JPH0734099U - Attachment structure for tensile member of shield segment - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a tension member mounting structure for a shield segment capable of accurately transmitting the tensile force acting on the tension member to the segment through the tension member mounting portion, and dispersing and absorbing the same. [Structure] An anchor metal piece 4 for attaching a tension member is embedded in a tension member attachment portion 3 of a segment 1 for a shield tunnel, and the anchor metal article 4 is attached to a segment 1 through a plurality of anchor lines 5 embedded in the segment 1. And the end of the tension member 2 is connected to the anchor metal piece 4 with a bolt 6.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure for attaching a tension member to a shield tunnel segment, and in particular, in a tension member provided to reduce a bending moment acting on the shield tunnel segment, the tension force acting on the attachment portion of the tension member is dispersed. The present invention relates to a structure for attaching a tension member of a possible shield segment.

[0002]

[Prior art]

 In the shield tunnel segment, tension members are installed to reduce the bending moment acting on this segment. Tie rods, round steel, etc. are used for the tension members.

Then, in order to attach the tension member to the attachment portion of the tension member of the conventional segment, a screw is provided on the end portion of the tension member, while the attachment member for the tension member is fixed to the segment via the anchor bar. Then, a female screw is formed on this mounting member, and the male screw of the tension member is screwed into the female screw of the mounting member for connection.

[0004]

[Problems to be solved by the device]

 However, in the above-mentioned prior art, since the male screw provided on the tension member is connected to the screw by being formed on the mounting member, the structure is such that the coupling force between both members is weak, and in particular the tension When the mounting positions of the members are deviated, the coupling force between the two members becomes extremely weak, and the surface area that transmits the tensile force acting on the tensile member to the mounting member is small. However, there was a problem in that it was difficult to transmit to the segment, effectively disperse it, and absorb it.

The present invention has been made in view of the above circumstances, and an object thereof is to accurately transmit a tensile force acting on a tension member to a segment through a tension member attachment portion, disperse and absorb the segment. The purpose of the present invention is to provide a structure for attaching a tension member of a shield segment to be obtained.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention embeds an anchor metal piece 4 for attaching a tension member in a tension member attachment portion 3 of a segment 1 for a shield tunnel. The anchor 1 is integrated with the segment 1 via an anchor streak 5, and the end of the tension member 2 is connected to the anchor metal 4 with a bolt 6.

[0007]

[Action]

 According to the present invention, the end of the tension member 2 is connected by the bolt 6 to the anchor metal piece 4 embedded in the tension member attachment portion 3 of the segment 1 and integrated with the segment 1 by the anchor bar 5. It is possible to use the anchor metal piece 4 having a large area. As a result, the number of anchor lines 5 can be increased and properly arranged, and the segment 1 and the anchor metal piece 4 can be strongly integrated. Further, the pulling member 2 having a wide cross-sectional area can be used, and moreover, the pulling member 2 can be strongly connected to the anchor metal piece 4 by a plurality of bolts 6. As a result, the tensile force acting on the tension member 2 is accurately transmitted to the anchor metal piece 4, and the anchor metal piece 4 can disperse and absorb it in the segment 1 through the plurality of properly arranged anchor muscles 5. It will be possible.

[0008]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view showing a state where a tension member is attached to a segment by the attachment structure of the present invention, and FIG. 2 is an enlarged view of a portion corresponding to A, B, C and D of FIG. FIG. 3 is a front view of a main part of one embodiment of the idea, and FIGS.

In the embodiments shown in these figures, the segment 1 is constructed in a substantially circular shape on the peripheral wall of the shield tunnel.

Inside the segment 1, tension members 2 are attached to the upper and lower parts. The tension member 2 is installed for the purpose of reducing the bending moment acting on the segment 1.

The tension member 2 has an attachment structure in which the end of the tension member 2 is added to the anchor metal 4 embedded in the tension member attachment portion 3 of the segment 1 and is joined by a plurality of bolts 6. It is installed. As an example of the mode of bolt connection, as shown in the upper right of FIG. 2, the bolt 6 may be screwed into the bolt hole of the thick anchor metal 4 or may be thin as shown below. The anchor metal 4 may be provided with a threaded portion of a bolt 6 and the protruding threaded portion may be screwed with a cap nut 7.

The tension member attachment portion 3 is provided so as to project inside the segment 1, and the upper surface, the lower surface, and the side surface thereof are, in this embodiment, as shown in FIG. 3 and FIG. It is formed in a rectangle of the same width.

As shown in FIG. 3, the anchor metal piece 4 is formed in a rectangular shape similar to the tension member attachment portion 3 when viewed from the upper surface or the lower surface, and is embedded in the tension member attachment portion 3. It is integrated with the segment 1 by a plurality of anchor lines 5 arranged properly. It should be noted that, in FIGS. 2 to 4, the anchor metal piece 4 is hatched, though not a cross section, for the sake of clarity.

At least both ends of the tension member 2 are formed to have a rectangular cross section. Then, the end portion of the tension member 2 is brought into contact with the upper surface or the lower surface of the anchor metal piece 4 and, as shown in FIGS. 2 to 4, is inserted into the tension member 2 and screwed into the anchor metal piece 4. It is connected and fixed by a bolt 6.

In the embodiment described above, the end of the tension member 2 is connected by the bolt 6 to the anchor metal piece 4 embedded in the tension member attachment portion 3 of the segment 1 and integrated with the segment 1 by the anchor bar 5. Therefore, as can be seen from FIGS. 2 to 4, the anchor metal piece 4 having a large area can be used. Therefore, it is possible to increase the number of the anchor lines 5 and arrange them appropriately to strongly integrate the segment 1 and the anchor metal piece 4. Further, the tension member 2 having a wide cross-sectional area can be used, and the tension member 2 can be strongly connected to the anchor metal piece 4 by a plurality of bolts 6. As a result, they work together to accurately transmit the tensile force acting on the tension member 2 to the anchor metal piece 4, and effectively to the segment 1 from the anchor metal piece 4 through the plurality of properly arranged anchor streaks 5. It can be dispersed and absorbed. Therefore, it is possible to reduce the number of attached tension members 2 as compared with the prior art. Further, according to the mounting structure of this embodiment, even if the positions of the segments 1 facing each other are displaced, and the mounting position of the tension member 2 is displaced, the area of the anchor metal 4 is increased. Therefore, the tension member 2 can be easily attached.

Next, FIG. 5 is a front view of a main part showing another embodiment of the present invention, and FIGS. 6 and 7 are views taken along arrows c and d of FIG. 5, respectively.

In the embodiments shown in FIGS. 5 to 7, the tension member mounting portion 3 provided inside the segment 1 is formed in an inverted trapezoidal shape when viewed from the upper surface or the lower surface, and is formed in a trapezoidal shape when viewed from the side surface. Has been done.

The anchor metal piece 4 is formed in an inverted trapezoidal shape similar to the shape of the tension member attachment portion 3 when viewed from the upper surface or the lower surface, and the side surface shape is formed in a rectangle to be inserted into the tension member attachment portion 3. Has been done.

Other configurations of the embodiment shown in FIGS. 5 to 7 are the same as those of the embodiment shown in FIGS. 1 to 4, and the operation is also the same.

The attachment structure of the present invention is not limited to the segment having a substantially elliptical shape shown in FIG. 1, but can be applied to a segment having a circular shape or an arched rectangular shape.

[0022]

[Effect of device]

 As described above, in the present invention, the anchor metal member 4 for attaching the tensile member is embedded in the tensile member attachment portion 3 of the segment 1 for the shield tunnel, and the anchor metal member 4 is embedded in the segment 1 and The anchor metal 5 is integrated with the segment 1 through the anchor bar 5, and the end of the tension member 2 is connected to the anchor metal 4 with the bolt 6, so that the anchor metal 4 having a large area can be used. It is possible to integrate the segment 1 and the anchor metal piece 4 strongly by increasing the number of them and to arrange them properly, and also to use a tensile member 2 with a wide cross-sectional area. Along with the fact that the member 2 can be strongly connected with a plurality of bolts 6, the tensile force acting on the tensile member 2 is accurately transmitted to the anchor metal 4, and From hardware 4, dispersed in segments 1 through anchor muscles 5 a plurality of which are properly positioned, the effect capable of absorbing.

[Brief description of drawings]

FIG. 1 is a front view showing a state in which a tension member is attached to a segment according to the attachment structure of the present invention.

FIG. 2 is an enlarged view of a part of FIG. 1 and is a front view of a main part of an embodiment of the present invention.

FIG. 3 is a view on arrow a of FIG.

FIG. 4 is a view on arrow b in FIG.

FIG. 5 is a front view of an essential part of another embodiment of the present invention.

6 is a view on arrow c in FIG.

FIG. 7 is a view on arrow d in FIG.

[Explanation of symbols]

 1 Segment for shield tunnel 2 Tensile member 3 Tensile member attachment part 4 Anchor metal 5 Anchor bar 6 Bolt for attaching tension member

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takeichi Homma 1-24-4 Shinkawa, Chuo-ku, Tokyo Inside Daihoken Construction Co., Ltd. (72) Hirohide Hashimoto 2-6-21 Yaesu, Chuo-ku, Tokyo Ishikawajima Building Materials Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. An anchor metal piece 4 for attaching a tension member is embedded in a tension member attachment portion 3 of a segment 1 for a shield tunnel, and the anchor metal article 4 is inserted through a plurality of anchor lines 5 embedded in the segment 1. An attachment structure for a tensile member of a shield segment, characterized in that the tensile member 2 is integrated with the segment 1 and the end of the tensile member 2 is connected to the anchor metal piece 4 with a bolt 6.