JP7448915B2 - Arched segment assembly equipment and assembly method - Google Patents

Description

The present invention provides an arch-shaped lining segment (hereinafter referred to as It concerns the technique of constructing arcuate segments (referred to as arcuate segments). In particular, the present invention relates to an apparatus and method for assembling arched segments for guiding the arched segments to their installation locations during construction.

When constructing an underground road tunnel, it is necessary to connect an underground main tunnel with a ramp tunnel from above ground for branching to or merging with an above-ground road. One of the construction methods for constructing these joint areas underground is to construct both tunnels in close proximity and parallel to each other, and then create an underground space by using the ground between the linings of both tunnels as an arch-shaped inner surface of the ground. A method of widening excavation is being adopted. The present invention relates to an assembly apparatus and an assembly method for constructing an arch-shaped segment to be lined on the ceiling in the upper half of this widening excavation section.

Patent Document 1 is disclosed as a prior art. The arch-shaped segment of this technology was devised on the premise of a steel segment (a box-shaped structure made of steel plates). However, in recent years, the widened cross section has become larger, and heavy structural segments (for example, segments made of a steel shell filled with concrete) have been adopted for the lining structure in order to cope with construction conditions that require construction at great depths. The weight per piece of the segment has increased several times compared to before. In view of these conditions, prior art methods and structures have become overloaded and require improvements.

Japanese Patent Application Publication No. 2014-211054

At the left and right end positions of the arched segments, the distance between the shoring installed in the ground after widening excavation and the existing tunnel lining becomes narrower, so the end segment pieces It must be assembled by inserting from the center side.

In Patent Document 1, when assembling the end segment piece, the vicinity of the central end of the segment piece is supported in a cantilever by the gripping portion of the end of the arm extending to the left and right of the erector device, and the arm is moved to a predetermined position at the end. The assembly was carried out by circling around. With this method, in the case of heavy segment pieces, the burden of moment load due to cantilevering on the erector device becomes large, and in order to realize the construction method, the device must be large-scale, and a limited space (underground space) is required. Recruitment becomes difficult.

In Patent Document 1, the centering of the curvature of the guide rail for turning the erector device and the curvature of the existing segment, which is the assembly standard for the new assembly segment, is performed between the upper support base on which the guide rail is mounted and the lower truck frame. Adjustments were made using a jack. In addition, to align the inner surfaces of the existing and new segments and to roughly align their bolt holes, the gripping posture of the segment pieces is adjusted using an erector device, and assembly time is wasted on these adjustments. Ta.

With this method, there is a concern that it will take a longer time to make these adjustments in larger and heavier segments.
In Patent Document 1, when loading and gripping a segment piece to be assembled into a segment assembly device, the segment piece is lifted by a lift cart placed in front of the assembly device, the assembly device is moved to the lower part of the lift cart, and the segment piece is assembled into a segment assembly device. Pass and hold pieces. Thereafter, the assembly device moved again to the segment assembly position while gripping the segment piece. It was necessary to repeat this operation for each of the plurality of segment pieces, and the loading and gripping operation took time. In addition, since the lift truck was hoisted by slinging it onto a wire using a winch and sheave, when the weight of the segment increases, the lifting device including the lift truck becomes larger and the work time becomes an issue.

An object of the present invention is to cope with the increase in the weight of arch-shaped segments due to the increase in the size and depth of underground widening sections. The more specific objective is to reduce the load on the erector device that assembles the arched segments, reduce assembly work time including posture adjustment operations during assembly, and improve assembly accuracy. be.

In order to achieve the above object, the present invention provides an arch-shaped segment assembly device used when constructing segments constituting an arch-shaped lining wall, in which a segment piece is gripped by an erector device. In order to guide and move the segment to a predetermined position, a plurality of rotating roller receivers are provided at intervals in the circumferential direction on an extending surface extending along the curvature shape of the inner circumferential surface of the arch-shaped segment. The present invention is characterized by comprising a guide device structured to receive the weight of the segment piece by receiving the lower surface of the segment piece by means of a rotating roller receiver.

According to the present invention, the weight of the segment piece is received by the lower surface of the segment piece by the rotating roller receiver, and the segment can be moved to the assembly position by being gripped by the erector device. Therefore, when assembling the end segment pieces at both the left and right ends of the arched segment, it is possible to omit movement under an extreme cantilevered load state of grasping one end of the segment piece, and the load on the erector device can be reduced. can.

Furthermore, in the operation of the assembly apparatus of the present invention, before segment assembly, the assembly apparatus can be raised by an outrigger device or the like of the assembly apparatus, and the rotating roller receiver of the guide apparatus can be pressed against the inner circumferential surface of the existing segment. In this way, the installation position of the assembly device is centered according to the inner circumferential curvature of the existing segment due to the rolling movement of the rotating roller receiver. As a result, in the guide device, the rotating roller receiver serves as a guide along the inside of the existing segment, and the radial position of the segment piece before assembly, which is conveyed on the guide device, is determined by following the existing segment. Therefore, the time required to adjust the gripping postures for aligning the inner surfaces of the existing and new segments and roughly aligning their bolt holes is shortened, and the accuracy of segment assembly is improved. In particular, these effects are significant because the segment pieces at both ends of the arched segment are assembled in a narrow assembly space and the weight of the segment connected to the inner segment piece is large.

As mentioned above, when the guide device is raised before segment assembly and the rotating roller receiver of the guide device is pressed against the inner circumferential surface of the existing segment, the entire rotating roller receiver will be attached to the existing segment due to the rolling of the rotating roller receiver. Contact and follow the inner peripheral surface of the existing segment. Therefore, the configuration is such that the various reaction forces generated during segment assembly can be supported together with the outrigger device, etc., and the posture of the entire arch-shaped segment assembly apparatus can be fixed and supported during segment assembly, making it possible to perform stable assembly work.

When assembling the arched segment using the guide device, it is necessary to lift the segment piece up onto the guide device, which is the gripping position of the segment piece with the erector device. In the configuration based on the above invention, it is preferable to provide a space that divides the guide device into left and right sides at approximately the center position in the width direction of the arch-shaped segment assembly device, and to provide a lift device that lifts up the guide device to the segment piece gripping position. In this way, segment pieces can be repeatedly fed to the lift device using heavy equipment while the assembly device is installed in a fixed position at the segment assembly location, which reduces the time required for loading and grasping work, and allows for This eliminates the need for a device for lifting segment pieces. Further, the work of slinging the segment piece and the lifting device and releasing the sling work is also unnecessary, and work efficiency can be improved.

As described above, the present invention has the effect of reducing the load on the erector device.

The whole front sectional view showing the arch-shaped lining wall in the widening excavation construction area. FIG. 3 is a front cross-sectional view showing the upper space in the excavation work section of the arch-shaped segment assembly device before construction. FIG. 3 is an enlarged front sectional view of the end showing the upper space portion of the excavation work section in a state before construction of the arch-shaped segment assembly device. FIG. 3 is a side sectional view of the arcuate segment assembly device in the activated state of the outrigger device; FIG. 3 is a plan view of the guide device. FIG. 3 is a partially enlarged plan view of the guide device. FIG. 3 is a side sectional view of the guide device showing the relationship between the erector device and the segments. FIG. 2 is a plan view showing a lift device. FIG. 3 is a front sectional view showing the operating state of the outrigger device before construction of the first segment piece (end portion). FIG. 3 is a front sectional view showing a state in which the first segment piece is placed on a lift device. FIG. 7 is a front sectional view showing a state in which the first segment piece is lifted to a gripping position by the erector device. FIG. 3 is a front sectional view showing a state in which the first segment piece is temporarily placed on the guide device. FIG. 7 is a front sectional view showing a state in which the second segment piece is connected to the first segment on the guide device. FIG. 3 is a front sectional view showing a state in which the first segment piece and the second segment piece are installed at predetermined positions (ends). The front cross-sectional view which shows the state where the 3rd segment piece was mounted on the lift device. FIG. 7 is a front sectional view showing a state in which the third segment piece has been lifted to a gripping position by the erector device. FIG. 7 is a front sectional view showing a state in which the third segment piece is temporarily placed by a guide device. FIG. 7 is a front sectional view showing a state in which the fourth segment piece is connected to the third segment piece on the guide device. The front sectional view which shows the state where the 3rd segment piece and the 4th segment piece were installed in the predetermined position (end part). FIG. 7 is a front sectional view showing a state in which the fifth segment piece is gripped by the erector device. FIG. 7 is a front sectional view showing a state in which the sixth segment piece (K segment piece) is lifted up to a gripping position by the erector device. FIG. 7 is a side sectional view showing a state in which the sixth segment piece is gripped by the erector device before insertion. FIG. 7 is a simplified plan view showing the inserted state of the sixth segment piece. FIG. 7 is a front sectional view showing the inserted state of the sixth segment piece.

(Embodiment)
DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments embodying the present invention will be described based on the drawings.
FIG. 1 shows the entire underground widening excavation construction section 10. This widening excavation construction section 10 is extended in a direction perpendicular to the paper plane of FIG. The widening excavation construction section 10 includes two cylindrical existing tunnel linings 11 that are spaced apart from each other and extend in the extension direction of the widening excavation construction section 10 . The existing tunnel lining 11 is used as a road tunnel.

As shown in FIG. 1, the widening excavation construction section 10 in the area between both tunnel linings 11 is divided into an upper widening excavation section 15 and a lower widening excavation section 16, and an unexcavated section 14 is left in the middle part. The upper surface of the unexcavated portion 14 serves as a base for lining work for the upper widening excavated portion 15. The ceiling portion of the upper widening excavation section 15, which is the object of the embodiment of the present invention, has an arch shape. The arch segment assembly device 12 of this embodiment, which will be described later, is used in the upper widening excavation section 15. After the upper widening excavation part 15 is excavated, an arch-shaped shoring 17 is provided as primary support on the inner surface of the ceiling part.

As shown in FIG. 1, the inner surface of the shoring 17 in the ceiling of the upper widening excavation 15 is covered by arched segments 23. As shown in FIG. This arch-shaped segment 23 consists of first to sixth segment pieces 231 to 236. The first to sixth segment pieces 231 to 236 are composed of a steel shell 21 and concrete 22 filled in the steel shell 21. The arched segments 23 are assembled in rows and arranged in parallel in the extending direction of the tunnel. In this embodiment, one row of arched segments 23 is divided into six segments by the first to sixth segment pieces 231 to 236, but this is not the case as the number of divisions changes depending on the construction.

An overview of the basic structure and function of the arch-shaped segment assembly device 12 shown in FIG. 2 and subsequent drawings will be explained. The arch segment assembly device 12 assembles the first to sixth segment pieces 231 to 236 into which the above-mentioned row of arch segment 23 is divided piece by piece from both ends using an erector device 71. The erector device 71 moves along a pair of arch-shaped running beams 31 that are arranged in parallel in the extending direction of the widening excavation construction section 10 by a cart drive section provided in the erector device 71. A guide device 24, which is a main element of the embodiment of the present invention, is supported by a running beam 31. In the center of the arch-shaped segment assembly device 12, guide devices 24 are arranged in left and right sections. A lift device 61 for supplying the segment pieces 231 to 236 is provided in the space between them, and at that position, the segment pieces 231 to 236 are supplied to the erector device 71 and gripped.

As shown in FIGS. 2 to 4, outrigger devices 35 are provided at both ends of the running beam 31 to fix the arcuate segment assembly device 12 during assembly operations. When the assembly of one row of arched segments 23 is completed, the arched segment assembly device 12 is moved forward in the extending direction of the upper widening excavation section 15 by a distance equal to the width of one row of arched segments 23, and the next assembly is completed. The rows are assembled, and this process is repeated to advance in the extending direction of the widening excavation construction section 10. Therefore, the arch-shaped segment assembly device 12 is provided with wheels 33 for running on the rails 34 at the lower part of the support legs 32, and has a gate-shaped truck structure as a whole.

Therefore, the segment guide device 24, which is included in the arch-shaped segment assembly device 12 and is capable of constructing the arch-shaped segments 23, and related structures will be described below. This segment guide device 24 and related components are arranged so that the first to sixth segment pieces 231 to 236 are guided along the arch inner peripheral surface 20b of the existing arched segment 20 constructed in the previous process of assembling the first to sixth segment pieces 231 to 236. ~236 is used to construct the arcuate segment 23 by guiding.

As shown in FIGS. 2 to 6, the segment guide device 24 is supported by a pair of arch-shaped running beams 31 having an I-shaped cross section. The erector device 71 moves on the traveling beam 31. These running beams 31 have an inner peripheral surface curvature concentrically with respect to the arched segment 23 to be constructed. Four support legs 32 are installed at the center in the left-right direction of both traveling beams 31, and wheels 33 are installed at the lower ends of the support legs 32. The wheels 33 allow the arch-shaped segment assembly device 12 to run on rails 34 laid on the upper surface of the unexcavated section 14 so as to extend in the extending direction of the widened excavated section 10.

As shown in FIGS. 2 to 6, an outrigger device 35 is fixed to arms 36 extending at four locations on the front and rear sides of both end portions of both running beams 31. As shown in FIGS. The outrigger device 35 is composed of an inner cylinder part 39 that expands and contracts downward, and an outer cylinder part 38 that guides the sliding movement of the inner cylinder part 39 on the outside, and the outer cylinder part 38 is installed at the tip of the arm 36. . The inner cylinder part 39 has a built-in hydraulic cylinder 37 for telescopically operating the inner cylinder part 39, and this hydraulic cylinder 37 is connected between the inner cylinder part 39 and the outer cylinder part 38. An outrigger shoe 41 is swingably supported at the lower end of the inner cylindrical portion 39 via a spherical universal joint 40, and can correspond to an installation angle with respect to the existing tunnel lining 11 that serves as a ground contact surface. Moreover, the structure between the inner cylinder part 39 and the spherical universal joint 40 is such that it can slide in the width direction (left and right direction in FIG. 6), and when the guide device 24 centers the arch-shaped segment assembly device 12, the outrigger shoe The position can be adjusted in the width direction regardless of the position of 41.

As shown in FIGS. 2, 3, and 5, a brace-like stay member 42 is interposed between each arm 36 and the support leg 32. As shown in FIGS. A brace-shaped stay member 43 is interposed between each arm 36 and a spacing member 44 installed between the lower end portions of the guide beams 53 and 54 in the circumferential direction that constitute the guide device 24.

As shown in FIGS. 4 and 9, the inner cylindrical portion 39 coupled to the hydraulic cylinder 37 is projected downward, so that the outrigger shoes 41 are pushed onto the upper surface of the outer periphery of the existing tunnel lining 11 as a ground surface. It is installed in the applied state. As a result of this operation, the entire arch-shaped segment assembly device 12 is pushed upward, and the guide device 24 is pressed against the arch inner peripheral surface 20b of the existing arch-shaped segment 20.

As shown in FIGS. 3, 6 and 7, a plurality of guide struts 51 are installed at intervals in the circumferential direction on both the front and rear sides of both sides of the traveling beam 31, excluding the circumferential center. are provided, and both 51 and 52 form an inverted L shape, and the front and rear guide columns 51 are erected with the beam members 52 facing inward. Guide beams 53 and 54 each having an arcuate curvature substantially along the arch inner circumferential surface 20b are installed on both guide columns 51 via beam members 52 so as to be located above both running beams 31. Therefore, the upper surfaces of the guide beams 53 and 54 become extension surfaces extending along the arch inner circumferential surface 20b. Here, as shown in FIG. 4, the guide device 24 supported by the guide column 51 on the front side of the traveling beam 31 is referred to as the front guide device 241 (left side in FIG. 4), and the guide device 24 supported by the guide column 51 on the rear side of the traveling beam The guide device 24 is referred to as a rear guide device 242 (on the right side in FIG. 4).

As shown in FIGS. 4 and 6, rotating roller receivers 56 made of free balls held by retainers 55 are provided at the upper ends of the guide columns 51 and on the upper surfaces of the guide beams 53 and 54 on both sides of the traveling beam 31, respectively. is rotatably supported in all directions. Therefore, the rotating roller receiver 56 is located on the outer peripheral surface of the traveling beam 31. The installation outer circumferential radius of each rotating roller receiver 56 has the same curvature with respect to the arch inner circumferential surface 20b. The front guide device 241 has a row of rotating roller receivers 56 arranged in the circumferential direction of the guide beam 53. The rear guide device 242 arranges three rows of rotating roller receivers 56, two rows in the circumferential direction of the guide beam 54 and one row at the upper end of each guide column 51. Note that the number of rows of the rotating roller receivers 56 is the minimum number of rows, and this is not the case when the applied load increases.

Then, as shown in FIG. 4, the arch segment assembly device 12 is installed so that the rear two rows of the rear guide devices 242 out of all four rows of the rotating roller receivers 56 are below the existing arch segment 20 position. do. In this state, the entire arch-shaped segment assembly device 12 is pushed up by the outrigger device 35, so that the inside of the existing arch-shaped segment 20 is pressed against the rotating roller receivers 56 in the two rear rows, and the entire arch-shaped segment assembly device 12 is pushed up. is fixed and the guide device 24 is positioned. The remaining rotating roller receivers 56 in one row of the front guide device 241 and the front row of the rear guide device 242 serve as guides for the segment pieces 231 to 236 that are gripped and moved by the erector device 71.

As shown in FIG. 3, FIG. 6, and FIG. A piece fixing member 58 is removably attached. The end piece fixing member 58 protrudes upward from the array curved surface of the rotating roller receiver 56 while being attached to the end piece fixing groove 57 .

As shown in FIGS. 3 and 7, in order to supply each of the segment pieces 231 to 236 to the arch-shaped segment assembly device 12, the guide device 24 is divided into left and right parts in the center, and in a space secured, Four lift devices 61 are supported on both the front and rear sides of the beam 31. This lift device 61 has a guide tube 62 installed on the traveling beam 31 and an elevating rod 63 supported by the guide tube 62 so as to be movable up and down. The lifting rod 63 is raised and lowered by a hydraulic cylinder 64. The lower ends of each pair of left and right lifting rods 63 sandwiching the running beam 31 are connected to each other by connecting members 65 at the front and back, so that the lifting rods 63 sandwiching the running beam 31 are raised and lowered in synchronization with the same stroke. Ru. However, each pair on the left and right can be raised and lowered with different strokes.

As shown in FIGS. 7 and 8, support members 66 are installed at the upper ends of the pair of left and right front and rear lifting rods 63 so as to protrude in the direction of each other and face each other. A receiving member 67 with a circular cross section is installed on the side surface. The upper end of the receiving member 67 is located higher than the upper surface of the supporting member 66. A positioning member 68 is installed on the upper surface of the receiving member 67 on the rear side. At the tip of the support member 66, a fall prevention member 69 is installed, which is located lower than the upper surface of the support member 66, forms a right angle to the receiving member 67, and protrudes in a direction toward both ends of the traveling beam 31. A stopper 70 is installed at the tip of the fall prevention material 69.

Then, for example, as shown by the two-dot chain line in FIG. 8, each of the segment pieces 231 to 236 is placed on the receiving member 67 while being positioned by the positioning member 68. Then, in this placed state, the receiving member 67 is raised from the lowered position by the hydraulic cylinder 64, whereby the placed segment pieces 231 to 236 are raised to the gripping position of the erector device 71. At this time, excessive movement of the segment pieces 231 to 236 in the circumferential direction is regulated by a stopper 70 provided on the fall prevention member 69, thereby preventing the segment pieces 231 to 236 from falling.

As shown in FIGS. 2 and 4, the traveling beam 31 is equipped with an erector device 71 for moving the segment pieces 231 to 236 in the circumferential direction of the traveling beam 31 along the arch inner peripheral surface 20b. There is. Since the erector device 71 follows the configuration of existing technology such as a shield tunneling machine, a detailed explanation will be omitted, but as outlined in FIG. 7, the basic configuration is as follows. That is, it is equipped with a traveling wheel 76 that rolls on the rail of the traveling beam 31 for traveling along the traveling beam 31, and a traveling drive unit 73 that engages with the rack of the traveling beam 31 and the pinion of the erector device 71. It has a traveling truck section 74. It also includes a gripping device 72 for gripping the segment pieces 231-236 and a lifting device 75 for supporting the gripping device for the segment pieces 231-236 and pushing up the segment pieces 231-236 toward the outer circumference.

Next, an example of a method for constructing a row of arched segments 23 using the erector device 71, guide device 24, and lift device 61 will be described.
FIG. 2 shows a state in which the outrigger shoes 41 of the outrigger device 35 are retracted upward when the arch-shaped segment assembly device 12 is moved in the extending direction of the widening excavation construction section 10, and the wheels 33 are moved on the rails 34. It is placed on. In this state, the guide device 24 is located on the lower side and is spaced apart from the existing arcuate segment 20. In this state, the arch-shaped segment assembly device 12 is moved along the rail 34 to the assembly position of the arch-shaped segment 23 by a traveling drive device (not shown).

Then, as shown in FIG. 9, in the assembled position, by extending the outrigger device 35 downward and lowering the outrigger shoe 41, the outrigger shoe 41 is installed in a pressed state against the upper surface of the existing tunnel lining 11. Ru. As a result of this operation, the arch-shaped segment assembly device 12 is raised, and the two rear rows of rotating roller receivers 56 of the rear guide device 242 are pressed against the existing arch-shaped segment 20, so that when the arch-shaped segment assembly device 12 is assembled. The state will be as follows. The rotating roller receivers 56 in the first row of the front guide device 241 and the first row in the front row of the rear guide device 242 are located at the same position as the arch inner peripheral surface 20b. At this time, the receiving member 67 of the lift device 61 is in the lowered position.

In this state, as shown in FIG. 10, the first segment piece 231 passes through the lower part of the arch-shaped segment assembly device 12 on the unexcavated portion 14 from behind in the extending direction of the rail 34 using a segment conveyor (not shown). be done. The first segment piece 231 is then transported to a position where there is no problem in lifting the first segment piece 231 forward. At the transported position, the first segment piece 231 is lifted by a lifting means (not shown) such as a forklift. Next, in this state, the first segment piece 231 is moved backward from that position in the extending direction of the rail 34, and both ends of the lower surface of the first segment piece 231 are moved by the lift device 61, as shown in FIGS. 8 and 10. It is placed on the receiving material 67 in the lowered position. Then, the first segment piece 231 is raised to the lining position of the arched segment 23 by the lift device 61.

In this state, as shown in FIG. 11, the inclination of the first segment piece 231 is adjusted by adjusting each stroke of the left and right lift devices 61 in order to bring the first segment piece 231 into the gripping posture with the erector device 71. . Thereafter, the erector device 71 moves on the traveling beam 31 and is located below the first segment piece 231. In this state, the lifting device 75 of the erector device 71 is extended upward, and the gripping device 72 at the center thereof is inserted into the downward gripping hole 25 at the center of the inner surface of the first segment piece 231. It is connected to and held by the one segment piece 231. Then, the receiving member 67 of the lift device 61 is lowered, and the first segment piece 231 is delivered onto the erector device 71.

At this time, as shown in FIG. 12, an end piece fixing member 58 is attached to the end piece fixing groove 57 of the guide beam 53 of the guide device 24. Note that the end piece fixing material 58 may be attached to the end piece fixing groove 57 at an earlier timing. Then, the erector device 71 is moved toward one of the descending ends of the traveling beam 31, and the first segment piece 231 gripped by the erector device 71 is moved together, so that the end portion of the first segment piece 231 becomes the end piece. It is stopped by the fixing member 58 and reaches a temporary position. In this state, the connection between the gripping device 72 of the erector device 71 and the gripping hole 25 of the first segment piece 231 is released, and the lifting device 75 is retracted downward to move the gripping device 72 into the first segment piece 231. It is removed from the grip hole 25. Then, the erector device 71 independently moves to the center position of the traveling beam 31 shown in FIG.

Next, in the same manner as the first segment piece 231, the next stage second segment piece 232 is placed on the receiving member 67 of the lift device 61, and the second segment piece 232 is placed on the arch-shaped segment 23 by the lift device 61. Raise it to the lining position. Then, as shown in FIG. 13, in the same manner as described above, the lifting device 75 of the erector device 71 is extended upward, and the gripping device 72 of the erector device 71 is connected to the gripping hole portion 25 of the second segment piece 232. The second segment piece 232 is gripped, the receiving member 67 of the lift device 61 is lowered, and the second segment piece 232 is delivered to the erector device 71.

Then, as shown in FIG. 13, the movement of the erector device 71 moves the second segment piece 232 to a position where it contacts the first segment piece 231 temporarily placed on the guide device 24. Next, the end of the second segment piece 232 is fastened to the end of the first segment piece 231 with a bolt (not shown).

Thereafter, as shown in FIG. 14, while the inner second segment piece 232 is gripped by its grip hole 25, the end piece fixing member 58 that was holding the first segment piece 231 is moved into the end piece fixing groove. It is extracted from 57. Then, as the erector device 71 moves, the first segment piece 231 and the second segment piece 232 are moved together toward the lower end side while being guided by the rotating roller receiver 56. As a result, the end of the first segment piece 231 is fastened to the connection part of the existing tunnel lining 11, and the rear side of both segment pieces 231, 232 is fastened to the piece of the existing arched segment 20 in the front row with bolts, and the end The first segment piece 231 and the second segment piece 232 are assembled.

Next, as shown in FIG. 15, the erector device 71 is moved toward the other lower end. In this state, as shown in FIG. 16, the third segment piece 233 is placed on the lift device 61 and lifted by the lift device 61 to the lining position of the arched segment 23. After the erector device 71 is moved to the gripping position of the third segment piece 233, the elevating device 75 of the erector device 71 is extended, so that the third segment piece 233 is connected to the gripping device 72 and gripped. . In this state, as shown in FIG. 17, by moving the erector device 71 toward the other lowered end, the third segment piece 233 is moved to the position of the opposite end piece fixing member 58 and temporarily placed. Ru. The end piece fixing material 58 may be attached to the end piece fixing groove 57 at any time before the third segment piece 233 starts moving, as described above.

Next, as shown in FIG. 18, the fourth segment piece 234 is supported on the lift device 61 and lifted by the lift device 61 to the lining position of the arched segment 23. Then, the fourth segment piece 234 is moved by the erector device 71 to the position of the third segment piece 233 temporarily placed on the guide device 24, in the same manner as the second segment piece 232 described above. It is bolted to the three segment piece 233.

Then, as shown in FIG. 19, the end piece fixing material 58 is pulled out from the end piece fixing groove 57 while the fourth segment piece 234 is being held by the holding hole 25 thereof. Next, while the third segment piece 233 and the fourth segment piece 234 are guided by the rotating roller receiver 56, the fourth segment piece 234 is moved by the erector device 71. The end of the third segment piece 233 is fastened to the existing tunnel lining 11 on the other descending end side, and the rear side of both segment pieces 233, 234 is fastened to the piece of the existing arched segment 20 in the front row with bolts, respectively. The third segment piece 233 and the fourth segment piece 234 at the end are assembled.

Next, as shown in FIG. 20, the fifth segment piece 235 is lifted by the lift device 61 to the lining position of the arched segment 23 and is gripped by the erector device 71. The fifth segment piece 235 is moved toward the second segment piece 232 by the movement of the erector device 71, but in this case, the fifth segment piece 235 is placed in the center of the traveling beam 31 between the guide beams 53 and 54. positioned. Therefore, after the fifth segment piece 235 is moved to a predetermined position only by the erector device 71 without being guided by the rotating roller receivers 56 of the guide beams 53 and 54, the end side is moved to the second segment piece 232. The rear side is bolted to the existing arched segment 20 of the front row. Thereafter, the fifth segment piece 235 and the fourth segment piece 234 are supported from below by a shape holding device (not shown) installed in front of the assembly device 12 for arched segments on the unexcavated portion 14, and are supported by a guide device. 24 prevents displacement of the segment pieces 231 to 235 after detachment.

Next, as shown in FIGS. 21 and 22, the hydraulic cylinder 37 of the outrigger device 35 is retracted, the arched segment assembly device 12 is lowered, the wheel 33 is placed on the rail 34, and the guide device 24 is spaced downwardly from the segment pieces 231-235. Moreover, the inner cylinder part 39 and the outrigger shoes 41 of the outrigger device 35 are separated from the existing tunnel lining 11 and raised. In this state, the arch-shaped segment assembly device 12 is moved forward by the width dimension of the arch-shaped segment 23 by a driving means (not shown). Furthermore, in this state, after the sixth segment piece 236 is placed on the lift device 61, it is delivered onto the erector device 71. Therefore, the sixth segment piece 236 is located in front of the fifth segment piece 235. Thereafter, due to the movement of the erector device 71, the sixth segment piece 236 faces the position of the gap between the fifth segment piece 235 and the third segment piece 233.

Here, as shown in FIG. 23, the sixth segment piece 236 has a tapered key shape with tapered surfaces 28 on both sides converging toward the rear. Opposing side surfaces of the third segment piece 233 and the fifth segment piece 235 on both sides are tapered surfaces 27 that widen at the same angle toward the front side.

Therefore, when assembling the sixth segment piece 236, the arch-shaped segment assembly device 12 is returned from the front to the rear while the sixth segment piece 236 is held on the erector device 71. Thereafter, as shown in FIGS. 23 and 24, the sixth segment piece 236 is moved to the third segment piece 233 by a longitudinal sliding device (not shown) of the gripping device 72 provided in the lifting device 75 of the erector device 71. and the fifth segment piece 235. After that, if both ends of the sixth segment piece 236 are brought into contact with the third segment piece 233 and the fifth segment piece 235, and the rear side is brought into contact with the existing arch-shaped segment 20 in the front row, and fastened with the bolt 29, the arch-shaped segment A column of 23 is constructed.

In this way, the arched segments 23 are sequentially constructed while moving the arched segment assembly device 12 forward by the array pitch.
This embodiment has the following effects.

(1) Since the distance between the shoring 17 and the existing tunnel lining 11 is narrow at both ends of the arched segment 23 in the left and right direction, the segment pieces 231 and 233 located at the ends are inserted from the center side. It needs to be assembled with. To make this possible, the first and second segment pieces 231 and 232 and the third and fourth segment pieces 233 and 234 connect two segment pieces each on the guide device 24. Then, the gripping holes 25 of the inner segment pieces 232, 234 are gripped by the erector device 71, and the weight is received and guided by the rotating roller receiver 56 on the lower surface, and the above-mentioned both ends are guided along the arch inner circumferential surface 20b. move it towards the side. Therefore, unlike the conventional configuration, it is not necessary to hold one end of the first to fourth segment pieces 231 to 234 and move them in a cantilever state so as to insert them into both ends. Therefore, almost no moment acts on the erector device 71 due to the weight of the first to fourth segment pieces 231 to 234. Furthermore, since the fifth and sixth segment pieces 235 and 236 are held independently by the erector device 71 at their central portions, the moment generated in the erector device 71 due to the weight of the fifth and sixth segment pieces 235 and 236 is small. For this reason, even if the first to sixth segment pieces 231 to 236 become larger and heavier due to the enlargement of the widening excavation construction section 10, the erector device 71 and the traveling beam 31 can be constructed with high rigidity and sturdy construction. There is no need to make the drive device 71, and the power of a drive device such as the travel drive unit 73 for operating the erector device 71 can be saved.

(2) In the state before assembling the arched segment 23, the outrigger device 35 of the arched segment assembly device 12 is operated to extend, and the rear two rows of the rear guide devices 242 are attached to the arch inner peripheral surface 20b of the existing arched segment 20. Press against the rotating roller receiver 56. In this way, the installation position of the arch-shaped segment assembly device 12 is centered in accordance with the inner circumferential curvature of the existing arch-shaped segment 20 due to the rolling motion of the rotating roller receiver 56. Thereby, in the segment guide device 24, the remaining two front rows of rotating roller receivers 56 serve as guides along the arch inner peripheral surface 20b of the existing arch-shaped segment 20. Therefore, the radial positions of the segment pieces 231 to 236 held by the erector device 71 and moved on the guide device 24 are determined by following the existing arched segments 20. Therefore, the time required to adjust the gripping postures for flushing the arch inner peripheral surfaces 20b of the existing arched segment 20 and the newly installed arched segment 23 and for roughly aligning their bolt holes is shortened. Furthermore, the accuracy of assembling the arched segments 23 is improved. In particular, when assembling the first segment piece 231 and the third segment piece 233 at both ends of the arched segment 23 shown above, it is necessary to assemble the second segment piece 232 and the third segment piece 233, which are the inner segments, in a narrow space. These effects are large because the segment weight in the connected state with the four segment piece 234 is large.

(3) In the state before assembling the arched segment 23, the outrigger device 35 of the arched segment assembly device 12 is operated to extend, and the rear two rows of the rear guide devices 242 are attached to the arch inner peripheral surface 20b of the existing arched segment 20. Press against the rotating roller receiver 56. In this way, due to the rolling motion of the rotating roller receivers 56, the entirety of the two rear rows of rotating roller receivers 56 comes into contact with the existing arch-shaped segment 20 and follows the inner circumferential surface 20b of the arch. Therefore, the configuration is such that it can support various reaction forces generated when assembling the arch-shaped segment 23 together with the outrigger device 35, and the posture of the entire arch-shaped segment assembly device 12 can be fixed and supported during segment assembly, resulting in stable assembly work. becomes possible.

(4) When assembling the arched segment 23 using the guide device 24, it is necessary to lift each segment piece 231 to 236 onto the guide device 24, which is the gripping position of the erector device 71. In this case, the lift device 61 is provided in a space that divides the guide device 24 into left and right parts at approximately the center position in the width direction of the arch-shaped segment assembly device 12. With this lift device 61, the arch-shaped segment assembly device 12 is installed in a fixed position at the arch-shaped segment 23 assembly location, and heavy equipment is used to repeatedly assemble the first segment piece 213 to the fifth segment piece 235 to the lift device 61. can. Therefore, the time required for the supply and gripping operation until gripping by the erector device 71 can be shortened. In addition, a device for lifting segment pieces such as a lift truck in the prior art is not required, and work for slinging the segment pieces and the lifting device and releasing the slings is also no longer necessary, improving work efficiency.

(Example of change)
This embodiment can be modified and implemented as follows. This embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.

- Instead of the rotating roller receiver 56 made of free balls of the segment guide device 24, use a cylindrical or cylindrical guide roller that rotates about one axis.
- Omit the outrigger device 35. Instead, a mechanism for extending and retracting the support leg 32 of the guide device 24 is provided in the support leg 32, and the arcuate segment assembly device 12 is raised and lowered by the operation of the extension and contraction mechanism.

- The lifting device 61 is provided separately and independently from the device 12 for assembling the arcuate segments.
(Other technical ideas)
The technical idea understood from the above embodiment is as follows.

(A) An arch equipped with a guide device according to claim 1, further comprising an erector device that is movably supported by the traveling beam and connected to the segment from its lower surface side to move the segment along the arch curve. Shape segment assembly equipment.

(B) An arch-shaped segment assembly device comprising a guide device according to claim 1, wherein the rotating roller receiver is formed of a free ball.

12... Arch-shaped segment assembly device 23... Arch-shaped segment 24... Guide device 31... Running beam 32... Support leg 33... Wheel 37... Hydraulic cylinder 35... Outrigger device 41... Outrigger shoe 51... Guide column 53... Guide beam 54... Guide beam 56...Rotating roller receiver 61...Lift device 62...Guide cylinder 63...Elevating rod 64...Hydraulic cylinder 65...Connecting material 67...Receiving material 71...Erector device 231...First segment piece 232...Second segment piece 233...Second segment piece 3 segment pieces 234... Fourth segment piece 235... Fifth segment piece 236... Sixth segment piece 241... Front side guide device 242... Back side guide device.

Claims (7)

An arch-shaped segment assembly device used when constructing segments constituting an arch-shaped lining wall,
In order to guide and move the segment piece to a predetermined position while being gripped by the erector device, an extending surface extending along the curvature shape of the inner circumferential surface of the arch-shaped segment is provided at mutual intervals in the circumferential direction. A guide device is provided with a plurality of rotating roller receivers, the lower surface of the segment piece is received by the rotating roller receivers, and the guide device is structured to receive the weight of the segment piece,
The rotary roller receiver is an arch-shaped segment assembly device made of free balls. A plurality of inverted L-shaped guide columns are provided front and rear of a pair of arch-shaped front and rear running beams for moving and running the erector device in the circumferential direction of the guide device, with a running area of the erector device in between, facing each other. The front and rear guide columns are each provided with a guide beam having a shape that follows the curvature of the inner circumferential surface of the segment at the upper end, and the rotating roller receivers are arranged in the circumferential direction on the outer circumferential surface of the guide beam, and the erector device 2. The apparatus for assembling arch-shaped segments according to claim 1, wherein the weight of the segment piece can be supported by rotating roller supports while the piece is being gripped. A pair of front and rear lifts are installed at two locations in the circumferential direction of a pair of front and rear running beams, and are spaced apart enough to support the segment piece that is supplied to the center of the arch-shaped segment assembly device at the front and back of both ends of its lower surface. has a device,
Both the front and rear lift devices each have a guide tube and a lifting rod supported by the guide tube and raised and lowered by a hydraulic cylinder. 2. The apparatus for assembling arcuate segments according to claim 1, wherein the segment pieces are raised to a gripping position by an erector device. The rotating roller receivers of the guide device are arranged in one or more rows along the circumferential direction on the guide beam at the tip of the front guide column, and two or more rows in the circumferential direction on the guide beam at the tip of the rear guide column. At the same time, one or more rows were arranged at the upper end of the rear guide column, and the rotating roller receivers on the front guide beam and the rotating roller receivers on the rear guide beam were placed across the running area of the erector device from the front and back. Apparatus for assembling arcuate segments according to claim 1 or 2. A method for assembling arch-shaped segments using the arch-shaped segment assembly apparatus according to any one of claims 1 to 4, comprising:
A method for assembling arch-shaped segments, comprising: guiding and moving the segment piece to a predetermined position while gripping it with an erector device, and assembling the segment piece by receiving the lower surface of the segment piece by the plurality of rotating roller receivers. An apparatus for assembling arcuate segments according to any one of claims 1 to 4, comprising:
When constructing the arch-shaped segment, the rotating roller receiver on the rear row side of the rear guide column is placed below the existing segment position, and the entire assembly device is raised using the outrigger device installed at the bottom of the assembly device. A method of assembling an arch-shaped segment in which the position is determined by pressing the rotating roller holder on the rear row side against the bottom of the existing segment. A lifting device for an arcuate segment assembly device according to claim 3, comprising:
A pair of front and rear lifting rods connected by a connecting member are lifted and lowered in synchrony with the same stroke, and each pair of left and right lifting rods is lifted and lowered with different strokes, and the segment piece loaded on the upper end of the lifting rod is segmented by an erector device. A method of assembling an arch-shaped segment that is raised and lowered to the gripping position, adjusting the inclination of the gripping posture from side to side, and then supplying it to the erector device.