JP3268110B2 - Segment joint structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining structure of segments used for constructing a tunnel wall.

[0002]

2. Description of the Related Art As is well known, a general structure of a tunnel wall is constructed by arranging a plurality of segments in a circumferential direction and an axial direction of a drilling hole and fastening them. . Various means for fastening each segment in such a tunnel wall body have been proposed, for example, those shown in FIGS. 9 and 10 have been proposed. In the joining structure of the segments shown in FIGS. 9 and 10, as shown in FIG. 9, a plurality of segments 1, 1,... Formed in a hexagonal shape are connected to each other by long bolts 2 for joining the segments. Thus, the tunnel is constructed by forming the cylindrical wall body 3. Describing the segment 1, a bolt insertion hole 4 is formed in the segment 1 so as to penetrate between one joint end surface and the other joint end surface. As shown in FIG. 9, a recess 5 is formed at one end of the segment main body 1a so as to communicate with the bolt insertion hole 4. A sheath tube 4a is fitted into the bolt insertion hole 4. A cylindrical connection body 6 (made of metal) having a bottom is embedded in the concave portion 5 with its opening 6 a side facing the opening side of the concave portion 5. A female screw 6b is formed on the inner surface of the opening 6a of the connecting body 6. The long bolt 2 is inserted through the connecting member 6 and the sheath tube 4a, and the connecting member 6 is connected to the connecting member 6 in a state where the head 2a of the long bolt 2 can be locked to the bottom 6c of the connecting member 6 via the washer 2b. The plate 7 (made of metal) is screwed. A female screw hole 7a is formed at the center of the connecting disk 7, and a male screw 7b screwed to the female screw 6b of the connecting body 6 is formed on the outer periphery of the connecting disk 7. Segment 1 is
The connecting disk 7 is not screwed into one segment 1,
When the connecting disk 7 is screwed into the other segment 1, the male screw 2 c at the tip of the long bolt 2 inserted into the one segment itself is connected to the connecting circle of the other segment 1 to be joined. The female screw holes 7a of the plate 7 are screwed and tightened to be joined together. After this joining, the connecting disk 7 is screwed to the connecting body 6 of the one segment 1.

In the joining structure of the segments 1 using the long bolts 2, the joining stress of the segments 1 is supported not only in the vicinity of the joining end face but also in the entire segment 1, so that a reliable press-contact state of the segments 1 is secured. can do.

[0004]

However, in the above-described segment joining structure, since the metal such as the connecting body 6 is embedded in the segment 1, the metal is used in the segment main body from the production of the segment 1 to immediately before use. 1a may be corroded by moisture or the like, and if these metal parts are corroded and their screw parts are damaged, or if dents are formed in the screw parts and the screw parts are damaged, the entire segment 1 becomes unusable. There was a problem. For this reason, it is necessary to protect the metal part such as the connecting body 6 from being corroded and to protect the screw portion of the connecting body 6 and the like. Further, since the connecting disk 7 screwed to the connecting body 6 corresponds to a normal nut, the connecting disk 7 is formed at the end of the female screw hole 7a of one connecting disk 7 and the other bolt in joining the segments 1. The female screw hole 7a and the male screw portion 2c are provided between the male screw portion 2c and the male screw portion 2c.
There is almost no margin (flexibility to absorb the displacement) with respect to the misalignment of the bolt and the displacement of the insertion angle of the bolt into the female screw hole 7a. For this reason, when the position of the adjacent segment is shifted during the construction of the segment, there is a disadvantage that the fastening becomes extremely difficult, and when the axis of each bolt is obliquely shifted from the expected position, the There has been a problem that the male screw portion 2c and the female screw 6b portion of the connecting body 6 are damaged, resulting in incomplete fastening. The present invention has been made in view of the above circumstances, and it is not necessary to protect a threaded portion at a joint portion, and it is possible to prevent the occurrence of damage to the threaded portion. It is an object of the present invention to provide a joint structure of segments that can surely perform fastening of each segment.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a method in which a borehole is oriented in a certain direction along the axis.
Next, a joining structure of segments that form a cylindrical wall in the axial direction of the drilling hole by joining a plurality of segments to each other, wherein each segment has a recess formed on one side of an end face of joining with an adjacent segment. And a buried plate is buried at the bottom of the recess, and the buried plate is fixed to the surface of the recess in the recess in a state where the facing surface of the buried plate is opposed to the buried plate .
Provided Rukoto without bolt connecting member, and between said one joint end face and the other joining end face of the cross-section in a state of being through the bolt connecting member, and buried plate Bol
Bolt insertion hole of the size to make the
In the bolt insertion hole of the segment, a bolt having a rectangular head at one end is inserted and arranged so that the head is located on the other joint end face side, and the other end of the bolt is inserted. Is fastened and fixed to one joint end face side of the segment by a nut in the recess, and a cap having a rectangular opening is attached to the bolt connection member, and the bolt connection member is connected to the bolt connection member side. A head of a bolt protruding from a segment adjacent to the cap is inserted into the cap through the opening and is engaged with the cap.

[0006]

In the present invention, a bolt connecting member is inserted into the recess of the segment with its own opposing surface facing the buried plate, a bolt is inserted into the bolt insertion hole of the segment, and a head on one side of the bolt is inserted. Is positioned on the other joint end face side of the segment. The other end of the bolt is fastened and fixed to one of the joining end faces of the segment by a nut in the recess. When fastening a segment adjacent to the bolt connecting member side, a cap is attached to the bolt connecting member, a bolt head protruding from the adjacently arranged segment is opposed to an opening of the cap, and the head is attached. The head is engaged with the cap by inserting it into the cap and rotating the bolt. Further, the other end of the bolt is fastened and fixed to one joint end face side of the segment by screwing a nut in the recess as described above. In the joining structure of the segments having such a structure, the bolt connecting member can be formed separately from the segment from manufacture of the segment to immediately before use, so that corrosion of the bolt connecting member and damage to the screw portion are prevented. . In addition, when the mutual positions of the adjacent segments are slightly shifted, or when the axis of each bolt is obliquely shifted from the intended position, the head of the bolt can be displaced in the cap. Can be absorbed, and an unreasonable force is not applied to the fastening portion, and secure fastening is performed.

[0007]

1 to 7 show a first embodiment of the present invention.
It will be described based on. In FIG. 1, reference numerals 10 and 10 denote a plurality of hexagonally formed concrete segments to be joined to each other. In this embodiment, adjacent segment bodies 11 and 11 are embedded in these segment bodies 11. A buried plate 25, a bolt connecting socket 12 (bolt connecting member) opposed to the buried plate 25, a cap 13 screwed to the bolt connecting socket 12, a bolt connecting socket 12, a buried plate A bolt 14 inserted through the segment 25, the segment body 11, and the cap 13 and a nut 15 screwed to the bolt 14 are fastened.

As shown in FIG. 2, the segment 10 includes a segment main body 11, an embedded plate 25 embedded in the segment main body 11, and a sheath inserted into a bolt insertion hole 16 formed in the segment main body 11, which will be described later. Tube 1
It consists of seven. The segment 10 has a plurality of recesses 21 formed in advance on one side of the joint end face with the adjacent segment 10, and communicates with the recess 21 to form one joint end face 28 and the other joint end. A bolt insertion hole 16 is formed between the bolt insertion hole 16 and the end surface 29. Bolt insertion hole 1
Reference numeral 6 denotes a hole having a rectangular cross section.
6 is fitted with a sheath tube 17 having a rectangular cross section. An outer peripheral surface of the sheath tube 17 is in contact with an inner surface of the bolt insertion hole 16, and a rectangular hole 18 is formed in the sheath tube 17.
Are formed. The burying plate 25 is a plate having an outer diameter larger than the inner diameter of the bottom of the recess 21 and is buried in the bottom of the recess 21.
A rectangular hole 26 communicating with 7 is formed. The rectangular hole 26 has substantially the same size as the rectangular hole 18 of the sheath tube 17 and is concentric with the sheath tube 17.

A bolt connecting socket 12 is inserted into the recess 21 of the segment 10 when the segments 10 to be joined are joined. Socket 12 for bolt connection
As shown in FIGS. 1 and 3, the bottom plate 2
3 (bottom) is a cup-shaped member integrally provided, and the bottom plate 23 is formed of a disk having an outer circumference substantially the same diameter as the outer circumference of the cylinder 22. In the bottom plate 23, a rectangular hole 24 communicating with the rectangular hole 26 of the burying plate 25 is formed. This rectangular hole 24 has the same shape as the rectangular hole 26 of the burying plate 25,
It is the same size and is formed so as to be concentric with the rectangular hole 26. A male screw 27 is provided on the outer peripheral surface of the cylinder 22.
Are formed. The bolt connection socket 12 has a rectangular hole 26 in the burying plate 25 and a rectangular hole 24 in the bottom plate 23.
The recess 2 is formed in a state in which the outer bottom surface 23a (opposing surface) of the bottom plate 23 faces the burying plate 25 so that
1 is inserted. At this time, the rectangular hole 18 of the sheath tube 17, the rectangular hole 24 of the bottom plate 23, and the burying plate 25
The bottom plate 23 of the bolt connection socket 12 and the buried plate 2 are provided between the one joint end surface 28 and the other joint end surface 29 of the segment 10 shown in FIG.
5, the bolt insertion hole 30 is formed.

As shown in FIG. 1, the bolt 14 is a long bolt having a head 31 having a rectangular cross section at one end of a bolt shaft 19 and a male screw formed at the other end. The head 31 is loosely inserted into the bolt insertion hole 30 so that the head 31 is located on the other joint end surface 29 side of the segment 10. The other end of the bolt 14 is connected to the segment 10 by the nut 15 in the socket 12 for bolt connection.
Is fixedly fastened to one of the joining end surfaces 28. The rectangular hole 26 of the burying plate 25 and the rectangular hole 24 of the bottom plate 23
The rectangular holes 18 of the sheath tube 17 may be circular holes. The back surface of the head 31 of the bolt 14, that is, the bolt 1
The surface on the other end side of 4 is formed in a spherical shape having a large radius of curvature. At the edge of the head 31 of the bolt shaft 19, a rectangular step portion 20 for preventing the rotation of the bolt 14 is formed. The rectangular step portion 20 for preventing rotation is formed to have a thickness of about 5 mm in the axial direction of the bolt shaft 19. The other end surface (tip surface) of the bolt 14 has a rectangular head 3
A driver groove (not shown) extending in the long side direction of one is formed. The direction of the long side of the head 31 is indicated by the extending direction of the driver groove.

As shown in FIGS. 1, 4 and 5, the cap 13 is provided with a lid plate 33 integrally provided at the upper end of a cylinder 32. The lid plate 33 has a head 31 of the bolt 14 attached thereto. A rectangular hole (opening) that can pass loosely is formed.
On the inner peripheral surface of the cylinder 32, a female screw 35 which can be screwed to the male screw 27 of the bolt connecting socket 12 is formed. The cap 13 is, as shown in FIG.
Is screwed to the bolt connection socket 12 in a state where the other end is fastened and fixed to the one joint end surface 28 side of the segment 10 by the nut 15 in the bolt connection socket 12. On the cover plate 33 of the cap 13, the head 31 of the bolt 14 protruding from the segment 10 adjacent to the bolt connecting socket 12 shown in FIG.
Is inserted into the bolt connection socket 12 through the rectangular hole 34 (opening) and engaged in a turned state. The lower surface of the cover plate 33, that is, the portion where the back surface of the head 31 of the bolt 14 is engaged is formed of a spherical surface having substantially the same curvature as the back surface of the head 31 so that the back surface of the head 31 is in surface contact. A concave surface 36 is formed.

Next, the operation of the joint structure of the segments configured as described above will be described. When joining one segment 10 and the other segment 10 to be joined thereto, the bolt insertion hole 1
6, the sheath tube 17 is fitted, and the burying plate 25 is buried in the recess 21.
The bolt connection socket 12 is inserted through the buried plate 25 with the outer bottom surface 23a of the bottom plate 23 facing the buried plate 25. Then, the bolt 14 is inserted into the bolt insertion hole 30 of the segment 10 in a state where the cap 13 is not attached to the socket 12 for bolt connection. In this case, the head 31 is fitted into the bolt connection socket 12 such that the head 31 on one side of the bolt 14 is positioned on the other joint end surface 29 side of the segment 10, and then the head 31 of the bolt connection socket 12 is Bottom plate 2
The bolt 14 is inserted from one of the joint end surfaces 28 toward the other joint end surface 29 through the third rectangular hole 24.
Then, the bolt 1 is inserted into the bolt connecting socket 12.
A nut 15 is screwed onto the other end of the bolt 4 on the other end of the bolt 14 and fastened and fixed to one of the joining end faces of the segment 10. When the rectangular holes 26, 24, and 18 are the circular holes 2, the other end of the bolt 14 is inserted into the circular hole of the sheath tube from the joint end surface 29 side of the segment 10, and then the segment 10 is removed. It is arranged adjacent to the existing segment 10.

Next, when fastening the segment 10 adjacent to the bolt connecting socket 12 side, a cap 13 is screwed and mounted on the bolt connecting socket 12, and the head of the bolt 14 protruding from the adjacently arranged segment 10 is mounted. The head 31 is opposed to the rectangular hole 34 (opening) of the lid plate 33 of the cap 13 so that the head 31 is
The head 31 is engaged with the cover plate 33 of the cap 13 by inserting the bolt 14 into the socket 12 for bolt connection, turning the bolt 14 in a predetermined direction, and pulling up. In this case, a gap exists between the cover plate 33 of the cap 13 and the joint end surface 29 of the adjacently arranged segment 10. The other end of the bolt 14 is, as described above,
The nut 15 is screwed into the other end of the bolt 14 in the bolt connection socket 12 of the segment 10 to be fastened and fixed to one of the joining end surfaces 28 of the segment 10. At this time, the bolt 14 is prevented from rotating by the rotation-stopping rectangular step 20 abutting against the inner surface of the rectangular hole 34.

In the segment joining structure having such a structure, the bolt connecting socket 12 and the cap 13 are connected to the segment 1 from the production of the segment 10 to immediately before use.
Therefore, corrosion of the bolt connection socket 12 and the cap 13 and damage of the screw portion of the bolt connection socket 12 and the cap 13 due to corrosion or impact can be prevented. Also, the adjacent segment 1
When the mutual positions of 0, 10 are slightly shifted, each bolt 14,
In the case where the axis of the bolt 14 is deviated from the intended position and becomes oblique, the head 31 of the bolt 14 can be displaced in the cap 13 and the buried plate 25 and the bottom plate 23 of the bolt connecting socket 12 can be displaced. Is possible, the displacement of the axis of the bolt 14 can be absorbed, and an excessive force is not applied to the fastening portion, so that the fastening is securely performed.

Next, a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. In the second embodiment, a disk 41 (bolt connecting member) having a center hole is used instead of the bolt connecting socket 12 in the first embodiment. The outer diameter of the disk 41 is slightly smaller than the inner diameter of the bottom of the recess 21, and a rectangular hole 42 communicating with the rectangular hole 26 of the burying plate 25 is formed at the center of the disk 41. . The rectangular hole 42 has the same shape and size as the rectangular hole 26 of the burying plate 25 and is formed so as to be concentric with the rectangular hole 26. On the outer peripheral surface of the disk 41, a male screw 43 screwed to the female screw 35 of the cap 13 is formed.

The lower surface 44 (opposing surface) of the disk 41 shown in FIG. 8 is connected to the embedded plate 25 so that the rectangular hole 26 of the embedded plate 25 and the rectangular hole 42 of the disk 41 are coaxial. It is inserted into the recess 21 in a state of facing. At this time, the rectangular hole 18 of the sheath tube 17, the rectangular hole 42 of the disc 41, and the rectangular hole 26 of the
Thus, a bolt insertion hole 45 is formed between the one joint end surface 28 and the other joint end surface 29 of the segment 10 shown in FIG.

The bolt 14 has a head 31 with a segment 10
Is loosely inserted into the bolt insertion hole 45 so as to be located on the other joint end face 29 side. The other end of the bolt 14 is fastened and fixed to the one joint end surface 28 side of the segment 10 by the nut 15 above the disk 41 in FIG.

As shown in FIG. 8, the disk 41 has the other end of the bolt 14 fastened and fixed to the one joint end surface 28 of the segment 10 by the nut 15 in the recess 21 as shown in FIG. The cap 13 is mounted by screwing the female screw 35 to the male screw 43 of the disk 41. Cap 1
The head plate 31 of the bolt 14 protruding from the segment 10 adjacent to the disk 41 shown in FIG. Is engaged.

Next, the operation of the joint structure of the segments configured as described above will be described. When joining one segment 10 and the other segment 10 to be joined thereto, the bolt insertion hole 1
6, the sheath tube 17 is fitted, and the burying plate 25 is buried in the recess 21.
The disc 41 is inserted with the lower surface 44 facing the burying plate 25. Then, the bolt 14 is inserted into the bolt insertion hole 45 of the segment 10 in a state where the cap 13 is not mounted on the disk 41. In this case, the head 31 is fitted into the recess 21 so that the head 31 on one side of the bolt 14 is located on the other joint end surface 29 side of the segment 10, and then through the rectangular hole 42 of the disc 41, One joint end face 2
The bolt 14 is inserted from the 8 side to the other joint end surface 29 side. Then, the nut 15 is screwed into the other end of the bolt 14 in the recess 21 and the nut 15 above the disc 41 in FIG. Fasten and fixed to the 28 side.

Next, when fastening the segment 10 adjacent to the disk 41 side, the cap 13 is screwed and mounted on the disk 41, and the head 31 of the bolt 14 protruding from the adjacent segment 10 is attached. Lid plate 33 of cap 13
The head 31 is opposed to a rectangular hole 34 (opening) of the head 31.
Is inserted into the cap 13 through the rectangular hole 34, and the head 31 is engaged with the cover plate 33 of the cap 13 by rotating and pulling up the bolt 14 in a predetermined direction.
As described above, the other end of the bolt 14 is screwed with the nut 15 to the other end of the bolt 14 in the recess 21 of the segment 10 so that the one end face 28 of the segment 10 is To secure. At this time, the bolt 14 is prevented from rotating by the rotation-stopping rectangular step 20 abutting against the inner surface of the rectangular hole 34.

In the joint structure of the segment according to the second embodiment having such a structure, the disk 41 and the cap 13 are connected to the segment 10 from the manufacture of the segment 10 to immediately before use, similarly to the joint structure of the segment of the first embodiment. Since the disk 41 and the cap 13 can be separately formed, corrosion of the disk 41 and the cap 13 and damage of the screw portion of the disk 41 and the cap 13 due to corrosion or impact can be prevented. Also, when the mutual positions of the adjacent segments 10, 10 are slightly displaced, or when the axes of the bolts 14, 14 are deviated from the intended positions and are oblique, the head 31 of the bolt 14 is capped. 13
Inside, and the relative displacement between the burying plate 25 and the disc 41 is possible, so that the displacement of the axis of the bolt 14 can be absorbed, and no excessive force is applied to the fastening portion. Reliable fastening is performed. Further, according to the segment joining structure of the second embodiment, one joining end surface of the segment 10 is provided by the nut 15 in the recess where the other end of the bolt 14 (the end on the tip side of the bolt) is wide. Since it is fastened and fixed to the side, the fastening work of the bolt 14 by the nut 15 becomes easy, and there is no possibility of damaging surrounding members.

In each of the above embodiments, an example in which the present invention is applied to the case where adjacent hexagonal segments 10 are joined has been described. However, the present invention is not limited to this.
For example, it goes without saying that the present invention may be applied to the joining of adjacent rectangular segments.

[0023]

According to the present invention, the segment, the bolt connecting member and the cap can be formed separately from the production of the segment until immediately before use, and the segment is formed at the time of joining the segment when the segment is constructed. Since the segments can be joined by inserting the bolt connecting members into the recesses, corrosion of the bolt connecting members and the caps of the segment connecting portions and the bolt connecting members,
Damage due to corrosion or impact on the thread of the cap can be prevented, and if the mutual positions of adjacent segments are slightly shifted, the axis of the bolt inserted into each segment is deviated from the expected position and is inclined. Even if it is the case, since the head of the bolt can be displaced in the cap, it becomes possible to absorb the deviation of the axis of the bolt,
An unreasonable force is not applied to the fastening portion, so that the joining of the adjacent segments becomes easy, the damage of the screw portion of the bolt can be prevented, and the adjacent segments can be securely fastened.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of the present invention, and is a cross-sectional view of a main part showing a joined state of segments.

FIG. 2 is a sectional view of a segment showing the first embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a state in which a bolt connection socket is inserted into a recess of a segment according to the first embodiment of the present invention.

FIG. 4 is a plan view of a cap showing the first embodiment of the present invention.

FIG. 5 is a side sectional view of the cap showing the first embodiment of the present invention.

FIG. 6 is a sectional view of a main part in which a bolt is inserted into a segment according to the first embodiment of the present invention.

7 is a view as viewed in the direction of the arrow A in FIG. 6;

FIG. 8 is a cross-sectional view of a main part showing a second embodiment of the present invention and showing a joined state of segments.

FIG. 9 is a schematic view of a main part showing a conventional segment joining structure.

FIG. 10 is a cross-sectional view showing a state where a bolt is inserted into a conventional segment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Segment 11 Segment main body 12 Bolt connection socket (bolt connection member) 13 Cap 14 Bolt 15 Nut 16 Bolt insertion hole 21 Concave 23 Bottom plate (bottom) 23a Outer bottom surface (opposite surface) 25 Buried plate 28 One joint end surface 29 The other joint end face 30 Bolt insertion hole 31 Head 34 Rectangular hole (opening) 41 Disk (bolt connecting member) 44 Lower surface (opposing surface) 45 Bolt insertion hole

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kenji Arakawa 2-2-2 Matsuzakicho, Abeno-ku, Osaka-shi, Osaka Prefecture Inside Okumura Gumi Co., Ltd. (72) Inventor Saburo Okuno 2-chome, Matsuzakicho, Abeno-ku, Osaka-shi, Osaka No. 2 Okumura Gumi Co., Ltd. (56) References JP-A-6-739982 (JP, A) JP-A-63-118433 (JP, A) JP-A-1-203595 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) E21D 11/04

Claims (1)

(57) [Claims] 1. A joint structure of segments that form a cylindrical wall in the axial direction of a drill hole by sequentially joining a plurality of holes to each other in a predetermined direction of the axis of the drill hole. A recess is formed on one side of the joint end face with the adjacent segment, and a bolt connecting member is provided in the recess with the bottoms thereof facing each other without being fixed to the surface of the recess. The bolt connecting member is communicated between the one joint end face and the other joint end face ,
Is formed with a bolt insertion hole having a size that allows the bolt to be in a loose state. The bolt insertion hole of the segment has a bolt having a rectangular head at one end, and the head has the other end. The other end of the bolt is inserted and arranged so as to be located on the joint end surface side, and the other end of the bolt is fastened and fixed to one joint end surface side of the segment by a nut in the recess, and the bolt connecting member has a rectangular shape. A cap having an opening is attached, and a head of a bolt protruding from a segment adjacent to the bolt connecting member side is inserted into the cap through the opening and is engaged with the cap. A segment joining structure characterized by the following.