JPH0511163B2 - - Google Patents

Description

[Detailed description of the invention]

"Industrial Field of Application" The present invention relates to a method for constructing movable formwork for elevated bridge slabs, which enables continuous construction of elevated bridge slabs for railways, roads, etc. ``Conventional technology'' Construction of concrete viaducts involves constructing structures of almost the same shape continuously, so in order to simplify construction work and improve efficiency, mobile mold construction is recommended. Construction methods using frames have come to be adopted. This type of mobile formwork construction method is, for example,
As shown in Publication No. 37363, shoring is erected and a formwork is assembled on it, and the formwork is moved using a large crane such as a portal crane. Therefore, not only is it necessary to install a particularly large crane, but also a large dedicated site is required for installing and moving the crane, which increases costs. In addition, in mountainous areas or when the piers are very high, it is extremely difficult to install large cranes, so mobile formwork cannot be used for such construction, and traditional hand-building and hand-building methods are not possible. The reality is that the formwork construction is inefficient and requires a lot of manpower. "Problems to be Solved by the Invention" In order to solve the problems of this type of construction method using movable formwork, the present inventor has previously published Japanese Patent Application Laid-Open No. 58-94504.
We have been developing a construction method in which the formwork is moved as shown in the publication. By further improving the above-mentioned invention, the present invention can further improve the economic efficiency of construction, improve the ease of work, safety, and efficiency, and further improve the weight of the formwork equipment used. The aim is to provide a new formwork construction method that can reduce costs and reduce costs. "Means for Solving the Problems" The movable formwork construction method of the present invention will be explained with reference to drawings corresponding to embodiments. A plurality of piers 1, 1' are arranged in a row, and sets of the piers 1, 1' arranged in a row are arranged in a row at a predetermined interval in the length direction of the viaduct. Bracket 3,
3, formwork lateral movement rails 4, 4 along the width direction of the slab 2 are constructed except between the piers 1, 1' which are opposite to each other at the center of the slab 2, and A support girder 6 having rails 7, 7 for longitudinal movement of the formwork along the length direction of the viaduct slab 2 is installed between the piers 1, 1', and a pedestal 8
A form body 10 formed to have a width divided by several parts of the width of the viaduct slab 2 is provided on the upper surface portion so as to be movable up and down, and wheels 9, 9 that can run on the formwork lateral movement rails 4 are provided on the lower surface of both ends of the pedestal 8. A removably installed traveling formwork device A is configured, and a plurality of the traveling formwork devices A are loaded on the formwork lateral movement rails 4, 4 via their wheels 9, 9 and placed side by side. Then, each traveling formwork device A is supported on the formwork lateral movement rails 4, 4 via pedestals 15, 15 instead of wheels by telescopic operation of the jacks 14, and shoring 1 is installed on the support girder 6.
3, and place slab concrete on all the formwork bodies 10, 10a, 11. After the concrete hardens, formwork bodies 10, 11 of the traveling formwork device A are installed. is lowered and peeled off from the concrete, and the pedestal 15 is removed by the expansion and contraction operation of the jack 14, and the traveling formwork device A is supported on the formwork lateral movement rails 4, 4 via wheels 9, 9, and the support girder 6, the formwork body 10a and the support 13 are removed, and a pair of carts 16 having mounting rails 17 parallel to the rails 4 for horizontal movement of the formwork are mounted on the rails 7, 7 for vertical movement of the formwork, so that they can freely run. Each traveling formwork device A is moved on the formwork lateral movement rails 4, 4 and transferred onto the mounting rail 17 of the truck 16, and each traveling formwork device A is moved by the truck 16, 16. It is characterized in that it is moved sequentially between the piers to be constructed and transferred to the formwork lateral movement rails 4, 4 between the piers to be transported and transported. "Embodiments" Examples of the present invention will be described below with reference to the drawings. In the figure, 1 and 1' are the viaduct slabs 2 to be constructed.
A pair of piers 1 and 1' are arranged in a row at a predetermined interval in the width direction of the viaduct slab 2, and these piers 1 and 1' are arranged in a row at approximately equal intervals in the length direction of the viaduct slab 2. , 1', 1, 1'..., the viaduct slab 2 will be constructed. This elevated bridge slab 2, when viewed from its cross section, generally has a central portion a located between the piers 1 and 1', and overhanging portions on both sides of the central portion a that protrude outward from the piers 1 and 1'. b,
b are continuous (see Figure 1).
The embodiments of the present invention will be explained by taking the construction of such a viaduct slab 2 as an example, but the present invention
It is also applicable to the construction of elevated bridge slabs that do not have the above-mentioned overhanging portions b and b. The side facing the adjacent pair of piers 1, 1' of each pair of piers 1, 1' erected in the width direction of the viaduct slab 2,
That is, brackets 3, 3 are attached to the upper portions of the side surfaces of the piers 1, 1' along the width direction of the slab 2, respectively, and on top of these brackets 4, a formwork lateral movement rail 4, which is formed long along the width direction of the viaduct slab 2, is installed. Erection 4.
The rails 4, 4 terminate at their inner ends at opposite end faces of the piers 1, 1', respectively, and
Its outer end extends close to the outer end of the overhanging portion b of the viaduct slab 2. The formwork lateral movement rails 4 may be made of I-beams themselves as shown in the figure, or may be formed by separately laying rails on the I-beams. Further, brackets 5, 5 are installed on the opposite sides of the piers 1, 1' at positions lower than the bracket 3, respectively, and on these brackets 5, 5, there are provided brackets 5, 5 with a width that falls within the interval between the piers 1, 1'. A support girder 6 is constructed along the length direction of the viaduct slab 2, and a pair of formwork longitudinal movement rails 7, 7 are provided on the support girder 6. Note that the upper surface of the I-beam used for the support girder 6 can be applied to the rail 7 as is, as shown in the figure. A, A... are traveling formwork devices mounted between rails 4, 4 for horizontal movement of formwork, which are installed opposite each other, and are formed in the same way, with both ends of a pedestal 8 having a rectangular cross section. Wheels 9, 9 that can run while engaging with the formwork lateral movement rails 4 are removably provided on the lower surface, and on the upper surface of the pedestal 8, a viaduct slab made of butter material with a weir plate attached is provided. A frame body 10 formed to have a width divided into several widths of 2 is movable up and down by adjustment bolts 12, 12 provided on a pedestal 8 so as to be vertically adjustable. The width of the traveling formwork device A is such that it can move between the opposing piers 1 and 1' in the length direction of the support girder 6, that is, along the length direction of the viaduct slab 2. On the rails 7, 7 of the support girder 6, wheels 18, 18 that can run on the rails 7, 7 are mounted on a mounting rail 17 parallel to the formwork lateral movement rail 4 via a height adjustment device 19. The trolley 16 attached thereto is placed thereon. So, traveling formwork devices A, A with the above configuration...
As shown in Fig. 1 and Fig. 5 A, the unit section of construction is between the piers 1, 1', 1, 1' in a row, and the bridges are constructed on the piers 1, 1' and facing each other. The molds are mounted on the formwork lateral movement rails 4, 4 via wheels 9, 9, and run on the rails 4, 4 to a predetermined position to be arranged in parallel. Then, as shown in Figure 5 B,
Jacks 14, 14 are interposed between the pedestal 8 and the rail 4, and the pedestal 8 is lifted up by the extension of the jack 14, the wheels 9, 9 are removed, and the wheels 9, 9 are removed.
Place the pedestals 15, 15 on top, shorten the jack 14, and attach the pedestals 15, 15 as shown in FIG.
The pedestal 8 is lowered and supported. And the second
The form body 10 is set at a predetermined height position by adjusting the adjusting bolts 12, 12 as shown in FIGS. Also, on the support girder 6, a support 13 of the required height is installed.
(see Figure 2), the central formwork 1 is applied to the lower side of the central part between the piers 1 and 1' of the viaduct slab 2.
Erection 0a. Moreover, an overhanging formwork body 11 is added to the one located at each outer end of each of the parallel traveling formwork apparatuses A, A, which is applied to the lower side of the overhanging part b of the viaduct slab 2. Next, reinforcing bars for the viaduct slab 2 are assembled on top of the form bodies 10, 10a, and 11, and concrete is poured. After the concrete has hardened, remove the shoring 13 and the formwork body 10a, and operate the adjustment bolts 12, 12 of each traveling formwork device A to adjust the formwork body 1.
0 and 11 are peeled off from the concrete and lowered to remove the form body 11, and then jacked again.
is inserted between the pedestal 8 and the rail 4, and by the same operation as described above, the pedestal 8 is supported on the rails 4, 4 via the wheels 9, 9 (see Fig. 5 A), and the support girder 6 is Then, the form body 10a and the shoring 13 are removed. Then, as shown in FIG. 3, the carts 16, 16 are placed on the rails 7, 7 of the support girder 6, and
The rail 17 is positioned on a line connecting the rails 4, 4, and the height of the rail 17 is adjusted to the height of the rail 4 by adjusting a height adjustment device 19. Next, support girder 6 of each traveling formwork device A,
4 is run on the formwork lateral movement rails 4, 4, and its wheels 9, 9 are transferred and placed on the rails 17 of the trolley 16, as shown in FIG. Next, the traveling formwork device A mounted on the carts 16, 16 is pushed forward, and as shown in FIG.
1, 1', and move to the rails 17, 1 of the trolley 16.
7 is aligned with the formwork lateral movement rails 4, 4 attached to the piers of the next section, the traveling formwork device A is transferred onto the same rails 4, 4, and the next piers 1, 1, 1',
It is carried in between 1 and placed on a rack. When the movement of the traveling formwork device A is completed in this way, the carts 16, 16 are returned to their original positions, the next traveling formwork device A is transferred to the carts 16, 16, and the next pier 1 is moved in the same manner. , 1, and repeat the above-mentioned operations to complete the movement of the traveling formwork devices A, A, . . . . And each formwork body 1
0, 10, 10a, 11, 11 are set at predetermined positions, and the construction between the row piers 1, 1 is continued in the same manner. In addition, the jack 1 that raises and lowers the traveling formwork device A
4 may remain attached to the pedestal 8, and the wheels 9 may also be fixed instead of being detachable as in the previous embodiment. In that case, the pedestal 15 may be interposed adjacent to the wheels 9. Bye. Further, the support girder does not necessarily have to be installed on the bracket attached to the bridge pier as in the above embodiment, but can also be installed on a support built on the ground, for example. "Effects of the Invention" As explained above, the construction method of the present invention erects rails for moving the formwork along the width direction of the viaduct slab on each of the piers arranged in a row, and A support girder extending in the length direction is erected, and a traveling formwork device formed into several parts of the width of the slab is mounted in parallel on the formwork lateral movement rail between the piers, and slab concrete is poured. After curing, each traveling formwork device is moved on the formwork lateral movement rail and transferred to a trolley that can travel on the support girder. Since the formwork was moved and placed on the rail for lateral movement of the formwork between the piers and transported to a predetermined position, the formwork of the slab to be set between the construction piers was moved between the piers, which is the unit section of construction. It is possible to move the formwork without having to assemble and dismantle it each time it is constructed.Moreover, all movement is done by traveling, so there is no need to install a crane for movement, and the formwork equipment is small and lightweight with a split width. Therefore, traveling movement can be carried out easily, safely and efficiently, and the traveling formwork equipment uses wheels only when moving, and is supported through a pedestal when pouring concrete. Therefore, the wheels only need to be able to withstand the load when the formwork equipment is moved.
It has many excellent effects, such as being simple and inexpensive, and reducing the cost of wheels for moving the formwork.

[Detailed description of the invention]

The drawings schematically show one embodiment of the construction method of the present invention. Figure 1 is a front cross-sectional view showing the state in which traveling formwork devices are carried in between the piers and arranged in parallel, and Figure 2 is a diagram showing the formwork of the viaduct slab set. Figure 3 is a front cross-sectional view showing the state, with the formwork peeled off and the trolley placed on the support girder, and Figure 4 is a front cross-sectional view showing the trolley mounted on the trolley. Front cross-sectional view shown in Figure 5 I~
D is a front view showing the work order from carrying in the traveling formwork device to setting the formwork, FIG. 6 is a side view showing the installation state of the traveling formwork device and the support girder, and FIG. 7 is the traveling formwork device. It is a side view which shows the place where it was made to transfer to the trolley|bogie and was made to transfer between the next piers. A... Traveling formwork device, 1, 1'... Pier, 2...
... Viaduct slab, 3, 5... Bracket, 4...
Rail for horizontal movement of the formwork, 6... Support girder, 7... Rail for vertical movement of the formwork, 8... Frame, 9... Wheels, 10, 1
1... Form body, 12... Adjustment bolt, 13... Shoring, 14... Jacket, 15... Pedestal, 16...
...Dolly, 17...Package rail, 18...Wheel, 1
9...Height adjustment device.

Claims (1)

[Claims] 1. A plurality of piers are arranged in a row at a predetermined interval in the width direction of the viaduct slab, and sets of the arranged piers are arranged in a row at a predetermined interval in the length direction of the viaduct. A rail for horizontal movement of the formwork along the width direction of the slab is installed via a bracket except between the opposing piers at the center of the slab, and a rail for the length of the viaduct slab is installed between the opposing piers at the center of the slab. A support girder having rails for vertical movement of the formwork along the direction is erected, and a formwork body formed to have a width divided by several times the width of the viaduct slab is provided on the upper surface of the trestle so that it can be raised and lowered, and both ends of the trestle are A traveling formwork device is configured in which wheels capable of running on a rail for lateral movement of formwork are removably provided on the lower surface, and a plurality of the traveling formwork devices are mounted on the rail for lateral movement of formwork via the wheels. The traveling formwork devices are carried in and placed side by side, and each traveling formwork device is supported on the formwork lateral movement rail via a pedestal instead of wheels by the expansion and contraction operation of jacks, and the formwork body is placed on the support girder via a shoring. After the concrete has hardened, the formwork of the traveling formwork device is lowered to separate it from the concrete, and the pedestal is removed by expanding and contracting the jack. Then, the traveling formwork device is supported on the formwork lateral movement rail via wheels, the formwork body and the shoring are removed from the support girder, and the formwork lateral movement rail is placed on the formwork vertical movement rail. A pair of trolleys having mounting rails parallel to each other are mounted so as to be freely movable, and each traveling formwork device is moved on the rail for horizontal movement of the formwork and transferred onto the mounting rail of the trolley, and each traveling formwork is A mobile formwork construction method for elevated bridge slabs, characterized in that a frame device is sequentially moved by a trolley between the piers to be constructed, and transferred to a rail for horizontal movement of the formwork between the piers to travel and carry it in.