JPS5858370A - Execution of lining tank - 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] The present invention relates to a construction method for a lining tank, and in particular, a panel in which a lining plate is welded in advance to a base hardware that serves as a backing metal for the lining plate is assembled and hung at the installation location, and concrete is poured. The present invention relates to a lining tank construction method for forming a lining tank.

Metal-lined lining tanks are widely used in nuclear couplants and their auxiliary equipment, chemical plants, and the like. In the present invention, a stainless steel lined tank for storing radioactive waste from a nuclear power plant facility will be explained as an example.

This stainless steel lined tank for storing radioactive waste is used to store radioactive waste released from nuclear power plants and to attenuate the radioactivity, but it has not been used conventionally due to its high volumetric efficiency. It is now being adopted to replace the old tank.

Conventionally, the method of constructing a lining tank for radioactive waste has been to install a formwork that integrates base hardware and plywood as a backing for the lining plate, pour concrete, remove the plywood after hardening, and weld the lining plate. However, this method had the drawback of requiring a long construction period.

Recently, there has been a desire to shorten the construction period of nuclear power plants, and in order to do so, it is necessary to change the lining tank to a plain layer. In this construction method, a panel is made in advance by welding the lining plate to the base hardware that serves as the backing for the lining plate, and then the panels are assembled on-site, suspended at the installation site, and concrete is poured. to form a lining tank. This construction method is more advantageous than conventional construction methods in terms of quality control since it mainly involves factory welding, and also has the advantage of shortening the on-site construction period. However, since the lining tank itself is used as a formwork for concrete, there is a drawback in that a large number of base hardware are required for reinforcement in order to prevent deformation due to lateral pressure during concrete IJ-casting.

Another drawback is that it is difficult to maintain dimensional tolerances when the lining tank becomes large when assembling the panels together.

Furthermore, after assembling the sides of the lining tank into a single large box-shaped block, when hoisting it to the installation location, it is necessary to use a take-up or the like to prevent the lining tank from being deformed or damaged.

The object of the present invention is to install reinforcing beams made of shaped steel, plates, etc. on the inner surface of the lining tank when assembling panels, when suspending a large panel plotter with integrated panels, and when pouring concrete after installing large panel blocks. Our goal is to provide inexpensive, high-quality lining tanks.

The present invention eliminates the increase in the amount of base material due to the prevention of deformation due to lateral pressure during concrete IJ-1 pouring in conventional construction methods, and also serves as a gauge during assembly and prevents deformation during hoisting. By using reinforcing beams made of shaped steel, plates, etc., the cost of the lining tank can be reduced and the quality improved.

FIG. 1 shows a plan view of a reinforcing beam used in the lining tank construction method according to the present invention, and FIG. 2 shows a front view of the reinforcing beam. The reinforcing beam is approximately the same size as the inner surface of the lining tank, but is slightly smaller, and its size can be finely adjusted using a dimension adjustment device. FIG. 3 shows a detailed diagram of the dimension adjustment device. The size adjustment device 2 is capable of finely adjusting the size using bolts 5 and nuts 6 welded to the sub beam 4 welded to the king beam 3 of the reinforcing beam 1. If the reinforcing beam 1 comes into direct contact with the lining plate 9, it may be damaged, so it is preferable to sandwich a plywood plate 7 between them. Further, a temporary fitting 8 is welded to the lining plate 9 to prevent the reinforcing beam 1 from falling. This metal fitting is removed after use.
``Even if the lining is made of stainless steel, carbon steel is sufficient as the material for the reinforcing beam, as long as it is sufficiently cured by painting, etc.

Examples of the use of reinforcing beams are shown in Figures 3-5.

FIG. 4 shows an example in which the reinforcing beam 1 is used when assembling panels to make a large panel block 10. By using the reinforcing beam 1 as a gauge, accurate dimensions can be achieved. In particular, if the reinforcing beam 1 is lifted and set, the dimensions at the upper part of the lining tank can be made the same as at the lower part.

This allows the panel assembly period to be shortened.

FIG. 5 shows an example in which the reinforcing beam 1 is used as reinforcement when lifting a large panel block 1°. When lifting such a box, the wire lobes apply a crushing force to the box, so the box is often hung from a ceiling, but if the reinforcing beam 1 is used, deformation of the large panel block 1o can be sufficiently suppressed.

FIG. 6 shows an example in which the reinforcing beam 1 is used as internal reinforcement of a large panel block 1° against concrete lateral pressure during concrete pouring. By adopting the reinforcing beam 1, deformation was prevented by the rigidity of the base hardware that was conventionally welded to the lining plate, but since deformation can be prevented by the strength against compression of the reinforcement beam 1, the amount of base hardware is reduced. becomes possible. The mounting bracket for mounting the reinforcing beam 1 on the inner surface of the large panel block may be attached in accordance with the concrete placement depth t.

As mentioned above, by using one reinforcing beam with the same size as the inner surface of the lining tank and equipped with a dimension adjustment device,
The quality of the lining tank can be maintained when assembling panels, when suspending large panel blocks with integrated panels, and when pouring concrete after installing large panel blocks, reducing construction time.
Costs can be lowered by reducing the amount of base material.

According to the present invention, by using a reinforcing beam made of shaped steel, plate, etc., and several metal fittings on the inner surface of the dog panel block for attaching the reinforcing beam, the lining tank is provided when assembling the panel and when hanging the dog panel block. It is easy to improve dimensional accuracy and shorten the construction period.
- By using reinforcing beams for internal reinforcement during pouring, it is possible to reduce the amount of base hardware, which has the effect of providing a high-quality lining tank at low cost.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the reinforcing beam according to the present invention, Fig. 2 is a front view thereof, Fig. 3 is a detailed view of the dimension adjustment device of Fig. 2 and the mounting bracket attached to the lining plate, Fig. 4, FIG. 5 and FIG. 6 are explanatory diagrams of examples of use of the reinforcing beam according to the present invention. 1...Reinforcement beam, 2...Dimension adjustment device, 3...Main beam, 4...Sub-beam, 5...Bolt, 6...Nut, 7...Plywood board, 8...Additional metal fittings , 9... Lining board, 10... Large Hanel block. Agent Patent Attorney Akio Takahashi No. 2 / No. 2 No. 3 No. 4 No. 0

Claims (1)

[Claims] ■ In a lining tank construction method in which a panel is welded in advance to a base hardware that serves as a backing metal for the lining plate, the panel is assembled and hung at the installation site, and concrete is poured to form the panel. During assembly, when suspending a large panel block with integrated panels, and when pouring concrete after installing a large panel block, reinforcing beams made of shaped steel, plates, etc. are attached to the inner surface of the large panel block, and the reinforcing beams are attached to the inner surface of the large panel block. A lining tank construction method characterized by using metal fittings attached to the inner surface of a large panel block for installation. 2. The lining tank construction method according to claim 1, characterized in that the reinforcing beam has a length adjustment device consisting of a bolt and an oak.