Temporary road for railway construction and method of constructing temporary road for railway construction

Abstract

To provide a temporary road for railway construction which is easy to construct and remove, can avoid structures existing on a platform, has high reliability, and is excellent in economy.SOLUTION: A temporary road for railway construction having a slope way A is constructed by a block assembly 20 composed of a plurality of thermoplastic-resin-foam-made blocks, and the block assembly is provided with a substrate block layer 20X and a road surface block layer 20Y, and the upper surface of the road surface block layer in the inclined road is formed in a trapezoidal shape in a top view.SELECTED DRAWING: Figure 9

Description

Technical Field

[0001] The present invention relates to a temporary road for railway construction made of a thermoplastic resin foam, which is easy to construct and remove, has high reliability, and is excellent in economy, and a method for constructing the same.

Background Art

[0002] Repairs and improvements of platforms or railways are usually carried out in a short time from the last train to the first train. At that time, in order to drive construction heavy machinery onto the platform or the like, a temporary road is constructed on the railway track.

[0003] This temporary road for railway construction is generally constructed by stacking old sleepers. However, since sleepers are heavy and have a small volume (size), it is necessary to stack a large number of them. The construction and removal work has been time-consuming and labor-intensive work. In addition, there is also a case where a scaffold is assembled with a single pipe and materials are transported thereon. In this case, it takes time for assembly, and there is also a risk of short circuit between tracks (between rails) because iron single pipes are used. In addition, there was also a case where, without constructing a temporary road, a working heavy machine (jumbo, pile driver, etc.) and materials were lifted by a large crane and carried onto the platform. In this case, there were problems such as contact of the crane arm with the overhead line and high cost due to the use of the crane.

[0004] Therefore, the applicants of the present application previously created a temporary road for railway construction composed of a structure constructed by combining a leg block made of a thermoplastic resin foam formed in a shape having a concave groove straddling a railway track at the bottom, a rectangular block made of a thermoplastic resin foam, and / or an inclined block made of a thermoplastic resin foam having a trapezoidal or triangular longitudinal cross-sectional shape with a gradient surface on the upper surface, and filed a patent application (Patent Document 1). According to the temporary road for railway construction disclosed in this Patent Document 1, since it is constructed by combining leg blocks, square blocks, etc. made of thermoplastic resin foam, its construction and removal work are easy, and it is possible to provide a highly reliable temporary road for railway construction that can also be self-propelled by heavy machinery.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Disclosure of the Invention

Problems to be Solved by the Invention

[0006] Here, when constructing a temporary road that connects between platforms by combining leg blocks, square blocks, etc. made of thermoplastic resin foam as disclosed in the above Patent Document 1, generally, as shown in FIG. 9 of the same Patent Document 1, in order to shorten the total extended distance of the temporary road to be constructed, the blocks made of thermoplastic resin foam are arranged in a direction perpendicular to the platform, that is, in the direction of the shortest straight-line distance between the platforms, and a temporary road with the shortest distance is constructed.

[0007] However, depending on the construction site of the temporary road, due to reasons such as structures such as stairs, elevators, waiting rooms, and platform fences existing on the platform interfering with the running of heavy machinery, it may be necessary to construct a temporary road that spans obliquely between the platforms. In such a case, for example, it is conceivable to construct a temporary road by arranging square blocks with a rectangular shape in a plan view in a stepped manner by shifting them horizontally when viewed from above. However, in that case, there are problems in terms of economy, etc., such as an increase in the amount of blocks when constructing the temporary road.

[0008] The present invention has been made in view of the problems of the above-described background art, and an object thereof is to provide a temporary road for railway construction that can avoid structures existing on a platform, is easy to construct and remove, has high reliability, and is excellent in economy, and a method for constructing the same.

Means for Solving the Problems

[0009] In order to achieve the above object, the present invention provides a temporary road for railway construction and a method for constructing a temporary road for railway construction as described in the following [1] to

[12] . 〔1〕A temporary road for railway construction constructed between platforms, The temporary road for railway construction has an inclined road constructed obliquely with respect to the shortest straight-line distance direction between the platforms, and The temporary road for railway construction is constructed by a block aggregate composed of a plurality of blocks made of a thermoplastic resin foam, The block aggregate includes a base block layer that forms a substantially flat upper surface at a position higher than the upper surface of the railway rail, and a road surface block layer that is laminated on the base block layer and forms an upper surface having substantially the same height as the height position of the platform, The upper surface of the road surface block layer in the inclined road is formed in a trapezoidal shape in plan view, and is characterized in that, Temporary road for railway construction. 〔2〕One end or both ends of the road surface block layer in the inclined road are constructed by inclined end portions having a triangular or trapezoidal shape in plan view, which are formed by blocks made of a thermoplastic resin foam including inclined blocks having a triangular or trapezoidal shape in plan view, and is characterized in that, the temporary road for railway construction according to the above [1]. 〔3〕The road surface block layer in the inclined road is constructed by the inclined end portion and a plurality of square blocks having a square shape in plan view, The square blocks are arranged adjacent to the inclined end portion, and the end sides of the square blocks are arranged along the extending direction of the inclined road, and is characterized in that, the temporary road for railway construction according to the above [2]. 〔4〕The subgrade block layer on the inclined road is constructed by arranging a plurality of square blocks with a rectangular shape in plan view in a stepped manner in plan view, and is characterized in that it is a temporary road for railway construction according to any one of the above 〔1〕 to 〔3〕. 〔5〕The upper surface of the road surface block layer on the inclined road is formed in a parallelogram shape in plan view, and is characterized in that it is a temporary road for railway construction according to any one of the above 〔1〕 to 〔4〕. 〔6〕The upper surface of the subgrade block layer on the inclined road is formed wider than the upper surface of the road surface block layer on the inclined road, and is characterized in that it is a temporary road for railway construction according to any one of the above 〔1〕 to 〔5〕. 〔7〕The angle formed between the shortest straight-line distance direction between the platforms and the extending direction of the inclined road is formed to be 5 degrees or more and 60 degrees or less, and is characterized in that it is a temporary road for railway construction according to any one of the above 〔1〕 to 〔6〕. 〔8〕The subgrade block layer includes a concave groove block having a concave groove at the bottom of the block, and is characterized in that the concave groove block is arranged across the railway rail by the concave groove, and is a temporary road for railway construction according to any one of the above 〔1〕 to 〔7〕. 〔9〕A protective plate is placed on the upper surface of the road surface block layer, and is characterized in that it is a temporary road for railway construction according to any one of the above 〔1〕 to 〔8〕. 〔10〕A method for constructing a temporary road for railway construction, in which a temporary road having an inclined road constructed obliquely with respect to the shortest straight-line distance direction between platforms is constructed between platforms by a block assembly composed of a plurality of thermoplastic resin foam blocks, The block assembly is composed of a subgrade block layer forming a substantially flat upper surface at a position higher than the upper surface of the railway rail, and a road surface block layer laminated on the subgrade block layer and forming an upper surface at substantially the same height as the height position of the platform, The upper surface of the road surface block layer on the inclined road is constructed in a trapezoidal shape in plan view, and is characterized in that it is A method for constructing a temporary road for railway construction. 〔11〕On one or both ends of the road surface block layer on the above inclined road, a block made of a thermoplastic resin foam containing inclined blocks in a triangular or trapezoidal shape in top view is arranged to construct an inclined end in a triangular or trapezoidal shape in top view. The method for constructing a temporary road for railway construction according to the above 〔10〕, characterized in that. 〔12〕A plurality of square blocks in a rectangular shape in top view are arranged adjacent to the above inclined end, and the end sides of the square blocks are arranged along the extending direction of the inclined road to construct a road surface block layer on the inclined road. The method for constructing a temporary road for railway construction according to the above 〔11〕, characterized in that.

Advantages of the Invention

[0010] According to the above-described temporary road for railway construction and its construction method according to the present invention, structures existing on the platform can be avoided, the construction and removal operations are easy, and a highly reliable temporary road for railway construction that can also be self-propelled by heavy machinery can be provided. In addition, a temporary road for railway construction with excellent economic efficiency can be realized, in which there are few parts that cannot be used as a road, and the amount of materials required for constructing the temporary road and the amount of work required for construction can be reduced.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Embodiments for Carrying Out the Invention

[0012] Hereinafter, embodiments of the temporary road for railway construction and its construction method according to the present invention will be described in detail with reference to the drawings.

[0013] FIG. 1 is a perspective view showing an example of a construction site of a temporary road for railway construction. At this construction site, two railway rails 2a and 2b are laid between the platforms 1a and 1b on the back side and the front side. Further, a staircase 3 is installed on the platform 1a on the back side, and a platform fence 4 and the like are provided on the platform 1b on the front side.

[0014] In recent years, at platforms, there has been an increase in barrier-free conversion, installation work of escalators and elevators, and further installation work of platform fences. Such work is carried out in a short time from the last train to the first train so as not to interfere with the passage of trains. At that time, it is advantageous from the viewpoint of work efficiency to allow construction heavy machinery to freely enter the platform.

[0015] Therefore, even at the site shown in FIG. 1, in order to drive heavy machinery onto platforms 1a and 1b, a temporary road is constructed on railway tracks 2a and 2b to connect the space between platforms 1a and 1b. In this case, at the site shown in FIG. 1, structures such as stairs 3 and platform fences 4 formed on platforms 1a and 1b become obstacles. Therefore, in order to avoid the structures existing on the platforms, a temporary road 10 is constructed that obliquely spans the space between platforms 1a and 1b, as shown in FIG. 2.

[0016] The present invention relates to a temporary road 10 having an inclined road A constructed obliquely with respect to the shortest straight-line distance direction between platforms as described above, and a method for constructing the same. The temporary road 10 targeted by the present invention is not limited to a temporary road 10 consisting only of an inclined road A that obliquely connects between platforms, as conceptually shown in FIG. 2, that is, FIG. 3(a). It also includes structures such as those shown in FIG. 3(b), where two or more inclined roads A and A with changing inclination angles in the middle are connected, or those shown in FIGS. 3(c) and (d), which consist of a combination of an inclined road A and a so-called straight road B (a road constructed in the same direction as the shortest straight-line distance direction between platforms).

[0017] Here, from the perspective of making it easier to avoid the structures existing on the platforms, it is preferable that the extended length of the inclined road A is 50% or more, and more preferably 60% or more, when the extended length of the temporary road 10 is set to 100%. The extended length of the temporary road 10 means the length of a line (center line) drawn so as to pass through the midpoint of the road width of the temporary road in the extending direction of the platform from one platform toward the other platform in a top view of the temporary road. Also, when there are multiple inclined roads A in the temporary road, the sum of their extended lengths is taken as the extended length of the inclined road A. From the viewpoint of being able to easily form a highly safe road surface with good economy, it is preferable that the temporary road has a simple shape, that is, a temporary road (Fig. 3(a)) having a single inclined road A formed linearly. Further, from the viewpoint of achieving both good drivability and economy, the angle (θ) (see Fig. 3) formed between the extending direction of the inclined road A and the shortest straight-line distance direction between the platforms is preferably 5 degrees or more and 60 degrees or less, more preferably 7 degrees or more and 50 degrees or less, and particularly preferably 10 degrees or more and 45 degrees or less. Hereinafter, this angle (θ) will also be referred to as the inclination angle (θ). In addition, the extending direction of the inclined road A means the direction in which the inclined road A extends from one platform toward the other platform. When there are a plurality of inclined roads A, there is an extending direction for each inclined road A (see Fig. 3(b)).

[0018] The temporary road 10 having the inclined road A according to the present invention is constructed by a block aggregate 20 composed of a plurality of thermoplastic resin foam blocks. The block aggregate 20 includes a base block layer 20X (see Figs. 4 and 5) that forms a substantially flat upper surface α at a position higher than the upper surfaces of the railway rails 2a and 2b, and a road surface block layer 20Y (see Figs. 8 and 9) that is laminated on the base block layer 20X and forms an upper surface β at substantially the same height as the height position of the platform.

[0019] As shown in FIGS. 4 and 5, the base block layer 20X on the inclined road A can be constructed, for example, using a square block 30 having a substantially square shape in top view, and a groove block 30A in which a concave groove 31 straddling the railway rails 2a and 2b is formed parallel to the long side at the bottom of the square block, a notch block 30B in which a notch 32 for avoiding a trough 5 for protecting cables or the like is formed at an appropriate position, and the like. At this time, it is preferable to construct the base block layer 20X by arranging a plurality of square blocks 30 such that a set of opposite sides of the square block 30 in top view are along the extending direction of the platform and are arranged in a stepped manner in top view. Specifically, as shown in FIG. 5, the square blocks 30 such as the groove block 30A and the notch block 30B are arranged adjacent to each other such that the long sides of the square blocks 30 are parallel to the wall surfaces of the platforms 1a and 1b and the short sides are shifted in a stepped manner in top view, whereby the base block layer 20X serving as the base of the inclined road A can be constructed. In the case of a temporary road having a straight road B, the base block layer 20X in that portion may be arranged in the direction of the shortest straight-line distance between the platforms such that the short sides of the square blocks are arranged in a straight line without being shifted stepwise in top view for the square blocks 30 such as the groove block 30A and the notch block 30B. In the case of a temporary road having inclined roads A with different inclination angles (θ), the stepped shift amount of the square blocks 30 in top view may be changed for arrangement. When arranging each square block 30 on the railway rail, it is preferable to perform unevenness and shape adjustment while arranging by appropriately cutting each square block using a nichrome wire cutting machine or the like as necessary. Note that the square shape means a quadrilateral shape in which the four angles are approximately 90 degrees. The square shape can also be said to be a rectangular shape (including a square shape). Also, the square block 30 can be said to be a rectangular parallelepiped block.

[0020] The upper surface α of the base block layer 20X formed as described above is at a position higher than the upper surfaces of the railway rails 2a and 2b and is formed as a substantially flat plane (see FIG. 4). Further, in order for the upper surface α of the base block layer 20X at least on the inclined road A to support the road surface block layer 20Y formed above in a stable state, it is preferably formed wider than the upper surface β of the road surface block layer 20Y on the inclined road A, and more preferably formed wider than the upper surface β so as to overlap substantially the entire upper surface β (see FIG. 9). From the viewpoint of enhancing the economy while stabilizing the structure of the temporary road, the ratio (Xα / Yβ) of the area (Xα) of the upper surface α of the base block layer 20X on the inclined road A to the area (Yβ) of the upper surface β of the road surface block layer 20Y on the inclined road A is preferably formed such that it is 1.05 or more and 2.00 or less, more preferably formed such that it is 1.07 or more and 1.70 or less, and particularly preferably formed such that it is 1.1 or more and 1.5 or less. In the case of a temporary road having a straight road B, the upper surface α of the base block layer 20X in that portion may be formed to have the same width as the upper surface β of the road surface block layer 20Y formed above, and may be formed wider than the upper surface β of the road surface block layer 20Y as necessary.

[0021] Also, from the perspective of economy, it is preferable that the base block layer 20X is formed of a single-stage block layer as in the illustrated embodiment. Further, from the perspective of enhancing economy while stabilizing the structure, it is preferable that the height of the base block layer 20X is formed to be lower such that the ratio (XL / YL) of the length (XL) in the height direction of the base block layer 20X to the length (YL) in the height direction of the road surface block layer 20Y is 0.1 or more and 1 or less, more preferably 0.2 or more and 0.9 or less, and particularly preferably 0.3 or more and 0.8 or less (see FIG. 8). In the above embodiment, when forming the base block layer 20X, from the ease of forming the concave groove 31 straddling the railway rails 2a and 2b, etc., a concave groove block 30A having a concave groove 31 formed parallel to the long side at the bottom of the rectangular block is used, and a rectangular block or the like having such a concave groove is arranged in a stepped and shifted manner parallel to the wall surface of the platform as in the illustrated embodiment (see FIG. 5), but it is not necessarily limited to this block arrangement.

[0022] As shown in FIGS. 8 and 9, the road surface block layer 20Y formed above the base block layer 20X has an upper surface β at substantially the same height as the height positions of the platforms 1a and 1b. The upper surface β of the road surface block layer 20Y in the inclined road A is formed in a trapezoidal shape in plan view. By making the road surface block layer 20Y trapezoidal in plan view in this way, a wide temporary road 10 that can be safely used as a road can be constructed, and it becomes a structure that can reduce the amount of materials and the amount of work required for construction, and is excellent in economy. Note that the trapezoidal shape is a quadrangular shape in which a pair of opposite sides are substantially parallel, and in the present invention, the upper surface β of the road surface block layer 20Y in the inclined road A is formed in a trapezoidal shape such that one or two sides other than the pair of substantially parallel opposite sides become the hypotenuse. In particular, from the perspective of simplifying the structure of the inclined road A and making construction easier, it is preferable that the upper surface of the road surface block layer 20Y in the inclined road A is formed in a parallelogram shape in plan view, in which two pairs of opposite sides are substantially parallel and one pair of opposite sides becomes the hypotenuse. Incidentally, the road surface block layer 20Y may be composed of a plurality of blocks made of a thermoplastic resin foam, and it is sufficient to have at least one layer (one stage) of block layer having an upper surface β substantially at the same height as the height positions of the platforms 1a and 1b. However, a multi-stage road surface block layer 20Y may be formed by laminating a plurality of block layers composed of a plurality of blocks made of a thermoplastic resin foam. Also, it is preferable that both ends of the road surface block layer 20Y are in close contact with the opposing platforms respectively. However, as long as there is no hindrance to the running of heavy machinery or the like, the road surface block layer 20Y may be constructed adjacent to each other with a gap between both ends of the road surface block layer 20Y and the opposing platforms respectively.

[0023] Incidentally, as described above, when constructing a temporary road that obliquely spans between platforms in consideration of the presence of structures on the platforms, for example, as shown in FIG. 13, it is conceivable to construct a temporary road by arranging rectangular blocks having a square shape in a top view obliquely shifted in the lateral direction in a stepped manner when viewed from above. However, in this case, large dead zones (the hatched portions in the figure) that cannot be used as a road will exist on both sides of the constructed temporary road from the viewpoint of safety and the like. In a structure with such a large dead zone, a large amount of materials and work required for its construction will be involved. On the other hand, according to the temporary road for railway construction according to the present invention, it is possible to avoid structures existing on the platforms, there are few portions that cannot be used as a road, and it is possible to reduce the amount of materials required for the construction of the temporary road and the amount of work required for the construction. Further, since the road surface of the inclined road A in the temporary road for railway construction according to the present invention is formed in a trapezoidal shape in a top view, compared with the case where a temporary road is constructed by arranging rectangular blocks having a square shape in a stepped manner when viewed from above, the portion that can be used as a road is clear, and an effect of guiding the line of sight of an operator driving a heavy machine or the like can be obtained, so that the drivability of the road can also be improved.

[0024] The road surface block layer 20Y in the shape of a trapezoid in top view can be constructed by forming inclined ends γ in the shape of a triangle or a trapezoid in top view at one or both ends of the inclined road A (see Fig. 10). The inclined ends γ can be formed by blocks made of a thermoplastic resin foam containing inclined blocks 40 in the shape of a triangle or a trapezoid in top view. At this time, the hypotenuse of the inclined block 40 included in the inclined ends γ will be located on one or both ends of the road surface block layer in the inclined road A. Note that one or both ends of the road surface block layer in the inclined road A refer to one or both ends of the inclined road A in the extending direction of the temporary road. Such ends are formed adjacent to, for example, a platform. Also, the trapezoid is a quadrangular shape with a set of opposite sides being substantially parallel. In the inclined ends γ and the inclined blocks 40 in the shape of a trapezoid in top view, it is preferably formed into a trapezoid (a right trapezoid with two of the four corners being substantially 90 degrees) such that one of the two sides other than the set of substantially parallel opposite sides becomes the hypotenuse.

[0025] As an example of constructing the road surface block layer 20Y in the shape of a trapezoid in top view, first, at one or both ends of the inclined road A, a block made of a thermoplastic resin foam containing an inclined block 40 in the shape of a triangle or a trapezoid in top view is arranged such that the hypotenuse of the inclined block 40 is on the end side, and the hypotenuse of the inclined block 40 is arranged along the extending direction of the platform to construct the inclined ends γ in the shape of a triangle or a trapezoid in top view. Then, adjacent to the inclined ends γ, a plurality of square blocks 30 in the shape of a rectangle in top view are arranged, and the plurality of square blocks 30 are arranged with the end sides (a set of opposite sides in top view) of the square blocks along the extending direction of the inclined road A to construct the road surface block layer 20Y, and the like (see Fig. 10).

[0026] The inclined block 40 may require separate processing or the like to form its shape compared to the square block 30. On the other hand, by forming the inclined end γ, there is an advantage that the starting point of the road surface having a desired inclination with respect to the shortest distance direction between the platforms can be formed by a small number of inclined blocks 40 on at least one end side of the road surface block layer 20Y. And since the road surface block layer 20Y can be constructed from this starting point using the square blocks 30, the inclined road A can be efficiently constructed (see Fig. 10). Note that the thermoplastic resin foam block constituting the inclined end γ may include, in addition to the inclined block 40 having a triangular or trapezoidal shape in top view, an inclined block 40C having a right-angled pentagonal shape in top view (see Fig. 10(b)). Also, each inclined end γ may be constructed so that the positions of the joints of the thermoplastic resin foam blocks adjacent in the direction orthogonal to the extending direction of the inclined road A (road width direction) are displaced (see Figs. 10(c) and (d)).

[0027] From the viewpoint of making it easier to efficiently construct the inclined end γ, the inclined block 40 is preferably an inclined block having a right-angled triangular or right-angled trapezoidal shape in top view. Also, in this case, in the top view of the inclined block, it is preferable to arrange one side adjacent to the right angle of the inclined block having a right-angled triangular shape in top view and / or a pair of parallel opposite sides of the inclined block having a right-angled trapezoidal shape in top view along the extending direction of the inclined road A (see Fig. 10). The inclined block 40 can be an inclined block 40A having a triangular shape in top view and an inclined block 40B having a trapezoidal shape in top view, which are formed by appropriately cutting the side wall of the square block 30 having a square shape in top view using a nichrome wire cutter or the like according to the inclination angle (θ) of the inclined road A. Note that the inclined block 40 can also be said to be a prismatic block such as a triangular prism or a quadrangular prism.

[0028] In the road surface block layer 20Y described in FIGS. 6 to 9, it is constructed by laminating the block layers in two stages. For the first-stage block layer, as shown in FIGS. 6 and 7, at the start and end (both ends) of the inclined road A, two inclined blocks 40A having a triangular shape in top view are arranged such that the hypotenuse of the inclined block becomes the end, respectively forming inclined ends γ having a triangular shape in top view. Between them, square blocks 30 having a rectangular shape in top view are arranged such that the short sides of the square blocks 30 are linearly arranged along the extending direction of the inclined road A, thereby constructing it. For the second-stage block layer, as shown in FIGS. 8 and 9, at the start and end (both ends) of the inclined road A, two inclined blocks 40A having a triangular shape in top view are arranged such that the hypotenuse of the inclined block becomes the end, and two inclined blocks 40C having a right-angled pentagonal shape in top view are arranged such that the hypotenuse of the inclined block becomes the end, respectively forming inclined ends γ having a trapezoidal shape in top view. Between them, square blocks 30 having a rectangular shape in top view are arranged such that the short sides of the square blocks 30 are linearly arranged along the extending direction of the inclined road A, thereby constructing a block layer in which the position of the joint portion is shifted from that of the lower layer. In this way, by arranging the blocks with the position of the joint portion between the blocks shifted in the vertical direction of the block assembly, the structural stability of the temporary road can be further enhanced. Note that in the road surface block layer 20Y described in FIGS. 6 to 9, the short sides of the square blocks 30 are arranged linearly along the extending direction of the inclined road A. However, for example, the long sides of the square blocks 30 may be arranged linearly along the extending direction of the inclined road A.

[0029] Note that, depending on the inclination angle (θ) of the inclined road A to be constructed, the shape and dimensions of the blocks to be used, etc., as shown in Fig. 10, as the inclined blocks 40 arranged at one or both ends of the inclined road A, an inclined block 40A having a triangular shape in top view, an inclined block 40B having a trapezoidal shape in top view, an inclined block 40C having a right-angled pentagonal shape in top view, etc. are appropriately used. Further, in a temporary road having a straight road B, for example, the road surface block layer 20Y in that portion may be arranged linearly above the base block layer 20X without shifting stepwise in the same manner as the base block layer 20X in top view so that the joints do not overlap. Further, in a temporary road having inclined roads A with different inclination angles (θ), inclined blocks 40 such as inclined blocks 40A having a triangular shape in top view with different inclination angles may be arranged at one or both ends to form an inclined end portion γ. Further, when arranging the blocks 30 and 40 on the base block layer 20X, it is preferable to arrange them while adjusting the unevenness and shape by appropriately cutting each block as needed using a nichrome wire cutting machine or the like.

[0030] The upper surface β of the road surface block layer 20Y formed as described above is at substantially the same height position as the height position of the platform and is formed as a substantially flat plane (see Fig. 8). Further, it is preferable that the upper surface β of the road surface block layer 20Y at least in the inclined road A is formed to be narrower than the upper surface α of the base block layer 20X in the inclined road A (see Fig. 9). Further, it is preferable that the length (YL) in the height direction of the road surface block layer 20Y is formed to be longer than the length (XL) in the height direction of the base block layer 20X (see Fig. 8).

[0031] The above-mentioned various blocks 30 and 40 made of a thermoplastic resin foam that constitute the temporary road 10 constructed from the block assembly 20 including the base block layer 20X and the road surface block layer 20Y are preferably designed to have a length of 180 to 240 cm, a width of 90 to 120 cm, and a thickness of 40 to 60 cm from the viewpoints of transportability and work efficiency. Further, the size of the concave groove 31 formed in the leg block 30A is preferably designed to have a width of 30 to 50 cm and a height of 15 to 25 cm in view of the balance between constructability and strength. The notch of the notch block 30B and the inclined surfaces of the various inclined blocks 40 may be cut on-site.

[0032] The above blocks 30 and 40 preferably have a compressive strength in the thickness direction exceeding 100 kN / m 2 and more preferably 200 kN / m 2 or more. Although the higher the compressive strength of the block, the better, in the case of a foam, since the normal compressive strength and density are in a positive correlation, the higher the compressive strength, the greater the weight tends to be. Therefore, the upper limit of the compressive strength in the thickness direction of the block is preferably approximately 800 kN / m 2 from the viewpoints of light weight and constructability. In this specification, the above compressive strength is the compressive stress at 10% deformation based on a compression test according to JIS K 7220 (1999). Also, the density of the above blocks 30 and 40 is preferably 12 kg / m 3 or more and 100 kg / m 3 or less from the viewpoints of being lightweight and having good strength, more preferably 15 kg / m 3 or more and 60 kg / m 3 or less, and even more preferably 20 kg / m 3 or more and 50 kg / m 3 or less.

[0033] Examples of the base resin of the thermoplastic resin foam constituting the blocks 30 and 40 include polystyrene-based resins such as polystyrene and high-impact polystyrene, polyolefin-based resins such as polyethylene and polypropylene, polyester-based resins such as polybutylene succinate, polyethylene terephthalate, and polylactic acid, polycarbonate-based resins, polyurethane-based resins, and polyphenol-based resins. Among them, from the viewpoints of properties such as light weight, water resistance, and durability, and cost, it is preferable to use a foam having a polystyrene-based resin as the base resin.

[0034] Examples of the foam include a foam particle molded body and an extrusion foam molded body. As the blocks 30 and 40 of the present invention, a polystyrene-based resin foam particle molded body or a polystyrene-based resin extrusion foam molded body can be preferably used. Note that the foam particle molded body refers to a body obtained by filling thermoplastic resin foam particles into a molding die and heating them with steam or the like for in-die molding. On the other hand, the extrusion foam molded body refers to a body obtained by forming a foamable resin melt by containing a foaming agent in a resin heated and melted in an extruder and foaming and molding the melt by extruding it under a pressure lower than that in the extruder.

[0035] However, it is more preferable that at least one of the concave groove blocks 30A, notch blocks 30B, and various inclined blocks 40A, 40B, 40C is formed by laminating a plurality of plate-shaped polystyrene-based resin extrusion foam molded bodies or a plurality of plate-shaped polystyrene-based resin foam particle molded bodies. This is because a block formed by laminating a plurality of foam plates can absorb and disperse the load from above due to interlayer displacement, etc., and the laminated surface contributes to strength improvement, resulting in a stronger structure. In particular, in the case of laminating a plurality of polystyrene-based resin extrusion foam molded bodies, it is particularly preferable because it has an excellent balance between compressive strength and flexural strength. As a method of laminating a plurality of foam plates, there are methods such as adhering each foam plate with an adhesive, heat, etc., and simply laminating each foam plate without adhesion and bundling it with a band around the outer periphery. In the embodiment of FIG. 11, an integral molded product of the concave groove block 30A, notch block 30B, and inclined block 40A having a triangular shape in top view, and a laminated product are shown.

[0036] On the upper surface of the block assembly 20 including the above-described base block layer 20X and road surface block layer 20Y, specifically, on the upper surface β of the road surface block layer 20Y, as shown in FIG. 12, the protection plate 50 can be laid side by side as needed. Examples of the protection plate 50 include well-known wooden plywood used for subgrade curing and ground securing at construction sites, etc., or plastic resin plates, rubber resin plates, etc. Among them, wooden plywood having flexibility and frequently used at construction sites is particularly preferably used. Among wooden plywood, structural plywood defined by JAS (Japanese Agricultural and Forestry Standards) is particularly preferably used, and specifically, structural plywood conforming to JAS Class 1, etc. can be mentioned. Further, the thickness of the protection plate 50 is preferably 9 to 18 mm in consideration of the balance between strength and flexibility (flexibility). The length and width dimensions of the protection plate 50 are preferably 100 to 200 cm in length and 40 to 100 cm in width from the viewpoints of transportability, work efficiency, etc.

[0037] According to the temporary road 10 and its construction method according to the present invention described above, since it has the inclined road A constructed obliquely with respect to the shortest straight-line distance direction between the platforms, it becomes a temporary road that avoids structures such as the stairs 3 and the platform fence 4 existing on the platform, and can secure a traveling road that is easy for heavy machinery and the like to move on. Further, since the temporary road 10 is constructed by the block assembly 20 composed of a plurality of blocks 30 and 40 made of thermoplastic resin foam, the main operations of its construction work and removal work are the moving operations of the lightweight blocks 30 and 40 made of thermoplastic resin foam. Therefore, its construction and removal can be easily performed in a short time. Further, when a heavy machine such as a vehicle loaded with construction materials drives in, the load accompanying the passage of the heavy machine is absorbed and dispersed by the deformation of the stacked blocks 30 and 40, and further, when the protective plate 50 laid on the upper surface has flexibility, the load is absorbed and dispersed by the deformation of the protective plate. Thus, the destruction of the stacked blocks 30 and 40 is effectively prevented, and it becomes a highly reliable temporary road. Furthermore, the block assembly 20 constituting the temporary road 10 includes a base block layer 20X that forms a substantially flat upper surface α at a position higher than the upper surface of the railway rail, and a road surface block layer 20Y that is stacked on the base block layer and forms an upper surface β having substantially the same height as the height position of the platform. Since the upper surface of the road surface block layer 20Y in the inclined road A is formed in a trapezoidal shape in plan view, the entire surface of the road surface block layer 20Y can be used as a road, and it becomes a structure that can reduce the amount of materials and the amount of work required for construction, and is also excellent in economy.

[0038] Although the embodiments of the temporary road for railway construction and its construction method according to the present invention have been described above, the present invention is not limited to the above-described embodiments at all, and it is natural that various modifications and changes can be made within the scope of the technical idea of the present invention described in the claims.

Industrial Applicability

[0039] According to the present invention, it is possible to provide a temporary road for railway construction that avoids structures existing on the platform, is easy to construct and remove, has high reliability, and is excellent in economy. Therefore, as a temporary road connecting between platforms and a construction method thereof, it can be widely used.

Explanation of Signs

[0040] 1a, 1b Platform 2a, 2b Railway rail 3 Staircase 4 Platform fence 5 Trough 10 Temporary road 20 Block assembly 20X Base block layer 20Y Road surface block layer 30 Square block 30A Grooved block 30B Notched block 31 Groove 32 Notch 40 Inclined block 40A Inclined block with a triangular shape in top view 40B Inclined block with a table shape in top view 40C Inclined block with a right-angled pentagonal shape in top view 50 Protection plate A Inclined road B Straight road α Upper surface of the base block layer β Upper surface of the road surface block layer γ Inclined end

Claims

1. A temporary road for railway construction built between platforms, wherein the temporary road for railway construction has an inclined road built obliquely with respect to the shortest straight-line distance direction between the platforms, and the temporary road for railway construction is constructed by an aggregate of blocks composed of a plurality of thermoplastic resin foam blocks, the block aggregate includes a base block layer forming a substantially flat upper surface at a position higher than the upper surface of the railway rail, and a road surface block layer laminated on the base block layer and forming an upper surface at substantially the same height as the height position of the platform, characterized in that the upper surface of the road surface block layer in the inclined road is formed in a trapezoidal shape in plan view, A temporary road for railway construction.

2. One end or both ends of the road surface block layer in the inclined road are constructed by inclined end portions in a triangular or trapezoidal shape in plan view, which are formed by thermoplastic resin foam blocks including inclined blocks in a triangular or trapezoidal shape in plan view,

3. The road surface block layer in the inclined road is constructed by the inclined end portion and a plurality of square blocks in a rectangular shape in plan view, wherein the square blocks are arranged adjacent to the inclined end portion, and the side edges of the square blocks are arranged along the extending direction of the inclined road,

4. The base block layer in the inclined road is constructed by arranging a plurality of square blocks in a rectangular shape in plan view in a stepped shape in plan view,

5. The upper surface of the road surface block layer in the inclined road is formed in a parallelogram shape in plan view,

6. The upper surface of the base block layer in the inclined road is formed wider than the upper surface of the road surface block layer in the inclined road,

7. The angle formed between the shortest straight-line distance direction between the platforms and the extending direction of the inclined road is formed to be 5 degrees or more and 60 degrees or less,

8. The above-mentioned base block layer includes a concave groove block having a concave groove at the bottom of the block, and the concave groove block is arranged across the railway rail by the concave groove. The temporary road for railway construction according to claim 1 or 2, characterized in that.

9. The temporary road for railway construction according to claim 1 or 2, characterized in that a protection plate is placed on the upper surface of the above-mentioned road surface block layer.

10. A method for constructing a temporary road for railway construction, in which a temporary road having an inclined road constructed obliquely with respect to the shortest straight-line distance direction between platforms is constructed between platforms by a block aggregate composed of a plurality of blocks made of thermoplastic resin foam, The above-mentioned block aggregate is composed of a base block layer that forms a substantially flat upper surface at a position higher than the upper surface of the railway rail, and a road surface block layer that is laminated on the base block layer and forms an upper surface at substantially the same height as the height position of the platform, Characterized in that the upper surface of the road surface block layer in the above-mentioned inclined road is constructed in a trapezoidal shape in plan view. A method for constructing a temporary road for railway construction.

11. The method for constructing a temporary road for railway construction according to claim 10, characterized in that a block made of thermoplastic resin foam including an inclined block having a triangular or trapezoidal shape in plan view is arranged at one end or both ends of the road surface block layer in the above-mentioned inclined road to construct an inclined end portion having a triangular or trapezoidal shape in plan view.

12. The method for constructing a temporary road for railway construction according to claim 11, characterized in that a plurality of square blocks having a rectangular shape in plan view are arranged adjacent to the above-mentioned inclined end portion, and the end sides of the square blocks are arranged along the extending direction of the inclined road to construct the road surface block layer in the inclined road.

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