JP2005002706A - Joint hardware for segment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint metal fitting for a segment, for securing rigidity to shearing force and tensile force acting on a joint part, by integrally casting a hardware body and an anchor member. <P>SOLUTION: The joint metal fitting 30 for the segment is composed of a bolt installing part 31 for forming a bolt inserting hole 31s, a joint body 34 for forming a fastening space part 33 arranged on the back face side of this bolt installing part 31, a first anchor member 35 projected in parallel to the shaft direction of the bolt inserting hole 31s from the outer peripheral part back face side of this joint body 34, and a second anchor member 36 projected in the center of an outer peripheral part of the joint body 34, so as to incline obliquely backward to a side surface 10c becoming a connecting surface of the segments 10 and 10 adjacent in the axis direction of a heading. The joint body 34, the first anchor member 35, and the second anchor member 36 are integrally formed by casting. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a joint structure of segments, and more particularly to a joint fitting for a segment used when bolting between adjacent segments.
[0002]
[Prior art]
FIG. 9 is a perspective view of a segment 50 provided with a conventional bolted joint fitting. The segment 50 is formed in an arc shape in the circumferential direction. Fastening space portions 51 and 51, which are spaces for fastening bolts or nuts, are formed on both end faces 50a and 50b in the circumferential direction of the segment 50. Circumferential spaces are formed in the fastening space portions 51 and 51. Joint plates 52 and 52 for bolting the segments 50 and 50 adjacent in the direction are provided. Bolt holes 52 s and 52 s are formed in the joint plates 52 and 52, respectively. The bolts are inserted from the fastening space portion 51 of one segment 50 through the bolt holes 52 s of the joint plate 52, and the bolts are connected to the other side. The segments 50 and 50 adjacent to each other in the circumferential direction are coupled to each other by fixing the joint plate 52 of the segment 50 with a nut.
Further, as shown in FIGS. 10A and 10B, a joint plate 53 in which a pin member insertion hole 53s is formed is disposed on the side face 50c on the face side of the segment 50. On both inner surfaces of the plate 53, rib plates 54, 54 project inward, and a fastening space 55 is formed between the rib plates 54, 54. Further, a flat steel 56 in which a communication hole 56 s communicating with the pin member insertion hole 53 s is formed between the rib plates 54, 54 on the back side of the joint plate 53 is attached. On the other hand, at a position facing the joint plate 53 on the side surface 50d on the wellhead side of the segment 50, a pin member 58 having a tip projecting from the side surface 50d and having a cap screw 57 at the tip is fixed. When the segments 50, 50 adjacent to each other in the tunnel axis direction are coupled to each other, the distal end portion of the pin member 58 is inserted into the pin member insertion hole 53s and the communication hole 56s to be fitted, and the fastening is performed. The bolt 60 is screwed into the bag screw 57 from the space portion 55 through the washer 59 and fastened.
[0003]
Further, in the joint structure, in order to ensure rigidity against shearing force and tensile force acting on the joint portion, on the joint plate 53 side, the outer peripheral portions of the rib plates 54 and 54 are respectively connected to the connection surfaces of the segments. The joint plate 53 and the rib plate 54 are arranged by arranging two anchor members 61 and 61 inclined obliquely rearward and two anchor members 62 and 62 projecting in parallel with the axial direction of the bolt insertion hole. 54, and a U-shaped anchor member 63 around which the pin member 58 is wound is disposed on the pin member 58 side to reinforce the pin member 58 (for example, Patent Document 1).
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 7-109895 (page 4, FIGS. 1 to 3)
[0005]
[Problems to be solved by the invention]
However, in the joint structure, the anchor members 61 and 61 and the anchor members 62 and 62 for reinforcing the joint plate 53 side and the U-shaped anchor member 63 for reinforcing the pin member 58 must be retrofitted with screws or the like. As a result, work efficiency was poor. Therefore, a joint metal integrally formed with the joint plate 53 and the rib plates 54 and 54 and the anchor members 61 and 62 attached to the joint metal, or the pin member 58 and the U-shape attached to the pin member 58. It is conceivable that the anchor material 63 is integrally formed by casting. However, since the number of anchors is large and the anchor mounting structure is complicated, the casting is not only technically difficult to manufacture, but also a mold. There was a problem that the production cost would be high.
[0006]
The present invention has been made in view of the conventional problems. The metal body and the anchor member can be integrally cast, and the rigidity against the shearing force and the tensile force acting on the joint portion can be ensured. An object is to provide a joint fitting for a segment.
[0007]
[Means for Solving the Problems]
As a result of intensive studies, the inventors have been able to integrally cast the joint hardware body and the anchor member by combining the anchor materials to be attached to the joint hardware into one joint. It has been found that the rigidity against the acting shearing force and tensile force can be sufficiently secured, and the present invention has been achieved.
That is, the invention described in claim 1 of the present invention is a joint fitting for a segment for fastening adjacent segments, and the bolt mounting portion in which a bolt insertion hole opened on the side surface of the segment is formed, and the bolt A joint body having a fastening space provided on the back side of the insertion hole and an anchor member protruding in parallel with the axial direction of the bolt insertion hole from the back side of the outer peripheral part of the joint body by casting It is characterized by being formed integrally.
Moreover, the invention according to claim 2 is the joint metal fitting for segment according to claim 1, wherein a second anchor member that is inclined obliquely rearward with respect to the connection surface of the segment is provided on the outer periphery of the joint body. In addition, the joint body, the anchor member, and the second anchor member are integrally formed by casting.
[0008]
According to a third aspect of the present invention, in the joint fitting for a segment according to the first or second aspect, the distal end portion of the insert hardware provided with a cap screw at the distal end portion is inserted into the distal end side of the joint body. An insert hardware insertion hole is provided, and a tapered portion is provided at the opening of the insert hardware insertion hole for guiding the tip of the insert hardware.
According to a fourth aspect of the present invention, in the joint fitting for a segment according to the third aspect, the inner diameter of the bolt insertion hole is smaller than the inner diameter of the insert hardware insertion hole.
[0009]
Further, the invention according to claim 5 is a joint fitting for a segment for fastening adjacent segments, and is provided with a hardware main body having a cap screw at a tip portion, and projecting on an outer peripheral side of the hardware main body. The anchor member extending obliquely rearward with respect to the connecting surface of the segment is integrally formed by casting.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 are diagrams showing an embodiment of the present invention. In each of the drawings, 10 is a segment in which the circumferential direction is formed in an arc shape, 21 is both end faces 10a in the circumferential direction of the segment 10, An insert member embedded in 10b, 22 is a bolt fastening notch, 23 is a bolt insertion hole in which a sheath tube (not shown) into which a bolt 24 is inserted is fixed, and a segment 10 adjacent in the circumferential direction, When the bolts 10 are joined together, the bolts 24 are screwed into the insert member 21 from the bolt fastening notches 22 to fasten the segments 10 and 10 together.
Reference numeral 30 denotes a joint fitting disposed on the side face 10c of the segment 10 on the face side, and 40 denotes an insert fitting disposed on the side face 10d of the segment 10 on the side face 10d facing the joint fitting 30.
[0011]
The joint hardware 30 includes a plate-like bolt mounting portion 31 in which a bolt insertion hole 31 s opened on the side surface 10 c side on the face side of the segment 10 is formed, and a bolt 32 provided on the back side of the bolt mounting portion 31. A joint main body 34 in which a fastening space 33 for fastening is formed, and the center of the bolt insertion hole 31 s in parallel to the axial direction of the bolt insertion hole 31 s from the outer peripheral portion back side of the joint main body 34 A first anchor member 35 projecting so as to extend rearward of the joint body 34 along the line, and the segments 10 and 10 adjacent to each other in the axial direction of the tunnel in the center of the outer periphery of the joint body 34 And a second anchor member 36 that protrudes obliquely rearward with respect to the side surface 10c serving as a connection surface. In the present embodiment, when the joint hardware 30 is manufactured, the joint body 34 and the first and second anchor members 35 and 36 are integrally cast by ductile casting.
That is, in the joint hardware 30 of this example, the first and second anchor members 35 and 36 corresponding to the conventional anchor materials 61 and 62 protrude from the back side and the outer peripheral portion of the joint body 34 one by one. Because of this simple structure, the conventional technique can sufficiently cope with the casting production technique, which is advantageous in terms of cost. Further, the first anchor member 35 of the joint hardware 30 according to the present invention protrudes from the back side of the joint body 34 to the rear of the center line of the bolt insertion hole 31 s, and the second anchor member 36 is the outer periphery of the joint body 34. The first and second anchor members 35, 36 can be deeply fixed in the concrete of the segment 10 because the first and second anchor members 35, 36 are projected obliquely rearward from the portion. Therefore, even if the anchor members are combined into one, sufficient rigidity against the shearing force and tensile force acting on the joint hardware 30 can be secured, and the crack resistance against the shearing load can be improved.
[0012]
In addition, the insert hardware 40 has a hardware main body 42 provided with a cap screw 41 opened on the side surface 10d side of the segment 10 at the front end portion, and the center of the outer peripheral portion of the hardware main body 42 with respect to the side surface 10d. And an anchor member 43 that protrudes obliquely rearward. In this example, also with respect to the insert hardware 40, the hardware body 42 and the anchor member 43 are integrally cast by ductile casting. Also in the insert hardware 40 of this example, the rear end of the hardware main body 42 is extended inward of the segment 10 in parallel to the axial direction of the cap screw 41, and the anchor member 43 is the outer periphery of the hardware main body 42. Since it protrudes so that it may incline in the back diagonally from a part, the rigidity with respect to the shearing force and tensile force which act on the insert metal fitting 40 can fully be ensured.
When joining the segments 10 and 10 adjacent to each other in the tunnel axis direction, the bolt 32 is screwed and fixed to the bag screw 41 through the washer 37 from the fastening space portion 33 of the joint hardware 30. As a result, the segments 10 and 10 are fastened together.
[0013]
Thus, in the present embodiment, the joint hardware 30 disposed on the side surface 10c on the face side of the segment 10 is replaced with the plate-like bolt mounting portion 31 in which the bolt insertion hole 31s is formed, and the bolt mounting portion. A joint main body 34 provided with a fastening space 33 for fastening the bolt 32 provided on the back side of 31 and the axial direction of the bolt insertion hole 31 s from the back side of the outer periphery of the joint main body 34. The first anchor member 35 projecting in parallel and the center of the outer peripheral portion of the joint body 34 are obliquely rearward with respect to the side surface 10c serving as a connection surface of the segments 10 and 10 adjacent in the axial direction of the tunnel. An insert hardware 40, which is composed of a second anchor member 36 projecting so as to incline and is disposed on the side surface 10d on the wellhead side, is a hardware body 42 provided with a cap screw 41, and the hardware body 42. Outside The first and second anchor members 35 and 36 of the joint hardware 30 and the anchor member 43 of the insert hardware 40 are segmented. Since it can fix deeply in the concrete of No. 10, the rigidity with respect to the shearing force and the tensile force acting on the joint portion can be sufficiently secured, and the crack resistance against the shearing load can be improved. In addition, since the structures of the first and second anchor members 35 and 36 and the anchor member 43 are simple, a highly rigid joint metal 30 and insert metal 40 can be easily and inexpensively formed by casting. Can be manufactured.
In addition, since the joint body 34 of the joint hardware 30 and the first and second anchor members 35 and 36 and the hardware body 42 and the anchor member 43 of the insert hardware 40 are all integrally formed by casting. The retrofitting work of the anchor material can be omitted, and the working efficiency can be greatly improved.
[0014]
In addition, in the said embodiment, although the case where the adjacent segments 10 and 10 were couple | bonded using the joint metal fitting 30 and the insert metal fitting 40 was demonstrated, even if only the joint metal fitting 30 is used, adjacent segments 10 and 10 are mutually. Can be concluded. That is, as shown in FIGS. 3 (a) and 3 (b), the joint hardware 30 and 30 are opposed to each other so that their bolt insertion holes 31s and 31s communicate with each other, and a fastening space portion of one joint hardware 30 is provided. 33, the bolt 32 is passed through the bolt insertion holes 31s, 31s to the fastening space portion 33 of the other joint hardware 30, and then the nut 44 is screwed onto the bolt 32 in the fastening space portion 33. Adjacent segments 10 and 10 are fastened by entering and fixing.
Each of the fitting hardwares 30 and 30 includes the first and second anchor members 35 and 36, and the first and second anchor members 35 and 36 are deeply fixed in the concrete of the segment 10, respectively. Therefore, the crack resistance against the shear load can be improved.
Further, as shown in FIG. 4, the insert hardware 40 of this example is combined with a joint plate 65 having the same bolt hole 65 s as the conventional one, and from the fastening space portion 66 provided on the back side of the joint plate 65. The bolt 32 may be screwed to the bag screw 41 of the insert hardware 40 via the washer 37. Since the anchor member 43 of the insert hardware 40 can be deeply fixed in the concrete of the segment 10, it is possible to greatly improve the crack resistance against the shear load.
[0015]
Moreover, when the shearing force and tensile force which act on a joint part are comparatively small like the case where the segments 10 and 10 adjacent in the circumferential direction are fastened, it shows to Fig.5 (a), (b). As described above, instead of the fitting hardware 30, a fitting hardware 30 </ b> R in which the second anchor member 36 is omitted may be used. Further, as shown in FIG. 6A, a fitting hardware 30R in which the second anchor member 36 is omitted and an insert hardware 40R in which the anchor member 43 is omitted may be used, or as shown in FIG. The segments 10 and 10 may be fastened together by using two joint hardware 30R and 30R in which the two anchor members 36 are omitted. Or as shown in FIG.6 (c), you may combine the metal fitting 40R which abbreviate | omitted the anchor member 43, and the coupling board 65 which has the bolt hole 65s similar to the past. Thereby, a fitting metal piece and an insert metal piece can be manufactured more easily and cheaply.
Further, as shown in FIGS. 7 (a) and 7 (b), an insert hardware 40Z having a tip protruded from the side surface 10d on the well opening side of the segment 10 and the insert hardware 40Z on the opening side of the bolt insertion hole 31s. If the adjacent segments 10 and 10 are coupled using the joint hardware 30Z provided with the insert hardware insertion hole 38 for inserting the tip portion, the alignment between the joint hardware 30Z and the insert metal 40Z is ensured. It is possible to assemble the segments 10 and 10 easily and accurately. At this time, it is preferable to form the inner diameter of the bolt insertion hole 31 s smaller than the inner diameter of the insert metal insertion hole 38. As a result, the rigidity of the bolt mounting portion 31 can be secured, and a sufficient bearing area can be secured even if a small size washer 37 is used.
Moreover, if the taper part 40T with the narrow width | variety on the front end side is provided in the front end side of the said insert metal fitting 40Z, the alignment precision of the joint metal fitting 30Z and the insert metal fitting 40Z can be improved. Furthermore, if a tapered portion 38T for guiding the tapered portion 40T of the insert metal piece 40Z is provided in the opening of the insert metal piece insertion hole 38, the alignment accuracy between the joint metal piece 30Z and the insert metal piece 40Z is further increased. Can be improved.
[0016]
Moreover, although the said example demonstrated the case where the segments 10 and 10 adjacent to an axial direction were fastened, the joint metal 30 (or joint metal 30R, 30Z) and the insert metal 40 (or insert metal 40R) of this example were demonstrated. , 40Z) or two joint fittings 30 and 30 can be used to fasten the segments 10 and 10 adjacent to each other in the circumferential direction. As shown in b), when the segments 10 and 10 adjacent to each other in the axial direction are fastened, the joint metal 30Z and the insert metal 40Z or the two metal joints 30Z and 30Z are used in the circumferential direction. When the adjacent segments 10 and 10 are fastened, the above-mentioned fitting hardware 30R and the insert fitting 40R, or two fitting fittings 30R and 30R may be used. It is preferred.
Further, it goes without saying that even if the insert metal piece 40 and the joint plate 65 having the same bolt hole 65s as in the prior art are combined, the segments 10 and 10 adjacent not only in the axial direction but also in the circumferential direction can be combined. .
[0017]
【The invention's effect】
As described above, according to the present invention, the joint fitting for a segment that fastens adjacent segments is connected to the bolt mounting portion in which the bolt insertion hole that opens on the side surface of the segment is formed and the back side of the bolt insertion hole. Since the joint body having the provided fastening space portion and the anchor member protruding in parallel with the axial direction of the bolt insertion hole from the outer peripheral portion back side of the joint body are integrally formed by casting, A joint metal with high rigidity can be obtained easily and inexpensively.
Moreover, since the metal joint body and the anchor member are integrally formed by casting in the joint metal fitting for a segment of the present invention, the retrofitting work of the anchor material can be omitted, and the work efficiency can be greatly improved.
In addition, a second anchor member that is inclined obliquely rearward with respect to the connection surface of the segment is provided on the outer periphery of the joint body, and the joint body, the anchor member, and the second anchor member are cast. By integrally forming, a joint metal with higher rigidity can be obtained.
[Brief description of the drawings]
FIG. 1 is a diagram showing an embodiment of the present invention.
FIG. 2 is a diagram showing a joint structure of segments according to the present embodiment.
FIG. 3 is a view showing another example of the joint structure according to the present invention.
FIG. 4 is a view showing another example of the joint structure according to the present invention.
FIG. 5 is a view showing another configuration of the joint fitting for a segment according to the present invention.
FIG. 6 is a view showing another configuration of the joint fitting for a segment according to the present invention.
FIG. 7 is a view showing another configuration of the joint fitting for a segment according to the present invention.
FIG. 8 is a diagram showing an example of a method of joining segments using the joint fitting for a segment of the present invention.
FIG. 9 is a diagram illustrating a conventional segment connecting method.
FIG. 10 is a view showing a conventional joint structure.
[Explanation of symbols]
10 segments, 21 insert members, 22 bolt fastening notches, 23 bolt insertion holes, 24 bolts,
30 joint fitting, 31 bolt mounting portion, 31s bolt insertion hole, 32 bolt, 33 fastening space portion, 34 joint body, 35 first anchor member,
36 second anchor member, 37 washer, 38 insert hardware insertion hole,
40 insert hardware, 41 cap screw, 42 hardware body, 43 anchor member.

Claims (5)

A joint fitting for a segment for fastening adjacent segments to each other, a bolt mounting portion formed with a bolt insertion hole opened on a side surface of the segment, and a fastening space portion provided on the back side of the bolt insertion hole; A joint for a segment comprising: a joint body having a joint; and an anchor member projecting in parallel to the axial direction of the bolt insertion hole from the rear surface side of the outer periphery of the joint body. hardware. A second anchor member inclined obliquely rearward with respect to the connection surface of the segment is provided on the outer peripheral portion of the joint body, and the joint body, the anchor member, and the second anchor member are integrated by casting. The joint fitting for a segment according to claim 1, which is formed. Provided on the distal end side of the joint body is an insert hardware insertion hole for inserting the distal end portion of the insert hardware having a cap screw at the distal end, and the distal end portion of the insert hardware in the opening of the insert hardware insertion hole. The segment fitting according to claim 1 or 2, wherein a taper portion is provided for guiding the segment. The joint metal fitting for a segment according to claim 3, wherein an inner diameter of the bolt insertion hole is smaller than an inner diameter of the insert metal insertion hole. A joint fitting for a segment for fastening adjacent segments to each other, which is obliquely rearward with respect to the connection surface of the segment projecting on the outer peripheral side of the hardware main body having a cap screw at the front end. A joint fitting for a segment, wherein an extending anchor member is integrally formed by casting.

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