JP4705939B2 - Steel plate concrete structure and steel plate concrete construction method - Google Patents

Description

  The present invention relates to a steel plate concrete structure and a steel plate concrete construction method, and more particularly to a steel plate concrete structure floor structure.

  In recent years, the building structure of a nuclear power plant can be constructed by bringing a member called an SC panel manufactured at the factory into the site and installing it. The amount of construction work and the construction period are reduced compared to the reinforced concrete structure (RC structure). Therefore, examples of adopting a steel plate concrete structure (SC structure) are increasing.

  Conventionally, as a floor structure of this kind of steel plate concrete building, what is shown in Drawing 6 and Drawing 7 is proposed (for example, refer to patent documents 1).

  6 shows one side of a steel plate 102 in which an opening 101 for penetrating a pipe, an air conditioning duct, or a cable tray (hereinafter collectively referred to as “piping etc.” in the present specification) is opened. An SC panel 105 formed by welding the stud 103 and the joist 104 in a required arrangement, and a sleeve 107 having an outer diameter smaller than the diameter of the opening 101 and a flange 106 protruding outward at a predetermined position on the outer surface. And are used. In this floor structure, the SC panel 105 carried in the field is laid between the required columns or beams with the stud 103 and joists 104 facing upward, and then a sleeve 107 is inserted into the opening 101 and the upper surface of the steel plate 102 is placed. 106 abuts and the outer periphery of the flange 106 is welded to the steel plate 102. Then, after a required pipe or the like is disposed through the opening 101 and the sleeve 107, the concrete 108 is placed on the upper surface of the steel plate 102 excluding the inside of the sleeve 107.

On the other hand, what is shown in FIG. 7 is characterized in that the SC panel 105 in which the sleeve 107 is welded concentrically with the opening 101 of the steel plate 102 is manufactured at the factory stage. Welding of studs 103 and joists 104 to the steel plate 102, laying of SC panels 105 between columns or beams after being brought into the field, arrangement of piping and the like through the opening 101 and the sleeve 107, and the upper surface of the steel plate 102 The concrete 108 is placed on the same as in the example of FIG.
JP 2006-78240 A

  None of the steel plate concrete structures according to the above-mentioned known examples have the openings 101 filled with holes. Therefore, as they are, they are used as a floor structure of a practical nuclear power plant building having water tightness, air tightness, radiation shielding properties, and the like. I can't.

  By the way, as for the hole closing of the opening 101, a ring-shaped hole closing stopper having a through hole such as a pipe is installed at the bottom of the inner surface of the sleeve 107 concentrically with the opening 101. The space formed by the outer surface and the upper surface of the hole closing stopper is filled with a required hole closing filler selected from, for example, mortar, lead hair, or silicon, but passes through the sleeve 107. Since the piping and the like to be used are different in the amount of pipe and the penetration position for each sleeve 107 provided on each floor, the installation of the hole closing stopper for the sleeve 107 is performed by laying the SC panel 105 between the required columns or beams, And after welding the sleeve 107 to the required position of the SC panel 105 (in the case of the steel plate concrete structure of FIG. 6), the sleeve 107 is placed at the required position. After the contacted SC panel 105 is laid between the required columns or beams (in the case of the steel plate concrete structure in FIG. 7), it is performed on site according to the amount and position of piping such as piping penetrating the sleeve 107. There is a need. Therefore, when installing the hole closing stopper, it is necessary to work with a scaffold under the floor of each floor, and there is a problem that installation work of the hole closing stopper requires a great deal of labor.

  Further, the steel plate concrete structure of FIG. 6 has a problem that the manufacturing cost of the sleeve 107 is increased because the flange 106 is an essential component.

  The present invention has been made to eliminate such deficiencies in the prior art, and its object is to provide a steel plate concrete structure that is water-tight, air-tight, or radiation-shielding and that can be easily implemented at low cost. There is to do.

  In order to solve the problems of the prior art, the present invention provides a steel plate having an opening, a sleeve disposed concentrically with the opening and welded to the upper surface of the steel plate, and an upper surface of the steel plate excluding the inside of the sleeve. In the steel plate concrete structure composed of the concrete to be installed and the pipe passing through the opening and the sleeve, the sleeve has an inner diameter larger than the diameter of the opening, and no wrinkles are formed on the inner surface and the outer surface. In addition, a stopper for hole finishing having through holes such as the pipes is installed on the projecting portion of the steel sheet projecting into the sleeve, and the inner surface of the sleeve, the outer surface of the pipe and the stopper for hole finishing are installed. And filling a hole-filling material into a space formed by the upper surface.

  As described above, when a simple cylindrical sleeve having no collar is used, the manufacturing cost of the sleeve can be reduced as compared with the case where a sleeve having a collar as an essential component is used. Moreover, if a sleeve having an inner diameter larger than the diameter of the opening formed in the steel plate is used and this sleeve is installed concentrically with the opening, a part of the steel plate can be projected to the bottom of the sleeve. Since it is possible to install a hole stop stopper inserted into the sleeve from the upper surface side of the steel plate, there is no need to assemble a scaffold for installing the hole stop stopper under the floor, and the cost of installing the hole stop stopper Can be reduced. Furthermore, since the hole-filling filler is filled in the internal space of the sleeve, a practical floor structure having water tightness, air tightness, radiation shielding properties and the like can be obtained.

  The present invention secondly, in the first steel plate concrete structure, as the hole closing stopper, composed of two half ring-shaped stopper members, when the straight portions of these two stopper members are abutted, A ring-shaped member having an outer diameter that can be inserted into the sleeve and an inner diameter that can penetrate the pipe or the like is used.

  The hole closing stopper of this configuration has a two-part structure, so that it can be inserted into the sleeve after piping and the like, and the lower surface abuts against a part of the steel plate that protrudes from the bottom of the sleeve. By doing so, the opening established in the steel plate can be closed. Moreover, since the hole closing stopper is not fixed to the sleeve, it can be implemented at a low cost. Since the hole closing filler is filled into the sleeve from the upper end of the sleeve, the hole closing filler can be prevented from flowing out without fixing the hole closing stopper to the sleeve. Absent.

  Thirdly, in the first steel plate concrete structure according to the present invention, the hole finishing stopper is formed in a ring shape having an outer diameter that can be inserted into the sleeve and an inner diameter that can penetrate the pipe and the like. In the radial direction, a slit formed from the outer peripheral end to the inner peripheral end is used.

  The hole closing stopper of this configuration can be attached to a pipe or the like by elastically deforming the left and right portions in opposite directions via slits. In addition, by removing the force applied to the left and right parts, the hole closing stopper can be returned to the specified ring shape, so that it can be inserted into the sleeve and the opening opened in the steel plate is blocked. Can do. Moreover, since the hole closing stopper is not fixed to the sleeve, it can be implemented at a low cost.

  On the other hand, regarding the steel plate concrete construction method, firstly, a step of laying a steel plate having an opening between required columns or beams, an inner diameter is larger than the diameter of the opening, and ridges are formed on the inner surface and the outer surface. A sleeve that is not concentric with the opening and welded to the upper surface of the steel plate, a step of placing concrete on the upper surface of the steel plate excluding the inside of the sleeve, a pipe that penetrates the sleeve and the opening, and the like A step of installing a hole closing stopper having a through-hole such as the pipe on the projecting portion of the steel sheet projecting into the sleeve, and the inner surface of the sleeve and the pipe, etc. And a step of filling a hole closing filler into a space formed by the outer surface and the upper surface of the hole closing stopper.

  Second, a step of welding a sleeve having an inner diameter larger than the diameter of the opening and having no wrinkles formed on the inner surface and the outer surface of the steel plate having an opening concentrically with the opening; and Laying the steel plate between required columns or beams with the sleeve facing upward, placing concrete on the upper surface of the steel plate except inside the sleeve, and piping through the sleeve and the opening And the like, a step of installing a hole closing stopper having a through-hole such as the pipe on the projecting portion of the steel plate projecting into the sleeve, an inner surface of the sleeve, the pipe and the like And a step of filling a hole closing filler into a space formed by the outer surface of the hole and the upper surface of the hole closing stopper.

  By applying these methods, it is possible to reduce the manufacturing cost of the sleeve and the installation cost of the stopper for closing the hole in the sleeve, so that a steel plate concrete structure having water tightness, air tightness or radiation shielding properties can be easily and inexpensively implemented. Can do.

  The steel plate concrete structure and the steel plate concrete construction method of the present invention have an opening formed in a steel plate with a simple cylindrical sleeve having an inner diameter larger than the diameter of the opening formed in the steel plate and no wrinkles formed on the inner surface and the outer surface. In addition to installing concentric to the bottom of the sleeve, a stopper for hole insertion inserted into the sleeve from the upper surface side of the steel plate is installed at the protruding portion of the steel plate protruding from the bottom of the sleeve. The manufacturing cost of the sleeve can be reduced as compared with the case, and a scaffold for installing the hole closing stopper is not necessary, and the installation cost of the hole closing stopper can be reduced. Therefore, the steel plate concrete structure provided with water tightness, air tightness, or radiation shielding can be implemented easily and inexpensively.

  Hereinafter, embodiments of a steel plate concrete structure and a steel plate concrete method according to the present invention will be described with reference to FIGS. 1 to 5. 1 is a cross-sectional view of a main part of a steel plate concrete structure according to the embodiment, FIG. 2 is a plan view showing a first example of a hole closing stopper according to the embodiment, and FIG. 3 is a plan view of the hole closing stopper according to the embodiment. FIG. 4 is a perspective cross-sectional view showing a state of the steel plate concrete structure according to the embodiment when the concrete is placed, and FIG. 5 is a stopper for hole finishing of the steel plate concrete structure according to the embodiment. It is a perspective sectional view showing the state at the time of installation.

  As shown in FIG. 1, a steel plate concrete structure of this example includes a steel plate 2 having an opening 1, a cylindrical sleeve 3 that is arranged concentrically with the opening 1 and is welded to the upper surface of the steel plate 1, the opening 1, and A pipe 4 passing through the sleeve 3, a hole closing stopper 5 installed at the bottom of the sleeve 3, a concrete 6 placed on the upper surface of the steel plate 2 excluding the inside of the sleeve 3, and the inner surface of the sleeve 3 and the pipe The hole finishing filler 7 is mainly composed of a space formed by the outer surface of the equality 4 and the upper surface of the hole finishing stopper 5.

  The steel plate 2 constitutes a floor having a steel plate concrete structure together with concrete 6 placed on the upper surface thereof, and a steel plate having a thickness of about 6 mm is usually used for a building of a nuclear power plant. The diameter of the opening 1 opened in the steel plate 2 is determined in consideration of the total amount of pipes 4 disposed through the opening 1. Note that the stud 103 and joists 104 shown in FIGS. 6 and 7 may be provided on the upper surface of the steel plate 2 as necessary.

  The sleeve 3 secures an arrangement passage for the pipes 4 and the like after the concrete 6 is placed. The sleeve 3 has the same type of steel material as that of the steel plate 2 and has a simple cylindrical or square cylindrical shape having no flaws on the inner surface and the outer surface. Formed. The inner diameter is formed larger than the diameter of the opening 1 opened in the steel plate 2, and the total length is formed larger than the thickness of the concrete 6 placed on the upper surface of the steel plate 2. The sleeve 3 is disposed concentrically with the opening 1, and one end is welded to the upper surface of the steel plate 2. Therefore, as shown in FIG. 1, a protruding portion 8 having a width corresponding to ½ of the difference between the inner diameter of the sleeve 3 and the diameter of the opening 1 is projected from the bottom of the sleeve 3. The width of the overhang portion 8 is set to a size that allows the hole closing stopper 5 to be stably placed. In addition, the code | symbol 9 in a figure has shown the welding part of the steel plate 2 and the sleeve 3. FIG.

  As shown in FIGS. 2 and 3, the hole closing stopper 5 is formed in a shape that can be set in the sleeve 3 through which the pipe 4 or the like is penetrated.

  As shown in FIG. 2 (a), the hole closing stopper 5 shown in FIG. 2 is composed of two semi-ring shaped stopper members 5a and 5b, and abuts the straight portions of the two stopper members 5a and 5b. Thus, as shown in FIG. 2 (b), a ring shape having an outer diameter that can be inserted into the sleeve 3 and an inner diameter that can penetrate the piping 4 or the like is obtained. In the example of FIGS. 2A and 2B, when the straight portions of the two stopper members 5a and 5b are brought into contact with each other, a through hole 10 for penetrating the pipe 4 or the like is formed in the center portion thereof. Although the shape of each stopper member 5a, 5b is formed as described above, if the position of the piping 4 passing through the sleeve 3 is not at the center of the sleeve 3, the interference between the piping 4 and the hole closing stopper 5 In order to prevent this, as shown in FIG. 2C, a through hole 10 is used that is eccentric from the center of the hole closing stopper 5.

  Further, as shown in FIG. 3A, the hole closing stopper 5 shown in FIG. 3 is formed in a ring shape having an outer diameter that can be inserted into the sleeve 3 and an inner diameter that can penetrate the piping 4 or the like. In the radial direction, a slit 5c is formed from the outer peripheral end to the inner peripheral end. As shown in FIG. 3 (b), the hole closing stopper 5 is elastically deformed in opposite directions through slits 5c to form a gap through which the pipe 4 or the like can be inserted. Attach to 4. After mounting on the pipe 4 or the like, the hole closing stopper 5 is returned to a ring shape by removing the force applied to the hole closing stopper 5 and is brought into contact with the upper surface of the overhanging portion 8 protruding into the sleeve 5. . When the penetrating position of the pipe 4 or the like penetrating through the sleeve 3 is not at the center of the sleeve 3, as shown in FIG. 3 (c), the one in which the through hole 10 is formed at an eccentric position is used.

  The hole finishing filler 7 gives the floor structure watertightness, airtightness, radiation shielding, etc., and depending on the purpose, for example, a required material selected from mortar, lead hair or silicon is used. Used.

  Since the steel plate concrete structure of this example uses the simple cylindrical sleeve 3 that does not have the flange, the manufacturing cost of the sleeve 3 can be reduced compared to the case where the sleeve 3 having the flange as an essential component is used. Further, since the sleeve 3 is installed concentrically with respect to the opening 1 by using the sleeve 3 whose inner diameter is larger than the diameter of the opening 1 provided in the steel plate 2, an overhanging portion which is a part of the steel plate is provided at the bottom of the sleeve 3. 8 can be overhanged, and the hole closing stopper 5 inserted into the sleeve 3 from the upper surface side of the steel plate can be installed in the overhanging portion 8, so that the hole closing stopper 5 can be installed. There is no need to assemble a scaffold under the floor, and the installation cost of the hole finishing stopper 5 can be reduced. Therefore, a required steel plate concrete structure can be implemented easily and inexpensively. Furthermore, since the hole finishing filler 7 is filled in the internal space of the sleeve 3, a practical floor structure having water tightness, air tightness, radiation shielding properties, etc. can be obtained.

  Next, an embodiment of a steel plate concrete method according to the present invention will be described.

  First, a steel plate 2 having an opening 1 manufactured in a factory is laid between necessary columns or beams installed on site. The sleeve 3 can be welded to the steel plate 2 at a factory, or can be welded on site after the steel plate 2 is laid between required columns or beams. Next, as shown in FIG. 4, concrete 6 is placed on the upper surface of the steel plate 2 excluding the inside of the sleeve 3. Next, as shown in FIG. 5, after the required piping and the like 4 are disposed through the opening 1 and the sleeve 3, the hole closing stopper 5 is accommodated in the sleeve 3 from above the steel plate 2, and the lower surface thereof is It is set on the overhanging portion 8 of the steel plate 2 overhanging at the bottom of the sleeve 3. As the hole closing stopper 5, the one shown in FIG. 2 or the one shown in FIG. 3 can be used. Finally, the hole finishing filler 7 is filled in the space formed by the inner surface of the sleeve 3, the outer surface of the pipe 4 and the like, and the upper surface of the hole stopping stopper 5 to obtain the steel plate concrete structure shown in FIG. .

  Since the steel plate concrete construction method of this example can reduce the manufacturing cost of the sleeve 3 and the installation cost of the stopper 5 for closing the hole for the sleeve 3, a steel plate concrete structure having water tightness, air tightness or radiation shielding property can be easily and inexpensively. Can be implemented.

It is principal part sectional drawing of the steel plate concrete structure which concerns on embodiment. It is a top view which shows the 1st example of the stopper for hole completion which concerns on embodiment. It is the top view and perspective view which show the 2nd example of the stopper for hole closing which concerns on embodiment. It is a perspective sectional view showing the state at the time of concrete placement of the steel plate concrete structure concerning an embodiment. It is a perspective sectional view showing the state at the time of stopper installation for hole finishing of the steel plate concrete structure concerning an embodiment. It is principal part sectional drawing of the steel plate concrete structure which concerns on a 1st known example. It is principal part sectional drawing of the steel plate concrete structure which concerns on a 2nd well-known example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Opening 2 Steel plate 3 Sleeve 4 Piping etc. 5 Hole closing stopper 6 Concrete 7 Hole closing filling material 8 Overhang part 9 Welding part 10 Through hole

Claims (5)

A steel plate having an opening; a sleeve disposed concentrically with the opening; welded to the upper surface of the steel plate; concrete placed on the upper surface of the steel plate excluding the inside of the sleeve; and penetrating the opening and the sleeve. In steel plate concrete structure consisting of piping, etc.
As the sleeve, one having an inner diameter larger than the diameter of the opening and having no ridges formed on the inner surface and the outer surface, and penetrating the pipe or the like on the projecting portion of the steel sheet projecting into the sleeve is used. A steel plate concrete characterized in that a hole closing stopper having holes is installed, and a hole closing filler is filled in a space constituted by the inner surface of these sleeves, the outer surface of the pipe and the like, and the upper surface of the hole closing stopper. Structure.   The hole closing stopper is composed of two semi-ring shaped stopper members. When the straight portions of these two stopper members are brought into contact with each other, an outer diameter that can be inserted into the sleeve and an inner diameter that can penetrate the pipe or the like. The steel plate concrete structure according to claim 1, wherein the steel plate concrete structure is used.   The hole closing stopper is formed in a ring shape having an outer diameter that can be inserted into the sleeve and an inner diameter that can penetrate the pipe, and a slit is formed in the radial direction from the outer peripheral end to the inner peripheral end. The steel plate concrete structure according to claim 1, wherein the steel plate concrete structure is used.   A step of laying a steel plate having an opening between required columns or beams, and a sleeve having an inner diameter larger than the diameter of the opening and having no ridges formed on the inner surface and the outer surface thereof is disposed concentrically with the opening. Welding to the upper surface of the steel plate, placing concrete on the upper surface of the steel plate excluding the inside of the sleeve, arranging a pipe or the like through the sleeve and the opening, and tensioning in the sleeve A step of installing a hole finishing stopper having a through-hole such as the pipe on the protruding portion of the steel sheet, and an inner surface of the sleeve, an outer surface of the pipe, and an upper surface of the hole finishing stopper And a step of filling a hole finishing filler in the space to be formed. Placing a sleeve having an inner diameter larger than the diameter of the opening and not having wrinkles on the inner surface and the outer surface of one side of the steel plate having the opening, concentrically with the opening, and facing the sleeve upward Laying the steel plate between the required columns or beams, placing the concrete on the upper surface of the steel plate except inside the sleeve, and arranging piping and the like through the sleeve and the opening And a step of installing a hole finishing stopper having a through hole such as the pipe on the projecting portion of the steel sheet projecting into the sleeve, an inner surface of the sleeve, an outer surface of the pipe, and the hole finishing. And a step of filling a hole finishing filler in a space formed by the upper surface of the stopper for a steel plate.

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