Form Position Adjusting Mechanism, Concrete Formwork Device, and Form Position Adjusting Method

Abstract

Provided are a form position adjustment mechanism, a concrete formwork device, and a form position adjustment method that can improve convenience in adjusting the position of a form unit. 【Solution means】The form position adjustment mechanism includes a form support member that supports a form unit having a form for forming the lining concrete of a tunnel, and a drive mechanism that adjusts the position of the form unit with respect to a support device that supports the form unit by displacing the form support member. The drive mechanism has a first drive mechanism and a second drive mechanism. The form unit is displaceable to a first position, a second position for forming the lining concrete of the tunnel, and a third position spaced from the first position by more than the second position. The first drive mechanism displaces the form unit between the first position and the third position. The second drive mechanism displaces the form unit between the second position and the third position.

Description

Technical Field

[0001] The present invention relates to a form position adjustment mechanism, a concrete formwork device, and a form position adjustment method.

Background Art

[0002] For example, as disclosed in Patent Document 1, a concrete formwork device is disclosed that efficiently places tunnel lining concrete. Such a concrete formwork device includes a form unit for forming tunnel lining concrete and a support device for supporting the form unit. In the concrete formwork device, a plurality of rod jacks are installed between the support device and the form unit, so that the form unit is supported and the position of the form unit is adjusted.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, when using such a concrete formwork device, it is desired to improve the convenience in adjusting the position of the form unit.

Means for Solving the Problems

[0005] The form position adjustment mechanism for solving the above problems includes a form support member that supports a form unit having a form for molding the lining concrete of a tunnel, and a drive mechanism that adjusts the position of the form unit with respect to a support device that supports the form unit by displacing the form support member. The drive mechanism includes a first drive mechanism and a second drive mechanism. The form unit is displaceable to a first position, a second position for molding the lining concrete of the tunnel, and a third position spaced apart from the first position by more than the second position. The first drive mechanism displaces the form unit between the first position and the third position, and the second drive mechanism displaces the form unit between the second position and the third position.

[0006] The concrete formwork device for solving the above problems includes a form unit having a form for molding the lining concrete of a tunnel, a support device that supports the form unit, a form support member that supports the form unit, and a drive mechanism that adjusts the position of the form unit with respect to the support device by displacing the form support member. The drive mechanism includes a first drive mechanism and a second drive mechanism. The form unit is displaceable to a first position for molding the lining concrete of the tunnel, a second position that is more inward than the first position, and a third position that is more inward than the second position. The first drive mechanism displaces the form unit between the first position and the second position, and the second drive mechanism displaces the form unit between the second position and the third position.

[0007] The form position adjustment method for solving the above problems is a form position adjustment method using a form position adjustment mechanism including a form support member that supports a form unit having a form for forming the lining concrete of a tunnel, a first drive mechanism that adjusts the position of the form unit with respect to a support device that supports the form unit by displacing the form support member, and a second drive mechanism that adjusts the position of the form unit with respect to the support device by displacing the form support member, wherein the first drive mechanism displaces the form unit between a first position and a third position that is spaced apart from the first position by a greater distance than a second position for forming the lining concrete of the tunnel, and the second drive mechanism displaces the form unit between the second position and the third position.

Advantages of the Invention

[0008] According to the present invention, the convenience of adjusting the position of the form unit can be improved.

Brief Description of the Drawings

[0009]

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MODE FOR CARRYING OUT THE INVENTION

[0010] [First Embodiment] Hereinafter, an embodiment of a form position adjusting mechanism, a concrete formwork device, and a form position adjusting method will be described. Hereinafter, the concrete formwork device will be simply referred to as a formwork device. Hereinafter, an axis intersecting the Z-axis along the vertical direction is defined as the X-axis, and an axis intersecting the X-axis and the Z-axis is defined as the Y-axis. The direction along the X-axis is the width direction of the tunnel, which is the width of the tunnel T. The direction along the Y-axis is the extension direction of the tunnel in which the tunnel T extends. The direction along the Z-axis includes the upper Z1 and the lower Z2.

[0011] [Configuration of the formwork device 10] As shown in FIG. 1, the formwork device 10 is used to provide lining concrete on the inner peripheral surface of the tunnel T. The formwork device 10 includes a support device 11 and a form unit 12.

[0012] The support device 11 is in a portal shape, but may be in an arch shape. The support device 11 is a gantry that supports the form unit 12. The support device 11 is supported on a pair of rails R extending in the Y-axis direction on the ground of the tunnel T and is movable in the direction along the Y-axis.

[0013] The form unit 12 is supported by the support device 11 so as to form an arch shape. By placing fresh concrete between the outer peripheral surface of the form unit 12 and the inner peripheral surface of the tunnel T, the lining concrete is formed.

[0014] The form unit 12 includes a plurality of rows of forms 20. The form 20 is a member for shaping the lining concrete of the tunnel T. The plurality of rows of forms 20 are provided so as to be arranged along the Y-axis. The formwork device 10 includes seven rows of forms 20, but may include six or fewer rows or eight or more rows of forms 20.

[0015] The formwork device 10 may include a chipping device 13. The chipping device 13 includes a pair of chipping mechanisms 13A and a pair of chipping rails 13B. Each of the pair of chipping rails 13B is provided outside the support device 11. Each of the pair of chipping rails 13B is provided inside the form unit 12. Each of the pair of chipping rails 13B extends along the Y-axis.

[0016] Each of the pair of chipping mechanisms 13A is movable along the pair of chipping rails 13B while being supported by the pair of chipping rails 13B. The pair of chipping mechanisms 13A move by the driving force from a hydraulic cylinder, but may move by the driving force from a motor. A belt with an abrasive is connectable between the pair of chipping mechanisms 13A. With the abrasive disposed on the outer peripheral surface of the form unit 12, each of the pair of chipping mechanisms 13A moves along the Y-axis. Thereby, by causing the abrasive to crawl on the outer peripheral surface of the form unit 12, the outer peripheral surface of the form unit 12 is polished. Thereby, high-quality lining concrete is formed.

[0017] <Configuration of the support device 11> As shown in FIG. 2, the support device 11 includes a pair of wheel units 14, a pair of side wall units 15, and a plurality of girders 16. The support device 11 may include a pair of wheel units 14 for the front wheels and a pair of wheel units 14 for the rear wheels.

[0018] The wheel unit 14 includes wheels placed on the rail R. The wheel unit 14 supports the side wall unit 15. The wheel unit 14 may include a motor for driving the wheels.

[0019] The side wall unit 15 is supported by the wheel unit 14. The side wall unit 15 is assembled above the wheel unit 14 in the Z1 direction. The side wall unit 15 is configured to support the girder 16.

[0020] The plurality of girders 16 are provided side by side in the Y-axis direction. The girder 16 is supported by a pair of side wall units 15. The girder 16 is installed between the upper ends of a pair of side wall units 15. The girder 16 is assembled above a pair of side wall units 15 in the Z1 direction.

[0021] <Configuration of the form unit 12> Each of the plurality of rows of forms 20 includes a top form 21, a pair of side forms 22, and a pair of inverted forms 23. That is, the form unit 12 includes a plurality of rows of top forms 21 arranged side by side in the Y-axis direction, a plurality of rows of a pair of side forms 22, and a plurality of rows of a pair of inverted forms 23.

[0022] The top form 21 is provided above the support device 11 in the Z1 direction. The top form 21 is supported above the support device 11 in the Z1 direction by a top form support member 29. The top form 21 is fixed above the support device 11 in the Z1 direction via the top form support member 29.

[0023] A pair of side forms 22 are each located outside the support device 11. The pair of side forms 22 are located below the top form 21 in the Z2 direction. The ends of the pair of side forms 22 are each connected to the ends of the top form 21 via a first hinge portion 24. As a result, the side forms 22 are connected to the top form 21 so as to be rotatable about an axis extending along the Y-axis.

[0024] A pair of invert forms 23 are each located outside the support device 11. The pair of invert forms 23 are each located below the pair of side forms 22 in the Z2 direction. The ends of the pair of invert forms 23 are each connected to the ends of the pair of side forms 22 via a second hinge portion 25. The pair of invert forms 23 are connected to the side forms 22 so as to be rotatable about an axis extending along the Y-axis.

[0025] The formwork device 10 includes an upper scaffold 26. The formwork device 10 includes one upper scaffold 26, but may include two or more upper scaffolds 26 arranged along the Y-axis. The formwork device 10 may include a number of upper scaffolds 26 that is less than the number of columns of the form 20.

[0026] The upper scaffold 26 extends along the Y-axis. The upper scaffold 26 is provided so as to protrude inward from a plurality of columns of side forms 22 inside the plurality of columns of side forms 22. The upper scaffold 26 is a scaffold for workers inside the form unit 12.

[0027] The upper scaffold 26 is connected to a plurality of columns of side forms 22 so as to straddle the plurality of columns of side forms 22. The upper scaffold 26 may be provided so as to straddle seven columns of side forms 22 inside the seven columns of side forms 22.

[0028] The formwork device 10 includes a lower scaffold 27. The formwork device 10 includes two lower scaffolds 27 arranged along the Y-axis, but it may also include only one lower scaffold 27. The formwork device 10 may include three or more lower scaffolds 27 arranged along the Y-axis. The formwork device 10 may include a number of lower scaffolds 27 that is less than the number of columns of the form 20.

[0029] The lower scaffold 27 extends along the Y-axis. The lower scaffold 27 is provided at a lower position Z2 than the upper scaffold 26. The lower scaffold 27 is provided inside the multiple rows of side forms 22 so as to protrude inward from the inside of the multiple rows of side forms 22. The lower scaffold 27 is a scaffold for workers inside the form unit 12.

[0030] The lower scaffold 27 is connected to the multiple rows of side forms 22 across the multiple rows of side forms 22. Two lower scaffolds 27 may be provided so as to span seven rows of side forms 22. That is, each of the two lower scaffolds 27 may be provided so as to span four rows of side forms 22. The lower scaffold 27 corresponds to an example of a connecting member. The connecting member includes a scaffold for workers inside the form unit 12.

[0031] The formwork device 10 includes an inverted form connecting member 28. The formwork device 10 includes one inverted form connecting member 28, but it may also include two or more inverted form connecting members 28 arranged along the Y-axis. The formwork device 10 may include a number of inverted form connecting members 28 that is less than the number of columns of the form 20.

[0032] The inverted form connecting member 28 extends along the Y-axis. The inverted form connecting member 28 is provided inside the multiple rows of inverted forms 23 so as to protrude inward from the multiple rows of inverted forms 23.

[0033] The invert form connecting member 28 is connected across a plurality of rows of invert forms 23. The invert form connecting member 28 may be provided so as to span seven rows of invert forms 23. The invert form connecting member 28 corresponds to an example of a connecting member.

[0034] <Support Structure of Form Unit 12> The formwork device 10 includes a top form support member 29. The top form support member 29 is fixed to the girder member 16. The top form support member 29 supports the top form 21. The top form support member 29 is fixed to the top form 21. In this way, the top form 21 is supported by the support device 11 via the top form support member 29.

[0035] The formwork device 10 includes a pair of side form position adjusting mechanisms 30. Each of the pair of side form position adjusting mechanisms 30 is an example of a form position adjusting mechanism. The side form position adjusting mechanism 30 supports the side form 22 so as to be rotatable about an axis along the Y-axis with respect to the top form 21.

[0036] The side form position adjusting mechanism 30 adjusts the position of the side form 22 with respect to the top form 21. Thereby, the side form position adjusting mechanism 30 adjusts the position of the side form 22 with respect to the support device 11.

[0037] The formwork device 10 includes a pair of invert form position adjusting mechanisms 40. Each of the pair of invert form position adjusting mechanisms 40 is an example of a form position adjusting mechanism. The invert form position adjusting mechanism 40 supports the invert form 23 so as to be rotatable about an axis along the Y-axis with respect to the side form 22.

[0038] The invert form position adjustment mechanism 40 adjusts the position of the invert form 23 with respect to the side form 22. That is, the invert form position adjustment mechanism 40 adjusts the position of the invert form 23 with respect to the top form 21. Thereby, the invert form position adjustment mechanism 40 adjusts the position of the invert form 23 with respect to the support device 11.

[0039] As shown in FIGS. 3 and 4, the side form position adjustment mechanism 30 includes a side form support member 31. The side form support member 31 supports the side form 22. That is, the side form support member 31 supports the form unit 12. The side form support member 31 corresponds to an example of a form support member.

[0040] As shown in FIG. 3, the side form support member 31 may include two first side form support members 33 arranged along the Y-axis, two second side form support members 34 arranged along the Y-axis, and four third side form support members 35 arranged along the Y-axis. The first side form support member 33 corresponds to an example of a first support member, the second side form support member 34 corresponds to an example of a second support member, and the third side form support member 35 corresponds to an example of a third support member, respectively.

[0041] As shown in FIG. 5, the base end portion 33A of the first side form support member 33 is connected to the side wall unit 15 so as to be rotatable about an axis along the Y-axis. The tip end portion 33B of the first side form support member 33 is connected to the base end portion 34A of the second side form support member 34 so as to be rotatable about an axis along the Y-axis. Thereby, the second side form support member 34 is connected to the first side form support member 33 so as to be rotatable about an axis along the Y-axis.

[0042] At the tip 34B of the second side form support member 34, a third side form support member 35 is telescopically connected via a second side form drive mechanism 37, which will be described later. The tip 35A of the third side form support member 35 is connected to the tip 27A of the lower scaffold 27 so as to be rotatable about the direction along the Y-axis. Thereby, the third side form support member 35 is connected to the side form 22 via the lower scaffold 27.

[0043] As shown in FIGS. 3 and 4, the side form position adjusting mechanism 30 includes a side form drive mechanism 32. The side form drive mechanism 32 rotates the side form 22 with respect to the top form 21 by displacing the side form support member 31. Thereby, the side form drive mechanism 32 adjusts the position of the side form 22 with respect to the top form 21. That is, the side form drive mechanism 32 adjusts the position of the form unit 12 with respect to the support device 11.

[0044] As shown in FIG. 3, the side form drive mechanism 32 may include two first side form drive mechanisms 36 arranged along the Y-axis and four second side form drive mechanisms 37 arranged along the Y-axis. The first side form drive mechanism 36 corresponds to an example of the first drive mechanism, and the second side form drive mechanism 37 corresponds to an example of the second drive mechanism, respectively.

[0045] The number of the first side form drive mechanisms 36 may be less than the number of the second side form drive mechanisms 37. The number of the first side form drive mechanisms 36 may be less than the number of columns in a plurality of columns. The number of the first side form drive mechanisms 36 may be less than the number of columns in a predetermined column. The number of the second side form drive mechanisms 37 may be less than the number of columns in a plurality of columns. The number of the second side form drive mechanisms 37 may be less than or equal to the number of columns in a predetermined column.

[0046] As shown in FIG. 5, the first side form drive mechanism 36 is a drive mechanism for rotating the first side form support member 33 and the second side form support member 34. The first side form drive mechanism 36 is a telescopic rod-shaped jack, but an electric hoist or a chain block may be used.

[0047] The second-side form driving mechanism 37 is a driving mechanism for expanding and contracting the third-side form support member 35. The second-side form driving mechanism 37 may be a telescopic screw jack structure. The screw jack structure is driven by an electric impact wrench, but may also be manually driven by an operator.

[0048] The first-side form driving mechanism 36 may have a longer stroke than the second-side form driving mechanism 37. The second-side form driving mechanism 37 may have a greater allowable load than the first-side form driving mechanism 36.

[0049] The base end portion 36A of the first-side form driving mechanism 36 is connected to the side wall unit 15 so as to be rotatable about an axis along the Y-axis. The tip end portion 36B of the first-side form driving mechanism 36 is connected to the first-side form support member 33 so as to be rotatable about an axis along the Y-axis.

[0050] As shown in FIGS. 3 and 4, the invert form position adjusting mechanism 40 includes an invert form support member 41. The invert form support member 41 supports the invert form 23. That is, the invert form support member 41 supports the form unit 12. The invert form support member 41 corresponds to an example of a form support member.

[0051] As shown in FIG. 3, the invert form support member 41 may include two first invert form support members 43 arranged along the Y-axis, two second invert form support members 44 arranged along the Y-axis, and eight third invert form support members 45 arranged along the Y-axis. The first invert form support member 43 corresponds to an example of a first support member, the second invert form support member 44 corresponds to an example of a second support member, and the third invert form support member 45 corresponds to an example of a third support member, respectively.

[0052] As shown in FIG. 5, the base end portion 43A of the first invert form support member 43 is connected to the side wall unit 15 so as to be rotatable about an axis along the Y-axis. The tip end portion 43B of the first invert form support member 43 is connected to the base end portion 44A of the second invert form support member 44 so as to be rotatable about an axis along the Y-axis. Thereby, the second invert form support member 44 is connected to the first invert form support member 43 so as to be rotatable about an axis along the Y-axis.

[0053] A third invert form support member 45 is telescopically connected to the tip end portion 44B of the second invert form support member 44 via a second invert form drive mechanism 47 described later. The tip end portion 45A of the third invert form support member 45 is connected to the invert form connecting member 28 so as to be rotatable about an axis along the Y-axis. Thereby, the third invert form support member 45 is connected to the invert form 23 via the invert form connecting member 28.

[0054] As shown in FIGS. 3 and 4, the invert form position adjusting mechanism 40 includes an invert form drive mechanism 42. The invert form drive mechanism 42 rotates the invert form 23 with respect to the side form 22 by displacing the invert form support member 41. Thereby, the side form drive mechanism 32 adjusts the position of the invert form 23 with respect to the top form 21 and the side form 22. That is, the invert form drive mechanism 42 adjusts the position of the form unit 12 with respect to the support device 11.

[0055] As shown in FIG. 3, the invert form drive mechanism 42 may include two first invert form drive mechanisms 46 arranged along the Y-axis and eight second invert form drive mechanisms 47 arranged along the Y-axis. The first invert form drive mechanism 46 corresponds to an example of the first drive mechanism, and the second invert form drive mechanism 47 corresponds to an example of the second drive mechanism, respectively.

[0056] The number of the first invert form driving mechanisms 46 may be less than the number of the second invert form driving mechanisms 47. The number of the first invert form driving mechanisms 46 may be less than the number of columns in a plurality of columns. The number of the first invert form driving mechanisms 46 may be less than the number of columns in a predetermined column.

[0057] As shown in FIG. 5, the first invert form driving mechanism 46 is a driving mechanism for rotating the first invert form support member 43 and the second invert form support member 44. The first invert form driving mechanism 46 is a telescopic rod-shaped jack, but an electric hoist or a chain block may be used.

[0058] The second invert form driving mechanism 47 is a driving mechanism for expanding and contracting the third invert form support member 45. The second invert form driving mechanism 47 may be a telescopic screw jack structure. The screw jack structure is driven by an electric impact wrench, but may be manually driven by an operator.

[0059] The first invert form driving mechanism 46 may have a longer stroke than the second invert form driving mechanism 47. The second invert form driving mechanism 47 may have a greater allowable load than the first invert form driving mechanism 46.

[0060] The base end portion of the first invert form driving mechanism 46 is connected to the side form 22 so as to be rotatable about an axis along the Y-axis. The tip end portion 46A of the first invert form driving mechanism 46 is connected to the second invert form support member 44 so as to be rotatable about an axis along the Y-axis.

[0061] <Position adjustment of the form unit 12> The side form 22 is displaceable to a first position P11 shown in FIG. 4, a third position P13 shown in FIG. 6, and a second position P12 shown in FIGS. 7 to 9. That is, the form unit 12 is displaceable to the first position P11, the third position P13, and the second position P12.

[0062] As shown in FIG. 4, the first position P11 is a position where the side form 22 is close to the support device 11 as compared with the second position P12 and the third position P13. The first position P11 is a position where the side form 22 is accommodated.

[0063] As shown in FIG. 7, the second position P12 is a position where the side form 22 is far from the support device 11 as compared with the first position P11 and the third position P13. The second position P12 is a position for forming the lining concrete of the tunnel T.

[0064] As shown in FIG. 6, the third position P13 is a position between the first position P11 and the second position P12. The third position P13 is a position separated from the first position P11 more than the second position P12. The third position P13 is a position closer to the second position P12 than the first position P11.

[0065] Thus, the region between the second position P12 and the third position P13 is a region closer to the second position P12 as compared with the region between the first position P11 and the third position P13. The invert form 23 is displaceable to the first position P21 shown in FIGS. 4, 6 and 7, the third position P23 shown in FIG. 8, and the second position P22 shown in FIG. 9. That is, the form unit 12 is displaceable to the first position P21, the third position P23, and the second position P22.

[0066] As shown in FIG. 7, the first position P21 is a position where the invert form 23 is close to the support device 11 as compared with the second position P22 and the third position P23. The first position P21 is a position where the invert form 23 is accommodated.

[0067] The first position P21 is also a position where polishing is performed by the chamfering device 13. The first position P21 is a position where a predetermined interval is formed between the placed lining concrete and the invert form 23. The predetermined interval is an interval necessary for performing polishing by the chamfering device 13, and may be, for example, about 200 mm.

[0068] As shown in FIG. 9, the second position P22 is a position where the invert form 23 is farther from the support device 11 as compared with the first position P21 and the third position P23. The second position P22 is a position for forming the lining concrete of the tunnel T.

[0069] As shown in FIG. 8, the third position P23 is a position between the first position P21 and the second position P22. The third position P23 is a position spaced apart from the first position P21 more than the second position P22. The third position P23 is a position closer to the second position P22 than the first position P21.

[0070] Thus, the region between the second position P22 and the third position P23 is a region closer to the second position P22 as compared with the region between the first position P21 and the third position P23. As shown in FIGS. 4 and 6, the first side form driving mechanism 36 rotates the first side form support member 33 and the second side form support member 34 with respect to the support device 11. Thereby, the first side form driving mechanism 36 displaces the side form 22 between the first position P11 and the third position P13.

[0071] As shown in FIGS. 6 and 7, the second side form driving mechanism 37 expands and contracts the third side form support member 35 with respect to the second side form support member 34. Thereby, the second side form driving mechanism 37 displaces the side form 22 between the second position P12 and the third position P13.

[0072] As shown in FIGS. 7 and 8, the first invert form driving mechanism 46 rotates the first invert form support member 43 and the second invert form support member 44 with respect to the support device 11. Thereby, the first invert form driving mechanism 46 displaces the invert form 23 between the first position P21 and the third position P23.

[0073] As shown in FIGS. 8 and 9, the second invert form drive mechanism 47 expands and contracts the third invert form support member 45 with respect to the second invert form support member 44. Thereby, the second invert form drive mechanism 47 displaces the invert form 23 between the second position P22 and the third position P23.

[0074] <Form installation process> Here, the form installation process will be described with reference to FIG. 10. The form installation process is a process that is performed after the form unit 12 is supported by the support device 11 by the top form support member 29 in a state where the support device 11 is installed on the rail R.

[0075] As shown in FIG. 10, in step S11, a support member installation process is performed. In this process, the side form support member 31, the side form drive mechanism 32, the invert form support member 41, and the invert form drive mechanism 42 are installed on the support device 11 and the form unit 12.

[0076] In step S12, a side form third position drive process is performed. In this process, by driving the first side form drive mechanism 36, the side form support member 31 rotates, and the side form 22 is displaced from the first position P11 to the third position P13.

[0077] In step S13, a side form second position drive process is performed. In this process, by driving the second side form drive mechanism 37, the third side form support member 35 extends, and the side form 22 is displaced from the third position P13 to the second position P12.

[0078] In step S14, an invert form third position drive process is performed. In this process, by driving the first invert form drive mechanism 46, the invert form support member 41 rotates, and the invert form 23 is displaced from the first position P21 to the third position P23.

[0079] In step S15, an invert form second position driving process is performed. In this process, due to the driving of the second invert form driving mechanism 47, the third invert form support member 45 extends, and the invert form 23 is displaced from the third position P23 to the second position P22.

[0080] <Form demolding process> Next, with reference to FIG. 11, the form demolding process will be described. The form demolding process is a process performed after the covering concrete is placed in a state where the support device 11 is installed on the rail R and the form unit 12 is supported by the support device 11 by the top form support member 29.

[0081] As shown in FIG. 11, in step S21, an invert form third position driving process is performed. In this process, due to the driving of the second invert form driving mechanism 47, the third invert form support member 45 contracts, and the invert form 23 is displaced from the second position P22 to the third position P23.

[0082] In step S22, an invert form first position driving process is performed. In this process, due to the driving of the first invert form driving mechanism 46, the invert form support member 41 rotates, and the invert form 23 is displaced from the third position P23 to the first position P21.

[0083] In step S23, a side form third position driving process is performed. In this process, due to the driving of the second side form driving mechanism 37, the third side form support member 35 contracts, and the side form 22 is displaced from the second position P12 to the third position P13.

[0084] In step S24, a side form first position driving process is performed. In this process, due to the driving of the first side form driving mechanism 36, the side form support member 31 rotates, and the side form 22 is displaced from the third position P13 to the first position P11.

[0085] In step S25, a mold release position adjustment process is performed. In this process, the support device 11 is jacked down. As a result, the form unit 12 is demolded from the placed covering concrete. The distance between the outer peripheral surfaces of the top form 21 and the side form 22 and the covering concrete becomes a predetermined distance or more, but the distance between the outer peripheral surfaces of the top form 21 and the side form 22 and the inner peripheral surface of the tunnel T may also become a predetermined distance or more. Then, the support device 11 may be moved in the extension direction Y.

[0086] In step S26, a side form third position driving process is performed. In this process, due to the driving of the first side form driving mechanism 36, the side form support member 31 rotates, and the side form 22 is displaced from the first position P11 to the third position P13.

[0087] In step S27, a side form second position driving process is performed. In this process, due to the driving of the second side form driving mechanism 37, the third side form support member 35 extends, and the side form 22 is displaced from the third position P13 to the second position P12.

[0088] In step S28, a chamfering process is performed. In this process, a belt with an abrasive is connected to the chamfering device 13. With the abrasive arranged on the outer peripheral surface of the form unit 12, the chamfering device 13 moves along the Y axis. As a result, the outer peripheral surface of the form unit 12 is polished. In this way, after the inverted form 23 is displaced from the second position P22 to the first position P21, the outer peripheral surface of the form unit 12 is polished.

[0089] In step S29, a side form third position driving process is performed. In this process, due to the driving of the second side form driving mechanism 37, the third side form support member 35 contracts, and the side form 22 is displaced from the second position P12 to the third position P13.

[0090] In step S30, the side form first position driving process is performed. In this process, due to the driving of the first side form driving mechanism 36, the side form support member 31 rotates, and the side form 22 is displaced from the third position P13 to the first position P11.

[0091] In step S31, the placing position adjustment process is performed. In this process, the support device 11 is moved along the extension direction Y to the next placing position. Then, the support device 11 is jacked up. And by performing the same processes as steps S12 to S15 in FIG. 10, it becomes possible to place the covering concrete at the next placing position.

[0092] Thus, in the form position adjustment method, by using the side form position adjustment mechanism 30 and the invert form position adjustment mechanism 40, the position of the form unit 12 is adjusted. Specifically, each of the first driving mechanisms 36, 46 displaces the side form 22 and the invert form 23 between the first positions P11, P21 and the third positions P13, P23. Each of the second driving mechanisms 37, 47 displaces the side form 22 and the invert form 23 between the second positions P12, P22 and the third positions P13, P23.

[0093] <Actions and Effects of the First Embodiment> The actions and effects of the first embodiment will be described. (1-1) The first driving mechanisms 36, 46 displace the side form 22 and the invert form 23 between the first positions P11, P21 and the third positions P13, P23. The second driving mechanisms 37, 47 displace the side form 22 and the invert form 23 between the second positions P12, P22 and the third positions P13, P23. According to this configuration, in the regions close to and far from the second positions P12, P22 for forming the covering concrete, the operator can intentionally adjust the positions of the side form 22 and the invert form 23 by different driving mechanisms. Therefore, the convenience of adjusting the position of the form unit 12 can be improved.

[0094] (1-2) In a region far from the second positions P12 and P22, the first drive mechanisms 36 and 46, which have a smaller allowable load but a longer stroke than the second drive mechanisms 37 and 47, are used. In a region close to the second positions P12 and P22, the second drive mechanisms 37 and 47, which have a shorter stroke but a larger allowable load than the first drive mechanisms 36 and 46, are used. According to this configuration, the positions of the side form 22 and the invert form 23 can be efficiently adjusted between the first positions P11 and P21 and the third positions P13 and P23. On the other hand, the pressure resistance from the covering concrete to the side form 22 and the invert form 23 can be improved between the second positions P12 and P22 and the third positions P13 and P23. Therefore, the convenience of adjusting the position of the form unit 12 can be improved.

[0095] (1-3) The first drive mechanisms 36 and 46 displace the side form 22 and the invert form 23 between the first positions P11 and P21 and the third positions P13 and P23 by rotating the second support members 34 and 44 with respect to the first support members 33 and 43. The second drive mechanisms 37 and 47 displace the side form 22 and the invert form 23 between the second positions P12 and P22 and the third positions P13 and P23 by expanding and contracting the third support members 35 and 45 with respect to the second support members 34 and 44. According to this configuration, in a region far from the second positions P12 and P22, the positions of the side form 22 and the invert form 23 can be efficiently adjusted between the first positions P11 and P21 and the third positions P13 and P23 by the rotation of the first support members 33 and 43 and the second support members 34 and 44. On the other hand, in a region close to the second positions P12 and P22, the pressure resistance from the covering concrete to the side form 22 and the invert form 23 can be improved between the second positions P12 and P22 and the third positions P13 and P23 by the expansion and contraction of the third support members 35 and 45. Therefore, the convenience of adjusting the position of the form unit 12 can be improved.

[0096] (1-4) The lower scaffold 27 is connected across the side forms 22 of adjacent predetermined columns among the plurality of columns of side forms 22 arranged along the Y-axis. A side form support member 31 is connected to the lower scaffold 27. According to this configuration, the side form support member 31 can stably support the side forms 22 of the predetermined column via the lower scaffold 27. Therefore, the convenience for adjusting the position of the form unit 12 can be improved.

[0097] (1-5) The lower scaffold 27 is not only used as a scaffold for workers, but also can enhance the alignment of the side forms 22 of the predetermined column and stably support the side forms 22 of the predetermined column. Therefore, the convenience for adjusting the position of the form unit 12 can be improved.

[0098] (1-6) An invert form connecting member 28 is connected across the plurality of columns of invert forms 23 arranged along the Y-axis. An invert form support member 41 is connected to the invert form connecting member 28. According to this configuration, the invert form support member 41 can stably support the plurality of columns of invert forms 23 via the invert form connecting member 28. Therefore, the convenience for adjusting the position of the form unit 12 can be improved.

[0099] (1-7) The number of the first side form driving mechanisms 36 is less than the number of columns of the side forms 22 of the predetermined column. According to this configuration, the number of the first side form driving mechanisms 36 can be reduced by connecting the side form support member 31 to the lower scaffold 27.

[0100] (1-8) The number of the second side form driving mechanisms 37 is less than the number of columns of the plurality of columns of side forms 22. According to this configuration, the number of the second side form driving mechanisms 37 can be reduced by connecting the side form support member 31 to the lower scaffold 27.

[0101] (1-9) The number of the first invert form drive mechanisms 46 is less than the number of columns of the multi-column invert forms 23. According to this configuration, by connecting the invert form support member 41 to the invert form connecting member 28, the number of the first invert form drive mechanisms 46 can be reduced.

[0102] (1-10) After displacing the invert form 23 from the second position P22 to the first position P21, the outer peripheral surface of the form unit 12 is polished. According to this configuration, by displacing the invert form 23 from the second position P22 to the first position P21, a space for polishing the outer peripheral surface of the form unit 12 can be secured. Therefore, the convenience regarding the position adjustment of the form unit 12 can be improved.

[0103] [Second Embodiment] Next, the second embodiment will be described. In the following description, for the same configurations as those of the already described embodiments, the overlapping descriptions will be omitted or simplified, and the configurations different from the already described embodiments will be described.

[0104] As shown in FIG. 12, in the second embodiment, the first invert form support member 43 may be connected to the side form support member 31 so as to be rotatable about an axis along the Y-axis instead of the side wall unit 15. Specifically, although the first invert form support member 43 is connected to the first side form support member 33, it may be connected to the second side form support member 34 or the third side form support member 35.

[0105] [Third Embodiment] Next, the third embodiment will be described. As shown in FIG. 13, in the third embodiment, the side form support member 31 may include a fourth side form support member 38. The fourth side form support member 38 is connected to the first side form drive mechanism 36 and the second side form support member 34 so as to be rotatable about an axis along the Y-axis, but it may be connected to the first side form drive mechanism 36 and the first side form support member 33.

[0106] The first side form driving mechanism 36 may be connected to the lower scaffold 27 so as to be rotatable about an axis along the Y-axis. The first side form driving mechanism 36 is connected to the fourth side form support member 38 so as to be rotatable about an axis along the Y-axis.

[0107] The first side form support member 33 is connected to the lower scaffold 27 and the second side form support member 34 so as to be rotatable about an axis along the Y-axis. The third side form support member 35 is connected to the side wall unit 15 so as to be rotatable about an axis along the Y-axis.

[0108] The first invert form support member 43 is connected to the lower scaffold 27 so as to be rotatable about an axis along the Y-axis. Specifically, the first invert form support member 43 is connected to the bottom surface of the lower scaffold 27.

[0109] [Fourth Embodiment] Next, the fourth embodiment will be described. As shown in FIG. 14, in the fourth embodiment, the first side form driving mechanism 36 may be connected between the side form support members 31 so as to be rotatable about an axis along the Y-axis. Specifically, the first side form driving mechanism 36 is connected to the first side form support member 33 and the third side form support member 35, but may be connected to the first side form support member 33 and the second side form support member 34.

[0110] The first invert form driving mechanism 46 may be connected between the invert form support members 41 so as to be rotatable about an axis along the Y-axis. Specifically, the first invert form driving mechanism 46 is connected to the first invert form support member 43 and the second invert form support member 44, but may be connected to the first invert form support member 43 and the third invert form support member 45.

[0111] [Modification Example] This embodiment can be implemented with the following modifications. This embodiment and the following modification examples can be implemented in combination with each other within a technically consistent range.

[0112] · In the form installation process and the form removal process, the order of the processes may be appropriately changed, or the processes may be performed in parallel. For example, in the form removal process, instead of performing steps S27 and S29, after step S26 is completed, step S28 may be performed, and then step S30 may be performed. Thereby, after the side form 22 is displaced to the third position P23, the outer peripheral surface of the form unit 12 may be polished. For example, in the form removal process, a chiseling process may be performed at the position where the covering concrete is formed. For example, the installation and removal of the side form support member 31, the side form drive mechanism 32, the invert form support member 41, and the invert form drive mechanism 42 may be performed in any order.

[0113] · The formwork device 10 may not include the upper scaffold 26. That is, the lower scaffold 27 may simply be a scaffold. The lower scaffold 27 may be an example of a connecting member that is not a scaffold. The side form support member 31 may be connected to the upper scaffold 26. The upper scaffold 26 may be an example of a connecting member that is not a scaffold. The invert form connecting member 28 may be a scaffold.

[0114] · The upper scaffold 26 may be connected across the side forms 22 of a predetermined row adjacent to each other along the Y-axis inside the form unit 12. The side forms 22 of the predetermined row may be multiple rows of side forms 22, or may be two or more rows of side forms 22 less than multiple rows.

[0115] · The lower scaffold 27 may be connected across the side forms 22 of a predetermined row adjacent to each other along the Y-axis inside the form unit 12. The side forms 22 of the predetermined row may be multiple rows of side forms 22, or may be two or more rows of side forms 22 less than multiple rows.

[0116] ·At least one of the side form support member 31, the side form drive mechanism 32, the invert form support member 41, and the invert form drive mechanism 42 may be connected to the wheel unit 14 or the girder member 16 instead of the side wall unit 15 with respect to the support device 11.

[0117] ·The invert form connecting member 28 may be connected across the invert forms 23 in a predetermined row adjacent along the Y axis inside the form unit 12. The predetermined row of invert forms 23 may be multiple rows of invert forms 23, or may be two or more rows of invert forms 23 less than multiple rows.

[0118] ·The number of the first side form support members 33 may be any number, and may be 1, 4, or 8. That is, the number of the first side form support members 33 may be less than the number of rows of multiple rows, and may also be less than the number of rows of a predetermined row.

[0119] ·The number of the second side form support members 34 may be any number, and may be 1, 4, or 8. That is, the number of the second side form support members 34 may be less than the number of rows of multiple rows, and may also be less than the number of rows of a predetermined row.

[0120] ·The number of the third side form support members 35 may be any number, and may be 1, 2, or 8. That is, the number of the third side form support members 35 may be less than the number of rows of multiple rows, and may also be less than the number of rows of a predetermined row.

[0121] ·The number of the first invert form support members 43 may be any number, and may be 1, 4, or 8. That is, the number of the first invert form support members 43 may be less than the number of rows of multiple rows, and may also be less than the number of rows of a predetermined row.

[0122] · The number of the second invert form support members 44 may be any number, and may be 1, 2, or 8. That is, the number of the second invert form support members 44 may be less than the number of columns of the multiple columns, and may also be less than the number of columns of a predetermined column.

[0123] · The number of the third invert form support members 45 may be any number, and may be 1, 2, or 4. That is, the number of the third invert form support members 45 may be less than the number of columns of the multiple columns, and may also be less than the number of columns of a predetermined column.

[0124] · The side form support members 31 may be configured to include any number of members. The side form support members 31 may be configured to include 2 or 4 or more members.

[0125] · The invert form support member 41 may be configured to include any number of members. The invert form support member 41 may be configured to include 2 or 4 or more members.

[0126] · The number of the first side form drive mechanisms 36 may be any number. The number of the first side form drive mechanisms 36 may be, for example, 4. The number of the first side form drive mechanisms 36 may be, for example, 8.

[0127] · The number of the second side form drive mechanisms 37 may be any number. The number of the second side form drive mechanisms 37 may be, for example, 8. The number of the second side form drive mechanisms 37 may be, for example, 2. That is, the number of the second side form drive mechanisms 37 may be less than the number of columns of the form 20.

[0128] · The number of the first invert form drive mechanisms 46 may be any number. The number of the first invert form drive mechanisms 46 may be, for example, 4. The number of the first invert form drive mechanisms 46 may be, for example, 8.

[0129] · The number of the second invert form driving mechanisms 47 may be any number. For example, the number of the second invert form driving mechanisms 47 may be four. For example, the number of the second invert form driving mechanisms 47 may be two. That is, the number of the second invert form driving mechanisms 47 may be less than the number of columns of the form 20.

[0130] · The first side form driving mechanism 36 and the first invert form driving mechanism 46 may adopt any driving method. For example, a hydraulic cylinder may be used. The second side form driving mechanism 37 and the second invert form driving mechanism 47 may adopt any driving method. For example, a double-threaded screw may be used.

[0131] · The allowable load of the first side form driving mechanism 36 may be the same as that of the second side form driving mechanism 37, or may be larger than that of the second side form driving mechanism 37. The stroke of the second side form driving mechanism 37 may be the same as that of the first side form driving mechanism 36, or may be longer than that of the first side form driving mechanism 36.

[0132] · The allowable load of the first invert form driving mechanism 46 may be the same as that of the second invert form driving mechanism 47, or may be larger than that of the second invert form driving mechanism 47. The stroke of the second invert form driving mechanism 47 may be the same as that of the first invert form driving mechanism 46, or may be longer than that of the first invert form driving mechanism 46.

[0133] · As the form position adjustment mechanism, it may be adopted by either one of the side form position adjustment mechanism 30 and the invert form position adjustment mechanism 40, and may not be adopted by the other one of the side form position adjustment mechanism 30 and the invert form position adjustment mechanism 40.

[0134] · As used herein, the expression "at least any one" means one or more of the desired options. As an example, the expression "at least any one" as used herein means only one option or both of the two options if the number of options is two. As another example, the expression "at least any one" as used herein means only one option or any combination of two or more options if the number of options is three or more.

[0135] [Appendix] The technical ideas grasped from the above-described embodiments and modified examples are described below. These technical ideas can be combined with each other as long as they are not technically contradictory.

[0136] [1] The form position adjustment mechanism includes a form support member that supports a form unit having a form for forming the lining concrete of the tunnel, and a drive mechanism that adjusts the position of the form unit with respect to a support device that supports the form unit by displacing the form support member. The drive mechanism has a first drive mechanism and a second drive mechanism. The form unit is displaceable to a first position, a second position for forming the lining concrete of the tunnel, and a third position spaced from the first position by a greater distance than the second position. The first drive mechanism displaces the form unit between the first position and the third position, and the second drive mechanism displaces the form unit between the second position and the third position.

[0137] [2] For the above-described form position adjustment mechanism, the first drive mechanism has a longer stroke than the second drive mechanism, and the second drive mechanism has a greater allowable load than the first drive mechanism.

[0138] [3] For the above-described form position adjustment mechanism, the form has a top form and a side form that is connected to the top form so as to be rotatable about an axis extending in the longitudinal direction of the tunnel. The form support member supports the side form.

[0139] [4] The above form position adjustment mechanism, wherein the form includes a top form, a side form connected to the top form, and an invert form connected to the side form so as to be rotatable about an axis extending in the extension direction of the tunnel. The form support member supports the invert form.

[0140] [5] The above form position adjustment mechanism, wherein the form support member includes a first support member, a second support member connected to the first support member so as to be rotatable about an axis along the extension direction of the tunnel, and a third support member connected to the second support member so as to be telescopic. The third support member is connected to the support device or the form unit. The first drive mechanism displaces the form unit between the first position and the third position by rotating the second support member with respect to the first support member. The second drive mechanism displaces the form unit between the second position and the third position by expanding and contracting the third support member with respect to the second support member.

[0141] [6] The above form position adjustment mechanism, wherein, inside the form unit having a plurality of rows of the forms arranged in the extension direction of the tunnel, the form support member is connected to a connecting member that is connected across at least a predetermined row of the forms adjacent to each other in the extension direction among the plurality of rows of the forms.

[0142] [7] The above form position adjustment mechanism, wherein the connecting member includes a work platform inside the form unit. [8] The above form position adjustment mechanism, wherein the drive mechanism has a number of the first drive mechanisms that is less than the number of rows of the plurality of rows of the forms.

[0143] [9] The concrete formwork device includes a form unit having a form for molding the tunnel lining concrete, a support device for supporting the form unit, a form support member for supporting the form unit, and a drive mechanism for adjusting the position of the form unit with respect to the support device by displacing the form support member. The drive mechanism has a first drive mechanism and a second drive mechanism. The form unit is displaceable to a first position for molding the tunnel lining concrete, a second position inside the first position, and a third position inside the second position. The first drive mechanism displaces the form unit between the first position and the second position, and the second drive mechanism displaces the form unit between the second position and the third position.

[0144]

[10] The form position adjustment method is a form position adjustment method using a form position adjustment mechanism including a form support member for supporting a form unit having a form for molding the tunnel lining concrete, a first drive mechanism for adjusting the position of the form unit with respect to the support device by displacing the form support member, and a second drive mechanism for adjusting the position of the form unit with respect to the support device by displacing the form support member. The method includes displacing the form unit by the first drive mechanism between a first position and a third position spaced from the first position by a second position for molding the tunnel lining concrete, and displacing the form unit by the second drive mechanism between the second position and the third position.

[0145]

[11] The above form position adjustment method, wherein the form includes a top form, a side form connected to the top form, and an invert form connected to the side form so as to be rotatable about an axis extending in the extension direction of the tunnel. The form support member supports the invert form. After the second drive mechanism displaces the invert form from the second position to the third position and the first drive mechanism displaces the invert form from the third position to the first position, the outer peripheral surface of the form unit is polished.

Explanation of reference numerals

[0146] 10... formwork device, 11... support device, 12... form unit, 13... chaining device, 20... form, 21... top form, 22... side form, 23... invert form, 27... lower scaffold, 28... invert form connecting member, 30... side form position adjustment mechanism, 31... side form support member, 32... side form drive mechanism, 33... first side form support member, 34... second side form support member, 35... third side form support member, 36... first side form drive mechanism, 37... second side form drive mechanism, 40... invert form position adjustment mechanism, 41... invert form support member, 42... invert form drive mechanism, 43... first invert form support member, 44... second invert form support member, 45... third invert form support member, 46... first invert form drive mechanism, 47... second invert form drive mechanism, P11... first position, P12... second position, P13... third position, P21... first position, P22... second position, P23... third position, T... tunnel.

Claims

1. a form support member for supporting a form unit having a form for forming a tunnel lining concrete; a drive mechanism for displacing the foam support member to adjust the position of the foam unit relative to a support device supporting the foam unit; the drive mechanism includes a first drive mechanism and a second drive mechanism, The foam unit is displaceable between a first position in which the foam unit is housed, a second position for forming a lining concrete for a tunnel, and a third position that is spaced apart from the first position with respect to the second position; the first drive mechanism displaces the foam unit between the first position and the third position; The second drive mechanism displaces the foam unit between the second position and the third position.

2. 2. The foam alignment mechanism of claim 1, The first drive mechanism has a longer stroke than the second drive mechanism, The second drive mechanism has a larger allowable load than the first drive mechanism.

3. 2. The foam alignment mechanism of claim 1, The form includes a top form and a side form connected to the top form so as to be rotatable about an axis extending in an extension direction of the tunnel, The foam support member supports the side foam. Foam position adjustment mechanism.

4. 2. The foam alignment mechanism of claim 1, The form includes a top form, a side form connected to the top form, and an invert form connected to the side form so as to be rotatable about an axis extending in the extension direction of the tunnel, The foam support member supports the invert foam, a foam position adjustment mechanism.

5. The form position adjustment mechanism according to any one of claims 1 to 4, The foam support member includes a first support member, a second support member connected to the first support member so as to be rotatable about an axis along an extension direction of the tunnel, and a third support member connected to the second support member so as to be extendable and contractible; the third support member is connected to the support device or the foam unit; the first drive mechanism displaces the foam unit between the first position and the third position by rotating the second support member relative to the first support member; A foam position adjustment mechanism, wherein the second drive mechanism displaces the foam unit between the second position and the third position by extending and retracting the third support member relative to the second support member.

6. The form position adjustment mechanism according to any one of claims 1 to 4, A foam position adjustment mechanism in which, inside the foam unit having multiple rows of foam lined up in the extension direction of the tunnel, the foam support member is connected to a connecting member that connects across at least certain rows of foams adjacent to each other in the extension direction among the multiple rows of foams.

7. 7. The form alignment mechanism of claim 6, A form positioning mechanism, wherein the connecting member includes a worker's foothold inside the form unit.

8. 7. The form alignment mechanism of claim 6, A form position adjustment mechanism, wherein the drive mechanism has a number of the first drive mechanisms that is less than the number of rows of the forms.

9. a form unit having a form for forming a tunnel lining concrete; a support device for supporting the foam unit; a foam support member for supporting the foam unit; a drive mechanism for adjusting the position of the foam unit relative to the support device by displacing the foam support member; the drive mechanism includes a first drive mechanism and a second drive mechanism, The foam unit is displaceable between a first position in which the foam unit is housed, a second position for forming a lining concrete for a tunnel, and a third position that is spaced apart from the first position with respect to the second position, the first drive mechanism displaces the foam unit between the first position and the second position; The second drive mechanism displaces the form unit between the second position and the third position.

10. A form position adjustment method using a form position adjustment mechanism, the method comprising: a form support member supporting a form unit having a form for forming a tunnel lining concrete; a first drive mechanism for adjusting a position of the form unit relative to a support device supporting the form unit by displacing the form support member; and a second drive mechanism for adjusting a position of the form unit relative to the support device by displacing the form support member, The first drive mechanism displaces the form unit between a first position in which the form unit is housed and a third position that is farther away from the first position than a second position for forming a lining concrete for a tunnel; the second drive mechanism displacing the foam unit between the second position and the third position.

11. 11. The foam alignment method of claim 10, further comprising the steps of: The form includes a top form, a side form connected to the top form, and an invert form connected to the side form so as to be rotatable about an axis extending in the extension direction of the tunnel, The foam support member supports the invert foam, A form position adjustment method including: polishing an outer peripheral surface of the form unit after the second driving mechanism displaces the invert form from the second position to the third position and the first driving mechanism displaces the invert form from the third position to the first position.

Images