JP5155613B2 - Segment connector - Google Patents

Description

  The present invention relates to an insertion that is fixed to the joint surface side of one segment so that the tunnel segments adjacent to each other in the circumferential direction of the tunnel are connected to each other by abutting the joint surfaces formed at the end portions of the tunnel circumferential direction. A metal fitting and a metal fitting to be inserted fixed to the joint surface side of the other segment, the insertion metal fitting being insertable into the metal fitting to be inserted from the tunnel longitudinal direction, and a fixing member fixed to the segment And a connecting member that integrally connects the insertion member and the fixing member, the connecting member having a dimension in a segment thickness direction smaller than that of the inserting member, Provided at a position sandwiched between a fixing member, the metal fitting to be inserted includes a member to be inserted in which an insertion hole into which the insertion member can be inserted from the tunnel longitudinal direction is formed; The inserted member includes a slit that allows the connecting member to be inserted when the inserting member is inserted into the inserting hole, and the inserting member inserted into the inserting hole and the inserted member are connected to each other in the radial direction of the inserting hole. The present invention relates to a segment connecting device that is configured to be connected to connect the segments.

The segment connecting device fixes the insertion fitting and the insertion fitting to the segment so as to be in a predetermined posture with respect to the joint surface. Insertion is allowed and the joint surfaces are brought into contact with each other so that they can be connected to each other.
In the conventional segment connecting device, the slit is substantially constant along the radial direction of the insertion hole so that the mounting error of the insertion bracket or the insertion bracket can be absorbed within a certain range. It is formed with a slit width, and within the range of this substantially constant slit width, the posture change along the circumferential direction of the insertion hole with respect to the slit of the connecting member is allowed (see, for example, Patent Document 1). Even when the insertion bracket is fixed to the segment by changing the predetermined posture with respect to the joint surface as necessary, the insertion of the coupling member into the slit when the insertion member is inserted into the insertion hole is not permitted.

JP 2005-16235 A

For this reason, when the insertion bracket or the insertion bracket is to be fixed to the segment by changing the predetermined posture with respect to the joint surface, the connecting member is slit in the changed predetermined posture as the insertion member is inserted into the insertion hole. Therefore, it is necessary to separately manufacture an insertion fitting or a fitting to be inserted so that the manufacturing cost of the segment connecting device increases.
In order to solve this drawback, for example, a slit in a conventional insertion fitting is formed with a substantially constant large slit width along the radial direction of the insertion hole, and the insertion fitting or the insertion fitting is not manufactured separately. It is conceivable to allow a large change in posture along the circumferential direction of the insertion hole of the connecting member, but if the slit is formed with a substantially constant large slit width along the radial direction of the insertion hole, There are drawbacks that the allowance for engagement with the member is likely to be reduced (the catch is likely to be shallow) and the strength of the inserted member is likely to be reduced.
The present invention has been made in view of the above circumstances, and even when the insertion fitting or the fitting to be inserted is fixed to the segment by changing the predetermined posture with respect to the joint surface as necessary, the manufacturing cost of the segment coupling device is increased. The insertion member can be allowed to pass through the slit as the insertion member is inserted into the insertion hole, and the engagement margin between the insertion member and the member to be inserted is hardly reduced (hooked). It is an object of the present invention to provide a segment connecting device in which the strength of a member to be inserted is not easily lowered.

FEATURES configuration of the present invention, a segment tunnel adjacent tunnel circumferential direction, in order to connect to each other against the joint surface each other formed on the tunnel circumferential ends of each segment, the joint surface of one segment An insertion member that is fixed to the joint surface side of the other segment, and the insertion member is inserted into the insertion member from the tunnel longitudinal direction, and fixed to the segment. And a connecting member that integrally connects the insertion member and the fixing member, wherein the connecting member has a dimension in a segment thickness direction smaller than that of the insertion member, and Inserted portion provided at a position sandwiched between the insert member and the fixing member, and the insert fitting has an insert hole into which the insert member can be inserted from the tunnel longitudinal direction. The inserted member includes a slit that allows the connecting member to pass through when the insertion member is inserted into the insertion hole, and the insertion member inserted into the insertion hole and the inserted member have an insertion hole diameter. The segment connecting device is configured so that the segments can be connected to each other in the direction, and the slit expands toward the radially outer side of the insertion hole in the longitudinal direction of the insertion hole. formed in a fan shape, said insert member and said in a state where the engagement between the insertion member into the insertion hole radially, Ri said allowing the posture changes along the insertion hole circumferentially with respect to slits of the connecting member tare, The engagement surface between the insertion member and the member to be inserted is formed as an arc surface along the circumferential direction of the insertion hole, and the engagement between the insertion member and the member to be inserted is a surface within a range in which the posture change is allowed. By contact One lies in the fact.

[Action and effect]
The slit is formed in a fan shape that expands toward the radially outer side of the insertion hole as viewed in the longitudinal direction of the insertion hole, and the connecting member in a state where the insertion member and the member to be inserted are engaged in the insertion hole radial direction. Since the posture change along the circumferential direction of the insertion hole with respect to the slit is allowed, the insertion member and the inserted member are within the range of the fan-shaped slit width that expands toward the radially outer side of the insertion hole in the longitudinal direction of the insertion hole. Can be allowed to change the posture of the connecting member along the circumferential direction of the insertion hole in a state in which is engaged in the radial direction of the insertion hole.
Therefore, even when the insertion bracket or inserted bracket is fixed to the segment by changing the predetermined posture with respect to the joint surface as necessary, the manufacturing cost of the segment connecting device is not required without separately manufacturing the insertion bracket or inserted bracket. The insertion of the connecting member into the slit accompanying the insertion of the insertion member into the insertion hole can be allowed while suppressing the increase of the insertion member.
In addition, since the slit is formed in a fan shape that expands toward the radially outer side of the insertion hole as viewed in the longitudinal direction of the insertion hole, the engagement allowance between the insertion member and the member to be inserted is difficult to decrease (the catch is shallow). It is difficult to reduce the strength of the member to be inserted.

Further, the engagement surface between the insertion member and the member to be inserted is arranged in the circumferential direction of the insertion hole that allows the posture change of the connecting member with respect to the slit in a state where the insertion member and the member to be inserted are engaged in the radial direction of the insertion hole. Since it forms in the circular arc surface which follows, it is easy to ensure the engagement margin of an insertion member and a to-be-inserted member irrespective of the attitude | position change along the insertion hole circumferential direction with respect to the slit of a connection member.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a segment connecting device (hereinafter simply referred to as a connecting device) C according to the present invention. As will be described later, reinforced concrete tunnel segments B and K which are adjacent in the circumferential direction of the tunnel are connected to the tunnels of the segments B and K, respectively. In order to abut the joint surfaces 3 formed at the end in the circumferential direction and connect them to each other, an insertion fitting 4a fixed to the joint surface 3 side of one segment and a cover fixed to the joint surface 3 side of the other segment And an insertion fitting 4b.

  As shown in FIG. 2, the insertion fitting 4a includes an insertion shaft member 9a that can be inserted into the insertion fitting 4b from the longitudinal direction of the tunnel, a fixing member 14a that can be fixed to the segments B and K, and an insertion shaft member 9a. A connecting member 15 that integrally connects the fixing member 14a and an anchor bar 11 embedded in the segments B and K are integrally provided.

The connecting member 15 is formed in a plate shape with a dimension in the segment thickness direction smaller than that of the insertion shaft member 9a, and is provided at a position sandwiched between the insertion shaft member 9a and the fixing member 14a.
Further, the insertion fitting 4a is formed in a symmetrical shape with a virtual plane X passing through the center position in the thickness direction of the connecting member 15 interposed therebetween.

  As shown in FIG. 3, the inserted metal fitting 4b can be fixed to the inserted member 16 having an insertion hole 9b through which the insertion shaft member 9a can be inserted from the tunnel longitudinal direction, and the segments B and K. The fixing member 14b and the anchor bars 11 embedded in the segments B and K are integrally provided.

The inserted member 16 includes a slit 17 along the longitudinal direction of the insertion hole 9b that allows insertion of the connecting member 15 when the insertion shaft member 9a is inserted into the insertion hole 9b, and is inserted into the insertion hole 9b. The members 9a and the inserted member 16 are engaged with each other in the insertion hole radial direction so that the segments B and K can be connected to each other.
The metal fitting 4b to be inserted is formed in a symmetrical shape with a virtual plane Y passing through the center position of the slit 17 in the slit width direction.

  And the slit 17 is formed in the fan shape which expands toward the radial direction outer side of the insertion hole 9b by the longitudinal direction view of the insertion hole 9b, and as shown in FIG. 4, the insertion shaft member 9a and the member 16 to be inserted are formed. The posture change along the circumferential direction of the insertion hole with respect to the slit 17 of the connecting member 15 in a state of being engaged in the radial direction of the insertion hole is allowed.

  Further, the coupling member 15 is inserted into the slit 17 with the engaging surface 10 of the insertion shaft member 9a and the inserted member 16 engaged with the insertion shaft member 9a and the inserted member 16 in the radial direction of the insertion hole. It is formed on a circular arc surface along the circumferential direction of the insertion hole that allows the posture change along the circumferential direction of the hole.

  FIG. 5 shows a substantially cylindrical segment ring R in which three types of tunnel segments A, B, K adjacent to each other in the circumferential direction of the tunnel are connected to each other. As shown in FIG. Three B segments B having three A segments A having left and right side edges 1a, side edges 1a parallel to the tunnel longitudinal direction, and inclined side edges 1b inclined with respect to the tunnel longitudinal direction; The K segment K provided with the inclined side 1b symmetrically is connected.

  FIGS. 7 to 9 show one of a pair of B segments B installed in a symmetrical manner in order to configure the upper part of the tunnel ring R using the connecting device C according to the present invention, A tunnel segment connection structure in which a K segment (hereinafter referred to as a key segment) K that is pushed in between segments B and connected last is connected, and a connection structure between a key segment K and the other B segment B (not shown) is the same. Therefore, it is omitted.

  The B segment B and the key segment K are provided at two locations in the tunnel longitudinal direction by abutting the end faces in the tunnel circumferential direction of each segment body 2, that is, the joint surfaces 3 formed along the inclined side 1b. Are connected to each other by a connecting device C (C1, C2) of the same specification, and each segment body 2 is made of reinforced concrete in which reinforcing reinforcing bars 5 are arranged in a hook shape, A male fitting 6a for connection is provided, and a female fitting 6b for connection is provided on the end surface on the face side.

  Both the key segment K and the B segment B are formed with the same constant width along the tunnel longitudinal direction, and each joint surface 3 has an opening with respect to the line segment L1 along the tunnel longitudinal direction in plan view. The key segment K is formed so as to be inclined toward the key segment K toward the side, and the key segment K is formed in a substantially trapezoidal shape (isosceles trapezoidal shape) that is symmetrical in a plan view.

  As shown in FIGS. 8 and 9, the B segment B and the key segment K are configured so that the inner peripheral surface 7 and the outer peripheral surface 8 of the segment body 2 are substantially parallel to each other along the tunnel circumferential direction. The joint surface 3 has a key segment K with the outer peripheral surface 8 facing upward, and a joint surface 3 between the pair of B segments B along the joint surface 3 in a substantially vertical direction. Inclined with respect to the normal L2 of the curved surface (inner peripheral surface 7 or outer peripheral surface 8) at the intersection with the joint surface 3 in a front view along the tunnel longitudinal direction so that it can enter from the tunnel radial direction It is formed on the inclined surface.

  Of the connecting devices C provided at the two locations, the connecting device C1 provided on the anti-protrusion side is located inside the reinforcing reinforcing bars 5 arranged in a hook shape on the segment body 2 as shown in FIG. The metal fitting 4b to be inserted is fixed to the key segment K in such a posture that the virtual plane Y is substantially perpendicular to the joint surface 3 and parallel to the tunnel longitudinal direction so that the anchor bar 11 can be accommodated. The insertion fitting 4a is fixed to the B segment B in such a posture that the virtual plane X is inclined with respect to the joint surface 3 and parallel to the tunnel longitudinal direction.

  Further, as shown in FIG. 9, the connecting device C2 provided on the face side has the insertion metal fitting 4a so that the anchor bar 11 is placed inside the reinforcing bar 5 that is arranged in a hook shape on the segment body 2. The virtual plane X is fixed to the key segment K in a posture that is substantially perpendicular to the joint surface 3 and parallel to the tunnel longitudinal direction. It is fixed to the B segment B in a posture that is inclined with respect to the surface 3 and parallel to the longitudinal direction of the tunnel.

  When the key segment K is pushed between the B segments B on the face side of the joint surface 3 in the B segment B and the joint side 3 of the joint surface 3 in the key segment K, the insertion shaft member 9a enters. An allowable lateral groove 12 is formed.

  Then, as shown in FIG. 5 (a), the anti-mouth side portion of the key segment K is inserted between the left and right B segments B in advance from the tunnel radial direction, and then, between the B segments B by a pushing device (not shown). The insertion shaft member 9a is inserted into the groove 12 and inserted into the insertion hole 9b of each inserted member 16, and the insertion shaft member 9a is inserted into each inserted member 16 into the insertion hole diameter. The segment ring R is constructed as shown in FIG. 5B by engaging the B segment B and the key segment K with each other in the direction.

[Other Embodiments]
1. The segment connecting device according to the present invention may be used for connecting metal tunnel segments.
2. The segment connecting device according to the present invention may be used for connecting adjacent tunnel segments in the circumferential direction of the tunnel with butting joint surfaces parallel to the longitudinal direction of the tunnel.

Perspective view of segment connecting device (B) Front view of insertion bracket (b) Top view of insertion bracket (c) Side view of insertion bracket (B) Front view of inserted metal fitting (b) Partial cross-sectional view of inserted metal fitting (c) Side view of inserted metal fitting Action explanatory diagram of segment connecting device Tunnel ring perspective view Exploded view of the segments that make up the tunnel ring Partial sectional plan view showing tunnel segment connection structure Sectional view taken along line VIII-VIII in FIG. IX-IX arrow sectional view of FIG.

DESCRIPTION OF SYMBOLS 3 Joint surface 4a Insertion metal fitting 4b Insertion metal fitting 9a Insertion member 9b Insertion hole 10 Engagement surface 14a Fixing member 15 Connection member 16 Insertion member 17 Slit B segment (B segment)
K segment (K segment)

Claims (1)

In order to connect adjacent tunnel segments in the tunnel circumferential direction to each other by joining the joint surfaces formed at the ends of the tunnel circumferential direction of each segment, the insertion bracket fixed to the joint surface side of one segment, and the other With a fitting to be inserted fixed to the joint surface side of the segment of
The insertion fitting includes an insertion member that can be inserted into the insertion fitting from a tunnel longitudinal direction, a fixing member that can be fixed to the segment, and a connecting member that integrally connects the insertion member and the fixing member,
The connecting member is formed at a position sandwiched between the insertion member and the fixing member so that the dimension in the segment thickness direction is smaller than that of the insertion member. It has a member to be inserted in which an insertion hole that can be inserted from the longitudinal direction of the tunnel is formed,
The inserted member includes a slit that allows insertion of the connecting member when the insertion member is inserted into the insertion hole,
A segment coupling device configured such that the insertion member inserted into the insertion hole and the inserted member are engaged with each other in the radial direction of the insertion hole, and the segments are connectable.
The slit is formed in a fan shape that expands toward the radially outer side of the insertion hole as viewed in the longitudinal direction of the insertion hole, and the insertion member and the inserted member are engaged in the insertion hole radial direction. of the the allowable change the position along the insertion hole circumferentially with respect to the slit and tear of the connecting member is, formed in a circular arc surface along the engagement surface to the insertion hole circumferential direction of the object insertion member and the insert member A segment coupling device in which the insertion member and the inserted member are engaged by surface contact within a range in which the posture change is allowed .

Images