JP2019090300A - Shield segment joint member - Google Patents

Abstract

To provide a shield segment joint member that provides excellent assemblability and workability and is inexpensive.SOLUTION: A joint member 1 comprises: a protrusion part 10 that is protruded from a joining surface 101 of one member 100 to be joined; a reception part 20 that is embedded in the one member 100 to be joined; and a coupling part that is embedded in the one member 100 to be joined and connects the protrusion part 10 with the reception part 20. The other joint member comprises: a protrusion part that is protruded from a joining surface of the other member to be joined; a reception part that is embedded in the other member to be joined; and a coupling part that is embedded in the other member to be joined and connects the protrusion part with the reception part. The reception part 20 of the joint member 1 comprises an aperture 23 into which the protrusion part of the other joint member is capable of being inserted from a direction approximately in parallel with the joining surface and is capable of holding the protrusion part of the other joint member so that the protrusion part of the other joint member is inhibited from coming out in a direction perpendicular to the joining surface. The reception part of the other joint member comprises an aperture into which the protrusion part 10 of the joint member is capable of being inserted from a direction approximately in parallel with the joining surface and is capable of holding the protrusion part 10 so that the protrusion part is inhibited from coming out in the direction perpendicular to the joining surface.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a joint that joins precast members made of concrete to each other, and more particularly to a joint member for a shield segment that is suitable for moving two members parallel to a joint surface and joining them.

  As a method of joining two members, a method using a bolt inclined to the joint surface is known. For example, in Patent Document 1, there is a method of forming an internal thread in one member, forming a hole for passing a bolt and a space for fixing a nut in the other member, and connecting the two members with the bolt. It is described (paragraph 0004 of patent document 1, FIG. 18).

  In Patent Document 2, a female cone is provided on one member, and a male cone is provided on the other member, and both members are moved in a direction parallel to the joint surface to form a female cone and a male. The method of fitting the cones of (1) is described (paragraph 0004 of patent document 2, FIG. 6).

JP, 2010-236348, A JP, 2015-137525, A

  In the joint by the inclined bolt described in Patent Document 1, it is necessary to fasten the bolt while maintaining the state in which the two members are accurately positioned, and there is a problem that the construction is complicated.

  When a joint in which a female cone and a male cone are combined as described in Patent Document 2 is used, the two members are joined by sliding them in the direction of the joint surface with the joint surfaces of the two members in contact. Since it can be carried out, its workability is better than in the case where inclined bolts are used. However, there is a problem that the manufacturing cost and the part management cost become large because parts having different shapes such as a female cone and a male cone are required.

  Therefore, an object of the present invention is to provide an inexpensive shield segment joint member having good assemblability and workability.

  The joint member according to the present invention is a joint member for a shield segment which can connect precast joint members made of concrete in a state where the joint portions of the respective joint members face each other by combining other joint members. The joint member is embedded in the projecting portion projecting from the joining surface of the one joining member, the receiving portion embedded in the one joining member, and the projecting portion embedded in the one joining member. And the connecting portion for connecting the receiving portion, and the other joint member includes a protrusion projecting from the joining surface of the other joined member, a receiving portion embedded in the other joined member, and the other joined member. The joint portion is embedded in the joint member and has a connection portion connecting the projection portion and the reception portion. The reception portion of the joint member is provided with an opening portion into which the projection portion of another joint member can be inserted from a direction substantially parallel to the joint surface. , Remove the inserted protrusion in the direction perpendicular to the bonding surface And the receiving portion of the other joint member has an opening into which the projection of the joint member can be inserted from a direction substantially parallel to the joint surface, and the inserted projection is in a direction perpendicular to the joint surface The inner surface of the receiving portion and the side surface in the depth direction of the projecting portion of the other connecting member inserted into the receiving portion can be held so as not to come out, the other connecting member is in the joining direction and / or the insertion direction It has an engaging part engaged so as not to come out. It is characterized by

  According to the present invention, it is possible to provide an inexpensive shield segment joint member that is easy to assemble and install.

It is a figure which shows the shape of the coupling member for shield segments which is one Embodiment of this invention, (A) is a front view, (B) is a left view, (C) is a right view, (D) is a top view It is. (A)-(C) are figures which show the joining procedure by the coupling member for shield segments. It is a figure explaining the application to the shield of the joint member for shield segments. It is a figure explaining the engaging part of the coupling member for shield segments which concerns on one Embodiment of this invention, (A) is a perspective view, (B) is a front view, (C) is a left view, (D) is. A bottom view and (E) are right side views. It is a figure explaining the other example of the engaging part of the coupling member for shield segments which concerns on one Embodiment of this invention, (A) is a perspective view, (B) is a front view, (C) is a left view. (D) is a bottom view and (E) is a right side view.

  A shield segment joint member (hereinafter simply referred to as a “joint member”) 1 according to an embodiment of the present invention will be described. FIG. 1 is a view for explaining the shape of the joint member 1, (A) is a front view, (B) is a left side view, (C) is a right side view, and (D) is a plan view. In order to simplify the following description, as indicated by the arrows in FIG. 1A, the horizontal direction of the paper is referred to as the insertion direction, the vertical direction of the paper is referred to as the joining direction, and the direction perpendicular to the paper is referred to as the depth direction. Do.

  The joint member 1 is combined with another joint member to form a joint for joining in a state where the joint surface 101 of the joint member 100 and the joint surface of the other joint member are in contact with each other. Hereinafter, other joint members in the present invention will be described as having substantially the same structure as the illustrated joint member 1.

  The joint member 1 is a protrusion 10 embedded in the member to be joined 100 and a protrusion 10 which protrudes from the joint surface 101 of the member to be joined 100 in the negative direction of the joint direction, the receiver 20 embedded in the member 100 to be joined And the connection part 30 which connects the receiving part 20 with each other. Further, in the joint member 1, engaging portions are formed on the inner surface of the receiving portion 20 and the projecting portion 10, and the engaging portions will be described later. In this embodiment, the joint member 1 is formed by forging, and the projecting portion 10, the receiving portion 20, and the connecting portion 30 are integrally formed by forging, but methods other than forging, for example, casting or cutting It is possible to form by three-dimensional modeling, electric discharge machining, bonding by welding or the like.

  The entire protrusion 10 protrudes from the bonding surface 101. That is, the joint surface 101 is the boundary between the protrusion 10 and the connection portion 30. As shown in FIGS. 1 (B) and 1 (C), the cross-sectional shape of the protrusion 10 when cut by a plane perpendicular to the insertion direction is a trapezoidal shape where the upper edge 12 is smaller than the lower edge 11, and this cross-sectional shape Is constant in the insertion direction. The end face 13 and the end face 14 are perpendicular to the insertion direction. That is, the three-dimensional shape of the protrusion 10 is a uniaxial wedge shape in which the width in the depth direction gradually decreases from the end face on the side opposite to the joining face to the end face on the joining face side. The end face 13 and the end face 14 may be inclined with respect to the insertion direction or may be provided with asperities.

  The receiving portion 20 is embedded in the joined member 100 such that the position in one joining direction of the end face in the joining direction coincides with the joining surface 101. The receiving portion 20 is provided with two side walls 21 and a top portion 22, and the end face on the right side of FIG. 1A is an opening 23, from which the protrusion of another joint member can be inserted. It has become. A space defined by the two side surfaces 21, the top 22, the opening 23, and the end face 24 a facing the opening 23 is a housing 24 that accommodates the projections of other coupling members inserted from the opening 23. It has become. The cross-sectional shape of the accommodation portion 24 taken along a plane perpendicular to the insertion direction is such that the width of the upper edge 23a is equal to the width of the lower edge 11 of the projection 10 and the width of the lower edge 23b is the width of the upper edge 12 of the projection 10 And the cross-sectional shape is constant in the insertion direction. Further, the length in the insertion direction of the housing portion 24 is substantially equal to the length in the same direction of the protrusion 10. That is, the shape of the housing portion 24 is substantially the same as the shape of the projecting portion of the other joint member, and the housing portion 24 can completely accommodate the projecting portion of the other joint member. The position of one of the end faces in the joining direction of the receiving portion 20 in the joining direction may not coincide with the joining surface 101.

  In a state where the projection of another joint member is inserted into the receiving portion 20, when a tensile force acts on the joint surface, the projection of the other joint member pushes the two side plates 21 apart and tries to break out However, the side plate 21 is supported by the end face 24a of the housing portion 24 and the top 22 in addition to its own rigidity, and is restrained by the connected member 100, so it can not be removed. Of course, the side plate 21 is reinforced by providing reinforcing means such as ribs and flanges on the outside of the side plate 21 other than the method of increasing the thickness and enhancing the strength, thereby preventing the side plate 21 from being pushed out from the inside It may be configured to

  Although the connection part 30 is a substantially rectangular parallelepiped member and is embedded in the to-be-joined member 100, of course, it is not limited to this. The receiving portion 20 is connected to one end surface 31 of the connecting portion 30 in the insertion direction, and the projecting portion 10 is connected to one end surface 32 of the connecting direction. The position in the insertion direction of the end surface 14 of the protrusion 10 and the end surface 24 a of the accommodation portion 24 is in a positional relationship that matches the end surface 31 of the connection portion 30. In this example, the shape of the connecting portion 30 is a rectangular solid to facilitate manufacture, but the projecting portion 10 and the receiving portion 20 are generally connected in the positional relationship as described above, and another joint member is used at the time of joining Other shapes may be used as long as they can withstand the load when pressed by the projection of the.

  Various materials can be used as the material of the joint member 1 according to the desired strength, the manufacturing cost, the environmental conditions in which the connected member 100 is used, and the like.

  From the viewpoint of manufacturing cost, it is preferable that the other joint members have the same shape as the joint member 1, but it has a projection, a receiving portion, and a connecting portion functionally equivalent to the connection part 1; The receiving portion of the member is shaped to be able to hold the opening into which the protrusion 10 of the joint member 1 can be inserted from the direction substantially parallel to the bonding surface and the inserted protrusion 10 not to be pulled out from the bonding surface in the bonding direction. The shape may be different as long as the housing portion is provided. In addition, the materials of the other joint members and the joint member 1 may be different.

  Next, with reference to FIG. 2, the joining method of the member using the coupling member 1 is demonstrated. In FIG. 2, it is assumed that the member to be joined 100 b is joined to the member to be joined 100 a which is an existing member. The joint member 1a of the same shape as the joint member 1 of FIG. 1 is fixed to the member to be joined 100a, and the joint member 1b of the same shape as the joint member 1 of FIG. 1 is fixed to the member to be connected 100b. The protrusion 10a of the joint member 1a protrudes from the joint surface 101a, and the protrusion 10b of the joint member 1b protrudes from the joint surface 101b.

  Further, a space 102a is provided at a position adjacent to the joint member 1a of the joined member 100a in the insertion direction, and a space 102b is provided at a position adjacent to the joint member 1b of the joined member 100b in the insertion direction. The spaces 102a and 102b can accommodate the protrusions 10b and 10a, and can be inserted in the bonding direction from the bonding surfaces 101a and 101b.

  First, as shown in FIG. 2A, the bonding surface 101b of the bonding member 100b faces the bonding portion 101a, and the positions of the protruding portion 10b and the space 102a in the insertion direction coincide with each other. Place in the vicinity.

  From this state, as shown by arrow A in FIG. 2 (A), the member 100b to be joined is moved in the direction of the member 100a to be joined, and the joining surface 100a and the joining surface 100b are brought into contact with each other. It will be in the state. The protrusion 10a is accommodated in the space 102b, and the protrusion 10b is accommodated in the space 102a.

  Next, in a state where the bonding surface 101a and the bonding surface 101b are in contact with each other, the member to be bonded 100b is moved in the direction of arrow B in FIG. 2 (B), and as shown in FIG. 2 (C) In the receiving portion 20a, the projecting portion 10a is accommodated in the receiving portion 20b. As described above, since the receiving portion 20a (20b) has a shape capable of holding the projecting portion 10b (10a) so as not to be pulled out in the joining direction, the joint member 1a is combined with another joint member 1b 7 can be configured.

  In the joint member 1 according to the embodiment of the present invention, when the members to be joined are inserted between the members to be joined made of precast concrete installed in advance, the joining surfaces of the members to be joined are in the insertion direction It can be applied by inclining it by a predetermined angle. As a specific example, the process of joining the last segment with respect to the segment group joined in the circumferential direction at the time of forming the ring member used for a shield construction method can be mentioned, and a ring member is completed.

  According to the joint member 1, the receiving portion 20 accommodates the opening 23 into which the projection of the other joint member can be inserted and the projection of the other joint member inserted and prevents the joint portion from coming out of the joint surface The receiving part 20 which can be hold | maintained is provided. Therefore, it can join easily only by making the joint surface of two to-be-joined members contact | abut, and moving two joint members relatively to an insertion direction.

  The joint member 1 includes a connecting portion 30 that connects the projecting portion 10 and the receiving portion 20, and is configured as an integral part. Therefore, it can be easily attached to the connected member 100.

  According to the joint member 1, the protrusion 10 is also inserted into the receiving portion of another joint member and held so as not to come out of the joint surface, and two engagement points are formed. Therefore, a strong joint can be formed.

  According to the joint member 1, the protruding portion 10 and the connecting portion 30 are disposed across the joint surface. Therefore, the joint configured as the joint member 1 can not only resist the tensile force along the joint direction but also resist the shear force on the joint surface.

  FIG. 3 shows an example in which the joint member 1 of the present invention is applied to a shield construction method for constructing a tunnel in the ground. In the shield method, segments 81 and 82 manufactured in advance in a factory or the like are joined in the circumferential direction to produce a ring 83, and the rings 83 are sequentially connected in the axial direction to construct a tunnel 80. The segment 82 is a segment to be joined last, and the junction surface is slightly inclined with respect to the axial direction of the tunnel. The invention can preferably be used for the circumferential joints 84, 85 of the segments which are symbolically indicated by short straight lines in FIG.

  The components of the present invention described above can be implemented in combination with each other as long as there is no contradiction. The material and shape of the members to which the joint member according to the embodiment of the present invention is applied are not limited, and any precast concrete may be used if the joint surfaces are brought into contact with each other for joining. It is applicable also to a member. As a material, it is applicable to concrete, metal, a synthetic resin, a wood etc., for example. As a shape of a to-be-connected member, it is applicable to joining of members of the same kind, such as plate shape, columnar shape, and a block shape, or a different kind of member, for example.

  FIG. 4 is a view for explaining the engagement portion of the joint member according to the embodiment of the present invention, (A) is a perspective view, (B) is a front view, (C) is a left side view, (D) Is a bottom view and (E) is a right side view. The joint member 200 according to the embodiment of the present invention is, for example, as shown in FIGS. 4A to 4E, inserted into the inner surfaces of the opposing side walls 221a and 221b of the receiving portion 224 and the receiving portion 224. Engaging portions 271a, 271b, 272a, 272b engage with the side surfaces 211a, 211b on the depth direction side of the projecting portion 210 of the other coupling member so that the other coupling member is not pulled out in the joining direction and / or the insertion direction. Have. In the joint member according to the embodiment of the present invention, the engaging portions need not necessarily be provided on both of the opposing surfaces, and the engaging portions may be formed on one surface of the inner surface of the receiving portion 224. The engaging portion may be formed on a plurality of surfaces not opposed to each other.

  The engaging portions 271a, 271b, 272a, 272b have, for example, a rectangular parallelepiped shape, a triangular shape, or an arc shape (of course, they are not limited to these shapes, and may be other polygonal shapes or irregular shapes). The engaging portions 271a and 271b on the receiving portion 224 side and the engaging portions 272a and 272b on the projecting portion 210 side of the other coupling member have the concave portion and / or the projecting portion, and the projecting portion 210 of the other coupling member Can be designed to be engaged when inserted into the receiver 224.

  Further, in the engaging portions 271a, 271b, 272a, 272b, as shown in FIGS. 4B and 4D, the insertion direction of the projecting portion 210 of the other joint member with respect to the receiving portion 224 with respect to the joint surface 201 It may be formed to be inclined. Thus, by forming the engaging portions 271a, 271b, 272a, 272b at an angle with respect to the joint surface 201, it is possible to improve the tensile strength (extraction strength) in both the insertion direction and the joint direction of the joint. it can. Of course, the aspect in which the engaging portion is formed parallel to the insertion direction is not excluded.

  In addition, the engaging portions 271a, 271b, 272a, 272b may be formed such that the width of the inner surface of the opposing side wall of the receiving portion 224 gradually decreases in the insertion direction of the other joint members. That is, the engaging portions 271a, 271b, 272a, 272b are set so that (the opening side width W1) of the engaging portions 271a and 271b on the receiving portion 224 side> (the width W2 of the end surface on the rear side in the insertion direction). You may form. For example, the edge of the engaging portion may be tapered. The tapered shape is formed, for example, such that the engaging portions 272a and 272b on the side of the projecting portion 210 narrow the width between the engaging portions from the opening in the insertion direction to the receiving portion 224 to the end surface on the back side. The engaging portions 271a and 271b on the receiving portion side can be formed to engage with the engaging portions 272a and 272b on the projecting portion 210 side. In this way, the edge of one engaging portion is reliably brought into contact with the edge of the other engaging portion to enable three-dimensional positioning, and the load in the insertion direction is also resisted to some extent. The effect of being able to Of course, parts other than the engaging part may have the same structure.

  In addition, the projecting portion 210 may have a neck portion 274 which has parallel side surfaces 273a and 273b and has a minimum width at least at a part of the joining direction. By providing the neck portion 274 having the parallel side surfaces 273a and 273b, the receiving portion 224 can be prevented from spreading outward with respect to the load in the joining direction. In addition to this, rounding, beveling, or the like may be performed on a portion where stress is likely to be concentrated, such as a corner of the receiving portion 224.

FIG. 5 is a view for explaining another example of the engaging portion of the joint member according to the embodiment of the present invention, wherein (A) is a perspective view, (B) is a front view, and (C) is a left side view , (D) is a bottom view, (E) is a right side view. As shown in FIGS. 5A to 5E, in the joint member 300 according to the embodiment of the present invention, a plurality of engaging portions 371 and 372 are formed (a ₁ , a ₂ ,..., _An , b ₁ , b ₂ ,..., b _n ) may be used. By forming a plurality of engaging portions, when the projecting portion 310 of the other catch part is inserted into the receiving portion 324, each of the engagement portions _{371,372 (a 1, a 2,} ···, a n , B ₁ , b ₂ ,..., B _n ) can be engaged, so that stresses against tensile loads in both the insertion direction and the joint direction of the joint can be dispersed in multiple stages, and the fitting portion can be made more compact It can be set to the size. The plurality of engaging portions may be formed continuously as shown in FIG. 5A, or may be formed at intervals. In addition, the shape of each engaging portion may be the same and / or similar shape, or may be partially different. Of course, the corresponding engagement portion (for example, the engagement portion 372a _i (i = 1, 2,..., N) on the projection 310 side corresponding to the engagement portion 371a _i on the reception portion 324 side) is engaged Make it possible shape.

  Also in the embodiment of the present invention shown in FIG. 5, in the same way as in the example of FIG. 4, in each engaging portion, the insertion direction of the protruding portion 310 of the other joint member with respect to the receiving portion 324 is inclined with respect to the joint surface 301 Each engaging portion may be formed such that the width of the inner surface of the opposing side walls 321a and 321b of the receiving portion 324 gradually decreases in the insertion direction of the other joint member. Also good.

DESCRIPTION OF SYMBOLS 1 Joint member, 10 protrusion part, 20 receiving part, 23 opening part, 24 accommodating part, 100 to-be-joined member, 101 joining surface

Claims (5)

A joint member for a shield segment which can connect precast joint members made of concrete in a state where the joint portions of the respective joint members face each other by combining other joint members,
The joint member is
A projecting portion which protrudes from the joining surface of one of the members to be joined;
A receiving portion embedded in one of the members to be joined;
And a connecting portion which is embedded in one of the members to be joined and which connects the protrusion and the receiving portion,
The other joint member is
A protrusion which protrudes from the joint surface of the other member to be joined;
A receiving portion embedded in the other of the members to be joined;
And a connecting portion which is embedded in the other member to be joined and which connects the protrusion and the receiving portion,
The receiving portion of the joint member has an opening portion into which the projection of another joint member can be inserted from a direction substantially parallel to the joint surface, and the inserted projection is taken out in a direction perpendicular to the joint surface It can be held so as not to
The receiving portion of the other joint member has an opening through which the projection of the joint member can be inserted from a direction substantially parallel to the joint surface, and the inserted projection is taken out in a direction perpendicular to the joint surface It can be held so as not to
The inner surface of the receiving portion and the side surface in the depth direction of the projecting portion of the other coupling member inserted into the receiving portion are such that the other coupling member is not pulled out in the joining direction and / or the insertion direction A joint member for a shield segment characterized by having an engaging portion to be engaged.   The shield segment according to claim 1, wherein the engagement portion is formed such that the insertion direction of the projection of the other joint member with respect to the reception portion is inclined with respect to the joint surface. Joint member.   The engagement portion is formed so that the width of the inner surface of the opposing side wall of the receiving portion gradually decreases in the insertion direction of the other joint member. Joint member for shield segment as described in 4.   The projection according to any one of claims 1 to 3, wherein the projecting portion has a pair of side surfaces, and a neck portion having a minimum distance between the side surfaces in at least a part of the joining direction. Joint member for shield segment as described in 4.   The joint member for a shield segment according to any one of claims 1 to 4, wherein a plurality of the engaging portions are formed.

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