JP4344551B2 - Segment connector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention has a fitting space that is arranged at a connecting portion of a plurality of segments that are assembled adjacent to each other in the circumferential direction of the tunnel, and has a fitted space that fits into a fitting body inserted from the opening side. The present invention relates to a segment connector including a cylindrical body in which a slit through which a support body that supports union is inserted is formed along an axis of the fitting space.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as a segment connecting portion structure configured as described above, a female connector (5) provided on one of coupling surfaces (2a) facing in the circumferential direction of a segment (2) (fitting of the present invention) There is a connection structure (1) composed of a member) and a male connector (6) provided on the other of the connection surfaces (2a). In this connection structure (1), the anchor part (5a) of the female connector (5) is embedded in the segment (2), and the slit (9) and the fitting hole (4) (the fitted space of the present invention). The main body portion (5b) having a truncated conical cylindrical shape, which is formed on the connecting surface (2a), is exposed to the side of the connecting surface (2a), and the anchor portion (6a) of the male connector (6) is the segment (2). The main body (6b) having a truncated cone shape is exposed to the connection surface (2a) side. When connecting the segments (2), the male connector (6) with the connecting surfaces (2a) of both segments (2) in contact with each other by moving the segments (2) in the tunnel axis direction. ) Body portion (6b) is inserted into the fitting hole (4) of the body portion (5b) of the female connector (5) to reach a connected state (see, for example, Patent Document 1) Is quoted from the literature).
[0003]
[Patent Document 1]
Japanese Patent No. 3010011 Specification
[Problems to be solved by the invention]
The female connector described in Patent Document 1 is formed by forming a fitting hole in a cylindrical main body formed in a truncated cone shape and forming a slit that cuts the side of the main body. is there. Therefore, in a state where it is connected to the male connector, since the main body portion of the male connector is inserted into the fitting hole of the main body portion of the female connector, a strong force acts on the segment. When a strong force is applied in the direction of separating the main body parts or when a strong force is applied in the direction of twisting the shafts of the main body parts, the female connector expands the slit. Or the body part of the female connector may be destroyed.
[0005]
Therefore, it is conceivable to increase the thickness of the main body of the female connector, but the structure in which the side surface of the cylindrical member is opened with a slit is easily deformed in the direction of expanding the slit, and the strength is improved. However, there is room for improvement not only in increasing the size of the female connector but also in increasing the weight.
[0006]
An object of the present invention is to rationally configure a fitted member that firmly connects segments with high strength without increasing weight and size.
[0007]
[0008]
[0009]
[0010]
[0011]
[Means for Solving the Problems]
Features of coupling segments according to Claim 1 of the present invention, functions and effects are as follows.
〔Characteristic〕
It is arranged at a connecting portion of a plurality of segments that are assembled adjacent to each other in the circumferential direction of the tunnel, has a fitted space for fitting with a fitting body inserted from the opening side thereof, and supports the fitting body A connecting tool for a segment including a cylindrical body in which a slit through which a support body is inserted is formed along the axial center of the fitting space, with respect to a circumferential end of the segment made of concrete. A cylindrical body is fixed, and the axial center of the fitting space in the cylindrical body is set in a posture parallel to the tunnel axis direction, and the inner diameter on the opening side of the cylindrical body is opposite to the opening. is set larger than the inner diameter of the side in a cross section along the circumferential direction of the segment, the thickness of the member forming the tubular body, parts material surrounding the site of the opening, members surrounding the site opposite to the opening Set to be thinner than While in the cross section along the thickness direction of the segment, the thickness of the member forming the tubular body, parts material surrounding the site of the opening becomes larger than the thickness of the member surrounding the site opposite to the opening The bottom wall is formed at a position where the fitting space is closed on the opposite side of the opening in the cylindrical body, and the length of the slit is the same as the distance from the opening to the bottom wall Alternatively, the shape is set to be shorter than the distance from the opening to the bottom wall.
[0012]
[Action / Effect]
According to the above feature, in the cross section along the thickness direction of the segment, the thickness of the member surrounding the opening portion of the cylindrical body constituting the fitted body is set to be thicker than the thickness surrounding the portion on the opposite side of the opening, Since the bottom wall is formed on the opposite side of the opening of the cylindrical body, even when a force acts in the direction of expanding the slit from the fitting body inserted into the fitting space of this cylindrical body, The thick member prevents deformation and destruction, and on the side opposite to the opening, the bottom wall prevents deformation and destruction. In other words, the slits are formed at both ends of the cylindrical body without adopting a shape in which the thickness of the entire cylindrical body is increased by setting the thickness of the cylindrical body constituting the fitted member and forming the bottom wall. It can be made to withstand strong forces in the direction of expansion. Further, since the axis of the cylindrical body of the member to be fitted is set in a posture parallel to the tunnel axis, for example, the fitting body that fits into the fitting space of this cylindrical body is arranged in the circumferential direction of the other segment. In the case of forming at the end of the segment, the segments can be connected by simply moving the segments relative to each other along the tunnel axis. In addition, in the case where the members to be fitted are arranged at the ends of the two segments facing each other in the circumferential direction, the fittings are fitted to both ends of the support body to which the tubular body of each of the members to be fitted is fitted. The segments can be connected to each other in a so-called cotter type in which a fitting member provided with a combined body is inserted into each fitted member. As a result, a member to be fitted that maintains a strong connected state without causing an increase in the slit even when a strong force acts in the direction in which the slit is enlarged without causing an increase in size and weight is formed. In addition, the segments can be easily connected to each other only by setting the shaft core.
Further, the features, functions and effects of the segment connector according to claim 2 of the present invention are as follows.
〔Characteristic〕
The segment connector according to claim 1, wherein the cylindrical body is formed in a shape having a rib-like portion formed by thickening a belt-like portion surrounding the opening.
[Action / Effect]
According to the above feature, since the rib-like portion having the increased thickness of the belt-like portion surrounding the opening portion of the cylindrical body is formed, the deformation and breakage of the opening portion are further suppressed. That is, in the tubular body having a bottom wall opposite to the opening as in the present invention, a force is likely to act in the direction of enlarging the slit on the opening side, but a rib-like portion is formed. Thus, the opening is shaped more strongly to prevent the slit from expanding. As a result, a member to be fitted that maintains the connected state more firmly with only a slight improvement was constructed.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a first embodiment of the invention will be described with reference to the drawings.
As shown in FIG. 1, a tunnel ring TR disposed on the inner periphery of a tunnel is formed by assembling a plurality of concrete segments S adjacent to each other in the circumferential direction. Each segment S is connected without a bolt by connecting means arranged at an end in the circumferential direction.
[0014]
As shown in FIGS. 1 to 6, the connecting means includes an iron fitting member M fixed to one of the surfaces facing the segment S in the circumferential direction, and a surface facing the segment S in the circumferential direction. It is comprised with the to-be-fitted member F made of iron fixed to the other. This connecting means sets the fitting body axis X of the fitting member M and the cylindrical body axis Y of the fitted member F in a posture parallel to the tunnel axis Z, and the adjacent segment S is tunneled. It has a function of connecting the segments S by being relatively moved along the axis Z.
[0015]
(Fitting member)
The fitting member M is larger in diameter than the thickness of the support 2 with respect to the tip of the plate-like support 2 integrally formed with the anchor member 1, and is in a posture along the plate width direction of the support 2 The rod-shaped fitting body 3 having the shaft core X (the fitting body axis X) is integrally formed. The fitting body axis X is set at a position parallel to the plate width direction of the support body 2 and passing through a substantially central position of the fitting body 3.
[0016]
The fitting body 3 is formed into a shape approximating a frustoconical shape in which the front end side in the insertion direction is smaller in diameter than the rear end side, and is cut by a virtual plane in a posture orthogonal to the fitting body axis X. The cross section at any location is shaped to have the shape shown in FIG. That is, in this fitting body 3, a plane At that is perpendicular to the extending direction of the support body 2 is formed on the opposite side (opposite side) of the support body 2, and a pair of arcs is formed in the region sandwiching the plane At. The first fitting portion A1 is formed, and the outer end portion of the first fitting portion A1 is formed with a plane As in a posture parallel to the extending direction of the support body 2, and further on the support body 2 side. A second fitting portion A2 located in a region sandwiching the support 2 is formed.
[0017]
The first fitting portion A1 is formed as a smooth surface having a radius R1 in a region a1 located on the opposite side of the support body 2 from the substantially central portion of the fitting body 3, and the second fitting portion A2 is In the arc-shaped region a2 on the side where the support body 2 is located, a smooth surface having a radius R2 centered on the outside of the fitting body 3 is formed. The cross-sectional shape is set so that the radius R2 of the second fitting portion A2 is larger than the radius R1 of the first fitting portion A1. Further, the fitting body axis X is set so as to pass through a substantially central position of the section of the fitting body 3 and to be in a posture along the longitudinal direction of the fitting body 3. In addition, you may set the said fitting body 3 to the perfect circle in the cross-sectional shape.
[0018]
Further, the anchor member 1 is formed with a female thread portion 4 into which the anchor reinforcement Re is screwed, and the anchor member 1 and the anchor reinforcement Re threadedly connected to the female screw portion 4 are embedded in the concrete of the segment S. ing.
[0019]
[Fitted member]
The fitted member F is formed by integrally forming an anchor member 11 and a bottomed tubular body 12, and the tubular body 12 has a fitted space V into which the fitted body 3 is fitted. And the slit 13 of the attitude | position along the longitudinal direction of this to-be-fitted space V and the bottom wall 14 are provided. The cylindrical body axis Y is set at a position passing through the center of the cylindrical body 12 (the center of the fitted space V) in a posture parallel to the longitudinal direction of the cylindrical body 12.
[0020]
The to-be-fitted space V is formed in an inner surface shape in which the opening diameter (inner diameter) on the upper side (opening side) in the insertion direction of the fitting body 3 is larger than the opening diameter (inner diameter) on the lower side. As shown in FIG. 6B, the thickness T1 of the cylindrical body 12 on the opening side is set larger than the thickness T2 of the cylindrical body 12 on the bottom wall side. Further, as shown in FIG. 2, the length L of the slit 13 is set equal to the distance from the opening to the inner surface position of the bottom wall 14, and a circular hole 14A is formed at the center of the bottom wall 14. Is forming. The length L of the slit 13 may be set to a length shorter than the position of the inner surface of the bottom wall 14 from the opening, and may be formed in a shape that does not form the hole portion 14A with respect to the bottom wall 14.
[0021]
As shown in FIG. 8, in the cross section of the cylindrical body 12 when the cylindrical body 12 is cut in a virtual plane orthogonal to the cylindrical body axis Y, the side opposite to the slit 13 (opposite side). The cross-sectional shape is set so that the radius r2 of the second inner peripheral part B2 located in the region sandwiching the slit 13 on the slit 13 side is larger than the radius r1 of the first inner peripheral part B1 located at I'm.
[0022]
That is, the first inner peripheral portion B1 is formed as a smooth surface having a radius r1 in a semicircular (arc-shaped) region b1 positioned on the opposite side of the slit 13 with the substantially central portion of the fitted space V as a center. Has been. The second inner peripheral portion B2 is formed as a smooth surface having a radius r2 centered on the outside of the fitted space V in the arc-shaped region b2 on the side where the slit 13 is located. The value of the radius r2 is set larger than the radius r1. It is assumed that the cylindrical body axis Y passes through a substantially central position of the opening space of the cylindrical body 12 and assumes a posture along the longitudinal direction of the cylindrical body 12.
[0023]
The anchor member 11 is formed with a female screw portion 15 into which the anchor reinforcement Re is screwed, and the anchor member 11 and the anchor reinforcement Re screwed into the female screw portion 15 are embedded in the concrete of the segment.
[0024]
Further, in the state where the fitting body 3 is fitted to the cylindrical body 12, as shown in FIGS. 7 to 9, the radius of the first fitting portion A1 at the close portion is maintained so as to maintain a good fitting state. The value of R1 is matched with the value of the radius r1 of the first inner peripheral part B1, and the value of the radius R2 of the second fitting part A2 is matched with the value of the radius r2 of the second inner peripheral part B2. I am letting.
[0025]
[Operation for connection]
Each of the coupling surfaces of the segments S is arranged on the coupling surface of the segment S so that the fitting member M and the fitted member F are fitted to each other in a state where the coupling surfaces of the segments S are in close contact with each other. Then, when connecting the segments, as shown in FIG. 2, the fitting body axis X and the cylindrical body axis Y are arranged in the same axis and are moved relative to each other in the fitting direction. Thus, as shown in FIGS. 3, 4, and 9, the fitting body 3 is fitted into the fitting space V of the cylindrical body 12, and each of them reaches a close state and the connection is completed.
[0026]
Even when connecting in this way or after connecting, even if the segments are displaced in the bending direction at the axis parallel to the tunnel axis Z due to manufacturing errors of the segment S, etc. Since the fitting body 3 can be slightly rotated inside the fitting space V of the shaped body 12, the posture of the segments is allowed to change without applying an excessive force, and the segments are separated from each other. When a strong force is applied in the direction, the second fitting portion A2 of the fitting body 3 and the second inner peripheral portion B2 of the tubular body 12 are in pressure contact with each other. The component force in the direction of enlarging the slit 13 of the body 12 is small, the slit 13 is not enlarged, and a strong connected state is maintained without causing deformation or destruction.
[0027]
In particular, since the fitting space V is formed so that the first inner circumferential portion B1 and the second inner circumferential portion B2 of the fitting space V of the cylindrical body 12 are smoothly connected, the fitting body 3 is formed. Even if a large force acts between the tube 12 and the cylindrical body 12, and a large stress may act on the tubular body 12, the phenomenon that the stress is concentrated on a specific part is avoided and the tubular body 12 is avoided. It is to prevent the destruction of. Furthermore, the bottom wall 14 is formed with respect to the cylindrical body 12, and the thickness T1 on the opening side of the cylindrical body 12 is made thicker than the thickness T2 on the bottom wall 14 side. Even when a strong force acts in the direction of expanding the slit 13 from the fitting body 3 without increasing the size and weight, the deformation and destruction of the cylindrical body 12 are prevented. Yes.
[0028]
[Second Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings (this second embodiment has the same function as that of the first embodiment, and is the same as that of the first embodiment. Number and sign).
[0029]
As shown in FIGS. 10 to 12, the connecting means includes an iron fitted member F fixed to each of the circumferentially opposed surfaces of the plurality of segments S, and a pair of fitted members F. And a steel fitting member M that connects the segments S to each other to form a cotter type. This connecting means sets the fitting body axis X of the fitting member M and the cylindrical axis Y of the fitting member F in a posture parallel to the tunnel axis Z, and the fitting body 3 of the fitting member M. Is inserted into the cylindrical body 12 and functions to connect the segments S.
[0030]
(Fitting member)
The fitting member M has a diameter X larger than the thickness of the support 2 with respect to both ends of the plate-like support 2 and an axial core X (fit) along the plate width direction of the support 2. A rod-shaped fitting body 3 having a combined shaft core X) is integrally formed. The fitting body axis X is set at a position parallel to the plate width direction of the support body 2 and passing through a substantially central position of the fitting body 3.
[0031]
The fitting body 3 is formed in a shape that approximates a frustoconical shape in which the front end side in the insertion direction is smaller in diameter than the rear end side. Also in the second embodiment, the cross-sectional shape of the fitting body 3 is set in the same manner as described in the first embodiment, and the position of the shaft core X is set at a substantially central position. In addition, you may set the said fitting body 3 to the perfect circle in the cross-sectional shape.
[0032]
Further, the anchor member 1 is formed with a female thread portion 4 into which the anchor reinforcement Re is screwed, and the anchor member 1 and the anchor reinforcement Re threadedly connected to the female screw portion 4 are embedded in the concrete of the segment S. ing.
[0033]
[Fitted member]
The fitted member F has basically the same structure as that described in the first embodiment.
[0034]
[Operation for connection]
The tubular body 12 of the fitted member F is set in a relative positional relationship so that a gap is formed between the slits in a state where the connecting surfaces of the segments S are in contact with each other. When connecting the segments, as shown by phantom lines in FIG. 10, the fitting body axis X and the cylindrical body axis Y are arranged in the same axis, and the fitting member M is fitted to the fitting member. By moving to the F side, the fitting body 3 is fitted and connected in a state shown by a solid line in FIG. 10 and in a state where the fitting body 3 is in close contact with the fitting space V of the cylindrical body 12 as shown in FIG. Complete.
[0035]
Even when connecting in this way or after connecting, even if the segments are displaced in the bending direction by the axis parallel to the tunnel axis Z due to the manufacturing error of the segment S, etc. In addition, since the fitting body 3 can be slightly rotated inside the fitting space V of the cylindrical body 12, the posture displacement between the segments is allowed without applying an excessive force, and the segments are When a strong force is applied in the direction of separating the two, the second fitting portion A2 of the fitting body 3 and the second inner peripheral portion B2 of the cylindrical body 12 are in pressure contact with each other. The component force in the direction of enlarging the slit 13 of the cylindrical body 12 is small, the slit 13 is not enlarged, and a strong connected state is maintained without causing deformation or destruction.
[0036]
Moreover, since the to-be-fitted space V is formed so that the first inner peripheral part B1 and the second inner peripheral part B2 of the to-be-fitted space V of the cylindrical body 12 are smoothly connected, the fitting body 3 is formed. Even if a large force acts between the tube 12 and the cylindrical body 12, and a large stress may act on the tubular body 12, the phenomenon that the stress is concentrated on a specific part is avoided and the tubular body 12 is avoided. It is to prevent the destruction of. Furthermore, the bottom wall 14 is formed with respect to the cylindrical body 12, and the thickness T1 on the opening side of the cylindrical body 12 is made thicker than the thickness T2 on the bottom wall 14 side. Even when a strong force acts in the direction of expanding the slit 13 from the fitting body 3 without increasing the size and weight, the deformation and destruction of the cylindrical body 12 are prevented. Yes.
[0037]
[Another embodiment]
In addition to the first and second embodiments, the present invention can be configured, for example, as follows (in this another embodiment, the one having the same function as that of the first embodiment Numbers and symbols common to the first embodiment are attached).
[0038]
(A) As shown in FIGS. 13 and 14, the tubular body 12 of the fitted member F is formed into a shape having a rib-like portion 12 </ b> A in which the thickness of the belt-like portion surrounding the opening is formed thick. By forming the rib-like portion 12A in the portion surrounding the opening in this way, the strength on the opening side is increased, and even when a strong force acts in the direction of enlarging the slit 13, the slit 13 is enlarged particularly in the opening portion. It is possible to further suppress deformation and breakage in the direction and to show a strong connection state.
[0039]
(B) As shown in FIGS. 15 and 16, in addition to the configuration of the above-described another embodiment (A), the cylindrical body 12 is formed from the rib-shaped portion 12 </ b> A toward the bottom wall 14. A plurality of reinforcing ribs 12B are integrally formed in a posture along the axis Y with respect to the outer wall. By forming the reinforcing ribs 12B in this way, the strength of the tubular body 12 is increased without increasing the thickness of the tubular body 12, and the entire deformation and destruction of the tubular body 12 including the opening portion are further improved. Suppress and show a strong connection.
[0040]
(C) In place of the segment made of concrete, the connecting portion structure of the present invention may be used for a segment made of steel plate or cast iron.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a plurality of segments constituting a tunnel ring according to a first embodiment. FIG. 2 is a sectional view showing a fitting member and a fitted member in a separated state according to the first embodiment. FIG. 3 is a longitudinal sectional view showing a fitting member and a fitted member in a fitted state according to the first embodiment. FIG. 4 is a fitted member and a fitted state in a fitted state according to the first embodiment. FIG. 5 is a perspective view showing a fitting member and a fitted member in a separated state according to the first embodiment. FIG. 6 is a perspective view of the tubular body according to the first embodiment. FIG. 7 is a side view showing the shape of the slit and a cross-sectional view showing the cross-sectional shape of the cylindrical body. FIG. 7 is a diagram showing the shape of the fitting body according to the first embodiment. The figure which shows the shape of the to-be-fitted space of FIG. 9 The figure which shows the cylindrical body and fitting body of the fitting state of 1st Embodiment. FIG. 10 is the fitting state of 2nd Embodiment. Mating FIG. 11 is a longitudinal sectional view showing a member and a fitted member. FIG. 11 is a transverse sectional view showing a fitted member and a fitted member in a fitted state according to the second embodiment. The perspective view which shows the fitting member and to-be-fitted member of the separation state of a form [FIG. 13] The perspective view of the to-be-fitted member of another embodiment (A) [FIG. 14] The tow of another embodiment (A) FIG. 15 is a perspective view of a member to be fitted according to another embodiment (b). FIG. 16 is a sectional view of a member to be fitted according to another embodiment (b).
2 Support body 3 Fitting body 12 Tubular body 12A Rib-shaped part 13 Slit 14 Bottom wall T1, T2 Thickness S Segment V Fit space Y Axis Z Tunnel Axis

Claims (2)

It is arranged at a connecting portion of a plurality of segments that are assembled adjacent to each other in the circumferential direction of the tunnel, has a fitted space for fitting with a fitting body inserted from the opening side thereof, and supports the fitting body A connecting tool for a segment including a cylindrical body formed with a slit through which the support body is inserted along the axial center of the fitted space,
While fixing the cylindrical body to the circumferential end of the segment made of concrete, set the axis of the mating space in the cylindrical body in a posture parallel to the tunnel axis direction,
The inner diameter of the cylindrical body on the opening side is set to be larger than the inner diameter on the opposite side of the opening, and the thickness of the member forming the cylindrical body in the cross section along the circumferential direction of the segment part material surrounding is thereby set to be thinner than the thickness of the member surrounding the site opposite the opening in the cross section along the thickness direction of the segment, the thickness of the member forming the cylindrical body, the opening part material surrounding the site, and set to be thicker than the thickness of the member surrounding the site opposite to the opening,
Forming a bottom wall at a position closing the fitted space on the opposite side of the opening in the cylindrical body, and the length of the slit is the same as the distance from the opening to the bottom wall, or A segment connector formed in a shape set shorter than the distance from the opening to the bottom wall. The segment connector according to claim 1 , wherein the cylindrical body is formed in a shape having a rib-like portion in which a thickness of a belt-like portion surrounding the opening is formed thick.

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