Internal structural material installation device

Abstract

To improve the work efficiency of installing internal structural materials inside a shield tunnel.SOLUTION: An internal structural material installation device 100 includes a pair of moving mechanisms 15 that are spaced from each other in the right-left direction of a shield tunnel T, a gate-shaped frame 22 that connects the pair of moving mechanisms 15, a hanging part 40 that can suspend internal structural materials, and a lifting part 60 that raises and lowers the hanging part 40 with respect to the frame 22. The frame 22 is provided with a guide part 30 that can guide the hanging part 40, which moves up and down as the internal structural material is lifted and lowered, along a plane perpendicular to the axial direction of the shield tunnel T.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to an internal structural material installation device.

Background Art

[0002] Patent Document 1 discloses an internal structural material installation device for installing precast internal structural materials in a shield tunnel.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The floor slab, which is a precast internal structural material installed in a shield tunnel by the internal structural material installation device described in Patent Document 1, is suspended via a wire wound up by a hoisting device, so the wire is suspended in a state along the direction of gravity. That is, since the floor slab is suspended along the direction of gravity regardless of the gradient of the shield tunnel, for example, when lowering the floor slab to the installation surface of the shield tunnel at a location with a relatively large gradient, it is necessary to perform operations such as tilting the suspended floor slab in accordance with the gradient of the installation surface of the shield tunnel and pressing it against the existing floor slab. Therefore, at locations with a relatively large gradient, there is a risk that the working efficiency of the operation of installing the floor slab in the shield tunnel will decrease.

[0005] An object of the present invention is to improve the working efficiency of the operation of installing internal structural materials in a shield tunnel.

Means for Solving the Problems

[0006] The present invention relates to an internal structural material installation device for installing precast internal structural materials in a shield tunnel, comprising: a pair of moving mechanisms arranged at intervals from each other in the left-right direction of the shield tunnel and capable of moving along the axial direction within the shield tunnel; a gate-shaped frame connecting the pair of moving mechanisms; a suspension section capable of suspending the internal structural materials; and a lifting section for raising and lowering the suspension section relative to the frame, wherein the frame is provided with a guide section capable of guiding the suspension section, which rises and falls in conjunction with the lifting and lowering of the internal structural materials, along a plane perpendicular to the axial direction of the shield tunnel. The frame comprises a pair of support structures arranged at intervals from each other in the left-right direction of the shield tunnel, and a beam member connecting the pair of support structures at the top. Each pair of support structures is separately provided with a first support section that supports the vertical component of the load acting on the guide section, and a second support section that supports the horizontal component of the load acting on the guide section. [Effects of the Invention]

[0007] According to the present invention, the work efficiency of installing internal structural materials inside a shield tunnel can be improved. [Brief explanation of the drawing]

[0008] [Figure 1] This is a cross-sectional view along the axial direction of a shield tunnel in which internal structural materials are installed by an internal structural material installation device according to an embodiment of the present invention. [Figure 2] This is a schematic diagram of the internal structural material installation device as viewed from the direction indicated by arrow A in Figure 1. [Figure 3] This is a cross-sectional view showing the cross-section along line BB in Figure 2. [Figure 4] This is a cross-sectional view showing a section along the CC line in Figure 3. [Figure 5] This is an enlarged view of the area around the restraint, as seen from the direction indicated by arrow D in Figure 3. [Figure 6] This is an enlarged view of the area indicated by arrow E in Figure 3. [Figure 7] This figure shows the state in which the internal structural material has been installed inside the shield tunnel using the internal structural material installation device according to an embodiment of the present invention, and is viewed from the same direction as Figure 2. [Figure 8] This is a schematic diagram of the internal structural material installation device as seen from the direction indicated by arrow F in Figure 1, showing the state in which the internal structural material has been installed inside the shield tunnel by the internal structural material installation device. [Modes for carrying out the invention]

[0009] The internal structural material installation device according to an embodiment of the present invention will be described below with reference to the drawings.

[0010] The internal structural material installation devices 100 and 200 according to the embodiment of the present invention are devices used when installing precast concrete internal structural materials inside a shield tunnel T. Below, we will describe the case in which the internal structural material installation devices 100 and 200 are used as devices for installing precast internal structural materials such as the lower member 16 and upper member 18 of a box culvert 19 inside a shield tunnel T.

[0011] Furthermore, the precast internal structural members installed in the shield tunnel T by the internal structural member installation devices 100, 200 are not limited to members constituting the box culvert 19, but may be any internal structural members installed in the shield tunnel T, for example, members other than the box culvert 19 that constitute the deck slab, or invert blocks installed on the bottom surface of the shield tunnel T.

[0012] First, with reference to Figure 1, the shield tunnel T in which the internal structural materials are installed by the internal structural material installation devices 100, 200, and the system for constructing the shield tunnel T will be described. The shield tunnel T is constructed by assembling the segment pieces 7, which will be described later, into the excavated shaft excavated in the ground (ground) by the shield tunneling machine 1. Figure 1 is a cross-sectional view along the axial direction of the shield tunnel T. In the following, the face side, which is the direction in which the shield tunneling machine 1 excavates, will be referred to as "front," the portal side, which is the opposite direction, as "rear," the right side of the shield tunnel T with respect to the direction of excavation of the shield tunneling machine 1 will be referred to as "right," and the left side of the shield tunnel T with respect to the direction of excavation of the shield tunneling machine 1 will be referred to as "left."

[0013] The shield tunneling machine 1 shown in Fig. 1 is an earth pressure shield tunneling machine used in the earth pressure shield method. It has a cylindrical outer shell (skin plate) 2, a cutter head 3 disposed at the front end of the outer shell 2 and rotatably supported by the outer shell 2, an erector 4 for assembling segment pieces 7, and a plurality of shield jacks 5 arranged at predetermined intervals in the circumferential direction inside the outer shell 2.

[0014] The erector 4 is capable of gripping the arc-shaped segment pieces 7 and is configured to be movable in the central axis direction and the circumferential direction of the outer shell 2 along the inner circumferential surface of the outer shell 2. By assembling a plurality of segment pieces 7 along the inner circumferential surface of the outer shell 2 by the erector 4, a cylindrical segment ring 8 is constructed.

[0015] The shield jack 5 is a hydraulic jack composed of a cylinder and a rod, and the tip of the rod is arranged to be able to abut against the side surface of the segment ring 8 assembled by the erector 4.

[0016] When the shield jack 5 is extended with the tip of the rod of the shield jack 5 abutting against the side surface of the segment ring 8, the cutter head 3 is pressed against the ground by the reaction force obtained from the segment ring 8. Thus, the shield tunneling machine 1 uses the reaction force obtained by the shield jack 5 pressing the existing segment ring 8 as the propulsion force for tunneling forward.

[0017] The shield tunneling machine 1 with the above configuration rotates the cutter head 3 to excavate the ground, takes in the earth and sand while excavating, and conveys it backward, and extends the shield jack 5 to tunnel. An excavation pit is excavated in the ground, and a shield tunnel T is constructed by sequentially assembling the segment ring 8 along the inner circumferential surface of the excavation pit.

[0018] Behind the shield tunneling machine 1 that constructs the shield tunnel T in this way, a segment supply device 10 that supplies segment pieces 7 to the erector 4 and a plurality of trailing bogies 20 (20A to 20D) are arranged. The segment supply device 10 and the trailing bogies 20 are connected to the shield tunneling machine 1 via a connecting beam (not shown) so as to move following the excavation of the shield tunneling machine 1. Note that the segment supply device 10 and the trailing bogies 20 may have a configuration that can travel within the shield tunnel T.

[0019] The segment supply device 10 is a device provided with a conveyor that conveys the segment piece 7 transported into the shield tunnel T by the transport bogie 12 toward the erector 4. A transport crane 14 that can transport the segment piece 7 placed on the loading platform of the transport bogie 12 to the loading part of the segment supply device 10 is provided on the first trailing bogie 20A arranged behind the shield tunneling machine 1.

[0020] The transport crane 14 is, for example, a hoist-type ceiling crane and is movable along a traveling rail 14a provided along the axial direction on the first trailing bogie 20A or along a traveling rail provided along the axial direction straddling the first trailing bogie 20A and the shield tunneling machine 1.

[0021] The trailing bogies 20 (20A to 20D) are used as a mount for a control device that controls the operation of the shield tunneling machine 1 and a power supply facility that supplies power to the shield tunneling machine 1.

[0022] In addition, the transport bogie 12 that transports the segment piece 7 transports the lower member 16 and the upper member 18 that constitute the box culvert 19 as internal structural materials installed in the shield tunnel T into the shield tunnel T together with the segment piece 7.

[0023] In order to install the internal structural materials transported by the transport trolley 12 into the shield tunnel T, the first trailing trolley 20A is equipped with a first internal structural material installation device 100 (internal structural material installation device) for installing the lower member 16 of the box culvert 19 into the shield tunnel T, and the second trailing trolley 20B, which is connected to the rear of the first trailing trolley 20A, is equipped with a second internal structural material installation device 200 (internal structural material installation device) for installing the upper member 18 of the box culvert 19 into the shield tunnel T.

[0024] In this case, if the internal structural members installed inside the shield tunnel T are suspended, for example, via wires that are hoisted up by a hoisting device, the internal structural members will be suspended in line with the direction of gravity. In other words, if they are simply suspended via wires, the internal structural members will be suspended in line with the direction of gravity regardless of the longitudinal gradient of the shield tunnel T.

[0025] As described above, the shield tunnel T is constructed almost parallel to the horizontal, but in some places the longitudinal gradient exceeds 5%. Therefore, when lowering the internal structural members suspended by wires in areas with a relatively large longitudinal gradient, it is necessary to tilt them to match the longitudinal gradient of the shield tunnel T and lower them while pressing them against the existing internal structural members to prevent any gaps from forming between them and the already installed internal structural members.

[0026] Furthermore, if the internal structural members are simply lifted via wires from the platform of the transport trolley 12, which is parked in a location with a relatively large longitudinal gradient, the internal structural members will shift in the direction of gravity the moment they are lifted. Therefore, it is necessary to hold the internal structural members in place while lifting them.

[0027] Thus, the work required for lowering and raising the internal structural materials is burdensome for workers and can hinder smooth operations. Therefore, in areas with relatively large longitudinal gradients, the efficiency of installing the internal structural materials in the shield tunnel T may decrease.

[0028] To solve these problems, the internal structural material installation devices 100 and 200 according to this embodiment are configured to enable easy installation of internal structural materials inside the shield tunnel T, regardless of the magnitude of the longitudinal gradient of the shield tunnel T.

[0029] Next, with reference to Figures 2-6, the specific configurations of the internal structural material installation devices 100 and 200 will be described. Since the configurations of the first internal structural material installation device 100 and the second internal structural material installation device 200 are almost identical, only the configuration of the first internal structural material installation device 100 will be described below.

[0030] Figure 2 is a schematic diagram of the first internal structural member installation device 100 as viewed from the direction indicated by arrow A in Figure 1, showing the state in which the lower member 16 (internal structural member) of the box culvert 19 is lifted from the platform of the transport trolley 12 by the first internal structural member installation device 100. Figure 3 is a cross-sectional view showing a section along line BB in Figure 2, Figure 4 is a cross-sectional view showing a section along line CC in Figure 3, Figure 5 is an enlarged view showing the area around the restraint portion 65 described later as viewed from the direction indicated by arrow D in Figure 3, and Figure 6 is an enlarged view showing the portion indicated by arrow E in Figure 3. Note that in Figures 2 to 6, devices other than the first internal structural member installation device 100, such as the transport trolley 12, are not shown.

[0031] The first internal structural member installation device 100 comprises a pair of moving mechanisms 21 arranged at intervals from each other in the left-right direction of the shield tunnel T, a gate-shaped frame 22 connecting the pair of moving mechanisms 21, a suspension section 40 capable of suspending the lower member 16 (internal structural member) of the box culvert 19, a lifting section 60 (see Figure 3) for raising and lowering the suspension section 40 relative to the frame 22, and a restraining section 65 for restricting the relative movement of the lower member 16 (internal structural member) with respect to the suspension section 40.

[0032] The moving mechanism 21 is a mechanism having wheels 21a that can move on a pair of rails 15 laid at the bottom of the shield tunnel T along the axial direction of the shield tunnel T, and makes the entire device 100 movable along the axial direction of the shield tunnel T. The moving mechanism 21 also serves as the moving mechanism for the first trailing trolley 20A.

[0033] The frame 22 is a gate-shaped structure formed by joining steel members together, and comprises a pair of support frames 23 arranged at intervals from each other in the left-right direction of the shield tunnel T, each equipped with a movable mechanism 21 at its lower end, and a plurality of beam members 24 spanning between the pair of support frames 23 to connect them at the top. The frame 22 is also provided with guide sections 30 capable of guiding the suspension section 40 along a plane perpendicular to the axial direction of the shield tunnel T.

[0034] The beam member 24 is provided with the travel rails 14a of the aforementioned transport crane 14 along the axial direction of the shield tunnel T, and the frame 23 is used as a space for installing a control device that controls the operation of the shield tunneling machine 1 and a power supply equipment that supplies power to the shield tunneling machine 1.

[0035] Furthermore, each support frame 23 is provided with a running rail 26 and an auxiliary rail 27 to allow the guide section 30 to move along the axial direction of the shield tunnel T.

[0036] Specifically, the running rail 26 is an H-shaped or I-shaped steel beam provided along the axial direction of the shield tunnel T, and is fixed to a plurality of support members 25 extending from the frame 23 along the left-right direction of the shield tunnel T. The auxiliary rail 27 is a rail member in which a contact surface is formed for contact with the rollers 33a and 33b described later, which are provided on the guide section 30, and is fixed to the lower side of the frame 23 along the axial direction of the shield tunnel T. The running rail 26 also functions as a support part that supports the vertical component of the load acting on the guide section 30, and the auxiliary rail 27 also functions as a support part that supports the horizontal component of the load acting on the guide section 30.

[0037] As shown in Figure 3, the guide section 30 includes a connecting member 32 provided along the axial direction of the shield tunnel T, and a pair of guide rail members 31 whose upper ends are connected by the connecting member 32.

[0038] The guide rail members 31 are H-shaped steel and are provided along a direction perpendicular to the rail 15, that is, a direction perpendicular to the axial direction of the shield tunnel T. The grooves enclosed by the flange portion and the web portion of each guide rail member 31 are used as guide grooves to guide the movement of the suspension portion 40.

[0039] As shown in Figure 2, a second roller mechanism 33 is provided at the lower end of the guide rail member 31, facing the auxiliary rail 27, and the guide rail member 31 is in contact with the auxiliary rail 27 via the second roller mechanism 33. The second roller mechanism 33 is composed of a first roller 33a and a second roller 33b whose rotation axes are perpendicular to each other, and the auxiliary rail 27 has a contact surface that can be contacted by the first roller 33a and a contact surface that can be contacted by the second roller 33b, respectively.

[0040] The connecting member 32 is suspended from the running rail 26 via the first roller mechanism 32a, and a lifting section 60 hangs down from the lower surface of the connecting member 32 via the first connecting section 61, as shown in Figure 3. The first roller mechanism 32a is a mechanism having multiple rollers that can rotate and move on the lower flange of the running rail 26, and multiple such mechanisms are arranged at intervals in the axial direction of the shield tunnel T.

[0041] Furthermore, the guide section 30 is provided with a running section 34 that runs along the running rail 26. The running section 34 is fixed to the connecting member 32 and has a sprocket (not shown) that engages with a chain-type rail (not shown) provided along the lower surface of the running rail 26, and a running motor 34a that can rotate the sprocket in forward and reverse directions.

[0042] As shown in Figure 2, the guide section 30 of the above configuration is provided on each of the mounting frames 23 located on the left and right sides.

[0043] The suspension section 40 includes a base section 41 that is guided by the guide section 30 along a plane perpendicular to the axial direction of the shield tunnel T, and a swivel section 51 that is rotatably supported by the base section 41 via a pivot shaft 48 that extends parallel to the direction in which the base section 41 is guided by the guide section 30.

[0044] As shown in Figures 2 to 4, the base section 41 includes a pair of frame members 42 provided along the axial direction of the shield tunnel T, a pair of support members 43 spanning between the pair of frame members 42, extension members 44 extending upward from both ends of each frame member 42, connecting members 45 joined to the sides of each frame member 42 and to which the lifting device of the lifting section 60 is connected via a second connecting section 62, a rotating section 46 positioned between the pair of support members 43 and rotating a pivot shaft 48 about a pivot center C1, and an actuator 47 that can adjust the position of the pivot center C1 of the pivot shaft 48.

[0045] As shown in Figure 2, each extension member 44 extending upward from each frame member 42 is provided with multiple first rollers 44a and second rollers 44b whose rotation axes are perpendicular to each other. These rollers 44a and 44b are positioned in a groove surrounded by the flange portion and web portion of the guide rail member 31, such that the first roller 44a contacts the flange portion of the guide rail member 31 and the second roller 44b contacts the web portion of the guide rail member 31.

[0046] In this way, the suspension portion 40 is guided by the guide rail member 31 along a plane perpendicular to the axial direction of the shield tunnel T via the rollers 44a and 44b provided on each extension member 44.

[0047] The pair of support members 43 are H-shaped steel beams, and the grooves enclosed by the flange portion and the web portion are used as guide grooves to guide the movement of the rotating portion 46.

[0048] The rotating section 46 has a rotating motor (not shown) that rotates the rotating shaft 48, and multiple first rollers 46a and second rollers 46b are provided on both sides of the rotating section 46, as shown in Figure 4, with their rotation axes perpendicular to each other. These rollers 46a and 46b are arranged in a groove surrounded by the flange portion and the web portion of the support member 43, such that the first roller 46a contacts the flange portion of the support member 43 and the second roller 46b contacts the web portion of the support member 43.

[0049] The actuator 47 is a hydraulic or electric cylinder composed of a cylinder and a rod. As shown in Figure 4, the cylinder is fixed to the frame member 42, and the tip of the rod is fixed to the rotating part 46. Therefore, by extending and retracting the actuator 47, it is possible to finely adjust the position of the rotation center C1 of the pivot shaft 48 in the left-right direction of the shield tunnel T.

[0050] As shown in Figures 2-4, the swivel section 51 includes an arm holding section 52 to which the pivot shaft 48 is joined, and a pair of arm sections 53 that are held by the arm holding section 52 so as to be movable in a direction perpendicular to the pivot center C1.

[0051] The arm portion 53 includes an insertion portion 54 that is inserted into the arm holding portion 52, an extension portion 55 that extends downward from the end of the insertion portion 54, and a flat plate-shaped suspension device 56 provided at the tip of the extension portion 55.

[0052] As shown in Figures 5 and 6, a pin member 17 having a large diameter portion 17a and a small diameter portion 17b is pre-attached to the lower member 16 (internal structural member). The suspension device 56 has an insertion hole 56a with a diameter larger than the large diameter portion 17a of the pin member 17, and a locking hole 56b is formed downward from the lower end of the insertion hole 56a. The width of the locking hole 56b is set to be smaller than the diameter of the large diameter portion 17a of the pin member 17, and larger than the diameter of the small diameter portion 17b of the pin member 17.

[0053] Therefore, as shown in Figure 6(a), the position of the suspension device 56 is lowered so that the large diameter portion 17a of the pin member 17 and the insertion hole 56a face each other. Then, as shown in Figure 6(b), the suspension device 56 is brought closer to the lower member 16 so that the large diameter portion 17a passes through the insertion hole 56a. Furthermore, as shown in Figure 6(c), the position of the suspension device 56 is raised so that the small diameter portion 17b of the pin member 17 is inserted into the locking hole 56b.

[0054] This allows the lower member 16 to be suspended from the suspension device 56 via the pin member 17. The pin member 17 is removed from the lower member 16 after it has been installed in a predetermined position within the shield tunnel T. The lifting and lowering of the suspension device 56 is performed by the lifting unit 60, and the approach of the suspension device 56 to the lower member 16 is performed by the arm displacement actuator described later.

[0055] The arm holding portion 52 has a pair of insertion holes 52a into which the insertion portion 54 of the arm portion 53 is inserted. On both sides of the insertion portion 54 of the arm portion 53, a plurality of first rollers 54a and second rollers 54b are provided, as shown in Figure 4, with their rotation axes perpendicular to each other. These rollers 54a and 54b are arranged in the insertion hole 52a such that the first rollers 54a are in contact with the upper and lower surfaces of the insertion hole 52a, and the second rollers 54b are in contact with the side surfaces of the insertion hole 52a.

[0056] Furthermore, the swivel section 51 is provided with an arm displacement actuator (not shown) in which a cylinder is fixed to the arm holding section 52 and the tip of a rod is fixed to the arm section 53. By extending and retracting this arm displacement actuator, the size of the distance between the suspension devices 56 of the pair of arm sections 53 can be changed.

[0057] The lifting section 60 is a so-called electric hoist comprising a hoisting device, a wire rope that is hoisted up by the hoisting device, and a lifting device attached to the end of the wire rope, and as described above, it is provided between the connecting member 32 of the guide section 30 and the connecting member 45 of the lifting section 40. In the embodiment shown in Figures 3 and 4, two lifting sections 60 are provided on the right side and two on the left side of the shield tunnel T, but the number of lifting sections 60 is not limited to this, and there may be three or more on each side, or the number provided on the right side and left side of the shield tunnel T may differ.

[0058] The restraining part 65 is a pressing mechanism that presses the lower member 16 (internal structural material) suspended from the suspension part 40 downward in the guide direction of the guide part 30, and is provided on the swivel part 51.

[0059] Specifically, the restraining part 65 is a hydraulic or electric cylinder composed of a cylinder 65a and a rod 65b. As shown in Figure 5, the cylinder 65a is fixed to the lower surface of the arm holding part 52, and the tip of the rod 65b can contact the upper surface of the lower member 16 (internal structural material).

[0060] Multiple restraint units 65 are arranged symmetrically on either side of a line connecting the locking holes 56b of the pair of suspension devices 56. For example, as shown in Figure 4, they are provided at the four corners of the lower surface of the arm holding unit 52.

[0061] When each of the restraining parts 65 arranged in this manner is extended, and the pressing force of each restraining part 65 pushes the lower member 16 downward, the axial force in the extended part 55 of the arm part 53 that holds the lower member 16 via the pin member 17 increases. In this way, by bringing the multiple restraining parts 65 into contact with the lower member 16 and increasing the axial force of the extended part 55, the relative movement of the lower member 16 (internal structural material) with respect to the suspension part 40 is restricted.

[0062] Furthermore, as shown in Figure 5, if one of the restraining parts 65, which are positioned on either side of the extension 55, is extended and the other is contracted, the lower member 16 suspended from the suspension part 40 will tilt around the pin member 17.

[0063] In other words, by arranging the restraining parts 65 such that the direction in which the lower member 16 tilts due to the pressure of one of the restraining parts 65 is opposite to the direction in which the lower member 16 tilts due to the pressure of another restraining part 65, it is possible to fine-tune the magnitude and direction of the tilt of the lower member 16 suspended from the suspension part 40 by adjusting the extension amount of each restraining part 65.

[0064] Next, we will describe an internal construction method for constructing the interior of the shield tunnel T using the first internal structural material installation device 100 and the second internal structural material installation device 200 configured as described above. In the following description, we will explain the case in which a box culvert 19 is constructed as an internal structural material inside the shield tunnel T.

[0065] First, as shown in Figure 1, the lower member 16 and upper member 18 of the box culvert 19 are transported into the shield tunnel T by a transport trolley 12 along with the segment pieces 7 that constitute the shield tunnel T. The transport trolley 12 has a vehicle height that allows it to travel inside the existing box culvert 19, and the internal structural materials such as the lower member 16 and upper member 18 and the segment pieces 7 are brought in through the internal space of the existing box culvert 19 (transportation process).

[0066] By utilizing the internal space of the existing box culvert 19 as a passage for transporting segment pieces 7 and internal structural materials, it becomes unnecessary to secure space above the existing box culvert 19 for the transport trolley 12 to travel. In other words, it becomes unnecessary to provide a transport passage, which is space to allow the transport trolley 12 to pass, for the third and fourth follower trolleys 20C and 20D that move in the area where the box culvert 19 is installed, following the shield tunneling machine 1.

[0067] Therefore, it becomes possible to increase the loading capacity of the third and fourth trailing bogies 20C and 20D, and to shorten the length of the trailing bogies 20C and 20D or reduce the number of trailing bogies 20C and 20D. As a result, the construction cost of the shield tunnel T can be reduced.

[0068] The lower member 16, transported into the shield tunnel T by the transport trolley 12, is lifted by the suspension section 40 of the first internal structural material installation device 100 provided on the first trailing trolley 20A.

[0069] Specifically, the lifting unit 60 raises and lowers the suspension device 56, and the arm displacement actuator adjusts the size of the gap between the suspension devices 56, so that the small diameter portion 17b of the pin member 17 is inserted into the locking hole 56b of the suspension device 56 in the procedure shown in Figures 6(a), (b), and (c).

[0070] At the same time, by extending each restraint portion 65 and increasing the axial force at the extended portion 55 of each arm portion 53, the relative movement of the lower member 16 with respect to the suspension portion 40 is restricted.

[0071] With the lower member 16 restricted from relative movement with respect to the suspension section 40, the hoisting device of the lifting section 60 winds up the wire rope to raise the suspension section 40 along the guide section 30.

[0072] As described above, if the lower member 16 (internal structural member) is simply lifted via a wire from the loading platform of a transport trolley 12 parked at a point in the shield tunnel T where the longitudinal gradient is relatively large, the lower member 16 will shift in the direction of gravity the moment it is lifted. Therefore, it is necessary to hold down the lower member 16 while lifting it.

[0073] In contrast, when the lower member 16 is lifted by the first internal structural member installation device 100 with the above configuration, the lower member 16 is restrained by the restraint part 65 and does not move relative to the suspension part 40. Furthermore, the suspension part 40 is guided by the guide part 30 to rise along a plane perpendicular to the axial direction of the shield tunnel T. In other words, the lower member 16 suspended from the suspension part 40 is lifted along a direction perpendicular to the axial direction of the shield tunnel T, rather than in the direction of gravity, regardless of the magnitude of the longitudinal gradient of the shield tunnel T.

[0074] Therefore, since the lower member 16 is prevented from shifting in the direction of gravity the moment it is lifted, it becomes unnecessary to hold down the lower member 16. This reduces the burden on workers and improves the work efficiency of installing the lower member 16 in the shield tunnel T.

[0075] As shown in Figure 2, the orientation of the lower member 16, which is lifted from the platform of the transport trolley 12 via the suspension section 40, remains the same as when it was placed on the platform of the transport trolley 12, and is not oriented in a way that would allow it to be installed inside the shield tunnel T.

[0076] Therefore, the pivot section 51 is rotated around the pivot center C1 until the orientation of the lower member 16 is such that it is installed inside the shield tunnel T. Specifically, the pivot motor of the pivot section 46 is driven to rotate the pivot shaft 48, and the pivot section 51 is rotated by a predetermined angle (approximately 90 degrees).

[0077] Next, the lower member 16 suspended from the suspension section 40 is moved upward from its installation position. Specifically, the suspension section 40 is moved along the running rail 26 together with the guide section 30 by driving the running motor 34a of the running section 34.

[0078] When the lower member 16 reaches above the installation position, the wire rope is unfurled from the hoisting device of the lifting unit 60, causing the suspension unit 40 to descend along the guide unit 30.

[0079] As described above, when lowering a lower member 16 (internal structural member) that is simply suspended via a wire to a section of a shield tunnel T with a relatively large longitudinal gradient, it is necessary to tilt the lower surface of the lower member 16 to match the longitudinal gradient of the shield tunnel T, and to lower the suspended lower member 16 while pressing it against the existing lower member 16 so that no gap is created between it and the already installed lower member 16.

[0080] In contrast, when lowering the lower member 16 suspended by the first internal structural member installation device 100 with the above configuration, the lower member 16 is restrained by the restraint part 65 and therefore does not move relative to the suspension part 40. Furthermore, the suspension part 40 is guided by the guide part 30 to descend along a plane perpendicular to the axial direction of the shield tunnel T. In other words, the lower member 16 suspended by the suspension part 40 is lowered along a direction perpendicular to the axial direction of the shield tunnel T, rather than in the direction of gravity, regardless of the magnitude of the longitudinal gradient of the shield tunnel T.

[0081] Therefore, it is unnecessary to tilt the lower surface of the lower member 16 to match the longitudinal gradient of the shield tunnel T, and it is also unnecessary to press the suspended lower member 16 against the existing lower member 16. This reduces the burden on workers and improves the work efficiency of installing the lower member 16 in the shield tunnel T.

[0082] As the suspension section 40 descends along the guide section 30, and it is confirmed that the lower member 16 is placed on the bottom surface of the shield tunnel T as shown in Figure 7, each restraint section 65 contracts, and the restraint of the lower member 16 by each restraint section 65 is released. Figure 7 shows the state in which the lower member 16 (internal structural member) is installed inside the shield tunnel T, and is a view of the first internal structural member installation device 100 from the same direction as in Figure 2.

[0083] When the restraints imposed by each restraint part 65 are released, the lifting part 60 raises and lowers the suspension device 56, and the arm displacement actuator adjusts the distance between the suspension devices 56, thereby releasing the lock between the suspension device 56 and the pin member 17 in the reverse order of the procedure shown in Figures 6(a), (b), and (c).

[0084] This completes the process of installing the lower member 16 (internal structural member) on the bottom surface of the shield tunnel T using the first internal structural member installation device 100.

[0085] The rotation of the swivel section 51 may be performed after moving the lower member 16 above the installation position. Also, if the lower surface of the lower member 16 is not parallel to the installation surface of the shield tunnel T when lowering the lower member 16, the inclination of the lower member 16 may be adjusted by adjusting the amount of extension and contraction of each restraint section 65, as shown in Figure 5.

[0086] Furthermore, if the center position of the lower member 16 placed on the platform of the transport trolley 12 is misaligned with the rotation center C1 of the suspension part 40, the rotation center C1 of the suspension part 40 can be aligned with the center position of the lower member 16 by adjusting the extension and retraction amount of the actuator 47. Also, if the orientation of the pin member 17 of the lower member 16 placed on the platform of the transport trolley 12 is misaligned with the orientation of the insertion hole 56a of the suspension device 56 of the suspension part 40, the orientation of the insertion hole 56a can be aligned with the orientation of the pin member 17 by adjusting the rotation angle of the swivel part 51. This reduces the burden on workers and improves the work efficiency of installing the lower member 16 in the shield tunnel T.

[0087] By operating the second internal structural member installation device 200 using a similar procedure, the upper member 18, which is placed on the platform of the transport trolley 12, is lifted by the second internal structural member installation device 200 and then installed on top of the lower member 16, as shown in Figure 8. This completes the process of installing the upper member 18 on top of the lower member 16, and the installation of the box culvert 19 into the shield tunnel T is completed. Figure 8 is a schematic diagram of the second internal structural member installation device 200 as viewed from the direction indicated by arrow F in Figure 1, and shows the state in which the upper member 18 (internal structural member) has been installed on top of the lower member 16 (internal structural member) by the second internal structural member installation device 200.

[0088] In the installation of the upper member 18 using the second internal structural member installation device 200, the burden on workers is reduced, similar to the installation of the lower member 16 using the first internal structural member installation device 100. As a result, the work efficiency of installing the upper member 18 in the shield tunnel T can be improved.

[0089] Furthermore, in the above-described internal construction method, the installation of the lower member 16 by the first internal structural member installation device 100 is performed in front of the transport trolley 12, while the installation of the upper member 18 by the second internal structural member installation device 200 is performed behind the loading platform of the transport trolley 12.

[0090] In other words, the first trailing carriage 20A, positioned behind the shield tunneling machine 1, is equipped with the first internal structural material installation device 100 configured as described above, so that the lower member 16, transported by the transport carriage 12, can be installed in front of the transport carriage 12. The second trailing carriage 20B, positioned behind the first trailing carriage 20A, is equipped with the second internal structural material installation device 200 so that the upper member 18, transported by the transport carriage 12, can be installed behind the loading platform of the transport carriage 12.

[0091] This allows the transport trolley 12, which utilizes the internal space of the existing box culvert 19 as a travel passage, to be parked in an area where only the lower member 16 of the box culvert 19 is installed, that is, an area where the upper member 18 of the box culvert 19 has not yet been installed and the top is open. This enables the internal structural materials placed on the platform of the transport trolley 12 to be efficiently installed by the internal structural material installation devices 100, 200, and also enables the segment pieces 7 constituting the shield tunnel T to be efficiently transferred from the platform of the transport trolley 12 to the segment supply device 10.

[0092] According to the embodiments described above, the following effects are achieved.

[0093] In this embodiment, the frame 22 of the internal structural material installation device 100,200 is provided with a guide section 30 that can guide the suspension section 40, which moves up and down in conjunction with the lifting and lowering of the internal structural material, along a plane perpendicular to the axial direction of the shield tunnel T.

[0094] Therefore, the internal structural members suspended from the suspension section 40 are lifted and lowered not in the direction of gravity, but in a direction perpendicular to the axial direction of the shield tunnel T, regardless of the magnitude of the longitudinal gradient of the shield tunnel T. In other words, the internal structural members are held so that their lower surface is approximately parallel to the installation surface of the shield tunnel T from the time they are lifted until they are lowered.

[0095] Therefore, when lifting the internal structural members, there is no need to suppress their movement in the direction of gravity, and when lowering the internal structural members, there is no need to tilt them to match the longitudinal gradient of the shield tunnel T. This reduces the burden on workers and improves the work efficiency of installing the internal structural members in the shield tunnel T. Furthermore, it improves the accuracy of installing the internal structural members in the shield tunnel T.

[0096] Furthermore, in this embodiment, the internal structural material installation devices 100 and 200 are provided with a restraining part 65 that restricts the relative movement of the internal structural material with respect to the suspension part 40.

[0097] In this way, by raising and lowering the suspension section 40 while the restraint section 65 restricts the relative movement of the internal structural material with respect to the suspension section 40, the internal structural material suspended from the suspension section 40 can be reliably lifted and lowered along a direction perpendicular to the axial direction of the shield tunnel T.

[0098] Next, modifications of this embodiment will be described. Note that the following modifications are also within the scope of the present invention, and it is possible to combine the configurations shown in the modifications with the configurations described in the above-described embodiments, or to combine the configurations described in the following different modifications.

[0099] In the above embodiment, the suspension devices 56 are provided in pairs facing each other so as to sandwich the internal structural material from two directions. Alternatively, there may be three or more suspension devices 56, for example, arranged so that the internal structural material can be lifted from all four sides. When multiple suspension devices 56 are provided to surround the internal structural material in this way, the relative movement of the internal structural material with respect to the suspension portion 40 is substantially restricted by the suspension devices 56, so it is not necessary to provide the restraining portion 65.

[0100] Furthermore, in the above embodiment, the restraint portion 65 is a cylinder device that presses the internal structural material suspended from the suspension portion 40 downward in the guide direction of the guide portion 30. The restraint portion 65 is not limited to such a cylinder device, and may have any configuration that can restrict the relative movement of the internal structural material with respect to the suspension portion 40. For example, it may restrict the relative movement of the internal structural material with respect to the suspension portion 40 by contracting the extension portion 55 of the arm portion 53 and pressing the upper surface of the internal structural material against the arm holding portion 52.

[0101] Furthermore, in the above embodiment, the first internal structural material installation device 100 and the second internal structural material installation device 200 are arranged on separate successor trolleys. Alternatively, the first internal structural material installation device 100 and the second internal structural material installation device 200 may be arranged on the same successor trolley.

[0102] Furthermore, in the above embodiment, the installation of the lower member 16 and the upper member 18 of the box culvert 19 is performed by separate internal structural material installation devices 100 and 200. Alternatively, the installation of the lower member 16 and the upper member 18 may be performed by a single internal structural material installation device.

[0103] Furthermore, in the above embodiment, the shield tunneling machine 1 is a so-called earth pressure balance type shield tunneling machine. Alternatively, the shield tunneling machine 1 may be a so-called slurry pressure type shield tunneling machine equipped with a supply and discharge device that delivers excavated soil accumulated in the chamber to the rear of the shield tunneling machine 1 by supplying and discharging slurry into and out of the chamber.

[0104] Although embodiments of the present invention have been described above, these embodiments only represent a part of the application examples of the present invention, and are not intended to limit the technical scope of the present invention to the specific configurations of the above embodiments. [Explanation of symbols]

[0105] 100...First internal structural material installation device (internal structural material installation device) 200...Second internal structural material installation device (internal structural material installation device) 1. Shield tunneling machine 16...Lower member (internal structural material) 18...Top member (internal structural material) 19. Box Culvert 20... Following bogie 21...Moving mechanism 22...frames 30... Guide section 40... Hanging section 41...Base section 48...Rotating shaft 51...Swivel section 56...Hanging tool 60...Lifting section 65...Restraint part T-shield tunnel

Claims

1. An internal structural material installation device for installing precast internal structural materials inside a shield tunnel, A pair of moving mechanisms are arranged in the left-right direction of the shield tunnel, spaced apart from each other, and capable of moving along the axial direction within the shield tunnel, A gate-shaped frame connecting the pair of moving mechanisms, A suspension section from which the aforementioned internal structural material can be suspended, It comprises a lifting unit that raises and lowers the suspension unit relative to the frame, The frame is provided with a guide section that can guide the suspension section, which moves up and down in conjunction with the lifting and lowering of the internal structural material, along a plane perpendicular to the axial direction of the shield tunnel. The frame comprises a pair of support structures arranged at intervals from each other in the left-right direction of the shield tunnel, and a beam member connecting the pair of support structures above. Each of the pair of frames is separately provided with a first support portion that supports the vertical component of the load acting on the guide portion, and a second support portion that supports the horizontal component of the load acting on the guide portion. Internal structural material installation equipment.

2. The first support portion is a first rail that makes the guide portion movable relative to the frame along the axial direction of the shield tunnel, The second support portion is provided below the first rail and is a second rail that allows the guide portion to move along the axial direction of the shield tunnel relative to the frame. The internal structural material installation device according to claim 1.

3. The system further includes a restraining portion that restricts the relative movement of the internal structural material with respect to the suspension portion. An internal structural material installation device according to claim 1 or 2.

4. The restraining portion is a pressing mechanism that presses the internal structural material suspended from the suspension portion downward in the guide direction of the guide portion. At least one pair of restraining parts are provided, and they are arranged such that the direction in which the internal structural material tilts due to the pressure of one restraining part is opposite to the direction in which the internal structural material tilts due to the pressure of the other restraining part. The internal structural material installation device according to claim 3.

5. The aforementioned suspension part is, A pivoting part that rotates around an axis parallel to the guiding direction of the aforementioned guide part, It has a base portion that supports the aforementioned swivel portion so that it can rotate, The restraining part is provided on the rotating part, The internal structural material installation device according to claim 3.

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