JPH0853997A - Tied arch segment - Google Patents

Abstract

PURPOSE:To simplify, downsize and strengthen a structure of a tie bar joining part in a segment body, and thin the segment body. CONSTITUTION:A segment body 12 having a steel frame reinforced concrete structure is formed of a steel frame 13, reinforcements 14 and concrete 15, and a connecting metallic material 17 where a lenghtwise directional cross section of the segment body 12 is formed in an almost triangle and a width directional cross section of the segment body 12 is formed in a box shape, is integrally installed in a position striking on a tie bar joining part 16 in the steel frame 13 of this segment body 12. The concrete 15 is placed on the outer periphery of this connecting metallic material 17, and a tie bar 10 is made jointable to the connecting metallic material 17 by bolts and nuts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tide arch segment, and more particularly to a tide arch segment for making a tie bar joint portion of a segment body simple, thin and strong.

[0002]

2. Description of the Related Art FIG. 22 is a partial longitudinal sectional view showing a tide arch segment of a conventional reinforced concrete structure.

The segment body 2 of the conventional tied arch segment 1 shown in FIG. 22 is formed in a reinforced concrete structure by reinforcing bars 3 arranged vertically and horizontally and concrete 4.

Tie bar joint 5 of the segment body 2
Is concrete 4, anchor metal 6 and anchor rebar 7
And the reinforcing steel bars 8 are embedded therein. Then, the tie bar 10 is coupled to the flange portion of the end of the anchor metal piece 6 of the tie bar joint portion 5 with the bolt 9.

[0005]

By the way, in the above-mentioned conventional tied arch segment 1, since the anchor rebar 7 of the tie bar joint 5 bears a large tensile force acting on the tie bar 10, it is necessary to take a fixing length according to the rebar diameter. is there. Also, a plurality of anchor rebars 7 are required. For this reason, the tie bar joint portion 5 had to have a large structure that considerably protruded from the segment body 2.

As described above, since the tie bar joint 5 in the segment body 2 has a large structure, there is a problem that the manufacturing cost increases, and the space occupied by the tie bar joint 5 in the tunnel mine is large.
There is a problem that it may become an obstacle when assembling the segment. As can be seen from FIG. 22, the anchor rebar 7
Since a large number of reinforcing bars 8 are required around the circumference, there is also a problem that the manufacturing cost is increased in this respect as well, and there is a problem that the thickness of the segment main body 2 is increased.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to make the structure of the tie bar joint portion of the segment main body simple, small, and strong, and further reduce the thickness of the segment main body. To provide a tide arch segment to obtain.

Another object of the present invention is to provide a tide arch segment that can easily and more strongly fix a connecting metal to a tie bar joint of a steel frame of a segment body.

[0009]

In order to achieve the above object, according to the present invention, a segment body of a steel reinforced concrete structure is formed of a steel frame, a reinforcing bar and a concrete, and the segment body is placed at a position corresponding to a tie bar joint portion in the steel frame. The connecting body with a cross section in the length direction of the main body having a substantially triangular shape and the cross section in the width direction of the segment main body formed into a box shape is integrally attached, and concrete is placed on the outer periphery of the connecting metal article. The tie bar can be connected with bolts and nuts.

In order to achieve the above object, according to the present invention, the segment body has a substantially triangular cross section in the lengthwise direction at a position corresponding to the tie bar joint portion of the steel frame, and the segment body is provided on the bottom plate when viewed in the width direction. , A front plate, at least one web for reinforcement, and a rear plate are vertically attached to a connecting metal piece, and a tie bar can be connected to a side wall or a bottom wall of the connecting metal piece by bolts and nuts. ing.

Further, in order to achieve the above object, according to the present invention, the connection metal piece is fixed to a connection plate formed in a shape along a tie bar joint portion of a steel frame, and connected to the tie bar joint portion of the steel frame through the connection plate. The hardware is attached.

In order to achieve the above object better, in the present invention, I type steel or H type steel is used for the steel frame of the segment body, and the steel frame made of this I type steel or H type steel is
A plurality of segment bodies to be formed are arranged at predetermined intervals in the width direction, and reinforcing bars are wound around the plurality of steel frames to bind them together.

[0013]

In the present invention, the segment body of the steel reinforced concrete structure is formed by the steel frame, the reinforcing bar and the concrete. A connecting metal piece is integrally attached to a position of the steel frame of the segment body, which corresponds to the tie bar joint. The connecting hardware is formed so that the cross section of the segment main body in the length direction is substantially triangular, and the cross section of the segment main body in the width direction is box-shaped. In this way, since the connecting hardware is integrally attached to the steel frame that is a constituent member of the segment body, the structure of the tie bar joint can be simplified,
Moreover, it can be formed firmly, and therefore the manufacturing cost can be significantly reduced. Further, since the cross section in the length direction of the segment body is formed into a substantially triangular shape and the cross section in the width direction of the segment body is formed into a box-like shape, the connection hardware has a large structural strength. By using it, the structure of the tie bar joint can be simplified and downsized. Further, since the segment main body has the steel frame reinforced concrete structure as described above, the segment main body itself can be made thin.

Further, according to the present invention, at least a portion of the segment main body for reinforcing the tie bar joint portion of the steel frame has a substantially triangular cross section in the lengthwise direction of the segment main body and is provided on the bottom plate when viewed from the width direction of the segment main body. A single metal web and a back plate are vertically attached to each other to connect them together. This connecting hardware also has a large structural strength, so that the structure of the tie bar joint can be simplified and downsized, and the segment body can be thinned.

Further, according to the present invention, the connection metal piece is fixed to the connection plate. Then, it is attached to the tie bar joint portion of the steel frame of the segment body via this connection plate. As a result, the connecting hardware can be easily and more strongly attached to the steel frame.

Further, in the present invention, I-type steel or H-type steel is used as the steel frame of the segment body. And
A plurality of steel frames made of the I-type steel or the H-type steel are arranged at predetermined intervals in the width direction of the segment body to be formed,
Reinforcing bars are wound around and bound around the plurality of steel frames. As a result, the segment body can be made stronger and thinner, and the steel frame can further strongly support the connection metal piece that is the main constituent member of the tie bar joint.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 5 show a first embodiment of the present invention. FIG. 1 is a partial front view, FIG. 2 is a view taken along the line A--A of FIG. 1, and FIG. Front view in vertical section, FIG. 4 is BB of FIG.
FIG. 5 is a perspective view showing an arrangement of a steel frame and reinforcing bars, which are constituent members of the segment main body, taken along the line.

In the die-d arch segment 11 of the first embodiment shown in these figures, a tie bar joint portion 16 is provided at a predetermined position on the segment body 12. Also,
A bolt mounting window 31 is provided at the end of the segment body 12 on the side of connection with another segment body.

As shown in FIGS. 3 and 4, the segment body 12 includes a steel frame 13 and two types of rebars 14, 1.
4'and concrete 15 form a steel frame reinforced concrete structure. I-type steel or H-type steel is used for the steel frame 13. In this embodiment, as shown in FIGS. 4 and 5, three I-shaped or H-shaped steel frames 13 are arranged at equal intervals in the width direction of the segment body 12, and the three steel frames 13 are arranged. A structure in which a reinforcing bar 14 'is attached to a position corresponding to an outer corner portion of the row of, and the reinforcing bar 14 is wound around the outside of the steel frame 13 and the reinforcing bar 14', bound together, and embedded in concrete 15. I am trying.

The tie bar joint portion 16 has a connection metal fitting 17
And the reinforcing bar 22 and the concrete 15. The connection hardware 17 is made of steel similar to I-type steel and H-type steel, and has a segment body 12 having a substantially triangular cross-section in the longitudinal direction as shown in FIG. 3, and as shown in FIG. A cross section of the main body 12 in the width direction is formed in a box shape. Further, in this embodiment, the connection hardware 17 is attached to the bottom surface of the flange of the steel frame 13 by welding or the like via the attachment plate 18 to be integrated. Further, a plurality of bolt through holes 19 are provided at appropriate intervals on the bottom plate of the connecting hardware 17, and a cap nut 20 is fixed in advance above each bolt through hole 19. The connecting hardware 17 is embedded in the concrete 15 together with the reinforcing bar 22 in a state where the bottom surface is opened.

The tie bar joint 16 constructed as described above
As shown in FIGS. 3 and 4, the upper surface of the flange on the joint end side of the tie bar 10 is applied to the bolt through hole 19 provided in the bottom plate of the connecting hardware 17 from the bolt through hole provided in this flange. Insert the bolt 21 into the
By screwing 1 into the cap nut 20, they can be easily joined.

In the first embodiment, the segment body 12 has a steel-framed reinforced concrete structure composed of three steel frames 13 made of I-type steel or H-type steel, reinforcing bars 14 and 14 ', and concrete 15. Since the steel frame 13 and the reinforcing bar 14 'of the book are bound by the reinforcing bar 14 wound on the outside thereof, the structural strength is large, so that the thickness of the segment main body 12 is greatly reduced and the thickness is reduced. Can be converted.

Moreover, in this embodiment, since the connecting hardware 17 is formed such that the cross section of the segment main body 12 in the lengthwise direction is substantially triangular and the cross section of the segment main body 12 in the width direction is a box shape. Since the connecting hardware 17 is also structurally strong, the tie bar joint 16 can be made small and strong by using this connecting hardware 17, and this connecting hardware 17 is integrated with the steel frame 13 which is a constituent member of the segment main body 12. Since it is attached to the tie bar joint 16
The structure of can be simplified and can be made strong, and in combination, it is possible to significantly reduce the manufacturing cost.

The attachment plate 18 may be omitted, and the connection metal piece 17 may be directly attached to the bottom surface of the flange of the I-shaped steel or the H-shaped steel that is the steel frame 13.

Next, FIGS. 6 to 9 show various shapes and structures of the connecting metal piece in the first embodiment, and are sectional views in the width direction of the segment main body.

The connecting hardware 17 shown in FIG. 6 is reinforced by a reinforcing member 23 attached in the lateral direction inside. Further, the connection hardware 17 shown in FIG. 7 is reinforced by a reinforcing member 24 attached in the vertical direction inside. Also,
The connection hardware 17 shown in FIG. 8 is reinforced by a Y-shaped reinforcing member 25 attached inside. Further, the connection hardware 17 shown in FIG. 9 is reinforced by an inverted Y-shaped reinforcing member 26 attached inside. Other, connection hardware 1
The reinforcing member 7 may be formed in a T shape, an inverted T shape, or the like.
By reinforcing the connecting metal piece 17 with these reinforcing materials, the connecting metal piece 17 itself can be further downsized, and in turn, the tie bar joint portion 16 can be further reduced in size.

Next, FIGS. 10 to 12 show a second embodiment of the present invention. FIG. 10 is a vertical sectional front view of a skeleton portion of a tie bar joint, and FIG. 11 is a view taken along the line CC in FIG. 12
FIG. 4 is a vertical sectional front view showing a connected state of a tie bar.

In the second embodiment shown in these figures, the steel frame 13 of the segment body 12 of the tide arch segment 11 is used.
At a position corresponding to the tie bar joint portion 16 in, the connection metal fitting 36 is welded and integrally attached.

The connection hardware 36 is formed by integrally combining a front plate 36a, a rear plate 36b, a side plate 36c, a bottom plate 36d, and at least one web 37 for reinforcement. The connection hardware 36 is the segment body 12
Has a substantially triangular cross-section in the longitudinal direction thereof, and is viewed from the side, on the bottom plate 36d, the front plate 36a, the web 37,
The rear plate 36b and the rear plate 36b are vertically formed.

The web 37 is sandwiched between the side plates 36c of the connecting hardware 36, and two bolt through holes 38 are provided on each side of the web 37.
Is provided. Also, on the back side of the side plate 36c,
A nut 39 is welded and fixed in position in the bolt through hole 38.

The steel frame 13 and the connecting hardware 36 are embedded in the concrete 15 which is cast except around the bolt through holes 38 provided in the side plate 36c of the connecting hardware 36.

On the other hand, the end plate 40 is provided at the end of the tie bar 10.
Are attached together. In this end plate 40, the bolt through holes 41 are aligned with the respective bolt through holes 38.
Is provided.

If, for example, four steel frames 13 are arranged in an array, the connection metal piece 36 has a front plate 36a, two webs 37, and a rear plate 36b on the upper surface of the bottom plate 36d. You may comprise.

In the second embodiment, in order to join the tie bar 10 to the tie bar joining portion 16, the tie bar 1 is inserted into the bolt through hole 38 provided in the side plate 36c of the connecting metal piece 36.
The bolt through holes 41 provided in the end plate 40 of No. 0 are aligned, the bolts 42 are inserted into the set of bolt through holes 38, 41 from the outside of the end plate 40 of the tie bar 10, and the bolts 42 of the connecting hardware 36 are connected. The nut 39 fixed to the back side of the side plate 36c is screwed and joined.

Also in this second embodiment, the connecting metal piece 36
Is formed by vertically planting a front plate 36a, at least one web 37, and a rear plate 36b on the bottom plate 36d, and has a large structural strength, and therefore the structure of the tie bar joint portion 16 is It is possible to achieve simplification, miniaturization, and strength, and it is possible to make the segment main body 12 thin.

Further, according to the second embodiment, the tie bar 10 can be easily bolted to the tie bar joint 16 from the side of the tie bar joint 16.

13 to 16 show a third embodiment of the present invention. FIG. 13 is a vertical sectional front view of the skeleton portion of the tie bar joint, and FIG. 14 is a view taken along the line DD of FIG. Figure 15
Is a view taken along the line EE in FIG. 13, and FIG. 16 is a vertical cross-sectional front view showing the connected state of the tie bars.

In the third embodiment shown in these figures, a bolt through hole 43 is provided on the bottom plate 36d side instead of the side plate 36c side of the connecting hardware 36 of the second embodiment. Two pieces are provided on both sides of the web 37 with the web 37 interposed therebetween.

Further, in the connection hardware 36, the nut 4 is aligned with the upper surface of the bottom plate 36d in the respective bolt through holes 43.
4 is welded and fixed.

Then, except for the bottom plate 36d side of the connecting hardware 36, the concrete 1 is surrounded by the steel frame 13 of the segment body 12 of the tide arch segment 11 and the connecting hardware 36.
5 are cast.

On the other hand, at the end of the tie bar 10, a connecting flange 10a is extended. This connection flange 1
0a are aligned with the respective bolt through holes 43 provided in the bottom plate 36d of the connecting hardware 36, and the bolt through holes 4
5 are provided.

In the third embodiment, in order to join the tie bar 10 to the tie bar joining portion 16, the tie bar 1 is inserted into the bolt through hole 43 provided in the bottom plate 36d of the connecting hardware 36.
No. 0 connecting flange 10a provided with bolt through hole 4
5 is aligned, the bolt 46 is inserted into the set of the bolt through holes 43, 45 from the lower side of the connecting flange 10a, and the bolt 46 is screwed into the nut 44 fixed to the upper surface side of the bottom plate 36d to be joined. .

The other structure and operation of the third embodiment are the same as those of the second embodiment.

17 to 19 show a fourth embodiment of the present invention. FIG. 17 is a vertical sectional front view of a skeleton portion of a tie bar joint, and FIG. 18 is a view taken along the line FF of FIG. FIG. 19
FIG. 4 is a vertical sectional front view showing a connected state of a tie bar.

In the fourth embodiment shown in these figures, the side plate of the connecting metal piece 36 is omitted.

Further, the upper flange 10b of the tie bar 10
Is provided with a bolt through hole 45 at the end thereof.

The other structure is the same as that of the third embodiment, and the operation is the same as that of the third embodiment.

20 and 21 show a fifth embodiment of the present invention. FIG. 20 is a vertical sectional front view of a skeleton portion of a tie bar joint, and FIG. 21 is a view taken along the line GG of FIG. Is.

In the fifth embodiment shown in these figures, the connection metal piece 36 is welded and fixed to the connection plate 47.

The connecting plate 47 is formed in a shape along the tie bar joint portion 16 of the steel frame 13 in the segment body 12 of the tide arch segment 11.

A connecting plate 47 is attached to the steel frame 13.
Are contacted with each other, the outer periphery of the connection plate 47 is welded to the front side of the steel frame 13, and the corners of the steel frame 13 and the connection plate 47 are welded from the back side of the steel frame 13. In FIG. 21, a welded portion on the outer periphery of the connection plate 47 is indicated by reference numeral 48, and a welded portion from the back side of the steel frame 13 is indicated by reference numeral 49.

By fixing the connection metal piece 36 to the connection plate 47 and welding the connection plate 47 to the steel frame 13 in this manner, the connection metal piece 36 can be attached to the steel frame 13 easily and more strongly.

[0054]

As described above, according to the first aspect of the present invention.
In the invention described, the connecting hardware is integrally attached to the steel frame that is a constituent member of the segment main body, and the structure of the tie bar joint can be simplified and can be formed firmly, so these are manufactured together. There is an effect that the cost can be significantly reduced, and the connecting hardware is formed so that the cross section in the length direction of the segment main body is substantially triangular and the cross section in the width direction of the segment main body is box-shaped. Due to its high strength, the tie bar joint can be simplified and downsized by using this connection hardware, and therefore, the occupying space of the tie bar joint in the tunnel can be reduced. It has the effect of reducing the trouble that becomes a hindrance at the time, and since the segment main body has a steel frame reinforced concrete structure,
This has the effect of making the segment body itself thinner.

According to the second aspect of the present invention,
At the position where it hits the tie bar joint of the steel frame of the segment body, the cross section in the length direction of the segment body is almost triangular,
Further, when viewed from the width direction of the segment main body, a front plate, at least one web for reinforcement, and a rear plate, which are vertically provided on a bottom plate, are integrally attached to a connecting metal piece. Since the structural strength is high, the structure of the tie bar joint can be simplified and downsized, and the segment main body can be made thinner.

Further, in the invention according to claim 3 of the present invention, since the connection metal piece is fixed to the connection plate and is attached to the tie bar joint portion of the steel frame of the segment main body through this connection plate, it is connected to the steel frame. There is an effect that a metal object can be attached easily and more strongly.

In the invention according to claim 4 of the present invention, I-type steel or H-type steel is used for the steel frame of the segment body, and the steel frame made of this I-type steel or H-type steel is formed in the width direction of the segment body to be formed. Since a plurality of steel frames are arranged at a predetermined interval and the reinforcing bars are wound around the plurality of steel frames and bound, there is an effect that the segment main body can be made stronger and thinner. There is also an effect that the connection metal piece, which is a main constituent member of the tie bar joint portion, can be more strongly supported.

[Brief description of drawings]

FIG. 1 is a partial front view showing the first embodiment of the present invention.

FIG. 2 is a view as viewed in the direction of arrows AA in FIG. 1;

FIG. 3 is an enlarged vertical sectional front view of a main part in the first embodiment.

4 is a sectional view taken along line BB of FIG.

FIG. 5 is a perspective view showing an arrangement of steel frames and reinforcing bars of the segment main body in the first embodiment.

FIG. 6 is a cross-sectional view of a connecting material with a reinforcing material that constitutes a tie bar joint.

FIG. 7 is a cross-sectional view of another connecting metal article including a reinforcing member.

FIG. 8 is a cross-sectional view of another connecting metal article with a reinforcing material.

FIG. 9 is a cross-sectional view of yet another connecting metal article including a reinforcing member.

FIG. 10 shows a second embodiment of the present invention and is a vertical sectional front view of a skeleton portion of a tie bar joint portion.

11 is a view taken along the line CC of FIG.

FIG. 12 is a vertical sectional front view showing a connection state of tie bars in the second embodiment.

FIG. 13 shows a third embodiment of the present invention and is a vertical sectional front view of a skeleton portion of a tie bar joint portion.

FIG. 14 is a view on arrow D-D of FIG. 13;

FIG. 15 is a view on arrow EE in FIG.

FIG. 16 is a vertical sectional front view showing a connection state of tie bars in the third embodiment.

FIG. 17 shows a fourth embodiment of the present invention and is a vertical sectional front view of a skeleton portion of a tie bar joint portion.

FIG. 18 is a view on arrow FF in FIG.

FIG. 19 is a vertical sectional front view showing a connection state of tie bars in the fourth embodiment.

FIG. 20 shows a fifth embodiment of the present invention and is a vertical sectional front view of a skeleton portion of a tie bar joint portion.

FIG. 21 is a view taken along the line GG in FIG.

FIG. 22 is a partial vertical cross-sectional view showing a tide arch segment of a conventional reinforced concrete structure.

[Explanation of symbols]

 11 Dide Arch Segment 12 Segment Main Body 13 Steel Frame 14 Reinforcing Bar 15 Concrete 16 Tie Bar Joint 17 Connection Hardware 18 Mounting Plate 19 Bolt Through Hole 20 Cap Nut 21 Bolt 36 Connection Hardware 36a Connection Hardware Front Plate 36b Connection Hardware Rear Plate 36c Connection Hardware Side plate 36d Bottom plate of connection hardware 37 Reinforcing web 38 Bolt through hole 39 Nut 41 Bolt through hole 42 Bolt 43 Bolt through hole 44 Nut 45 Bolt through hole 46 Bolt 47 Connection plate

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Norio Kondo 1-24-4 Shinkawa, Chuo-ku, Tokyo Daitoken Construction Co., Ltd.

Claims (4)

[Claims] 1. A segment main body of a steel reinforced concrete structure is formed by a steel frame, a reinforcing bar, and concrete, and the segment main body has a substantially triangular cross-section in a position corresponding to a tie bar joint in the steel frame of the segment main body. In addition to integrally mounting a connecting hardware with a box-shaped cross section in the width direction of the main body, placing concrete on the outer periphery of this connecting hardware and connecting a tie bar to the connection hardware with bolts and nuts. Characterized tide arch segment. 2. The segment main body has a substantially triangular cross section at a position corresponding to the tie bar joint of the steel frame,
Also, on the bottom plate when viewed from the width direction of the segment main body, a connection plate having a front plate, at least one web for reinforcement, and a rear plate vertically attached is integrally attached, and a side wall or a bottom wall of the connection plate is attached. The tide arch segment according to claim 1, wherein the tie bar is configured to be connectable with a bolt and a nut. 3. The connection hardware is fixed to a connection plate formed in a shape along a tie bar joint portion of a steel frame, and the connection hardware is attached to the tie bar joint portion of the steel frame via the connection plate. Item 1. The tide arch segment according to item 1 or 2. 4. The I-type steel or H-type steel is used for the steel frame of the segment body, and the steel frame made of the I-type steel or H-type steel is
4. A plurality of segment main bodies to be formed are arranged at predetermined intervals in the width direction, and reinforcing bars are wound around the plurality of steel frames to bind them together. Tide arch segment.