JPH0976222A - Form for molding inner surface of covering segment filled with concrete in steel shell - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively prevent the leakage of cement paste between the main girders of a steel shell and a form by providing the surface of the shell to be deformed by following up the surface opposed to spacers when the spacers are pushed to the girders. SOLUTION: Spacers 28, 30 have surfaces to be deformed by following up the surfaces 16a, 18a to be pressed, i.e., upper bottoms 30a when the spacers 28, 30 are pressed by one main girder 16 and a pair of joint plates 18. The surfaces 16a, 18a are the surface of the girder 16 opposed to the spacer 28 and the surfaces of the places 18 opposed to the spacers 30, i.e., the surfaces 16a, 18a of the girder 16 and the plates 18 for specifying the release surface of a steel shell 12 at the small-diameter side. The surfaces 16a, 18a and the spacers 28, 30 are liquidtightly maintained therebetween by the performance deforming by following up the bottoms 30a of the spacers 28, 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold used for forming a tunnel lining segment which is made by filling a steel shell with concrete.

[0002]

2. Description of the Related Art Conventionally, a steel shell consisting of a pair of arc-shaped main girders facing each other, a pair of joint plates facing each other, and a skin plate, and the skin filled in the steel shell beyond its release surface. A lining segment consisting of concrete defining the inner surface facing the plate is used.
This segment is a composite segment, SSPC (Steel Segme
nt with Pre-filled Concrete: Concrete filled steel segment).

Since each of the segments has an inner surface that extends in an arc shape beyond the release surface of the steel shell, when a plurality of the segments are arranged on the circumferential surface of the tunnel, a groove or a gap is formed between the inner surfaces of the adjacent segments. Joints are created. The joints can be filled with a filler such as mortar or concrete, which results in a lining surface consisting essentially of concrete. Therefore, when the segment is used, the secondary lining with cast-in-place concrete can be omitted.

[0004]

By the way, in the above-mentioned segment, after arranging a steel frame member extending along both main girders and both joint plates defining the release surface of the steel shell, the steel is It is manufactured by pouring concrete into the space defined by the shell and the frame member. However, it is actually impossible to process both steel members, that is, each main girder and a part of the frame member on the main girder so that these curved surfaces are in liquid-tight contact. Therefore, the cement paste leaks from between the steel shell and the frame member. Therefore, a plate is pressed against the main girder and the frame member so as to prevent the cement paste from leaking through these gaps. However, the leakage of cement paste could not be completely stopped, and this could lead to deterioration of the quality of concrete.

Further, since the open surface of the steel shell is curved in an arc shape, the concrete put into the space is located in the middle portion between both joint plates, that is, the center in the circumferential direction of the main girder. Gather in the club. Therefore, when pouring concrete, first incline the steel shell and perform half with respect to the circumferential direction of the main girder and level it with a trowel, and after hardening the concrete, tilt the steel shell to the opposite side and leave the same work. I was doing about half of. The two concrete placing operations and the leveling operation with the trowel significantly reduce the production efficiency of the segment.

An object of the present invention is to prevent leakage of cement paste between a main girder of a steel shell and a formwork in the production of a lining segment in which a steel shell is filled with concrete over its release surface. It is to prevent surely. Another object of the present invention is to increase the manufacturing efficiency of the segment.

[0007]

SUMMARY OF THE INVENTION According to the present invention, a steel shell comprising a pair of arc-shaped main girders facing each other, a pair of joint plates facing each other, and a skin plate, and a release surface of the steel shell. An inner surface forming mold of a lining segment consisting of concrete that defines an inner surface that is filled over and that faces the skin plate, and a plate member that is curved in an arc shape relative to the release surface of the steel shell, And a pair of spacers that are liquid-tightly attached to the plate member and extend in an arc shape opposite to the pair of main girders, and each spacer is, when each spacer is pressed against each main girder, the main girder. Has a surface that deforms following the surface facing each spacer.

The formwork may have a pair of similar spacers fixed to the plate member and extending opposite to the pair of joint plates, and the plate member may be provided with holes. it can.

Further, the formwork is attached to the plate member in a liquid-tight manner and extends in an arc shape opposite to one of the pair of main girders, and a similar pair extends opposite to the pair of joint plates. It may have a spacer of.

[0010]

According to the present invention, after the frame is fixed to the steel shell with both spacers of the frame placed on both main girders of the steel shell and pressed, for example, the steel shell is Standing on a flat plate surface, thereby closing the gap between one joint plate of the steel shell and one end of the plate member of the formwork facing the joint plate, and then closing the gap between the other side of the steel shell. Placing and curing concrete in the space defined by the steel shell and the formwork from the gap between the joint plate and the other end of the formwork, then,
Removing the formwork from the steel shell results in a lining segment consisting of concrete filling the steel shell beyond its open surface and defining an inner surface facing the skin plate.

The water-impermeable spacers pressed against the main girders of the steel shell are deformed following the surfaces of the main girders facing the respective spacers. The gap between the spacer and the spacer is eliminated, and the space between them is kept liquid-tight. Therefore, no leakage occurs between the main girders and the spacers of the concrete cement paste that has been cast. Therefore, it is possible to avoid deterioration of the quality of the concrete due to the leakage of the cement paste.

Further, according to the present invention, since the inner surface of the segment is formed by the plate member spaced from the open surface of the steel shell by the spacer of the mold, it is twice as conventional. There is no need to place concrete over and leveling the concrete with a trowel,
It is possible to significantly reduce the time and labor required for manufacturing the segment as compared with the related art, and thus it is possible to improve the manufacturing efficiency of the segment.

Further, if a pair of spacers fixed to the plate member and extending opposite to both joint plates are provided, and holes are provided in the plate member, the space surrounded by the steel shell and the mold is provided. Concrete can be poured through the holes of the plate member.

Further, a formwork is fixed to the plate member, and a water-impermeable spacer that extends in an arc shape facing one of the pair of main girders, and a water-impermeable pair that extends opposite the pair of joint plates. Of the steel shell to which the formwork is attached is erected sideways so that the one main girder faces downward, and between the other main girder and the plate member of the formwork. Concrete can be poured from the voids.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Referring to FIG. 1, a tunnel lining segment formed by using a post-working form according to the present invention is indicated generally by the reference numeral 10. Segment 10 is
It comprises a steel shell 12 and concrete 14 filled in the steel shell.

As shown in FIG. 2, the steel shell 12 comprises a pair of arc-shaped main girders 16 and 17 facing each other, a pair of joint plates 18 facing each other, and a skin plate 20.
Both joint plates 18 are fixed to both ends of both main girders 16 and 17, respectively, and form a frame in cooperation with both main girders 16 and 17. The skin plate 20 is fixed to both main girders 16 and 17 and both joint plates 18, and covers the release surface on the large diameter side of the frame extending in an arc shape. The skin plate 20 defines the outer surface (outer peripheral surface) of the segment 10.

The concrete 14 is filled beyond the release surface of the steel shell 12, ie the release surface on the smaller diameter side of the frame, projects from the release surface and defines the inner surface 21 of the segment 10 facing the skin plate 20. The illustrated segment 10 is provided with a plurality of spaces 23 that communicate with a plurality of joint bolt holes 22 provided in the main girders 16 and 17 and the joint plates 18, respectively. Each space 23
Are opened in the inner surface 21 of the segment, and bolts (not shown) are passed through the joint bolt holes 22 for connecting the segments 10 to each other during the lining of the tunnel.
It defines the maintenance space required for the work to fasten each other.

As shown in FIGS. 2 to 4, the mold 24 according to the present invention includes an arc-shaped curved plate member 26 facing the release surface of the steel shell 12, that is, the release surface on the small diameter side of the frame.
The steel shell 12 is liquid-tightly attached to the plate member 26 with an adhesive.
An arc-shaped spacer 28 that extends relative to one of the main girders 16
And a pair of straight spacers 30 respectively extending opposite the joint plates 18.

In use, the formwork 24 is attached to the steel shell 12 over its open surface using suitable attachment means (not shown). At this time, the spacers 28, 30
Is one of the main girders 16 and the two joint plates 18 facing each other.
It is pressed against and maintained. As a result, the concrete placing space is defined by the steel shell 12 and the form 24. Further, since there is no spacer between the other main girder 17 and the plate member 26 of the form, a gap is created, and this gap defines the concrete inlet.

The plate member 26 is made of a metal plate such as an iron plate, a plastic plate, a wooden plate or the like, and has a peripheral surface (outer peripheral surface) having the same shape as the release surface of the steel shell 12. The spacer is fixed to this outer peripheral surface. The plate member 26 is spaced from the open surface of the steel shell 12 by spacers 28, 30 when the formwork 24 is attached to the steel shell 12. Therefore, the plate member 26 forms the concrete inner surface 21 protruding from the release surface of the steel shell 12 of the segment 10. Each spacer 28, 30 also has a segment 1
Side surfaces 32 and 34 which are continuous with the inner surface 21 of 0 are formed.

Since each of the elongated spacers 28 and 30 is impermeable to water and is liquid-tightly attached to the plate member 26 as described above, the cement paste, which is a component of the cast concrete, is applied to each spacer. It is prevented from leaking through the space between the plate member 26 and each spacer.

Each of the illustrated spacers 28 and 30 has a trapezoidal cross sectional shape of the same size. That is, the upper bottom surfaces 28a, 30a having a small width dimension and the lower bottom surface 28 having a large width dimension
b, 30b, and vertical surfaces 28c, 30c and inclined surfaces 30d, 30d that are continuous with both bottom surfaces (see FIGS. 3 and 5).
reference). Each spacer is adhered to the plate member 26 at its lower bottom surface 28b, 30b. Further, both ends of the spacer 28 are inclined faces, and are in contact with the inclined faces 30d of the both spacers 30 and are liquid-tightly bonded (see FIG. 3).
The cross-sectional shape of each spacer can be set arbitrarily. For example, it may have a rectangular cross-sectional shape defined by an imaginary line added to FIG. 5, two straight lines perpendicular to the imaginary line, and one straight line parallel thereto. The shape of the side surfaces 32 and 34 of the segment 10 is determined by the cross-sectional shape of each spacer, and is also formed between a pair of adjacent segments 10 when the plurality of segments 10 are arranged along the circumferential surface of the tunnel. The cross-sectional shape of the groove or joint is determined.

When the spacers 28 and 30 are pressed against the one main girder 16 and the pair of joint plates 18, the spacers 28 and 30 are deformed following the pressed surface, that is, upper bottom surfaces 28a and 30a (FIG. 2, FIG. 2). 3 and FIG. 5). The pressed surface refers to the surface of the main girder 16 facing the spacer 28 and the surface of each joint plate 18 facing the spacer 30, that is, the main girder 16 and each of the main girders 16 defining the release surface of the steel shell 12 on the small diameter side. Each side 16 of the joint plate 18
a and 18a.

Due to the ability of the upper and lower surfaces 28a and 30a of the spacers to follow and deform, even if the pressed surfaces 16a and 18a have irregular surface portions or irregularities due to processing errors, the pressed surfaces and the spacers are not affected. It is avoided to form a gap between and, and the space between them is kept liquid-tight. This prevents the cement paste from leaking between the spacers 28 and the main girders 16 and between the spacers 30 and the joint plates 18. Such performance of the spacer is obtained by forming the spacer with a material having flexibility, flexibility or elasticity, for example, a rubber material or a plastic material. However, so that the spacer has its original function of maintaining the interval, a spacer having a hardness that can maintain its shape when receiving a compressive force is selected. Further, the spacers 28 and 30 may be integrated, instead of the illustrated example in which they are separate bodies.

In the illustrated example, the upper bottom surface 28 of each spacer is
The widths a and 30a are larger than the width dimension of the facing surface 16a of the main girder 16 and the facing surface 18a of each joint plate 18, but may be set to be the same as or smaller than the width dimension. Further, in the illustrated example, the vertical surfaces 28c and 30c of each spacer are flush with the outer surface of the main girder 16 and the outer surface of each joint plate 18, but there is a step between the vertical surface and the outer surface. It may be.

A plurality of blocks 36 made of rubber are attached to the illustrated steel shell 12 for providing a plurality of spaces 23 provided in the segment 10 and opening to an inner surface 21 thereof. A part of each block 36 is inside the steel shell 12 and closes each joint bolt hole 22 of each main girder and each joint plate, and the remaining part projects from the steel shell 12. Each block 36 has a hole provided with a thread groove, and a bolt 38 which is passed through each joint bolt 22 and screwed into the hole.
It is fixed to each main girder and each joint plate by. Code 3
Reference numeral 7 indicates a reinforcing rib of the steel shell 12, and reference numeral 39 indicates a rubber block for closing the mortar inlet 41 so as not to be filled with the cast concrete.

Each block 36 is a portion projecting from the steel shell 12, and when the formwork 24 is attached to the steel shell 12,
Inclined surface 4 that closely contacts inclined surfaces 28d and 30d of each spacer 28 and 30 and part of upper bottom surfaces 28a and 30a, respectively.
0 and plane 42 are provided.

Concrete casting can be performed, for example, by using a steel shell 12
Can be carried out by vertically standing one main girder 16 downward and pouring concrete into the pouring space through the gap between the other main girder 17 positioned above and the form 24. After the concrete is poured, the concrete exposed in the voids is leveled with a trowel. After curing, formwork 24 is used for steel shell 12
Removed from the block and hardened concrete 1
By pulling out from 4, the segment 10 is obtained.

According to the mold 24 of the present invention, the cement paste does not leak from the space between the steel shell 12 and the mold 24. Therefore, it is not necessary to take the cement paste leak countermeasure that has been conventionally required. The segment 10 can be formed by temporary casting of concrete into the steel shell 12.

6 and 7 show examples of changing the form. In the form frame 44 shown in FIG. 6, a pair of spacers 46 respectively facing the pair of main girders 16 and 17 (FIG. 2) are liquid-tightly bonded to the plate member 26, and the pair of joint plates 18 are provided. A pair of spacers facing each other is not provided.

In the form 48 shown in FIG. 7, a pair of spacers 50 and a pair of spacers 52 facing the pair of main girders 16 and 17 and the pair of joint plates 18 (FIG. 2) are liquid-tight. Is glued to.

Each spacer 46, 50 and each spacer 5
Reference numeral 2 is the same as the spacer 28 and the spacer 30 shown in FIG. 1, respectively, and a surface 46a that deforms following the upper surface 16a of each main girder 16 and the upper surface 18a of each joint plate 18 when pressed against the surface. , 50a and surface 52a
Having. Further, the coupling mode between the spacers 50 and 52 shown in FIG. 7 is the same as the coupling mode between the spacers 28 and 30 shown in FIG. Since both spacers in FIG. 6 come into contact with the plate described later, it is desirable that one end surface thereof be flush with the edge of the plate member 26.

The segment 1 using the form 44 shown in FIG.
When forming 0, the steel frame 12 is formed so that both spacers 46 are pressed against the pair of main girders 16 of the steel shell 12.
Attach to The steel shell 12 to which the formwork 44 is attached is
The one joint plate 18 is erected vertically downward, and at this time, the gap between the one joint plate 18 and the plate member 26 of the form is closed with an appropriate plate. Since the edge of the one joint plate 18 and the edge of the plate member that define the gap both extend linearly, by applying the plate to these edges and the end faces of both spacers 46, it is relatively easy. Can prevent cement paste leakage. The concrete is composed of the other joint plate 18 of the steel shell and the plate member 26 of the formwork 44.
It can be charged through the gap defined by and. Similarly, the concrete exposed in this gap is leveled with a trowel.

Further, when the segment 10 is formed by using the mold 48 shown in FIG. 7, each pair of spacers 50 and 52 of the mold 48 has the main girder 16 and the joint plate 18 of each pair of the steel shell 12, respectively. It is attached to the steel shell 12 so that it can be pressed against. In the steel shell 12 to which the form 48 is attached, the skin plate 20 is placed on the floor surface, and concrete is poured through the pair of holes 54 provided in the plate member 26. Since the open surface of the steel shell 12 is covered with the plate member 26, the concrete does not gather in the central portion in the circumferential direction of the steel shell 12 and rise from the open surface. Further, since both holes 54 are provided close to both joint plates 18 whose height position is higher than the central portion of the steel shell 12, the concrete poured into the steel shell 12 gathers and the holes 54 are formed. Can be prevented from flowing out.

In each of the illustrated examples, all the spacers are made of the same material, but instead of this example, a three-layer structure may be used. That is, the intermediate layer may be made of a rigid body such as metal or wood for maintaining the shape, and both surface layers sandwiching the intermediate layer may be made of a rubber material or a plastic material. The intermediate layer contributes to maintaining the shape of the spacer, and the rubber material and the plastic material have flexibility, flexibility, elasticity, etc., and these properties are such that the surface layer follows the pressed surface. Allows you to transform.

[Brief description of drawings]

FIG. 1 is a perspective view of a segment formed using a mold of the present invention.

FIG. 2 is a perspective view of a steel shell and a disassembled mold of the present invention.

FIG. 3 is a side view of a steel shell and a mold attached to the steel shell.

FIG. 4 is a plan view of a mold.

FIG. 5 is a partial cross-sectional view of a steel shell and a mold attached to the steel shell.

FIG. 6 is an exploded perspective view of a mold of another example.

FIG. 7 is an exploded perspective view of a mold of still another example.

[Explanation of symbols]

 10 segment 12 steel shell 14 concrete 16,17 main girder 18 joint plate 20 skin plate 21 inner surface of segment 26 plate member 28, 30, 46, 50, 52 spacer

Claims (3)

[Claims] 1. A steel shell consisting of a pair of arc-shaped main girders facing each other, a pair of joint plates facing each other, and a skin plate, and the steel plate filled into the steel shell beyond its release surface. An inner surface forming form of a lining segment consisting of concrete defining opposing inner surfaces, the plate member curved in an arc shape relative to the open surface of the steel shell, and liquid-tightly attached to the plate member. And a pair of water-impermeable spacers that extend in an arc shape relative to the pair of main girders, each spacer, when each spacer is pressed against each main girder, on the surface facing each spacer of the main girder. A mold for forming the inner surface of the lining segment, which has a surface that deforms following it. 2. A pair of spacers, which are liquid-tightly attached to the plate member and extend opposite to the pair of joint plates, when the spacers are pressed against the joint plates, the spacers are attached to the joint plates. The mold according to claim 1, further comprising a pair of spacers each having a surface that deforms following the opposing surfaces, and the plate member is provided with a hole. 3. A steel shell composed of a pair of arc-shaped main girders facing each other, a pair of joint plates facing each other, and a skin plate, and the steel plate filled into the steel shell beyond its release surface. An inner surface forming form of a lining segment consisting of concrete defining opposing inner surfaces, the plate member curved in an arc shape relative to the open surface of the steel shell, and liquid-tightly attached to the plate member. It includes a water-impermeable spacer that extends in an arc shape relative to one of the pair of main girders and a water-impermeable pair of spacers that extends opposite the pair of joint plates, and the spacer and the pair of spacers are , Respectively, when these spacers are pressed against the main girder and the pair of joint plates, respectively, a surface of the main girder facing the spacer and the pair of the pair of spacers of the pair of joint plates. A mold for forming the inner surface of the lining segment, which has a surface that deforms following the surface facing the support.