JP2000230204A - Elevated track construction method and equipment - Google Patents

Abstract

(57) [Summary] [Problem] To efficiently construct an elevated track such as a new transportation system. SOLUTION: When an elevated track 1 is constructed, a new pillar 2 is erected in front of the constructed existing track and a new girder 3 is erected between the pillar and the existing track to move the track forward. To be extended. A unit 4 in which the column member 2a and the girder member 3a are connected to each other by a pin 7 so as to be rotatable relative to each other is manufactured, the unit is loaded on a construction device 5 running on an existing track, and is transported to the tip of the existing track. The unit will be installed in front of the existing track from above the tip. The base end of the girder is turnably connected to the tip of the existing track, and the unit is turned forward using this as a fulcrum. The construction apparatus mounts a lifting equipment 13 that holds the unit and turns it forward on a trolley 12 on which the units are loaded and travels on an existing track. The truck is constituted by a front truck 12a and a rear truck 12b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction method and a construction apparatus suitable for use when constructing an elevated track in a new transportation system, for example.

[0002]

2. Description of the Related Art In recent years, intense traffic congestion has become chronic on roads in urban areas. For the purpose of alleviating or eliminating such traffic congestion, small vehicles with a capacity of about 10 people are guided by guide rails and fully automatically driven. The relatively simple public transportation system, so-called new transportation system, is being planned in various places.

[0003]

When planning a new transportation system, it is often difficult to secure a new site for laying the guide rail, which is the track of the new transportation system. It is common to utilize an upper space, for example, a space above a median strip, and to provide an elevated track there. However, in order to construct an elevated track on an existing road, work with a crane from the road is the center, so it is essential to regulate road traffic, and it is not sufficient for arterial roads in large cities. In many cases, it is difficult to regulate traffic. Therefore, it was urgently necessary to develop an effective measure for constructing an elevated track with as little traffic regulation as possible.

[0004]

SUMMARY OF THE INVENTION In view of the above circumstances, the construction method according to the first aspect of the present invention is to construct an elevated track in which columns are erected at predetermined intervals and a girder is erected between the upper ends of the columns. Erecting an elevated track to be constructed sequentially by erecting a new pillar in front of the installed existing track and installing a new girder between the pillar and the existing track. When erecting a new pillar and erection of a new girder, a unit was manufactured by connecting the upper end of the pillar material and the tip of the girder material so as to be relatively rotatable with a pin, and the unit was mounted on the existing track. And transported to the tip of the existing track, transporting it to the tip of the existing track, installing the unit in front of the existing track from the tip of the existing track, and standing up the pillar as a new pillar and The girder material is erected as a new girder between the existing track. It is obtained by way.

According to a second aspect of the present invention, there is provided the construction method according to the first aspect of the present invention, wherein the base end of the girder of the unit is directed forward and the column is attached above the girder. The unit is placed horizontally on the construction device and loaded, and when installing the unit in front of the existing track, the base end of the girder is connected to the tip of the existing track so as to be able to turn,
By turning the unit forward with the connection point as a fulcrum, the girder is positioned in front of the existing track with a substantially horizontal posture, and the column is rotated relative to the girder with the pin as a fulcrum. In a vertical position.

A construction apparatus according to a third aspect of the present invention is used when performing the construction method according to the second aspect of the invention.
On a truck carrying the unit and traveling on the existing track,
A hoisting device for holding the unit and turning the unit forward is mounted.

According to a fourth aspect of the present invention, in the construction apparatus according to the third aspect, the bogie includes a front bogie for holding a base end of a girder in the unit, and a front bogie for holding a front end of the girder. And a rear bogie on which the lifting equipment is mounted.

[0008]

1 to 3 show an embodiment of the present invention. The elevated track 1 to be constructed according to the present embodiment serves as a guide rail of a new transportation system, and includes columns 2 erected at regular intervals and a girder 3 erected between upper ends of the columns 2. , And the vehicle travels on the girder 3 itself as a guide rail.

The construction method according to the present embodiment is characterized in that a new pillar 2 is erected in front of the constructed existing track and a new girder 3 is erected between the pillar 2 and the existing track. Is basically extended forward. Then, in erection of a new pillar 2 and erection of a new girder 3 in front of the existing track, a unit 4 in which a pillar 2a to be a pillar 2 and a girder 3a to be a girder 3 are used, The unit 4 is loaded on a construction device 5 running on an existing track, transported to the tip of the existing track, and installed by work from the existing track.

In the unit 4, the upper end of the pillar 2a and the tip of the beam 3a are connected to each other via a bracket 6 via a pin 7 so as to be relatively rotatable. This unit 4 is shown in FIG. The beam 3a is temporarily fixed by the fixing hardware 8 in a state where the base end side of the beam 3a is directed forward and the column 2a is attached above the beam 3a. Things. In this unit 4, a bracket 9 is attached to the base end of the girder member 3a. As will be described later, the bracket 9 is superimposed on a similar bracket 10 attached to the tip of an existing track, and a pin 11
(See FIGS. 2 and 3), the unit 4 is connected to the existing track so as to be able to turn forward with the pin 11 as a center. The dimensions of the unit 4 are naturally determined according to the dimensions of the columns 2 and the beams 3 of the elevated track 1 to be constructed, but the length of the column 2a is about 5 to 8 m, and the length of the girder 3a is 10 to 15 m. It is practical that the weight is less than about 5t.

The construction apparatus 5 is provided with a lifting machine 13 for holding the unit 4 and turning the unit 4 forward on a carriage 12 which runs on an existing track. The trolley 12 in the construction apparatus 5 of this example is
Front bogie 12 holding the base end of beam 3a of unit 4
a and the leading end of the girder 3a and the lifting equipment 1
3 is connected to a rear bogie 12b on which rods 3 are mounted by rods 14. Front trolley 1
2a is configured to be detachable from the rear bogie 12b and can be removed from the existing track as needed. The lifting equipment 13 has a hydraulic jack 13a for gripping the unit 4 and a hydraulic jack 13b for raising and lowering the hydraulic jack 13a.
The unit 4 can be turned forward by the operation b.

In order to extend the existing track forward by using the unit 4 and the construction apparatus 5, the unit 4 is loaded on the construction apparatus 5 using the previously constructed station building as a work base. It is started and guided to the tip of the existing track as shown in FIG. At this time, since the load of the unit 4 is distributed to the front bogie 12a and the rear bogie 12b,
The entire load of the unit 4 and the construction device 5 does not concentrate on the existing girder 3. The foundation 15 for erecting a new pillar 2 is pre-constructed.

When the construction device 5 reaches the tip of the existing track, the lifting equipment 13 is operated there, and the position of the truck 12 is adjusted back and forth as necessary, and attached to the base end of the girder 3a. The unit 9 is positioned so as to overlap the bracket 9 attached to the tip of the existing track so as to overlap with the bracket 10 attached to the tip of the existing track, and the unit 4 is rotatably connected to the existing track by inserting pins 11 into the brackets 9 and 10. I do. The connecting operation may be performed by the operator from the front carriage 12a or a scaffold installed on the front carriage 12a.

After removing the fixing hardware 8, FIG.
As shown in FIG. 3, the lifting device 13 is operated to turn the unit 4 around the pin 11 as a fulcrum to stand up, and then, as shown in FIG. At this time, if the front carriage 12a is in the way, it may be retracted appropriately. In the illustrated example, the front bogie 12a is separated from the rear bogie 12b and lowered from the existing track. If there is a possibility that the rear truck 12b may fall forward due to the load of the unit 4, the rear truck 12b may be appropriately fixed to the existing track.

By the above operation, as shown in FIG. 3, the column member 2a naturally rotates relative to the girder member 3a with the pin 7 as a fulcrum by its own weight and descends in a vertical posture. When the lower end of 2a reaches the foundation 15, the beam 3a
Automatically becomes a horizontal attitude and continues to the existing track. Thereafter, a new column 2 is erected only by fixing the column member 2a to the foundation 15, and a new column 3 is formed only by connecting both ends of the beam member 3a to the column 2 and the existing track. It will be erected.

According to the above construction method, most of the work related to the erecting of the new pillar 2 and the erection of the new beam 3 can be performed from the existing track, and the transfer of the unit 4 also uses the existing track. Work by the construction apparatus 5 can greatly reduce or almost eliminate the work from the ground using a crane as in the prior art. Therefore, even when the elevated track 1 is provided on a road, traffic regulation is minimized. It is possible to reduce it. Further, since the column member 2a and the beam member 3a are connected in advance to form a unit 4, which is connected to the existing track and turned forward by the lifting equipment 13, work from the ground is performed. In addition to the fact that it is unnecessary, the erecting of the column 2 and the erection of the girder 3 can be performed simultaneously and safely, so that the workability is excellent, and the construction period and the cost can be reduced.

The present invention is optimally applied to a new transportation system in which the structure of the elevated track 1 to be constructed is relatively simple, but is limited to the new transportation system if the elevated track 1 has the same structure. It is possible to apply other without. As the unit 4, for example, a unit 4 for a double track in which two column members 3 a are connected to one column member 2 a by pins 7 as shown in FIG. 4 is also applicable. However, in any case, since the present invention uses the existing track to transport the unit 4 and install it, the total weight of the construction apparatus 5 loaded with the unit 4 does not exceed the design load of the elevated track 1 to be constructed. It should be set within the range, otherwise reinforcement for the existing track is required.

Further, in the present invention, it is reasonable to construct the station building in advance and use it as a work base as in the above embodiment, but the distance between the station buildings exceeds about 1 km and the transport efficiency is not good. In such a case, a temporary work base may be provided between the station buildings to improve the efficiency of material transportation.

Further, the construction of the construction apparatus of the present invention may be appropriately changed according to the size and form of the unit. For example, the construction apparatus may be constituted by the front bogie 12a and the rear bogie 12b as in the above embodiment. However, the lifting equipment 13 is not limited to the hydraulic jacks 13a and 13b, and other types can be used. Also,
When the unit 4 for a double track as shown in FIG. 4 is used, the lifting equipment 13 is made to be capable of operating two girder members 3a, or the construction equipment 5 is provided with two lifting equipment 13 It should be installed. Further, it is preferable that the construction device be self-propelled with a traveling drive source, but may be one that travels by traction or the like.

[0020]

According to the construction method of the first aspect of the present invention, a unit in which a column member and a girder member are connected is loaded on a construction device traveling on an existing track, transported to the tip of the existing track, and the unit is transferred from there. Since it is installed in front of the existing track, most of the work related to erecting new columns and erection of new beams can be performed from the existing track, and units are also transported using the existing track. Therefore, it is possible to greatly reduce or almost eliminate the work from the ground using a crane as in the past, and therefore it is possible to minimize traffic regulations even when an elevated track is provided on a road, It is optimal when constructing relatively simple elevated tracks in new transportation systems.

According to the construction method of the second aspect of the present invention, the base end of the girder material is rotatably connected to the tip of the existing track, and the unit is turned forward using the connection point as a fulcrum. Except for the construction work, the erecting of the pillars and the erection of the girder can be performed simultaneously and safely only by working from the existing track, so that the workability is excellent, the construction period is shortened, and the construction cost is reduced.

According to the construction apparatus of the third aspect of the present invention, a lifting device for holding the unit and turning it forward is mounted on a bogie on which the unit is loaded and travels on the existing track. Since the unit can be transported and turned forward, it is suitable for use in carrying out the above method. .

In the construction apparatus according to the fourth aspect of the present invention, since the bogie is constituted by the front bogie and the rear bogie, the load during unit transport can be dispersed, and an excessive concentrated load is applied to the existing track. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating an embodiment of the present invention, and is a diagram illustrating a state in which a unit has been transported to a tip end of an existing track.

FIG. 2 is a diagram showing a state in which the unit is turned upright by standing forward.

FIG. 3 is a diagram showing a state in which the unit is further turned forward and installed at a position in front of an existing track.

FIG. 4 is a diagram showing another example of a unit used in the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 elevated track 2 pillar 2a pillar material 3 girder 3a girder material 4 unit 5 construction equipment 7 pin 12 trolley 12a front trolley 12b rear trolley 13 lifting equipment 13a, 13b hydraulic jack

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yoshiyuki Ohara 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation F-term (reference) 2D057 CC02 2D059 AA05 BB37 CC07 DD03 DD04

Claims (4)

[Claims] When constructing an elevated track having pillars erected at predetermined intervals and a girder between the upper ends of the pillars, a new pillar is erected in front of the already-constructed existing track. An elevated track to be constructed is to be extended sequentially by constructing a new girder between the pillar and the existing track, and in erection of a new pillar and construction of a new girder,
Manufacture a unit that connects the upper end of the column material and the tip of the girder material so that they can rotate relative to each other with pins, load the unit on the construction equipment running on the existing track, transport it to the tip of the existing track, and It is required that the unit is installed in front of the existing track from the top of the track and the pillar is erected as a new pillar, and that the beam is erected as a new beam between the pillar and the existing track. Elevated track construction method is a feature. 2. The method for constructing an elevated track according to claim 1, wherein the unit is mounted in a state where a base end side of a girder member in the unit faces forward and the column member is attached above the girder member. When the unit is placed laterally on the construction device and the unit is installed in front of the existing track, the base end of the girder is connected rotatably to the tip of the existing track, and the connection point is used as a fulcrum. By turning the unit forward, the girder is positioned in front of the existing track in a substantially horizontal posture, and the column is relatively rotated with respect to the girder using the pin as a fulcrum, thereby obtaining a vertical posture. An elevated track construction method characterized by the following. 3. A construction apparatus used in the method of constructing an elevated track according to claim 2, wherein the unit is held on a truck carrying the unit and traveling on an existing track, and the unit is turned forward. An elevated track construction device, which is equipped with lifting equipment to be lifted. 4. The construction apparatus according to claim 3, wherein the bogie includes a front bogie for holding a base end of a girder in the unit, and a crane for holding a front end of the girder. An elevated track construction apparatus characterized by comprising a rear bogie on which is mounted.