Segment assembly apparatus and segment assembly method

Abstract

To realize a segment assembly device capable of supplying segments.SOLUTION: A segment assembly device that can be used for tunnel construction using a shield construction method includes a plurality of support devices 10 that can support segments 101, a rotation device 20 that can rotate in the circumferential direction of the tunnel being constructed, and a supply device capable of supplying the segments 101 to the support device 10. The plurality of support devices 10 is fixed to the rotation device 20 and rotatably moved in the circumferential direction of the tunnel as the rotation device 20 rotates. After a segment 101 is supplied to one support device 10, when a segment 101 is supplied to another support device, the rotation device 20 is rotated to retract the one support device 10 and align the other support device 10 with the supply device.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a segment assembling device and a segment assembling method that can be used for constructing a tunnel by the shield method.

Background Art

[0002] When constructing a tunnel such as a sewer, the shield method is widely used. In the shield method, generally, a method is adopted in which a shield machine is used to dig forward in the ground and segments are assembled at the excavated locations to form a tunnel wall surface.

[0003] The device used in the shield method needs to perform the intended work in a limited space in the ground. For example, Japanese Patent Laid-Open No. 4-269300 (Patent Document 1) discloses a segment assembling device that can assemble a plurality (six in this document) of pre-prepared segments simultaneously.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, Patent Document 1 only considered assembling multiple pre-prepared segments into a single ring, and did not consider supplying segments to the segment assembly device or detaching the segment assembly device from the ring after it had been formed. Therefore, when using the segment assembly device of Patent Document 1, manual work or other measures were required separately when supplying and attaching segments to the segment assembly device, and when detaching the ring from the segment assembly device. In this respect, there was room for improvement, considering the characteristics of the shield tunneling method in which excavation and wall formation proceed simultaneously.

[0006] Therefore, there is a need to realize a segment assembly device and segment assembly method that can supply segments. [Means for solving the problem]

[0007] The segment assembly device according to the present invention is a segment assembly device that can be used for tunnel construction using the shield tunneling method, An attachment that is mounted on a segment, and which is connectable to the said attachment, Multiple support devices capable of supporting the segment, and a rotating device that can rotate in the circumferential direction of the tunnel under construction, It is connectable to the aforementioned attachment, The system comprises a supply device capable of supplying the segments to the support devices, wherein a plurality of the support devices are fixed to the rotating device and are configured to rotate in the circumferential direction of the tunnel as the rotating device rotates, and with respect to one support device One After supplying the segment, to other support devices other When supplying a segment, the rotating device is rotated to retract the first support device and align the other support device with the supply device. Then, the attachment connected to the other segment is connected to the other support device. It is characterized by operating in such a way.

[0008] Furthermore, the segment assembly method according to the present invention is An attachment that is mounted on a segment, and which is connectable to the said attachment, Multiple support devices capable of supporting the segment, and a rotating device that can rotate in the circumferential direction of the tunnel under construction, A supply device that can be connected to the attachment and can supply the segment to the support device,A segment assembly method for tunnel construction using the shield tunneling method, which is carried out using a segment assembly device comprising a plurality of support devices fixed to the rotating device and configured to rotate in the circumferential direction of the tunnel as the rotating device rotates, comprising the steps of attaching an attachment to the segment, The supply device A step of supplying one segment to one support device, and a step of rotating the rotating device to retract the one support device that supports the one segment, A step of aligning the other support device with the supply device, and the supply device The method is characterized by including the steps of supplying other segments to other support devices and connecting the attachment connected to the other segments to the other support devices.

[0009] With these configurations, when supplying segments sequentially, preceding segments can be moved out of the way so as not to obstruct the path of subsequent segments, thus enabling segment supply even in tunnels where space is limited.

[0010] Preferred embodiments of the present invention will be described below. However, the scope of the present invention is not limited by the examples of preferred embodiments described below. In one embodiment, the segment assembly apparatus according to the present invention has a support device having a first groove portion capable of accommodating the attachment, and a supply device having a second groove portion capable of accommodating the attachment, and it is preferable that when aligning the other support device and the supply device, the first groove portion of the other support device and the second groove portion of the supply device are aligned.

[0011] In one embodiment of the segment assembly apparatus according to the present invention, it is preferable that the support device is provided as a lifting device capable of pushing up the segment.

[0012] This configuration allows the support device to be used as an erector that can sequentially install multiple segments. Therefore, it improves installation efficiency.

[0013] In one embodiment, the segment assembly apparatus according to the present invention preferably further comprises a synchronization device capable of synchronizing the operation of a plurality of the aforementioned push-up devices.

[0014] This configuration allows for fine-tuning of the relative positions of multiple segments, making it easier to ensure the ring is completed correctly.

[0015] In one embodiment, the segment assembly apparatus according to the present invention is provided with three support devices, the three support devices are fixed to the rotating device at 120° intervals, and it is preferable that the rotation of the rotating device allows the support devices to change their orientation between a first orientation in which the surface supporting the segment is substantially horizontal, a second orientation moved 120° in a predetermined direction from the first orientation, and a third orientation moved 240° in a predetermined direction from the first orientation.

[0016] This configuration is an optimized version of the present invention for shield tunneling methods using three divided segments.

[0017] In one embodiment of the segment assembly apparatus according to the present invention, it is preferable that the support devices are configured such that when segments are sequentially supplied to each of the three support devices, one or two segments supplied earlier retract the segments supplied later.

[0018] This configuration allows the present invention to be applied even in the construction of tunnels with relatively small inner diameters.

[0019] In one embodiment, the segment assembly apparatus according to the present invention is preferably such that the push-up device, as a support device, can support the segment in a position in which the support of the segment is released when the push-up device is driven while the segment is fixed.

[0020] With this configuration, for example, the position in which the lifting device supports the segment can be changed to a position in which the support of the segment can be released by pushing the segment with a jack, thus enabling smoother construction.

[0021] In one embodiment, the segment assembly method according to the present invention preferably further includes the steps of assembling a ring consisting of a plurality of segments, and releasing the support of the segments by the support device after the ring has been assembled.

[0022] According to this configuration, it is possible to assemble a ring composed of the segments after supplying the segments in a tunnel with limited space.

[0023] Further features and advantages of the present invention will become clearer from the following description of exemplary and non-limiting embodiments described with reference to the drawings.

Brief Description of the Drawings

[0024] [Figure 1] It is a schematic diagram showing the state of tunnel construction. [Figure 2] It is a cross-sectional view of an arc-shaped segment and a wall unit. [Figure 3] It is a top view of an arc-shaped segment. [Figure 4] It is a side view of a construction device according to an embodiment. [Figure 5] It is a side view of a lifting device and a rotating device according to an embodiment. [Figure 6] It is a front view of a pushing-up device and a rotating device according to an embodiment. [Figure 7] It is a top view of a support member according to an embodiment. [Figure 8] It is a diagram showing the positional relationship between a tilt lever and an abutting member according to an embodiment. [Figure 9] It is a diagram showing the positional relationship between a tilt lever and an abutting member according to an embodiment. [Figure 10] It is a side view of a supply device according to an embodiment. [Figure 11] It is a top view of a supply device according to an embodiment. [Figure 12] It is a side view of an attachment according to an embodiment. [Figure 13] It is a top view of an attachment according to an embodiment. [Figure 14] It is a front view showing the usage state of an attachment according to an embodiment.

Modes for Carrying Out the Invention

[0025] Embodiments of the segment assembly device according to the present invention will be described with reference to the drawings. Below, an example will be described in which the segment assembly device according to the present invention is applied to a construction device 1 used for the construction of a tunnel 100.

[0026] [Configuration of the shield tunneling method using three divided segments] First, the general configuration of the tunnel 100 constructed using the construction device 1 according to this embodiment and the shield tunneling method used to construct the tunnel 100 will be described. In this embodiment, a shield tunneling method using three segmented holes is employed. In this shield tunneling method, the tunnel 100 is formed by fixing the horizontal hole excavated by the shield machine S with a cylindrical wall unit 102 formed by combining three arc-shaped segments 101 (hereinafter simply referred to as "segment 101") (Figure 1).

[0027] The shield machine S is electrically connected to a control room R located on the ground and excavates the ground in a cylindrical shape at the leading edge of the tunnel construction line. Behind the shield machine S, two trolleys C1 and C2 are positioned, and the construction device 1 according to this embodiment is distributed and mounted on trolleys C1 and C2. Furthermore, segments are assembled into a cylindrical ring shape on the inner wall surface of the tunnel excavated in a cylindrical shape by the construction device 1, and trolleys C1 and C2 are configured to travel on a track (not shown) laid on the segments inside the tunnel 100.

[0028] (Definition of terms related to direction) In the following explanation, the term "tunnel extension direction" may be used to refer to the direction along the extension direction of tunnel 100. The "tunnel extension direction" of the construction device 1 and segment 101 refers to the direction along the extension direction of tunnel 100 when the construction device 1 and segment 101 are in use or after installation. Similarly, the terms "inside tunnel," "outside tunnel," "radial direction of tunnel," and "circumferential direction of tunnel" all refer to the inside, outside, radial, and circumferential directions, respectively, based on their positional relationship with tunnel 100 during use or after installation. The front-rear direction is defined according to the direction of travel of the shield machine S. In addition, when referring to the rotational direction related to the circumferential direction of tunnel, it will be expressed as clockwise or counterclockwise when viewed from the front to the rear in the direction of travel of the shield machine S.

[0029] (Segment and tunnel configuration) Segment 101 is a reinforced concrete block having a 120-degree arc-shaped cross-section (Figures 2 and 3). In this embodiment, the finished inner diameter of tunnel 100 is 1000 mm, and correspondingly, the inner surface of segment 101 is an arc shape with a diameter of 1000 mm. The thickness of segment 101 in the radial direction of the tunnel is 70 mm, and the outer surface of the tunnel is an arc shape with a diameter of 1140 mm. The length of segment 101 in the tunnel extension direction is 600 mm.

[0030] A projection 103 is provided at one end of the segment 101 in the circumferential direction of the tunnel, and a groove 104 is provided at the other end. Two segments 101 can be connected by engaging the projection 103 of one of the segments 101 with the groove 104 of the other segment 101 that is adjacent to the other in the circumferential direction of the tunnel. By connecting three segments 101 using this substructure, a cylindrical wall unit 102 can be formed.

[0031] A projection 105 is provided at one end of segment 101 in the direction of tunnel extension, and a groove 106 is provided at the other end. By engaging the projection 105 (or groove 106) of a previously completed wall surface with the groove 106 (or projection 105) of an adjacent completed wall surface, two adjacent wall units 102 can be connected in the direction of tunnel extension.

[0032] A sealant is injected into both the connecting portions (referred to as joints) between the segments 101 and between the wall units 102. Known materials such as epoxy resin-based caulking can be used as the sealant.

[0033] A through-hole 107 is provided in the center of segment 101 (center in the circumferential direction of the tunnel and center in the tunnel extension direction). The through-hole 107 is an opening used as an injection port when injecting backfill material between the inner surface of the lateral hole excavated by the shield machine S and the outer surface of the tunnel of segment 101 after the installation of segment 101. The through-hole 107 is provided with a female thread, and after the backfill material has been injected, a cap can be screwed onto the through-hole 107 to close the injection port.

[0034] [Configuration of the construction equipment] The construction apparatus 1 according to this embodiment includes three lifting devices 10 (first lifting device 10A, second lifting device 10B, and third lifting device 10C) (an example of multiple support devices) that can push up the segment 101, a rotating device 20 that can rotate the three lifting devices 10 in the circumferential direction of the tunnel, and a supply device 30 that can supply the segment 101 to the lifting devices 10 (Figure 4). In addition, an attachment 40 that can be connected to the lifting devices 10 and the supply device 30 is attached to the segment 101. The attachment 40, as well as the support members 11 and tilt levers 15 of the lifting devices 10, constitute the segment gripping device H.

[0035] The three push-up devices 10 are mounted on the body portion 21 of the rotating device 20 at equal intervals in the circumferential direction. The operation of the rotating device 20 allows the three push-up devices 10 to be moved in the circumferential direction. Hereinafter, the position in which the outer surface of the tunnel of the push-up device 10 (support member 11) is horizontal will be referred to as the first position, the position moved 120° clockwise from the first position will be referred to as the second position, and the position moved another 120° clockwise from the second position (a position moved 240° clockwise from the first position) will be referred to as the third position.

[0036] (Configuration of the lifting device) The push-up device 10 includes a support member 11 that functions as the main body supporting the segment 101, a hydraulic cylinder 12 capable of supplying power to move the support member 11 in the radial direction of the tunnel, a first connecting member 13 that connects the support member 11 and the rod 12a of the hydraulic cylinder 12, and a second connecting member 14 that connects the support member 11 and the body portion 21 of the rotating device 20 (Figures 5 to 7).

[0037] The support member 11 is a roughly plate-shaped member that functions as the main body supporting the segment 101 (supporting the weight of the segment 101). A groove portion 111 into which the attachment 40 can be fitted is provided in the central part of the support member 11 in the circumferential direction of the tunnel. The rear end 111a of the groove portion 111 is open, and the front end 111b is closed. Engaging projections 111c that engage with the housed attachment 40 are provided on the upper surfaces (outside the tunnel) of the ends 111a and 111b of the groove portion 111. Furthermore, the width of the opening of the groove portion 111 is narrower than the width of the bottom of the groove portion 111 (in the circumferential direction of the tunnel), and the wall surface from the bottom to the opening is formed as a gently curved surface. The shape of this curved surface follows the curved shape of the upper surface of the attachment 40 (details will be described later).

[0038] When the rotating device 20 is operated to position one of the three push-up devices 10 (first push-up device 10A, second push-up device 10B, or third push-up device 10C) in the first position, the groove portion 111 of the support member 11 of the push-up device 10 in the first position and the groove portion 32 of the supply device 30 form a continuous groove. The segment 101 supplied from the supply device 30 to the push-up device 10 (support member 11) is received by the support member 11 with the attached attachment 40 entering from the end portion 111a of the groove portion 111. A proximity sensor is installed at the end portion 111b, which can detect whether or not the attachment 40 is fitted into a predetermined position in the groove portion 111.

[0039] A rubber roller 112 is rotatably attached in the front-rear direction to the circumferential end portion of the support member 11 in the tunnel direction. The rubber roller 112 plays a role in assisting the forward movement of the segment 101 by rotatably supporting the inner surface of the segment 101 in the tunnel when the attachment 40 enters the groove portion 111.

[0040] The hydraulic cylinder 12 is the drive part of the lifting device 10 and is installed so as to be able to extend and retract along the direction of tunnel extension. The rod 12a of the hydraulic cylinder 12 is connected to the support member 11 via a first connecting member 13. The first connecting member 13 is divided into a first link 13a connected to the rod 12a and a second link 13b connecting the first link 13a to the support member 11. The first link 13a and the second link 13b are fastened together so as not to move relative to each other and are integrally pivotally supported on the body portion 21 of the rotating device 20. In addition, the end of the second link 13b on the support member 11 side is pivotally supported on the lower surface of the support member 11.

[0041] When the hydraulic cylinder 12 retracts, the portion of the first link 13a connected to the rod 12a is pulled forward, causing the first link 13a to rotate clockwise around the axis X1. In conjunction with this, the second link 13b rotates clockwise around the axis X1, causing the support member 11 to move outward (upward) from the tunnel. This movement pushes the segment 101 supported by the support member 11 upward (outward) from the tunnel. Conversely, when the hydraulic cylinder 12 moves forward, the support member 11 moves inward (downward) from the tunnel.

[0042] The second connecting member 14 is a member that connects the support member 11 and the body portion 21 of the rotating device 20. The connecting portions at both ends are pivotally supported and rotatable. The second connecting member 14 operates subordinately in accordance with the movement of the hydraulic cylinder 12.

[0043] Of the three lifting devices 10, the first lifting device 10A and the second lifting device 10B are equipped with tilt levers 15. The tilt levers 15 are pivotally supported by sharing a second link 13b and shaft X2. The first lifting device 10A has one tilt lever 15 (15A, 15B) attached to each side in the tunnel circumferential direction, while the second lifting device 10B has one tilt lever 15 (15C) attached to only one side in the tunnel circumferential direction (Figures 8 and 9). The tilt levers 15 are also provided on the side opposite to the side on which the support member 11 supports the segment 101.

[0044] One tilt lever 15A of the first push-up device 10A is positioned to contact the contact member 34 (34A) of the supply device 30 when the first push-up device 10A is in the second position (Figure 8). The other tilt lever 15B of the first push-up device 10A is positioned to contact the contact member 34 (34B) of the supply device 30 when the first push-up device 10A is in the third position (Figure 9). The tilt lever 15C of the second push-up device 10B is positioned to contact the contact member 34 (34A) of the supply device 30 when the second push-up device 10B is in the second position (Figure 9). However, when neither tilt lever 15 is in contact with the contact member 34, it assumes a position that does not interfere with the support member 11. Furthermore, when the first push-up device 10A is in the third position, the second push-up device 10B is in the second position, and therefore, when the tilt lever 15B contacts the contact member 34B, the tilt lever 15C simultaneously contacts the contact member 34A.

[0045] When the tilt lever 15 comes into contact with the contact member 34, the tilt lever 15 rotates clockwise around axis X2. At this time, one end 151 of the tilt lever 15 on the support member 11 side pushes the support member 11 outwards from the tunnel. This movement occurs only on the side of the support member 11 where the tilt lever is located, so only one side of the support member 11 is pushed outwards from the tunnel. As a result, the support member 11 tilts with respect to the tunnel's radial direction. More specifically, the upper portion of segment 101A in the second position is pushed outwards from the tunnel and retracts, creating more space above segment 101A on the tunnel's inner side, allowing other segments 101B supplied from the supply device 30 to pass through (Figure 8). Also, because more space is created above segment 101A on the tunnel's inner side, segment 101A and segment 101B do not interfere with each other when pushing other segments 101B upwards from the tunnel. The series of operations described above will be referred to as the "tilt mechanism" in the following explanation. Similarly, when inserting the third segment 101C, the tilt mechanism is also activated to retract one side of the previously inserted segments 101A and 101B, creating space for the third segment 101C to pass through and rise (Figure 9).

[0046] Furthermore, the support member 11 is configured to assume a position approximately perpendicular to the tunnel radial direction when one end 151 of the tilt lever 15 is not in contact with it. Specifically, two springs (not shown) are provided to bias the support member 11 from both sides in the tunnel circumferential direction, and the balance of the elastic forces of the two springs maintains the support member 11 in a position approximately perpendicular to the tunnel radial direction. When the tilt lever 15 pushes one side of the support member 11, it applies a stress that goes against the balance of these two springs.

[0047] Furthermore, an adjustment cylinder 16 (an example of a synchronization device) is provided that allows the three push-up devices 10 to operate in conjunction. The adjustment cylinder 16 is connected to the cylinder heads 12b of the three hydraulic cylinders 12. When the adjustment cylinder 16 extends, the three hydraulic cylinders 12 move forward. In relation to the support member 11, the forward movement of the hydraulic cylinders 12 is equivalent to the hydraulic cylinders 12 retracting. Therefore, when the adjustment cylinder 16 extends, the support member 11 moves outward from the tunnel. However, unlike the operation of a single hydraulic cylinder 12, when the adjustment cylinder 16 extends, the three hydraulic cylinders 12 move simultaneously, so the three support members 11 operate simultaneously. In other words, the operation of the three push-up devices 10 is synchronized. This allows for simultaneous fine adjustment of the positions of the three segments 101.

[0048] (Configuration of the rotating device) The rotating device 20 includes a body portion 21 that supports the three push-up devices 10, and a hydraulic motor that can rotate the body portion 21 in the circumferential direction of the tunnel. By operating the hydraulic motor to rotate the body portion 21, the circumferential position of the three push-up devices 10 can be changed, and in particular, the three push-up devices 10 can be positioned in one of the first, second, or third positions.

[0049] (Configuration of the supply device) The supply device 30 includes a main body portion 31, a groove portion 32 provided on the upper surface of the main body portion 31, a pair of left and right guide arms 33 (33A, 33B) configured to extend forward from the main body portion 31, contact members 34 (34A, 34B) attached to the guide arms 33, and stopper members 35 (35A, 35B) attached to the guide arms 33.

[0050] A groove 32 is provided in the central part of the main body 31 in the circumferential direction of the tunnel. The groove 32 is shaped to allow the attachment 40 to be fitted into it. The segment 101 is supported by the supply device 30 in such a manner that the attached attachment 40 is housed in the groove 32.

[0051] A rubber roller 311 is rotatably mounted in the front-rear direction on the circumferential end portion of the main body portion 31 in the tunnel direction. The rubber roller 311 rotates and supports the inner surface of the segment 101 in the tunnel when the attachment 40 moves in the front-rear direction along the groove portion 32, thereby assisting the front-rear movement of the segment 101.

[0052] The guide arm 33 is a component that pushes the segment 101 into the push-up device 10 (support member 11) in the first position from the tip of the main body portion 31. When the push-up device 10 is in the first position, the groove portion 111 of the support member 11 of the push-up device 10 and the groove portion 32 of the supply device 30 form a continuous groove, so that the attachment 40 can move continuously from the groove portion 32 to the groove portion 111. When the guide arm 33 is extended forward from the main body portion 31, the stopper member 35 comes into contact with the segment 101, and the segment 101 is pushed forward. At this time, the attachment 40 is housed in the groove portion 111, and the segment 101 is supported by the push-up device 10. In this way, the segment 101 can be supplied from the supply device 30 to the push-up device 10 by the operation of the guide arm 33.

[0053] The contact member 34 is a member fixed to the guide arm 33 and extends outward from the guide arm 33 (in the direction away from the main body portion 31). When the guide arm 33 is extended forward from the main body portion 31, the contact member 34 comes into contact with the tilt lever 15, causing the tilt lever 15 to rotate around axis X2. As described above, the support member 11 tilts when the tilt lever 15 rotates. Therefore, the tilt mechanism operates in conjunction with the movement of the guide arm 33 extending forward from the main body portion 31. This allows, for example, the support member 11 of the first push-up device 10A to tilt in conjunction with the operation of supplying the segment 101 to the second push-up device 10B, creating space for the segment 101 to enter and rise. Similarly, in conjunction with the operation of supplying the segment 101 to the third push-up device 10C, the support members 11 of the first push-up device 10A and the second push-up device 10B can be tilted to create space for the segment 101 to enter and rise.

[0054] The stopper member 35 is a member fixed to the guide arm 33, and when not subjected to stress, it extends diagonally upward from the guide arm 33. The stopper member 35 is configured to maintain an upright position (extending diagonally upward from the guide arm 33) when subjected to stress from front to rear, while it adopts a tilted position (tilted position) when subjected to stress from rear to front.

[0055] When the guide arm 33 is extended forward from the main body portion 31, the stopper member 35 comes into contact with the rear portion of the segment 101. At this time, the stopper member 35 receives a stress from the segment 101 that is directed from front to rear, so that the upright position is maintained. As a result, the segment 101 is pushed forward by the stopper member 35 and moves forward together with the guide arm 33.

[0056] On the other hand, if we try to move the segment 101, which is behind the stopper member 35, to a position in front of the stopper member 35, the stopper member 35 will come into contact with the front portion of the segment 101. At this time, the stopper member 35 receives a stress from the segment 101 moving from rear to front, causing it to change its orientation to a tilted position. As a result, the stopper member 35 does not hinder the forward movement of the segment 101.

[0057] (Attachment configuration) The attachment 40 has a main body portion 41 and a threaded portion 42 (Figures 12-14). The threaded portion 42 has a male thread that can be screwed into the female thread formed in the through hole 107 of the segment 101. By screwing the male thread of the threaded portion 42 into the female thread of the through hole 107, the attachment 40 can be attached to the segment 101.

[0058] The main body portion 41 is formed with a curved shape on its upper surface (Figure 14). Both ends of the main body portion 41 in the front-rear direction are provided with protruding portions 43 that project in the circumferential direction of the tunnel, and the central part of the main body portion 41 in the front-rear direction is provided with a recessed portion 44 that is recessed in the circumferential direction compared to the protruding portions 43. When the attachment 40 is accommodated in the groove portion 111 of the support member 11 of the push-up device 10, the engaging projection 111c of the groove portion 111 and the protruding portion 43 are aligned, thereby preventing the attachment 40 from falling out of the groove portion 111.

[0059] After the three segments 101 are combined to form the wall unit 102, the shield jack (not shown) provided on the shield machine S is operated to push the wall unit 102 backward. At this time, the attachment 40 moves backward relative to the support member 11, so the positions of the protrusion 43 of the attachment 40 and the engaging projection 111c of the support member 11 are misaligned. Since the width of the groove portion 111 in the part where the engaging projection 111c is not provided is wider than the width of the part of the attachment 40 that has the protrusion 43, in this state the attachment 40 can be detached from the support member 11 (push-up device 10).

[0060] [Structure of the construction method] Next, a method for constructing a tunnel 100 using the construction apparatus 1 according to this embodiment will be described. Prior to construction, three segments 101 (101A, 101B, 101C) are supported on the supply device 30, and an attachment 40 is attached to each segment 101. The three push-up devices 10 are also aligned such that the first push-up device 10A is in the first position, the second push-up device 10B is in the third position, and the third push-up device 10C is in the second position.

[0061] First, the first segment 101A is supplied to the first push-up device 10A. Then, the hydraulic cylinder 12 of the first push-up device 10A is retracted, moving the segment 101A toward the outside of the tunnel. Subsequently, the rotating device 20 is operated to change the orientation of the first push-up device 10A (an example of a support device) from the first position to the second position, thereby retracting the first push-up device 10A and the first segment 101A. At this time, the second push-up device 10B changes orientation to the first position.

[0062] Secondly, the second segment 101B is supplied to the second push-up device 10B (which is the other support device when the first push-up device 10A is considered one support device). At this time, the guide arm 33 moves forward and the contact member 34A contacts the tilt lever 15A, so the tilt mechanism is activated (Figure 8). As a result, the upper part of segment 101A moves out of the path of segment 101B, creating space for segment 101B supplied from the supply device 30 to pass and rise. After that, the hydraulic cylinder 12 of the second push-up device 10B is retracted to move segment 101B toward the outside of the tunnel. Then, the adjustment cylinder 16 is extended or retracted to move segments 101A and 101B simultaneously to fine-tune their relative positions. Next, the rotating device 20 is operated to change the orientation of the second push-up device 10B (here, an example of a support device) from the first orientation to the second orientation, and the second push-up device 10B and the second segment 101B are retracted. At this time, the third push-up device 10C changes orientation to the first orientation, and the first push-up device 10A changes orientation to the third orientation.

[0063] Thirdly, the third segment 101C is supplied to the third push-up device 10C (which is the other support device when the second push-up device 10B is considered one support device). At this time, the guide arm 33 moves forward, and the contact members 34A and 34B come into contact with the tilt levers 15C and 15B, respectively, so the tilt mechanism is activated (Figure 9). As a result, the upper parts of segments 101A and 101B move out of the path of segment 101C, creating space for segment 101C supplied from the supply device 30 to pass and rise. After that, the hydraulic cylinder 12 of the third push-up device 10C is retracted, and segment 101C is moved toward the outside of the tunnel.

[0064] Fourth, the adjustment cylinder 16 is extended or retracted to simultaneously move segments 101A, 101B, and 101C, causing them to advance and retract simultaneously in the radial direction of the tunnel. This advance and retraction action engages the projection 103 with the groove 104, connecting the segments 101. This operation completes the cylindrical wall unit 102. This wall unit 102 is completed in a position forward of the existing wall unit 102, and a gap exists between the completed wall unit 102 and the existing wall unit 102 immediately after completion.

[0065] Fifth, the shield jacks (not shown) provided on the shield machine S are operated to push the newly completed wall unit 102 backward, causing it to come into contact with the existing wall unit 102. In other words, the gap between the newly completed wall unit 102 and the existing wall unit 102 is eliminated. At this time, as the newly completed wall unit 102 moves backward, the attachment 40 moves backward relative to the support member 11, causing a misalignment between the protrusion 43 of the attachment 40 and the engaging projection 111c of the support member 11.

[0066] Finally, the hydraulic cylinders 12 of the three lifting devices 10 are all extended to move the three support members 11 toward the inside of the tunnel. When the hydraulic cylinders 12 are extended, the support members 11 move in an arc-shaped trajectory in correspondence with the rotation of the second link 13b around axis X1. At this point, as described above, the alignment between the protruding portion 43 and the engaging projection 111c is released, so the engaging projection 111c of the support member 11 can pass through the retracted portion 44 of the attachment 40. As a result of this operation, the attachment 40 detaches from the support member 11, leaving the wall unit 102 and the three attachments 40 on the tunnel 100 side. After that, the attachments 40 are removed from the wall unit 102, and backfill material is injected through the through hole 107. The subsequent procedures are the same as in conventional shield tunneling methods, so the explanation is omitted.

[0067] [Other Embodiments] Finally, other embodiments of the segment assembly apparatus and segment assembly method according to the present invention will be described. Note that the configurations disclosed in each of the following embodiments can be applied in combination with configurations disclosed in other embodiments, provided that no inconsistencies arise.

[0068] In the above embodiment, a configuration in which a push-up device 10 having a hydraulic cylinder 12 is provided as a support device was described as an example. However, in the segment assembly apparatus according to the present invention, a support device other than a hydraulic cylinder (for example, an air cylinder or a screw-type telescopic device) may be provided, and a support device without a drive unit may also be adopted.

[0069] In the above embodiment, a configuration in which three lifting devices 10 are provided was described as an example, but the number of support devices in the segment assembly device according to the present invention is not limited as long as there are multiple support devices. The number of support devices depends on the number of segments divided into segments used in the shield tunneling method employed.

[0070] In the above embodiment, an adjustment cylinder 16 was provided, and a configuration was described as an example in which the operation of the three push-up devices 10 can be synchronized. However, in the segment assembly apparatus according to the present invention, the presence or absence of a synchronization device is optional.

[0071] In the above embodiment, a configuration in which a tilt lever 15 is provided and a tilt mechanism is realized was described as an example. However, in the segment assembly apparatus according to the present invention, it is optional whether or not a mechanism is implemented that allows a previously supplied segment to retract a later supplied segment.

[0072] With regard to other configurations, the embodiments disclosed herein are illustrative in all respects, and it should be understood that the scope of the present invention is not limited thereto. Those skilled in the art will readily understand that modifications can be made as appropriate without departing from the spirit of the invention. Therefore, other embodiments modified without departing from the spirit of the invention are naturally included within the scope of the present invention. [Industrial applicability]

[0073] This invention can be used, for example, in the construction of tunnels using the shield tunneling method. [Explanation of Symbols]

[0074] 1: Construction equipment 10: Push-up device 11: Support member 111:Groove part 111a: End of groove section (rear side) 111b: End of groove (front side) 111c: Engagement protrusion 112: Rubber roller 12: Hydraulic Cylinder 12a: Rod 12b: Cylinder head 13: First connecting member 13a: First Link 13b: Second link 14: Second connecting member 15: Tilt lever 151: One end of the tilt lever 16: Adjustment Cylinder X1 :Axis X2 :axis 20: Rotating device 21: Body part 30: Feeding device 31: Main body part 311: Rubber roller 33: Guide Arm 34: Contact member 35: Stopper component 40: Attachment 41: Main body part 42: Screw part 43:Protruding part 44: Retirement Department H: Segment gripping device 100: Tunnel 101: Arc-shaped segment (segment) 102: Wall Unit 103: Protrusion (circumferential direction of the tunnel) 104: Groove section (circumferential direction of the tunnel) 105: Protrusion (in the direction of tunnel extension) 106: Groove section (in the direction of tunnel extension) 107: Through hole S: Shield Machine C1: Trolley C2: Trolley R: Control Room

Claims

1. A segment assembly device that can be used for tunnel construction using the shield tunneling method, Attachments that are fitted to the segment, Multiple support devices that can be connected to the aforementioned attachment and that can support the aforementioned segment, A rotating device that can rotate in the circumferential direction of the tunnel under construction, A supply device that is connectable to the attachment and capable of supplying the segment to the support device, Multiple support devices are fixed to the rotating device and are configured to rotate in the circumferential direction of the tunnel as the rotating device rotates. A segment assembly device that, after supplying one segment to one support device, operates to retract the first support device and align the other support device with the supply device, thereby connecting the attachment connected to the other segment with the other support device.

2. Each of the support devices has a first groove portion capable of accommodating the attachment, The supply device has a second groove portion capable of accommodating the attachment, The segment assembly apparatus according to claim 1, wherein when aligning the other support device and the supply device, the first groove portion of the other support device and the second groove portion of the supply device are aligned.

3. The segment assembly apparatus according to claim 1, wherein the support device is provided as a lifting device capable of pushing up the segment.

4. The segment assembly apparatus according to claim 3, further comprising a synchronization device capable of synchronizing the operation of a plurality of the aforementioned push-up devices.

5. Three of the aforementioned support devices are provided, The three support devices are fixed to the rotating device at 120° intervals. The rotation of the rotating device causes the support device to move A first posture in which the surface supporting the segment is approximately horizontal, A second posture obtained by moving 120° in a predetermined direction from the first posture, A third posture is obtained by moving 240° in a predetermined direction from the first posture, A segment assembly device according to any one of claims 1 to 4, which can change its posture over a wide range.

6. The segment assembly apparatus according to claim 5, wherein when the segments are sequentially supplied to each of the three support devices, the support devices are configured such that one or two segments supplied earlier retract the segments supplied later.

7. The segment assembly apparatus according to claim 3 or 4, wherein the push-up device, as a support device, can assume a position in which the support of the segment is released when the push-up device is driven with the segment fixed.

8. A segment assembly method for tunnel construction by shield tunneling, which is carried out using a segment assembly apparatus comprising: an attachment to be mounted on a segment; a plurality of support devices connectable to the attachment and capable of supporting the segment; a rotating device that can rotate in the circumferential direction of the tunnel under construction; and a supply device connectable to the attachment and capable of supplying the segment to the support devices, wherein the plurality of support devices are fixed to the rotating device and are configured to rotate in the circumferential direction of the tunnel as the rotating device rotates, The process involves attaching an attachment to the aforementioned segment, The process of the supply device supplying one segment to one support device, A step of rotating the rotating device to retract the support device that supports the first segment, A step of aligning the other support device with the supply device, A segment assembly method comprising the steps of supplying another segment to the other support device using the supply device, and connecting the attachment connected to the other segment to the other support device.

9. A step of assembling a ring consisting of multiple segments, The segment assembly method according to claim 8, further comprising the step of releasing the support of the segment by the support device after assembling the ring.

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