JP3158141B2 - Steel segment joint structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to the construction of pipes such as water supply and sewerage systems, subways, telegraph cable housing tunnels, underpasses, water intake tunnels, water discharge tunnels and common ditches by shield method, etc. The present invention relates to a steel segment used in the construction field such as when constructing a cylindrical structure such as a deep foundation pile, an underground space, a water storage tank, and the like, and particularly to a joint structure that is tensile-joined via a fixing tool such as a bolt.

[0002]

2. Description of the Related Art Conventionally, as a joint structure in which main steel beams of opposite steel segments are tensile-joined via bolts,
What is described in Japanese Patent Publication No. 4-72039 is known. This is because, at the inside of the joint plate of the steel segment, both ends of a steel arch-shaped plate which is curved in an arc shape such that an intermediate portion is separated from the joint plate are fixed by welding, and a tie-deck is formed. A space is provided between the arch-shaped plate and the joint plate, and a bolt hole having a center line coincident with the bolt hole of the joint plate is provided at the center of the arch-shaped plate. -The opposite steel segments are joined by bolts passing through the bolt holes of the tie-shaped plate and the bolt holes of the joint plate.

[0003] The tie door of this arch-shaped plate,
The tightening force of the bolt or the tensile force of the bolt due to the external force can be directly transmitted to the main girder, and the tightening force or the tensile force of the bolt is distributed to the legs on both sides of the arched plate. As a result, a large joint strength and joint stiffness between the opposing steel segments can be ensured.

However, the above-mentioned arc-shaped plate can increase the local rigidity of the joint plate, but cannot increase the rigidity of the entire joint plate. Even if bolts are arranged over a wide area in the longitudinal direction of the joint plate, bolts that are far from the main girder bend the joint plate and hardly contribute to the tensile force as tension bolts. The load is eccentric between the main girder and the bolt, and the arc-shaped plate and the joint plate are subjected to large bending and shearing forces by this eccentricity, and there is a limit in strength, rigidity and structure. . The load from the bolt can reduce the bearing pressure concentration on the joint plate by the above-mentioned arched plate, but the total load on the joint plate does not change, and a large tensile force is applied to the weld between the main girder and the joint plate. It works and it becomes full penetration welding, and cost increase is inevitable.

[0005]

Therefore, when joining opposing steel segments, there is a need for a joint structure and joining method for steel segments which has high rigidity and strength, is easy to construct, and is inexpensive. ing.

[0006]

[Means for Solving the Problems] Advantageously solving the above problems
The joint structure of the steel segment according to the present invention
Joins a main girder and a joint plate to the end of the main girder,
Connect a vertical rib parallel to the plate and near the center of the main girder in the longitudinal direction.
The first and second steel segments together to form a steel segment.
Insert a fastener across each joint plate of the segment,
Tighten both steel segments with this fastener
The main girder and the front
Disposing a shear reinforcing member in a direction perpendicular to the joint plate,
A shear reinforcing member is connected to the main girder, the joint plate, and the longitudinal rib.
When joining, the joint plate is joined and joined at the middle part in the thickness direction.
A joint beam is constructed, and the steel fixture is
That the vertical ribs of the segment are fixed.
Sign.

[0007] The joint structure of the steel segment according to the present invention is also provided.
In the structure, the shear reinforcing member is fixed in the segment thickness direction.
It is characterized in that a plurality are arranged so as to be above and below.

[0008] Further, the shear reinforcing member in the present invention,
A plurality of predetermined concrete injection holes are provided in the shear reinforcing member.
The joint plate, the longitudinal rib, and the main
Digits and In the space inside the joint beam formed by
The composite beam is constructed by filling the cleat,
The first and second steel segments are connected via the structural beam
It is characterized by being fastened and fixed by the fixing tool.
You.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings. FIGS. 1 to 11 show a steel segment 1 according to a first embodiment of the present invention, in which two intermediate main girders 2a are arranged at substantially equal intervals between a pair of main girders 2 and A joint plate 4 is arranged in parallel with the main girder 2, and the joint plate 4 is in contact with both ends of each main girder 2, 2 a at right angles to the main girder 2, 2 a and is fixed by welding. Also skin plate 1
6 is the main girder 2, the joint plate 4, the intermediate main girder 2a, and the vertical rib 9
And is fixed by welding.

[0010] A plurality of reinforcing ribs (hereinafter referred to as vertical steel ribs) 9 are spaced apart from and parallel to the joint plates 4 disposed opposite to each other to be joined with each other. 2
a, and are arranged at right angles so as to intersect at right angles, and are divided and arranged at the respective main girders 2, 2a.
Is fixed by welding.

In the steel segment 1, the joint plate 4, a vertical rib 9 disposed parallel to the joint plate 4 and closer to the longitudinal center of the main beams 2, 2a, and the vertical rib 9
The joint beam 10 is formed by the main girders 2 and 2a to which the joint beam 4 and the joint plate 4 are joined, and a shear reinforcing member 20 described later.

[0012] In FIGS. 1 to 4, and the main beam 2 and the intermediate main beam 2a the long sides 21 of equal length to the spacing of and has a coupling plate 4 and the short sides 22 of shorter length than the distance between the vertical ribs 9 The shear reinforcing member 20 has its long side 21 on the upper side surface of the vertical rib 9,
The short side 22 is fixed to the main girders 2, 2a extending from the longitudinal rib 9 in the direction of the joint plate 4 by welding 24 such as fillet welding. That is, one side of the shear reinforcing member 20 is fixed to the longitudinal rib 9 by welding 24, and the shear reinforcing member 2
A space 26 having a predetermined interval is provided between the joint 0 and the joint plate 4. One shear reinforcing member 20 is provided between the pair of main girders 2.
And the lower surface thereof may be fixed to the longitudinal rib 9 and each of the intermediate main girders 2a by welding or the like, or the main girder 2 and the intermediate main girder 2a may be fixed.
A plurality of shear reinforcing members 20 divided according to the length between them
May be fixed to each vertical rib 9 and each intermediate main girder 2a.
The skin plate 16 is fixed to the main girders 2 and 2a and the lower end surface of the joint plate 4 and also serves as a lower shear reinforcement member. On the inside, the shear reinforcing member 20 may be fixed for each intermediate main girder 2a. In this embodiment, a flat steel plate is used as the shear reinforcing member 20, but the present invention is not limited to this.

The joint plate 4 and the vertical rib 9 of the steel segment 1 are provided with bolt holes 6 and 6a so that their axes are aligned with each other. Then, the bolt holes 6, 6a of the first steel segment 1 and the bolt holes 6, 6a of the second steel segment 1 which coincide with the axes provided in the joint plate 4 and the vertical rib 9 are also provided. A bolt (hereinafter referred to as a fixing tool) 3 is inserted between the steel segments 1 and the nuts 8 through the joining beams 10.
It can be fixed by tightening. Note that FIG.
As shown in FIG. 1, the fastener 3 is preliminarily housed in the steel segment 1 and a plurality of steel segments 1 are combined. Then, as shown in FIG. , 6a and fastened with nuts 8.

[0014] Figures 5 and 6 show a second embodiment of the present invention, the shear reinforcement member 20, the joining beam 1
Main side 2 forming one side of 0, long side 2 having a length equal to 2a
1 and a short side 22 having a length equal to the length of the main girders 2 and 2a forming one side of the joint beam 10. The shear reinforcing member 20 is connected to an upper end side surface of the longitudinal rib 9 in the joint beam 10. The upper ends of the main girders 2 and 2a and the upper end side of the joint plate 4 are fixed. That is, the entire joint beam 10 is covered with the shear reinforcing member 20 and is fixed to the joint beam 10 by welding 24. In this case as well, one shear reinforcing member 20 is passed between the pair of main girders 2, and the lower surface thereof is welded or the like to the main girders 2, the vertical ribs 9, the joint plates 4, and the upper ends of the intermediate main girders 2a. It may be fixed to the side surface (however, not shown). The plurality of shear reinforcing members 20 divided according to the length between the main girder 2 and the intermediate main girder 2a are divided into each longitudinal rib 9, each joint plate 4, and each intermediate main girder 2a.
When it is fixed in each space surrounded by a, a stronger shear resistance can be obtained. Other configurations are the same as those of the first embodiment.

[0015] FIGS. 7 and 8 show a third embodiment of the present invention, the in this embodiment shearing reinforcement member 2
0 has a long side 21 having a length equal to the main girder 2 forming one side of the joint beam 10 and a short side 22 having a predetermined length shorter than the length between the main girder 2 and the intermediate main girder 2a. And the long side 21
Is fixed to the upper end side surface of the main girder 2 in the joining beam 10, and the two short sides 22 are respectively attached to the upper end side surface of the joint plate 4 above the joint plate 4 and the vertical rib 9 and the upper end side surface of the vertical rib 9. Fix it. Such a shear reinforcing member 20 is fixed to each main girder 2 and each intermediate main girder 2a. That is, in each of the three spaces formed between the main girder 2 and the intermediate main girder 2a, two shear reinforcing members 20 are arranged, and a slit-shaped gap 25 having a predetermined width is provided at the center. From this space 25, a concrete described later can be injected. Other configurations are the same as in the first embodiment. In the third embodiment, one joining beam 1
One shear reinforcing member 20 may be provided on one side of the zero (not shown).

FIG . 9 shows a fourth embodiment of the present invention. In this embodiment, the shear reinforcing member 20 has a predetermined length shorter than the length between the vertical rib 9 and the joint plate 4. A side 21 and a short side 22 having a predetermined length shorter than the length between the main girder 2 and the intermediate main girder 2 a are fixed to the upper side surface of the main girder 2 in the joint beam 10. The short side 22 is fixed to the upper end side surface of the vertical rib 9 above the vertical rib 9. Such a shear reinforcing member 20 is provided for each main girder 2 and each intermediate main girder 2a by using the vertical rib 9 and the main girder 2,
2a. A space 26 having a predetermined interval is provided between the shear reinforcing member 20 and the joint plate 4, and a slit-shaped gap 25 having a predetermined width is provided at the center of the shear reinforcing member 20. Other configurations are the same as in the first embodiment.
In the fourth embodiment, one shear reinforcing member 20 can be provided on one side of one joint beam 10.

FIG. 10 and FIG. 11 shows a fifth embodiment of the present invention. In the first to fourth embodiments, the shear reinforcing member 20 includes the main beams 2, 2a, the vertical ribs 9, and the joint plate 4 in the joint beam 10.
In the present embodiment, the shear reinforcing member 20 is fixed to the middle part in the thickness direction of each of the above members. That is,
One or a plurality of shear reinforcing members 20 are fixed to the main girder 2, the joint plate 4, and the intermediate main girder 2a in the thickness direction for each range divided by the intermediate main girder 2a. Further, the bolt holes 6 and 6a are provided above and below the shear reinforcing member 20, or in the case of a plurality of them, between them. Alternatively, the position of the shear reinforcing member 20 is shifted and fixed so as not to overlap with the bolt holes 6 and 6a. In addition, in 5th Embodiment, the shear reinforcement member 20 may be provided in the lower end surface or lower end side surface of a segment in the form which reinforces the skin plate 16 as needed. Further, the shear reinforcing member 20 is provided with a main girder 2,
The intermediate main girder 2 a, the joint plate 4, and the vertical rib 9 may be fixed by some combinations. Other configurations are the same as in the first embodiment.

[0018] Figures 12 and 13 show a sixth embodiment of the present invention. In this embodiment, as shown in each drawing, a concrete, which will be described later, is smoothly injected into the shear reinforcing member 20, so that a plurality of predetermined concretes are provided within a range in which structural strength is not hindered. The concrete injection hole 23 is provided, and through the concrete injection hole 23, the inside space of the joint beam 10 formed by the joint plate 4, the vertical rib 9, and the main beams 2, 2a is provided. Concrete 2
8 to form a composite structural joint beam 11, through which the first and second steel segments 1 are fastened and fixed by the fixing tool 3 and the nut 8. 3 shows a joint structure of a segment 1. In this case, concrete is filled after the fixing tool 3 inserted into the bolt holes 6 and 6a is covered with a circular pipe or the like.

Further, seventh 14 and 15 present invention
As an embodiment, a modified example of the sixth embodiment will be described. In this embodiment, the concrete injection hole 2 in the sixth embodiment is used.
3, the concrete 28 is surrounded by a main girder 2, an intermediate main girder 2a, a joint plate 4, and a vertical rib 9 in a state in which a circular pipe 29 for inserting a fastener is buried therein. An example is shown in which the space is filled and hardened, and thereafter, the shear reinforcing member 20 is disposed and fixed to the main girder 2, the intermediate main girder 2a, the joint plate 4, and the vertical rib 9 by welding 24. Have been. In the seventh embodiment, the fastener 3 is attached to the first steel segment 1, the bolt hole 6 of the second steel segment 1 opposed thereto, and the circular pipe 29 of the concrete 28. The steel segments 1 are inserted and locked, and the steel segments 1 are fastened and fixed by the fasteners 3 via the concrete composite structure connecting beams to form a joint structure of the steel segments 1.

[0020] 16 and 17, an eighth embodiment of the present invention, showing a modification of the seventh embodiment shown in FIG. 14, FIG. 15. In this embodiment, the shear reinforcing member 20 is
The sixth embodiment is different from the sixth embodiment in that it is provided at a predetermined length shorter than the length between the first and the second joint plates 4. Then, the shear reinforcing member 20 is fixed to the joint plate 4, the main girder 2, and the intermediate main girder 2a by welding, and the joint plate 4, the main girder 2, the intermediate main girder 2a, and the vertical rib 9
Concrete 28 is filled in the inner space surrounded by the above, thereby forming the composite structural joint beam 11, and the fixture 3 is inserted through the interior of the concrete 28.

[0021] FIGS. 18 and 19, a ninth embodiment of the present invention, the space surrounded by the main beam 2 and the joint plate 4 and the longitudinal ribs 9, a length shorter than between the joint plates 4 and the longitudinal ribs 9 The concrete 28 is further filled to form the composite structural joint beam 11, and the concrete 28 is buried in a circular pipe 29.
The nut 7 is fixed to the threaded portion at the end that has penetrated the concrete 28, so that the first
The joint structure of the steel segment 1 for fixing the steel segment 1 and the second steel segment 1 is shown.

[0022] FIGS. 20 and 21, 10 of the present invention
As an embodiment, a modification of the eighth embodiment is shown. That is, in the tenth embodiment, in addition to the structure of the ninth embodiment, a long side 21 having a length equal to that between the main girder 2 and the intermediate main girder 2 a is provided. A shear reinforcement member 20 having a short side 22 of the same length as that of the first embodiment is provided, and the shear reinforcement member 20 is fixed to the joint plate 4, the main girder 2, and the middle main girder 2 a by welding 24 on the upper end side surfaces. Other configurations are the same as in the ninth embodiment. 22 and FIG.
As shown in FIG. 3, in the ninth and tenth embodiments of the present invention, concrete
A dovetail 30 is buried in the girder 28, thereby strengthening the integration of the concrete 28 with the main girder 2 and the intermediate main girder 2a.

[0023] FIGS. 24 and 25 are eleventh embodiment is shown. In the embodiment of the present invention, the steel segment 2 for fixing the first and second steel segments 1 by inserting the threaded rod 7 into the bolt hole 6 of the joint plate 4 and fastening the nut 8 to the screw portion thereof. And the main girder 2
And has an intermediate main beam 2a the long sides 21 between the equal length, joint
A shear reinforcing member 20 having a shorter side 22 having a length shorter than the distance between the hand plate 4 and the vertical rib 9 is provided, and the shear reinforcing member 20 is connected to the joint plate 4, the main girder 2 and the upper end side of the intermediate main girder 2 a. Is fixed by being welded with a weld 24.

FIG . 26 shows a twelfth embodiment of the present invention. In this embodiment, in addition to the configuration of the eleventh embodiment of FIGS. 24 and 25, as shown in FIG. 26, a shear reinforcing member is provided on the outer surface (which may be the inner surface) of the skin plate 16 of the steel segment 1. The difference from the eleventh embodiment of the present invention lies in that 20 is provided in parallel with the shear reinforcement member 20 on the upper side, and the other configuration is the same as the eleventh embodiment.

FIG . 27 shows a thirteenth embodiment of the present invention. This embodiment is characterized in that the arrangement position of the shear reinforcing member 20 is changed from that of the other embodiments.
That is, in the thirteenth embodiment, the shear reinforcing member 20 is provided at an intermediate portion in the thickness direction of the main girder 2, the intermediate main girder 2a, and the joint plate 4. Other configurations may be the same as those of the eleventh embodiment of the invention shown in FIGS. 24 and 25 and the fifth embodiment shown in FIGS. 10 and 11. Further, in the thirteenth embodiment, the planar shape of the shear reinforcing member 20 may be another planar shape as described in the other embodiments.

[0026] Next, the operation of the present invention will be described from the temporary assembling process of the steel segment 1. When a steel segment ring is temporarily assembled using the steel segment 1 shown in FIGS. 1 to 4 to form, for example, an inner wall of a tunnel having a rectangular cross section, as shown in FIGS. Do. FIG.
An example in which the steel segment 1 of the present invention is configured as an inner wall of a tunnel having a rectangular cross section is shown, and FIGS. 29 and 30 are views of the lower part of the inner wall of the tunnel 15. The direction of arrow G in each figure is the direction of the tunnel axis. In FIG. 29, the side where the steel segments 1 are joined by the fasteners 3 is the existing side, and the side where the fasteners 3 are incorporated is the new side.

As shown in the drawings, the joint plate 4 of the new steel segment 1 is brought into contact with the joint plate 4 of the existing steel segment 1, and the temporary fixing members provided on these joint plates 4 are provided. The new steel segment 1 is temporarily fixed to the existing steel segment 1 with the bolts and nuts for temporary fixing by the bolt holes 13. By sequentially performing such processes, a ring-shaped segment body such as a rectangle is constructed as shown in FIG. In the case of a rectangular ring, a steel segment having an L-shaped side face is provided at each of the four corners. (However, not shown).

[0028] Then the bolt holes 13 at equal intervals in the longitudinal direction of the main girder 2 which is in contact with the new side of the steel segment 1 of the existing rectangular annular side are disposed, rectangular ring of new Both steel segments are temporarily fixed in the longitudinal direction of the main girder on the existing side of the body by means of bolts 17 and nuts 18 inserted through bolt holes 13 arranged at the same interval as the existing side.

The above-mentioned temporary fixing after the end is pulled out fastener 3 incorporated in each steel segment 1, a bolt hole 6 provided in the joint plate 4 of the steel segment 1, the joint plate Longitudinal ribs 9 arranged parallel to 4 and closer to the center
And a bolt hole 6a having an axis coinciding with the bolt hole 6 provided on the joint plate 4 and the same rib provided on the joint plate 4 and the vertical rib 9 on the segment 1 opposite to each other. Insert into the bolt holes 6, 6a having an axis,
On both sides of the longitudinal rib 9 of the both steel segments 1 near the center, the both steel segments 1 are fastened and fixed by the screw 7 and the nut 8. A plurality of bolt holes are opened at intervals in the longitudinal direction of the main girder, the steel segments 1 are continuously connected in the tunnel axial direction, bolts are inserted into the bolt holes, and nuts are fastened. The steel segments 1 are connected in the axial direction of the tunnel.

In the joint structure of the steel segment 1 as described above, the main girders 2 and 2a of the steel segment 1, the joint plate 4 disposed at the ends thereof at right angles to the main girder, and the joint plate 4 In each member of the vertical ribs 9 arranged in parallel with 4 and near the center in the longitudinal direction of the main girder 2, the following: ,
Shear reinforcing member 2 fixed to any of main girder-middle main girder-joint plate-longitudinal rib, middle main girder-joint plate, middle main girder-longitudinal rib, middle main girder-joint plate-longitudinal rib by welding 24
With 0, a high-rigidity joint beam 10 is formed. When the steel segments 1 are fastened by the necessary amount of fasteners 3 such as bolts via the joint beams 10, a joint structure of the steel segments 1 having large rigidity and strength is obtained. Is bent, so that there is no drawback that the tension bolt hardly contributes to the tensile force. Even if the longitudinal ribs 9 are bent by a strong tensile force, the joint plate 4 is not affected at all, and the effect as the joint structure is not reduced.

In particular, in the present invention, as described above, the shear reinforcing member 20 having the long side 21 having the same length as the vertical rib 9 and the short side 22 having the predetermined length in FIG.
1 is fixed to the upper end side surface of the vertical rib 9 and its short side 22 is fixed to the upper end side surface of the main girders 2 and 2a extending from the vertical rib 9 in the direction of the joint plate 4. That is, one side of the shear reinforcing member 20 is fixed to the vertical rib 9, and a space 26 at a predetermined interval is provided between the shear reinforcing member 20 and the joint plate 4.

[0032] By providing such a shearing reinforcement member 20, the tensile load from the main girder 2,2a is certainly is first transmitted to the shear reinforcement member 20, the shear reinforcement member 2 is a flat plate
Since it acts as a compressive force against zero, it is attenuated due to high shear resistance. For this reason, the tensile load from the main girders 2 and 2a is not transmitted to the fastener 3 such as a bolt or the joint plate 4 as a large bending and shearing force due to the load being eccentric, and the steel segment 1 as a joint structure is formed. Large joint strength and joint rigidity can be secured.

As described above, the shear reinforcing member 20 is provided with a single shear reinforcing member 20 between the pair of main girders 2 and 2a, and the main girders 2 and 2a and the vertical ribs 9 are welded 24 or the like. May be fixed to each intermediate main girder 2a, or the main girder 2 and the intermediate main girder 2a
A plurality of shear reinforcing members 20 divided according to the length between them
May be fixed to each of the longitudinal ribs 9 and each of the intermediate main girders 2a. In the latter case, a stronger shear resistance can be obtained.

Further, as it is shown as the first embodiment,
The shear reinforcing member 20 has a long side 21 having a length equal to that of the joint plate 4 and a short side 22 having a predetermined length. One side is fixed to the joint plate 4 and the other side is fixed to the main girders 2 and 2a. And the shear reinforcing member 2
In the case where a space 26 having a predetermined interval is provided between the vertical rib 9 and the vertical rib 9, the tensile load from the fixing tool 3 such as a bolt is reliably transmitted from the joint plate 4 to the shear reinforcing member 20 as described above. Then, it acts on the shear reinforcing member 20 as a tensile force against the flat plate, and the tensile load receives a large shear resistance and is reduced.

Further, as it is shown as a second embodiment,
The longest shear reinforcement member 20 has a long side 21 equal in length to the vertical rib 9 and the main girder 2, 2 a in the joint beam 10.
Has a short side 22 having a length equal to that of the joint beam 10 and covers the entire joint beam 10 and is fixed to the joint beam 10. 4 is securely transmitted to the shear reinforcing member 20 and acts as a tensile force on the shear reinforcing member 20 which is a flat plate, so that the tensile load is reduced by receiving a large shear resistance.

Further, as it is shown as a third embodiment,
The shear reinforcing member 20 has a long side 21 equal to the main girder 2, 2a in the joint beam 10, and a short side 22 having a predetermined length shorter than the length between the main girder 2 and the intermediate main girder 2a. Side 21
Are fixed to the upper side surfaces of the main girders 2 and 2a, and both short sides 22 are fixed to the upper side surfaces of the joint plate 4 and the upper ends of the vertical ribs 9 above the bolt holes 6 provided in the joint plate 4 and the vertical ribs 9, respectively. When the space 26 between the main girder 2 and the intermediate main girder 2a is covered with two shear reinforcing members 20 and a slit-shaped gap 25 having a predetermined width is provided in the center, the above-described shear reinforcing member 2
0 has substantially the same function and effect as in the second embodiment in which the joint beams 10 cover the entire top surface. Further, compared with the second embodiment, the weight of the shear reinforcing member 20 is reduced, the material can be saved, and the effect that the concrete can be injected from the gap 25 is also exerted.

Further, as it is shown as a fourth embodiment,
The shear reinforcing member 20 includes the longitudinal rib 9 and the joint plate 4.
It has a long side 21 of a predetermined length shorter than the length between them, and a short side 22 of a predetermined length shorter than the length between the main girder 2 and the intermediate main girder 2a. The short side 22 is fixed to the upper side surface of the vertical rib 9 above the bolt hole 6 provided in the vertical rib 9, and the short side 22 is fixed to the upper end side surface of the vertical rib 9, and a predetermined space is provided between the shear reinforcing member 20 and the joint plate 4. When the space 26 at intervals is provided and the gap 25 having a predetermined width in the form of a slit is provided at the center of the shear reinforcing member 20, substantially the same operation and effect as those of the above-described first embodiment or the above-described third embodiment can be obtained. . Further, there is an effect that the weight of the shear reinforcing member 20 is reduced, and the material is saved.

Further, as it is shown as a fifth embodiment,
The shear reinforcing member 20 in the first to fourth embodiments is connected to the main girders 2 and 2a in the joint beam 10.
When it is fixed to the longitudinal rib 9 and the intermediate portion in the thickness direction of the joint plate 4, the tensile load from the main girders 2, 2a is securely transmitted from the entire longitudinal rib 9 to the shear reinforcing member 20, In addition, since the tensile load from the fixing tool 3 such as a bolt is securely transmitted from the entire joint plate 4 to the shear reinforcing member 20, more secure
A joint structure having higher strength and higher rigidity can be configured. Other functions and effects are almost the same as those of the other embodiments.

Further, as it is shown as a sixth embodiment,
A plurality of predetermined concrete injection holes 23 are provided in the shear reinforcing member 20 in the second embodiment within a range that does not hinder the structure, and the concrete is smoothly injected.

As shown in FIGS. 13, 15, and 18, the joint plate 4, the vertical rib 9, and the main beams 2, 2a in the first to sixth embodiments are used. By filling the interior space of the formed joint beam 10 with the concrete 28, a highly rigid beam of a concrete composite structure surrounded by a steel plate is formed on the back surface of the joint plate 4. When the first and second steel segments 1 are fastened and fixed by the fastener 3 via the composite structural joint beam 11, a joint structure of the steel segments 1 having extremely high rigidity and strength is obtained. .

As a joining method for filling the concrete, as shown in the seventh embodiment, before the opposed steel segments 1 are fixed by the fixing tool 3, the joining beam 10 is fixed.
The interior space is filled with concrete to join the composite structural beam 11
When the fixing member 3 is formed as a solid pipe, the fixing member 3 such as a bolt is tightened after the concrete is hardened.
It is necessary to fill the concrete after coating with such as.

Further, as it is shown as an eighth embodiment, after via the joining beams 10 secured by fasteners 3 the steel segment 1, concrete in the joint beam 10 - When filling the door is directly fixed It is good to bury and kill the tool 3.

[0043] Further, as shown as the ninth embodiment,
A bolt hole 6 is provided in the joint plate 4, and a fastener having a predetermined length is provided in the bolt hole 6 of the joint plate 4 of the first steel segment 1 and the second steel segment 1 opposed thereto. 3 is covered with a circular pipe or the like and locked, and the back surface of the joint plate 4 is filled with a concrete of a predetermined width to form a joint beam 10. When the two steel segments 1 are tightened and fixed, the work can be performed smoothly because the structure is simple, and the steel segments 1 having a certain rigidity and strength because they are borne by concrete. A joint structure can be obtained.

[0044] Further, as shown as a tenth embodiment, in the joint structure of a steel segment of the ninth embodiment, the case of providing the shear reinforcement member 20, the action of the joint structure of the ninth embodiment described above In addition to the effect, the tensile load from the fasteners 3 such as bolts
0 and acts as a tensile force on the shear reinforcing member 20 which is a flat plate, so that the tensile load is reduced by receiving a large shear resistance.

Further, as shown in the eleventh embodiment, in the main beam 2 and the steel segment 1 in which the joint plate 4 is joined to the end of the main beam 2, the shearing shown in the first embodiment is performed. A reinforcing member 20 is fixed to the joint plate 4, a bolt hole 6 is provided in the joint plate 4, and a first steel segment 1 and a second steel segment 1 opposed thereto are provided.
Is fastened and fixed by the fixing device 3 via the joint plate 4, the structure is extremely simple, the operation can be performed smoothly, and the tensile load from the fixing device 3 such as a bolt can be reduced. Since it is reliably transmitted from the plate 4 to the shear reinforcing member 20 and acts as a tensile force on the shear reinforcing member 20 which is a flat plate, the tensile load is reduced by receiving a large shear resistance, and thus has a certain rigidity and strength. The joint structure of the steel segment 1 can be obtained.

[0046] between the front and rear left and right rectangular annulus steel segment 1 that construction of the through annular water packing fitted in the concave groove 14 are watertightly bonded, ground spring water is water leakage from between the steel segments Never do.

[0047]

According to the present invention, a rigid joining beam surrounded by a main girder, a joint plate and a vertical rib is formed at an end of a main girder of a steel segment. A joint structure of a steel segment having a large rigidity and strength capable of fastening the steel segment with a necessary amount of fasteners such as bolts is obtained.

Further , by providing the shear reinforcing member,
The tensile load from the main girder is not eccentrically transmitted to the fasteners such as bolts and the joint plate as large bending and shearing forces. The tensile load from the main girder is reliably transmitted to the shear reinforcing member first, and acts as a compressive force on the flat shear reinforcing member. Joint strength and joint rigidity can be secured. Further, when a plurality of divided shear reinforcing members are fixed to each of the longitudinal ribs and each of the intermediate main girders 2a, a stronger shear resistance can be obtained.

[0049] Further, in this bonding beam concrete - will be beamed high rigidity bets composite structure is formed, - concrete enclosed by steel plates to the back of the joint plate by filling bets
When the steel segments are fastened with a necessary amount of fasteners such as bolts through the beams, a joint structure of steel segments having extremely high rigidity and strength is obtained.

[0050] Further concrete across the junction beam or steel segments - in the bonding method of filling the door, because until the clamping fixation of the steel segment by assembling the fastener segments, only the steel segment construction of lightweight The workability is good and the steel structuring of the joint part can be done simply by laying concrete at the end, which makes the work easier.

Further , since the joint beam is formed and supported by a fixing tool such as a bolt, only a compressive force is generated at the welded portion between the joint plate and the main girder, so that low cost fillet welding can be used. ,
This has the effect of significantly reducing the cost of the steel segment.

In addition, since the bolts or screw rods used in the present joint structure are generally long, they have a large elongation when tightened, and have little looseness such as short bolts and screw rods.

[Brief description of the drawings]

FIG. 1 is a perspective view of a steel segment showing a first embodiment of the present invention.

FIG. 2 is a front view of a steel segment in a state in which a fastener is accommodated therein.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a sectional view taken along line BB of FIG. 2;

FIG. 5 is a perspective view of a steel segment showing a second embodiment of the present invention.

FIG. 6 is a longitudinal sectional view showing a connected state of the steel segments of FIG. 5;

FIG. 7 is a perspective view of a steel segment showing a third embodiment of the present invention.

FIG. 8 is a longitudinal sectional view of the connected state of the steel segments of FIG. 7;

FIG. 9 is a perspective view of a steel segment showing a fourth embodiment of the present invention.

FIG. 10 is a longitudinal sectional view showing a fifth embodiment of the present invention, in which steel segments are connected.

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

FIG. 12 is a perspective view of a steel segment showing a sixth embodiment of the present invention.

FIG. 13 is a longitudinal sectional view of the steel segments in FIG. 12 in a connected state.

FIG. 14 is a perspective view of a steel segment showing a seventh embodiment of the present invention.

15 is a longitudinal sectional view of the steel segments in FIG. 14 in a connected state.

FIG. 16 is a perspective view of a steel segment showing an eighth embodiment of the present invention.

FIG. 17 is a longitudinal sectional view of the connected state of the steel segments of FIG. 16;

FIG. 18 is a perspective view of a steel segment showing a ninth embodiment of the present invention.

19 is a longitudinal sectional view of the steel segments in FIG. 18 in a connected state.

FIG. 20 is a perspective view of a steel segment showing a tenth embodiment of the present invention.

21 is a longitudinal sectional view of the steel segments in FIG. 20 in a connected state.

FIG. 22 is a sectional view taken along line DD of FIG. 19;

FIG. 23 is a sectional view taken along line EE in FIG . 21;

FIG. 24 is a perspective view of a steel segment showing an eleventh embodiment of the present invention.

25 is a longitudinal sectional view of the steel segments in FIG. 24 in a connected state.

FIG. 26 is a longitudinal sectional view showing a connection state of steel segments as a twelfth embodiment of the present invention.

FIG. 27 is a longitudinal sectional view showing a connection state of steel segments as a thirteenth embodiment of the present invention.

FIG. 28 is an explanatory sectional view showing a state where the steel segment according to the present invention is assembled as a tunnel inner wall having a rectangular section.

FIG. 29 is a front view of a state in which a plurality of steel segments of FIG. 1 are being joined.

30 is a sectional view taken along line FF of FIG. 29.

FIG. 31 is a sectional view taken along the line HH in FIG. 29;

FIG. 32 is a sectional view taken along the line II of FIG. 29;

FIG. 33 is a front view showing a state where joining of the plurality of steel segments in FIG. 29 has been completed.

FIG. 34 is a sectional view taken along the line JJ of FIG. 33;

Claims (3)

(57) [Claims] 1. A main girder and a joint plate joined to an end of the main girder.
Parallel to the joint plate, and closer to the longitudinal center of the main girder.
To form a steel segment by joining longitudinal ribs
2 of the steel segment secured over the respective joint plate
Tool, and fasten both steel segments with this fastener.
In the joint structure of steel segments that are attached and fixed,
Shear shearing member in a direction perpendicular to the main girder and the joint plate.
Arranging the shear reinforcing member in front of the main girder and the joint plate.
At the time of joining to the vertical rib, the middle part in the thickness direction of the joint plate
To form a joint beam, and
So that the vertical ribs of both steel segments are firmly fixed to each other.
A joint structure of a steel segment, characterized in that: 2. The method according to claim 1, wherein the shear reinforcing member is arranged in a segment thickness direction.
It is characterized by the fact that a plurality of
The joint structure for a steel segment according to claim 1. 3. A method according to claim 1, wherein a plurality of predetermined concretes
While providing a reet injection hole, the joint plate, the vertical
Of the joining beam formed by the rib and the main girder
Fill the side space with concrete to form a composite structural beam.
And the first and second steels are connected through the composite structural beam.
The product segment is fastened and secured by the fastener.
The steel segment according to claim 1 or 2, characterized in that:
Mention joint structure.