JP2000034897A - Composite-construction liner and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a composite-construction liner, which has excellent workability on manufacture and in which strength is increased and manufacturing cost can be reduced. SOLUTION: A steel shell is composed of the side plates of two vertical surfaces to a tunnel axis and the side places of two surfaces along the tunnel axis and the face plates of either one surface or both surfaces on the ground side or the hollow side, and the inside of the steel shell is filled with concrete in the composite linear used for tunnel lining. The side plates 3 of the two surfaces along the tunnel axis consist of a thin steel plate at that time, and the thin steel plates are bent and formed as a projecting section 12 or a recessed section 13 in the tunnel radial direction so as to be mutually engaged between the opposed side plates in the tunnel peripheral direction. The side plates 3 of the two surfaces along the tunnel axis are fixed on the side plates 2 of the two vertical surfaces to the tunnel axis and at both ends in the tunnel peripheral direction of either face plate 4, (5) on the ground side or the hollow side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liner having a composite structure in which concrete is packed in a steel shell used for lining various tunnels using a mountain tunnel method, a TBM method or a shield method, and a method for manufacturing the liner. About.

[0002]

2. Description of the Related Art A lining segment or liner in a mountain tunnel method, a TBM method, or a shield method is referred to as a liner. When this liner is constructed by filling concrete inside the steel shell inner space made of a steel material, it is called a composite structure liner. (1) As a first prior art of a synthetic structure liner, a steel shell is:
The two side plates perpendicular to the tunnel axis, and the face plate disposed on any one of the ground side and the inner space side of the tunnel are formed by integral press molding of the same plate with the curvature of the tunnel and a steel plate, On the two side plates perpendicular to the tunnel axis, to connect the liners to each other in the tunnel axis direction,
A jig for bolt fastening or a chuck pin jig is mounted, and two side plates along the tunnel axis (hereinafter referred to as inter-piece joint plates) are two side plates perpendicular to the integrally formed tunnel axis. Are fixed to both ends of the face plate on the ground side or the inner space side in the tunnel circumferential direction, and a jig for bolt fastening is mounted on the inter-piece joint plate.

[0003] Reinforcing bars are provided at predetermined intervals in the circumferential direction of the tunnel and in the axial direction of the tunnel at a position where a predetermined concrete cover can be secured on one open surface of the five steel shells (for example, on the inner side of the tunnel). A gibber steel material for preventing slippage is welded at a predetermined interval to the inside of the face plate and two side plates perpendicular to the tunnel axis. Concrete is filled with steel so that a bolt box can be formed in the steel shell.
A liner with a concrete composite structure is constructed.

The above-mentioned composite structure liner has the following problems. Since the piece-to-piece joint plate is bolted, it takes time and effort to manufacture a bolt box at the time of placing concrete, and quality control of concrete filling is also difficult. Further, the segment assembling work at the construction site is labor intensive and requires a long working time. Special dowel steel material is welded for integration of concrete and steel shell, which increases manufacturing costs.

(2) As a second prior art, there is a tenoned reinforced concrete segment which realizes labor saving and shortening the construction period by boltless. This segment is formed on the side surface perpendicular to the tunnel axis (joint surface between rings) or on the side surface along the tunnel axis (joint surface between pieces) with an uneven shape that meshes with the displacement of the opposing surface in the tunnel radial direction. Is what it is. In the above-described technique, the ends of the joint between the pieces and the joint between the rings are easily chipped, and in particular, the tenon is easily chipped.
There is a disadvantage that a cushioning material is required. When the above-mentioned technology is used for a shield tunnel having a deep underground depth, since the concrete itself has imperfect water stopping properties, water leaks from the concrete body under high groundwater pressure.

(3) As a third conventional technique, Japanese Patent Publication No.
As disclosed in Japanese Patent No. 942486, a boltless joint structure is known in which a joint corner is reinforced by using an L-shaped joint hardware for a piece-to-piece joint of a reinforced concrete segment. Although this boltless joint structure reinforces the disadvantage of the mortise concrete segment of (2), the concrete surface remains at the joint part and is incomplete.

(4) As a fourth conventional technique, Japanese Patent Publication No.
As disclosed in Japanese Patent No. 252994, the joint plate or main girder plate of the concrete-filled steel segment is formed into an irregular shape that meshes in the tunnel radial direction by hot rolling, and the shear strength in the tunnel radial direction fastened by bolts is reduced. There is a high joint structure. This joint structure requires a hot rolling or forging process to form the uneven shape on the steel plate, and has a disadvantage that the manufacturing cost is relatively high. Due to the limitation of the manufacturing process and the limitation of the thickness of the steel sheet, the engagement of the unevenness is shallow, so that the combination with the bolt tightening is indispensable. Welding of the joint between the ground side face plate and the joint plate or main girder plate requires not only strength but also water stoppage, and it is difficult to ensure dimensional accuracy due to welding strain, and quality control is accordingly difficult. .

(5) As a fifth conventional technique, Japanese Patent Publication No.
As disclosed in Japanese Patent No. 59300, a composite segment in which a steel plate with double-sided projections whose opposite ends are bent is provided on the inner side and the ground side of the tunnel facing each other, and a dowel is provided inside and concrete is cast. It has been known. In the above-mentioned structure, a steel plate with a projection is used to secure the integrity of the steel plate and the concrete, and a dowel is provided. However, there is a problem that the processing cost is increased. Further, when joining the steel plate with a projection and the side plate along the tunnel axis by welding, when placing the steel plate with the projection on the side plate, it is necessary to cut off the projection of the joint,
Further, when a steel plate with a projection is sandwiched between side plates, high cutting accuracy of the steel plate with a projection is required. In any case, the cost increases.

[0009]

As described above, the conventional synthetic structural liner has inefficiencies in the construction process, resulting in increased production costs, lack of structural reliability and strength, and difficulty in quality control. However, there are still problems to be improved in these respects.

The present invention reduces the cost of steel shell structure, realizes an economical composite structural liner by reducing the cost of placing concrete, improves the structural reliability and strength of the joint, watertightness of the main body, and waterproofness of the joint. Composite construction that enables improved construction, rapid construction with boltless operation, labor-saving construction, improved dimensional accuracy by integrally forming a steel shell, and increased resistance to the axial force and bending moment in the tunnel circumferential direction by a sandwich structure of concrete. An object of the present invention is to provide a liner and a method for manufacturing the liner.

[0011]

In order to solve the above-mentioned problems, the present invention is configured as follows. In the first invention, a steel shell is constituted by two side plates perpendicular to the tunnel axis, two side plates along the tunnel axis, and either one of the ground side or the inner air side or both side plates. In the composite structure liner used for tunnel lining in which concrete is packed in the steel shell, two side plates along the tunnel axis are made of a thin steel plate, and face the thin steel plate in the tunnel circumferential direction. The convex or concave portions that mesh with each other between the side plates and prevent deviation in the tunnel radial direction are formed by bending,
The two side plates along the tunnel axis are fixed to the two side plates perpendicular to the tunnel axis and both ends in the tunnel circumferential direction of either the ground side or the inner side.

[0012] A second aspect of the present invention relates to a method of manufacturing a semiconductor device, comprising:
The convex shape of the side plate of the surface is formed from the two side plates perpendicular to the tunnel axis leaving a flat portion of a required dimension, and both ends in the circumferential direction of the tunnel axis of the two side plates perpendicular to the tunnel axis are straight. It is characterized by the following.

According to a third aspect of the present invention, only the inner side of the two side plates along the tunnel axis, or only the ground side, or
It is characterized in that both end portions on the ground side and the inner space side are bent so as to overlap with and contact with a face plate or a concrete surface on the ground side or the inner space side.

According to a fourth aspect of the present invention, two side plates along the tunnel axis and either the ground side or the inner side face plate are integrally formed of a single steel plate, and the end surface of the side plate is connected to the tunnel axis. It is characterized in that two vertical side plates or two vertical side plates perpendicular to the tunnel axis and one of the inner side and the ground side are fixed.

According to a fifth aspect of the present invention, a steel shell is formed by two side plates perpendicular to the tunnel axis, two side plates along the tunnel axis, and one or both face plates on the ground side or the interior side. In the method for manufacturing a composite structure liner used for tunnel lining which is constructed and filled with concrete in steel shells, two side plates along the tunnel axis and one of the ground side or the inner space side are provided. The face plate and the surface plate are cold-pressed integrally using one thin steel plate, and the two side plates along the tunnel axis, at the time of the cold press forming, between the side plates facing each other in the tunnel circumferential direction. So that they can bite each other
A convex portion or a concave portion for preventing displacement in the tunnel radial direction is formed by bending.

In a sixth aspect of the present invention, a steel shell is formed by two side plates perpendicular to the tunnel axis, two side plates along the tunnel axis, and one or both surface plates on the ground side or the inner space side. In the composite structure liner used for tunnel lining which is constructed and filled with concrete in the steel shell, a convex portion projecting in the steel shell inward at a required size and at a required pitch is formed on the face plate by pressing. It is characterized by the configuration provided.

According to a seventh aspect of the present invention, there is provided a semiconductor device comprising:
The side plate of the surface and the one or both of the ground side and the inner space side are integrally formed by a single steel plate in a shape having the convex portion on the face plate, and the end face is provided with the tunnel. It is characterized in that two side plates perpendicular to the axis or two side plates perpendicular to the tunnel axis and one surface plate on the inner side or the ground side are fixed.

According to an eighth aspect of the present invention, two side plates along the tunnel axis and one surface plate on either the ground side or the inner space side are formed of a steel plate cut into a required shape, and a steel shell is formed on the face plate. Shape the convex part protruding inward and integrally mold,
A steel shell is formed by fixing two side plates perpendicular to the tunnel axis or two side plates perpendicular to the tunnel axis and either one of the inner side and the ground side to its end face. It is characterized in that the shell is filled with concrete to produce a composite structure liner.

According to a ninth aspect of the present invention, two side plates perpendicular to the tunnel axis and one surface plate on either the ground side or the inner space side are formed of a steel plate cut into a required shape, and a steel shell is formed on the face plate. Shape the convex part protruding inward and integrally mold,
A steel shell is formed by adhering two side plates along the tunnel axis or two side plates along the tunnel axis and either the inner side or the ground side to its end face. It is characterized in that the shell is filled with concrete to produce a composite structure liner.

According to a tenth aspect of the present invention, there are provided two side plates along the tunnel axis, two side plates perpendicular to the tunnel axis, and one of the ground side and the inner space side, each of which is formed of a steel sheet cut into a required shape. The surface plate is formed with a convex portion projecting inwardly of the steel shell on the surface plate, so that two surfaces along the tunnel axis and two side plates perpendicular to the tunnel axis are joined by four sides. It is characterized in that it is integrally formed into a box shape, its four sides are fixed to form a steel shell, and concrete is filled inside the steel shell to produce a composite structural liner.

According to an eleventh aspect of the present invention, a protrusion protruding inwardly of a steel shell is provided by using a mold having a press surface having a required curvature and irregularities on either the ground side or the inner side. Forming a portion.

According to a twelfth aspect of the present invention, a steel shell is constituted by two side plates perpendicular to the tunnel axis, two side plates along the tunnel axis, and one or both face plates on the ground side or the inner space side. In the composite liner used for tunnel lining in which concrete is packed in the steel shell, two side plates along the tunnel axis and the ground side or the inner side are made of thin steel plate. In the side plate, a convex portion or a concave portion for preventing a deviation in a tunnel radial direction is formed by bending so as to mesh with each other between side plates facing each other in a tunnel circumferential direction. A convex portion protruding inwardly of the steel shell at a pitch is formed, and two side plates along the tunnel axis are two side plates perpendicular to the tunnel axis and one of the ground plate side and the inner side. Characterized in that it is secured to tunnel circumferential end.

According to the first invention, the prior art (1)
-Eliminates the disadvantages of (5) above, reducing the cost of steel shell construction, realizing an economical composite structural liner by reducing the cost of placing concrete, improving the structural reliability and strength of joints,
Improvements in water tightness of the main body and waterproofness of the joints, rapid construction by boltless operation, realization of labor-saving construction, improvement of dimensional accuracy by integral molding, etc. are achieved.

According to the second aspect, in addition to the operation of the first aspect, it is possible to omit the cutting of the uneven shape at the end of the side plate perpendicular to the tunnel axis.

According to the third invention, in addition to the function and effect of the first invention, the shear strength of the joint in the circumferential direction of the tunnel is improved.
In particular, when water stoppage is not required, joining is easy.

According to the fourth and fifth aspects of the invention, the waterproofness is improved, the dimensional accuracy is high, and the manufacturing cost is low.

According to the sixth aspect of the present invention, the processing cost can be reduced by omitting the conventional steel material such as a dowel steel, and the steel plate equivalent to the steel dovetail can be assured with the integrity of the concrete. Such high cutting accuracy is not required.

According to the seventh to eleventh aspects, in addition to the function of the sixth aspect, the manufacturing cost is further reduced, the water stoppage is improved, and the dimensional accuracy is high.

According to the twelfth aspect, the first to eleventh parts are
The overall functions and effects of the invention are achieved.

[0030]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show claims 1 to 5 of the present invention.
FIG. 1 is a diagram for explaining the basic characteristics of the invention corresponding to FIG.
Is a cutaway perspective view showing an open sandwich composite structure liner as a first embodiment, FIG. 2 is a cutaway perspective view showing a double flange sandwich composite structure liner, and FIG.
It is a figure showing three examples of a joint structure section between each liner.

In FIG. 1 to FIG. 3, each composite structure liner 1 has two side plates 2 perpendicular to the tunnel axis, two side plates (referred to as inter-piece joint plates) 3 along the tunnel axis, and a tunnel ground side. The steel plate 6 is formed by fixing the face plate 4 or the ground side face plate 4 and the inner space side face plate 5 to each other. In FIG. 1, reinforcing bars 7 are arranged at predetermined intervals in the tunnel circumferential direction and the tunnel axial direction at a position on the hollow side of the steel shell 6 inside the tunnel where a predetermined concrete cover can be secured. 8 are cast. A connecting shaft 10 for connecting the liner rings and a fitting portion 11 are provided on the two side plates 2 perpendicular to the tunnel shaft.

In the composite liner 1 of FIG. 2, the face plate 5 is fixed to the inside of the tunnel without arranging the reinforcing bar 7 of FIG.
Filled concrete 8 is cast in steel shell 6 to form a double flange sandwich composite structure.

Each joint plate 3 in each of the composite structure liners 1 shown in FIGS. 1 and 2 is formed of a thin steel plate, and a convex portion 12 and a concave portion 13 for preventing displacement in the radial direction of the tunnel are formed by bending. The convex portion 12 and the concave portion 13 of each joint plate 3 of the liner adjacent to the liner are shaped to mesh with each other in the tunnel radial direction.

Specific examples of the cross-sectional shapes of the convex portion 12 and the concave portion 13 are shown in FIGS. 3A, 3B, and 3C. In FIG. , A concave portion is formed in the central portion and meshes with each other. FIG. 2B is an example in which the cross section is formed as a convex and concave portion having a substantially V-shape and meshes with each other, and FIG. An example in which arc-shaped projections and depressions are engaged with each other is shown.

In the composite structure liner 1 described above, the joint plate 3 between the pieces can be easily manufactured by cold press bending of a thin steel plate. Because of this, the shape of the concave-convex portion can be formed deeply, so that the engagement of the liner with respect to the displacement in the radial direction of the tunnel is reliable, and an auxiliary means such as a bolt is unnecessary.

Since the contact surface between the pieces of each liner is the joint plate 3 made of a steel plate, the filling concrete 8 and the joint plate 3 are formed into a composite structure, and the local strength is increased. Is improved, and at the same time, stress concentration due to local contact can be alleviated. Even when waterproofness is required, steel shell 6
Are two side plates 2 perpendicular to the tunnel axis and two joint plates 3
And the face plate 4 or 5 surrounds the five surfaces with a steel plate, and the joints at the respective joints are welded or integrally formed, so that complete waterproofness can be secured.

Furthermore, the presence of the uneven portions 12 and 13 increases the longitudinal bending stiffness of the inter-piece joint plate 3 connecting the circumferential direction of the tunnel, so that the joint plate 3 is deformed by the driving pressure at the time of placing concrete. Can be kept small,
High dimensional accuracy of the product. A bolt box is not required for placing the concrete filling 8 and the steel shell 6
Can be used as a formwork, in the case of a five-sided steel shell, it is only necessary to fill the steel shell with concrete and finish the released one side with an iron or the like, and the concrete casting cost is low. When the six surfaces are steel shells, it is only necessary to fill concrete with high fluidity into the steel shells, and the casting cost is even lower.

When the synthetic liner 1 is required to have a high water-stopping property, as shown in FIG. 4, a water-stop groove 15 for fitting a water-swellable packing 14 on both sides of the convex portion 12 and the concave portion 13 is considered. What is necessary is just to press-bend and form the steel plate of the joint plate 3 into the formed shape. In addition, when the ground is relatively hard, the bending moment is small as the circumferential sectional force of the liner and the axial compressive force is excellent, so even if you do not attach the slip stopper inside the face plate,
Sufficient load-bearing performance as a sandwich composite structure can be exhibited. When the ground is loose and the bending moment is relatively large, the integrity of the steel shell and concrete can be secured by attaching a stud dowel or a dowel steel to the inside of the face plate.

FIGS. 5A, 5B and 6 show an embodiment corresponding to the second aspect of the present invention. One joint plate 3 of the opposite steel shell 6 is formed with a convex portion 12 having a cross section of a chevron, a V-shape, and an arc, respectively, and the other joint plate 3 has a cross section of a chevron corresponding thereto. And V-shaped and arc-shaped concave portions 13
Are formed, and the convex portions 12 and the concave portions 13 forming a pair fit each other.

At the time of assembling the tunnel lining with the steel shell 6 of the composite structure liner 1, first, the composite structure liner 1
The current synthetic structure liner 1 is pressed in the circumferential direction of the tunnel between the two side plates 2 perpendicular to the tunnel axis, which is the joint surface between the rings, at a predetermined distance X on the inter-piece joint plate 3 of Then, using the engagement between the convex portion 12 and the concave portion 13 of the joint plate 3 between the pieces as a guide, the composite structure liner 1 is used until the joint plates in the ring, that is, the two side plates 2 perpendicular to the tunnel axis, come into contact with each other. Move in the tunnel axis direction to assemble the tunnel lining.

Therefore, as shown in FIGS. 5 and 6, if the shape of the convex portion 12 of the joint plate 3 between the pieces is formed at a distance X or more from the position of the two side plates 2 perpendicular to the tunnel axis, the tunnel axis The side plate 2 having two surfaces perpendicular to the direction does not require processing of the end face in the circumferential direction of the tunnel as shown in FIGS. 1 and 2 and need only be cut straight to reduce the processing cost. If a thin steel plate having good cold formability is used for the inter-piece joint plate 3 having the protruding portions 12, the illustrated inter-piece joint plate 3 is formed by press deep drawing.
Can be economically formed. The piece-to-piece joint plate 3 having the concave portion 13 may be formed by press bending in the radial direction in the same manner as in the embodiment of FIGS. 1 to 3, and is sandwiched between two side plates 2 perpendicular to the tunnel axis. It can be economically formed simply by welding.

FIG. 7 shows a steel shell 6 of a composite liner 1 according to another embodiment. In this embodiment, the end 16 in the tunnel radial direction of the joint plate 3 is press-bent formed.
As a first advantage of press-bending the end portion 16 in this manner, the joint plate 3 joins the ground plate-side face plate 4 or the inner space-side face plate 5 by overlapping steel plates. The required dimensional accuracy for the face plates 4 and 5 can be relaxed, and fillet welding can be facilitated. In particular, when water stoppage is not required, the joining between the joint plate 3 and the face plates 4 and 5 can be performed by spot welding, pressure bonding, adhesive bonding, or the like, and the joining is further facilitated.

As a second advantage, the inter-piece joint plate 3
The joint plate 3 further strengthens the restraining effect of the joint plate 3 on the surrounding concrete 8 and improves the shear strength of the fill concrete 8, and at the same time, the bent portion of the steel plate end itself has the shear strength. Has a greater resistance to shear forces in the tunnel radial direction. These effects are particularly remarkable when there is no face plate 4 or 5 and the concrete surface is open.

FIG. 8 shows an assembled view of the composite structure liner 1 as another embodiment. As shown in the figure, a piece-to-piece joint plate 3 having a convex portion 12 and a concave portion 13 and a predetermined curvature are formed by press bending using a single steel sheet having more excellent cold formability. The face plate 4 on the ground side of the tunnel is integrally manufactured. After that, the two side plates 2 perpendicular to the tunnel axis and the inner side of the tunnel having the joint plate 3 and the face plate 4, and the joining protrusions 17 and the joining recesses 18 of the uneven portions 12 and 13 at both ends, are provided. The face plate 5 is fixed, and thereafter, the filling concrete is filled to form the composite structure liner 1.

According to the method of manufacturing the composite structure liner 1, the processing cost can be reduced, and the steel shell 6 with high dimensional accuracy and the composite structure liner 1 can be manufactured. In particular, in the above-described manufacturing method, since the inter-piece joint plate 3 and the face plate 2 are integrally formed, the strength and reliability of the connecting portion on each surface are high, and the water stopping property is perfect.

9 to 11 are views for explaining the basic characteristics of the invention corresponding to claims 6 to 11 of the present invention. FIG. 9 is a cutaway perspective view showing a double-flange sandwich composite structure liner as an embodiment thereof. FIG.

In FIG. 9, the synthetic structure liner 1
Is fixed to two side plates 2 perpendicular to the tunnel axis, two side plates along the tunnel axis (that is, a piece-to-piece joint plate) 3, a face plate 4 on the tunnel ground side, and a face plate 5 on the inner space side. Each of the face plates 4 and 5 is provided with a number of projections 19 projecting inward in the direction of the steel shell at a required size and a required pitch by pressing. Filled concrete 8 is cast.

In the composite liner 1 of FIG. 9, a thin steel plate is press-formed to simultaneously form a curved surface having a curvature adapted to the shape of a tunnel and a convex portion (a depression as viewed from the outside of the liner) 19 on the face plates 4 and 5. It can be manufactured at a much lower cost than the conventional use of a steel plate with projections.

The height of the projecting portions 19 to be press-formed on the face plates 4 and 5 is 2 mm or more. By designing for this, a sufficient slip-preventing action is exhibited, and the integrity of the face plates 4, 5 and the concrete 8 can be ensured.

Since the convex portion 19 hardly resists the axial force, the width of the convex portion 19 in the tunnel axial direction is considered as a defect in the axial resistance cross section of the face plates 4 and 5. The face plates 4 and 5 may be designed to be reinforced against axial force and bending in the circumferential direction of the tunnel.

According to the composite structure liner 1, the sandwich composite structure in which the face plates 4 and 5 are made of a flange steel material can resist the axial force in the circumferential direction of the tunnel and the bending moment. By arranging the protrusions 19 in a staggered manner, it is also possible to reduce cross-sectional defects of the face plates 4 and 5.

As shown in FIG. 10, when manufacturing the steel shell 6, one flat steel plate 20 is cut into the shape shown in the figure, and the inter-piece joint plate 3 is pressed to the face plate 4 through the bent connection portion 21 by pressing. By integrally molding and simultaneously forming the projection 19, the manufacturing cost can be reduced. Further, in this manufacturing method, since the number of welds is small and the welding strain is small, the steel shell 6 with high dimensional accuracy and the composite structure liner 1 using the same can be manufactured. Moreover, this synthetic structure liner 1
Since the piece-to-piece joint plate 3 and the ground side face plate 4 are integrally formed, the strength and reliability of the connecting portion on each surface are high, and the waterproofness is perfect.

As shown in FIG. 12 (A), the first stage of the production of the composite structure liner 1 is to form a piece from a flat steel sheet 20 cut to a required shape and size via a bent connection portion 21. The inter-joint plate 3 and the face plate 4 are formed by press molding. As a second step, a male mold 24 having a required curvature and a depression 22 shown in FIG.
And a female mold 2 having a convex mold 25 fitted into the recess 22.
By press-forming the face plate portion using No. 6, it can be easily manufactured at low cost.

When the inter-piece joint plate 3 and the male mold 24 come into contact with each other at the time of demolding, the steel shell after press forming is moved to the male mold 24.
However, since the steel shell is formed of a thin steel plate, it can be easily bent and deformed in the elastic region of the steel material to be released. In addition, in order to further facilitate demolding, a male mold 2
4 may have a required dimension shorter than the arc length of the face plate 4.
Contact with the male mold 24 can be avoided.

As shown in FIG. 13, when the steel shell 6 is manufactured, two side plates 2 perpendicular to the tunnel axis are formed through bent connection portions 28 in parallel with both longitudinal side edges of one flat steel plate 27. And the face plate 4 on the ground side (this may be the face plate 5 on the inner side) may be integrally formed by pressing, and the convex portion 19 may be formed at the same time, and thereafter, the flat inter-piece joint plate 3 may be fixed thereto. In this case, the steel shell 6 can be formed (and possibly another face plate), so that the manufacturing cost can be reduced.

In the first stage of the production of the composite structure liner 1, two side plates 2 perpendicular to the tunnel axis and the face plate 4 are formed from a single flat steel plate 27 by press molding to form a connecting portion 28. As a second step, the same kind of curvature and depression as shown in FIG. 12 and a male and female mold having a convex shape to be fitted therein can be manufactured without any trouble.

As shown in FIG. 15, when the steel shell 6 is manufactured, two flat side plates 2 perpendicular to the tunnel axis and two side plates along the tunnel axis ( That is, the piece-to-piece joint plate 3) and the face plates 4 and 5 on the ground side or the inner space side (in the figure, the face plates on the ground side are shown).
By integrally molding, the manufacturing cost can be further reduced. Furthermore, according to this manufacturing method, there are few welds,
Since the welding strain is small, a steel shell with high dimensional accuracy and a composite liner using the same can be manufactured. In this composite structure liner 1, the inter-piece joint plate 3 and the two side plates 2 and the face plate 4 perpendicular to the tunnel axis are integrally formed, so that the strength and reliability of the connection portion on each surface are higher and the water stopping property is further improved. Is even more complete.

In the first stage of the production of the composite structure liner 1, a single steel plate 2 is cut as shown in a development view of each part of the steel shell as shown in FIG. The second stage is to press the bent connection 21 between the piece joint plate 3 and the face plate 4 and the bent connection 28 between the two side plates 2 perpendicular to the tunnel axis and the face plate 4 from the cut flat steel plate 29. It is formed by molding. In the third stage, two side plates perpendicular to the face plate portion and the tunnel axis are formed by using substantially the same molds as those described above including male and female molds each having a required curvature and depression and a convex shape fitted into the recess. The part 2 is press-formed, and the 2
The side plate 2 of the surface and the joint plate 3 are integrally formed in a box shape so as to meet each other on four sides. In the fourth step, the four sides are fixed by welding. If necessary, another face plate on the inner side or the ground side having another curvature may be fixed. Then, the concrete 8 is cast.

FIG. 17 is a diagram for explaining the basic characteristics of the invention described in claim 11 obtained by combining the inventions of claims 1 to 5 and the inventions of claims 6 to 11. In the embodiment of FIG. 17, a convex portion 12 and a concave portion 13 formed by bending in the tunnel radial direction are formed in the inter-piece joint plate 3, and the face plates 4, 5 on the side of the tunnel ground and the inside of the hollow side are formed in the steel shell inward direction. The steel shell 6 provided with a large number of convex portions 19 projecting from
Filled concrete 8 is cast into the steel shell 6 to form the composite liner 1.

When the steel shell 6 shown in FIG. 17 is manufactured, as shown in FIGS. 18 and 19, both ends of the flat steel plate 20 are convexly protruded through bent connecting portions 28 parallel to both longitudinal side edges. Convex portion 17 for joining with the concave portion 12 and concave portion 13 and concave portion 18 for joining
The side plate 2 on two sides perpendicular to the tunnel axis and the face plate 4 on the ground side (this may be the face plate 15 on the inner space side) are integrally formed by pressing, and the projection 19 is formed at the same time. The steel shell 6 can be formed only by fixing the inter-piece joint plate 3 having the convex portions 12 and the concave portions 13 (and possibly another face plate), so that the manufacturing cost can be reduced.

As shown in FIG. 20 and FIG.
In the manufacture of the steel shell 6 of FIG. 7, one steel plate 31 is used to form two side plates 2 perpendicular to the tunnel axis having a joint projection 17 and a joint recess 18 at both ends, and a convex portion 12 and a concave portion 13. And two face plates along the tunnel axis (that is, the inter-piece joint plate 3) and one face plate 4,
5 (the face plate on the ground side is shown in the figure)
By bending and integrally forming the respective portions via the first and second 28 and fixing the joined portions to form a box shape, the manufacturing cost can be further reduced. Further, according to this manufacturing method, a steel shell having high dimensional accuracy due to a small number of welds and a small welding strain, and a composite liner using the same can be manufactured. In this composite structure liner 1, the piece-to-piece joint plate 3 and the two side plates 2 and the face plate 4 perpendicular to the tunnel axis are integrally formed, so that the strength and reliability of the connection part on each surface are higher and the waterproofness is higher. More complete.

[0062]

According to the composite liner of the present invention and the method of manufacturing the same, the following effects can be obtained. Compared to conventional composite structure liners, cost reduction of steel shell structure and reduction of concrete casting cost realize economical composite structure liner,
Improved structural reliability and strength of joints, improved watertightness of the main body and improved waterproofness of joints, rapid construction by boltless, realization of labor-saving construction, improved dimensional accuracy by integral molding, and sandwich structure of steel and concrete This has the effect of increasing the resistance to the axial force in the circumferential direction of the tunnel and the bending moment.

[Brief description of the drawings]

FIG. 1 is a cutaway perspective view of a composite liner according to an embodiment of the present invention.

FIG. 2 is a cutaway perspective view of a composite liner according to another embodiment of the present invention.

FIGS. 3A, 3B, and 3C are cross-sectional views showing a meshing relationship of three examples of a concave portion and a convex portion formed on the inter-piece joint plate.

FIG. 4 is a sectional view showing a water stopping structure of the inter-piece joint plate.

FIGS. 5A and 5B are perspective views showing two other examples of a concave portion and a convex portion formed on the inter-piece joint plate.

FIG. 6 is a perspective view showing still another example of a concave portion and a convex portion different from FIG.

FIGS. 7A, 7B, and 7C are cross-sectional views showing three examples of a joint structure between a piece joint plate and a face plate.

FIG. 8 is an exploded perspective view of a member forming a steel shell shown as another embodiment.

FIG. 9 is a cutaway perspective view of a composite structure liner according to another embodiment.

FIG. 10 is a development view of a steel plate forming a steel shell as another embodiment.

FIG. 11 is a perspective view in which the steel sheet of FIG. 10 is press-formed.

12 (A) and (B) are cross-sectional views showing a press forming step of the steel sheet of FIG. 11.

FIG. 13 is a development view of a steel plate forming a steel shell as another embodiment.

FIG. 14 is a perspective view in which the steel sheet of FIG. 13 is press-formed.

FIG. 15 is a development view of a steel plate forming a steel shell as another embodiment.

FIG. 16 is a perspective view in which the steel sheet of FIG. 15 is press-formed.

FIG. 17 is a cutaway perspective view of a composite liner according to another embodiment of the present invention.

FIG. 18 is a development view of a steel plate forming a steel shell as another embodiment.

FIG. 19 is a perspective view of the steel sheet of FIG. 18 formed by press forming.

FIG. 20 is a development view of a steel plate forming a steel shell as another embodiment.

FIG. 21 is a perspective view in which the steel sheet of FIG. 20 is press-formed.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 composite structure liner 2 two side plates perpendicular to tunnel axis 3 two side plates (piece-to-piece joint plate) 4 along tunnel axis 4 face plate on ground side 5 face plate on inner side 6 steel shell 7 steel bar 8 filling concrete DESCRIPTION OF SYMBOLS 10 Connecting shaft 11 Fitting part 12 Convex part 13 Concave part 14 Water-swellable packing 15 Waterproof groove 16 Tunnel radial end part 17 Joining convex part 18 Joining concave part 19 Convex part 20 Steel plate 21 Piece-to-piece joint plate Folded connection with face plate 22 Depression 23 Press surface 24 Male mold 25 Convex portion 26 Female mold 27 Steel plate 28 Steel plate 28 Folded connection between side plate and face plate perpendicular to tunnel axis 29 Steel plate 30 Steel plate 31 Steel plate

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Michio Sasaki, Inventor 20-1 Shintomi, Futtsu-shi, Chiba Nippon Steel Corporation Technology Development Division (72) Inventor Masato Miyake 20-1 Shintomi, Futtsu-shi, Chiba New Japan Inside the Technology Development Division of the Iron and Steel Company (72) Kenichiro Imafuku 20-1 Shintomi, Futtsu-shi, Chiba F-term in the Technology Development Division of Nippon Steel Corporation (Reference) 2D055 BA01 BA05 EB01 EB10 EB10 KB07

Claims (12)

[Claims] 1. A steel shell is constituted by two side plates perpendicular to the tunnel axis, two side plates along the tunnel axis, and either one of the ground side or the inner side, or both side faces,
In the composite liner used for tunnel lining in which concrete is packed in a steel shell, two side plates along the tunnel axis are made of a thin steel plate, and the side plate facing the thin steel plate in a tunnel circumferential direction. A convex portion or a concave portion that meshes with each other to prevent displacement in the radial direction of the tunnel is formed by bending, and the two side plates along the tunnel axis are two side plates perpendicular to the tunnel axis and the ground side or inside. A composite liner, which is fixed to either end of the face plate on the empty side in the circumferential direction of the tunnel. 2. The two side plates perpendicular to the tunnel axis, the convex shape of the two side plates along the tunnel axis being formed by leaving a flat portion of a required size from the two side plates perpendicular to the tunnel axis. 2. The liner according to claim 1, wherein both side ends of the side plate in the tunnel circumferential direction are straight. 3. The inner side of the two side plates along the tunnel axis, or only the ground side, or both ends of the ground side and the inner side, 3. The composite structure liner according to claim 1, wherein the liner is formed so as to be overlapped with a concrete surface. 4. A side plate perpendicular to the tunnel axis, wherein two side plates along the tunnel axis and a face plate on either the ground side or the inner space side are integrally formed of a single steel plate. The composite structure liner according to any one of claims 1 to 3, wherein the side plate or two side plates perpendicular to the tunnel axis and one of the inner side and the ground side are fixed. 5. A steel shell is constituted by two side plates perpendicular to the tunnel axis, two side plates along the tunnel axis, and one or both face plates on the ground side or the inner space side. A method of manufacturing a composite liner used for tunnel lining in which concrete is packed in a steel shell, comprising: two side plates along a tunnel axis; and one surface plate on a ground side or an inner side. Is cold-pressed integrally using one sheet of steel sheet, on the two side plates along the tunnel axis, at the time of the cold press forming, so as to mesh with each other between the side plates facing in the circumferential direction of the tunnel, A method for manufacturing a liner having a composite structure, wherein a convex portion or a concave portion for preventing displacement in a radial direction of a tunnel is formed by bending. 6. A steel shell is constituted by two side plates perpendicular to the tunnel axis, two side plates along the tunnel axis, and one or both face plates on the ground side or the inner space side. In a synthetic liner used for tunnel lining in which concrete is packed in a steel shell, a configuration is provided in which a convex portion is provided on the face plate so as to protrude inward in a steel shell at a required size and a required pitch by pressing. Characterized synthetic structural liner. 7. Two side plates along the tunnel axis, two side plates perpendicular to the tunnel axis, or both of the two types of side plates, and either one of the ground side or the inner space side. A face or both face plates is integrally formed by a single steel plate in a shape having the convex portion on the face plate, and two side plates perpendicular to the tunnel axis or on an end face thereof,
7. The composite liner according to claim 6, wherein two side plates perpendicular to the tunnel axis and one surface plate on the inner space side or the ground side are fixed. 8. A steel plate cut into a required shape, two side plates along the tunnel axis and one surface plate on the ground side or the inner space side projecting from the steel plate inward in the steel shell. The two side plates perpendicular to the tunnel axis, or the two side plates perpendicular to the tunnel axis, and either one of the inner side and the ground side are formed on the end surface. A method of manufacturing a liner having a composite structure, comprising: forming a steel shell by fixing the steel shell; and filling the steel shell with concrete. 9. A steel plate cut into a required shape, two side plates perpendicular to the tunnel axis and one surface plate on either the ground side or the inner space side projecting inward from the steel shell to the face plate. The two end plates along the tunnel axis, or the two side plates along the tunnel axis, and either the inner side or the ground side are provided on the end surface. A method of manufacturing a liner having a composite structure, comprising: forming a steel shell by fixing the steel shell; and filling the steel shell with concrete. 10. A steel plate cut into a required shape, two side plates along the tunnel axis, two side plates perpendicular to the tunnel axis, and one of the ground side and the inner space side.
The surface plate is formed with a convex portion projecting inwardly of the steel shell on the surface plate, so that two surfaces along the tunnel axis and two side plates perpendicular to the tunnel axis are joined by four sides. A method of manufacturing a composite structure liner, comprising integrally forming a box shape, fixing four sides thereof to form a steel shell, and filling concrete in the inside of the steel shell. 11. A protrusion protruding inwardly of a steel shell is formed on a surface plate on either the ground side or the inner space side by using a mold having a press surface with a required curvature and irregularities. The method for producing a composite structure liner according to any one of claims 8, 9 and 10, wherein: 12. A steel shell composed of two side plates perpendicular to the tunnel axis, two side plates along the tunnel axis, and one or both face plates on the ground side or the inner space side. In a composite structural liner used for tunnel lining in which shells are filled with concrete, two side plates along the tunnel axis and the ground side or inner side surface plate are made of a thin steel plate, A convex or concave portion for preventing displacement in the radial direction of the tunnel is formed by bending so that the side plates facing each other in the circumferential direction of the tunnel mesh with each other, and a steel shell of a required size and a required pitch is formed on the face plate by pressing. A convex portion protruding inward is formed, and the two side plates along the tunnel axis are two side plates perpendicular to the tunnel axis.
A composite liner, which is fixed to both sides of a surface side plate and either a ground side or an inner space side in a tunnel circumferential direction.