JPS62160374A - Construction of iron plate concrete silo - 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 is a steel plate concrete silo, which is made by pouring and covering the outer periphery of a steel plate cylindrical body and is a preferred structure for storing imported grains. Formwork equipment (
This invention relates to a construction method using a sliding form construction method (sliding device).

Conventional technology Conventionally, the construction methods for steel plate concrete silos include: ■Concrete “spraying method” (Japanese Patent Application Laid-Open No. 57-17807
Publication No. 0).

■Self-climbing method in which a steel plate cylinder takes the reaction force of climbing and slides step by step (Special Publication No. 52-197)
No. 02, Special Publication No. 80-26!111).

■Prefabricated construction methods using iron plate concrete silo rk and PC boards (Special Publication Sho!i?-50230) are well known.

■Also. The so-called sliding form construction method for constructing stone is also known (Hibun No. 59-33746). However, the silo constructed using this method does not have an iron plate cylinder.

Problems to be Solved by the Invention Compared to the sliding form construction method, the conventional construction methods described in ■ to ■ above have cold joints on the concrete pouring surface, poor airtightness, and discontinuous construction. Poor efficiency.

In addition, since the iron plate cylinder is configured to absorb the reaction force of climbing, an inner stage is essential inside the silo, which poses the problem of resulting in a costly construction device.

In addition, in the case of (2) above, there was a problem that it was impossible to erect a steel plate cylinder due to the presence of a yoke, and therefore a steel plate concrete silo could not be constructed.

Means for Solving the Problems As a means for solving the problems of the prior art described above, a method for constructing a steel plate concrete silo according to the present invention is shown in preferred embodiments in FIGS. 1 to 9 of the drawings. (a) First, the module iron plate (1
′), the steel plate cylinder (1) is assembled on the ground at the site to a size that allows it to be lifted. At the same time, at this stage, the slide guide (2) is moved in the axial direction of the outer peripheral surface of the iron plate cylinder (1).
and then install the studs.

(b) Next, the iron plate cylindrical body (1) is lifted and erected to construct an iron plate cylindrical body structure.

(c) Next, wall reinforcement is installed around the outer periphery of the iron plate cylindrical structure (1), and a slide device M (3) that goes up along the slide guide (2) is installed.

(d) Then, raise the slide device (3),
Concrete (10) is poured between the weir plate (4) supported by the slide device (3) and the steel plate cylindrical structure (1), and the same steps are repeated to continuously construct the concrete. I decided to do so.

The slide device 3 corresponds to the so-called formwork sliding device of the sliding form construction method, and is configured to hold onto the slide guide 2 and rise by absorbing the reaction force against falling outward. The structure has been improved so that it does not have a yoke that crosses 1 in the radial direction inside and out. Therefore, the steel plate cylinder 1 can be built freely at any time.

Therefore, the concrete 10 is poured while continuously raising the weir plate 4 with the slide device 3, and on the other hand, the erection of the steel plate cylinder 1 and wall reinforcement etc. are carried out in advance to the required height. Prepare for continuous construction.

Therefore, the construction method of the present invention is capable of pouring high-quality concrete with good airtightness without creating cold joints in the same manner as the normal sliding form construction method; It is efficient because construction can be done easily.

Example Next, a preferred embodiment of the invention illustrated in the drawings will be described.

Ma-? , Fig. 1A shows a module steel plate 1' manufactured in a factory, etc., and Fig. 1B and C show a steel plate cylindrical body 1 assembled on the ground at the site using the same module steel plate 1'. The module iron plate 1' is made, for example, in the shape of a circular arc, and has a height h of about 1.2 m to 2.4 m.

The iron plate cylinder body 1 is assembled by butt welding four of the module iron plates 1'.

In addition, Fig. 1C shows two iron plate cylinders 1 assembled as described above (however, the number is not limited to two, and any size and weight that can be lifted by a crane etc. is acceptable). The abutting portions are overlapped and circumferentially welded, and a slide guide 2 is attached in the axial direction of the outer circumferential surface, and is assembled into a unit. Studs (not shown) for integrating the steel plate and concrete are also provided protruding from the outer peripheral surface of the steel plate cylinder 1 by this stage.

The slide guide 2 is a rail material with an H-shaped cross section as shown in FIG. Each guide 2 has a length of about 50 cm, and is removably attached to the outer peripheral surface of the iron plate 1 with a port 13 and a nut 14, as shown in FIGS. 4 and 5.

By the way, for one wooden silo (about 7m to 9m in diameter), about 12 slide devices are used to slide the weir plate 4 by dividing the circumference equally, so there are only as many sets of slide guides 2 as are necessary for this purpose. It is attached to the outer periphery of the iron plate cylindrical body 1.

FIG. 2 shows a stage in which the steel plate cylinders 1 assembled into the ground as a unit as shown in FIG. 1C are suspended and piled up using a crane or the like. The suspended iron plate cylindrical body 1 is integrated by butt-welding the stacked stacked portions in the circumferential direction, and is successively constructed as an iron plate cylindrical body structure.

ff13 Figure A shows a stage in which a slide device 3 that ascends along a slide guide 2 is installed on the outer periphery of the iron plate cylindrical structure 1 constructed to the required height as described above, and a weir plate 4 is attached to this. It shows.

As shown in FIGS. 4 and 5, the details of the structure of the slide device 3 include a yoke 6 having a roller 5 at its inner end that rolls along the groove of the slide guide 2, and a fixed tab attached to the yoke 6. Consists of Raimisig Jack 8. The climbing jack 8 is configured to climb like a so-called inchworm along a rod 7 erected in advance. A belly riser 9 is attached to the inside of the lower part of the leg of the yoke 6, and a weir plate 4 is attached to the inside of the belly riser 9.
is installed. The height of the weir plate 4 is usually 100c.
It is rank m.

FIG. 3B shows wall reinforcing bars (not shown) installed between the steel plate cylindrical structure 1 and the sheathing plate 4, and the concrete 10 in the first stage.
This shows the stage at which the concrete was poured. Further, FIGS. 3C and 3D show a stage in which the slide device 3 is raised at a speed of, for example, about 20 cm per minute, and concrete placement is progressing. The concrete wall thickness is about 200-2501.

11 in the third diagram is a work scaffold suspended from the slide device 3 for finishing the surface of the poured concrete wall. Further, numeral 12 in FIG. 5 is a working floor for the slide device 3.

The slide guide 2, which has become useless after the slide device 3 has passed through it, may be buried in the concrete wall as it is, but it is removed by loosening the ports 13 and nuts 14 as much as possible and reusing it. For this reason, the length of each slide guide 2 is approximately 50 cm.

Thereafter, the slide device 3 is raised continuously to perform concrete pouring, and the steel plate cylinder l is placed as needed.
The process of constructing the building and installing wall reinforcing bars was repeated.
A steel plate concrete silo of the required height was completed.

FIG. 6 shows a plan view of a group of silos constructed by the construction method of the present invention. If possible, all silos can be constructed at the same time, or they can be divided into several groups. Note that the partition wall 16 forming the so-called side bin 15, which is a space surrounded by the silo outside the silo, is normally constructed integrally with the silo cylinder, but it may be constructed as a separate construction.

7 and 8 show a second embodiment in which a jack holder 2o is installed at the upper end of a steel plate cylindrical structure 1 that has been constructed to a predetermined height, and a jack 8 attached to this jack holder 20 is used. rod 7
Pull up the slide device 3 via the . A construction drawing using the so-called lift-up construction method is shown.

When this embodiment is compared with the first embodiment, the only difference is that the slide device 3 does not have a jerk.

As shown in FIG. 9, the jack receiving racks 20 are installed in a radial arrangement with the required number evenly spaced.

FIG. 8B shows a stage in which the jack pedestal 20 has been removed after concrete has been poured to the maximum height of the originally constructed steel plate cylindrical structure 1.

Moreover, FIG. 8C shows the progress of construction of the iron plate cylindrical structure 1 to the next level of height.

Further, the eighth diagram shows a stage in which the jack holder 20 is again installed at the upper end of the steel plate cylindrical structure 1, and the raising of the slide device 3 is resumed to perform concrete pouring. The same process is then repeated to construct a silo of the required height.

The effects of the invention have been described in detail in conjunction with the examples, and the method of constructing a steel plate concrete silo according to the present invention allows for continuous construction just like the so-called sliding form method, and at the same time, it is possible to construct a steel plate concrete silo using a steel plate cylindrical body. Since there is no problem with the erection of 1, a highly airtight iron plate concrete silo with no pouring joints can be constructed extremely efficiently and at low cost.

Furthermore, since the height of concrete pouring is always 10 to 20 cm, high-quality concrete with little slump can be poured, and compaction work using a vibrator is easy, so a highly durable concrete wall can be obtained.

Additionally, compared to the conventional large frame construction method, the construction period can be significantly shortened and labor costs can be leveled out.

[Brief explanation of drawings]

FIGS. 1A, B, and C are a perspective view of a module steel plate, and a plan view and a perspective view of a steel plate cylindrical body assembled using the module steel plate. Fig. 2 is an elevational view showing the construction state of the iron plate cylinder, Fig. 3 A-D is a two-step drawing of the construction method of this invention, Fig. t54 and Fig. 5 are a plan view and a front view of the slide device, FIG. 6 is a plan view of the constructed silo, FIG. 7 is an elevation view for explaining the second embodiment,
FIG. 8 is a process diagram of the process, and FIG. 9 is a plan view of a jack holder installed at the upper end of the iron plate cylindrical structure.

Claims (1)

[Claims] [1] (a) The iron plate cylinder (1) is assembled on the ground to a size that can be lifted, and the iron plate cylinder (1) is slid in the axial direction of the outer peripheral surface of the iron plate cylinder (1). a step of assembling the guide (2); (b) a step of lifting and erecting the iron plate cylinder (1); and (c) installing a slide device (3) that ascends along the slide guide (2). (d) raising the slide device (3) and pouring concrete (10) between the weir plate (4) supported by the slide device (3) and the steel plate cylindrical structure (1); A method for constructing a steel plate concrete silo, characterized by comprising the steps of setting up a steel plate concrete silo.