudinal direction of the concrete plate 3.

A guide plate 37 made of angle steel is attached to one of the vertical frames 5 like the guide plate 9. That is, the attachment piece 37A of the guide plate 37 is attached by welding to the inside of the side piece 5B of the vertical frame 5, and the guide piece 37B protrudes outward in a state orthogonal to the side piece 5B of the vertical frame 5. The vertical frame 5 is welded so as to be orthogonal to the side pieces 5B and partially project outside the vertical frame 5. As shown in FIGS. 1 and 3, the guide plates 37 of the vertical frame 5 are provided at two places with an interval.
By providing the guide plate 37 on the vertical frame 5 in this manner, when assembling the concrete lining body 1, the positioning of the arc-shaped members 2 adjacent to each other along the circumferential direction becomes easy and reliable. The number of guide plates 37 provided on the vertical frame 5 is also preferably determined from the viewpoint that the positioning function is sufficiently exhibited, as in the case of the horizontal frame 4.
It should be increased or decreased as appropriate.

As shown in FIG. 3, a tubular member 10 is provided at the center of the concrete plate 3. As shown in FIG. 4, the tubular member 10 is a tubular member reinforcing member 13 formed by combining a pair of substantially U-shaped members 13A and 13B.
And is buried in the concrete plate 3 while being held. The cylindrical member 10 is formed so that its axial dimension is substantially the same as the thickness of the arc-shaped member 2, and both end surfaces in the axial direction are substantially flush with the upper and lower surfaces of the arc-shaped member 2. Then, a through-hole 10A penetrating the arc-shaped member 2 vertically is formed. And this through-hole 10A is
When assembling the tunnel lining body 1, the projecting portion 26 </ b> A of the erector 26 shown in FIG. 20 is inserted and functions as an injection hole at the time of backfill injection.

As shown in FIG. 4, a reinforcing member 11 is embedded in the concrete plate 3 over substantially the entire surface thereof along the plane shape of the concrete plate 3. This reinforcing member 1
Numeral 1 is formed by forming a round bar, an iron wire or the like in a lattice shape, and uses a welding wire mesh. In the present embodiment, since the reinforcing member 11 is embedded in the concrete plate 3, the strength of the concrete plate 3 is improved, so that the concrete plate 3 can be prevented from cracking and can sufficiently resist external force during backfilling. There is.

In addition, as shown in FIG. 3, the concrete box 3 is provided with a lifting pipe 12 made of a vinyl chloride resin or steel for lifting while penetrating the side piece 4B of the horizontal frame 4.
One pair is embedded in each of both ends in the width direction of the concrete plate 3. When transporting the arc-shaped member 2, a lifting bracket (not shown) is inserted into the lifting box-opening pipe 12, and the arc-shaped member 2 is inserted through the lifting bracket.
Is to be transported.

The arc-shaped member 8 has dimensions in the left-right direction of FIG.
That is, except that the dimension of the arc member 8 in the direction along the arc shape is shorter than that of the arc member 2,
The configuration is basically the same as that of the arc-shaped member 2. Therefore, a member basically having the same configuration as the arc-shaped member 2
The same reference numerals are given and the description is omitted. As shown in FIG. 6, the arc-shaped member 8 has a substantially square shape in plan view, and a pair of reinforcing members 7 also shown in FIG. As described above, a pair of guide plates 37 made of angle irons are provided not only in one vertical frame 5 but also in the other vertical frame 5.

The one horizontal frame 4 of the arc-shaped member 8 has
A pair of guide plates 9 are provided. Arc-shaped member 8
The width in the direction (direction along the arc shape) is to spread each of the arc members 2 opposed to each other across the space S in FIG. 20 to insert the arc member 8 between the spaces S, as described later. It is preferable to be as small as possible. In addition, it is preferable to attach a sealing material to the outer periphery of each of the arc-shaped member 2 and the arc-shaped member 8 as necessary as a measure against spring water.

Next, a method of manufacturing the arc-shaped member 2 (arc-shaped member 8) will be described. First, the arc member manufacturing table 15 used for manufacturing the arc member 2 and the arc member 8 will be briefly described. As shown in FIG. 16, the arc-shaped member manufacturing table 15 is configured such that a gantry plate 14 is installed on an upper end of a gantry lower part 16.

That is, as shown in FIG. 17, the gantry lower part 16 has an H-shaped steel 17, and a plurality of H-shaped steels 17 are erected at intervals along the longitudinal direction and the width direction of the gantry plate 14. Have been. The gantry plate 14 has substantially the same shape and the same size as the bottom surface 2A of the arc-shaped member 2, and functions as a formwork when the concrete plate 3 is cast.
As the material of the gantry 14, concrete, wood, plywood, or the like can be used.

An angle steel 19 is interposed between the adjacent H-shaped steels 17. Further, an H-shaped steel 18 is fixed to the lower end of each of the H-shaped steels 17, and at the upper end and the intermediate part, Angle irons 20, 21 are fixed respectively. Also,
An angle iron 23 is interposed between the H-shaped steel 17 and the angle steel 21, and an angle iron 24 is interposed between the H-shaped steel 18 and the H-shaped steel 17.

The gantry plate 14 is provided on the upper end surface of the H-shaped steel 17 of the gantry lower part 16 configured as described above, and the arc-shaped member production pedestal 15 is constituted. In addition, the structure of the gantry lower part 16 is not limited to the above-mentioned structure, and may be any as long as it can support a load when the arc member 2 (the arc member 8) is manufactured.
The number of the arc-shaped member production tables 15 is equal to T shown in FIG.
An appropriate number is prepared in consideration of the excavation speed of the BM (rock tunnel excavator) 25, the required number of arc-shaped members 2 (arc-shaped members 8), and the like.

In manufacturing the arc-shaped member 2 and the arc-shaped member 8, a part excluding the concrete plate 3 of the arc-shaped member 2 and the arc-shaped member 8 is assembled in a factory. That is, the pair of horizontal frames 4 are connected to each other by the reinforcing member 7, and further, as shown in FIG. 3 (FIG. 6), the pair of vertical frames 5 are 4 to form a steel frame (hereinafter, a frame formed by assembling each of the horizontal frame 4, the vertical frame 5, and the reinforcing member 7 is referred to as a steel frame).

Since the steel frame may be simply assembled with the horizontal frame 4, the vertical frame 5, and the reinforcing member 7, it is easier to manufacture as compared with the conventional method of manufacturing a mold. The steel frame may be partially or wholly manufactured in the vicinity of the local start base.

As described above, the assembled steel frame is transported to the starting base. During this transportation, as described above, since the horizontal frames 4 are connected by the reinforcing members 7, the steel frames do not warp. Next, concrete is poured into the steel frame at or near the starting base.

That is, the steel frame is connected to the arc-shaped member manufacturing table 15.
As shown in FIG. 17, the reinforcing member 11 is placed on the bottom side 4A of the horizontal frame 4 and concrete is poured into the steel frame. Prior to the casting of the concrete, the lifting box pipe 12 is fixed to the horizontal frame 4. At the time of casting, the steel frame is fixed to the arc-shaped member manufacturing table 15 so as not to move.

In the present embodiment, as described above, since each of the horizontal frames 4 is connected by the reinforcing member 7, the steel frame is not distorted during concrete casting. Therefore, the arc-shaped member 2 and the arc-shaped member 8 can be manufactured with high dimensional accuracy. After the concrete is cast, after curing for about 24 hours, the mold is removed from the arc member manufacturing table 15 to obtain the arc member 2 (arc member 8) (see FIGS. 5 and 7). A predetermined number of arc-shaped members 2 (arc-shaped members 8) are manufactured in advance before tunnel excavation, and the production is performed in parallel with the excavation. Since the steel frame is fixed to the arc-shaped member production base 15 and cast concrete, the skin plate used as the mold can be omitted.

The tunnel lining 1 is manufactured by assembling the arc-shaped members 2 and 8 manufactured as described above. The production of the tunnel lining body 1 is performed by the TBM shown in FIG.
(Rocks tunnel excavator) 25 and the erector 2 shown in FIG. 20 provided in the tail plate 36 of the TBM 25.
6 (not shown in FIG. 18).

That is, the TBM 25 is provided with a cutter 28 having a cutter bit or a roller bit 27 attached to the tip, a driving device 29 for the cutter 28, a partition 30, a belt conveyor 31, and a propulsion jack 32. Further, in the present embodiment, as shown in FIGS. 20 and 21, a pair of arc-shaped member pushing and spreading devices 33 are provided in the tail plate 36 at intervals.

The arc-shaped member pushing / spreading device 33 includes a positioning jack 34 capable of extending and contracting in a horizontal direction (a direction perpendicular to the plane of FIG. 20), and a pushing-in jack 35 capable of extending and contracting in a substantially vertical direction. Each of the arc-shaped members 2 at the positions shown by imaginary lines facing each other across the space S in FIG. 20 is pushed substantially in the vertical direction when the push-out jack 35 is extended, and each is moved to the position shown by the solid line in FIG. It can be pushed out.

When assembling the tunnel lining body 1, first, the ground is dug by the TBM 25 shown in FIGS. That is, when the driving device 29 is driven, the cutter unit 28 is rotated via the drive shaft 29A, and the cutter unit 2 is rotated.
The ground is excavated by the cutter bit or roller bit 27 of FIG.

The excavated earth and sand is transported behind the TMB 25 by the belt conveyor 31. The tunnel lining body 1 is assembled behind the TBM 25 during the above-mentioned excavation or after excavation at a certain distance. This assembly, first,
All along the inner surface of the tail plate 36,
After assembling the five arc-shaped members 2, the arc-shaped member 8 is assembled in the space S between the arc-shaped members 2 by a method described later.

To move and assemble the arc-shaped member 2 to the assembling position, the insertion protrusion 26A of the erector 26 shown in FIG. Is done by moving The assembly of the arc-shaped member 2 is performed while positioning the guide members 9 and 37 from the lower side to the upper side. At this time, instead of the guide plate 9, a rod-shaped member may be inserted into the lifting box removal pipe 12 to serve as a guide during assembly.

To assemble the arc-shaped member 8, each of the arc-shaped members 2 at the position shown by the imaginary line in FIG. The member 8 is connected to the space S
Push in. Then, after the push-out jack 35 is loosened and the arc-shaped member 2 is returned to the scheduled assembly position indicated by the solid line in FIG. 21 (at this time, the arc-shaped member 8 is at the position indicated by the imaginary line), The arc-shaped member 8 is
Pull back to the position shown by the solid line. As described above, the tunnel lining body 1 is assembled.

Next, a reaction force is applied to the assembled tunnel lining body 1 by the propulsion jack 32, and the TBM 25 is pressed.
, Excavation, and further repeating the above-described steps to sequentially assemble new tunnel lining bodies 1 in a required number according to the size of the tunnel in the axial direction of the already assembled tunnel lining bodies 1. , Complete the assembly of the lining body.

In this embodiment, when assembling the arc-shaped members 2 (arc-shaped members 8) with each other, a bolt joint is provided between the tunnel lining bodies 1 and between the arc-shaped members 2 (arc-shaped members 8). Since the positioning is performed via the guide plates 9 and 37 while being supported by the erector 26 during assembly, the construction speed can be increased. The backing of the tunnel lining body 1 is performed at any time behind the TBM 25 via the through hole 10A. Since the backfill material is intended to prevent the skin from falling off the ground, it is sufficient to fill the gap, and it is only necessary to use a poorly-mixed mortar or gravel.

In the above embodiment, the reinforcing member 11 is formed by processing round steel, iron wire or the like into a lattice shape. However, the concrete plate 3 may be formed by mixing steel fibers into concrete. In the above embodiment, the horizontal frame 4 and the vertical frame 5 are made of angle iron, but they may be made of flat steel.

In the above embodiment, each of the horizontal frames 4 is connected by the reinforcing member 7. However, when the steel frame can be held by the vertical frame 5 alone, or when the concrete is cast, the steel frame is connected to the arc-shaped member. When it can be firmly fixed to the production table 15, it is not always necessary to provide it. In the above embodiment, the guide plate 9 is made of angle steel, but may be made of flat steel.

In the above embodiment, the guide plates 9 are provided on both the horizontal frame 4 and the vertical frame 5, but on the condition that the positioning of the arc members 2 and 8 is not hindered.
Either one of them may be provided, or both may not be provided. Further, in the above embodiment, the tunnel lining body 1 is divided in the transverse direction by joints, but may be staggered. Furthermore, in the present embodiment, the guide plates 9 and 37
Has a relatively small width and a small thickness, but when the earth pressure or the backing pressure increases, the width is increased, the thickness is increased, and the horizontal frame 4 and the vertical frame 5 are formed. It is preferable to increase the stiffness and strength by forming them continuously along the line.

Next, a concrete lining according to another embodiment of the present invention will be described. Note that members that are basically the same as those in the above-described embodiment are given the same reference numerals, and description thereof is omitted. The tunnel lining body 40 according to the present embodiment includes:
The guide plate 37 in the above embodiment is an embodiment in which it is difficult to hold the tunnel lining body 40 in a cylindrical shape.

That is, the arc-shaped member 2 of the present embodiment does not have the guide plate 37 of the above-described embodiment as shown in FIGS. 9 and 10, and as shown in FIG. A pair of guide plates 41 (see FIG. 12) are fixed to the bottom piece 5 </ b> A at intervals in the width direction of the concrete plate 3 so that a part thereof protrudes from the arc-shaped member 2. As shown in FIG. 10, a hole 41A is formed in a portion of the guide plate 41 projecting from the arc-shaped member 2. As shown in FIG. 10, a pair of cap nuts 4 are provided at the end of the arc-shaped member 2 on the side opposite to the side where the guide plate 41 is fixed.
2 are embedded at intervals in the width direction of the concrete plate 3.

The arc-shaped member 8 has a circular shape except that the dimension in the left-right direction in FIG. 13, that is, the dimension along the arc shape of the arc-shaped member 8 is shorter than that of the arc-shaped member 2. It has basically the same configuration as the arc-shaped member 2.
Accordingly, members having basically the same configuration as the arc-shaped member 2 are denoted by the same reference numerals, and description thereof will be omitted. As shown in FIG. 13, the arc-shaped member 8 has a substantially square shape in plan view, and the reinforcing member 7 also shown in FIG.
As shown in FIG. 14, a pair of guide plates 41 are provided not only on one vertical frame 5 but also on the other vertical frame 5, and a cap nut 42 is provided. Not. A pair of guide plates 9 are provided on one vertical frame 4 of the arc-shaped member 8.

In this embodiment, the arc members adjacent to each other are assembled by inserting the cap nut 42 of the other arc member 2 into the hole 41A of the guide plate 41 of one arc member 2 (arc member 8). Correspondingly, one arc-shaped member 2 (arc-shaped member 8) and another arc-shaped member 2 are arranged by an erector 26, and are inserted into holes 41A of a guide plate 41 of one arc-shaped member 2 (arc-shaped member 8). Insert the bolt 43 shown in FIG.
The bolt 43 is screwed into the cap nut 42 of another arc-shaped member 2. In the present embodiment, since the respective arc-shaped members are firmly connected to each other by the bolts 43, the cylindrical shape of the tunnel lining body 40 is reliably held.

[0050]

As described above, according to the first to fifth aspects of the present invention, since the four sides of the concrete plate are framed by the steel members, the rigidity is sufficiently secured, and the concrete plate with high safety is provided. A method for producing a piece, a tunnel lining, and a concrete sheet piece is provided. In the concrete plate piece of the present invention, a guide plate is partially provided on the steel member in a direction substantially perpendicular to the steel member, and positioning with another concrete plate piece is performed through the guide plate. Since it can be performed, there is an effect that the assembly of the tunnel lining body is easy and the construction speed is high. Further, in the inventions of claims 1 to 5, since the production of the steel frame and the placing of the concrete can be carried out in separate processes, there is no restriction on the production, and the production is fast, the concrete plate piece, the tunnel lining body and the like. , And a method of manufacturing a concrete slab. In the invention of claims 1 to 5, a simple steel frame is manufactured,
Since concrete can be cast and cured at the construction site using the mold as a formwork, there is an effect that a formwork is not required and the cost is low. In addition, in the concrete plate piece according to the second aspect, since the reinforcing member is interposed in the concrete plate piece, it is possible to prevent cracking of the concrete plate piece and to sufficiently counteract external forces during backfilling. According to the third aspect of the present invention, the concrete plate piece can be easily assembled by supporting the concrete plate piece by the erector via the tubular member, and the backfill filling material can be injected through the tubular member. The effect is that workability is good.

[Brief description of the drawings]

FIG. 1 is a perspective view of a tunnel lining according to an embodiment of the present invention.

FIG. 2 is a view of a tunnel lining body according to one embodiment of the present invention as viewed from an axial direction.

FIG. 3 is a plan view of an arc-shaped member constituting a part of the tunnel lining body according to one embodiment of the present invention.

FIG. 4 is a sectional view taken along line 4-4 of FIG. 3;

FIG. 5 is a sectional view taken along line 5-5 of FIG. 3;

FIG. 6 is a plan view of another arc-shaped member constituting a part of the tunnel lining body according to one embodiment of the present invention.

FIG. 7 is a sectional view taken along line 7-7 of FIG. 6;

FIG. 8 is a sectional view taken along line 8-8 of FIG. 6;

FIG. 9 is a perspective view of a tunnel lining according to another embodiment of the present invention.

FIG. 10 is a plan view of an arc-shaped member constituting a part of a tunnel lining body according to another embodiment of the present invention.

FIG. 11 is a sectional view taken along line 11-11 of FIG. 10;

FIG. 12 is a sectional view taken along line 12-12 of FIG. 10;

FIG. 13 is a plan view of another arc-shaped member constituting a part of a tunnel lining body according to another embodiment of the present invention.

FIG. 14 is a sectional view taken along line 14-14 of FIG.

FIG. 15 is a sectional view taken along line 15-15 of FIG. 13;

FIG. 16 is a schematic view of a base for manufacturing an arc-shaped member.

FIG. 17 is a sectional view taken along line 17-17 of FIG. 16;

FIG. 18 is a longitudinal sectional view of the TBM 25.

FIG. 19 is a sectional view taken along line 19-19 of FIG. 18;

FIG. 20 is a view showing an assembling process of a tunnel lining body according to one embodiment of the present invention.

FIG. 21 is a view showing an assembling process of a tunnel lining body according to one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tunnel lining body 2 Arc member 3 Concrete plate 3A Bottom surface 3B Side surface 4 Horizontal frame 4A Bottom piece 4B Side piece 5 Vertical frame 5A Bottom piece 5B Side piece 7 Reinforcement member 8 Arc member 9 Guide plate 9A Mounting piece 9B Guide piece 10 Tube Shaped member 10A Through-hole 11 Reinforcement member 12 Lifting box emptying pipe 13 Cylindrical member reinforcement member 14 Mounting plate 15 Arc-shaped member manufacturing table 16 Lower portion of base 17 H-shaped steel 18 H-shaped steel 19 Angle steel 20 Angle steel 21 Angle steel 20 Angle steel 22 Angle iron 23 Angle iron 24 Angle iron 25 TBM 26 Elector 27 Cutter bit or roller bit 28 Cutter part 29 Drive unit 30 Partition wall 31 Belt conveyor 32 Propulsion jack 33 Arc-shaped member pushing and spreading device 34 Positioning jack 35 Pushing jack 36 Tail plate 37 Guide plate 37A Mounting piece 37B Guide piece 40 Tunnel lining body 41 Guide plate 42 Cap nut 43 Bolt

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-55-16133 (JP, A) JP-A-61-286497 (JP, A) JP-A-8-13992 (JP, A) JP-A 59-133 92980 (JP, A) JP-A-7-227826 (JP, A) JP-A-4-89194 (JP, U) JP-A-51-20195 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) E21D 11/04

Claims (5)

(57) [Claims] 1. A concrete plate piece having a substantially rectangular shape in a plan view and a substantially arc-shaped cross section, and four sides are framed by steel members (4, 5). An appropriate number of guide plates (9, 37, 41) are partially provided at least in one of the above 5) in a direction substantially orthogonal to the steel member (4, 5) with a space therebetween. A concrete plate piece formed by filling concrete into concrete. 2. A reinforcing member (1) is attached to the concrete plate piece.
The concrete plate piece according to claim 1, wherein 1) is interposed. 3. A cylindrical member (1) for supporting an erector or for injecting a backfill material is provided at the center of the concrete plate piece.
The concrete plate piece according to claim 1, wherein the tubular member (10) is formed so that its axial dimension is substantially the same as the thickness dimension of the concrete plate piece. 4. A tunnel lining body in which the concrete plate pieces according to claim 1 are combined. 5. A steel frame having four sides framed by steel members (4, 5) at least partially provided with guide plates (9, 37, 41) at intervals. Is fixed on an arc-shaped surface (14) of an arc-shaped member manufacturing base (15), and concrete is poured into the frame and solidified to produce a concrete plate piece. How to make pieces.