JPS63125712A - Wagen removal method in expelling construction method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a method for removing a wagon in an extrusion construction method, in which the wagon is removed to the main bridge tower while avoiding diagonal members at the site where bridge girder construction is completed, without dismantling the wagon. It is something.

[Problem that the invention seeks to solve]

In the method of constructing a cable-stayed bridge using the cantilever type extrusion construction method, in which bridge girders are successively extruded from both sides of the main bridge tower, the construction work vehicle that performs the construction work, that is, the wagon, is usually used for diagonal members. All of the bridge girders are dismantled and removed at the site where construction has been completed, but with this removal method, there is a risk that two of the components will fall during the dismantling work of the Volkswagen, and if there is a road or railway running below the bridge, etc. need to take some safety measures.

This invention was made for the purpose of safely removing the wagon without incurring any danger in the method of constructing cable-stayed bridges using this protruding construction method. This is achieved by avoiding the diagonal members and retracting them.

[Means for solving problems]

In the present invention, by removing both ends of the construction beam that constitutes the wagon, which is constructed in the width direction of the bridge girder, collision between the wagon and diagonal members can be avoided, and the wagon can be removed without dismantling it.

At least the overhanging parts located on both sides of the diagonal members are removed from the construction beam, and the wagon is divided into the wagon main body on the bridge girder and the hanging pillar for suspending the scaffolding.

When the wagon retreats, a temporary rail is laid on the bridge girder on the outside of the diagonal member side, and a support member is protruded from inside the hanging pillar and has wheels that run on the temporary rail.

Then, while the hanging pillars are supported by supporting members and run on temporary rails, they are retreated together with the main body of the wagon to the main tower of the bridge.

〔Example〕

The present invention will be explained below based on the drawings showing one embodiment.

This invention was developed until after the construction of a cable-stayed bridge using the protruding construction method as shown in Fig. 1 is completed, the main tower is installed without dismantling the Wagen W located at the end of the bridge girder a as shown in Fig. 2. This is a method of retreating while avoiding the diagonal member C.

As shown in Fig. 3, the Volkswagen W is composed of a Volkswagen main body 1 with a three-dimensional truss structure that rests on a bridge girder a, and hanging pillars 2, 2 on both outsides of the bridge girder A from which scaffolding 3 is suspended.
, 2 are connected at the construction beam 1a installed in the width direction of the bridge girder 8 as shown in FIG.

A moving rail IC and wheels 1d are attached to the bottom of the pillar lb of the main body 1 of the wagon, and the main body 1 of the main vehicle 1 can be moved in its length direction on the bridge girder a by means of the moving rail IC and the wheels 1d. .

Next, a working method when reversing the Volkswagen W will be explained with reference to FIGS. 4 and 5.

First, as shown in FIG. 4, temporary rails 4, 4 are laid in the length direction of the bridge girder a on both outsides of the diagonal members C stretched at both ends of the bridge girder 8 in the width direction.

In parallel with this laying work or after laying, the supporting member 5 having wheels 5a that can run on the temporary rail 4 is attached to the hanging pillar 2.2.
The suspension pillars 2, 2 and the scaffolding 3 are supported by this.

Subsequently, as shown in FIG. 5, at least the portion of the construction beam 1a that intersects with the diagonal member C is removed to enable the wagon W to retreat. In the embodiment, part of the hanging columns 2, 2 is also removed along with the construction beam 1a.

In Figure 4, the left side of the center line is the cross section taken along the line X-X in Figure 3;
The right side shows a cross section taken along the line YY, and as shown in the cross section taken along the YY line, the hanging pillar 2 disposed on the front of the Volkswagen W is also removed.

Then, in the state shown in FIG. 5, the wagon main body 1 and the hanging pillars 2.2 are individually retreated to the main tower.

The backward movement of the main body 1 of the Volkswagen is carried out by the reverse operation of the forward movement.
Further, the hanging pillars 2, 2 are moved back by a drive device or the like in the same way as the wagon main body 1 is moved back.

The main body 1 of the wagon and the hanging pillars 2, 2 are both divided and dismantled at the main tower and removed.

〔Effect of the invention〕

This invention is as described above, and it is possible to divide the Volkswagen into the main body and the hanging pillar without disassembling it at the construction site, and to retreat each part to the main tower, so that there is no risk to the lower part of the bridge girder. You can safely dismantle and remove the Volkswagen.

[Brief explanation of the drawing]

Figure 1 is an elevation view showing the construction state of the cable-stayed bridge, Figure 2 is its enlarged view, Figure 3 is a side view showing the wagon at the end of the bridge girder, Figure 4 is its front view, and Figure 5 is The figure is a front view showing the state of the Volkswagen when it is reversing. A---One cable-stayed bridge, a---One bridge girder, b
--------・-Main tower, c---------- diagonal timber, w
----------Wagen, 1---Wagen body, l
a--------1 erection beam, 1 b-----1 pillar, LC-1/transfer rail, 1 d-----1 wheel, 2.--11- --Hanging pillar, 3...Scaffolding, 4.--Temporary rail, 5--Supporting member, 5a--Wheel.

Claims (1)

[Claims] (1) In the extrusion construction method in which a cable-stayed bridge is constructed using a three-dimensional truss structure that is installed on the bridge girders that have already been constructed and is movable in the length direction, the bridge girder is suspended after the construction of all the bridge girders is completed. Temporary rails are laid on the bridge girders on the outside of both sides of the bridge, and supporting members with wheels that run on these temporary rails are protruded from the inside of the hanging pillars, so that both ends of the construction beams of the wagon that will be erected in the width direction of the bridge girder are installed. At least the overhanging parts located on both outside sides of the diagonal members are removed and the wagon is divided into the wagon main body and the hanging pillar from which the scaffolding is suspended, and with the hanging pillar supported by the support members, each part is individually extended to the main tower of the bridge together with the wagon main body. A method for scattering the wargen in the protruding construction method, which is characterized by retreating.