KR-20260062550-A - MODULE TYPE FORMWORK UNIT APPLIED TO CONSTRUCTING PERMANENT FORMWROK

KR20260062550AKR 20260062550 AKR20260062550 AKR 20260062550AKR-20260062550-A

Abstract

The present invention relates to a modular formwork unit applied to the construction of permanent formwork and a method for manufacturing the same. A modular formwork unit according to an embodiment of the present invention is characterized by comprising: a concrete body in the shape of a square plate having a certain thickness; a plurality of shear connecting members, one side of which is embedded inside the concrete body and the other side of which protrudes outward from the plate surface of one side of the concrete body; and a shielding member made of a material that shields EMP, which is embedded inside the concrete body along the direction of the plate surface of the concrete body. Through this, the risk of reduced fire resistance and corrosion can be eliminated.

Inventors

윤영수
최진석
이호진
진수영

Assignees

고려대학교 산학협력단

Dates

Publication Date: 20260507
Application Date: 20241029

Claims (9)

In a modular formwork unit applied to the construction of permanent formwork, A concrete body in the shape of a square plate having a certain thickness; A plurality of shear connecting members, one side of which is embedded inside the concrete body and the other side of which protrudes outward from the plate surface of one side of the concrete body; A modular formwork unit applied to the construction of a permanent formwork, characterized by including a shielding member made of a material that shields EMP, which is embedded inside the concrete body along the direction of the plate surface of the concrete body.
In paragraph 1, A modular formwork unit applied to the construction of a permanent formwork, characterized in that the above-mentioned concrete body is fiber-reinforced concrete including ultra-high performance fiber-reinforced concrete.
In paragraph 1, The above shear connecting member is A first connecting part embedded inside the above-mentioned concrete body, and It includes a second connecting part, one side of which extends from the first connecting part and the other side of which protrudes outward from one side plate surface of the concrete body; A modular formwork unit applied to the construction of a permanent formwork, characterized in that the width of the first connecting part in the direction of the plate surface of the concrete body is greater than the width of the second connecting part.
In paragraph 1, A modular formwork unit applied to the construction of a permanent formwork, characterized in that the shielding member is made of a metal material and has a grid shape.
A method for manufacturing a modular formwork unit applied to the construction of a permanent formwork, A step of providing an upwardly open base formwork; A step of arranging a plurality of shear connecting members on the bottom surface of the base formwork so as to be spaced apart from each other, wherein one side of the shear connecting member rests on the bottom surface and the other side protrudes upward; A step of pouring concrete into the base formwork in the first step, such that the other side of the shear connecting member protrudes outward; and A step of placing a shielding member made of a material that shields against EMP on the surface of the concrete poured in the first step; A step of pouring concrete a second time into the base formwork, wherein the shielding member is embedded inside the concrete and the other side of the shear connecting member protrudes to the outside; A method for manufacturing a modular formwork unit applied to the construction of a permanent formwork, characterized by including the step of removing the base formwork after the concrete poured in the first and second stages has cured.
In paragraph 5, A method for manufacturing a modular formwork unit applied to the construction of a permanent formwork, characterized in that the concrete poured in the first and second stages is fiber-reinforced concrete including ultra-high performance fiber-reinforced concrete.
In paragraph 5, The above shear connecting member is A first connecting part that rests on the bottom surface of the above-mentioned base formwork, and It includes a second connecting part, one side of which extends upward from the first connecting part and the other side of which protrudes outward when the concrete is poured secondarily; A method for manufacturing a modular formwork unit applied to the construction of a permanent formwork, characterized in that the width of the first connecting part is greater than the width of the second connecting part.
In paragraph 5, A method for manufacturing a modular formwork unit applied to the construction of a permanent formwork, characterized in that the shielding member is made of a metal material and has a grid shape.
In paragraph 5, Curing of the above base formwork before removal is performed in the air; A method for manufacturing a modular formwork unit applied to the construction of a permanent formwork, characterized by further including a step of curing the concrete poured in the first and second stages under high-temperature steam conditions after removing the base formwork.

Description

Modular formwork unit applied to constructing permanent formwork and method of manufacturing the same The present invention relates to a modular formwork unit and a method for manufacturing the same, and more specifically, to a modular formwork unit and a method for manufacturing the same applied to the construction of permanent formwork. Along with the growth of the global population, the development of advanced industries such as AI is rapidly increasing global electricity demand. Consequently, there is a growing need to reduce energy production costs, and at the same time, the importance of nuclear energy as an eco-friendly power source for achieving carbon neutrality is gaining attention. Consequently, demand for Small Modular Reactors (SMRs) is increasing due to their advantages, such as the ability to construct them in regions or countries where it is difficult to build large-scale nuclear power plants, and the potential to reduce construction time and costs through their compact modular design. Due to these advantages of small modular reactors, competition among nations to secure technological competitiveness and preempt market leadership in the SMR construction sector has recently intensified. In the case of such small modular reactors, there are instances where concrete structures are constructed without removing the formwork, and the concrete structures are constructed together with the formwork. Figure 1 is a drawing showing an example of a conventional steel plate concrete structure. As shown in FIG. 1, a steel plate concrete structure is formed by forming a steel bar structure inside a formwork (2) made of steel plate, and then pouring and curing concrete (2). Meanwhile, since the temperature of equipment in nuclear power plants rises due to the heat generated during the nuclear reaction process, a continuous supply of cooling water is required to effectively control it. Consequently, nuclear power plants are often constructed near the coast to facilitate the supply of cooling water; however, this site selection can lead to the problem of structures being exposed to saline environments for extended periods due to the salinity of seawater. Material degradation caused by salt damage can reduce structural integrity and negatively impact the safety and reliability of nuclear power plants. In Korea, there was a case in 2017 where corrosion caused by salt and moisture was discovered inside the steel plates constituting the nuclear power plant containment structure, and it was reported that this could have a negative impact on the structural integrity and radiation shielding of the nuclear power plant structure. As such, when steel plate concrete (SC) structures are applied to nuclear power plant structures located on the coast, continuous maintenance is required due to the risk of corrosion. Furthermore, since structural safety can be threatened by weakened adhesion caused by corrosion between the steel plate and concrete interface in a salty environment, technical measures to minimize material deterioration in a salty environment are essential. In particular, in the case of steel plate concrete structures, when the steel plates are directly exposed to high temperatures caused by fire or other factors, a problem may arise where structural performance deteriorates rapidly due to low fire resistance. Therefore, there is an increasing need to ensure long-term durability through corrosion prevention and monitoring of the deterioration status of structures. Furthermore, nuclear power plants need to secure comprehensive protection capabilities against various threats, including not only natural disasters such as earthquakes but also fires, physical attacks, and particularly Electromagnetic Pulse (EMP) attacks on the electronic equipment used for nuclear system control, which is actively utilized today. However, it is known that domestic nuclear power plants are not adequately prepared for this. FIG. 1 is a drawing showing an example of a conventional steel plate concrete structure, and FIG. 2 is a drawing showing an example of a concrete structure to which a modular formwork unit according to an embodiment of the present invention is applied, and FIG. 3 is a cross-sectional view along line AA of FIG. 2, and FIG. 4 is a drawing for explaining a method of manufacturing a modular formwork unit according to an embodiment of the present invention, and FIGS. 5 and 6 are drawings for explaining the manufacturing process of a modular formwork unit according to an embodiment of the present invention, and FIG. 7 is a drawing illustrating the construction process of a concrete structure using a modular formwork unit according to an embodiment of the present invention. The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to