Temporary sleepers and temporary sleeper sets

Abstract

Maintain a constant gauge between a pair of temporary rails. [Solution] The temporary sleeper 100 comprises a plate-shaped bottom 1 extending in a predetermined direction Dp, and a pair of plate-shaped side portions 2, 2 erected on both end portions of the bottom 1. The bottom 1 is provided with an elongated through-hole 3 extending in the predetermined direction Dp, and a pair of rail support portions 4, 4 are provided on the tip surfaces of the pair of side portions 2, 2 for positioning and supporting the temporary rail in the rail extension direction Dr that is parallel to the bottom surface 1a of the bottom 1 and perpendicular to the predetermined direction Dp, and the pair of rail support portions 4, 4 are each formed in a temporary rail storage space having a flat bottom surface of a predetermined height and width from the bottom surface 1a of the bottom 1, and inner wall surfaces that sandwich the bottom surface.

Description

[Technical Field]

[0001] The present invention relates to a temporary sleeper and a temporary sleeper set. [Background technology]

[0002] Sleepers have been known for some time. Generally, sleepers are provided to support two rails, spread wheel pressure over a wide area to transmit it to the track bed, and maintain a constant gauge (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 3-119203 Summary of the Invention [Problem to be solved by the invention]

[0004] Tunnel construction requires work such as earthmoving and material transportation depending on the work stage. These tasks are performed using machinery, and temporary rails are laid to allow these machinery to move within the tunnel. In particular, in the case of road tunnel construction, a road is built within the tunnel. In this case, the road within the tunnel is paved with concrete. To allow the movement of such concrete paving equipment, a pair of temporary rails is laid on both sides of the road under construction. Therefore, each of the temporary sleepers supporting the pair of temporary rails supports one of the temporary rails. Conventionally, such temporary sleepers are installed temporarily, and therefore have been manufactured using appropriate materials and used appropriately. Therefore, conventional temporary sleepers for road tunnels have not necessarily addressed the problems that arise when a pair of temporary sleepers each supports one of a pair of temporary rails.

[0005] The present invention has been made to solve the above-mentioned problems, and aims to provide a temporary sleeper and temporary sleeper set that can maintain a constant gauge between a pair of temporary rails. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, a temporary sleeper according to one embodiment of the present invention is a temporary sleeper that supports temporary rails laid along a gutter of a road extending through a tunnel under construction, and comprises a plate-shaped bottom extending in a predetermined direction and a pair of plate-shaped side portions erected at both ends of the bottom, the bottom being provided with a long-hole-shaped through hole extending in the predetermined direction, and a pair of rail support portions being provided on the tip surfaces of the pair of side portions, respectively, for positioning and supporting the temporary rail in the rail extension direction that is parallel to the main surface of the bottom and perpendicular to the predetermined direction, and the pair of rail support portions are formed in a temporary rail storage space that has a flat bottom surface of a predetermined height and width from the bottom surface of the bottom and inner wall surfaces that sandwich the bottom surface.

[0007] The temporary sleepers constructed in this way are temporarily installed along the side ditches of roads that extend through tunnels under construction and are paved with concrete but have no curbs installed. The surface of the concrete-paved road is finished with a broom pattern.

[0008] On the other hand, in this temporary sleeper, the elongated through-hole is provided in advance so as to be located at a predetermined through-hole position in a predetermined direction based on a predetermined end of the bottom, which corresponds to the position of a gutter in the road specifications, for example. Also, a pair of rail support parts are provided in advance so as to be located at predetermined support part positions based on the position of the through-hole in the predetermined direction, which corresponds to the temporary rail laying specifications, and a temporary rail storage space is formed having a flat bottom surface at a predetermined height and with a predetermined width from the bottom surface of the bottom part, and inner wall surfaces sandwiching the bottom surface.

[0009] Then, an engaging member that engages with the gutter is prepared, and the extension direction (predetermined direction) of the bottom is aligned with the width direction of the road, and the engaging member is fixed (attached) around the through hole so that when the temporary sleeper is placed on the edge of the road, for example, by aligning a predetermined end of the bottom to a position approximately 20 mm from the side edge of the road, the engaging member engages with the gutter in the predetermined direction.

[0010] The temporary sleeper with the engaging member attached around the through-hole is then placed on the edge of the road so that the direction of extension of the bottom coincides with the width direction of the road and a predetermined end of the bottom is aligned approximately 20 mm from the side edge of the road, whereby the engaging member is inserted into the road gutter. One of the pair of temporary rails is then laid on the pair of rail support parts. Similarly, for the other of the pair of temporary rails, the temporary sleeper is placed on the other edge of the road and the other temporary rail is laid on the pair of rail support parts of the temporary sleeper. As is well known, when a concrete paving machine runs over the pair of temporary rails in this state, due to the wheel structure, a force is applied from the wheel to the temporary sleeper, pushing one of the temporary rails, and ultimately the pair of rail support parts, toward the side of the road. However, the temporary sleeper generates a reaction force against the force pushing toward the side of the road when the engaging member engages with the road gutter. This allows the temporary sleepers to maintain a constant gauge between a pair of temporary rails.

[0011] The pair of rail support portions may each be provided at a predetermined support portion position based on the position of the through hole in the predetermined direction.

[0012] According to this configuration, by appropriately selecting the predetermined positions of the support parts, the pair of rail support parts can be positioned in a preferred position above the side gutter (for example, a position near the reinforcing bar).

[0013] The temporary rail Containment The space may be formed in a cutout portion having a bottom surface at the predetermined height from the bottom surface of the bottom portion and an inner side surface of the predetermined width as the inner wall surface.

[0014] With this configuration, the pressing force acting on the temporary rail in a predetermined direction (towards the side of the road) can be strongly repelled by the inner surface of the cutout portion formed by cutting out the side of the temporary sleeper.

[0015] The height of the portions of the pair of side portions located near the other end of the bottom may be formed to decrease as the portion approaches the other end of the bottom.

[0016] This configuration allows the temporary sleepers to be made lighter.

[0017] A temporary sleeper set according to another embodiment of the present invention comprises the temporary sleeper, an engaging member that engages with the gutter, and a fixing device that fixes the engaging member around the through hole in the bottom of the temporary sleeper.

[0018] According to this configuration, the temporary sleeper can be engaged with the gutter by fixing the engaging member with a fastener around the through hole in the bottom of the temporary sleeper. [Effects of the Invention]

[0019] The present invention has the effect of providing a temporary sleeper and a temporary sleeper set that can maintain a constant gauge between a pair of temporary rails. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 1 is a perspective view showing an example of the configuration of a temporary sleeper according to the first embodiment of the present invention. [Figure 2] FIG. 2 is a three-view drawing showing the configuration of the temporary sleeper of FIG. [Figure 3] FIG. 3 is a diagram showing a temporary sleeper set according to the first embodiment of the present invention. [Figure 4] FIG. 4 is an exploded view showing the configuration of the temporary sleeper set of FIG. [Figure 5] FIG. 5 shows the state in which the temporary sleeper set is being installed at the edge of the road. [Figure 6]FIG. 6 is a diagram showing a state in which temporary rails are laid on a temporary sleeper set. [Figure 7] 7 is a cross-sectional view of the AA section of FIG. 6 as seen from the direction of the arrow. [Figure 8] FIG. 8 is a diagram showing a state in which a concrete paving device moves on a pair of temporary rails laid in a tunnel under construction. [Figure 9] 9 is a perspective view showing a modified example of the temporary rail accommodating space of the pair of rail support portions of FIG. [Figure 10] FIG. 10 is a diagram showing a temporary sleeper set according to the second embodiment of the present invention. [Figure 11] FIG. 11 is a diagram showing the state in which the temporary sleeper set of FIG. 10 is installed at the edge of a road. [Figure 12] 12 is a cross-sectional view of the BB cross section of FIG. 11 as seen from the direction of the arrow. [Figure 13] FIG. 13 is a diagram showing a temporary sleeper set according to the third embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0021] Specific embodiments of the present invention will be described below with reference to the drawings. In the following, identical or corresponding elements throughout the drawings will be designated by the same reference numerals, and redundant descriptions will be omitted. Furthermore, since the following drawings are for explaining the present invention, elements unrelated to the present invention may be omitted, dimensions may be inaccurate due to exaggeration or simplification, and the shapes of corresponding elements may not match in multiple drawings. Furthermore, the present invention is not limited to the following embodiments.

[0022] (Embodiment 1)

[0023] [composition] FIG. 1 is a perspective view showing an example of the configuration of a temporary sleeper 100 according to a first embodiment of the present invention. In FIG. 1, reference symbol C1 indicates the center line in the width direction of the bottom part 1 of the temporary sleeper 100, reference symbol C2 indicates the center line of the through hole 3, and reference symbol C3 indicates the center line of the pair of rail support parts 4,4 in a predetermined direction. The center line C2 of the through hole 3 represents the position of the through hole 3. The center line C3 in the predetermined direction of the pair of rail support parts 4,4 represents the position of the pair of rail support parts 4,4 in the predetermined direction. FIG. 2 is a three-view diagram showing the configuration of the temporary sleeper 100 of FIG. 1. In FIG. 2, a front view is shown on the upper left side, a right side view is shown on the upper right side, and a bottom view is shown in the lower part.

[0024] 1 and 2, the temporary sleeper 100 of this embodiment 1 is a member supporting a temporary rail 11 (see FIG. 6) laid along a gutter 43 (see FIG. 6) of a road 40 (see FIG. 6) extending through a tunnel 61 (see FIG. 10) under construction. In connection with this application, a predetermined direction Dp and a rail extension direction Dr are defined for the temporary sleeper 100. The predetermined direction Dp is the extension direction of the bottom part 1 of the temporary sleeper 100. The rail extension direction Dr is a direction parallel to the surface (main surface on the front side) 1d of the bottom part 1 and perpendicular to the predetermined direction Dp.

[0025] The temporary sleeper 100 comprises a bottom portion 1 and a pair of side portions 2,2.

[0026] The bottom 1 is formed in a plate shape extending in the predetermined direction Dp. One end (predetermined end) 1b of the bottom 1 is formed, for example, parallel to the rail extension direction Dr. Note that the one end 1b of the bottom 1 may have any shape. The bottom 1 is provided with a long through-hole 3 extending in the predetermined direction Dp. This through-hole 3 is provided, for example, at a predetermined through-hole position Pp1 in the predetermined direction Dp based on the one end 1b of the bottom 1. The predetermined through-hole position Pp1 of the through-hole 3 is represented by the center line C2 of the through-hole 3. Here, the predetermined through-hole position Pp1 refers to a position vector at a position spaced a first predetermined distance from the one end 1b of the bottom 1 in the predetermined direction Dp, and is represented by a bidirectional arrow for convenience. The predetermined through-hole position Pp1 will be explained in detail later. Here, the bottom 1 is formed in a rectangular shape that is long in the predetermined direction Dp. The elongated holes constituting the through hole 3 are required to have a certain length because they function to adjust the relative position of the pair of rail support portions 4, 4 with respect to the position of the side gutter 43 (see FIG. 7). The length of the through hole 3 is determined, for example, taking into consideration variations in the distance between the boundary 49 between the main portion 41 and the edge portion 42 of the road 40 and the side gutter 43 in a plan view, which may occur between various road specifications (standards). Specifically, the length of the through hole 3 is set to, for example, about half the length of the bottom portion 1. When a bolt 31 is used as the fastener 30 of the engaging member 21 (described later) (see FIG. 3) or when a J-bolt (hereinafter sometimes referred to as an engaging J-bolt 81) is used as the engaging member 81 in the second and third embodiments (see FIG. 10), the width of the through hole 3 is set to a dimension that allows the bolt 31 and the engaging J-bolt 81 to be inserted with a gap. The position of the through hole 3 in the width direction of the bottom portion 1 need not be at a side end portion. In this example, the through hole 3 is provided in the center of the width direction of the bottom portion 1.

[0027] The pair of side portions 2, 2 are erected on both end portions of the bottom portion 1 and are formed in a plate shape. A pair of rail support portions 4, 4 are provided on the tip surfaces of the pair of side portions 2, 2, respectively, in the rail extension direction Dr. The pair of rail support portions 4, 4 are provided at predetermined support portion positions Pp2 based on the position of the through hole 3 in the predetermined direction Dp. The predetermined support portion positions Pp2 of the pair of rail support portions 4, 4 are represented by the center line C3 of the pair of rail support portions 4, 4 in the predetermined direction Dp. In this case, the position of the through hole 3 in the predetermined direction Dp that serves as the reference for the predetermined support portion positions Pp2 is not particularly limited. Here, the pair of rail support portions 4, 4 are provided at the predetermined support portion positions Pp2 in the predetermined direction Dp based on the center line C2 of the through hole 3. In other words, the predetermined through hole position Pp1 of the through hole 3 serves as the reference for the predetermined support portion positions Pp2. Here, the support portion predetermined position Pp2 refers to a position vector at a position spaced a second predetermined distance in the predetermined direction Dp from the center line C2 of the through hole 3, and is represented by a bidirectional arrow for convenience. The support portion predetermined position Pp2 will be described in detail later. Referring to FIG. 2, each of the pair of rail support portions 4, 4 is formed in a temporary rail storage space having a flat bottom surface 4a at a predetermined height T and a predetermined width W from the bottom surface (main back surface) 1a of the bottom portion 1, and inner wall surfaces 4b sandwiching the bottom surface 4a. The specific shape of this temporary rail storage space is not particularly limited. Here, the temporary rail storage space is formed as a rectangular cutout having the bottom surface 4a at a predetermined height T from the bottom surface 1a of the bottom portion 1 and an inner side surface of a predetermined width W. Another example of the specific shape of the temporary rail storage space is shown in a modified example of the first embodiment (see FIG. 9) described later. The predetermined height T of the bottom surface 4a of the cutouts constituting the pair of rail support parts 4, 4 from the bottom surface 1a of the bottom part 1 and the predetermined width W of the inner surface are determined taking into consideration the specifications (standards) for laying the temporary rail 11 (see Figure 7). The dimensions of the cutouts are set so that the lower part of the temporary rail 11 fits in with a gap in the width direction. The height of the parts of the pair of side parts 2, 2 located near the other end (one end) 1c of the bottom part 1 decreases as they approach the other end 1c of the bottom 1.

[0028] Specifically, the pair of side portions 2, 2 here extend from both ends of the bottom portion 1 in a direction perpendicular to the surface (front main surface) 1d of the bottom portion 1. The pair of side portions 2, 2 each have a pair of rail support portions 4, 4 consisting of rectangular cutout portions at the support portion predetermined position Pp2, and are formed in a plate shape having an inclined portion 2a that slopes toward the other end 1c of the bottom portion 1. Providing these inclined portions 2a allows the temporary sleeper 100 to be made lighter.

[0029] Referring to FIG. 2, an example of the dimensions of the temporary sleeper 100 is as follows: The overall length, width, and height of the temporary sleeper 100 are 280 mm, 100 mm, and 50 mm, respectively. The length and width of the through-hole 3 are 135 mm and 14 mm, respectively. The width and depth of the pair of rail support portions 4,4 are 135 mm and 20 mm, respectively. The predetermined through-hole position Pp1 is 107.5 mm from one end 1b of the bottom portion 1, and the predetermined support portion position Pp2 is 25 mm from the center line C2 of the through-hole 3. The length of the inclined portion 2a is 100 mm.

[0030] The material of the temporary sleeper 100 is required to be strong enough to support the temporary rails laid on the pair of rail support parts 4, 4. Examples of such materials include metal and plastic. In this example, the material of the temporary sleeper 100 is steel. If the material is steel, the temporary sleeper 100 will have an appropriate weight, and unnecessary temporary sleepers 100 can be melted down and recycled. The temporary sleeper 100 is produced, for example, by cutting a steel material with a U-shaped cross section into the above-mentioned shape.

[0031] Fig. 3 is a diagram showing a temporary sleeper set 200 according to the first embodiment of the present invention. Fig. 3 is a diagram showing the temporary sleeper set 200 as seen from the back side of the temporary sleeper 100. Fig. 4 is an exploded view showing the configuration of the temporary sleeper set in Fig. 3.

[0032] 3, the temporary sleeper set 200 includes a temporary sleeper 100, an engaging member 21 that engages with the gutter 43, and a fixing device 30 that fixes the engaging member 21 around the through-hole 3 in the bottom 1 of the temporary sleeper 100. As will be described later, the temporary sleeper 100 is used with the engaging member 21 attached.

[0033] Referring to FIG. 4, the shape of the engaging member 21 is not particularly limited. Here, the engaging member 21 is configured as a rectangular parallelepiped block. Hereinafter, the engaging member 21 may be referred to as an engaging block 21. Furthermore, embodiments 2 and 3 described below show an embodiment in which the engaging member 21 is configured with an engaging J-bolt 81. The engaging block 21 has a bolt insertion hole 21a that penetrates in the height (thickness) direction. The material of the engaging block 21 is not particularly limited. Examples of materials for the engaging block 21 include wood, metal, and plastic. Here, the engaging block 21 is configured of wood. The width of the engaging block 21 is determined according to the width of the opening 45b of the side gutter 43 (see FIG. 7). In the first embodiment, the width of the opening 45b of the side gutter 43 is, for example, 60 mm, and the width of the engaging block 21 is, for example, 50 mm.

[0034] The fixing device 30 is configured by, for example, a bolt fastener. The bolt fastener includes, for example, a bolt 31, a nut 32, washers 33 and 35, and a spacer 34 having a bolt insertion hole 34a. A method of attaching the engagement block 21 to the temporary sleeper 100 will be described later.

[0035] {Predetermined through-hole position Pp1 and predetermined support portion position Pp2} Fig. 5 is a diagram showing the state in which the temporary sleeper set 200 is installed on the edge 42 of the road 40. Fig. 6 is a diagram showing the state in which the temporary rail 11 is laid on the temporary sleeper set 200. Fig. 7 is a cross-sectional view of the AA section of Fig. 6 as seen from the direction of the arrow.

[0036] Referring to FIG. 5, the road 40 is generally constructed inside the tunnel 61 (see FIG. 8). However, the road 40 may be constructed inside the tunnel 61 as well as extending outside the tunnel 61. The present invention applies to a road 40 that extends through a tunnel 61 under construction and does not have curbs installed. The road 40 is paved with concrete and includes a main section 41 extending from the center to both sides and edge sections 42, 42 at both ends. A side road (inspection road) space 44 exists outside the edge sections 42, 42. Inside the tunnel 61, this side road space 44 exists between the edge sections 42, 42 of the road 40 and the inner surface of the tunnel 61. In the completed road 40, curbs are installed along the outer edges of the edge sections 42, 42, and the side road is formed at the same height as the curbs. A joint made of asphalt or the like may be formed at the boundary 49 between the main section 41 and the edge sections 42, 42. A pair of side gutters 43, 43 are provided at the ends of the edge portions 42, 42 on both sides. For convenience, the following will describe one side of the road. The other side of the road 40 is similar to the one side, so a description thereof will be omitted.

[0037] The surface of the road 40 slopes slightly from the center toward the gutter 43. In addition, so-called broom holes 47 are formed on the surface of the main portion 41 of the road 40 to prevent automobile tires from slipping. The ends of these broom holes are located at the boundary 49 between the main portion 41 and the edge portion 42 of the road 40.

[0038] <Through hole predetermined position Pp1> The predetermined through-hole position Pp1 may basically be any position of the through-hole 3 that has been appropriately determined in advance. Specifically, for example, the temporary sleeper 100 is basically aligned with one end 1b of the bottom portion 1 at the boundary 49 between the main portion 41 and the edge portion 42 of the road 40, with a space of about 20 mm. This space is provided so that the temporary sleeper 100 does not get in the way when forming the broom grooves in the main portion 41 of the road. The predetermined through-hole position Pp1 is set to the distance between the boundary 49 between the main portion 41 and the edge portion 42 of the road 40 and the center position of the gutter 43 in a plan view, minus the 20 mm space. However, the distance between the boundary 49 between the main portion 41 and the edge portion 42 of the road 40 and the center position of the gutter 43 in a plan view is determined by the specifications of the road 40, which vary widely. For this reason, the through-hole 3 in the bottom 1 of the temporary sleeper 100 is formed in an elongated hole shape so as to be able to accommodate various distances between the boundary 49 between the main portion 41 and edge portion 42 of the road 40 and the center position of the side ditch 43. Therefore, even if the distance between the boundary 49 between the main portion 41 and edge portion 42 of the road 40 and the center position of the side ditch 43 changes depending on the specifications of various roads 40, the attachment position of the engaging member (here, engaging block) 21 can be adjusted to suit the specifications of each road 40, so that the engaging member 21 can be set to a position where it properly engages with the side ditch 43. In this case, the relative position of the pair of rail support parts 4, 4 with respect to the position of the side ditch 43 (see FIG. 7) changes.

[0039] <Support part predetermined position Pp2> The predetermined support position Pp2 may be any position that has been appropriately determined in advance for the pair of rail support parts 4, 4. Specifically, the predetermined support position Pp2 is set at a standard distance between the position of the gutter 43 and the temporary rail 11 laid on the pair of rail support parts 4, 4 of the temporary sleeper 100 in a plan view.

[0040] 7, it is desirable that the temporary rail 11 be laid near the opening 45b of the gutter 43 in plan view. Hereinafter, the "position near the opening 45b of the gutter 43 in plan view" of the temporary rail 11 may be referred to as the "basic position." The reason this basic position is desirable is as follows.

[0041] The gutter 43 is composed of, for example, a concrete waterway 45 buried in the side edge of the edge 42 of the road 40. This waterway 45 has a flow path 45a in the center through which inflowing water flows down, and an opening 45b communicating with the aboveground space is formed above the flow path 45a. The opening 45b has two widths, for example, 60 mm and 15 mm. In the first embodiment, the width of the opening 45b is 60 mm. U-shaped reinforcing bars 48 are arranged around the flow path 45a. It is desirable that the pressing force from the temporary rail 11 be received by the part of the gutter 43 (waterway 45) where the reinforcing bars 48 are arranged, i.e., approximately the part above the U-shaped reinforcing bars 48. Therefore, it is desirable that the temporary rail 11 be laid near the opening 45b of the gutter 43 (basic position) in a plan view, if possible. However, this basic position is merely the most desirable position for receiving the pressing force from the temporary rail 11, and there is no significant problem if the pressing force from the temporary rail 11 is received at a position other than this.

[0042] The distance between the gutter 43 and the temporary rail 11 is determined by the installation specifications of the temporary rail 11, and there are various types of installation specifications for the temporary rail 11. However, even if the distance between the gutter 43 and the temporary rail 11 changes depending on the installation specifications of the various types of temporary rail 11, the positions of the pair of rail support parts 4, 4 of the temporary sleeper 100 can be set to the basic position by adjusting the attachment position of the engaging block 21 to suit the installation specifications of each temporary rail 11. In this case, however, the position of the temporary sleeper 100 changes in the width direction of the road 40 (predetermined direction Dp).

[0043] On the other hand, as described above, if the position of the temporary sleeper 100 is prevented from changing, the relative position of the pair of rail support parts 4, 4 with respect to the position of the side gutter 43, i.e., the position at which the pressing force from the temporary rail 11 is received, changes. Whether to prioritize the position of the temporary sleeper 100 or the relative position of the pair of rail support parts 4, 4 with respect to the position of the side gutter 43 is to be selected appropriately on a case-by-case basis. There is no major problem with either selection. Therefore, the boundary 49 between the main part 41 and edge part 42 of the road 40 is merely a guide when installing the temporary sleeper 100.

[0044] Referring to Figure 7, in this embodiment 1, the position of the temporary sleeper 100 is given priority, and the relative position of a pair of rail support parts 4, 4 with respect to the position of the gutter 43 is adjusted from the support part predetermined position Pp2, but the distance between the gutter 43 and the temporary rail 11 after adjustment complies with the installation specifications of the temporary rail 11, and the pressing force from the temporary rail 11 can be received at the basic position.

[0045] Thus, the through-hole predetermined position Pp1 and the support portion predetermined position Pp2 are important matters for the present invention, and the elongated through-hole 3 is an important component that characterizes the present invention.

[0046] [How to use] The following describes how to use the temporary sleeper 100. As in the above, it is assumed below that the predetermined through-hole position Pp1 of the through-hole 3 does not conform to the specifications of the road 40, and that the predetermined support portion positions Pp2 of the pair of rail support portions 4, 4 conform to the installation specifications of the temporary rail 11.

[0047] {Assembly of 200 temporary sleeper sets} 3 and 4, first, the temporary sleeper set 200 is assembled. Specifically, the engaging member 21 is attached to the temporary sleeper 100 in the following procedure. First, the surface of the engaging member 21 on which the bolt insertion hole 21a is formed is abutted against the bottom surface 1a of the bottom part 1 of the temporary sleeper 100 so that the bolt insertion hole 21a is aligned with the through-hole 3, and the bolt 31 fitted with the washer 35 is inserted into the bolt insertion hole 21a of the engaging member 21 from the front side of the bottom part 1 of the temporary sleeper 100. Next, the spacer 34, washer 33, and nut 32 are fitted in this order onto the part of the bolt 31 that has passed through the engaging member 21. Next, the nut 32 is tightened using a fastener. In this manner, the engaging member 21 is attached to the temporary sleeper 100. In this case, as described above, the position of the engaging member 21 in the predetermined direction Dp is adjusted so that the pair of rail support parts 4, 4 are located in the basic position (a position where the temporary rail 11 is located near the opening 45b of the side gutter 43 in a plan view) with respect to the side gutter 43. In addition, the engaging member 21 is attached to the bottom 1 of the temporary sleeper 100 so that its longitudinal direction faces the rail extension direction Dr.

[0048] {installation} Referring to Figure 5, the temporary sleeper set 200 is placed on the edge 42 of the road 40 so that the engaging member 21 is inserted into the opening 45b (see Figure 7) of the side gutter 43. In this case, the extension direction (predetermined direction Dp) of the bottom parts 1 of the multiple temporary sleepers 100 coincides with the width direction of the road 40, and one end 1b of the bottom parts 1 is aligned with the boundary 49 between the main part 41 and the edge part 42 of the road 40 with a space of about 20 mm. The pair of rail support parts 4, 4 of the temporary sleeper 100 is located in the basic position, and the rail extension direction Dr of the pair of rail support parts 4, 4 coincides with the extension direction of the road 40. The temporary sleeper sets 200 are installed at predetermined intervals in the extension direction of the road 40.

[0049] {Laying of temporary rail 11} Referring to Figure 6, a temporary rail 11 is laid on a pair of rail support portions 4, 4 of temporary sleepers 100 of a plurality of temporary sleeper sets 200 installed at predetermined intervals in the direction of extension of a road 40. In this way, one temporary rail 11 is laid on one edge 42 of the road 40. Furthermore, by a process similar to the above process, the other temporary rail 11 is laid on the other edge 42 of the road 40 (see Figure 8).

[0050] {Concrete pavement} Fig. 8 is a schematic diagram showing a state in which a concrete paving device 71 moves on a pair of temporary rails 11 laid in a tunnel 61 under construction. In Fig. 8, the concrete paving device 71 is shown in a schematic manner. Also, the shape of the gutter 43 (waterway 45) is slightly deformed.

[0051] Referring to Figure 8, inside a tunnel 61 under construction, a concrete paving device 71 runs on a pair of temporary rails 11 laid on the edges 42 on both sides of the road, rotating its wheels 72, paving the main section 41 of the road 40 with concrete.

[0052] [Action and effect] 7 and 8, when the concrete paving device 71 travels on the pair of temporary rails 11, a force is applied to the temporary sleeper 100 due to the structure of the wheels 72, pushing one of the temporary rails 11, and ultimately the pair of rail support parts 4, 4, toward the side of the road 40. However, the engaging members 21 of the temporary sleeper 100 engage with the openings 45b of the side gutters 43, generating a reaction force against this pushing force toward the side of the road 40. This allows the temporary sleeper 100 to maintain a constant gauge of the pair of temporary rails 11, 11.

[0053] [Variations] FIG. 9 is a perspective view showing a modified example of the temporary rail storage space of the pair of rail support portions 4, 4 in FIG. 1. In FIG. 9, only reference numerals necessary for explanation are shown. Referring to FIG. 9, the upper end surfaces of the pair of side portions 2, 2 of the temporary sleeper 100 are formed as flat surfaces (surfaces parallel to the bottom portion 1) having a predetermined height T from the bottom surface 1a of the bottom portion 1 (see FIG. 1). A pair of pillar-shaped members (here, rectangular pillar-shaped members) 7, 8 are installed between the pair of side portions 2, 2, extending in the rail extension direction Dr and spaced a predetermined distance from each other (a distance corresponding to the predetermined width W) in the predetermined direction Dp. The material of the pair of pillar-shaped members 7, 8 is not particularly limited. Here, the material of the pair of pillar-shaped members 7, 8 is steel. The pair of pillar-shaped members 7, 8 are fixed to the pair of side portions 2, 2 by, for example, welding. This forms a temporary rail storage space having a flat bottom surface 4a at a predetermined height T and a predetermined width W from the bottom surface 1a of the bottom portion 1, and inner wall surfaces 7a, 8a sandwiching the bottom surface 4a. In this temporary rail storage space, the bottom surface 4a is formed by the upper end surfaces of a pair of side portions 2, 2, and the inner wall surfaces 7a, 8a sandwiching the bottom surface 4a are formed by the opposing side surfaces of a pair of columnar members 7, 8. This temporary rail storage space constitutes a pair of rail support portions 4, 4. Note that instead of the pair of columnar members 7, 8, a pair of protrusions may be provided on each of the pair of side portions 2, 2. This modification of the embodiment can also construct (realize) a temporary rail storage space comprising a pair of rail support portions 4, 4. Note that in this modification, the installation specifications (standards) of the temporary rail 11 differ from those of the temporary rail 11 in the embodiment of FIG. 1.

[0054] (Embodiment 2) The second embodiment of the present invention illustrates an example in which a temporary sleeper 100 is installed in a side ditch 43 having a narrow opening 45b (see FIGS. 11 and 12). The second embodiment is similar to the first embodiment in configuration and effects, except that the temporary sleeper 100 is installed in a side ditch 43 having a narrow opening 45b. Differences from the first embodiment will be described below.

[0055] Fig. 10 is a diagram showing a temporary sleeper set 300 according to a second embodiment of the present invention. Fig. 11 is a diagram showing the state in which the temporary sleeper set 300 of Fig. 10 is installed on the edge of a road. Fig. 12 is a cross-sectional view of the BB cross section of Fig. 11 as seen from the direction of the arrow.

[0056] Referring to FIG. 10, a temporary sleeper set 300 of the second embodiment includes the temporary sleeper 100 of the first embodiment, an engaging member 81, and a fixing device 80.

[0057] The engaging member 81 is configured by a J-bolt (engaging J-bolt). The fastener 80 includes a nut 82 and a washer 83. The diameter of the engaging J-bolt 81 is, for example, 13 mm.

[0058] Referring to FIG. 11, in the second embodiment, the width of the opening 45b of the gutter 43 is, for example, 15 mm.

[0059] 10, the temporary sleeper set 300 is assembled in the following procedure. First, the engaging J-bolt 81 is inserted into the through-hole 3 of the temporary sleeper 100. At this time, the engaging J-bolt 81 is oriented so that the width direction of its J-shape coincides with the width direction of the temporary sleeper 100 (the rail extension direction Dr (see FIG. 1)). In addition, the position of the engaging J-bolt 81 on the through-hole 3 is adjusted so that when the temporary sleeper 100 is placed on the edge 42 of the road 40, one end 1b of the bottom 1 of the temporary sleeper 100 has an appropriate space (not necessarily about 20 mm) from the boundary 49 between the main part 41 and the edge 42 of the road 40.

[0060] Next, a washer 83 and a nut 82 are fitted in this order onto the base end of the engaging J-bolt 81. After that, the nut 82 is tightened to the bottom 1 of the temporary sleeper 100 using a fastener. As a result, the tip of the engaging J-bolt 81 comes into strong contact with the bottom surface of the bottom 1 of the temporary sleeper 100, and the engaging J-bolt 81 is firmly integrated with the temporary sleeper 100.

[0061] 11 and 12, the temporary sleeper set 300 is then placed on the edge 42 of the road 40 with the engaging J-bolts 81 inserted into the openings 45b of the gutter 43. In this case, the extension direction (predetermined direction Dp) of the bottoms 1 of the multiple temporary sleepers 100 coincides with the width direction of the road 40, and one end 1b of the bottoms 1 is aligned with the boundary 49 between the main part 41 and the edge 42 of the road 40 with an appropriate space between them.

[0062] 12, according to the second embodiment, when a force is applied to the temporary sleeper 100 from the wheels 72 (see FIG. 8) to push the pair of rail support parts 4, 4 toward both sides of the road 40, the temporary sleeper 100, with the engaging J-bolt 81 engaged with the side gutter 43, generates a reaction force against the force pushing toward the side of the road 40. This allows the temporary sleeper 100 to maintain a constant gauge of the pair of temporary rails 11, 11.

[0063] (Embodiment 3) Embodiment 3 of the present invention illustrates an embodiment in which a temporary sleeper set 400 using J bolts is installed in a gutter 43 having a wide opening 45b (see FIG. 5). The configuration and effects of this embodiment 3 are the same as those of embodiment 1, except that the temporary sleeper set 400 using J bolts is installed. Differences from embodiment 1 will be described below.

[0064] Fig. 13 is a diagram showing a temporary sleeper set 400 according to embodiment 3 of the present invention. Referring to Fig. 13, the temporary sleeper set 400 of embodiment 3 includes the temporary sleeper 100 of embodiment 1, an engaging member 81, and a fixing device 80.

[0065] Engagement member 81 is composed of a J-bolt (engagement bolt). Fixture 80 includes a nut 82, a washer 83, and a dedicated washer 84. Dedicated washer 84 is composed of, for example, a rectangular plate-shaped spacer, and is provided with a through-hole (not shown) at an appropriate location through which the straight portion of the J-bolt is inserted.

[0066] Referring to FIG. 13, in the third embodiment, the width dimension of the opening 45b of the gutter 43 is 60 mm, similar to the first embodiment.

[0067] 13, the temporary sleeper set 400 is assembled in the following procedure. First, the engaging J-bolt 81 is inserted through the through-hole of the dedicated washer 84 and the through-hole 3 of the temporary sleeper 100, in that order. At this time, the engaging J-bolt 81 is oriented so that the width direction of its J-shape coincides with the longitudinal direction of the through-hole 3 (the predetermined direction Dp of the temporary sleeper 100 (see FIG. 1)) and its tip surface faces the dedicated washer 84. Here, the dimension of the width direction of the J-shape of the engaging J-bolt is 50 mm, for example. Furthermore, the position of the engaging J-bolt 81 on the through-hole 3 is adjusted so that when the temporary sleeper 100 is placed on the edge 42 of the road 40, one end 1b of the bottom part 1 of the temporary sleeper 100 has an appropriate space (not necessarily about 20 mm) from the boundary 49 between the main part 41 and the edge 42 of the road 40.

[0068] Next, a washer 83 and a nut 82 are fitted, in that order, onto the base end of the engaging J-bolt 81. After that, the nut 82 is tightened to the bottom 1 of the temporary sleeper 100 using a fastener. As a result, the tip of the engaging J-bolt 81 is pressed firmly against the bottom surface of the bottom 1 of the temporary sleeper 100 via the dedicated washer 84, and the engaging J-bolt 81 is firmly integrated with the temporary sleeper 100.

[0069] 13, the temporary sleeper set 400 is then placed on the edge 42 of the road 40 with the engaging J-bolts 81 inserted into the openings 45b of the gutter 43. In this case, the extension direction (predetermined direction Dp) of the bottoms 1 of the multiple temporary sleepers 100 coincides with the width direction of the road 40, and one end 1b of the bottoms 1 is aligned with the boundary 49 between the main part 41 and the edge 42 of the road 40 with an appropriate space between them.

[0070] 13, according to the third embodiment, when a force is applied to the temporary sleeper 100 from the wheels 72 (see FIG. 8) to push the pair of rail support parts 4, 4 toward both sides of the road 40, the temporary sleeper 100, with the engaging J-bolt 81 engaged with the side gutter 43, generates a reaction force against the force pushing toward the side of the road 40. This allows the temporary sleeper 100 to keep the gauge of the pair of temporary rails 11, 11 constant.

[0071] Furthermore, according to embodiments 2 and 3, by using a J-bolt as the engaging member 81, the temporary sleeper set 300, 400 can be applied to gutters 43 with different width dimensions of the opening 45b simply by changing the posture of the J-bolt (engaging J-bolt 81).

[0072] (Other embodiments) In any of the first to third embodiments, a plate-shaped elastic member (not shown) such as a mat may be placed between the temporary sleeper 100 and the ground. This plate-shaped elastic member has holes for inserting the engaging blocks 21, engaging J-bolts 81, or engaging J-bolts 81 and dedicated washers 84, for example, and is placed between the temporary sleeper 100 and the ground when the temporary sleeper set 200 or the temporary sleeper sets 300, 400 is installed. Alternatively, this plate-shaped elastic member has holes corresponding to the through-holes 3 in the bottom part 1 of the temporary sleeper 100, and is placed between the engaging members 21 and the bottom part 1 of the temporary sleeper 100 when the temporary sleeper set 200 is assembled. With this configuration, the temporary sleeper 100 is less likely to slip due to friction between the plate-shaped elastic member and the ground.

[0073] In any of the first to third embodiments, the center line C3 of the pair of rail support parts 4, 4 may be located closer to the other end 1c of the bottom 1 in the predetermined direction Dp than the center line C2 of the through hole 3. This configuration can accommodate a configuration in which the temporary rails 11, 11 are laid outside the gutter 43.

[0074] Many modifications and alternative embodiments will be apparent to those skilled in the art in light of the above description, and therefore the above description should be construed as illustrative only. [Industrial Applicability]

[0075] The temporary sleeper and temporary sleeper set of the present invention are useful as temporary sleepers and temporary sleeper sets that can maintain a constant gauge between a pair of temporary rails. [Explanation of symbols]

[0076] 1 bottom 1a Bottom 1b one end 1c other end 1d Surface (front main surface) 2 Side 3 Through holes 4 Rail support 4a Bottom 4b Inner wall surface 7,8 Column members 7a,8a Inner wall surface 11 Temporary Rail 21 Engagement member (engagement block) 30,80 Fixtures 31 volts 32,82 Nut 33,35,83 Washer 34 Spacer 40 road 41 Main Section 42 Edge 43 Gutter 44 Side road space 45 Waterways 47 Broom Eyes 48 Reinforced concrete 49 Boundary 61 Tunnel 71 Concrete paving equipment 72 wheels 81 Engagement member (engagement J bolt) 100 Temporary sleepers 200, 300, 400 Temporary sleeper set Dp Prescribed direction Dr Rail extension direction Pp1 Through hole specified position Pp2 Support part specified position

Claims

1. A temporary sleeper supporting a temporary rail laid along a ditch of a road extending through a tunnel under construction, a plate-shaped bottom portion extending in a predetermined direction; a pair of plate-shaped side portions erected at both ends of the bottom portion, a through-hole having a long hole shape extending in the predetermined direction is provided in the bottom portion, A pair of rail support portions are provided on the tip surfaces of the pair of side portions, respectively, for positioning and supporting the temporary rail in a rail extension direction that is parallel to the main surface of the bottom portion and perpendicular to the predetermined direction, and The pair of rail support portions are each formed in a temporary rail storage space having a flat bottom surface at a predetermined height and width from the bottom surface of the bottom portion and inner wall surfaces sandwiching the bottom surface.

2. The temporary sleeper according to claim 1 , wherein the pair of rail support portions are each provided at a predetermined support portion position based on the position of the through hole in the predetermined direction.

3. 2. The temporary sleeper according to claim 1, wherein the temporary rail storage space is formed in a cutout portion having a bottom surface at the predetermined height from the bottom surface of the bottom portion and an inner surface of the predetermined width as the inner wall surface.

4. 2. The temporary sleeper according to claim 1, wherein the heights of the portions of the pair of side sections located near one end of the bottom section are formed to decrease as they approach the one end of the bottom section.

5. The temporary sleeper according to claim 1; an engaging member that engages with the side gutter; A temporary sleeper set comprising: a fastener for fixing the engaging member around the through hole in the bottom of the temporary sleeper.

Images