JPS6157767A - Construction of culvert by running moving type outer mold frame - 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 "Field of Industrial Application" The present invention relates to a method of constructing a culvert using a movable formwork as an outer formwork.

"Conventional technology" Inner formwork and outer formwork are used in the construction of culvert concrete, but among these formworks, the inner formwork is
Various types of molds have been put into practical use in which the entire formwork is placed on a trolley or wheels are installed directly on the formwork to move it. 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 a body material, omitting the culvert, or using only a small culvert, but if the width of the culvert is large, In this case, the body material sag, and in order to prevent this, a strong frame is required, and the outer formwork apparatus 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 a large construction area is required.

"Problems to be Solved by the Invention" In view of the above-mentioned circumstances, the present invention adopts a mobile outer formwork with excellent workability, and utilizes the tension materials and connecting body materials that were necessary for construction. The purpose of the present invention is to provide a method for constructing culverts that can be carried out safely and efficiently without the use of culverts.

[Means for Solving the Problems] The present invention provides a traveling caster equipped with wheels that are movable and adjustable in the transverse direction of the formwork at the lower part of the formwork body, and at the upper end of the formwork body. , using a movable external formwork device which rotatably connects the base end of a beam with a running wheel at the tip, and the device is fixed to the outside of the culvert to be constructed via the running caster. It is placed on the lower rail that has been laid, and the traveling wheels provided on the beam of the device are engaged with the upper rail supported on the reinforcing of the culvert so that it can run freely, and the equipment is installed separately at a predetermined construction location. By connecting with the installed inner formwork device,
The beams of the outer formwork device are rotated upward, concrete is poured between the forms of the outer formwork device and the inner formwork device, and after the concrete has hardened, the beams are rotated back and It is characterized in that the running wheels are engaged with the upper rail and the outer formwork device is moved along the lower rail and the upper rail.

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

In the figure, reference numeral 1 denotes the foundation structure of the culvert to be constructed, and a lower rail 3 is installed on the outside of the foundation structure through brackets 2.2 arranged in a row at required intervals in the length direction. 4
is a mobile outer formwork device used in the present invention,
A running gear vehicle 9 is attached to the lower part of a form body 8 formed by combining vertical butterflies 5 and horizontal butterflies 6 and attaching a weir plate 7 to the front surface thereof.

The traveling caster 9 has an L-shaped push-in 11 attached to a vertically long box 10 so that it can be raised and lowered by rotating a threaded rod 12 built into the vertically-long box 10. It is constructed by attaching an internal threaded rod 14 to a stamping 11 so that it can be moved horizontally.This structure is a well-known traveling caster that has been conventionally used for moving formwork, so a detailed explanation will be given below. Omitted. Note that, in this traveling caster 9, the lifting adjustment mechanism using the vertically long box 10 and the threaded rod 12 may be excluded, and only the lateral movement adjustment of the wheel 13 using the threaded rod 14 may be used.

At the upper end of the formwork body 8, that is, at the upper end of the vertical butterfly 5 or the support member separately provided on the formwork body 8, the middle part of a beam member 15 formed long in the transverse direction of the formwork body 8 is horizontally attached. The beam material 15 is detachably attached to the bin 16.
The front part of the beam member 15 can be freely adjusted by a telescoping device 17 such as a turnbuckle, and the rear end of the beam member 15 and the vertical butterfly 5 are connected by a place material 18 which can be retracted and adjusted. It is rotatable about the beam 16 in the direction of the arrow in FIG.

The traveling casters 9 and the beams 15 are normally installed at the front and rear parts of the formwork, respectively, but if the formwork is long, they may be installed at more locations. If the form body is short, it may be provided at only one location.

The inner formwork used in the present invention may be of any type, but from the viewpoint of efficiency of construction and labor saving, for example, a mobile inner formwork device as shown in the figure is used. It is preferable to use 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 connected by a pin 24, and the side wall form 23 is tilted and adjusted around the pin 24 by expanding and contracting a tension adjustment rod 25 connected between the slab form 22 and the lower part of the side wall form 23. It is something that can be done.

The present invention is to construct a culvert using each of the above-described formwork devices 4.20.

To do this, first, the inner formwork device 20 is transported to the construction position, and the slab formwork 22 and side wall formwork 23 are moved onto the traveling trolley 21.
It is shaped into a predetermined shape by adjusting the height of 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 horizontal reinforcements 27, and the slab part of the culvert has main slab reinforcements 28, transverse reinforcements 27, and various reinforcing bars 28'. are combined with each other to form a composition.

And the reinforcement arrangement, for example, the slab main reinforcement 28 on the upper layer of the slab.
Then, a supporting reinforcing bar 30.30 whose upper part protrudes upward beyond the concrete placing line 29 of the slab is fixed by welding or the like, and the rail support 31 is attached to this supporting reinforcing bar 30.30 so that its lower surface is connected to the concrete placing line 29. Attach it removably so that it matches the

A plurality of these rail supports 31 are installed at required intervals in the length direction of the culvert.
．． 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 and the construction of the upper rail 32 are completed, the outer formwork device 4 is placed on the lower rail 3 via the wheels 13 of the traveling caster 9, and the beam material 15 is placed horizontally. Then, the running wheels 19 are engaged with the upper rail 32. Then, by operating the screw rod 14 of the traveling caster 9, the L-shaped pusher 11 is moved laterally with respect to the wheel 13, and the telescopic adjustment device 17
The projecting length of the beam is adjusted by the operation, and the vertical butterfly 5 is moved laterally to adjust the outer formwork device 4 to a position with a predetermined distance from the inner formwork device 20. Next, the outer formwork body 8 and the side wall formwork body 2
3 are connected to each other by a separator or the like. Next, as shown in FIG. 2, the place material 18 is shortened, the beam material 15 is rotated, the running wheels 19 are separated from the upper rail 32 and retracted upward, and the temporary fixing 32 is released and the rail 32 is moved. The support body 31 is removed, and further the support body 31 is removed if necessary. Then, concrete 34 is placed up to the height of concrete placement line 29.

After the poured concrete 34 hardens, the support 31 is placed again.
, while installing the upper rail 32, place material 18
The beam member 15 is rotated downward and returned to the traveling wheel 19.
is engaged with the upper rail 32. And both formwork 8.2
3, the inner formwork 20 is retracted by the tension adjustment rod 25, the side wall formwork 23 is tilted inward, and the traveling carriage 21 is lowered. be done.

In addition, the outer formwork device 4 operates the screw rods 14 of the traveling caster 9 to bring the formwork body 8 closer to the wheels 13, and operates the expansion and contraction device 17 of the beam material 15. Running wheel 19
On the other hand, if the mold body 8 is moved outward, it will be demolded into a state as shown in FIG.

After demolding, the inner formwork device 20 is pushed forward and moved to the next construction site. In addition, the outer formwork device 4 connects the upper rail erected in the same manner as described above on the reinforcement of the culvert constructed at the next construction site with the upper rail 32 erected so far, and prepares for movement. After adjusting the upper and lower rails 3
It is supported and guided by 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. Note that the support reinforcing bars 30
In order to improve the workability of attaching and detaching the rail support 30, it is preferable to use a separator conventionally used for formwork sets, or one having a similar structure.

``Effects of the Invention'' As explained above, the present invention provides a running wheel having wheels movable and adjustable in the transverse direction of the formwork mounted on the lower part of the formwork body, and a traveling wheel provided on the lower part of the formwork body so as to move and adjust freely in the transverse direction of the formwork. In this method, a movable external formwork device is used, in which the base end of a beam material is rotatably connected to the base end of a beam provided with a running wheel at the tip, and the device is mounted on the outside of the culvert to be constructed via the running caster. It is placed on the lower rail that has been laid, and the traveling wheels provided on the beam of the device are engaged with the upper rail supported on the reinforcing of the culvert so that it can run freely, and the equipment is installed separately at a predetermined construction location. Connect with the installed inner formwork device, rotate the beams of the outer formwork device upwards, pour concrete between the forms of the outer formwork device and the inner formwork device, and after the concrete hardens. , the beam material is rotated back, its running wheels are engaged with the upper rail, and the outer formwork device is moved along the lower rail and the upper rail, so it is different from the conventional method. The upper rail can be easily erected without using tension members to support the outer formwork or strong body members to connect the formwork, and the outer formwork is stabilized by the lower and upper rails. It is supported and can be moved, and various operations such as shaping, membrane shape, and movement are extremely simple and easy. Formwork equipment can also be manufactured easily and inexpensively, significantly improving the efficiency and labor saving of culvert construction. It can have many excellent effects, such as:

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and Fig. 1 is a front view showing the installation state of the outer formwork device and the inner formwork device, and Fig. 2 is a diagram showing concrete being poured by rotating the beam material. Figure 3 is a front view showing the outer formwork device and inner formwork device removed from the molds, and Figure 4 is a front view showing the state with the upper rail and rail support removed. It is. 1...Foundation structure 3...Lower rail 4...Outer formwork device 8...Form body 9...Travelling vehicle 13...Wheel 15...
・Beam material 16...Bin 17...Expansion device
19... Traveling wheel 20... Inner formwork device 21
... Traveling trolley 22 ... Slab formwork 23 ... Side wall formwork 26.27.28 ... Reinforcement arrangement 29 ... Concrete placement line

Claims (1)

[Claims] At the bottom of the formwork, a traveling caster with wheels that can be moved and adjusted in the transverse direction of the formwork is installed, and at the upper end of the formwork, a base end of a beam is provided with a running wheel at its tip. Using a movable external formwork device in which parts are rotatably connected, the device is placed on a lower rail laid along the outside of the culvert to be constructed via its traveling casters, and the device is The running wheels installed on the beams are engaged with the upper rails supported on the reinforcement of the culvert so that they can move freely, and the outer formwork is connected to a separately installed inner formwork device at a predetermined construction location. The beams of the equipment are rotated upwards, concrete is poured between the forms of the outer formwork device and the inner formwork device, and after the concrete has hardened, the beams are rotated back and their running wheels are A method for constructing a culvert using a mobile outer formwork device, characterized in that the outer formwork device is moved along a lower rail and an upper rail by being engaged with an upper rail.