JPH0913882A - segment - Google Patents

Abstract

(57) [Summary] [Purpose] To simplify the work of joining the segments and shorten the construction period. [Structure] Joint surface 1 inclined with respect to the axial direction of the drill hole
a has a contact surface orthogonal to the axis of the drill hole, and the contact projection 5 of the male segment 1 provided with the contact projection 5 having the protrusion 6 formed on the contact surface is the axis of the drill hole. Of the female segment 2 in which the joint surface 2a inclined with respect to the direction has a contact surface orthogonal to the axis of the excavation hole, and the joint recess 8 having the fitting hole 9 formed in the contact surface is provided. The projection 6 and the fitting hole 9 are fitted to each other by fitting the fitting recess 8 and the male segment 1 and the female segment 2 by the engaging force.
And are joined in the circumferential direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a segment which constitutes a cylindrical wall body in the axial direction of an excavation hole by connecting a plurality of them to each other.

[0002]

2. Description of the Related Art As a method for constructing a tunnel, a so-called shield construction method is generally used in which segments (mainly made of concrete or steel) are assembled on the inner surface side of an excavation hole to construct a tubular wall body. As the segments used in this shield construction method, those having a rectangular shape in a plan view and an arc plate shape are mainly used, and these segments are joined together by bolts. As a structure for joining the segments with each other with this bolt, a joint having holes communicating with each other when the joining faces of the segments are brought into contact with each other is embedded in the vicinity of the joining faces of the segments, A structure is generally used in which a bolt is inserted into a hole portion and a nut is fastened to the bolt in a state where the joint surfaces of the segments are in contact with each other so that the portions communicate with each other. Further, there is also a structure in which an insert fitting as a nut member is embedded in each segment, and bolts penetrating adjacent segments are fastened to each other for joining.

[0003]

However, in the above structure, the bolt is inserted into the hole formed in the joint surface of the joint at the construction site, and the nut is fastened to the bolt or embedded in the mutual segments. Since the extremely complicated work of fastening the bolt to the insert metal fitting is required, there is a limit in shortening the assembly time, and it is difficult to adapt to automatic assembly by a robot. Moreover,
Even if the secondary lining is omitted, the bolt box formed in the segment must be closed in order to install the bolts and nuts, and a new joint structure can be used to speed up construction and save labor. The current situation is that development is an urgent task.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a segment which can be joined to each other extremely easily and reliably.

[0005]

In order to achieve the above object, a segment according to claim 1 is a segment which is joined in a state where the joining surfaces of the segments are aligned with each other to form a tunnel wall body, The joining surfaces to be joined to each other in the circumferential direction are inclined with respect to the axial direction of the excavation hole, one of the joining surfaces is provided with a joining projection, and the other is provided with a joining recess into which the joining projection can be fitted. The joint projection and the joint recess have contact surfaces that are in contact with each other and are orthogonal to the axial direction of the excavation hole, and these contact surfaces are formed with protrusions and fitting holes that fit with each other. It is characterized by being done.

According to a second aspect of the invention, in the segment according to the first aspect, the joint protrusion and the joint recess are provided with an abutting plate having the protrusion and the hole. I am trying. The segment according to claim 3 is the segment according to claim 2, wherein skin plates are provided on the front and back sides, and a reinforcing steel material is provided between the skin plates, and the abutting plate is provided on these reinforcing steel materials. It is characterized by being fixed. According to a fourth aspect of the invention, in the segment according to the first aspect, skin plates are provided on the front and back sides, and a reinforcing steel material is provided between the skin plates. The reinforcing steel material includes the protrusion and the It is characterized in that a fitting hole is provided.

[0007]

According to the first aspect of the invention, when the joining surfaces are brought into contact with each other while the joining projection is fitted into the joining recess, the abutting surfaces of the joining projection and the joining recess fit with the projection. The holes are brought into contact with each other in a fitted state and the segments are joined together. According to the segment of claim 2,
When the joining surfaces are brought into contact with each other while the joining projection is fitted into the joining recess, the joining plates of the joining projection and the joining recess are brought into contact with each other in a state where the protruding portion and the fitting hole are fitted together. The segments are joined together. According to the segment of the third aspect, the strength of the segment is improved by the skin plates provided on the front and back sides and the reinforcing steel material provided between the skin plates. According to the segment of the fourth aspect, the strength of the segment is improved by the skin plates provided on the front and back sides and the reinforcing steel material provided between the skin plates. Moreover, since the protrusion and the fitting hole are directly formed in the reinforcing steel material, the structure can be simplified.

[0008]

EXAMPLES Examples of the segment of the present invention are shown in FIGS.
This will be described with reference to FIG. In the figure, reference numeral 1 is a male segment, and reference numeral 2 is a female segment. Each of the male segment 1 and the female segment 2 is formed in a trapezoidal shape in a plan view, and has joining surfaces 1a, 2a in the circumferential direction.
Are each formed of an arc plate inclined with respect to the axial direction of the excavation hole, and are joined to each other in the circumferential direction to construct a ring that constitutes the tubular wall body. Further, the male segment 1 and the female segment 2 are high-strength synthetic segments in which the space K between the skin plates 3 made of a metal plate is concrete K, and the skin plates 3 are arranged inside each other. A shear reinforcing steel material 4 fixed by welding or the like is disposed on the.

The male segment 1 is provided with joining projections 5 on the joining surface 1a in the circumferential direction thereof, one pair each in the thickness direction and at intervals in the width direction. These joint protrusions 5 are
The projecting end of the shear-reinforced steel material 4, the concrete K projected together with this end, and the state of being laminated in the vicinity of the end of the shear-reinforced steel material 4, for example, by fastening or welding with bolts and nuts, etc. It is composed of a joint plate (contact plate) 7 having a fixed protrusion 6. Further, the female segment 2 is provided with a pair of joint recesses 8 in the circumferential direction on which the joint projections 5 of the male segment 1 can be fitted, and a pair of joint recesses 8 in the thickness direction and in the width direction. Is formed. The joint recess 8 is provided with a receiving plate (fixing plate) 10 having a fitting hole 9 into which the protrusion 6 can be fitted, and the shear reinforcing steel member 4 is provided with, for example, a bolt. It is fixed by fastening with nuts or welding.

By fitting the joint projection 5 of the male segment 1 into the joint recess 8 of the female segment 2, the projection 6 fits into the fitting hole 9 and the joint plate 7 and the receiving plate are received. The contact surfaces formed by the surfaces of the plates 10 are in contact with each other. The contact surfaces formed by the surfaces of the joint plate 7 and the receiving plate 10 are surfaces orthogonal to the axis of the drill hole.

When constructing a ring forming a tubular wall body using the male segment 1 and the female segment 2, if the number of divisions in the circumferential direction is an even number, each of them has a trapezoidal shape in plan view. Male segment 1 and female segment 2 are joined alternately. When the number of divisions in the circumferential direction is odd, the joint protrusion 5 provided on the male segment 1 is provided on one end side, and the joint recess 8 provided on the female segment 2 is provided on the other end side. Join using quadrilateral segments.

As described above, the segments 1 and 2 having the above structure
According to the above, by simply fitting the joining surface 1a of the male segment 1 and the joining surface 2a of the female segment 2 into the joining recess 5 of the female segment 2, the joining projection 5 of the male segment 1 can be extremely easily fitted. Then, the protrusion 6 formed on the joining protrusion 5 is fitted into the fitting hole 9 formed in the receiving plate 10 to connect the male segment 1 and the female segment 2 in the circumferential direction to form a ring. Can be built. That is, compared with the conventional fastening structure using bolts and nuts or the fastening structure that fastens bolts to the insert fitting, the labor required for the joining work can be significantly reduced and the automatic assembly by the robot can be facilitated. Further, since there is no bolt box or the like, the work of closing the bolt box can be omitted.

In the above embodiment, the joint plate 7 having the protruding portion 6 and the receiving plate 10 having the fitting hole 9 into which the protruding portion 6 fits are attached to the shear reinforcing steel material 4, respectively. The projection 6 and the fitting hole 9 may be directly provided in the shear reinforcing steel material 4 without using the 7 and the receiving plate 10.
Further, the formation positions, shapes, etc. of the joint protrusions 5 and the joint recesses 8 are not limited to the above.

6 to 9, one joint projection 5 of the male segment 1 and one joint recess 8 of the female segment 2 are provided close to one side of the segments 1 and 2, respectively. The one shown in FIGS. 10 to 13 is
The bonding protrusions 5 and the bonding recesses 8 are provided one by one in the thickness direction. In addition, in the structure shown in FIG. 14, a joint protrusion (not shown) and a joint recess 8 are provided at the center in the thickness direction, and a protrusion (not shown) and a fitting hole 9 that are long in the thickness direction are provided. It is a thing. Further, in the above-mentioned embodiment, the skin segment 3 is provided on the front and back sides, and the synthetic segment in which the space between the skin plates 3 is the concrete K has been described. However, as shown in FIGS. Of course, it can be adapted. In addition, reference numeral 11 in FIGS. 15 to 18 is an anchor streak that firmly integrates the joint plate 7 and the receiving plate 10 into the segments 1 and 2.

[0015]

As described above, according to the segment of the present invention, the following effects can be obtained. According to the segment of the first aspect, by simply fitting the joining protrusion into the joining recess, the abutting surfaces of the joining protrusion and the joining recess are brought into contact with each other to fit the protrusion with the fitting hole. The segments can be joined very easily by the locking force between the protrusion and the fitting hole. That is, compared with the conventional fastening structure using bolts and nuts or the fastening structure that fastens bolts to the insert fitting, the labor required for the joining work can be significantly reduced and the automatic assembly by the robot can be facilitated. Further, since there is no bolt box or the like, the work of closing the bolt box can be omitted.

According to the second aspect of the present invention, the respective segments can be reliably joined by the engaging force between the projection of the contact plate of each segment and the fitting hole. According to the segment described in claim 3, the skin plate and the reinforcing steel material provided between the skin plates greatly improve the strength, and the protrusion and the fitting hole provided on the reinforcing steel material are mutually Since they are fitted and joined together, a more reliable joined state can be secured. According to the segment of the fourth aspect, since the reinforcing steel material provided between the skin plates is directly provided with the projection and the fitting hole to simplify the structure, the cost can be reduced. .

[Brief description of the drawings]

FIG. 1 is a plan sectional view of a part of a segment for explaining the configuration and structure of the segment according to an embodiment of the present invention.

FIG. 2 is a perspective view of a male segment that constitutes a segment according to an embodiment of the present invention.

FIG. 3 is a front view of a male segment that constitutes the segment of the embodiment of the present invention.

FIG. 4 is a perspective view of a female segment that constitutes a segment according to an embodiment of the present invention.

FIG. 5 is a front view of a female segment that constitutes a segment according to an embodiment of the present invention.

FIG. 6 is a plan view of a male segment that constitutes a segment of another embodiment of the present invention.

FIG. 7 is a front view of a male segment that constitutes a segment of another embodiment of the present invention.

FIG. 8 is a plan view of a female segment that constitutes a segment of another embodiment of the present invention.

FIG. 9 is a front view of a female segment that constitutes a segment of another embodiment of the present invention.

FIG. 10 is a perspective view of a male segment that constitutes a segment of another embodiment of the present invention.

FIG. 11 is a front view of a male segment that constitutes a segment of another embodiment of the present invention.

FIG. 12 is a perspective view of a female segment that constitutes a segment of another embodiment of the present invention.

FIG. 13 is a front view of a female segment that constitutes a segment of another embodiment of the present invention.

FIG. 14 is a perspective view of a female segment for explaining a segment according to another embodiment of the present invention.

FIG. 15 is a plan view of a male segment that constitutes a segment of another embodiment of the present invention.

FIG. 16 is a front view of a male segment that constitutes a segment of another embodiment of the present invention.

FIG. 17 is a plan view of a female segment that constitutes a segment of another embodiment of the present invention.

FIG. 18 is a front view of a female segment that constitutes a segment of another embodiment of the present invention.

[Explanation of symbols]

 1 Male Segment (Segment) 1a, 2a Joint Surface 2 Female Segment (Segment) 3 Skin Plate 4 Shear Reinforced Steel Material (Reinforced Steel Material) 5 Joint Protrusion 6 Protrusion 7 Joint Plate (Abutting Plate) 8 Joint Recess 9 Fitting Hole 10 Support plate (contact plate)

Claims (4)

[Claims] 1. A segment that constitutes a tunnel wall body by being joined together with their joining surfaces aligned with each other, and the joining surfaces that are joined in the circumferential direction are inclined with respect to the axial direction of the drill hole. The joining projection is provided on one of the joining surfaces, and the joining recess into which the joining projection can be fitted is formed on the other of the joining surfaces. The joining projection and the joining recess are in contact with each other and the shaft of the drill hole is formed. A segment having contact surfaces orthogonal to the direction, in which projections and fitting holes that fit with each other are formed. 2. The segment according to claim 1, wherein the joint protrusion and the joint recess are provided with an abutment plate on which the protrusion and the fitting hole are formed. 3. A skin plate is provided on the front and back sides, a reinforcing steel material is provided between the skin plates, and the abutting plate is fixed to the reinforcing steel material. The segment described in 2. 4. A skin plate is provided on the front and back sides, and a reinforcing steel material is provided between the skin plates, and the reinforcing steel material is provided with the protrusion and the hole. The segment according to claim 1, wherein