JPH02210108A - Extruding upright elevated construction - Google Patents

Abstract

PURPOSE:To enable work to be economically executed by preparing for the assembling yards of a small scale along a railway extension or a railway, and by executing the work of bridging on a hot line on a roadway. CONSTITUTION:In assembling yards arranged at fixed positions, the elevated bridge upper-section work sets 21 of bridge feet and upper structure which are integrally formed are assembled by block construction. Then, the work of underground beams 6 are previously executed on both horizontal side sections of a roadway, and on the underground beams 6, the elevated bridge upper- section work sets 21 are moved to specified positions in order by extruding construction, and are erected at the specified positions. Accordingly, for example, by every approx. 500-1000m, the assembling yards may be secured, and in an urban area or the like, the work of upright elevated bridges can be executed by hot line work to hardly effect the train service.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to a construction method for constructing a viaduct directly above an existing railway track.

[Conventional technology 1] In recent years, with the concentration of population in metropolitan areas, traffic problems such as closed railroad crossings have become increasingly serious.

On the other hand, because of the soaring land prices, it is difficult to secure land for urban railways, and there is an urgent need for three-dimensional construction.

Various construction methods have been used in the past for elevating railway tracks, but a construction method that can be safely and economically constructed on live lines has not yet been developed.

[Problems to be Solved by the Invention] In view of the above-mentioned circumstances, the present invention provides an extrusion method that can be used to construct a bridge over a live wire on a railway by preparing a small-scale assembly yard along a railway extension or railway. The purpose of this project is to develop and provide a method for constructing a type-overhead viaduct.

[Means for Solving the Problems] The present invention is an extrusion directly overhead elevated construction method for constructing a directly overhead elevated bridge over an existing railway line, and is comprised of the following steps.

■ The required piles will be driven on both sides of the existing track, and underground beams will be laid on top of these piles to serve as guide rails for the viaduct.

■ Assemble the viaduct superstructure at one location.

■ This underground beam will be connected to the above-mentioned viaduct assembly location.

(2) Assembling a set of at least a round structure of the viaduct superstructure on the guide rail using the viaduct assembly apparatus.

(2) The assembled viaduct superstructure set is moved forward to the erection position by sliding and towing the legs on the guide rail underground beam while synchronizing the legs.

■ Connect adjacent sets at the erection position.

In addition, when moving the viaduct superstructure set, attach the I-beam for suspending the messenger wire support hardware of the trolley wire to the set frame above the trolley wire position and parallel to the trolley wire, and also attach the I-beam for supporting the power supply wire from the feeder wire to the set frame. Attach it to the side pillars, lock the supporting hardware equipped with moving rollers to one of these beams, and attach the messenger wire and the power supply wire to the supporting hardware, respectively.While the viaduct superstructure set is being moved, the supporting hardware will roll and the viaduct will move. After the fixing position of the set is determined, the supporting hardware is attached and fixed to the viaduct superstructure set.

[Function] The present invention involves assembling a viaduct superstructure set in which the piers and the superstructure are integrated using the block construction method in an assembly yard set up at a fixed location. have been constructed, and the above-mentioned viaduct superstructure set is sequentially moved to a predetermined position on this underground beam using the extrusion method, and then erected at the predetermined position.

Therefore, it is sufficient to secure an assembly yard every 500 to 1000 meters, for example, and it is possible to construct a viaduct directly above the live line in urban areas, etc., with little effect on train operation.

In addition, handling of overhead wires is a problem when working on live wires, but the work can be carried out smoothly simply by suspending the overhead wires from a support fitting equipped with rollers.

In addition, when a pier structure is used for bridge piers, not only is the shape more variable and aesthetically pleasing, but the span of the pile foundation can be lengthened, and the amount of foundation work can be reduced. Furthermore, since the leg structure is a truss structure, the overall rigidity is high, and the structure is also excellent in stability when completed, making it suitable for extrusion construction. Since it is extruded in units, it can also be applied to S-curve sections.

〔Example〕

FIG. 1 is a perspective view showing the construction procedure of a directly overhead viaduct.

(A) Substructure construction process: The construction frame 2 of the Novath Circulation Pile 4 is connected to the railway track (
(not shown). This construction frame 2 is placed on a temporary guide rail (not shown) that has been temporarily installed next to the track.
is received by a large number of rollers, and a train can freely pass under this construction frame 2.

The reverse circulation pile 4 is a pile that is constructed by sucking out the earth and sand excavated by the rotation of a drill through a drill vibrator, and is most suitable for construction in urban areas and does not require a pile driver. It is also ideal for direct elevated construction methods, and is the construction method that causes the least disruption to train operation.

The piles 4 are constructed one after another while the pedestal 2 is moved forward one after another.

Next, a footing 5 is formed on the pile head of the driven pile 4, and an underground beam 6 connecting the footing 5 is constructed between the piles 4.

(B) Upper assembly process: The upper structure is assembled at one end of the underground beam 6 thus formed.

In the superstructure assembly yard, a superstructure assembly frame 31 is constructed above the underground beam 6, spanning the underground beam, and a superstructure assembly crane 32 is mounted on this superstructure assembly frame 31. The superstructure assembly crane 32 assembles a viaduct superstructure set 21 made of precast concrete members onto an underground beam.

Here, the directly above-assembled viaduct superstructure set 21 has at least 4
Can be assembled with legs so that it can stand on its own. Extrusion steel rods are attached to the legs to slide and extrude the underground beams.

A beam for holding overhead wires can also be installed.

FIG. 2 is a perspective view of an assembly yard for the viaduct superstructure set 21.

(C) Superstructure extrusion construction: Ci3 in FIG. 1 and FIG. 3 show the extrusion process.

Figure 4 shows a state in which the superstructure is successively connected to the right of the construction position.

As seen in FIGS. 1 and 3, the superstructure set 21 of the elevated bridge, which can stand on its own with at least one unit of four legs, is extruded by the superstructure extrusion device 12. In this case, - the legs 22 of the extrusion unit viaduct superstructure set 21 are
3, the PC steel material 11 is inserted and fixed, maintaining accurate mutual spacing and maintaining high rigidity.

Hydraulic jack 2 is installed at the base 23 of the viaduct superstructure set 21.
5. The sliding frame 26 is attached.

A Teflon plate 27 is interposed between the base and the underground beam 6, and the extrusion device 12 pulls the PC steel material 11 for connecting the piers to advance the viaduct superstructure set 21.

The left and right extrusion devices 12 are synchronized.

(DJ Next, I will explain how to rehang the trolley wire.

As extrusion progresses, the trolley wire and its power supply line are suspended. FIG. 5 is a front view of the extrusion viaduct superstructure unit 21, and FIG. 6 is a partial side sectional view showing the trolley wire. FIG. 7 is a partially enlarged view of FIG. 6 for explaining the relationship between the I-beam and the supporting hardware.

Trolley wire support hardware 41 of extruded viaduct superstructure set 21
．． The movable beam 61 is attached to the position where the power supply line 42 is to be attached and the position where the power supply line 43 and the feeder line 45 are to be stretched. A moving roller 6 attached to this moving beam 61
2. Attach overhead line support hardware 41.42 via 63. If the overhead wire support hardware 41, 42 incorporates a triangle as shown in FIG. 7, it will not be difficult to move due to tilting of the support hardware. In addition, the support hardware 41
．． 42 is when the viaduct reaches its designated location.

It is preferable to be able to fix the supporting legs immediately.After the construction of the viaduct is completed, the supporting hardware 51.53
to be fixed.

As the extrusion of the viaduct superstructure set progresses, the existing overhead wires are suspended from the existing live wire support structure to the viaduct superstructure set, so that the live wires can be used during extrusion to avoid any hindrance to train running. (no given).

[Effects of the Invention] Since the present invention allows the assembling of the viaduct at a fixed location, there is no need for site preparation or other difficulties. In addition, the assembled structure is close to a finished product and is transported on railway tracks by sliding it on underground beams, making it easy to construct and safe. , it can be constructed on live lines and does not interfere with the running of trains.

When the V system is used for the viaduct of the present invention, it has excellent structure and scenery, and also has excellent functions as a structure.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the steps of the method of the present invention, Fig. 2 is a perspective view of the assembly device, Fig. 3 is an explanatory diagram of the moving process, Fig. 4 is a side view of the viaduct of the embodiment, and Fig. 5 is a perspective view of the assembly device. An explanatory diagram of live wire construction, Fig. 6 is a side view of the trolley wire, and Fig. 7 is a partially enlarged view of Fig. 6. 2...Pile construction frame 4...Reverse circulation pile 5...Footing 6...Underground beam 11-PCm material 12-1 Extrusion device 21--Elevated bridge superstructure set 31--Frame 32- ...Crane applicant B-Nice Concrete Co., Ltd. Shiraishi Ukei Patent attorney Yoshio Kosugi Diagram

Claims (1)

[Scope of Claims] 1. When constructing a directly overhead viaduct on an existing railway line, the viaduct superstructure is assembled at one position, underground beams are laid on both sides of the existing line from the viaduct assembly position, and the above-mentioned viaduct assembly equipment is used to construct the viaduct. , assemble at least one set of four legs of the viaduct that can stand on its own on the underground beam, and then slide and tow the assembled viaduct set on the underground beam while synchronizing each leg to the erection position. An extrusion directly overhead elevated construction method characterized by constructing a directly overhead viaduct by moving it forward and connecting it with an adjacent set at the construction position. 2. The extrusion directly overhead elevated construction method according to claim 1, characterized in that a viaduct whose legs are V-shaped legs is constructed. 3. When moving the viaduct set, attach the I-beam for suspending the messenger wire support hardware of the trolley wire to the set frame above the trolley wire position parallel to the trolley wire, and attach the I-beam for supporting the power supply wire from the feeder wire to the set frame side column. A supporting hardware equipped with rollers is fixed to the I-beam, and a messenger wire and a power supply wire are respectively attached to the supporting hardware, and while the viaduct set is moving, the supporting hardware rolls and locks with the I-beam via the rollers. 2. The extrusion directly overhead elevated construction method according to claim 1, wherein the supporting hardware is attached and fixed to the viaduct after the fixing position of the viaduct is determined.