JP2004293232A - Eccentric auxiliary member of connecting part for connecting concrete part, connecting part for concrete part and connecting method for concrete part - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily perform work at a job site when connecting mutual concrete parts by preventing the development of a crack in the concrete parts. <P>SOLUTION: This eccentric auxiliary member 10 has a first member 20 having a bottomed box body 22 having an opening part having the opening one side, and a first screw bar 24 projecting from the bottom reverse 23 of this bottomed box body, a second member 30 having a second screw bar 31 and a circular base 33 arranged at the root of this second screw bar 31, and a second member holding member 40 installed in the bottomed box body so as to block up the opening part of the bottomed box body 22, and forming an inserting hole 44 for inserting the second screw bar, and is constituted so that the circular base 33 of the second member 30 is housed in a housing space 75a composed of the bottomed box body 22 and the second member holding member 40, and the second screw bar 31 is projected to the opposite side of the first screw bar 24 via the inserting hole 44, and the second member 30 can be moved via the housing space 75a and the inserting hole 44. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an eccentric auxiliary member for a connecting part that connects concrete parts such as segments.
[0002]
[Prior art]
Conventionally, the structure which connects the segments which comprise the tunnel wall body by a shield construction method is known (for example, refer patent document 1). As shown in FIG. 9, this connection structure has a male connection portion 50 </ b> A at the end 2 of one segment 1 and a female connection portion 50 </ b> B at the end 4 of the other segment 3. The segments 1 and 3 are connected by combining 50A and 50B.
The male connecting portion 50A includes an insert fitting 51 embedded in the end 2 of the segment 1 in advance and a pin joint insertion hole 54 formed in the insert fitting 51 by screwing a nut member 53 to a screw portion 52 formed on the outer periphery. A pin joint 55 into which one end 55a is inserted, and a pin joint holding member 57 that holds the pin joint 55 by forming a pin joint insertion hole 56 through which the other end 55b of the pin joint 55 passes. Prepare. That is, one end 55 a side of the pin joint 55 is inserted into the pin joint insertion hole 54 of the insert fitting 51, and the other end 55 b side of the pin joint 55 is passed through the pin joint insertion hole 56 to insert the pin joint holding member 57 into the insert fitting 51. It is attached to. Since the threaded portion is formed on the inner peripheral surface 58 of the pin joint holding member 57 and the outer peripheral surface 59 of the insert fitting 51, the pin joint holding member 57 is attached to the insert fitting 51 via these threaded portions, so that the pin The nut member 53 is pressed against the end surface 60 of the insert fitting 51 by the joint holding member 57, and the pin joint 55 is fixed. The diameters of the pin joint insertion hole 56 and the pin joint insertion hole 54 are slightly larger than the outer diameter of the pin joint 55, and a space 62 is formed between the peripheral surface 61 of the nut member 53 and the pin joint holding member 57. ing.
The female connecting portion 50 </ b> B is configured by a concave locking member 64 provided in a concave portion 63 formed in the end portion 4 of the other segment 3. An elastic member 66 is provided on the bottom 65 of the concave locking member 64, and when the other end 55 b of the pin joint 55 is abutted against the central protrusion 66 a of the elastic member 66, the annular elastic portion 67 of the elastic member 66 The wedge member 68 moves as indicated by the alternate long and short dash line to grip the other end 55b side of the pin joint 55.
Therefore, the one end 55b side of the pin joint 55 of the male coupling portion 50A is inserted into the insertion hole 68a and abuts against the central protrusion 66a of the elastic member 66, whereby the one end 55b side of the pin joint 55 is gripped by the wedge member 68 and the segment. 1,3 are connected.
The pin joint insertion hole 56 and the space 62 between the pin joint insertion hole 54 and the pin joint 55 and the space 62 between the peripheral surface 61 of the nut member 53 and the pin joint holding member 57 form a movable space for the pin joint 55. Therefore, after the segments 1 and 3 are connected to each other, the stress that tries to shift the segments 1 and 3 causes a frictional force generated between the nut member 53 and the insert fitting 51 and the pin joint holding member 57. If exceeded, the pin joint 55 can move through the movable space together with the nut member 53, so that the stress applied to the connected segments 1 and 3 can be buffered, and the cracks are generated in the segments 1 and 3 due to the stress. Can be prevented.
[0003]
[Patent Document 1]
JP-A-8-189299 [0004]
[Problems to be solved by the invention]
In the connection structure according to Patent Document 1, in order to form the male connection portion 50A, the pin joint holding member 57 must be screwed to the end portion 2 of the segment 1 in the field, and the pin joint 55 must be attached. The work at the site when connecting them becomes complicated. In addition, it is conceivable to deliver the segment 1 to the site in a state where the male coupling portion 50A is formed in advance on the end 2 of the segment 1 (that is, with the pin joint 55 attached). There is a problem that the pin joint 55 is damaged at the time of carrying in, or the male coupling portion 50A is broken due to an impact applied to the pin joint 55, which is not preferable.
Further, if the positions of the male and female connecting portions 50A and 50B of the segments 1 and 3 to be connected are slightly shifted, the connection between the segments is hindered. Since the pin joint holding member 57 is tightened to fix the pin joint 55 so that it does not move, when the positions of the male and female connecting portions 50A and 50B are shifted when the segments are connected, the positional shift is corrected. In addition, the pin joint holding member 57 must be loosened to adjust the position of the pin joint 55, and the work at the site when connecting the segments becomes complicated.
The present invention is capable of buffering the stress of trying to shift each concrete part after the concrete parts such as segments are connected to each other and preventing cracks from occurring in the concrete parts. An object of the present invention is to provide an eccentric assisting member and the like used for connecting concrete parts that can be easily operated in the above.
[0005]
[Means for Solving the Problems]
The eccentric auxiliary member of the connecting part for connecting the concrete parts according to the present invention includes a bottomed box body having an open portion that is open on one side, and a first connecting member mounting portion that protrudes from the bottom rear surface of the bottomed box body. A first member provided with a second member, a second connecting member mounting portion, a second member provided with a base provided at the base of the second connecting member mounting portion, and the open portion of the bottomed box so as to be closed. And a second member holding member formed with an insertion hole through which the second connecting material attaching portion is passed, and the base of the second member is a bottomed box and the second member holding member. And the second connecting member mounting portion protrudes to the opposite side of the first connecting member mounting portion through the insertion hole, and the second member is the storage space and the insertion hole. It was configured to be movable through the network.
Moreover, the 1st connection material attachment part and the 2nd connection material attachment part were made into the eccentric auxiliary member formed with the screw rod.
Also, the bottomed box is formed in a cylindrical shape, and has a threaded portion on the inner or outer periphery of the cylindrical body, and has a threaded portion on the outer or inner periphery of the second member holding member. The bottomed box and the second member holding member are detachably attached to the eccentric auxiliary member.
In addition, an elastic member is interposed between at least one of the bottom inner surface of the bottomed box and the base and between the inner surface of the second member holding member facing the bottom inner surface of the bottomed box and the base. An eccentric auxiliary member was used.
In the connecting part of the concrete part using the eccentric auxiliary member according to the present invention, the connecting material connected to the connecting part formed at the end of one concrete part to be connected is the first connecting material attaching part. The connecting material connected to the connecting portion formed at the end of the other concrete part to be connected and connected is attached to the second connecting material attaching portion.
In the method for connecting concrete parts using the eccentric auxiliary member according to the present invention, the same connecting material is attached to the first connecting material mounting portion and the second connecting material mounting portion, and each concrete component to be connected is connected. A connecting portion connected by a connecting material is formed at each end, the connecting material attached to the first connecting material attaching portion is connected to the connecting portion of one concrete part, and the second connecting material attaching portion The connecting part of the other concrete part is connected to the connecting member attached to the slab.
In the above method, the connecting material is formed by a hole-in anchor, and the connecting portion is formed by a connecting hole to which the hole-in anchor is fixed.
In the above method, the concrete parts to be connected are the segments constituting the tunnel wall body by the shield method, and the segments in the tunnel traveling direction of the tunnel wall body are connected.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1
1 is a cross-sectional view showing an eccentric auxiliary member of a connecting part for connecting segments as concrete parts, FIG. 2 is an exploded view of the eccentric auxiliary member, FIG. 3 is a diagram showing a connecting part for connecting segments, and FIGS. It is a figure which shows the connection method of the segment using an eccentric auxiliary member.
As shown in FIGS. 1 and 2, the eccentric assisting member 10 according to the first embodiment includes a first member 20, a second member 30, and a second member holding member 40.
The first member 20 includes a cylindrical bottomed box 22 having an open portion 21 open on one side, and a first connecting member provided so as to protrude from the center of the circle of the bottom rear surface 23 of the bottomed box 22. And a first screw rod 24 as an attachment portion. The first screw rod 24 has a bolt shape with a thread portion 25 formed on the outer periphery.
The second member 30 includes a second screw rod 31 as a second connecting member attachment portion and a circular base 33 provided at the root 32 of the second screw rod 31. The circular diameter of the circular base 33 is larger than the diameter of the second screw rod 31, and the second screw rod 31 is provided so as to protrude from the center of one circular surface 34 of the circular base 33. The second screw rod 31 has a bolt shape with a thread portion 35 formed on the outer periphery.
The 2nd member holding member 40 is attached so that the opening part 21 of the bottomed box 22 may be plugged up, Comprising: The circular lid formed in the diameter corresponding to the cylindrical internal diameter of the cylindrical accommodating part 22a of the bottomed box 22 An insertion hole 44 for passing the second screw rod 31 is formed so as to pass through the centers of the circular surfaces 42 and 43 of the portion 41, and the axis of the circular lid portion 41 is formed from the peripheral edge of the circular surface 43 inside the circular lid portion 41. A cylindrical housing 45 that extends in the direction is provided, and a base housing portion 46 that houses the circular base 33 of the second member 30 is formed by the circular surface 43 and the inner peripheral surface 45 a of the cylindrical flange 45. On the outer periphery of the cylindrical flange 45, a screw portion 47 is formed that is screwed into a screw portion 27 formed on the cylinder inner periphery 26 of the cylindrical housing portion 22 a of the bottomed box 22.
[0007]
That is, the eccentric assisting member 10 has the second screw rod 31 inserted into the insertion hole 44 of the second member holding member 40 in a state where the circular base 33 of the second member 30 is stored in the cylindrical storage portion 22a of the bottomed box 22. After passing, the threaded portion 47 of the second member holding member 40 is screwed to the threaded portion 27 of the bottomed box body 22, so that the circular base of the second member 30 is fitted into the base storage portion 46 of the second member holding member 40. 33 is housed and the second screw rod 31 is assembled so as to protrude in the opposite direction to the first screw rod 24.
[0008]
Note that the height H1 of the base storage portion 46 is formed to be, for example, about 2 to 3 mm higher than the height H2 of the circular base 33, and the cylindrical inner peripheral diameter of the base storage portion 46 is, for example, 4 to 4 from the circular diameter of the circular base 33. The diameter of the insertion hole 44 is about 4 to 6 mm larger than the diameter of the second screw rod 31. Further, the screw portion 35 is not formed on the outer periphery of the second screw rod 31 corresponding to the insertion hole 44.
Therefore, in the state where the eccentric assisting member 10 is assembled as shown in FIG. 1, the second member 30 is disposed via the storage space 75 a formed by the bottomed box 22 and the second member holding member 40 and the insertion hole 44. Is configured to be movable in the axial direction (direction along the axis of the second screw rod 31) and the radial direction (direction orthogonal to the axial direction of the second screw rod 31) of the second screw rod 31. That is, the second member 30 is movable in the axial direction of the second screw rod 31 through a gap 70 formed by the difference between the height H1 of the base storage portion 46 and the height H2 of the circular base 33. In addition, the circular base 33 is movable in the radial direction of the second screw rod 31 through a gap 71 between the circular base 33 and the second member holding member 40, and is further inserted into the second screw rod 31. The second screw rod 31 is movable in the radial direction via a gap 72a between the hole 44 and the hole 44.
[0009]
Further, as shown in FIG. 3, a connecting part 80 is configured by attaching hole-in anchors 72 and 73 that are the same connecting material to the first screw rod 24 and the second screw rod 31 of the eccentric assisting member 10. . As will be described below, the connecting parts 80 can connect the segments in the tunnel traveling direction of the tunnel wall.
[0010]
That is, when the hole-in anchor 72 attached to the first screw rod 24 is inserted into the connecting hole 90 as the connecting portion formed at the end 2 of the one segment 1 to be connected, as shown in FIG. The wedge member 74 of the hole-in anchor 72 expands the leading portion 76 of the hole-in anchor main body 75 and presses the leading portion 76 against the inner peripheral surface 91 of the connecting hole 90 so that the hole-in anchor is inserted into the connecting hole 90. 72 is fixed, so that the connecting part 80 is fixed to the end 2 of one segment 1. Next, a connecting hole 92 formed in the end 4 of the other segment 3 to be connected to the end 2 of the one segment 1 (the same as the connecting hole 90 formed in the end surface 2 of the one segment 1). In the state where the hole-in anchor 73 attached to the second screw rod 31 is inserted therein, the other segment 3 is pressed in the direction of the one segment 1, so that the hole-in anchor 73 is connected to the connecting hole as shown in FIG. The end 4 of the other segment 3 is connected to the end 2 of the one segment 1. By repeating the above, the segments in the tunnel traveling direction of the tunnel wall body can be easily connected. The connection between the segments in this direction is called a ring joint.
[0011]
According to the first embodiment, when connecting the other segment 3, the center position of the hole-in anchor 73 attached to the second screw rod 31 of one segment 1 and the connecting hole 92 of the other segment 3 are used. Since the second member 30 can be moved in the radial direction of the second screw rod 31, the positional deviation can be adjusted, and the segment connecting operation at the site is facilitated. That is, as in Patent Document 1, it is not necessary to loosen the holding member 57 and adjust the position of the pin joint 55 one by one.
[0012]
In addition, after the connection of the segments 1 and 3, when a stress is applied to shift the segments 1 and 3, the stress concentration on the segments 1 and 3 can be buffered by moving the second screw rod 31. A situation in which cracks occur in the segments 1 and 3 can be prevented.
[0013]
Further, since the connecting part 80 according to the first embodiment can be assembled before delivery to the site, the hole-in anchors 72 and 73 as connecting materials are connected to the connection holes 90 and 92 of the segments 1 and 3 as site work. Since it only has to be connected, field work becomes easy.
[0014]
Further, in the above, the hole-in anchors 72 and 73 which are male connection materials are attached to the first screw rod 24 and the second screw rod 31 as the same connection material, and the end portions of the segments 1 and 3 to be connected are connected. Holes in anchors 72 and 73 for connecting hole-in anchors 72 and 73 and storage holes 97 and 98 for receiving the bottomed box 22 are formed in the holes 2 and 4, and the hole-in anchors attached to the first screw rod 24 are formed. 72 is connected to the connection hole 90 of one segment 1, and the connection hole 92 of the other segment 3 is connected to the hole-in anchor 73 attached to the second screw rod 31. , 3 can be a simple structure with a hole-in anchor and a connection hole, so that construction costs can be reduced and both ends of each segment can have the same structure. , It is possible to use the inside out segment. As a result, in the case of shields that require tapered segments on the top, bottom, left, and right, such as inverted segments and non-circular segments, the types of segments can be reduced, and costs can be reduced.
Further, a female connecting material is attached to the first screw rod 24 and the second screw rod 31 as the same connecting material, and a male connecting material to be connected to the female connecting material is attached in the connecting hole of each segment to be connected. Even if they are arranged, since both ends of each segment can have the same structure, the same effect as described above can be obtained.
[0015]
In addition, the first and second connecting member mounting portions in the eccentric assisting member 10 are formed by the first and second screw rods 24 and 31, and the structure for attaching and detaching the connecting member such as the hole-in anchor has a simple configuration using screws. Therefore, the cost of the eccentric auxiliary member 10 can be reduced.
[0016]
Further, the bottomed box 22 and the second member holding member 40 in the eccentric assisting member 10 can be attached and detached via the screw portions 27 and 47, and the attachment / detachment structure between the bottomed box 22 and the second member holding member 40 is provided. Since the configuration is simple with screws, the cost of the eccentric auxiliary member 10 can be reduced.
[0017]
Therefore, the construction cost for connecting the segments in the tunnel traveling direction of the tunnel wall body can be reduced.
[0018]
Embodiment 2
Flexibility is required in order to achieve seismic performance in the longitudinal direction of the shield at the connecting portion between the segments in the tunnel traveling direction of the tunnel wall. Therefore, as shown in FIGS. 6 to 8, the second member holding between the bottom inner surface 28 of the bottomed box body 22 and one circular surface 34 a of the circular base 33 and the bottom inner surface 28 of the bottomed box body 22 is held. By inserting elastic members 95 and 96 such as rubber between the inner surface 48 of the member 40 and the other circular surface 34 of the circular base 33, the eccentric auxiliary member 10A and the connecting component 80A are configured, whereby the elastic members 95 and 96 are formed. The seismic performance can be achieved even when a tunnel is constructed in the ground where seismic examination is necessary.
The inner surface 48 of the second member holding member 40 and the circular base 33 between the bottom inner surface 28 of the bottomed box 22 and one circular surface 34a of the circular base 33 and the bottom inner surface 28 of the bottomed box 22 are opposed to each other. An elastic member may be inserted only between one of the other circular surfaces 34.
[0019]
3, 4, 5, and 8, the portion of the wedge member 74 that overlaps the first screw rod 24, the second screw rod 31, and the front split portion of the hole-in anchor should be originally indicated by a broken line. In each figure, these parts are shown by a solid line in order to clarify the configuration.
[0020]
A male connecting member is attached to one of the screw rods as a connecting member, a female connecting member is provided in the connecting hole of the segment connecting the male connecting member, and a female connecting member is provided as a connecting member to the other screw rod. You may make it provide a male connection material in the connection hole of the segment which attaches and connects this.
[0021]
In addition, in the above, since the second member holding member 40 is in a state where the second member holding member 40 is screwed, the second member holding member 40 is configured to fit in the cylindrical housing portion 22a of the bottomed box 22 of the first member 20, When the storage holes 97 and 98 (see FIGS. 4 and 5) for receiving the bottomed box body 22 are formed in the end portions 2 and 4 of the segments 1 and 3, the diameter is slightly larger than the outer diameter of the bottomed box body 22. What is necessary is just to form the same large accommodation hole 97,98 uniformly.
Further, the outer diameter of the cylindrical housing portion 22a of the bottomed box body 22 is made smaller than the diameter of the back bottom surface 23 of the bottomed box body 22, and the second member holding member is screwed to the outer periphery of the cylindrical housing portion 22a. It may be. Even in this case, by uniformly matching the outer diameter of the second member holding member with the diameter of the bottom bottom surface 23 of the bottomed box, it is possible to uniformly form the storage holes formed in the end surfaces of the segments. it can.
As described above, since both ends of each segment can be surely made to have the same structure, the segments can be used upside down, so that the types of segments can be reduced and the cost can be reduced.
[0022]
In the above description, the first and second connecting member attachment portions are formed by the first and second screw rods 24 and 31, but the engaging means provided on the connecting member and the detachable engaging means are provided. It is good also as a connection material attaching part. For example, it is good also as a connection material attaching part provided with the female or male shape engagement means corresponding to the male or female shape engagement means provided in the connection material. However, providing such an engaging means is often expensive in cost. On the other hand, as in the first and second embodiments, by forming the connecting member mounting portion in the eccentric assisting members 10 and 10A with a screw rod, the structure for attaching and detaching the connecting material has a simple configuration with screws. The effect that the cost of the eccentric auxiliary members 10 and 10A can be reduced is obtained.
[0023]
In the above description, the bottomed box body 22 and the second member holding member 40 are configured to be detachable by screws. However, the engaging means corresponding to the bottomed box body 22 and the second member holding member 40 are respectively provided. It is good also as a structure which can be provided and can be attached or detached by engagement. However, in this case as well, providing the engaging means often increases the cost. On the other hand, as in the first and second embodiments, the bottomed box 22 and the second member holding member 40 in the eccentric assisting member 10 are detachable via the screw portions 27 and 47, and the bottomed box 22 and the second By making the detachable structure with the two-member holding member 40 a simple structure using screws, an effect of reducing the cost of the eccentric assisting members 10 and 10A can be obtained.
[0024]
Further, since the second member 30 only needs to be movable, the base may have a shape other than the circular base 33.
[0025]
Further, the eccentric assisting members 10 and 10A, the connecting parts 80 and 80A, and the connecting method according to the present invention can be applied when connecting concrete parts other than the segments.
[0026]
【The invention's effect】
According to the eccentric auxiliary member of claim 1 of the present invention, since the second member is configured to be movable through the storage space and the insertion hole, it is possible to prevent a crack from occurring in the concrete part after the concrete parts are connected to each other. In addition, the work at the site when connecting concrete parts can be simplified.
According to the second aspect, since the first connecting material attaching portion and the second connecting material attaching portion are formed by the screw rods, the structure for attaching and detaching the connecting material can be simplified, and the cost of the eccentric auxiliary member can be reduced.
According to the third aspect, since the bottomed box and the second member holding member are configured to be detachable via the screw portion, the detachable structure between the bottomed box and the second member holding member can be simplified. The cost of the eccentric auxiliary member can be reduced.
According to the fourth aspect, it is possible to obtain an eccentric assisting member having flexible seismic performance.
According to the connecting part of claim 5, in addition to the above-described effects, the connecting part can be assembled before being delivered to the site. Therefore, as the field work, it is only necessary to connect the connecting material to the connecting part of the concrete part. This makes field work easier.
According to the connection method of Claim 6, since the same thing can be used as a connection material and a concrete component, the cost and construction cost of a connection material and a concrete component can be reduced.
According to the seventh aspect, since the connecting structure between the connecting part and the concrete part can be a simple structure using the hole-in anchor and the connecting hole, the construction cost can be reduced.
According to the eighth aspect, the above effect can be obtained in the connection between the segments in the tunnel traveling direction of the tunnel wall body. In addition, it is possible to use the segment upside down, and it is possible to reduce the types of segments for shields that require tapered segments on the top, bottom, left, and right, such as inverted segments and non-circular segments. Can be planned.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an eccentric assisting member according to Embodiment 1 of the present invention.
2 is an exploded view of an eccentric assisting member according to Embodiment 1. FIG.
FIG. 3 is a diagram showing a connecting component according to the first embodiment.
4 is a diagram showing a segment connecting method according to Embodiment 1. FIG.
FIG. 5 is a diagram showing a segment connection method according to Embodiment 1;
FIG. 6 is a sectional view showing an eccentric assisting member according to a second embodiment of the present invention.
7 is an exploded view of an eccentric auxiliary member according to Embodiment 2. FIG.
FIG. 8 is a diagram illustrating a connection state of segments using the connection component of the second embodiment.
FIG. 9 is a diagram showing a segment connecting method using a conventional connecting component.
[Explanation of symbols]
1,3 segments (concrete parts), 10,10A Eccentric auxiliary members,
20 1st member, 21 Opening part, 22 Bottomed box, 23 Bottom back surface,
24 1st screw rod (1st connection material attachment part), 27 Screw part, 30 2nd member,
31 Second screw rod (second connecting material mounting portion), 33 Circular base (base),
40 second member holding member, 44 insertion hole, 72, 73 hole-in anchor (connecting material), 75a storage space, 80, 80A connecting part,
90,92 Connection hole (connection part), 95,96 Elastic member.

Claims (8)

A first member comprising a bottomed box having an open part, one of which is open, and a first connecting member mounting part projecting from the bottom rear surface of the bottomed box; a second connecting member mounting part; and A second member having a base provided at the base of the second connecting member mounting portion; and a second connecting member mounting portion attached to the bottomed box body so as to close an open portion of the bottomed box body. A second member holding member having an insertion hole therethrough, wherein the base of the second member is housed in a housing space formed by the bottomed box and the second member holding member, and the second connecting member A concrete part characterized in that the mounting portion projects to the opposite side of the first connecting material mounting portion through the insertion hole, and the second member is configured to be movable through the storage space and the insertion hole. Eccentric auxiliary member for connecting parts to be connected. The eccentric auxiliary member for connecting parts for connecting concrete parts according to claim 1, wherein the first connecting material attaching part and the second connecting material attaching part are formed by screw rods. The bottomed box is formed in a cylindrical shape, and has a threaded portion on the inner periphery or outer periphery of the cylindrical body, and has a threaded portion on the outer periphery or inner periphery of the second member holding member. The eccentric auxiliary member for a connecting part for connecting concrete parts according to claim 1 or 2, wherein the bottom box and the second member holding member are detachably attached. The elastic member is inserted between at least one of the bottom inner surface of the bottomed box and the base and between the inner surface of the second member holding member facing the bottom inner surface of the bottomed box and the base. An eccentric auxiliary member for a connecting part for connecting the concrete parts according to any one of claims 1 to 3. 5. A connecting part for a concrete part using the eccentric auxiliary member according to claim 1, wherein the connecting part is connected to a connecting part formed at an end of one concrete part to be connected. A material is attached to the first connecting material attaching portion, and a connecting material connected to the connecting portion formed at the end of the other concrete part to be connected is attached to the second connecting material attaching portion. A connecting part of concrete parts characterized by that. A method for connecting concrete parts using the eccentric auxiliary member according to any one of claims 1 to 4, wherein the same connecting material is used for the first connecting material mounting portion and the second connecting material mounting portion. A connecting portion connected by a connecting material is formed at each end of each concrete component to be connected, and the connecting material attached to the first connecting material attaching portion is connected to the connecting portion of one concrete component. And connecting the connecting portion of the other concrete component to the connecting member attached to the second connecting member attaching portion. 7. The method of connecting concrete parts according to claim 6, wherein the connecting member is formed by a hole-in anchor, and the connecting part is formed by a connecting hole to which the hole-in anchor is fixed. The concrete part according to claim 6 or 7, wherein the concrete part to be connected is a segment constituting a tunnel wall body by a shield method, and the segments in the tunnel traveling direction of the tunnel wall body are connected. Concatenation method.

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