JP2002038416A - Structure of temporarily provided bridge for railway - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure for securing the downward space of a temporarily provided bridge to the maximum and capable of coping with non-broken line erection. SOLUTION: In the structure of a temporarily provided bridge which is composed of a main truss providing a plurality of oblique girders between a pair of side girders of a lower side girder and an upper side girder, a traverse girder provided in the direction of intersecting with the lower side girder of the main truss being in the direction of laying a rail at a proper interval, and the rail laid on the traverse girder, the traverse girder comprises an intermediate part laying the rail and a pair of arm parts positioned at both the sides of the intermediate part. The arm part is fixed between the ends of the lower side girders of the main truss, a connection plate is provided to be fixed and fixed on the main truss so as to be integrated with the oblique girder of the main truss positioned on both the sides, two vertical girders are disposed in parallel so as to sandwich the rail on the traverse girder in parallel to the direction of laying the rail, a rail receiving base stretched over the bottom part of the vertical girder is arranged between the vertical girders, the center of the rail receiving base recesses a sleeper housing groove to house a sleeper, and the rail is laid on the sleeper and the traverse girder.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a railway temporary bridge.

[0002]

2. Description of the Related Art An example of the structure of a conventional railway temporary bridge will be described with reference to FIGS. First, a transverse girder a is installed between both side girders e constituting a bridge main body composed of a truss, a plate girder or the like. The cross beam a
It is a girder arranged in a direction crossing the laying direction of the rail d. A vertical girder b is set on the cross girder a (FIGS. 9 and 11) or on the antinode of the cross girder a (FIG. 10) in parallel with the laying direction of the rail d. Set the sleeper c in the direction. The rail d is laid on the sleeper c to construct a temporary railway bridge. Therefore, the height h from the rail surface to the lower surface of the cross beam is:
The height from the lower end of the cross girder to the lower end of the side girder + the height of the cross girder + the height of the sleeper protruding from the cross girder + the height of the rail d. It is known that a space below the girder of a temporary bridge for railways is secured by the above structure, and some structure is constructed there.

[0003]

In view of the fact that the above-mentioned conventional temporary bridge for railways is used for the purpose of constructing some kind of structure in the space below the girder, the following structure is required for the structure. It can be seen that there are various requests. <B> In order to minimize the amount of excavated soil below the girder of the temporary bridge for railways, it is desirable to set the upper end of the construction limit of the structure to be built under the girder as high as possible. Therefore, the lower end of the railway temporary bridge, which hinders the construction limit of the structure, is installed as high as possible. <B> In order to reduce the amount of earthwork necessary for installing a temporary bridge for railways as much as possible and to temporarily install a temporary bridge for railways, the abutment shall be installed as shallow as possible. <C> The period during which the orbit cannot be used shall be as short as possible. <D> Since the rail height is a predetermined position that is more continuous than before the bridge, the height from the rail to the lower end of the temporary bridge for railways,
Alternatively, when the height from the rail to the lower end of the temporary seat for a railway bridge is high, uneconomical measures such as an increase in excavated soil volume and an increase in the size of the abutment are required. <E> We will respond to the request for an installation method (no broken line installation) that will be used as a rail for a railway temporary bridge without removing the existing rail.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to reduce the height of the space below a temporary bridge for railways while the height of the rail surface is fixed. It is an object of the present invention to provide a railway temporary bridge structure that can secure the maximum and can support the construction without a broken line.

[0005]

As means for solving the above-mentioned problems, the present invention provides a main structure in which a plurality of slanted girders are arranged between a pair of side girders of a lower girder and an upper girder. And a crossing girder disposed at appropriate intervals in a direction intersecting the lower side girder of the main structure, which is a rail laying direction, and a rail laying on the crossing girder, and a railway temporary bridge. In the structure, the cross beam includes an intermediate portion on which a rail is laid and a pair of arms located on both sides of the intermediate portion. Along with fixing in between, the connecting plate is arranged and fixed so as to be integral with the oblique girder of the main structure located on both sides thereof, and fixed to the main structure, and on the crossing girder, the rail laying direction and In parallel, two stringers are arranged in parallel so as to sandwich the rail. A temporary rail bridge is provided, in which a rail cradle to pass is arranged, and the center of the rail cradle is recessed in a sleeper storage groove to store a sleeper, and a rail is laid on the sleeper and the cross beam. Structure. Further, according to the present invention, in the above-mentioned structure of the railway temporary bridge, a cross girder arranged in a direction crossing the rail laying direction includes an intermediate portion where the rail is laid, and a lower girder of the main structure on both sides of the intermediate portion. A temporary bridge for a railway, comprising a pair of arms fixed to the intermediate portion, wherein the intermediate portion and the pair of arms are integrally formed. Further, according to the present invention, in the above-mentioned structure of the railway temporary bridge, a cross girder arranged in a direction crossing the rail laying direction includes an intermediate portion where the rail is laid, and a lower girder of the main structure on both sides of the intermediate portion. The intermediate portion and the pair of arm portions are divided into a pair, and the intermediate portion is integrally connected between the arm portions between the pair of arm portions fixed to the main structure side. This is a temporary bridge structure for railways. Further, according to the present invention, in any one of the above-mentioned structures of the railway temporary bridge, the cross girder arranged in the direction crossing the rail laying direction has a center position where the rail and the vertical girder are bridged, more than both ends thereof. This is a temporary bridge structure for railways, characterized by being installed at a low position. Further, the present invention provides any one of the above-mentioned structures of the railway temporary bridge, wherein at least one upper girder located near the center of the railway temporary bridge is replaced with another upper girder among the upper girder constituting the main structure. The temporary bridge for railways is characterized in that a temporary bridge for railways is provided with an overhang by making the overall length longer than the side girders. The present invention provides a main structure in which a plurality of oblique girder is arranged between a pair of side girder of a lower side girder and an upper side girder for temporarily supporting an existing rail supported via a sleeper or the like. A method of erection of a temporary bridge for railways, comprising: a cross girder disposed at appropriate intervals in a direction intersecting a lower side girder of the main structure, which is a laying direction of the rail; In the meantime, a rail supporter for supporting a rail from below with the sleeper is provided, the sleeper is removed while supporting the rail on the rail supporter, and a cross beam is provided in a space formed by removing the sleeper. Then, two vertical girders are placed on the cross girder, parallel to the rail laying direction, and positioned so as to sandwich the rail, and each rail girder is connected to each of the vertical girders. Hang the cradle on the girder and support it, and install temporary bridges at both ends of the cross girder. The Shu構 that formed connected so as to be respectively integral makes it possible to temporarily support the rails by railroad, bridges without dashed existing rail, the structure of the railroad, bridges.

[0006]

Embodiment 1 An example of the structure of a railway temporary bridge will be described below with reference to the drawings. In the embodiment of the present invention, the cross beam to be passed between the side beams forming the bridge body is divided into a pair of arms and an intermediate portion provided on the side beam side, and the cross beam has a boat shape. Next, an example in which the intermediate portion is located below the arm portion will be described.

<A> Overall Structure As shown in FIG. 1, the structure of the railway temporary bridge according to the present invention has a main structure 1 in which an inclined girder 13 is arranged between a lower girder 11 and an upper girder 12. And a transverse girder 3 that extends between the main structures 1 in a direction transverse to the laying direction of the rail 2 and is connected to the lower girder 11 and the inclined girder 13, and is parallel to the laying direction of the rail 2 on the transverse girder 3. , And a rail support 5 attached to the vertical girder 4, wherein at least one of the upper girder 12 of the main structure 1 is longer than the other upper girder 12. That is, the structure of the railway temporary bridge of the present invention includes a joining structure of the main structure 1 constituting the bridge main body and the cross beam 3 laying the rail 2, a support structure of the rail 2 laid on the cross beam 3, and a plurality of structures. It is characterized by the structure of the main structure 1 consisting of the lower girder 11 and the upper girder 12 connected together, and the combination of these three structures. The following describes each structure.

<B> Structure of crossing girder As shown in FIGS. 1 and 2, the crossing girder 3 is a girder crossing the lower side girder 11 of the main structure 1 in a direction crossing the rail 2 laying direction. There is a member for laying the rail 2 and the stringer 4. The cross beam 3 in the present embodiment is a lower side beam 1
1 and a pair of arms 31 integrally connected to
It is composed of an intermediate portion 32 fitted between the bridges, and the cross girder 3 fills the building limit of the structure to be built in the space below the railway temporary bridge.
To lower the position of the middle part 3 than the arms 31 and 31
An example in which the boat 2 is fitted so that it is positioned below will be described. As shown in FIG. 1, the connection of the cross beam 3 to the main structure 1 is performed by connecting the web portion 311 of the arm portion 31 of the cross beam 3.
The fixing is performed between the ends of the lower girder 11 and the inclined girder 13 of the adjacent main structure 1. At this time, as shown in FIG.
Is provided with a vertical connecting plate 111 for fixing the web portion 311 of the arm 31.
1 and the web portion 311 are fixed by known bolting or the like, and the butted portion of the lower side girders 11 is
2 and the connecting plate 6 is fixed between the two members so that the arm 31 and the oblique girder 13 are integrated. At this time, the horizontal connecting plate 131 connected to the end of the connecting plate 6 disposed on the upper surface of the arm 31
The arm 31 can be firmly attached to the main structure 1 by fixing the end of the connecting plate 6 provided on the upper surface of the arm 31 to the horizontal connecting plate 131 of the oblique girder 13. By providing a plurality of horizontal connecting plates 131 on the oblique girder 13, it is possible to change the girder height of the mounting part of the arm 31 of the cross girder 3 to the main structure 1, and the rigidity necessary for supporting the arm 31 is provided. It is possible to employ various known structures having the following. This makes it possible to form a rigid and rigid structure between the main structure 1 and the cross beam 3 with a necessary and sufficient rigidity. As shown in FIG. 2, the intermediate portion 32 of the cross beam 3 is lowered below the arms 31, 31 fixed to the lower side beam 11 and the inclined beam 13 constituting the main structure 1 to form a boat shape. Fit between the ends. By dividing the cross beam 3 into the arms 31 and the intermediate portion 32, it is possible to construct a railway temporary bridge without making the existing rail 2 broken.

As shown in FIGS. 2, 4 and 5, two vertical beams 4, 4 per rail are arranged on both sides of the existing rail 2. Thereafter, the rail support 5 and the short sleeper 7 are installed below the intermediate rail 2 between the existing sleepers (not shown).
Next, the existing sleepers (not shown) are removed, and the intermediate portion 32 of the cross beam 3 is set at a predetermined position. Arm 3 of cross beam 3
1 and a lower girder 13 and a slant girder 13 of the main structure 1 in which the girder 1 is previously installed
Is disposed at a predetermined position, and the intermediate portion 32 of the cross beam 3 and the arm portion 3
1 to complete the construction of a temporary railway bridge. When the broken line of the existing rail 2 is possible, the temporary bridge for railway can be erected at a predetermined position by means of suspension or lateral pull. It is needless to say that the cross beam 3 can be an integral beam in addition to being divided into the arm portions 31 and 31 and the intermediate portion 32 as described above.

<C> Rail support structure As shown in FIGS. 2, 4 and 5, the rail 2 is provided between the lower side girders 11 and 11 and the oblique girder 1 of the opposing main structure 1 as described above.
It is laid on the cross beam 3 bridged between 3 and 13. At this time, since it is difficult to stably support the rail 2 using only the cross beam 3, a structure for supporting the rail 2 is provided also in a space between the cross beams 3 and 3. First, FIGS. 4 and 5
As shown in (2), two stringers 4 and 4 are laid in parallel on one cross beam 3 and the next cross beam 3. This column 4 is 1
One rail is disposed on each side of the rail. Subsequently, as shown in FIG. 5 and FIG.
A rail support 5 is provided between them. The rail support 5
Both ends are connected to the bottom of each of the two longitudinal beams 4,4. Further, as shown in FIG. 6, a sleeper accommodating groove 51 for accommodating the short sleeper 7 required for laying the rail 2 is formed in the center of the rail receiving base 5. The member serving as the short sleeper 7 is stored in the sleeper storage groove 51. The height of the short sleeper 7 is adjusted by applying known means such as, for example, disposing a shoe in the sleeper receiving groove 51. This short sleeper 7
Uses a stand-alone sleeper in which one short sleeper 7 is installed under one rail 2. The rail 2 is laid on the short sleeper 7. Thus, one rail 2 can be laid on the cross beam 2 and on the short sleepers 7 of the respective rail supports 5. With the same structure as above, another parallel rail 2 is laid, and the laying of one set of rails 2 is completed. As described above, by laying the vertical girders 4 and 4 on both sides of the rail 2, it is possible to mount the rail support 5 that supports the rail 2. As a result, the force for supporting the rail 2 is transferred from the rail support 5 to the girder 4,4, from the girder 4,4 to the cross girder 3, and from the cross girder 3 to the main structure 1 (lower girder 1).
1, and can be transmitted to and supported by the oblique girder 13).

With the rail support structure as described above, the following effects can be obtained. That is, in the above structure, FIG.
As shown in the figure, a rail support 5 for receiving the rail 2 is attached to the bottom surface of the longitudinal beams 4, 4, and the rail 2 is mounted thereon. The depth of the sleeper storage groove 51 recessed in the rail support 5 can be set freely. However, as shown in FIG. 6, the lower surface of the rail 2 cannot be installed below the cross beam 3. Therefore, the position of the rail 2 is determined by the upper surface of the cross beam 3. As described above, as shown in FIG. 2, the distance from the upper surface of the rail 2 to the lower surface of the cross girder 3 in the structure of the railway temporary bridge of the present invention is [rail height] + [cross girder height]. is there. On the other hand, in the structure of the conventional railway temporary bridge, as shown in FIG. 9, this is [the height of the cross beam] + [the height of the vertical girder] + [the height of the sleeper] + [the height of the rail] Met. Furthermore, in the case of FIG.
Since the stringers require a corresponding girder height, the height of the transverse girder is limited by the height of the girder. Since the span length of the rail support 5 is smaller than the span length of the vertical girder in FIG. 10, the height of the rail support is lower than the vertical girder connected to the antinode of the cross girder. With the above points and the cross girder being in the shape of a boat, eliminating the useless space thereunder, the structure of the present invention can greatly reduce the height from the lower end of the temporary bridge for railway to the rail surface. .

<D> Structure of Main Structure As shown in FIG. 1, the main structure 1 includes a lower girder 11 and an upper girder 1.
2 is a member formed by disposing a slanted girder 13 between them. The main structure 1 is configured by arranging the oblique girder 13 while connecting a plurality of lower girder 11 and further connecting the upper girder 12. At this time, as shown in FIG. 7, the total length of the lower girder 11 and the upper girder 12 is the same length, but at least one of the upper girder 12 located near the center of the railway temporary bridge is used. , An extension side girder 14 longer than the other upper side girder 12 is used. As a result, the upper girder group 12 of the main structure 1 is replaced with the lower girder 11.
Make it longer than the group and give a lift to the temporary railway bridge to be built. Raising is given to warp the railway temporary bridge upward in advance in order to prevent the railway temporary bridge itself from warping downward due to the weight of the railway temporary bridge. This makes it possible to construct the railway temporary bridge by warping it upward, and to return the railway temporary bridge to a substantially horizontal level by its own weight (dead load). According to the scale of the temporary bridge for railway constructed in this way, at least one upper side girder 12 of the main structure 1 is an extended side girder 14 whose entire length is adjusted to an appropriate length, so that it can be of any size. It is possible to give an appropriate overhang to the temporary bridge for railways.

Hereinafter, as an example of a construction method for obtaining the structure of a railway temporary bridge according to the present invention, a non-dashed line construction method capable of constructing a temporary bridge without resting an existing track will be described.

<B> Temporary rail installation process In order to construct a structure below the existing rail,
Excavate the ground below the rail. At this time, it is necessary to support the rails instead of the sleepers. First, a rail support is inserted and arranged between sleepers supporting the existing rail. The rail cradle has a sleeper storage groove, in which a short sleeper is provided. Thus, the rail is supported by the rail support and the short sleeper placed on the ground, and the rail support member is switched from the existing sleeper to the rail support and the short sleeper.

<B> Removal of sleepers and installation of intermediate part of cross beam According to the above-described process, rails are supported by rail supports and short sleepers in place of existing sleepers, and then divided in place of existing sleepers. The intermediate part, which is a component of the cross beam, is provided. After removing the existing sleepers from beneath the rails, excavate the ground after removal of the sleepers to the extent that the middle part of the cross beam can be inserted, with the rails supported by the rail supports and short sleepers. Then, after removing the existing sleepers located between the rail supports under the rails, the intermediate portion of the cross beam is inserted and disposed. With this, the rail, rail cradle and short sleeper,
Supported by the middle of the cross beam.

<C> Arrangement process of the stringers The stringers are arranged so as to straddle the rail support and the short sleeper, which support the rails in the above-mentioned steps, and the intermediate portion of the cross beam. The stringers are arranged one by one on both longitudinal sides of one rail. The stringers are fixedly mounted on a flat surface of a rail support having a pair of rails. The stringers are fixedly mounted on the middle of the cross beam. As described above, the rail is supported by the rail support and the short sleeper and the intermediate portion of the cross beam via the vertical beam. More specifically, by mounting and supporting two vertical girders to which the rail supports that support the rails are mounted on the middle part of the cross girder, the rail support points (between the middle parts of the cross girder) While providing a large number of rail supports, the rail can be supported by the intermediate portion of the cross beam.

<D> Step of Connecting Middle Part of Crossing Girder to Main Structure The middle part of the crossing girder supporting the rail has a crossing girder having both ends fixed to a main structure which is a constituent member of a temporary bridge. It is erected by connecting it to the arm of the robot. The intermediate portion of the cross beam is connected at both ends to arms provided on the main structure. The connection between the intermediate portion and the arm portion is performed by a known means such as an attachment plate so as to obtain high rigidity. As a result, the main structure is positioned on both sides of the rail, and the middle portion of the cross beam is connected to the arm so as to be sandwiched therebetween and supported by the main structure. That is, the rail is supported by the main structure constituting the temporary bridge by this process.

<E> Temporary rail mounting process by excavating the surrounding ground Each intermediate part of the cross beam is connected to each arm on the main structure side to complete the temporary bridge, so that the rail is supported by the temporary bridge. Therefore, it is possible to excavate the ground below the rail where the temporary bridge is provided. According to the steps described above, the rail is installed in a non-dashed line state in which the vehicle can always run without being broken once.

[0019]

[Embodiment 2] In the above embodiment, the structure in which one cross beam is installed has been described. However, as shown in FIG.
Crossing girder 3 arranged in the direction crossing the laying direction of rail 2
May be formed on a straight line extending straight between the lower side girders 11 and 11. Further, the configuration of the cross beam 3 may be divided into a pair of arms and an intermediate portion, or may be integrally formed.

[0020]

According to the present invention, as described above, the following effects can be obtained. <B> The available space under the temporary bridge for railways is below the lower edge of the bridge body supporting the girder, but by reducing the distance from the upper surface of the rail to the lower surface of the girder, The upper limit of the available space can be greatly increased upward.

<B> Therefore, when a temporary railway bridge is constructed for the purpose of constructing a structure in the lower space, the construction limit of the structure is higher than that of the conventional temporary bridge. It is possible to set.

<C> By adjusting the total length of at least one upper side girder constituting the main structure to an appropriate length,
It is possible to give appropriate overhangs to temporary bridges for railways.

<D> The combination of the vertical girder supported by the cross girder and the rail cradle supported by the vertical girder enables the existing rail to be supported on the railway temporary bridge without dashed lines. Thus, it is possible to obtain a structure of a railway temporary bridge by erection without a broken line.

[Brief description of the drawings]

FIG. 1 is an explanatory view of the structure of a railway temporary bridge according to the present invention.

FIG. 2 is a view taken along the line II-II in FIG.

FIG. 3 is an explanatory view of a structure for fixing a transverse girder to a main structure.

FIG. 4 is an explanatory view of a rail support structure.

FIG. 5 is a cross-sectional view of a rail support structure.

FIG. 6 is an explanatory view of a rail support.

FIG. 7 is an explanatory view of the structure of the main structure.

FIG. 8 is an explanatory view of a cross girder according to Embodiment 2 of the present invention.

FIG. 9 is an explanatory view 1 of a rail support structure in a conventional temporary bridge structure for railways.

FIG. 10 is an explanatory view 2 of a rail support structure in a conventional temporary bridge structure for railways.

FIG. 11 is an explanatory view of the structure of a conventional railway temporary bridge.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiromichi Maruyama 2-2-2 Yoyogi, Shibuya-ku, Tokyo East Japan Railway Company (72) Inventor Junko Himeno 2-2-2 Yoyogi, Shibuya-ku, Tokyo No. Tohoku Japan Railway Company (72) Inventor Tadayuki Maruyama 1-1-11 Kusunokidai, Tokorozawa-shi, Saitama In-house Seibu Construction Co., Ltd. (72) Inventor Hidetaka Taichi 1-111 Kusunokidai, Tokorozawa-shi, Saitama 2 Seibu Construction Co., Ltd. (72) Inventor Michio Nakayama 1-11-11 Kusunokidai, Tokorozawa-shi, Saitama 2 Seibu Construction Co., Ltd. (72) Inventor Shingo Hisamatsu 4-1-113, Toyo, Koto-ku, Tokyo Toyo-sen 2D059 BB19 BB33 GG55 GG63 in Tralville Hirose Corporation

Claims (5)

[Claims] 1. A main structure constituted by arranging a plurality of slanted girders between a pair of side girders of a lower side girder and an upper side girder, and intersects with a lower side girder of the main structure, which is a rail laying direction. In the structure of a railway temporary bridge, comprising a cross girder disposed at appropriate intervals in the direction and a rail laid on the cross girder, the cross girder is an intermediate portion where a rail is laid, And a pair of arms positioned on both sides of the main part, the arm of the cross beam is fixed between the ends of the lower side beams of the main structure, and is integrated with the oblique girder of the main structure positioned on both sides thereof. A connecting plate is arranged and fixed so as to be fixed to the main structure. On the transverse girder, two stringers are arranged in parallel with the rail laying direction and in parallel with the rail therebetween. And, between the stringers, a rail cradle to be bridged to the bottom of the stringer is arranged, and the center of the rail cradle is a sleeper bracket. Sleepers were housed recessed groove, characterized in that laying the rails on the sleepers, the structure of the railway, bridges. 2. The structure of a temporary bridge for a railway according to claim 1, wherein the cross beam arranged in a direction crossing the rail laying direction has a middle part where the rail is laid and main structures at both sides of the middle part. Consists of a pair of arms fixed to the lower side girder of
A temporary bridge structure for railways, wherein the intermediate portion and a pair of arms are integrally formed. 3. The construction of a temporary bridge for a railway according to claim 1, wherein the crossing girder arranged in a direction crossing the rail laying direction has an intermediate portion where the rail is laid and main structures at both sides of the intermediate portion. Consists of a pair of arms fixed to the lower side girder of
A temporary bridge structure for a railway, wherein the intermediate portion and the pair of arms are divided and the intermediate portion is integrally connected between the pair of arms fixed to the main structure side. 4. The temporary bridge for a railway according to claim 1, wherein the cross girder arranged in a direction crossing the rail laying direction is a central girder spanning the rail and the vertical girder. A temporary bridge structure for railways, characterized in that the structure is installed at a position lower than both ends thereof. 5. The temporary bridge for a railway according to claim 1, wherein at least one of the upper girders constituting the main structure is located near the center of the temporary bridge for the railway. A temporary bridge structure for railroads, wherein the upper girder is a girder having a longer overall length than the other upper girder, thereby giving a lift to the temporary bridge for railways.