JPH0141793B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of constructing a culvert using a movable formwork as an outer formwork.

Inner formwork and outer formwork are used in the construction of culvert concrete, but among these formwork, for the inner formwork, the entire formwork is placed on a trolley, or wheels are installed directly on the formwork. Various types of robots that move by hand have been put into practical use. In addition, there is also a type of outer formwork that is moved by installing running wheels at the bottom of the formwork, but the outer formwork must be provided with tension members to prevent it from collapsing, and the culvert If the width of the culvert is small, the culvert can be constructed by connecting the pair of outer formwork on both sides with body materials, omitting the struts, or using only small struts, but if the width of the culvert is If it becomes too large, the body material will sag, so
In order to prevent this, a strong structure is required,
The outer formwork equipment becomes enormous and heavy.
Therefore, in the past, when constructing large width culverts, traditional methods of hand-assembling, hand-painting, or moving formwork using a crane have been adopted, and the handling of the outer formwork requires a lot of effort and time. The situation is such that it requires a large construction site.

In view of the above-mentioned circumstances, the present invention adopts a mobile outer formwork with excellent workability, eliminates the use of tension members and connecting body materials that were necessary during construction, and is safe and efficient. This method aims to provide a method of constructing a culvert that allows easy work, in which the outer form frame is placed on the lower rail via the wheels of a traveling caster installed at the bottom of the culvert, and the upper end of the outer form frame is placed on the lower rail. By engaging the wheels installed on the beams connected to the upper rails supported on the reinforcement of the culvert and supporting the outer formwork by these lower rails and upper rails,
It is characterized by being able to perform construction operations such as shaping, demolding, and moving the formwork.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

In the figure, 1 is the foundation structure of the culvert to be constructed, and on the outside of it, the lower rail 3 is installed via brackets 2, 2 arranged in a row at required intervals in the length direction.
has been installed. 4 is a traveling type outer formwork device used in the present invention, which includes vertical butterflies 5 and horizontal butterflies 6.
A traveling caster 9 is attached to the lower part of a formwork 8 which is formed by combining the above and attaching a weir plate 7 to the front surface of the formwork 8.

The running gear 9 has an L-shaped rod 11 in a vertical box 10.
is attached to the vertically long box 10 so that it can be raised and lowered by rotating a screw rod 12 installed inside the box 10, and a bracket for the wheel 13 is attached to the L-shaped rod 11, and a screw rod 14 inside the box can be adjusted horizontally. Since this structure is a well-known traveling caster conventionally used for moving formwork, detailed explanation will be omitted. The traveling caster 9 is normally attached to the vertical butterfly 5 or the horizontal butterfly 6 directly or via a suitable bracket, but it may be mounted to the formwork 8 via a special support member.

At the upper end of the form body 8, that is, at the upper end of the vertical butterfly 5 or the support member separately provided on the form body 8, a horizontal jack 15 formed long in the transverse direction of the form body 8 is fixed. . This horizontal jack 15 is also conventionally known, and by rotating a screw rod 16 provided in the horizontally long box, a pin 17 that is screwed into the rod and protrudes from the box can be adjusted in the horizontal direction. The outer end of a beam 18 protruding inward from the culvert is rotatably connected to the pin 17, and a pair of spaced running wheels 19,
19 is mounted by a vertical axis.

The above-mentioned running gear 9 and horizontal jack 1
5 and the beams 18 connected thereto are normally provided at least at the front and rear parts of the formwork, but if the formwork is short, the horizontal jacks 15 and the beams 18 are provided at one location. All you need to do is set it to .

Regarding the inner formwork used in the present invention,
Although it may be of any type, it is preferable to use a movable inner formwork device as shown in the figure, for example, from the viewpoint of efficiency of construction and labor saving.
Since this inner formwork device 20 is already known, only its outline will be explained. A slab formwork 22 is placed on a height-adjustable traveling cart 21, and the outer end of the slab formwork 22 is The side wall form 23 is pivotally attached by a pin 24, and the side wall form 23 is rotated around the pin 24 by expanding and contracting the tension adjustment rod 25 connected between the slab form 22 and the lower part of the side wall form 23. The tilt can be adjusted.

To construct a culvert using each of the above-mentioned formwork devices 4 and 20, first, the inner formwork device 20 is transported to the construction position, and its slab formwork 22 and side wall formwork 23 are moved onto the traveling carriage 21. It is shaped into a predetermined shape by adjusting the height and adjusting the expansion and contraction of the tension adjustment rod 25. Next, the reinforcement of the culvert is installed.
Generally, the side walls of the culvert have vertical main reinforcements 26 and longitudinal main reinforcements 27, and the slab part of the culvert has main slab reinforcements 27 in the transverse direction.
8, transverse reinforcements 27, various reinforcing reinforcements 28', etc. are connected to each other. Then, supporting reinforcing bars 30, 30 whose upper parts protrude upward beyond the concrete placement line 29 of the slab are fixed to this reinforcement arrangement, for example, to the slab main reinforcing bars 28 in the upper layer of the slab, by welding or the like. rail support 31
is removably attached so that its lower surface coincides with the concrete placement line 29. A plurality of these rail supports 31 are attached at required intervals in the length direction of the culvert, and these rail supports 31,
An upper rail 32 is constructed over the culvert in the length direction of the culvert, and is temporarily fixed 33 to the rail support 31 by appropriate means.

In this way, once the reinforcement arrangement and the erection of the upper rail 32 have been completed, the outer formwork device 4 is placed on the lower rail 3 via the wheels 13 of the traveling caster 9, and the pair of beam members 18 are placed on the lower rail 3. The upper rail 32 is sandwiched and engaged between the running wheels 19, 19. The shaping and positioning of the outer formwork device 4 is carried out in the vertical direction by vertical adjustment by operating the threaded rod 12 of the traveling caster 9, and in the transverse direction of the culvert by adjusting the elevation by operating the threaded rod 12 of the traveling caster 9.
Wheel 13 and L-shaped rod 11 by operating screw rod 14
This can be easily carried out by adjusting the relative lateral movement between the horizontal jack 15 and the beam 18 by operating the threaded rod 16 of the horizontal jack 15. After shaping the outer formwork device 4, the outer formwork body 8 and the side wall formwork body 23 are connected to each other with a separator or the like to complete the setting of the formwork. Concrete 34 is then placed up to the height of concrete placement line 29.

After the poured concrete 34 has hardened, both formworks 8 and 23 are uncoupled, and the inner formwork device 20 contracts the tension adjustment rods 25 to tilt the side wall formwork 23 inward, and the traveling carriage If you lower 21, the second
It is demolded to the state shown in the figure. In addition, the outer formwork device 4 operates the threaded rod 14 of the traveling caster 9,
While bringing the form body 8 closer to the wheels 13,
By operating the screw rod 16 of the horizontal jack 15 and moving the form body 8 outward relative to the beam 18, the second
It will be demolded to the state shown in the figure.

After demolding, the inner formwork device 20 is pushed forward and moved to the next construction site. In addition, the outer formwork device 4 is
The upper rail, which was constructed in the same manner as above, on the reinforcement of the culvert constructed at the next construction site,
It is connected to the upper rail 32 that has been constructed so far and is ready for movement, and is then supported and guided by the lower rail 3 and the upper rail 32 and moved to the next construction site. By repeating the above-mentioned work, the construction of the culvert can proceed.

Further, after the outer formwork device 4 is moved, the upper rail is removed from the rail support 31 and the rail support 31 is removed from the support reinforcing bars 30. Since the upper part is protruding, cut it and remove it. In order to improve the workability of attaching and detaching the rail support 31, it is preferable to use a separator conventionally used for setting formwork, or one having a similar structure, as the supporting reinforcing bar 30.

As explained above, the present invention includes a traveling caster equipped with wheels that are movable and adjustable in the transverse direction and the vertical direction of the formwork at the lower part of the formwork, and at the upper end of the formwork. Using a movable external formwork device in which a beam member provided with running wheels is connected so as to be movable and adjustable in the transverse direction of the formwork, the device is laid along the outside of the culvert to be constructed via the wheels of the running caster. At the same time, the running wheels installed on the beams of the equipment are engaged with the upper rails supported on the reinforcement of the culvert so that they can run and move freely, and the internal formwork installed separately is installed. Since it is characterized by placing concrete between it and the equipment,
The upper rail can be easily erected without using tension members to support the outer formwork or body members to connect the formwork as in the past, and the outer formwork is constructed by the lower rail and the upper rail. It is stably supported and can be moved, and its shaping, deforming, and movement operations are extremely simple and easy. Formwork equipment can also be manufactured easily and inexpensively, making culvert construction more efficient and labor-saving. It can bring about many excellent effects, including significant improvements.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention.
The figure is a front view showing the installed state of the outer formwork device and the inner formwork device, Fig. 2 is a front view showing the removed state of the outer formwork device and the inner formwork device, and Fig. 3 is the upper rail and rail. FIG. 3 is a front view showing a state with the support body removed. 1... Foundation structure, 3... Lower rail, 4...
Outer formwork device, 8...Form body, 9...Travelling vehicle, 1
3... Wheel, 15... Horizontal jack, 17... Pin, 18... Beam material, 19... Running wheel, 20...
Inner formwork device, 21... Traveling trolley, 22... Slab formwork, 23... Side wall formwork, 26, 27, 28...
Reinforcement arrangement, 29... Concrete placement line, 30... Support reinforcing bars, 31... Rail support, 32... Upper rail, 34... Concrete.

Claims (1)

[Claims] 1 At the bottom of the formwork, a traveling caster with wheels that can be moved and adjusted in the transverse direction and vertical direction of the formwork is installed, and a beam member with running wheels installed at the upper end of the formwork is attached to the formwork. using a movable outer formwork device connected to the culvert so as to be adjustable in its transverse direction, and placing the device via the wheels of its traveling casters on a lower rail laid along the outside of the culvert to be constructed;
The running wheels installed on the beams of the equipment are installed so that they can move freely by engaging with the upper rails supported on the reinforcement of the culvert, and concrete is poured between them and the separately installed inner formwork equipment. A culvert construction method using a traveling external formwork, which is characterized by: