How to lay railway tracks

Abstract

To provide a method of laying railroad tracks capable of increasing the efficiency of laying work of railway tracks while reducing the construction period for railway construction, which is advantageous for cost reduction.SOLUTION: The method of laying railroad tracks includes the steps of: laying temporary rails 12A for truck-traveling, onto a place where second permanent rails 12 are to be laid; causing a truck 20 to travel on the temporary rails 12A for truck-traveling to transport precast slabs 42 and first permanent rails 10; using a self-propelled crane 22 that has multiple traveling parts 24 straddling between the temporary rails 12A for truck-traveling, so as to align, onto a location where the first permanent rails 10 are to be laid, the precast slab plates 42 on the carriage 20 to install a first precast slab row 42A; and laying the first permanent rails 10 onto the first precast slab row 42A.SELECTED DRAWING: Figure 9

Description

[Technical field]

[0001] The present invention relates to a method for laying railway track. [Background technology]

[0002] When laying double-track railway tracks, for example with the first and second tracks running parallel to each other, on the concrete deck of an viaduct, precast slabs are lined up in two rows along the extension direction of the railway track to be laid, and the first and second tracks are laid at specified lengths on top of the precast slabs that make up each row. Conventionally, for example, when laying a first track, which is one of two tracks, a rail for a bogie to run on is laid on the concrete floor slab at the position where the first track is to be laid, and then a rail for a bogie with a lifting device to run on is laid on the concrete floor slab outside the end of the rail for the bogie to run on, overlapping the end of the rail for the bogie to run on on the outside of the end of the rail for the bogie to run on. On the rails for the trolleys, a trolley loaded with precast slabs is run to transport the precast slabs, and on the rails for the trolleys with lifting mechanisms, the trolley with the lifting mechanism is moved while the lifting mechanism is used to arrange the precast slabs on the concrete floor slab. In this case, before the precast slabs are arranged on the concrete floor slab, the rails for the bogies to run on are removed, and after the precast slabs are arranged on the concrete floor slab, the removed rails are laid on top of the arranged precast slabs as the first permanent rails that form the first track. As the first track is extended, the rails for the lifting cart are removed from the concrete deck and extended and laid as rails for the lifting cart, until finally, the rails for the lifting cart are laid as the first permanent rails that make up the first track. Once the first permanent rail of a specified length has been laid in this manner, the second track is laid in the same manner, and the first track and the second track are laid every specified length. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2010-37727 A Summary of the Invention [Problem to be solved by the invention]

[0004] Therefore, in the past, when laying the first permanent rail, it was necessary to attach and remove the rail for the bogie to the concrete deck, then attach the removed rail for the bogie to the precast slab as a permanent rail, and finally attach and remove the rail for the bogie with lifting mechanism to the concrete deck. This required a total of five rail attachment and removal operations. Therefore, to lay the two permanent rails, the first and second, a total of 10 rail installation and removal operations were required, which was extremely time-consuming and disadvantageous in terms of improving the efficiency of railway track installation work. In addition, since the work of placing the precast slab on the concrete deck had to be carried out in the narrow space inside the cart with the lifting machine, the efficiency of the work of placing the precast slab on the concrete deck could not be improved, which was disadvantageous in terms of improving the efficiency of the work of laying the railway tracks. In particular, some improvement in railway construction was desired, as railway works can span tens or hundreds of kilometres, and in foreign countries even thousands of kilometres. The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide a method of laying railway tracks which is advantageous in terms of increasing the efficiency of railway track laying work, shortening the construction period for railway construction, and reducing costs. [Means for solving the problem]

[0005] In order to achieve the above-mentioned object, one embodiment of the present invention provides a first precast slab slab slab row and a second precast slab slab row by arranging precast slab slabs in two rows on a concrete floor slab, laying a first permanent rail constituting a first track on the first precast slab slab row, and when laying a second permanent rail constituting a second track on the second precast concrete row, laying a temporary rail for a trolley to run on the concrete floor slab where the second precast slab slab row is to be installed, and supporting the trolley with a plurality of running parts arranged at a position straddling the trolley running on the temporary rail. the precast slab slab is lifted from the cart by the self-propelled crane at the location where the first permanent rail is to be laid and transferred onto the concrete slab slab, the first precast slab slab row is provided on the concrete slab slab, and the first permanent rail is laid on top of the first precast slab slab row. Moreover, one embodiment of the present invention is characterized in that, once the first permanent rail has been laid to a predetermined length, the self-propelled crane is moved to the side of the laid first permanent rail, the precast slab slab is loaded onto the cart and transported by running it on the first permanent rail, the temporary rail laid at the location of the concrete floor slab where the second precast slab slab row is to be provided is removed from the concrete floor slab, the self-propelled crane, whose running part is positioned at a location straddling the cart running on the first permanent rail, hoists the precast slab slab from the cart and transports it onto the concrete floor slab, to provide the second precast slab slab row on the concrete floor slab, and the removed temporary rail is laid on top of the second precast slab slab row as the second permanent rail. In addition, one embodiment of the present invention is characterized in that the platform of the self-propelled crane is configured to allow a cart loaded with the precast slab panel to pass between the multiple running sections. In addition, one embodiment of the present invention is characterized in that the concrete deck is the concrete deck of an elevated bridge with parapets erected on both sides of its width, and the crane of the self-propelled crane is configured to include a beam that is supported on the platform so as to be horizontally rotatable and on which a horizontal-type lifting machine travels, and the beam is formed to a length that allows the horizontal-type lifting machine to travel outside the parapet while the platform is supported by a plurality of running sections arranged at a location straddling the temporary rails. In addition, one embodiment of the present invention is characterized in that the platform includes a lifting section that raises and lowers the multiple running sections between a lowered position and an elevated position, and a rocking plate that can rock between a retracted position that retracts from an upper location of the cart and a loading position that protrudes above the cart and can be placed on the cart. Furthermore, one embodiment of the present invention is characterized in that a cart equipped with a mortar filling device is run on the rail for the cart to run on, and mortar is filled between the concrete floor slab and the precast slab slab by the mortar filling device before the first permanent rail is laid on top of the first precast slab slab row. Furthermore, one embodiment of the present invention is characterized in that a cart equipped with a mortar filling device is run on the first permanent rail, and mortar is filled between the concrete floor slab and the precast slab slab by the mortar filling device before the second permanent rail is laid on top of the second row of precast slab slabs. Effect of the Invention

[0006] According to one embodiment of the present invention, when laying the first permanent rail, it is only necessary to perform a total of two rail installation operations: installing the temporary rail for the bogies to run on and installing the first permanent rail. This significantly reduces the labor required for installing and removing the rail compared to the conventional method, which requires performing the rail installation and removal operations five times, thereby improving the efficiency of railway track laying work, shortening the construction period for railway construction, and is advantageous for reducing costs. Furthermore, according to one embodiment of the present invention, when laying a second permanent rail, it is only necessary to perform the rail installation and removal work twice: removing the temporary rail for the trolley to run on, and then installing the removed temporary rail as the second permanent rail. Therefore, when laying the first permanent rail and the second permanent rail, it is only necessary to install and remove the rails a total of four times, which significantly reduces the labor required for installing and removing the rails compared to the conventional method, which requires installing and removing the rails ten times, improves the efficiency of railway track laying work, shortens the construction period for railway construction, and is advantageous for reducing costs. Furthermore, according to one embodiment of the present invention, the precast slab slab is transported and lifted and lowered at a location of the concrete floor slab where the second permanent rail will be laid, away from the location where the first permanent rail will be laid, or at a location of the concrete floor slab where the first permanent rail will be laid, away from the location where the second permanent rail will be laid. This allows the precast slab slab to be lifted and lowered in a large space, and the precast slab slabs can be installed side by side on a large concrete floor slab that is free of any parts, components, carts, hoists, etc., which improves the efficiency of the precast slab installation work and the first and second permanent rail installation work, shortens the construction period for railway construction, and is advantageous for reducing costs. In addition, according to one embodiment of the present invention, the platform of the self-propelled crane is configured to allow a cart loaded with precast slab slabs to pass between multiple running sections, so that the cart can be driven to the desired location to move the first and second permanent rails and the precast slab slab. This improves the efficiency of the installation work of the precast slab slabs and the laying work of the first and second permanent rails, shortens the construction period for railway construction, and is advantageous for reducing costs. Furthermore, according to one embodiment of the present invention, if the beam is formed to a length that allows a horizontal lifting machine to run outside the parapet of the viaduct, materials and equipment such as electric wires can be transported from the ground to the concrete deck of the viaduct using a self-propelled crane, which is advantageous in shortening the construction period of railway construction work and reducing costs. In addition, according to one embodiment of the present invention, the four oscillating plates are placed on a cart and the self-propelled crane can travel together with the cart, so that the self-propelled crane can be quickly moved when, for example, going to a temporary storage area away from the permanent rail installation site to replenish precast slab panels, which is advantageous in improving the efficiency of railway track installation work, shortening the construction period for railway construction work, and reducing costs. Furthermore, according to one embodiment of the present invention, before a first permanent rail is laid on top of the first row of precast slab slabs, mortar can be filled between the concrete floor slab and the precast slab slab from a mortar filling device mounted on a cart running on the temporary rail, and before a second permanent rail is laid on top of the second row of precast slab slabs, mortar can be filled between the concrete floor slab and the precast slab slab from a mortar filling device mounted on a cart running on the first permanent rail. [Brief description of the drawings]

[0007] [Figure 1] (A) is an explanatory diagram of the concrete deck cut on a plane perpendicular to the extension direction of the viaduct, and (B) is an explanatory diagram of the temporary rails laid on the second concrete mounting base. [Diagram 2] This is an explanatory diagram of a cart loaded with a precast slab running on a temporary rail. [Diagram 3] This is an explanatory diagram showing how a precast slab plate is lifted from a cart by a self-propelled crane and transported onto the first concrete mounting base. [Figure 4] FIG. 11 is an explanatory diagram showing how mortar is filled between the first concrete mounting base and the precast slab panel by a mortar filling device mounted on a carriage running on a virtual rail. [Diagram 5] (A) is an explanatory diagram showing the first permanent rail laid on the first precast slab slab row, and (B) is an explanatory diagram showing the temporary rail removed from the second concrete mounting base. [Figure 6]This is an explanatory diagram showing how a cart is run on the first permanent rail to transport a precast slab plate, and then the precast slab plate is hoisted from the cart by a self-propelled crane and transferred onto the second concrete mounting base. [Figure 7] FIG. 11 is an explanatory diagram showing the process of filling mortar between the second concrete mounting base and the precast slab panel using a mortar filling device mounted on a carriage running on the first permanent rail. [Figure 8] This is an explanatory diagram of the removed temporary rail laid on the second precast slab slab row as the second permanent rail. [Figure 9] FIG. 13 is a perspective view of a state in which a precast slab plate is transported by a dolly and transferred onto a first concrete mounting base by a self-propelled crane. [Figure 10] This is an explanatory diagram of the state in which the rocking plate, which has been swung to the loading position, is placed on the cart, the running part is raised to the raised position, and the self-propelled crane can move together with the cart as the cart moves. [Figure 11] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] First, an embodiment of the present invention will be described with reference to the drawings. In this embodiment, as shown in FIG. 8, a double-track railway track in which a first track and a second track extend parallel to each other is provided on a concrete deck 14 of an elevated bridge, i.e., two permanent rails, a first permanent rail 10 constituting the first track and a second permanent rail 12 constituting the second track, are provided. As shown in Figure 1(A), two concrete mounting bases, a first concrete mounting base 16 and a second concrete mounting base 18, are provided on the concrete deck 14 of the viaduct, spaced apart in the width direction of the concrete deck 14 and extending in the longitudinal direction of the concrete deck 14. Parapets (not shown) are erected on both sides of the width of the concrete deck 14, and each of the first concrete mounting base 16 and the second concrete mounting base 18 is provided with a plurality of positioning protrusions (not shown).

[0009] 1(B), a temporary rail 12A is laid on the second concrete mounting base 18 on which the second permanent rail 12 is laid. Note that, as will be described later, this temporary rail 12A is removed and used as the second permanent rail 12. As shown in FIG. 2, the temporary rail 12A allows a carriage 20 to run on it. The trolley 20 is used to load the precast slab 42 and the permanent rails onto its loading platform 2002, and a plurality of traction vehicles (not shown) are connected to the front of the traction vehicles.

[0010] As shown in FIG. 3, a self-propelled crane 22 capable of traveling along the extension direction of the temporary rail 12A is provided. As shown in FIG. 9, the self-propelled crane 22 includes a plurality of traveling units 24, a platform 26, a crane 28, a control unit (not shown), and a remote controller (not shown). Since the construction work for laying the first permanent rail 10 and the second permanent rail 12 is carried out between adjacent stations, power may be supplied to each driving unit of the self-propelled crane 22 via a power cable from the location where the station is to be constructed, or a power source vehicle may be run to supply power to each driving unit of the self-propelled crane 22, or a generator may be mounted on the self-propelled crane 22 to supply power to each driving unit of the self-propelled crane 22. As shown in Figure 9, two running sections 24 are provided on each side of the temporary rail 12A, and in this embodiment, as shown in Figure 3, two running sections 24 are provided on each side of the second concrete mounting base 18, for a total of four running sections 24. 11, each traveling unit 24 includes a drive roller 2402, a guide roller 2404, a crawler 2406 stretched across the rollers 2402, 2404, and a crawler frame 2408 supporting the rollers 2402, 2404. The crawler 2406 is rotated forward and backward by rotating the drive roller 2402 forward and backward by a crawler motor (not shown), and the crawler motor is rotated forward and backward via a control unit by an operator operating a remote controller. Note that tires may be used instead of the crawler 2406.

[0011] As shown in FIG. 10, the stand 26 includes a pair of lower side portions 30, four legs 32, a top plate 34, four lifting portions 36, and four rocking plates 38. As shown in FIG. 3, the pair of lower side portions 30 extend along the extension direction of the second concrete mount 18 above the two running portions 24 on both sides of the second concrete mount 18 . As shown in FIG. 10, a running portion 24 is disposed on the lower surface of each of both ends of the pair of lower side portions 30 in the extending direction. As shown in Figure 11, the lifting section 36 raises and lowers the running section 24, and is composed of hydraulic cylinders 3602 provided at both ends of the pair of lower side sections 30 in the extension direction, and a crawler frame 2408 of the running section 24 is respectively connected to each hydraulic cylinder 3602. The hydraulic cylinder supports the crawler 2406 so that it can be raised and lowered between a lowered position where the crawler 2406 touches the concrete floor slab 14 and an elevated position where it is raised from the lowered position. Hydraulic pressure is supplied to and discharged from the hydraulic cylinder 3602 via a hydraulic motor and hydraulic circuit (not shown), and the crawler 2406 is extended and retracted via the control unit by the worker operating a remote controller.

[0012] The four legs 32 extend upward from both ends of the lower side portion 30 in the extending direction and support a top plate 34 . As shown in FIG. 10, the four rocking plates 38 are provided two by two between the two legs 32 provided at both ends of the lower side portion 30. Each rocking plate 38 is supported by the lower side portion 30 so as to be rockable about a support shaft 40 provided on the lower side portion 30 near the leg portion 32, and is immovable in the vertical direction by the lower side portion 30 and the head 40002 of the support shaft 40. Each oscillating plate 38 oscillates between a retracted position in which it is retracted from an upper portion of the trolley 20 which runs on and extends in a straight line along the lower side portion 30, between the two legs 32, as shown in Figure 9, and a loading position in which it protrudes from the lower side portion 30 in the width direction of the second concrete mounting base 18 and can be placed on the loading platform 2002 of the trolley 20, as shown in Figure 10. The dimension between the two legs 32 on either side of the second concrete mounting base 18, the dimension between the two oscillating plates 38 located in a retracted position on either side of the second concrete mounting base 18, and the height of the underside of the top plate 34 are designed to allow the trolley 20 loaded with the precast slab plate 42 and the towing vehicle to pass through. In other words, the platform 26 is configured so that the cart 20 carrying the precast slab 42 can pass between the multiple running sections 24. When the two oscillating plates 38 provided between two of the four legs 32 are placed in the loading position and the running part 24 is raised to the raised position, the four oscillating plates 38 are placed on the loading platform 2002 of the cart 20, the self-propelled crane 22 is loaded on the cart 20, and the self-propelled crane 22 can travel together with the cart 20. In this embodiment, the rocking plate 38 is manually rocked by an operator, but it may be arbitrarily rocked between the retracted position and the placement position electrically.

[0013] As shown in FIG. 3, the crane 28 includes a beam 44 extending horizontally and supported so as to be capable of horizontal rotation, a traverse-type lifting machine 46 running along the beam 44, and a rotation mechanism 48 for rotating the beam 44. The beam 44 is supported on the top board 34 via a support column 4401 and a support shaft 4402 so as to be horizontally rotatable. The traverse-type lifting machine 46 is provided so as to be capable of traveling in the longitudinal direction of the beam 44 , and a balancer 4404 is provided at the longitudinal end of the beam 44 closer to the support shaft 4402 . The beam 44 is formed to a length that enables a horizontal-type lifting machine 46 to travel outside the parapet (not shown) on the side on which the self-propelled crane 22 is positioned when the self-propelled crane 22 is placed on the second concrete mounting base 18, that is, when the platform 26 is supported by multiple running sections 24 arranged on both sides of the temporary rail 12A, so that materials and equipment such as electric wires can be transported from the ground onto the concrete deck 14 of the viaduct. In this embodiment, as described below, even when the platform 26 is supported by a plurality of running sections 24 arranged on both sides of the first permanent rail 10, the platform 26 is formed to a length that allows a horizontal lifting machine 46 to run outside the parapet (not shown) on the side where the self-propelled crane 22 is arranged, so that materials and equipment such as electric wires can be transported from the ground onto the concrete deck 14 of the viaduct. The rotation mechanism 48 includes a motor 4802 with a reduction mechanism supported by a bracket 4406 attached to the beam 44, and a gear mechanism 4806 that is rotated by the motor 4802 and meshes with an outer peripheral gear 4804 attached to the support shaft 4402. In addition, when an operator operates a remote controller, a motor that raises and lowers the hook 4602 of the horizontal-type lifting machine 46, a horizontal motor of the horizontal-type lifting machine 46, and a motor with a reduction mechanism 4802 that constitutes the slewing mechanism 48 are driven via the control unit.

[0014] In this embodiment, as shown in Figure 3, a trolley 20 is run on the temporary rail 12A to transport the precast slab 42 and the first permanent rail 10 to the location of the temporary rail 12A near the location where the first permanent rail 10 is to be laid, and a traveling crane 28 is also moved. By operating the remote controller, a worker uses the horizontal lifting machine 46 to lift the precast slab slab 42 from the cart 20, moves the horizontal lifting machine 46, rotates the beam 44 to hoist the precast slab slab 42 onto the first concrete mounting base 16, inserts the positioning protrusion (not shown) into the positioning recess (not shown) of the precast slab slab 42, fastens the precast slab slab 42 to the first concrete mounting base 16 with bolts (not shown), and arranges the precast slab slabs 42 in a straight line on the first concrete mounting base 16 to form the first precast slab slab row 42A. Then, rail mounting brackets 50 are attached to predetermined locations on the precast slab slabs 42 constituting the first precast slab slab row 42A.

[0015] Such operations are repeated while moving the self-propelled crane 22 and running the traveling carriage 20. Once the precast slab slabs 42 have been lined up on the first concrete mounting base 16 to form a first precast slab slab row 42A of a specified length, as shown in Figure 4, a cart 20 equipped with a mortar filling device 52 is run on the temporary rails 12A to fill mortar 5202 into the gap created between the underside of the precast slab slabs 42 and the upper surface of the first concrete mounting base 16, and the precast slab slab 42 is placed on the second concrete mounting base 18. Once the precast slab panels 42 have been installed on the first concrete mounting base 16 in this manner, the first permanent rail 10 is laid on the first precast slab panel row 42A via the rail mounting brackets 50, as shown in Figure 5 (A). In this manner, the installation of the precast slab 42 and the laying of the first permanent rail 10 are repeated.

[0016] Once the first permanent rail 10 has been laid a predetermined length on the first concrete mounting base 16, for example approximately 200 m, the next step is to lay the second permanent rail 12 on the second concrete mounting base 18. 5(B), first, a temporary rail 12A having a length equivalent to the length of the second permanent rail 12 to be laid on the second concrete mounting base 18, for example a length of about 200 m, is removed from the second concrete mounting base 18. The removed temporary rail 12A is used as the second permanent rail 12. Also, as shown in Figure 6, the self-propelled crane 22 is moved from the second concrete mounting platform 18 to the first concrete mounting platform 16 by its running parts 24, and both running parts 24 are positioned on both sides of the width of the first concrete mounting platform 16. Then, the cart 20 carrying the precast slab 42 is made to run on the first permanent rail 10 for transportation.

[0017] By operating the remote controller, a worker uses the horizontal lifting machine 46 to lift the precast slab slab 42 from the cart 20, moves the horizontal lifting machine 46, rotates the beam 44 to hoist the precast slab slab 42 onto the second concrete mounting base 18, inserts the positioning protrusion (not shown) into the positioning recess (not shown) of the precast slab slab 42, places the precast slab slab 42 on the second concrete mounting base 18 and arranges it in a straight line, forming the second precast slab slab row 42B. Then, rail mounting brackets 50 are attached to predetermined locations on the precast slab slabs 42 constituting the second precast slab slab row 42B. Such operations are repeated while moving the self-propelled crane 22 and running the traveling carriage 20.

[0018] Once the precast slab slabs 42 have been arranged on the second concrete mounting base 18 to form the second precast slab slab row 42B, as shown in Figure 7, a cart 20 equipped with a mortar filling device 52 is run on the first permanent rail 10, and mortar 5202 is filled into the gap between the underside of the precast slab slab 42 and the upper surface of the second concrete mounting base 18, and the precast slab slab 42 is placed on the second concrete mounting base 18. Once the precast slab 42 has been installed on the second concrete mounting base 18 in this manner, the removed temporary rail 12A is laid as the second permanent rail 12 on the second precast slab row 42B via the rail mounting brackets 50, as shown in Figure 8. In this manner, the installation of the precast slab 42 and the laying of the second permanent rail 12 are repeated.

[0019] Once the second permanent rail 12 has been laid to a predetermined length on the second concrete mounting base 18, the work of laying the first permanent rail 10 on the first concrete mounting base 16 is carried out again. In this case, as described above, a trolley 20 is run on the temporary rail 12A on the second concrete mounting base 18 to transport the precast slab slab 42 and the first permanent rail 10 to the location where the first permanent rail 10 is to be laid, and a self-propelled crane 22 is moved onto the second concrete mounting base 18, and the installation of the precast slab slab 42 and the laying of the first permanent rail 10 are repeated. Once the first permanent rail 10 has been laid to a specified length on the first concrete mounting base 16, the work of laying the second permanent rail 12 is then carried out on the second concrete mounting base 18 in the same manner as described above, and the laying of the first permanent rail 10 and the laying of the second permanent rail 12 are carried out alternately.

[0020] According to this embodiment, when laying the first permanent rail 10, a temporary rail 12A is laid at a location on the concrete deck 14 away from the first permanent rail 10, and a cart 20 carrying a precast slab 42 is run on this temporary rail 12A to transport it, and a self-propelled crane 22 is positioned at the location where the temporary rail 12A is laid, and the first permanent rail 10 is laid at the location on the concrete deck 14 away from the temporary rail 12A. Therefore, when laying the first permanent rail 10, the rails only need to be attached twice, once for laying the first permanent rail 10 and once for laying the temporary rail 12A. This significantly reduces the labor involved in laying and removing the rails compared to the conventional method, which requires five separate work steps to be performed, thereby improving the efficiency of railway track laying work, shortening the construction period for railway construction, and providing an advantage in reducing costs.

[0021] In addition, when laying the second permanent rail 12, a cart 20 loaded with a precast slab 42 is transported by running it on the first permanent rail 10 separated from the second permanent rail 12, and a self-propelled crane 22 is positioned on the first permanent rail 10 separated from the second permanent rail 12, and the second permanent rail 12 is laid at the location of the concrete deck 14 separated from the first permanent rail 10. Therefore, when laying the second permanent rail 12, the installation and removal of the rail only needs to be done twice: by removing the temporary rail 12A and then laying the removed temporary rail 12A as the second permanent rail. This significantly reduces the labor required for installing and removing the rail compared to the conventional method, which requires five installation and removal operations, improves the efficiency of railway track installation work, shortens the construction period for railway construction, and is advantageous in reducing costs. The second permanent rail 12 may be laid in the conventional manner, but in that case the rail must be attached and removed five times, which is disadvantageous in terms of improving the efficiency of railway track laying work compared to this embodiment. Therefore, when the first permanent rail 10 and the second permanent rail 12 are laid using the method of this embodiment, the rails only need to be attached and removed a total of four times, which significantly reduces the labor involved in laying and removing the rails compared to the conventional method, which requires the rails to be attached and removed ten times, thereby improving the efficiency of railway track laying work, shortening the construction period for railway construction, and being advantageous in reducing costs.

[0022] Furthermore, when laying the first permanent rail 10, a temporary rail 12A is laid at a location on the concrete deck 14 away from the first permanent rail 10, and a cart 20 carrying a precast slab 42 is run on this temporary rail 12A for transportation, and a mobile crane 28 is positioned at the location where the temporary rail 12A is laid, and the first permanent rail 10 is laid at the location on the concrete deck 14 away from the temporary rail 12A. In addition, when laying the second permanent rail 12, a trolley 20 loaded with a precast slab 42 is run to transport the first permanent rail 10 separated from the second permanent rail 12, and a mobile crane 28 is positioned at the location where the first permanent rail 10 is laid, and the second permanent rail 12 is laid at the location of the concrete deck 14 separated from the first permanent rail 10. Therefore, compared to the conventional case in which the precast slab slab 42 was transported and the precast slab slab 42 was lifted and lowered within the limited space inside a cart with a lifting machine, in this embodiment, the precast slab slab 42 is transported and the precast slab slab 42 is lifted and lowered at a location away from the location where the permanent rails are laid, so that the precast slab slab 42 can be lifted and lowered in a wide space. Furthermore, since the precast slab slabs 42 can be lined up in a location where there are no parts or components, this improves the efficiency of the installation work of the precast slab slabs 42 and the installation work of the permanent rails, shortens the construction period for railway construction, and is advantageous for reducing costs. Railway construction projects can span tens or hundreds of kilometers, and in other countries can even span thousands of kilometers, so this embodiment is extremely advantageous in shortening the construction period of railway construction projects and reducing costs.

[0023] In addition, the platform 26 of the self-propelled crane 22 is configured so that the cart 20 carrying the precast slab 42 can pass between the multiple running sections 24. Therefore, when placing the precast slab 42 on the first and second concrete mounting bases 16, 18 or laying the first and second permanent rails 10, 12 on the precast slab 42, the trolley 20 can be run past the frame 26 to move the precast slab 42 to the desired location, which improves the efficiency of the installation work of the precast slab 42 and the laying work of the first and second permanent rails 10, 12, shortens the construction period for railway construction, and is advantageous for reducing costs.

[0024] In addition, the beam 44 is formed to a length that enables a horizontal lifting machine 46 to run on the outside of the parapet on the side where the self-propelled crane 22 is located when the platform 26 is supported by multiple running sections 24 arranged on both sides of the temporary rail 12A. This makes it possible to transport equipment such as electric wires from the ground onto the concrete deck 14 of the viaduct, which is advantageous in shortening the construction period for railway construction and reducing costs.

[0025] In addition, when the two oscillating plates 38 provided between each of the four legs 32 are placed in the loading position and the running part 24 is raised to the raised position, the four oscillating plates 38 are placed on the cart 20 and the self-propelled crane 22 can run together with the cart 20.This means that the self-propelled crane 22 can be quickly moved, for example, when going to a temporary storage area away from the permanent rail laying site to replenish precast slab panels 42, which is advantageous in improving the efficiency of railway track laying work, shortening the construction period for railway construction, and reducing costs.

[0026] In this embodiment, a case has been described in which a railway track is provided on the concrete deck 14 of an viaduct. However, the present invention is similarly applicable to cases in which railway tracks are provided not only on viaducts but also above ground or underground. Furthermore, the concrete floor slab may be any floor slab on which precast slabs can be arranged, and may be a concrete floor slab installed above ground or underground. [Explanation of symbols]

[0027] 10 First permanent rail 12 Second permanent rail 12A Temporary Rail 14 Concrete deck 16 First concrete mounting platform 18 Second Concrete Mounting Platform 20 Carts 2002 Cargo bed 22 Self-propelled crane 24 Running part 2402 Drive roller 2404 Guide roller 2406 Crawler 2408 Crawler Frame 26 Mounting stand 28 Crane 30 Lower Side 32 Legs 34 Tabletop 36 Lifting section 3602 Hydraulic cylinder 38 Swing Plate 40 Spindle 4002 Head 42 Precast slab plate 42A First precast slab column 42B 2nd precast slab column 44 Beam 4401 Post 4402 Support shaft 4404 Balancer 4406 Bracket 46 Traverse type lifting machine 4602 Hook 48 Swivel Mechanism 4802 Motor with gear reduction mechanism 4804 Peripheral gear 4806 Gear mechanism 50 Rail mounting bracket 52 Mortar filling device 5202 Mortar

Claims

1. A method for laying a first permanent rail constituting a first track on the first precast slab slab row and a second permanent rail constituting a second track on the second precast slab slab row by arranging precast slab slabs in two rows on a concrete floor slab, and laying a first permanent rail constituting a first track on the first precast slab slab row and a second permanent rail constituting a second track on the second precast slab slab row, comprising: A temporary rail for a bogie to run on is laid on the portion of the concrete floor slab where the second precast slab row is to be provided; A self-propelled crane is provided that is supported by a plurality of running parts arranged at a position straddling a carriage that runs on the temporary rail and supports a crane at a position above the carriage, and that can run along the longitudinal direction of the temporary rail; The precast slab plate and the first permanent rail are loaded onto the cart and transported by running the temporary rail; At a location where the first permanent rail is laid, the precast slab plate is lifted from the carriage by the self-propelled crane and transferred onto the concrete floor plate, thereby providing the first precast slab plate row on the concrete floor plate; The first permanent rail is laid on the first precast slab row.

1. A method for laying railway tracks comprising the steps of:

2. When the first permanent rail has been laid to a predetermined length, the self-propelled crane is moved to the side of the laid first permanent rail, The precast slab plate is loaded onto the cart and transported by running it on the first permanent rail; The temporary rails laid at the locations of the concrete slab where the second precast slab row is to be provided are removed from the concrete slab; The self-propelled crane, the running part of which is disposed at a location straddling the carriage traveling on the first permanent rail, lifts the precast slab plate from the carriage and transports it onto the concrete floor plate to provide the second precast slab plate row on the concrete floor plate; The removed temporary rail is laid on the second precast slab row as the second permanent rail.

2. A method for laying railway track according to claim 1.

3. The frame of the self-propelled crane is configured so that a cart carrying the precast slab plate can pass between the multiple running parts.

3. A method for laying a railway track according to claim 1 or 2.

4. The concrete slab is a concrete slab of an elevated bridge having a parapet on both sides in the width direction thereof, The crane of the self-propelled crane is configured to include a beam supported on the frame so as to be horizontally rotatable and on which a horizontal-traveling lifting machine travels, The beam is formed with a length that allows the horizontal lifting machine to travel outside the parapet while the platform is supported by a plurality of running parts arranged at a location across the temporary rail.

4. A method for laying railway tracks according to claim 3.

5. The frame is a lifting unit that lifts and lowers the plurality of travel units between a lowered position and an elevated position; a rocking plate that can rock between a retracted position where the rocking plate retracts from an upper portion of the dolly and a placement position where the rocking plate protrudes above the dolly and can be placed on the dolly; 5. The method of laying railway track according to claim 3, further comprising:

6. A carriage having a mortar filling device mounted thereon is run on the rail for running the carriage, before laying the first permanent rail on the first precast slab slab row, filling mortar between the concrete floor slab and the precast slab slab with the mortar filling device; 6. A method for laying a railway track according to any one of claims 1 to 5.

7. A carriage having a mortar filling device mounted thereon is run on the first permanent rail; before laying the second permanent rail on the second precast slab slab row, filling mortar between the concrete floor slab and the precast slab slab with the mortar filling device; 4. A method for laying a railway track according to claim 2 or claim 3 which cites claim 2.

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