JPS5953426B2 - Mobile formwork equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention constructs a concrete bridge by sequentially and continuously forming girders while moving formwork.

Conventional mobile formwork equipment of this type involves suspending the formwork bottom plate from supporting beams that can be moved in the longitudinal direction of the bridge, and sliding the formwork bottom plate left and right at the pier position; was complicated.

The present invention was devised to solve these conventional problems, and an object of the present invention is to provide a movable formwork device with an extremely simple device configuration.

The movable formwork device according to the present invention places a formwork bottom plate divided into two in the bridge width direction on a movable support beam that is movable in the bridge longitudinal direction, and moves it appropriately in the bridge longitudinal direction, thereby continuously In order to form the girder and separate the poured concrete and the formwork bottom plate, the movable support beam is lowered by a lifting device, and the formwork bottom plate is divided into two as described above,
The movable support beam supporting each divided section is made movable in the width direction of the bridge by sliding bodies in order to enable the surface divided sections to approach and separate from each other.

Next, an embodiment of a movable formwork apparatus according to the present invention will be described based on the drawings.

In FIG. 8, the movable formwork device 1 has a formwork bottom plate 3 which is divided into two parts in the width direction of the bridge 2 and consists of divided parts 3A and 3B, and each divided part 3A and 3B has a movable supporting beam 4A and 4
Supported by B.

At the bottom of the support beams 4A, 4B, a lifting device 6 consisting of a plurality of jacks 5 and a sliding body 8 consisting of a pair of wheels 7, 7 are provided.
are provided in parallel in the longitudinal direction of the bridge 2, and the lifting device 6 and sliding body 8 extend over the entire width of the support beams 4A and 4B.

Therefore, the support beams 4A, 4B are stably supported on the fixed support 9 by the hoisting device 6 or the sliding body 8.

When moving the movable formwork apparatus 1 forward, rollers 11 (see FIGS. 5 and 6) are introduced below the movable formwork apparatus 1 to give the movable formwork apparatus 1 running properties.

When introducing this roller 11, the supporting beams 4A, 4B and the formwork bottom plate 3 are lifted up by the lifting 6.

On the other hand, the sliding body 8 is supported and guided by rails 12 laid on the fixed support 9 in the width direction of the bridge 2, and slides in the width direction of the bridge 2, and moves the support beams 4A, 4B and the formwork bottom plate 3 to the bridge 2. can be moved in the width direction.

The supporting beams 4A and 4B have built-in screw jacks 13 that can expand and contract in the width direction of the bridge 2, and the advancing/retracting rods 14 of the screw jacks 13 are fixed to the piers 15 at their tips.

Therefore, the advance/retreat rod 1 is moved by the screw jack] 3.
4 moves back and forth, the supporting beams 4A, 4B and the formwork bottom plate 3 move back and forth in the bridge width direction.

Rails 16 extending in the longitudinal direction are laid at the outer ends of the support beams 4A and 4B in the width direction, and a portal crane 17 is placed on the rails 16.16 so as to be able to travel in one direction along the bridge length. has been done.

This portal crane 17 is effective for working on the mobile formwork apparatus 1.

When molding the girder 10, a cavity H is formed in the girder 10 to reduce the weight of the girder 10, and this cavity formation is performed by a medium die 18 supported by the formwork bottom plate 3.

The movable formwork device 1 moves in the throwing direction of the bridge 2 and sequentially and continuously forms the girders 10.

The left half of FIG. 8 shows the state in which the girder 10 is being cast using the formwork bottom plate 3. In this state, the supporting beams 4A, 4
Since B and the formwork bottom plate 3 collide with the pier 15, they cannot pass through the pier 15.

Therefore, the movable formwork device 1 moves the divided portion 3A and shoring 4A and the divided portion 3B and shoring 4B toward and away from each other, and at the position of the pier 15, as shown in the right half of FIG. Split parts 3A, 3B, supporting beams 4A, 4B are connected to piers 15
detour to both sides.

Although the formwork bottom plate 3 is omitted in FIGS. 1, 3, 5, and 7, as is clear in these drawings, the shoring structures 4A and 4B are connected to the inner girder 19, the center Guarda 2
The inner girder 19 is formed to be slightly shorter than the span of the piers 15, is inserted between the piers 15, and can support a sufficiently inner part of the formwork bottom plate 3.

In addition, the outer girder 21 is formed so that its rear end reaches the center in the longitudinal direction of the girder 10 that has already been cast when the inner girder 19 is inserted between the piers 15. We can guide you up to.

The tip of the outer girder 21 is parallel to the tip of the inner girder 19.

The rear end of the central girder 20 is parallel to the rear end of the outer girder 21, and its tip protrudes forward from the tip of the inner girder 19, reinforcing the outer girder 21 and supporting the shoring 4A,
It maintains balance in the front and back direction of 4B.

Next, referring to FIGS. 1 to 7, the girder 10 according to this embodiment will be explained.
The continuous molding process will be explained.

i Casting of the girder 10 (Figures 1 and 2) As shown in the left half of Figure 8, the inner girder 19 is placed between the piers 15 (in Figures 1 and 2, the piers are designated with symbols 15A and 15B). show.

), the formwork bottom plate 3 and the supports 4A, 4B are lifted up by the lifting device 6, and the divided parts 3A, 3
B are connected to each other in a water-tight manner, and the girder 10 is poured.

ii Preparation for advance of mobile formwork device 1 (Figures 3 and 4) After concrete hardening of girder 10, jacking 5 of launching device 6
is shortened, the form bottom plate 3 is removed from the girder 10, and the sliding body 8 is placed on the rail 12.

Here, the supporting beam 4A,
4B are spaced apart from each other, and the inner girder 19 is connected to the piers 15A,
Pull it out from between 15B.

Before the support beams 4A and 4B are separated from each other, the crane 1
7 on the rear girder 10 (in Figures 3 and 4, the rear girder 10
is indicated by reference numeral 10B.

), pass the beam 23 to the crane 17, attach the wheels 24 to the lower side of the beam 23, and move the beam 23 to the crane 17.
A rail 25 is laid on the IOB in its longitudinal direction, and wheels 24 are placed on the rail 25 when the jack 5 is shortened.

As a result, the crane 17 is supported by the girder 10A and can be moved as needed above the girder 10B.

In addition, the movable formwork device 1 supports the girder 10 between the piers 15A and 15B.
A separate formwork (not shown) is molded on the pier 15.
Extend digit 10 by .

Although the drawings show the molding of a simple girder, the girder 10 may be extended to form a continuous girder or a rigid frame structure.

iii Advancement of the movable formwork device 1 (FIGS. 5 and 6) The supporting beams 4A, 4B and the formwork bottom plate 3 are lifted up again by the launching device 6, and the rollers are placed on the fixed support 9 below the central girder 20. 11 is installed, and here the jacks 5 are shortened and the support beams 4A and 4B are placed on the rollers 11.

Here, while the crane 17 remains on the girder 10, the support beams 4A, 4B and the formwork bottom plate 3 are moved forward while being guided by the rollers 11, and the inner girder 19 can be inserted between the next piers 15B and 15C. Make it.

V Preparation for pouring the next girder (Fig. 7) Lift up one support beam 4A, 4B with the lifting device 6, remove the rollers 11, then shorten the jacks 5 and move the sliding body 8 to the rail. Put it on top of 12.

Here, the supporting beams 4A and 4B are brought close to each other, the inner girder 19 is inserted between the piers 15B and 15C, and the crane 17 is moved forward while being guided by the rail 25 onto the rail 16 (as shown by the imaginary line in the figure).

). Furthermore, the formwork bottom plate 3 is lifted by the lifting device 6.
and by lifting up the supports 4A and 4B and piers 15B and 15C.
Preparation for pouring the girders between them is completed.

The movable formwork device according to the present invention places a formwork bottom plate divided into two in the bridge width direction on a movable support beam that is movable in the longitudinal direction of the bridge and moves it appropriately in the longitudinal direction of the bridge. The movable support beam is lowered by a hoisting device in order to separate it from the cast concrete formwork bottom plate, and the formwork bottom plate is moved as described above so that the formwork bottom plate can pass through the position of the pier. The structure of the device is extremely simple, as the bridge is divided into two parts, and the movable support beams that support each divided part are made movable in the width direction of the bridge by means of sliding bodies in order to allow the two halves to approach and separate from each other. It has the excellent effect of being able to mold girders with high efficiency.

[Brief explanation of the drawing]

The drawings show an embodiment of the movable formwork apparatus according to the present invention, and FIG. 1 is a plan view showing the girder casting state, and FIG.
Figure 3 is a front view, Figure 3 is a plan view showing the forward preparation state, and Figure 4 is a front view.
The figure is a front view of Fig. 3, and Fig. 5 is a plan view showing the forward state.
Fig. 6 is a front view of Fig. 5, Fig. 7 is a plan view showing the girder driving preparation state, and Fig. 8 shows the left half of the embodiment in the girder casting state and the right half showing the forward preparation state. FIG. Note that the bottom plate of the formwork is omitted in FIGS. 1, 3, 5, and 7. DESCRIPTION OF SYMBOLS 1... Mobile formwork device, 2... Bridge, 3... Formwork bottom plate, 3A, 3B... Divided part, 4A, 4B... Movable support beam, 5... Jacket, 6... ... Lifting device, 7...
・Wheel, 8...Sliding body, 9...Fixed support, 10.
IOA, 10B...digit, 11...coro, 12...
Rail, 13...Screw jack, 14...Advancing/retracting rod, 15, 15A, 15B, 15C... Pier,
16...Rail, 17...Portal crane, 18...
・Medium size, 19...Inner girder, 20...Central girder, 21...Outer girder, 23...Beam, 24...Wheel, 25...Rail.

Claims (1)

[Scope of Claims] 1. Each divided portion of the form bottom plate divided into two in the bridge width direction is supported by a movable support beam, and the movable support beam is equipped with a lifting device and a lifting device capable of raising and lowering the movable support beam. A sliding body is provided that can move the movable support beams toward and away from each other, and the movable support beams can be moved in the longitudinal direction of the bridge by a separate sliding body. Mobile formwork equipment.