JPS649406B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of constructing elevated structures, such as highways supported by girders.

As is well known, this construction method is known as the Davey-Dark construction method, and uses a moving device called a wagen, which supports the scaffolding and formwork in a suspended state, pours concrete, and allows the concrete to harden. Later, the wagon was moved onto the solidified concrete, and concrete was poured in the same manner to construct the elevated structure. Although this construction method itself can effectively construct an elevated structure, if the wagon is made into a rigid structure to support a large load, it may move in a straight line, but if it moves in a curved manner, for example. This is extremely inconvenient when constructing an elevated road, and also has the disadvantage that when the width of the vehicle is widened in the direction perpendicular to the direction of movement of the wagon, such as at an interchange, it is not possible to work in the widened lateral direction. It was hot.

Therefore, an object of the present invention is to provide a construction method that can easily construct an elevated structure using a wagon that is curved or has different lengths in the width direction.

According to the present invention, the wagon has a stand that receives the load and a main truss that supports the load are constructed separately, each main truss is a planar frame, and the main truss is movable with respect to the stand. The main truss can be moved angularly with respect to the moving direction of the frame.

Embodiments of the present invention will be described below with reference to the drawings.

In Figures 1 to 4, S indicates an elevated structure to be constructed, and this structure S is constructed sequentially to the right in Figures 1 and 2, and the entire work is carried out by W. This is carried out using a wagon shown in . This Volkswagen W has a pedestal 4 as a whole, and a first beam 2 supported on a main truss 1, which will be described later, above the pedestal 4.
A main truss 1 is provided in front of the first beam 2 (in the direction in which the structure is constructed), and is described below.
The main truss 1 is provided in the lateral direction of the frame 4 (perpendicular to the direction in which the structure is constructed).

As shown in FIG. 1, the main truss 1 is composed of a planar (no width) framework, and is equipped with wheels 6 so that it can move on a single rail 5 installed on the top surface of the structure S. The rear end can be fixed with a known clamping device 7 including a jacking device. In front of the main truss 1, work equipment 8 such as formwork and scaffolding for pouring concrete is suspended. The pedestal 4 is constituted by a three-dimensional (width) framework, and wheels 10 are attached so that it can move on a pair of rails 9, 9 laid on the top surface of the structure S. During work, the upper surface 1a of the main truss 1 and the upper surface 4a of the pedestal are at approximately the same height (the pedestal 4 is slightly lower). Each main truss 1 supports on its upper surface 1a a first beam 2 and a second beam 3, which beams 2, 3 extend laterally of the structure S. and beam 2, 3
Another working device 11 is supported by a support member 12 extending downward from the lateral ends 2a, 3a of the structure S along the side surface thereof.

In the illustrated embodiment, two sets of frames 4 and four sets of main trusses 1 are used; however, in carrying out the present invention, this number is determined by the width of the structure, and at least one set of main trusses 1 is used. The present invention can be carried out by using one frame 4 and two sets of main trusses 1.

Next, embodiments of the present invention will be described mainly with reference to FIGS. 2, 5, and 6.

Now, as shown in Figure 2, the front part S ₁ of the structure S
It is assumed that the concrete pouring work has been completed and the concrete has hardened. Thereafter, the pedestal 4 is moved forward to a position where both the first and second beams 2 and 3 can be supported.

Therefore, at this time, the working device 11 suspended from the beams 2 and 3 is supported by the pedestal 4. Then, the oil jack of the clamp device 7 is activated to release the fixation from the structure S, and the main truss 1 is slid forward in a known manner. FIG. 5 shows the state where one main truss 1 (upper side in the drawing) is slid. Therefore, since the main truss 1 receives a load of only its own weight and the weight of the working device 8, the main truss can be easily moved. Furthermore, even when it is desired to change the width of the structure by changing the direction in which the rails 5 are laid, it is only necessary to slightly change the direction of movement of the main truss, which is extremely suitable.

Once each main truss 1 has been moved to a predetermined position, the frame 4 is moved to move the beams 2 and 3, and the main truss 1 and beams 2 and 3 are fixed at the predetermined positions as shown in FIG. good. Of course, the main truss 1 is fixed to the structure S by the clamp device 7 in the advanced position.

In this way, the next part _S2 is constructed and the structure is extended in the same way.

As described above, in the present invention, the main truss 1, the beams 2, 3, and the pedestal 4 are configured as separate bodies, and since the main truss 1 is a planar framework, the load of the beams 2, 3 is absorbed when the wagon is moved. Only the main truss 1 can be moved by being supported by the frame 4. Therefore, by changing the direction in which the rails 5 are laid, the structure S can be curved, or when changing the width, the movement direction or work range can be freely changed. It can be changed. The lengths of the first and second beams 2 and 3 may be replaced or added as appropriate depending on the length in the width direction. Further, the number of frames and main trusses can be increased or decreased as appropriate depending on the width of the structure. Since the main truss 1 is a planar framework, the main truss 1 can change its direction relatively freely while being held appropriately during movement, and is therefore particularly suitable for constructing expressways and the like.

[Brief explanation of drawings]

FIG. 1 is a side view of a wagon implementing the present invention;
Figure 2 is a plan view of the Volkswagen, the lower half of which is omitted because it is symmetrical to the upper half of the figure, Figure 3 is a sectional view taken along line A-A in Figure 1, and Figure 4 is FIG. 5 is a sectional view taken along line B--B in FIG. 1, FIG. 5 is a plan view showing the place where the wagon is being moved, and FIG. 6 is a plan view showing the place where the movement is completed. 1... Main truss, 2... First beam, 3
... Second beam, 4 ... Frame, 5 ... Main truss rail, 7 ... Clamp device, S ... Elevated structure, S ₁ , S ₂ ... Part to be constructed.

[Claims]

1. Rails for supporting and moving formwork equipment are erected across the width of the viaduct and in the longitudinal direction of the viaduct on the outside of the piers via brackets attached to the piers, and the rails run on the longitudinal rails on the width rails. Slab concrete is placed by placing a slab formwork device equipped with a movable caster that can run on a width direction rail and a lifting caster that can run on widthwise rails and has a lifting device.After the concrete has hardened, After demolding the formwork device, it is moved onto the longitudinal rail, and is moved to the next pier by running on the longitudinal rail using a longitudinal moving pedestal, and then moved to the next pier using the elevating pedestal. A method for moving elevated bridge slab formwork, which is characterized by moving the formwork along the widthwise rail between the piers to be constructed next, and fixing the formwork device so that slab concrete can be poured.