JPH11264103A - Elevation method of existing transportation bedrock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To move a road or a railway on an elevated position without requiring any excessive area acquisition while serving for the existing road or railway as it is. SOLUTION: In an elevation method of the existing transportation bedrock, first of all, columnar piers 11 and 11 are erected on both sides of an electric train train 2 as the transportation bedrock serving for an operating route and, at the same time, a beam 12 is laid over in the vicinity of the tops of them to construct frame structure 13 (step 101). Then, brace members 14 and an energy absorbing damper 15 are mounted to the frame structure 13 to construct the lower structure 10 of an elevated bridge (step 102). When the lower structure 10 of the elevated bridge is constructed, the upper structure 5 constituted of bridge girders, floor boards, etc., is laid over on the lower structure in the direction of the bridge axis and successively, a track 6 as a new transportation bedrock is laid on the upper structure (step 103). Then, the track 2 is removed, the transportation bedrock serving for the operating route is switched to the track 6 (step 104).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevated method of an existing transportation base mainly used for roads, railways and the like.

[0002]

2. Description of the Related Art Bridges such as roads and railways include so-called viaducts which are continuously constructed in an urban area, in addition to narrow bridges which cross rivers and straits. Such viaducts are
From the viewpoint of efficient land use, it is constructed continuously in the space on roads, railways or rivers, and when roads and roads or roads and railways intersect on a plane, any of them is By using a viaduct, traffic congestion can be eliminated.

[0003] In the case of constructing a viaduct above a road or a railway in service, the following problems occur.

[0004] That is, in a viaduct of a road or a railway, the foundation beam 1 is indispensable for its lower structure as shown in FIG. 4 in order to generally secure horizontal rigidity in a direction perpendicular to the bridge axis. Therefore, as shown in FIG. 5 (a), for example, when the track 2 is being used as a business route, in order to construct a viaduct at the track site and move the business route onto the elevated route, first, FIG. As shown in (1), the track 2 is temporarily relocated to a side site of the viaduct construction space as a temporary track 3, and then the track 3 is used as a business route during the construction period, and the lower structure of the viaduct having the foundation beam 1 is used. Build 4. After the viaduct lower structure 4 is completed, the temporary track 3 is removed and the viaduct upper structure 5 is removed.
In general, the procedure is such that a track 6 newly laid on the road is used as a business route.

[0005]

However, in such a procedure, a site for laying the temporary track 3 must be secured on the side of the viaduct during the construction period. On the other hand, in densely populated areas where private houses are approaching, there has been a problem that it is extremely difficult to elevate railways and roads.

[0006] The present invention has been made in view of the above-mentioned circumstances, and is intended to relocate an existing road or railroad to an elevated road without using extra land while still using the existing road or railroad as it is. It is an object of the present invention to provide an elevated method of an existing transport base that can perform the above.

[0007]

In order to achieve the above object, an elevated method of an existing transport base according to the present invention is provided on both sides of an existing transport base for running transportation means as described in claim 1. A pillar-shaped pier is erected and a beam is bridged near the top to form a ramen structure. A predetermined brace material is attached to the ramen structure to form a viaduct lower structure. Then, a new transport base is provided on the upper structure, and the transport base of the transportation means is switched to the new transport base.

In the method for elevating an existing transportation base according to the present invention, a predetermined brace material is disposed in an in-plane space including a pair of columnar piers and beams, and the brace material is used in a horizontal direction orthogonal to the bridge axis. Rigidity is ensured.

Therefore, the deformation of the ramen structure when a horizontal force acts in the direction is sufficiently suppressed without installing a foundation beam, and there is no need to temporarily move the existing transport base to another place. .

[0010] The means of transportation includes automobiles, trains, monorails, and the like, and roads and tracks for running them correspond to their transportation bases.

The structural form of the ramen structure includes a reinforced concrete structure, a steel frame structure, a steel reinforced concrete structure, and the like.

The brace material may be one that resists both directions of compression and tension, or one that resists only in the tensile direction. As the material, a steel frame material, a PC steel wire or the like can be used.

The structure of the upper structure is arbitrary as long as it can provide a transport base for running the above-mentioned transportation means, and the conventional structure using a heavy concrete slab is used. (Ramen type) The upper structure, of course, is a type of upper structure that aims to reduce the overall weight by bridging the desired number of girder that supports only a single line of the railway so that it becomes a double track, double track, etc. Naturally, the superstructure described in Japanese Patent Application No. 9-312039) is also included.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of an elevated method of an existing transport base according to the present invention will be described with reference to the accompanying drawings. It is to be noted that the same reference numerals are given to components and the like that are substantially the same as those in the conventional technology, and description thereof will be omitted.

FIG. 1 is a flowchart showing a procedure of an elevated method of an existing transport base according to the present embodiment. As can be seen from the figure, in the method for elevating the existing transport base according to the present embodiment, as shown in FIG. 2 (a), first, both sides of the train track 2 as the transport base which is being used as a business route. The pillar piers 11 and 11 are erected and a beam 12 is bridged near the top to construct a ramen structure 13 (step 101). Here, since it is not necessary to construct a foundation beam for connecting the leg portions of the columnar pier 11, it is not necessary to replace the track 2 during the construction period.

The column-shaped pier 11 is preferably installed on a footing 17 provided on a pile 16 after driving the pile 16. The ramen structure 13 can be made of, for example, reinforced concrete.

Next, as shown in FIG. 1B, a brace material 14 and an energy absorbing damper 1
5 is attached to construct a viaduct substructure 10 (step 102).

The brace member 14 is arranged as an inverted V-shaped brace member in an in-plane space including the columnar piers 11 and 11 and the beam 12, and the center of the beam 12 is near an apex thereof through an energy absorbing damper 15. Both ends are joined near the middle height position of the pair of columnar piers 11, respectively. Such a brace material 14
Can be formed, for example, from a steel structure.

The energy absorbing damper 15 can be formed by forming a large number of slits in a normal thin steel plate, or can be formed of extremely mild steel. The energy absorbing damper 15 is preferably detachably mounted between the brace member 14 and the beam 12 so that it can be replaced during maintenance.

After the viaduct lower structure 10 has been constructed, as shown in FIG. 3, an upper structure 5 composed of a bridge girder, a floor slab, and the like is laid over the bridge structure in the direction of the bridge axis. Laying the track 6, which is the transportation base (Step 10)
3).

Next, the track 2 is removed, and the transport base serving as a business route is switched to the track 6 (step 10).
4). The site after removing the track 2 can be diverted to, for example, a parking lot.

As described above, according to the method for elevating the existing transport base according to the present embodiment, the pair of columnar piers 11,
A predetermined brace material 14 is provided in the in-plane space including the beam 11 and the beam 12.
The rigidity in the horizontal direction perpendicular to the bridge axis is secured by the brace material, so that the deformation of the ramen structure when a horizontal force acts in the direction is sufficiently suppressed without installing a foundation beam. You.

Therefore, conventionally, in order to construct a foundation beam, a site is secured on the side of the viaduct, and a track 3 which is a transport base for temporary use is laid on the site to replace the track. In addition to the problem of land acquisition costs, it was extremely difficult to construct viaducts in densely populated areas where private houses were approaching, but according to this embodiment, Since it can be constructed, it is not necessary to temporarily relocate the track 2 which is the existing transportation base to another place, and it is not necessary to acquire land on the side of the viaduct.

Therefore, it becomes possible to construct a viaduct with a much shorter construction period and at a lower cost than before, and it is possible to construct a viaduct even in a densely populated area where private houses approach the side of the viaduct. .

In the present embodiment, the vibrating energy at the time of the earthquake is absorbed by the energy absorbing damper 15 by joining the vicinity of the top of the inverted V-shaped brace material 14 to the beam 12 via the energy absorbing damper 15. The vibration of the viaduct in the direction perpendicular to the bridge axis is quickly converged, but if there is no problem with the earthquake resistance, the energy absorbing damper 15 is omitted and the vicinity of the top of the brace material 14 is directly joined to the beam 12. You may do so.

[0026]

As described above, according to the method for elevating an existing transportation base according to the first aspect of the present invention, the viaduct can be omitted and the viaduct can be constructed. It is no longer necessary to relocate to another location, and land acquisition on the side of the viaduct is not required. Therefore, it becomes possible to construct a viaduct with a much shorter construction period and lower cost than before, and it is also possible to construct a viaduct in a densely populated area where a private house approaches the side of the viaduct.

[0027]

[Brief description of the drawings]

FIG. 1 is a flowchart showing a procedure of an elevated method of an existing transport base according to the present embodiment.

FIG. 2 is a front view showing a series of construction procedures of the embodiment.

FIG. 3 is a front view showing a series of operation procedures of the embodiment.

FIG. 4 is a front view of a viaduct according to the related art as viewed from a bridge axis direction.

FIG. 5 is a construction diagram showing a construction procedure of a viaduct in the related art.

[Explanation of symbols]

 Reference Signs List 1 foundation beam 2 track (existing transport base) 5 superstructure of viaduct 6 track (new transport base) 10 lower structure of viaduct 11 columnar pier 12 beam 13 ramen structure 14 brace material 15 energy absorption damper

Continued on the front page (72) Inventor Kazu Wakui 2-8-38 Hikaricho, Kokubunji-shi, Tokyo Inside the Railway Technical Research Institute (72) Inventor Nobuyuki Matsumoto 2-8-38 Hikaricho, Kokubunji-shi, Tokyo Railway Within the Research Institute of Technology (72) Inventor Masamichi Sogabe 2-8-38 Hikaricho, Kokubunji, Tokyo Metropolitan Institute of Technology (72) Inventor Hiroyuki Arita 2-8-38 Hikaricho, Kokubunji, Tokyo Railway Technical Research Institute

Claims (1)

[Claims] 1. A pillar pier is erected on both sides of an existing transportation base for running means of transportation, and a beam is bridged near its top to form a ramen structure, and a predetermined brace material is provided on the ramen structure. After being attached to form a viaduct lower structure, the upper structure is laid over the lower structure in the bridge axis direction, and then a new transport base is provided on the upper structure, and the transport base of the transportation means is used as the new transport base. A method of elevating the existing transportation base, characterized by switching.