JPS62288261A - Moving type mold frame construction method of high bridging slab - 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] 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a mobile formwork construction method for elevated slabs for railways, roads, etc.

[Conventional technology]

Construction of concrete viaducts involves constructing structures of almost the same shape one after the other, so in order to save labor and improve efficiency, a construction method using movable formwork is adopted for construction of formwork. It has started to be done.

There are two ways to move formwork: a crane-based lifting method and a traveling movement method. Conventionally, when using the hanging movement method, large-sized lanes such as gate-type cranes have been used, and formwork construction Not only will the crane be large-scale, but a large dedicated site will be required to install and move the crane, resulting in enormous costs. Additionally, it is extremely difficult to install large cranes in mountainous areas, making it impossible to use mobile formwork.

In view of the current situation, the inventor of the present invention has endeavored to realize formwork construction using the traveling force method, and has made many proposals and practical applications so far. For example, VF Gansho 61-254
As in No. 95, the formwork to be constructed between the piers of the viaduct slab is installed with a small formwork device formed several times in width in the width direction of the viaduct slab, and the formwork is installed between the piers in the transverse direction between the piers. We have completed a construction method using mobile formwork that is easy to move from one bridge pier to the next after construction (vertical movement) by just moving (horizontal movement).

[Problem that the invention seeks to solve]

In the invention of Japanese Patent Application No. 61-25495, in order to move the formwork device vertically, support girders are installed on the side forces of the piers arranged in a row, but in this case, if the height of the piers is high, there is no problem. However, if the height of the pier is low, the support girder will inevitably be installed at a lower level, making it difficult to secure enough space from the ground to the bottom of the support girder, making it difficult to carry in and out of equipment and work. will occur.

In addition, since each formwork device is supported via wheels,
The wheels must be able to withstand the heavy load of poured concrete, making the equipment expensive. Furthermore, since each formwork device is independent, there are still problems that need to be improved, such as the need to move each formwork individually.

This 4° plan was made in order to solve the problems mentioned in Section 111j, and the relatively small lane used for the erection of each formwork device was used for removing and moving the formwork device after construction. By also utilizing the method, the construction of support girders for the vertical movement of the frame equipment can be omitted, and the wheels are used only when moving the formwork equipment, reducing wheel costs. With,
It is an object of the present invention to provide a formwork construction method that can more efficiently carry out the movement and removal of formwork devices by connecting three formwork devices.

[Means for solving problems]

The structure of the present invention will be described with reference to drawings corresponding to embodiments. The present invention provides a structure in which each bridge pier 1.1 arranged in a row at a predetermined interval in the longitudinal direction of a viaduct slab 2 is A rail 4.4 for lateral movement of formwork along the direction is constructed, and on the other hand, a formwork device 5 with a width divided by several parts in the viaduct slab 2 is constructed, and a rail 4.4 for lateral movement of formwork is constructed between the piers 1.1. .4, a plurality of the formwork devices 5 are erected at predetermined positions via pedestals 11.11, slab concrete is poured onto the formwork body 8.10, and after the concrete has hardened, the mold Frame VC position 5.5
The formwork body 8.10 is lowered and peeled off from the concrete, and then each formwork device 5.5 is integrally connected, and the connected formwork device 5.5 is placed on the stand $11. .1
Instead of 1, the connected formwork device 5.5 is supported via several wheels 7.7, and the connected formwork device 5.5 is moved to the end of the formwork lateral movement rail 4.4, and the formwork device located at that end is moved. 5 is uncoupled, separated, and lifted out of the bridge pier using a crane or the like.

〔Example〕

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

In the figure, 1.1... are piers arranged at approximately equal intervals in the length direction of the viaduct slab 2 to be constructed, and the viaduct slab 2 will be constructed on top of these piers 1.1... be. When viewed in cross section, this viaduct slab 2 generally has a continuous shape consisting of a central portion a on the pier 1 and portions s and b on both sides of the central portion a that protrude outward from the pier 1. (See figure fl1). The embodiments of the present invention will be explained using the construction of such a viaduct slab 2 as an example, but the present invention can also be applied to the construction of a viaduct slab that does not have the above-mentioned overhanging portions (b). be.

Attach a bracket 3.3 to the upper part of each pier 1 on the side facing the adjacent pier, and place the elevated bridge or rub 2 on top of the bracket 3.3.
Formwork horizontal movement rail 4.4, which is formed along the middle direction of the formwork
erect. In addition, as a means for constructing this rail 4, instead of using the above-mentioned brackets 3.3, it is also possible to construct a support from the ground and erect the rail 4 thereon. It may be economically advantageous if the height is low. Further, the formwork lateral movement rail 4 may be made of square copper as shown in the figure, or a separate rail may be laid on top of the I-beam.

5.5... are traveling formwork devices mounted on rails 4.4 for horizontal movement of formwork installed opposite to each other, each of which is formed in the same way and has a pedestal 6 with a rectangular cross section. Eleven wheels 7.7 are removably provided on the lower surface of both ends of the frame 6 and run by engaging with the rails t for rolling the formwork, and on the upper surface of the pedestal 6, a weir plate is attached to the butter material. The frame body 8 is mounted on the frame 6
The width of the IF device 5, which is an addendum that can be freely lowered by adjusting bolts 9, 9, which are vertically adjustable, is several times the width of the viaduct slab 2.

The construction of the viaduct slab 2 is carried out using the traveling formwork device 5.5 configured as described above, and each bridge pier 1.1 installed in a row is
The construction work will be carried out sequentially, with the intervals (spans) set as the α-position construction sections.

First, the traveling formwork devices 5.5... are placed on the opposed formwork lateral movement rails t, 4, which are constructed between the first construction pier] and the wheels 7.7 of the first construction pier to be constructed first. 1.4, run on rails 1.4 to a specified position, and then
Arrange them in 1F rows as shown in the figure. Next, as shown in FIG. 12, a shirt 4 (not shown) is interposed between the pedestal 6 and the rail t, and the wheel 7.7 is moved to the pedestal 11.1 using the shirt 4 (not shown).
11 Instead, support the device 5 on the rail 4-H and adjust the form body with the adjustment bolts! 3. Center at a predetermined height of 11γ by repeating step 9. In addition, the wheel 7 was not used for one time (this, the pedestal 1
The formwork device 5.5 can be placed in position on the rails 4, 1-1 via 1 with a crane. Furthermore, an overhanging formwork 10 is installed along the lower surface of the overhanging part on the traveling formwork device 5 located below the overhanging part.

Then, the reinforcing bars of the viaduct slab 2 are assembled on top of these form bodies 8, 8, 10, and 10, and concrete is poured. After the concrete hardens, as shown in the fjSS diagram, the adjusting bolts 9.9 are removed to peel off and lower the formwork 8.10 from the concrete, and the overhanging formwork 10 is removed. Next, as shown in FIG. 4, after each formwork device 5.5 is integrally connected by a fastener 12.12, a jack (not shown) is again inserted between the pedestal 6 and the rail 4. By this process, 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 to the rails via the wheels 7.7. 4. Support it on top.

Subsequently, as shown in FIG. 15, the connected formwork apparatus 5.5 is pushed forward to position the formwork apparatus 5 at its end at the end of the rail 4. Therefore, the formwork device 5 at the end thereof is suspended by a crane (not shown), and the mold next to it,
The binding device 12 with the frame device 5 is removed and separated, and the sixth [7I
As shown in the figure, a crane (not shown) is used to lift it out from between piers 1.1. After this lifting, if necessary, change the mounting location of the wheels 7, push the connected formwork device 5.5 again, position the end device 5 at the end of the rail 4, and proceed as follows. The same operation is repeated to finish lifting all the formwork devices.

The suspended formwork equipment will be moved and installed between the next piers, or removed.

〔Effect of the invention〕

As explained above, according to the construction method of the present invention, the formwork used to construct the slab concrete between each pier is a small traveling formwork device, so it is easy to move by traveling or using a crane, and the work is safe. It is efficient, only a small crane is needed, and the formwork equipment uses wheels only when moving it, and supports it through the pedestal when pouring concrete, so the wheels are not used for the formwork. It is simple and easy to use because it only needs to be large enough to handle the load when moving the frame device.
It can be made inexpensive, and wheels and costs can be saved. In addition, each formwork device is installed after concrete construction.
Since they are connected together and moved on a rail, and each piece is suspended from the end of the rail, the formwork equipment can be moved efficiently, and only a small number of wheels are required for movement. It has many excellent effects, such as a good wheel availability and a corresponding reduction in costs.

[Brief explanation of the drawing]

Since the drawing schematically shows an embodiment of the construction method of the present invention,
The Si diagram is a front cross-sectional view showing the formwork equipment being carried in parallel with the lever legs open, and Figure 2 is a front sectional view of the viaduct slab. Figure 3 is a front cross-sectional view showing the state in which the frame is centered, Figure 3 is a -rJE cross-sectional view showing how the formwork has been peeled off and each formwork device is connected, and Figure 4 is a sectional view showing the connected formwork device being replaced with a pedestal and wheels. Figure 6 is a front cross-sectional view showing the connected formwork device being moved to the end of the rail. FIG. 1... Pier 2... Viaduct slab 4.
...Rail for horizontal movement of formwork 5...Formwork device 6... Frame 7...Wheels 8.10...Formwork body
11...Pedestal 12...Both binding

Claims (1)

[Claims] Rails for horizontal movement of formwork along the width direction of the slab are installed on each piers arranged at predetermined intervals in the length direction of the viaduct slab, and on the other hand, a mold with a width divided by several parts of the width of the viaduct slab is installed. A frame device is configured, and on the formwork lateral movement rail between the piers,
A plurality of the formwork devices are erected at predetermined positions via pedestals, slab concrete is poured onto the formwork bodies, and after the concrete has hardened, the formwork bodies of the formwork devices are lowered and poured from the concrete. 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 device is mounted on the side of the formwork. A mobile formwork construction method for elevated bridge slabs, which is characterized by moving the formwork to the end of the moving rail, uncoupling and separating the formwork device located at that end, and lifting it out of the bridge pier using a crane or the like.