Method for attaching and removing thrust receiving material in shield construction method and thrust receiving material in shield construction method

Abstract

To provide a method for attaching and removing thrust receiving materials in a shield construction method, which can shorten construction time by utilizing a gripping and transporting mechanism for attaching and removing the thrust receiving materials.SOLUTION: A method of the present invention comprises the steps of: attaching a thrust receiving material 20, which is divided so as to be portable, to a mounting member 40 that integrates a plurality of sets, when attaching and removing the thrust receiving material 20 that supports a thrust force associated with excavation between flexible segment frames 10; assembling the thrust receiving material 20 together with the mounting member 40 between the flexible segment frames 10; gripping the flexible segment frame 10 with a gripping and transporting mechanism and connecting it annularly between segments S; removing the thrust receiving material 20 together with the mounting member 40 from the flexible segment frame 10 using the gripping and transporting mechanism; placing a water cut-off rubber member 30 between the removed flexible segment frames 10; gripping the removed mounting member 40 with the gripping and transporting mechanism and reattaching the thrust receiving material 20; and repeating these steps.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a method for attaching and detaching a thrust receiving member in a shield method and a thrust receiving member in a shield method.

Background Art

[0002] In a tunnel constructed by the shield method, in order to prevent damage due to earthquakes, temperature changes, uneven settlement of the ground, etc., a flexible segment having a flexible portion provided with an expandable and contractible water stop rubber member for absorbing the displacement of the tunnel is provided at one location or a plurality of locations at predetermined intervals in the central axis direction of the tunnel. The flexible segment is, for example, one disclosed in Patent Document 1, and an expandable and contractible water stop rubber member is provided between a pair of annularly connected frame members facing each other with a space therebetween to impart flexibility.

[0003] In the process of annularly connecting a pair of frame members, the flexible segment connects the opposing frame members to each other with a thrust receiving member so that they can be assembled as a rigid body. After being assembled annularly, the thrust receiving member is removed, and the water stop rubber member is annularly arranged and attached between the opposing frame members. Then, in the annular flexible segment to which the water stop rubber member is attached, the thrust receiving member is attached again so that it can receive thrust in preparation for the next excavation. When the influence of the thrust accompanying the excavation disappears, the thrust receiving member is removed, and it is brought into a state where flexibility is imparted.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the flexible segments of the conventional shield method, in order to attach the waterstop rubber member, it is necessary to temporarily remove the thrust receiving member that obstructs the work from the opposing frame member. The thrust receiving member weighing about 20 kg is removed one by one manually, the waterstop rubber member is attached, and then the thrust receiving member is attached again manually. For this reason, there are problems such as a large number of bolts being detached and attached for the removal and reattachment of the thrust receiving member, which takes a great deal of construction time and places a heavy burden on the workers. This problem becomes even more serious when the outer diameter is large.

[0006] The present invention has been made in view of the above problems of the prior art, and an object thereof is to provide a method for attaching and detaching a thrust receiving member of a shield method and a thrust receiving member of a shield method that can shorten the construction time by using a gripping and transporting mechanism for attaching and detaching the thrust receiving member.

Means for Solving the Problems

[0007] When attaching and detaching a thrust receiving member that supports the thrust accompanying tunneling between flexible segment frames having a flexible waterstop rubber member axially opposed and annularly connected between segments divided in the circumferential direction of the tunnel to be shield-driven and annularly connected, attach the removably divided thrust receiving members to attachment members that are integrated in multiple sets, assemble the thrust receiving members together with the attachment members between the flexible segment frames, and then grip the flexible segment frames with a gripping and transporting mechanism and connect them annularly between the segments; repeating the steps of gripping and removing the thrust receiving members of the flexible segment frames together with the attachment members with the gripping and transporting mechanism, installing the waterstop rubber member between the removed flexible segment frames, and gripping and reattaching the removed thrust receiving members together with the attachment members with the gripping and transporting mechanism; characterized in that, in the thrust release state after the completion of tunneling, the individual thrust receiving members and the attachment members are separated and removed.

[0008] It is preferable that an ejector for gripping and transporting the segment is used as the gripping and transporting mechanism.

[0009] It is preferable to provide a guide member for guiding the attachment and detachment in the radial direction along the circumferential direction between the flexible segment frame and the attachment member.

[0010] It is preferable that the thrust receiving member is composed of side receiving members on both axial sides and a central receiving member, and the contact surfaces of each other are guide surfaces for guiding the attachment and detachment.

[0011] It is preferable that the central receiving member is divided so that a wedge member can be attached and detached between the divided surfaces.

[0012] It is preferable that the central receiving member is attached so as to sandwich the attachment member on both sides of the attachment member, thereby integrating a plurality of central receiving members.

[0013] It is preferable that a wedge member can be attached and detached between one of the central receiving members attached to both sides of the attachment member and the attachment member.

[0014] The thrust receiving member of the shield method of the present invention for achieving the above object is a thrust receiving member of the shield method that is attached and detached to a flexible segment frame of a flexible segment that connects segments connected in a ring shape in the axial direction of the tunnel, and is respectively attached and detached to both axial sides of the flexible segment frame. Side receiving members, a central receiving member that is attached and detached to each of the side receiving members attached to both sides of the flexible segment frame, and extends in the circumferential direction of the tunnel, and a plurality of central receiving members are integrated by attaching the central receiving members to both sides. An attachment member that can be attached to the side receiving member, and the contact surface between the side receiving member and the central receiving member is a guide surface for guiding the attachment and detachment.

[0015] Further provided is a gripping portion that is gripped by a gripping and transporting mechanism for transporting the flexible segment, and to which the attachment members are attached on both sides in the circumferential direction. When the gripping portion is lifted by the gripping and transporting mechanism, it preferably has a protruding portion that contacts an end portion of the attachment member to suppress the sagging of the attachment member.

Advantages of the Invention

[0016] According to the present invention, by using a gripping and transporting mechanism for attaching and detaching a thrust receiving member, the construction time can be shortened.

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Embodiments for Carrying Out the Invention

[0018] Hereinafter, Embodiment 1 of the present invention will be described with reference to the drawings. In the following description, the axial direction of the tunnel is A, the circumferential direction is C, and the radial direction is R.

[0019] The method for attaching and detaching the thrust receiving member of the shield method of the present invention is as follows: when attaching and detaching the thrust receiving member 20 that supports the thrust accompanying tunneling between the flexible segment frames 10 having flexibility, the thrust receiving member 20 that is divided into portable parts is attached to the attachment members 40 integrated in a plurality of sets, and after assembling the thrust receiving member 20 together with the attachment members 40 between the flexible segment frames 10, the flexible segment frames 10 are gripped by an erector (gripping and transporting mechanism, the same applies hereinafter) E and annularly connected between the segments S; and the thrust receiving member 20 of the flexible segment frames 10 is gripped and removed by the erector E together with the attachment members 40, a water stop rubber member 30 is installed between the removed flexible segment frames 10, and the removed attachment members 40 are gripped by the erector E and the thrust receiving member 20 is attached again repeatedly. The method is configured to separate and remove the individual thrust receiving members 20 and attachment members 40 in the thrust release state after tunneling is completed. With such a configuration, the thrust receiving member 20 for supporting the thrust accompanying tunneling with the water stop rubber member 30 attached can be attached and detached by using the erector E that grips, transports, and assembles the segments from the previous manual work, so that the construction time can be shortened, for example, it can be shortened by about 40%.

[0020] The following describes each process of constructing the segments of the shield tunnel by the shield method including the present invention. In the shield tunnel T by the shield method (hereinafter may be simply referred to as tunnel T), as shown in FIG. 10, (general) segments S made of reinforced concrete or the like are annularly assembled on the inner surface of the tunnel T excavated by the shield machine M and are axially connected in the axial direction A as the primary construction as tunneling progresses. To prevent damage to this shield tunnel T due to earthquakes, temperature changes, uneven settlement of the ground, etc., a flexible segment 1 having a flexible part is provided at one location (in the illustrated example) or at a plurality of locations at predetermined intervals or the like in the axial direction A of the tunnel T by interposing a water stop rubber member 30 that can absorb displacement of the tunnel T and ensure water tightness. As the general segment S, the same ones as before are used, and there is no particular limitation such as being made of reinforced concrete or steel.

[0021] As shown in FIG. 1, the flexible segment 1 of the shield method (hereinafter simply referred to as the flexible segment) is composed of a pair of frame members (flexible segment frame bodies) 10 facing each other in the axial direction A, a thrust receiving member 20 connecting the inner peripheral sides of the frame members 10, and a water stop rubber member 30 connected to the outer peripheral sides of the frame members 10. Finally, the thrust receiving member 20 is removed. As shown in FIG. 1, the pair of frame members 10 is composed of arc-shaped outer frame plates 11 in which a pair of respective frame members 10 facing each other in the axial direction A are divided in the circumferential direction C, inner frame plates 12 on the inner side, and skin plates 13 on the outer peripheral side connecting them to form a substantially horizontal F shape, and end plates 14 attached to both ends in the circumferential direction C. The outer frame plate 11 has a wide width from the outer peripheral end (width in the radial direction R), the inner frame plate 12 has a small width from the outer peripheral end (width in the radial direction R), and they are formed in an arc shape with the same curvature. The skin plate 13 on the outer peripheral side is arranged substantially flush without protruding from the outer frame plate 11, and the opposite side is arranged to protrude in the axial direction A from the inner frame plate 12. The two (a pair) of opposing frame members 10 are arranged with the skin plate 13 on the outer peripheral side, and the outer frame plate 11 and the inner frame plate 12 are arranged to face each other in the axial direction A, and there is a gap between the inner frame plates 12 and between the skin plates 13. Further, the outer peripheral side of the skin plate 13 is covered with a cover plate 15. Between the inner frame plates 12, after the frame members 10 are annularly connected (the flexible segments are annularly assembled), a water stop rubber member 30 that imparts flexibility to the frame members 10 is attached. Also, the end plates 14 are connected by segment connection bolts overlapping with the end plates 14 of the frame members 10 adjacent in the circumferential direction C, so that the flexible segment 1 can be connected in the circumferential direction C to form the flexible segment 1 in an annular shape.

[0022] As shown in Fig. 1, the thrust receiving member 20 is of a portable size and weight that can be attached and detached by manual work or using general-purpose mechanisms, such as lifters and robot arms, in the final process. A plurality of them, for example, five pieces divided in the axial direction A between the outer frame plates 11 are connected and attached with bolts and nuts. Also, in the circumferential direction C, as shown in Fig. 2 for example, by arranging a plurality of sets of five pieces connected in the axial direction A at predetermined intervals, the thrust receiving member 20 can be firmly connected to the pair of frame members 10 as a rigid body. Thereby, the thrust accompanying the excavation of the tunnel T can be received between the frame members 10. As shown in Figs. 1 and 2, the thrust receiving member 20 includes side receiving members 21 on both axial sides and two central receiving members 22 between the side receiving members. By interposing a wedge member 23 between the two central receiving members 22, it is configured in a set of five pieces so that assembly and separation can be facilitated by the inclined surfaces 21a, 22a, and 23a on the split surface. Note that the thrust receiving member 20 is not limited to the case where the contact surfaces with the wedge member 23 are inclined surfaces 22a and 23a as in the case of being configured by attaching the wedge member 23 between the two central receiving members 22 as shown in Figs. 1 and 2. It can also be configured so that the contact surfaces 21a and 22a between the side receiving member 21 and the central receiving member 22 are inclined surfaces, enabling smooth assembly and separation. Moreover, as long as the thrust receiving member 20 can be attached between the outer frame plates 11 and receive the thrust accompanying the excavation in the axial direction A, the number of axial divisions (five in the illustrated example) and the shape of the contact surface (inclined surface), etc. are not limited to the above configuration. Like the thrust receiving member according to Embodiment 2 shown in Fig. 12, the contact surfaces between the side receiving member 21 and the central receiving member 22 are vertical surfaces 21b and 22b, and by using the wedge member 23 of the central receiving member 22 for assembly and separation, the structure can be simplified and production can be facilitated.

[0023] As shown in Fig. 1, in the flexible segment 1, a space is secured between the inner frame plates 12 on the outer peripheral side of the thrust receiving member 20 to attach a water stop rubber member 30 that ensures water tightness and imparts flexibility between the frame members 10. As shown in Fig. 1(a), the thrust receiving member 20 is attached when assembling the flexible segment 1 at the factory, and is accurately positioned and connected by a pair of frame members 10 that are connected with an interval in the axial direction A. Thereby, the flexible segment 1 can be easily and highly accurately positioned for connection with a general segment S adjacent in the axial direction A.

[0024] When attaching the water stop rubber member 30 to the flexible segment 1, it is necessary to remove the thrust receiving member 20 that obstructs the work. For example, two central receiving members 22 and wedge members 23 are removed (see Fig. 1(b)). In the present invention, instead of the conventional manual work or work using a general-purpose mechanism, the removal of the central receiving member 22 and the wedge member 23 and the reattachment after attaching the water stop rubber member 30 can be performed using an erector E (see Figs. 8 and 11) to shorten the construction time. Therefore, for attaching the thrust receiving member 20 between the frame members 10 of the flexible segment 1, as shown in Fig. 2, a plurality of sets, for example, five sets of thrust receiving members 20 arranged in the circumferential direction C are integrated by an attachment member 40 for attachment and removal.

[0025] As shown in Fig. 2, the attachment member 40 integrates a plurality of sets, for example, five sets of thrust receiving members 20 (in this embodiment, only the central receiving member 22 and the wedge member 23) in the circumferential direction C. Therefore, a pair of two attachment members 40 are arranged to face each other before and after in the axial direction A of the central receiving member 22. The attachment member 40 is formed in an arc-shaped plate shape with the same curvature as the frame member 10 of the flexible segment 1, and fixing bolt holes 41 for the frame member 10 are formed at both ends, for example, two each. It can be fixed by the four fixing bolt holes 41, and in this embodiment, it is connected and fixed to the side receiving members 21 on both sides. Between the two attachment members 40, five sets are attached at equal intervals in the circumferential direction C with the wedge member 23 attached between the central receiving members 22.

[0026] (1) Assembly process of the flexible segment at the factory When assembling the flexible segment 1 at the factory, the thrust receiving member 20 first attaches five sets of central receiving members 22 and wedge members 23 between the inner surfaces using a pair of mounting members 40 facing each other in the axial direction A. Further, as shown in FIGS. 1 and 2, etc., five sets of side receiving members 21 are attached to the outer surface side in the axial direction A sandwiching the mounting members 40 to integrate the five sets of thrust receiving members 20. And in the flexible segment 1, as shown in FIGS. 3 to 5 and FIG. 11, the frame member 10 attaches two mounting members 40 integrating five sets of thrust receiving members 20, and further attaches one set of thrust receiving members 20 between them, which is composed of 11 sets, for example, as the basic flexible segment 1, so as to reduce the connection points when assembling annularly and improve the assembly efficiency. On the other hand, the flexible segment 1A at the final connection point is made small with only one mounting member 40 integrating five sets of thrust receiving members 20 as shown in FIGS. 10 and 11, so that assembly and positioning can be easily performed.

[0027] (2) Connection process of the flexible segments 1 and 1A to the general segment S In this way, the flexible segments 1 and 1A are transported into the shield tunnel T. When attaching the flexible segments 1 and 1A to the general segment S, the third or sixth thrust receiving member 20 of the mounting member 40 is removed, the gripping portion 50 by the erector E is attached, and it is attached to the general segment S via the erector E and assembled by connecting annularly. The connection of the flexible segments 1 and 1A to the general segment S of the excavated shield tunnel T is performed by connecting the erector E to the gripping portion 50 between the two mounting members 40 of the flexible segment 1 to connect the flexible segments 1 to each other. In the last space, the third set of thrust receiving members 20 of the mounting member 40 of the small flexible segment 1A is removed to serve as the gripping portion 50, and the erector E is connected for assembly.

[0028] The thrust receivers 20 (21 to 23) that have been divided into portable pieces in the above process are attached to the attachment members 40 that integrate a plurality of them. After assembling the thrust receivers 20 together with the attachment members 40 between the frame members (flexible segment frames) 10, the frame members 10 are gripped by the erector E and connected annularly between the segments S. Note that the attachment of the thrust receivers 20 to the flexible segment 1 is not limited to the case where five sets of the thrust receivers 20 in the illustrated example are integrated by one attachment member 40 and two attachment members 40 are attached. Depending on the size of the flexible segment 1 and the capacity of the erector E, it is also possible to configure it by arranging a larger number of sets (an odd number is preferably for weight balance) of the thrust receivers 20 in the circumferential direction C on one attachment member 40. In this embodiment, an odd number of sets of the central receivers 22 and wedge members 23 are attached to the attachment members 40 to ensure weight balance with the erector E. In the flexible segment 1 composed of two attachment members 40, one set of thrust receivers 20 is additionally installed between the two to ensure weight balance, and the thrust receivers 20 are configured with 11 sets.

[0029] (3) Process of attaching the water stop rubber member to the annular flexible segment The process of attaching the water stop rubber member 30 to the annularly connected flexible segments 1, 1A is performed. That is, the thrust receivers 20 (22, 23) of the frame member 10 are removed by gripping them with the erector E together with the attachment member 40. The water stop rubber member 30 is installed between the removed frame members 10, and the process of gripping the removed attachment member 40 with the erector E and attaching the thrust receivers 20 (22, 23) again is repeated.

[0030] In the flexible segments 1, 1A (see FIGS. 10 and 11), as shown in FIG. 1, in order to attach the water stop rubber member 30, it is necessary to remove the five sets of the central receivers 22 and wedge members 23 that are integrated by the attachment member 40 among the thrust receivers 20. First, the central receivers 22 and wedge members 23 of the third set from the center among the five sets are replaced with the gripping part 50 by the erector E (see FIG. 4).

[0031] 3-2) Next, connect the gripping portion 50 to the erector E, remove eight bolts, four on one side and four on both sides, from the fixing bolt holes 41 that fix the attachment member 40, and remove the remaining four sets together with the attachment member 40 (see Fig. 4 etc.).

[0032] 3-3) In this way, while forming a space partially with one attachment member 40 between the frame members 10 of the flexible segment 1, attach the water stop rubber member 30 by attaching the anchoring portions 31 at both ends to the inner frame plate 12 of the frame member 10 (see Fig. 1(b) and Fig. 5).

[0033] 3-4) After attaching the water stop rubber member 30, reattach the thrust receiving member 20 together with the attachment member 40. To facilitate the reattachment of the attachment member 40, attach guide plates 60 for guiding the tip of the attachment member 40 to both ends on the frame member 10 side (see Fig. 5 and Fig. 6). In the present embodiment, the frame member 10 side is attached as a guide surface 61 in which a plate-like guide plate 60 is inclined so that the width in the circumferential direction C becomes narrower toward the outside in the radial direction R so as to span between the side receiving members 21 (see Fig. 1 and Figs. 5 to 8). Guide portions 42 formed by notches that become narrower toward the outside in the radial direction R are formed at both ends of the attachment member 40, and are guided to a predetermined position by being pushed into contact with the guide surface 61 of the guide plate 60. Note that the formation of the guide plate 60 on the frame member 10 and the installation of the guide portion 42 on the attachment member 40 are not necessarily required, but the work can be efficiently performed in a short time by these.

[0034] 3-5) After reattaching the thrust receiving member 20 together with the attachment member 40, remove the guide plate 60 and replace the removed thrust receiving member 20 with the gripping portion 50 of the erector E.

[0035] (3 - 6) While repeatedly performing partial removal of the thrust receiving member 20 integrated by the attachment member 40 by such an erector E, partial attachment of the water stop rubber member 30, and reattachment of each attachment member 40 of the thrust receiving member 20, the water stop rubber member 30 is connected in a ring shape, and the primary construction is completed by reattaching the thrust receiving member 20 by the attachment member 40 at this connection portion (see FIGS. 9 and 10).

[0036] In this shield method, as shown in FIGS. 10 and 11, taking as an example the case where seven flexible segments 1 with two attachment members 40 with five thrust receiving members 20 in a set and one flexible segment 1A with only five thrust receiving members 20 in a set attached to the attachment member 40 are configured to be annularly assembled with a total of eight flexible segments 1, 1A, the number of flexible segments 1 to be made annular may be appropriately determined according to the size of the shield tunnel T, not limited to this.

[0037] After the primary construction is completed, tunneling is performed by the shield machine M. After the tunneling is completed, secondary construction is carried out. In the secondary construction, since the erector E installed in the shield machine M cannot be used, the removal of the thrust receiving member 20 will be carried out manually or by a lifter or robot arm of a general-purpose mechanism as before. The removal of the thrust receiving member 20 in this manual operation utilizes the inclined surfaces 22a, 23a of the wedge members 23 between the central receiving members 22 to remove it and release the fixed state due to the thrust. After that, the central receiving member 22 and the attachment member 40 in the axial direction A are removed, and further the side receiving member 21 is removed and separated. By repeating these operations and separating and removing all the thrust receiving members 20 and the attachment members 40, the flexibility and water stopping property of the water stop rubber member 30 are ensured, and it can function as the flexible segments 1, 1A.

[0038] Next, Embodiment 3 of the present invention will be described with reference to FIGS. 13 to 16. In this embodiment, as shown in FIG. 13, a mounting member 140 that integrates a plurality of thrust receiving members 120 is provided between a first central receiving member 122 and a second central receiving member 123 (collectively referred to as the central receiving members 122 and 123), which is different from the configuration of Embodiment 1 in which mounting members 40 are provided on both sides of the central receiving member 22. On the other hand, the configurations other than the central receiving members 122 and 123 and the mounting member 140, that is, the configurations of the flexible segment frame 10, the side receiving member 21, the water stop rubber member 30, etc., are common to both embodiments. Therefore, the common configurations are denoted by the same reference numerals, and the description thereof will be omitted as appropriate.

[0039] As shown in FIGS. 13 and 14, a part of the thrust receiving member 120 is integrated as a thrust receiving member unit 130 via the mounting member 140 and is attached to and detached from the flexible segment frame 10. The thrust receiving member unit 130 includes a first central receiving member 122 and a second central receiving member 123 arranged at intervals in the axial direction A, a mounting member 140 adjacent to the first central receiving member 122 in the axial direction A, a wedge member 110 inserted between the mounting member 140 and the second central receiving member 123, and a gripping portion 150 (FIG. 14) connected to an end portion of the mounting member 140 in the circumferential direction C.

[0040] The basic configuration of the first central receiving member 122 has the same configuration as the central receiving member 22 on the left side of Fig. 1(a). That is, as shown in Figs. 13 and 14, the first central receiving member 122 has a first side wall portion 122a and a second side wall portion 122b arranged to face each other in the axial direction A, a connecting wall portion 122c connecting the end edges of the first side wall portion 122a and the end edges of the second side wall portion 122b, a partition wall portion 122d, and a handle portion 122e (Fig. 14). As shown in Fig. 15(b), the first side wall portion 122a is formed such that the inner intersection angle θ1 with the connecting wall portion 122c is, for example, 90 degrees. The second side wall portion 122b is formed such that the inner intersection angle θ2 with the connecting wall portion 122c is, for example, 95 degrees. In the first side wall portion 122a and the second side wall portion 122b formed in this way, the distance between them in the axial direction A increases as they approach the center in the radial direction R. The partition wall portion 122d connects the inner surfaces of the first side wall portion 122a, the second side wall portion 122b, and the connecting wall portion 122c that form a U-shaped cross section. As shown in Fig. 14, the handle portion 122e is formed by bending a rod-shaped member into a substantially U shape and is attached to both surfaces of the partition wall portion 122d.

[0041] The basic configuration of the second central receiving member 123 also has the same configuration as the central receiving member 22 on the right side of Fig. 1(a). That is, as shown in Figs. 13 and 14, the second central receiving member 123 has a first side wall portion 123a and a second side wall portion 123b arranged to face each other in the axial direction A, a connecting wall portion 123c connecting the end sides of the first side wall portion 123a and the second side wall portion 123b, a partition wall portion 123d, and a handle portion 123e (Fig. 14). As shown in Fig. 15(b), the first side wall portion 123a is formed such that the inner intersection angle θ3 with the connecting wall portion 123c is, for example, 80 degrees. The second side wall portion 123b is formed such that the inner intersection angle θ4 with the connecting wall portion 123c is, for example, 95 degrees. In the first side wall portion 123a and the second side wall portion 123b formed in this way, the distance between them in the axial direction A decreases as they approach the center in the radial direction R. The partition wall portion 123d connects the inner surfaces of the first side wall portion 123a, the second side wall portion 123b, and the connecting wall portion 123c that form a U-shaped cross section. As shown in Fig. 14, the handle portion 123e is formed by bending a rod-shaped member into a substantially U shape and is attached to both sides of the partition wall portion 123d. Note that the specific numerical values of the intersection angles θ1 to θ4 are merely examples, and appropriate values can be adopted.

[0042] The attachment member 140 is an arc-shaped plate member extending in the circumferential direction C. As shown in Fig. 15(a), two pairs of paired central receiving members 122 and 123 are provided on the attachment member 140, and a gripping portion 150 is connected to one end thereof. The attachment member 140 is formed with insertion holes (not shown) for two mounting bolts 161 for one pair of central receiving members 122 and 123, and insertion holes (not shown) for two mounting bolts 162 for the gripping portion 150. The insertion holes (not shown) for the mounting bolts 161 are formed side by side in the circumferential direction C. The insertion holes (not shown) for the mounting bolts 162 are formed side by side in the radial direction R. As shown in Fig. 14, two attachment members 140 are provided at intervals in the circumferential direction C with respect to one thrust receiving member unit 130. A gripping portion 150 is connected between these two attachment members 140. The attachment member 140 protrudes from the central receiving members 122 and 123 at both ends of the thrust receiving member unit 130, and a guide portion 142 corresponding to the guide portion 42 in Fig. 2(b) is formed on the protruding portion.

[0043] The wedge member 110 is a member corresponding to the wedge member 23 in Fig. 1(a). The wedge member 110 is mounted between the attachment member 140 and the first side wall portion 123a of the second central receiving member 123 as shown in Fig. 15(b). The attachment member 140 in contact with one surface of the wedge member 110 is in contact with the first side wall portion 122a perpendicular to the axial direction A. On the other hand, the first side wall portion 123a of the second central receiving member 123 in contact with the other surface of the wedge member 110 forms an angle of θ3 = 80 degrees with respect to the axial direction A. As can be understood from the geometric relationship shown in Fig. 15(b), the tip angle θ5 of the wedge member 110 is 10 degrees.

[0044] As shown in Fig. 15(b), the bolt 161 penetrates through the first side wall portion 122a of the first central receiving member 122, the attachment member 140, the wedge member 110, and the first side wall portion 123a of the second central receiving member 123 and is tightened. Thereby, the first central receiving member 122, the wedge member 110, and the second central receiving member 123 are attached to the attachment member 140 and integrated.

[0045] The gripping part 150 is a member that is gripped by the electer E (Fig. 8) of the integrated thrust receiving member unit 130. Specifically, in order to attach the water stop rubber member 30, as described with reference to Fig. 8, the gripping part 150 is gripped when the integrated thrust receiving member unit 130 is attached and detached. As shown in Figs. 14 and 15(a), the gripping part 150 includes a cylindrical main body part 151 that is gripped by the electer E, plate-shaped first side wall part 152 and second side wall part 153 provided at respective ends of the main body part 151, and first joint part 154 and second joint part 155 that protrude from the outer peripheral surface of the main body part 151 in opposite directions to each other.

[0046] The first joint part 154 is overlapped with the end 140a of one attachment member 140 of the thrust receiving member unit 130 and is connected by a bolt 162. Further, the first joint part 154 has a protruding part 154a that protrudes from the surface that contacts the attachment member 140. The protruding part 154a is formed adjacent to the end 140a of the attachment member 140 and has a shape that linearly extends in the radial direction R. The protruding part 154a contacts the end 140a of the attachment member 140 over the radial direction R.

[0047] The second joint part 155 is overlapped with the end 140a of the other attachment member 140 of the thrust receiving member unit 130 and is connected by a bolt 162. Further, the second joint part 155 has a protruding part 155a that protrudes from the surface that contacts the attachment member 140. The protruding part 155a is formed adjacent to the end 140a of the attachment member 140 and has a shape that linearly extends in the radial direction R. The protruding part 155a contacts the end 140a of the attachment member 140 over the radial direction R.

[0048] Since the thrust receiving member unit 130 is lifted around the gripping portion 150 by the erector E (FIG. 8), the attachment members 140 attached to both sides of the gripping portion 150 tend to hang down easily. Therefore, by bringing the end portion 140a of the attachment member 140 into contact with the protruding portions 154a and 155a in the radial direction R, it is possible to suppress the deformation and rotation in which the tip of the attachment member 140 tries to hang downward.

[0049] As shown in FIG. 16, two thrust receiving member units 130 and one gripping portion 50 are attached to the flexible segment frame 10. The gripping portion 50 is the same as the gripping portion 50 shown in FIG. 3(a). Such an assembly is performed at the factory as described above and then transported to the site. The attachment and detachment of the thrust receiving member unit 130 are performed via bolts 163 with respect to the inclined surface 21a of the side receiving member 21 attached to the flexible segment frame 10. Specifically, as shown in FIG. 13, when attaching the thrust receiving member unit 130, the second side wall portion 122b of the first central receiving member 122 and the second side wall portion 123b of the second central receiving member 123 are aligned with the inclined surface 21a of the side receiving member 21 provided on both sides of the flexible segment frame 10, and the first side wall portion 152 and the second side wall portion 153 of the gripping portion 150 are aligned, and the bolts 163 are tightened. On the other hand, the detachment of the thrust receiving member unit 130 is performed by releasing the fastening by the bolts 163. In this way, as shown in FIG. 14, the integrated thrust receiving member unit 130 has the side wall portions 122b, 123b, 152, and 153 that are aligned with the inclined surface 21a of the side receiving member 21 in a state of being separated from each other.

[0050] The construction method of the flexible segment in this embodiment is basically the same as the content in the above-mentioned (1) assembly process of the flexible segment in the factory, (2) connection process of the flexible segments 1 and 1A to the general segment S, and (3) attachment process of the water stop rubber member to the annular flexible segment. In this embodiment, when assembling the flexible segment in the factory, as shown in FIG. 14, the gripping portion 150 is arranged at the center of the thrust receiving member unit 130 incorporated in the flexible segment frame 10. However, as shown in FIG. 2 of the above-mentioned Embodiment 1, a thrust receiving member may also be arranged at the center and replaced with the gripping portion 150 when attaching the water stop rubber member 30.

[0051] As specifically described together with the embodiments above, the method for attaching and detaching the thrust receiving member of the shield tunneling method of the present invention is such that, between segments S that are divided in the circumferential direction C of the tunnel T to be shield-tunneled and connected annularly, and are opposed in the axial direction A and provided with a water stop rubber member 30 that is connected annularly and has flexibility, when attaching and detaching the thrust receiving members 20 and 120 that support the thrust accompanying tunneling between the flexible segment frames 10, the thrust receiving members 20 and 120 that are divided into portable parts are attached to the attachment members 40 and 140 that are integrated in a plurality of sets. After assembling the thrust receiving members 20 and 120 together with the attachment members 40 and 140 between the flexible segment frames 10, the flexible segment frames 10 are gripped by the erector E and connected annularly between the segments S. And the thrust receiving members 20 and 120 of the flexible segment frames 10 are gripped and removed by the erector E together with the attachment members 40 and 140. A water stop rubber member 30 is installed between the removed flexible segment frames 10, and the removed attachment members 40 and 140 are gripped by the erector E again to attach the thrust receiving members 20 and 120 back. It includes the steps of repeating, and is configured to separate and remove the individual thrust receiving members 20 and 120 and the attachment members 40 and 140 in the thrust release state after tunneling is completed. According to such a configuration, in the primary construction for installing the flexible segments 1 and 1A, by removing and reinstalling the thrust receiving members 20 and 120, multiple sets of the thrust receiving members 20 and 120 are integrated by the mounting members 40 and 140. Therefore, the multiple thrust receiving members 20 and 120 can be detached and attached in an integrated state, and the construction time can be significantly shortened compared to the case of attaching and detaching the central receiving members 22, 122, 123 and the wedge members 23 and 110 of the thrust receiving members 20 and 120 one by one. In the above Embodiments 1 and 2, the attachment and detachment of the multiple thrust receiving members 20 are performed via the bolts of the bolt holes 41 for fixing the mounting member 40. In Embodiment 3, the attachment and detachment of the multiple thrust receiving members 120 are performed via the bolts 163 that connect the side receiving member 21 and the central receiving members 122 and 123. Further, by attaching to the grippers 50 and 150 of the erector E, the thrust receiving members 20 and 120 together with the mounting members 40 and 140 can be removed and reinstalled, and the burden on the operator can be significantly reduced. Also, the removal of the thrust receiving members 20 and 120 in the final operation is to separate them by utilizing the inclined surfaces of the wedge members 23 and 110 between the central receiving members 22, 122, 123 to release the fixed state due to the thrust. After that, the central receiving members 22, 122, 123 and the mounting members 40 and 140 in the axial direction A are removed, and further the side receiving member 21 is removed. By repeating these operations to separate and remove all the thrust receiving members 20 and 120 and the mounting members 40 and 140 respectively, the flexibility and water stoppage performance of the water stop rubber member 30 are ensured, and it can function as the flexible segments 1 and 1A.

[0052] In the present invention, an erector E that grips and transports the segment S is used as the gripping and transporting mechanism. According to such a configuration, by using the erector E, the thrust receiving members 20 and 120 together with the mounting members 40 and 140 can be attached and detached without installing a new gripping and transporting mechanism, improving the construction efficiency and enabling short-time construction.

[0053] In the present invention, a guide plate 60 is provided between the flexible segment frame 10 and the mounting members 40, 140 to guide the attachment and detachment in the radial direction R along the circumferential direction C. According to such a configuration, alignment can be easily achieved when returning the thrust receiving members 20, 120 together with the mounting members 40, 140, improving the construction efficiency and enabling construction in a short time.

[0054] In the present invention, the thrust receiving members 20, 120 are composed of side receiving members 21 on both sides in the axial direction A and central receiving members 22, 122, 123, and the contact surfaces 21b, 22b with each other are guide surfaces for guiding attachment and detachment. According to such a configuration, separation and assembly of the thrust receiving members 20, 120 can be easily achieved, alignment becomes easy, construction efficiency is improved, and construction can be completed in a short time.

[0055] In the present invention, the central receiving members 22, 122, 123 are divided, and wedge members 23, 110 can be attached and detached between the divided surfaces (inclined surfaces 22a). According to such a configuration, separation and assembly of the thrust receiving members 20, 120 can be easily achieved by the divided surfaces 23a of the wedge members 23, 110 and the divided surfaces (inclined surfaces 22a) of the central receiving members 22, 122, 123, alignment becomes easy, construction efficiency is improved, and construction can be completed in a short time.

[0056] In the present invention, the central receiving members 122, 123 are attached so as to sandwich the mounting member 140 on both sides of the mounting member 140, thereby integrating the plurality of central receiving members 122, 123. According to such a configuration, a thrust receiving member unit 130 in which a plurality of central receiving members 122, 123 (thrust receiving members 120) are integrated can be assembled between flexible segment frames 10 via the central receiving members 122, 123 arranged on both sides of the mounting member 140. Therefore, the mutually separated inclined surfaces (side wall portions 122b, 123b, 152, 153 shown in FIG. 14) of the plurality of central receiving members 122, 123 and the inclined surface 21a of the side receiving member 21 can be easily aligned with each other, and the assembly work can be easily performed. Thereby, the workability can be improved.

[0057] Further, in the present invention, a wedge member 110 is attachable and detachable between one of the central receiving members 122 and the mounting member 140 among the central receiving members 122, 123 attached to both sides of the mounting member 140. According to such a configuration, the separation and assembly of the thrust receiving member 120 can be easily performed by the inclined surface of the wedge member 110 and the inclined surface of the central receiving member 122, alignment becomes easy, the construction efficiency is improved, and construction can be performed in a short time.

[0058] Further, the thrust receiving member of the shield method of the present invention is a thrust receiving member of the shield method that is attached to and detached from a flexible segment frame 10 of a flexible segment 1 that connects a segment S connected in a ring shape in the axial direction A of a tunnel T, and is attached to and detached from both side portions in the axial direction A of the flexible segment frame 10. Side receiving members 21, central receiving members 122, 123 that are attached to and detached from the respective side receiving members 21 attached to both side portions of the flexible segment frame 10, and extend in the circumferential direction C of the tunnel T, and central receiving members 122, 123 are attached to both sides. And a mounting member 140 that enables the plurality of central receiving members 122, 123 to be attached to the side receiving member 21 in an integrated state, and the contact surfaces of the side receiving member 21 and the central receiving members 122, 123 are guide surfaces that guide attachment and detachment. According to such a configuration, in a single construction process of installing the flexible segments 1 and 1A, by removing and reinstalling the thrust receiving member 120, a plurality of sets of the thrust receiving member 120 are integrated by the mounting member 140. Therefore, compared with the case of attaching and detaching the central receiving members 122 and 123 and the wedge members 110 of the thrust receiving member 120 one by one, the construction time can be significantly shortened. Further, the thrust receiving member unit 130 in which a plurality of central receiving members 122 and 123 (thrust receiving member 120) are integrated can be assembled between the flexible segment frames 10 via the central receiving members 122 and 123 arranged on both sides of the mounting member 140. Therefore, it is possible to easily align the inclined surfaces (side wall portions 122b and 123b shown in FIG. 14) of the plurality of central receiving members 122 and 123 that are separated from each other with the inclined surface 21a of the side receiving member 21, and the assembly of both can be easily performed. Thereby, the workability can be improved.

[0059] Further, in the present invention, the flexible segments 1 and 1A are further provided with a gripping and transporting mechanism (for example, an erector E) for gripping and transporting, and a gripping portion 150 to which the mounting members 140 are attached on both sides in the circumferential direction C. When the gripping portion 150 is lifted by the gripping and transporting mechanism (for example, an erector E), the gripping portion 150 has protruding portions 154a and 155a that come into contact with the end portion 140a of the mounting member 140 to suppress the sagging of the mounting member 140. According to such a configuration, when the thrust receiving member unit 130 is lifted, the sagging of the mounting member 140 is prevented, so that the displacement of the bolt holes for the mounting bolts is suppressed. Therefore, the mounting bolts can easily pass through the bolt holes, and the workability can be improved.

[0060] As described above, with the combination of the present invention, the removal and reattachment of the thrust receiving members 20 and 120 in the primary construction for installing the flexible segments 1 and 1A can be easily detached and attached with the thrust receiving members 20 and 120 integrated with the attachment members 40 and 140. Also, when attaching and detaching the thrust receiving members 20 and 120 one by one during the secondary construction, the disassembly and assembly are facilitated by the inclined surfaces 21a, 22a, and 23a of the side receiving members 21, the central receiving members 22, 122, and 123, and the wedge members 23 of the thrust receiving members 20 and 120. The construction time can be significantly shortened, and the burden on the workers can also be reduced.

[0061] As described above, the embodiments of the present invention have been described. However, the present invention is not limited to the above-described embodiments and can be appropriately modified without departing from the spirit thereof. Also, the specific structure of the thrust receiving member is not particularly limited, and those commonly used in shield tunnels can be used as they are. Similarly, the water stop rubber member is not particularly limited, and any configuration can be used as long as it has water stopping properties and flexibility. Also, it may be a case where secondary construction is not performed as the flexible segment of the shield method. Also, although the erector used for segment assembly is described as an example of the gripping and transporting mechanism, it is not limited to this, and other gripping and transporting mechanisms may be installed. As long as it is a mechanism that can grip and transport the thrust receiving member 20 together with the attachment member, it may be configured by a combination of a general-purpose lifter and a robot arm. Also, the general-purpose mechanism for attaching and detaching the separated thrust receiving members and attachment members is not limited to lifters and robot arms, and any mechanism suitable for the work may be used. Also, the protruding portions 154a and 155a for suppressing the sagging of the attachment member 140 are not limited to linear ones, and may be dot-shaped, or may be in a form where the protruding portions intersect at 90 degrees and contact the corner portions of the attachment member 140.

Explanation of Reference Numerals

[0062] 1... Flexible segment, 10... Frame member (flexible segment frame body), 11... Outer frame plate, 12... Inner frame plate, 13... Skin plate, 14... End plate, 15... Cover plate, 20... Thrust receiving member, 21... Side receiving member, 21a... Inclined surface (guide surface), 21b... Vertical surface (contact surface), 22... Central receiving member, 22a... Inclined surface (guide surface), 22b... Vertical surface (contact surface), 23... Wedge member, 23a... Inclined surface (split surface), 30... Waterstop rubber member, 31... Anchoring portion, 40... Mounting member, 41... Fixing bolt hole, 42... Guide portion, 50... Gripping portion, 60... Guide plate, 61... Guide surface, 110... Wedge member, 120... Thrust receiving member, 122... First central receiving member, 122a... First side wall portion, 122b... Second side wall portion, 122c... Connection wall portion, 122d... Partition wall portion, 122e... Handle portion, 123... Second central receiving member, 123a... First side wall portion, 123b... Second side wall portion, 123c... Connection wall portion, 123d... Partition wall portion, 123e... Handle portion, 130... Thrust receiving member unit, 140... Mounting member, 140a... End portion, 142... Guide portion, 150... Gripping portion, 151... Main body portion, 152... First side wall portion, 153... Second side wall portion, 154... First joint portion, 154a, 155a... Protrusion, 155... Second joint portion, 155a... Protrusion, 161, 162, 163... Bolt, E... Erector (gripping and transporting mechanism), S... Segment (general), M... Shield machine, T... Shield tunnel, A... Axial direction, C... Circumferential direction, R... Radial direction, θ1~θ4... Intersection angle, θ5... Tip angle.

Claims

1. When mounting and dismounting a thrust receiving member for supporting the thrust force accompanying excavation between flexible segment frames having flexibility and equipped with water-stopping rubber members that are annularly connected to axially opposed segments that are divided in the circumferential direction of a tunnel being excavated by a shield, a step of attaching the thrust-receiving members divided so as to be portable to an attachment member which integrates a plurality of sets, assembling the thrust-receiving members together with the attachment member between the flexible segment frames, and then gripping the flexible segment frames with a gripping and transporting mechanism to connect the thrust-receiving members in an annular shape between the segments; a step of gripping and removing the thrust-receiving member of the flexible segment frame together with the mounting member by the gripping and transporting mechanism, installing the water-stopping rubber member between the removed flexible segment frames, gripping and transporting the removed mounting member together with the gripping and transporting mechanism, and replacing the thrust-receiving member, After completion of excavation, in a thrust release state, the thrust receiving members and the mounting members are separated and removed individually. A method for attaching and removing thrust-receiving members in a shield construction method.

2. The gripping and transporting mechanism uses an erector that grips and transports the segments.

2. A method for attaching and detaching a thrust-receiving member in a shield tunneling method according to claim 1.

3. A guide member is provided between the flexible segment frame and the mounting member along the circumferential direction to guide mounting and removal in the radial direction.

2. A method for attaching and detaching a thrust-receiving member in a shield tunneling method according to claim 1.

4. The thrust receiving member is composed of side receiving members on both axial sides and a central receiving member, and their contact surfaces serve as guide surfaces for guiding attachment and removal.

2. A method for attaching and detaching a thrust-receiving member in a shield tunneling method according to claim 1.

5. The central support member is divided so that a wedge member can be attached and detached between the divided surfaces.

5. A method for attaching and detaching a thrust-receiving member in a shield construction method according to claim 4.

6. The central support member is attached to both sides of the mounting member so as to sandwich the mounting member, thereby integrating the multiple central support members.

5. A method for attaching and detaching a thrust-receiving member in a shield construction method according to claim 4.

7. A wedge member is attachable and detachable between one of the central receiving members attached to both sides of the mounting member and the mounting member. A method for attaching and detaching a thrust-receiving member in a shield construction method according to claim 6.

8. A thrust receiving member for a shield construction method that is attached to and detached from a flexible segment frame of a flexible segment that connects segments connected in an annular shape in the axial direction of a tunnel, a side support member that is attached to and detached from both sides of the flexible segment frame in the axial direction; a central support member that is attached to and detached from each of the side support members that are attached to both sides of the flexible segment frame; and an attachment member extending in the circumferential direction of the tunnel and attaching the central support members to both sides thereof, thereby allowing the central support members to be attached to the side support members in an integrated state; The contact surfaces between the side receiving members and the central receiving member are guide surfaces for guiding attachment and removal. A thrust-receiving material for shield construction.

9. The flexible segment is gripped by a gripping and transporting mechanism, and the mounting member is attached to both sides of the gripping portion in the circumferential direction. The gripping portion has a protrusion that contacts an end of the mounting member to suppress sagging of the mounting member when the gripping portion is lifted by the gripping and transporting mechanism. A thrust-receiving member for a shield construction method according to claim 8.

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