JPS6370772A - Movable type mold frame construction method of plural high bridge slabs arranged in parallel - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for constructing movable formwork for elevated slabs for railways, passageways, etc.

(Conventional technology) Construction of concrete viaducts, etc. involves constructing structures of almost the same shape continuously, so in order to save labor and improve efficiency of construction, mobile molding is used to construct the formwork. Construction methods using frames have come to be adopted.

There are two ways to move the formwork: a hanging type using a crane and a traveling type. Conventionally, when using the hanging type, a large lane such as a gate crane was used, and the frame was moved using a crane. Not only would the crane be large-scale, but a large dedicated site would be required to install and move the crane, and the cost would be enormous. Furthermore, in mountainous areas, large cranes must be installed in extremely rotating locations, making it impossible to use movable formwork.

In view of this situation, the present inventor has endeavored to realize formwork construction using a traveling and moving method, and has so far made many proposals and put them into practical use. For example, patent application No. 61-2549
As in No. 5, small formwork devices formed in several width divisions in the width direction of the viaduct slab are installed in parallel to cover the formwork that is erected between the piers of the viaduct slab, and the formwork is moved by the traveling method of the formwork. Completed the construction method.

(The problem that the invention seeks to solve) However. The above-mentioned mobile formwork construction method is intended for the construction of elevated bridge slabs, so even if eight bridge slabs are arranged in double rows, such as in a general field road, only one elevated bridge After constructing one slab, the other viaduct slab will be constructed by turning it back, but moving the formwork equipment in the length direction of the viaduct slab (vertical movement) is not possible even if it is a traveling movement. Since this requires a considerable amount of work, it has been desired to further improve processing efficiency and performance.

The present invention was made in order to solve the technical problems of the above-mentioned method of constructing double-row viaduct slabs with corner-contacting corners. After construction, the double-row viaduct slabs can be moved between adjacent piers (WL) to continue construction between each pier, reducing the work of vertical movement of formwork equipment by more than half, and improving construction efficiency. The aim is to provide a formwork construction method that can greatly increase the height of bamboo.

(Means for Solving the Problems) The structure of the present invention is explained with reference to the drawings corresponding to the actual division examples. Piers 1a arranged in each row with
1b, formwork lateral movement rails 4, 4 formed long along the width direction of the viaduct slabs 2a, 2b are connected from the pier 1a of one viaduct slab 2a to the pier 1b of the adjacent viaduct slab 2b.
On the other hand, the elevated bridge slab 2a
, 2b width is divided into several divisions [1], forming a formwork device 5,
A plurality of the devices 5 are placed on the formwork lateral movement rails 4, 4 installed between the piers 1a and ia of the one elevated bridge slab 2a,
Pedestal i1. Parallel and erect at a predetermined position via ii,
After pouring slab concrete onto the formwork bodies 8 and 10 and hardening the concrete, the formwork bodies 8 of the formwork apparatuses 5 and 5
．． 10 is lowered to peel off from the concrete, and then,
With the formwork device 5.5 mounted, the formwork lateral movement rail 4,
4 between the piers 1b and 1b of the adjacent elevated bridge slab 2b, and set the formwork bodies 5, 5 in the predetermined positions, pour slab concrete and peel off the formwork body 8.10 in the same manner as above. Then, each formwork device 5.5 is connected together and the connected formwork device 5.5 is placed on the pedestal 1.
Instead of 1.11, support via several ψ wheels 7.7, move the connected formwork @5, 5 to the end of the formwork lateral movement rails 4, 4, and position it at the end. This method is characterized in that the formwork device 5 is uncoupled and separated, and then lifted out of the piers 1b, Ib by a crane or the like.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In the figure, 1a and 'lb are the piers installed in a row at approximately equal intervals in the length direction of two elevated bridge slabs 2a and 2b that are constructed in parallel, and the piers 1a and 1b of both slabs 2a and 2b are almost the same. They are arranged in parallel on a line. The construction of both viaduct slabs 2a and 2b is carried out using the sections between the piers 1a and Ia and between the piers 1b and Ib, which are arranged in a row, as unit sections of construction.

When looking at the cross section of these viaduct slabs 2a and 2b,
Generally, there is a central portion a on piers 1a and Ib, and piers 1a on both sides thereof.

The portions s and b that protrude outward from p 1b are continuous (see Figures 1 and 4). The embodiments of the present invention will be explained by taking the construction of such a viaduct slab as an example, but the present invention is also applicable to the construction of a viaduct slab that does not have the above-mentioned overhanging portions (b).

A roller 13 for rail sliding is provided on the upper part of each of the opposing surfaces of the piers 1a, 1a and Ib, 1b arranged in a row, respectively.
A plurality of brackets 3.3 each having a height-adjustable lifting jack 14 are attached to the upper and lower surfaces of the roller 13, and on top of the brackets 3.3, the side of a formwork formed sufficiently longer than the width of the viaduct slab 2a or 2b is attached. The moving rail 4 is installed on the brackets 3, 3 of the piers 1a, 1a of one of the viaducts, higher than the upper surface of the rollers 13, via the ridge seats 15 (
(See Figure 1). In addition, as a means to erect and cover this rail 4, instead of using the bracket 3.3 as described above, a support T may be constructed from the ground and the rail 4 may be erected on it, and the rail 4 may be constructed from the ground to the rail 4. If the height is low, it may be economically advantageous. In addition, the formwork lateral movement rail 4 may be made of I-beam steel itself as shown in the figure.
Alternatively, a separate rail may be laid on top of the section steel.

Further, the elevating jack 14 may be placed in place during use, which will be described later.

5.5... is a traveling formwork device in which a rack 1 is mounted between formwork lateral movement rails 4, 4 installed opposite to each other, each of which is formed in the same way, and has a rectangular cross section. Wheels 7, 7, which can run while engaging with the formwork lateral movement rails 4, are removably installed on the lower surface of both ends of the pedestal 6, and the upper surface of the pedestal 6 is made of butter material. The formwork body 8 to which the weir roots are attached is freely mounted on the frame 6 by means of adjustment bolts 9, 9, which are provided for vertical movement adjustment, and the width of the device 5 is the same as that of the viaduct slabs 2a, 2b. The width is divided into several parts.

Therefore, the art shop bridge slabs 2a and 2b were constructed using the formwork device 5.5 described above between the piers 1a, 1a, Ib, and Ib in each row, and after constructing one of the viaduct slabs 2a, the adjacent Construct the other viaduct slab 2b, which is
This is carried out between each pier in the row.

First, as shown in Fig. 1, the formwork urff5,5... is mounted on the formwork lateral movement rails 4,4 installed on the piers ia, 1a of one of the viaduct slabs 2a to be constructed, and its wheels 7.7
They are mounted on the rails, run on rails 4.4, and placed in parallel at predetermined positions under one of the viaduct slabs 2a. Next, as shown in FIG. 2, a jack (not shown) is inserted between the pedestal 6 and the rail 4, and by operating the jack, the wheel 7.7 is replaced with the pedestal 11.11, and the device 5 is moved to the rail 4. Support the formwork above and set the formwork body to a predetermined height position by operating the adjustment pole (・9°9).

Note that the rail 4 can be mounted via the pedestal 11 without using the wheels 7.
, 4, the formwork devices 5, 5 can also be placed in a predetermined position by a crane. Further, an overhanging formwork 10 is mounted on the traveling formwork device 5 below the overhanging part so as to extend along the lower surface of the overhanging part.

Then, the reinforcing bars of the viaduct slab 2a are assembled on top of these formwork bodies 8.8.10.10, and concrete is poured. After the concrete has hardened, as shown in FIG. 3, the formwork bodies 8, 10 are peeled off and lowered from the concrete by operating the adjustment bolts 9.9, and the overhanging formwork 10 is removed.

Next, the jacks 14 provided on the brackets 3, 3.
14 is once raised to remove the catch 15.15, and the jack 14.14 is lowered to place the formwork lateral movement rail 4.4 on the roller 13.13. And each formwork device 5.
5 remains installed, slide the formwork lateral movement rails 4, 4 on the rollers 13.13, and move the adjacent leg 411 as shown in FIG.
b, roller 13.1 of bracket 3, 3 attached to 1b
3 and transferred to the construction position of the other viaduct slab 2b.

After this transfer, as in the case of II of the viaduct slab 2a above, operate the lifting jacks 14 and 14 to support the formwork lateral movement rails 4, 4 via the support Fi: 15° 15, The overhanging formwork 10.10 is erected, the formwork body 8 is set, and concrete is poured using the reinforcing bars of the viaduct slab 2b, and after it hardens, the formwork body 8.10 is peeled off from the concrete, and then the formwork body 8 is set. and remove the overhang formwork 10. Subsequently, after each formwork device 5.5 is integrally connected by the tying device 12.12, as shown in FIG. 6, a jack (not shown) is again installed between the frame 6 and the rail 4. By this operation, the pedestal 11.11 is removed, several wheels 7, 7 are attached to appropriate locations on the pedestal 6.6, and the connected formwork devices 5.5 are moved through the wheels 7.7. After completing the movement and preparation for carrying out each formwork device 5, 5 that has been supported on the rail 4 and completed construction, the connected formwork device 5, 5 is pushed forward and the formwork device 5 at the end thereof is moved. It is located at the end of the rail 4. Therefore, the formwork device 5 at the end is suspended by a crane (not shown), and the fasteners 12 connecting it to the formwork device @5 next to it are removed and separated, as shown in Fig. 7. Then, a crane (not shown) was used to lift it out from between the piers. After this lifting,
If necessary, change the mounting location of the wheels 7 and push the connected formwork devices 5, 5 again to position the device 5 at the end on the end of the rail 4, and then repeat the same operation. Repeat this until all formwork equipment has been lifted.

The suspended formwork device 5.5 is placed on the rail 4.4 between the piers to be constructed next, and construction of the viaduct slabs 2a, 2b is performed. Viaduct slabs 2a paralleled in this way
, 2b is II for each row of piers 1a, 1a, 1b, 1b.
The construction is continued repeatedly.

(Effects of the Invention) As explained above, according to the construction method of the present invention, the formwork used for constructing slab concrete between each pier is a small traveling formwork device, so it can be easily moved by traveling or using a crane. The work can be done safely and efficiently, and only a small crane is needed, and the formwork equipment uses wheels only when moving the formwork on the rails for lateral movement of the formwork, and the pedestal is not used when pouring concrete. Since the wheels are supported through the formwork, the wheels can be of a size that can withstand the vJ weight when the formwork equipment is moved, so it can be made simple and inexpensive, and wheel costs can be reduced. It will be possible. Also, in particular, each formwork device has an average +lJ? After constructing one of the viaduct slabs, instead of moving vertically to the next pier as in the conventional method, the slab is moved horizontally to the other adjacent viaduct slab while remaining on the rail. After the slabs are constructed, they are lifted individually from the end of the rail and II is carried out between the next piers, which makes it possible to halve the complicated work of moving the formwork equipment vertically between the piers. Furthermore, the formwork equipment can be easily moved laterally from one pier to the next without having to move the formwork equipment individually, making construction more efficient and economical. It is effective.

[Brief explanation of the drawing]

The drawings schematically show one embodiment of the construction method of the present invention, and Fig. 1 is a front sectional view without showing the state in which a formwork lateral movement rail is installed between one pier and the formwork equipment is carried in parallel. The figure is a front sectional view showing the viaduct slab with formwork set in place, Figure 3 is a front sectional view showing the formwork removed, and Figure 4 is a front sectional view showing the formwork installed. Front sectional view showing the movement state of the formwork lateral movement rail, No. 5
The figure is a front cross-sectional view showing the formwork set after moving the formwork device between adjacent piers, and Figure 6 shows the formwork being removed and the formwork device being supported by wheels instead of a pedestal, and the rail A front sectional view showing the area moved to the end, Figure 7 shows the formwork 2a, 2b at the end... elevated slab

Claims (1)

[Claims] A formwork lateral movement rail formed long along the width direction of the viaduct slabs is installed on each pier arranged at a predetermined interval in the length direction of the parallel viaduct slabs. A formwork device is movably installed across the piers of the viaduct slab, and has a width divided by several parts of the width of the viaduct slab. The slabs are installed in parallel at predetermined positions on the lateral movement rails via pedestals, slab concrete is poured onto these formwork bodies, and after the concrete has hardened, the formwork body of the formwork device is lowered. Peeling off from concrete,
Next, with the formwork device mounted, the formwork lateral movement rail is moved between the piers of the adjacent viaduct slab, the formwork body is set in a predetermined position, and the slab concrete is poured and molded in the same manner as described above. The frame bodies are separated, and then each formwork device is integrally connected, and the connected formwork device is supported via several wheels instead of the pedestal, and the connected formwork is A plurality of parallel elevated bridges, characterized in that the equipment is moved to the end of the formwork lateral movement rail, the formwork equipment located at that end is uncoupled and separated, and then lifted out of the bridge piers by a crane, etc. Mobile formwork construction method for slabs.