Unit structure and unit structure construction method

Abstract

To provide a construction method of a unit structure with excellent workability.SOLUTION: A construction method of a unit structure 100 in which a plurality of anchor bolt attaching holes 12d are formed in a lower part and a plurality of cylindrical jack insertion portions 12e projecting downward from a lower surface are provided, includes: a unit structure placing step S5 of hanging up the unit structure 100 and then lowering it, and inserting an insertion portion 302 of a jack 300 arranged on a base portion 200 into the jack insertion portions 12e, to place the unit structure 100 on the jack 300; an anchor bolt attaching step S9 of attaching an anchor bolt 401 to the anchor bolt attaching hole 12d; a formwork forming step S11 of forming a formwork 500 surrounding a lower part of the unit structure 100 on the base portion 200; and a foundation forming step S12 of pouring concrete into the formwork 500 to form a foundation.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a unit structure and a method for constructing a unit structure. [Background technology]

[0002] Conventionally, there have been unit structures manufactured in factories, as shown in Patent Document 1. Such unit structures are installed and constructed on a foundation made of concrete. A plurality of anchor bolts for fixing the unit structure protrude from the upper surface of the foundation. A plurality of anchor holes through which the anchor bolts are inserted are formed in the lower part of the unit structure. A lower nut is attached to each anchor bolt.

[0003] When installing a unit structure on a foundation, the unit structure is lifted with a crane, and with the anchor bolts and anchor holes horizontally aligned, the unit structure is lowered, the anchor bolts are inserted into the anchor holes, and the bottom of the unit structure is placed on the lower nuts attached to the anchor bolts. Next, the multiple lower nuts are rotated to adjust the unit structure so that it is level with the ground and foundation. Next, upper nuts are screwed onto the multiple anchor bolts to secure the unit structure to the anchor bolts. Next, mortar is packed into the gap between the foundation and the bottom of the unit structure. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2019-173402 Summary of the Invention [Problem to be solved by the invention]

[0005] Installing a unit structure on a foundation using conventional methods had the following problems: To insert anchor bolts into the anchor holes, the horizontal positions of all anchor bolts and their corresponding anchor holes had to be aligned, but the clearance between the anchor bolts and anchor holes was only 2 mm or less, making it difficult to align the horizontal positions of all anchor bolts and their corresponding anchor holes. The reason for setting the clearance at 2 mm or less is to restrict the horizontal positions of the anchor bolts and anchor holes so that the anchor bolts can support the horizontal load applied to the unit structure.

[0006] Furthermore, when installing a unit structure, anchor bolts may be bent, which requires correcting the bend in the anchor bolt, a time-consuming process. If the horizontal position of the anchor bolt and anchor hole does not match, the anchor hole must be enlarged, which is also a time-consuming process. Furthermore, if the anchor hole is enlarged, the clearance between the anchor bolt and anchor hole increases, which requires recalculation of the strength.

[0007] Furthermore, forming the foundation requires a large number of steps, as it is necessary to arrange the inner and outer frames facing each other, attach support brackets to maintain the gap between the inner and outer frames, form a formwork, and then accurately position the anchor bolts in the specified positions within the formwork before pouring the concrete.Furthermore, when a unit structure requires a large number of anchor bolts for its structural strength, embedding the anchor bolts in the foundation concrete first and fitting them within the standard dimensions inevitably results in the anchors shifting due to vibrations during concrete pouring, making it extremely difficult to install the unit structure on the foundation.

[0008] In order to solve the above problems, an object of the present invention is to provide a unit structure with excellent workability and a method for constructing the unit structure. [Means for solving the problem]

[0009] In order to achieve the above objectives , Yu The knitted structure is The lower part is characterized by having a plurality of anchor bolt mounting holes formed therein and a plurality of cylindrical jack insertion portions protruding downward.

[0010] According to this method, a jack with a rod-shaped insertion portion is placed on the base portion, the unit structure is lifted up onto the base portion, the unit structure is then lowered, the insertion portion is inserted into the jack insertion portion, the unit structure is placed on the jack, anchor bolts are attached to the anchor bolt mounting holes, a formwork is formed on the base portion that surrounds the lower part of the unit structure, concrete is poured into the formwork to form a foundation, and the unit structure can be installed on the base portion.

[0011] Therefore, when installing a unit structure, it is not necessary to perform the conventional difficult task of moving the unit structure, which is a heavy object lifted up, horizontally and inserting anchor bolts installed in the foundation into anchor holes in the unit structure, but rather it is only necessary to move the jack horizontally and insert the insertion portion of the jack into the jack insertion portion of the unit structure, thereby improving workability.In addition, the anchor bolts can be installed in anchor bolt installation holes formed in the unit structure after the unit structure installation process, thereby improving workability.

[0012] The unit structure is A ceiling beam extending horizontally at the top is provided, The ceiling beam has connecting holes formed on its upper surface and a spacer plate attached thereto.

[0013] According to this, a connecting member having a communicating hole formed therein corresponding to the connecting hole of a horizontally adjacent ceiling beam is placed on the upper surface of the horizontally adjacent ceiling beam so as to bridge the ceiling beams of horizontally adjacent unit structures, and then the upper unit structure is lifted up and placed on the ceiling beam of the unit structure, and the communicating holes of the connecting member are aligned with the connecting holes and the lower connecting holes formed in the lower end of the upper unit structure, and bolts are inserted into the communicating holes, connecting holes, and lower connecting holes, and then nuts are screwed onto the bolts, thereby connecting horizontally and vertically adjacent unit structures to each other. Also, because spacer plates are attached to the upper surfaces of the ceiling beams, if the communicating holes of the connecting member are misaligned with the connecting holes and lower connecting holes, a tool such as a crowbar can be inserted between the ceiling beam of the unit structure and the floor beam of the upper unit structure to widen the gap between the ceiling beam of the unit structure and the floor beam of the upper unit structure, and the connecting member can be moved to align the communicating holes with the connecting holes and lower connecting holes.

[0014] In order to achieve the above object, 1 The unit structure construction method according to the invention described in A unit structure construction method for installing a pre-assembled unit structure on the ground, comprising: The unit structure has a lower portion formed with a plurality of anchor bolt mounting holes and a plurality of cylindrical jack insertion portions protruding downward, a base portion forming step (S2) of forming a base portion having a horizontal upper surface on the ground; a jack placing step (S4) of placing a jack having a rod-shaped insertion portion on the base portion; a unit structure placing step (S5) of lifting the unit structure onto the base portion, lowering the unit structure, inserting the insertion portion into the jack insertion portion, and placing the unit structure on the jack; a leveling step (S6) of leveling the unit structure by the jack; an anchor bolt installation step (S9) of installing an anchor bolt in the anchor bolt installation hole; a form forming step (S11) for forming a form (500) on the base portion to surround the lower portion of the unit structure; A foundation formation step (S12) of pouring concrete into the formwork to form a foundation; The present invention is characterized by having the following.

[0015] According to this method, when installing a unit structure, it is not necessary to perform the conventional difficult task of moving the unit structure, which is a heavy object lifted up, horizontally and inserting anchor bolts installed in the foundation into anchor holes in the unit structure. Instead, it is possible to simply move the jack horizontally and insert the jack's insertion portion into the jack insertion portion of the unit structure, thereby improving workability. In other words, since the jack is lightweight compared to the unit structure, which is a heavy object, it is easy to move the jack horizontally and insert the jack's insertion portion into the jack insertion portion of the unit structure. Furthermore, since the anchor bolts can be installed into anchor bolt installation holes formed in the unit structure after the unit structure installation process, workability is improved.

[0016] Claim 2 The invention described in claim 1 In the invention described in The method further includes a marking step (S3) of marking the base portion with marks (201a, 201b) indicating appropriate horizontal installation positions of the unit structure, The unit structure placing step is characterized in that the mark is used to align the unit structure with respect to the base portion in the horizontal direction.

[0017] This allows the unit structure to be accurately installed at a desired position on the base portion.

[0018] Claim 3 The invention described in claim 1 or 3 In the invention described in The method further comprises a jack fixing step (S8) of fixing the jack to the base portion before the formwork forming step.

[0019] According to this, by fixing the jack to the base portion, horizontal displacement of the unit structure attached to the jack relative to the base portion is suppressed.

[0020] Claim 4 The invention described in claim 1 ~ 3 In any one of the above-described inventions, The upper end of the unit structure has a ceiling beam (13) extending horizontally, A connecting hole (13d) is formed on the upper surface of the ceiling beam, The method further comprises a connecting step of placing connecting members (651, 652) having communicating holes (651a, 652a) formed therein corresponding to the connecting holes of horizontally adjacent ceiling beams on the upper surfaces of the horizontally adjacent ceiling beams so as to bridge the horizontally adjacent ceiling beams, aligning the communicating holes of each of the connecting members with the connecting holes formed in the horizontally adjacent ceiling beams, inserting bolts (655) into each of the communicating holes and connecting holes, and then screwing nuts (656) onto each of the bolts.

[0021] According to this, horizontally adjacent unit structures are connected by the connecting member, and horizontal displacement of the unit structures relative to the base portion is suppressed.

[0022] Claim 5 The invention described in claim 1 ~ 3 In any one of the above-described inventions, The upper end of the unit structure has a ceiling beam (13) extending horizontally, A connecting hole (13d) is formed on the upper surface of the ceiling beam, and a spacer plate (13e) is attached to the connecting hole (13d). The upper unit structure (150) placed on the unit structure has a floor beam (12) extending horizontally at its lower end, A lower connecting hole (12f) is formed on the lower surface of the floor beam, The method further comprises a connecting step of placing connecting members (651, 652) having communicating holes (651a, 652a) formed therein corresponding to the connecting holes of the horizontally adjacent ceiling beams on the upper surfaces of the horizontally adjacent ceiling beams so as to bridge the horizontally adjacent ceiling beams, then lifting up the upper unit structure and placing it on the ceiling beams of the unit structure, aligning the communicating holes of each of the connecting members with the connecting holes and the lower connecting holes, inserting bolts (655) into the communicating holes, connecting holes, and lower connecting holes, and then screwing nuts (656) onto each of the bolts.

[0023] According to this, horizontally adjacent unit structures are connected by the connecting members, and horizontal displacement of the unit structures relative to the base portion is suppressed. Also, the upper unit structure is connected to the unit structure. Furthermore, since a spacer plate is attached to the upper surface of the ceiling beam, if the positions of the communication holes of the connecting members are misaligned with the connection holes and the lower connection holes, a tool such as a crowbar can be inserted between the ceiling beam of the unit structure and the floor beam of the upper unit structure to widen the gap between the ceiling beam of the unit structure and the floor beam of the upper unit structure, and the connecting members can be moved to align the positions of the communication holes with the connection holes and the lower connection holes.

[0024] Claim 6 The invention described in claim 1 ~ 5 In the invention described in An outer wall (17) is attached to at least one surface of the unit structure before it is installed on the base portion, The first member (18, 21) has a bent portion (18d, 21d) whose end is bent at an acute angle, and the second member (19, 22) has an engaging portion (19c, 22c) whose end is formed in a U-shape. The method further includes an exterior wall joining process in which the second member is attached to the exterior wall of the other of the adjacent unit structures, the bent portion is engaged with the engaging portion, and the first member is attached to the exterior wall of one of the adjacent unit structures.

[0025] This allows the gap between the exterior walls of adjacent unit structures to be sealed by the mutually engaged first and second members, preventing wind and rain from entering the unit structures. Furthermore, the first and second members can be joined without gaps simply by engaging the bent portion of the first member with the engaging portion of the second member. This improves the ease of sealing the gap between the exterior walls of adjacent unit structures, and also makes it possible to seal the gap between the exterior walls of adjacent unit structures even when the space between the exterior wall and another building is small.

[0026] The symbols in parentheses for each means described in this section and in the claims are examples showing the correspondence with the specific means described in the embodiments to be described later. [Brief explanation of the drawings]

[0027] [Figure 1] FIG. 1 is a perspective view of a unit structure according to an embodiment of the present invention. [Figure 2] 1 is a flowchart of a unit structure installation method that constitutes one embodiment of the unit structure construction method of the present invention. [Figure 3] FIG. 10 is a cross-sectional view of a connection portion between horizontally adjacent unit structures. [Figure 4] FIG. [Figure 5] FIG. [Figure 6] FIG. [Figure 7] FIG. 2 is a top view of the base portion with the jack placed on the base portion. [Figure 8] FIG. 10 is a side view of the unit structure placed on the base portion via a jack. [Figure 9] FIG. 10 is an explanatory diagram of an installation confirmation process. [Figure 10] FIG. 10 is an explanatory diagram of an anchor bolt installation process. [Figure 11] FIG. 10 is an explanatory diagram showing the state in which anchor bolts are attached to floor beams. [Figure 12] FIG. 10 is an explanatory diagram showing a state in which reinforcing bars are placed under floor beams. [Figure 13] FIG. 10 is an explanatory diagram showing a state in which horizontally adjacent unit structures are connected. [Figure 14] 10A and 10B are explanatory diagrams showing how adjacent unit structures are connected in the horizontal and vertical directions. [Figure 15] FIG. 10 is a cross-sectional view of a connection portion between unit structures adjacent in the vertical direction. DETAILED DESCRIPTION OF THE INVENTION

[0028] (Structure of unit structures) A unit structure 100 according to one embodiment of the present invention will be described below with reference to FIG. 1. The unit structure 100, which will be described in detail later, is installed on the ground. As shown in FIG. 1, the unit structure 100 has four columns 11, four floor beams 12, four ceiling beams 13, a plurality of wall base members 14, a plurality of reinforced floor beams 15, a plurality of diagonal braces 16, and an exterior wall 17. The columns 11, floor beams 12, ceiling beams 13, wall base members 14, reinforced floor beams 15, and diagonal braces 16 are made of metal such as steel. In this embodiment, as will be described below, members that are subject to force and require rigidity, such as the columns 11, floor beams 12, ceiling beams 13, and diagonal braces 16, are made of steel having a thickness of 6 mm or more.

[0029] The four pillars 11 have an L-shaped cross section and are provided in the vertical direction at the four corners of the unit structure 100. The tops of the L-shaped cross sections of the pillars 11 coincide with the four corners of the unit structure 100. In this embodiment, the pillars 11 are L-shaped steel beams that are 12 mm thick and 75 mm x 75 mm.

[0030] Each floor beam 12 has both ends connected to the ends of other floor beams 12 by welding, forming a rectangular frame. The floor beam 12 has a generally U-shaped cross section and is composed of an upper plate 12a, a lower plate 12b, and a side plate 12c. In this embodiment, the floor beam 12 is a channel steel (C-beam). The length of the side plate 12c is 150 mm, the lengths of the upper plate 12a and the lower plate 12b are 75 mm, the thickness of the side plate 12c is 6.5 mm, the thickness of the base of the upper plate 12a and the lower plate 12b is 10 mm, and the thickness of the tip of the upper plate 12a and the lower plate 12b is 6.5 mm. The upper plate 12a and the lower plate 12b extend horizontally and face each other. The upper plate 12a is located above the lower plate 12b. The side plate portion 12c extends vertically and connects one end of the upper plate portion 12a and one end of the lower plate portion 12b in the width direction. The lower ends of the four pillars 11 are connected by welding to the four corners of the four floor beams 12 formed in the shape of a rectangular frame. The upper plate portions 12a of the floor beams 12 are connected to the lower ends of the pillars 11. The side plate portions 12c face outward from the unit structure 100.

[0031] A plurality of circular anchor bolt mounting holes 12d are formed in the lower plate portion 12b of the floor beam 12. In this embodiment, the anchor bolt mounting holes 12d are formed at the four corners of the four floor beams 12 formed in the rectangular frame shape in the lower plate portion 12b, and are also formed at regular intervals between both ends of the lower plate portion 12b.

[0032] A plurality of cylindrical jack insertion portions 12e are attached by welding to the underside of the floor beams 12, i.e., the underside of the lower plate portion 12b of the floor beams 12. In this embodiment, a total of four jack insertion portions 12e are provided on the underside of the left and right floor beams 12, two on each side, spaced a predetermined distance apart.

[0033] Each ceiling beam 13 has both ends connected to the ends of other ceiling beams 13 by welding, forming a rectangular frame. The ceiling beam 13 has a generally U-shaped cross section and is composed of an upper plate 13a, a lower plate 13b, and a side plate 13c. In this embodiment, the ceiling beam 13 is a channel steel (C-beam). The side plate 13c is 150 mm long, the upper plate 13a and the lower plate 13b are 75 mm long, the side plate 13c is 6.5 mm thick, the base portions of the upper plate 13a and the lower plate 13b are 10 mm thick, and the tip portions of the upper plate 13a and the lower plate 13b are 6.5 mm thick. The upper plate 13a and the lower plate 13b extend horizontally and face each other. The upper plate 13a is located above the lower plate 13b. The side plate portion 13c extends vertically and connects one end of the upper plate portion 13a and one end of the lower plate portion 13b in the width direction. The four corners of the four ceiling beams 13 formed in a rectangular frame are connected to the upper ends of the four pillars 11 by welding. The lower plate portions 13b of the ceiling beams 13 are connected to the upper ends of the pillars 11. The side plate portions 13c face outward from the unit structure 100.

[0034] A plurality of connecting holes 13d are formed in the upper plate portion 13a, which is the upper surface of the ceiling beam 13. As will be explained in detail later, the connecting holes 13d are for connecting unit structures 100 arranged adjacently or above. In this embodiment, one connecting hole 13d is formed at each end of the left and right ceiling beams 13, and two connecting holes 13d are formed in the left and right directions at each end of the front and rear ceiling beams 13. A plurality of spacer plates 13e are attached to the upper plate portion 13a of the ceiling beam 13 by welding. In this embodiment, the spacer plates 13e are attached to the center and both ends of the front and rear ceiling beams 13. The spacer plates 13e attached to both ends of the ceiling beams 13 are adjacent to the connecting holes 13d.

[0035] The wall base material 14 is a columnar member having a substantially U-shaped cross section. In this embodiment, the wall base material 14 is a lip channel steel (C-beam). The wall base material 14 is arranged so that its longitudinal direction coincides with the horizontal direction, and both ends are attached by welding to a pair of opposing columns 11, connecting the pair of opposing columns 11. In the embodiment shown in FIG. 1, a plurality of wall base materials 14 are provided on the rear and left surfaces of the unit structure 100 at predetermined intervals in the vertical direction.

[0036] The cross-sectional shape of the diagonal brace 16 may be a columnar shape, such as a U-shape, a square tube shape, a plate shape, or a rod shape. In this embodiment, the diagonal brace 16 is formed by welding a 6 mm thick, 75 mm × 75 mm square steel bar to both ends of the 6 mm thick, 65 mm long flat steel plate, or a 6 mm thick, 75 mm × 75 mm square steel bar. Alternatively, the diagonal brace 16 may be formed by attaching a turnbuckle to the middle of a round steel bar with an outer diameter of 27 mm, 16 mm, or 12 mm. The diagonal brace 16 is provided along the diagonal direction of the surface of the unit structure 100 on which the wall base material 14 is provided. Specifically, both ends of the diagonal brace 16 are attached by welding to the connection between the column 11 and the floor beam 12 or the ceiling beam 13. In the embodiment shown in FIG. 1 , the wall base material 14 and the diagonal brace 16 are not provided on the front or right side of the unit structure 100. This is because the front and right sides of the unit structures 100 are connected to other unit structures 100 or have entrances and exits, forming passages through which people can pass.

[0037] The reinforced floor beams 15 are columns with a roughly U-shaped cross section. In this embodiment, the reinforced floor beams 15 are lip channel steel (C-beam) with a thickness of 3.2 mm, with a height dimension of 100 mm, a width dimension of 50 mm, and a lip dimension of 20 mm. The reinforced floor beams 15 are arranged so that their longitudinal direction coincides with the horizontal direction, and both ends are attached by welding to a pair of opposing floor beams 12, connecting the opposing pair of floor beams 12. A plurality of reinforced floor beams 15 are provided at predetermined intervals in the front-to-rear direction.

[0038] The exterior wall 17 is a plate made of gypsum, metal, wood, resin, ceramic, or the like, and is attached to cover one of the four sides of the unit structure 100. The exterior wall 17 is fixed to the wall base material 14 with screws or rivets. In this embodiment, as shown in FIG. 3 , the exterior wall 17 is made up of, from the inside to the outside, a gypsum board 17a, a waterproof sheet 17b, and a corrugated steel plate 17c. In this embodiment, the corrugated steel plate 17c is a galvalume steel plate, which is a steel plate plated with an aluminum-zinc alloy, which has excellent corrosion resistance.

[0039] (Installation method of unit structure) A unit structure installation method that constitutes a part of a unit structure construction method according to one embodiment of the present invention will be described below with reference to Figures 2 to 12. As shown in Figure 2, the unit structure construction method sequentially performs steps S1 to S20. When the unit structure installation method starts, the process proceeds to step S1.

[0040] Step S1 "ground reinforcement process" is a process of reinforcing the ground on which the unit structure 100 will be installed. A plurality of columnar holes are excavated at predetermined intervals in the vertical and horizontal directions in the ground, and a cement milk slurry made by adding water to a cement-based solidification material is poured into these holes and allowed to solidify, thereby carrying out columnar improvement. Alternatively, a plurality of steel pipes may be driven into the ground at predetermined intervals in the vertical and horizontal directions. Once step S1 is completed, the process proceeds to step S2.

[0041] Step S2 "base portion forming step" is a step of forming a base portion 200 having a horizontal upper surface on the ground. A formwork is formed to surround the ground, which is the ground reinforced in step S1, and water supply and drainage pipes 210 (shown in FIG. 4) are arranged within the formwork, rebar is arranged in a grid pattern, concrete is poured into the formwork, and after the concrete has hardened, the formwork is removed to form the base portion 200. In this embodiment, as shown in FIG. 4, the base portion 200 is adjacent to another building 900 in the width direction. After step S2 is completed, the process proceeds to step S3.

[0042] Step S3 "marking process" is a process of marking the base portion 200 with a grid line mark 201a, an exterior wall base surface mark 201b, and a jack mark 202. The grid line mark 201a and the exterior wall base surface mark 201b are marks that indicate the appropriate horizontal installation position of the unit structure 100. The grid line mark 201a is a mark written along the width direction of the base portion 200, and represents the outer edge of the unit structure 100 in the depth direction. A pair (two) of grid line marks 201a are written on the base portion 200 for one unit structure 100. The exterior wall base surface mark 201b is a mark written along the depth direction of the base portion 200, and represents the outer edge of the unit structure 100 in the width direction, i.e., the outer edge of the exterior wall 17. A pair (two) of exterior wall base surface marks 201b are written for one unit structure 100. A rectangular mark is drawn on the base part 200 using a pair of grid line marks 201a and a pair of exterior wall base surface marks 201b. In this embodiment, a plurality of unit structures 100 are installed continuously in one direction (depth direction) on the base part 200, so a rectangular mark made up of a plurality of pairs of grid line marks 201a and pairs of exterior wall base surface marks 201b is drawn continuously in one direction on the base part 200. Adjacent grid line marks 201a are spaced apart by the spacing dimension between adjacent unit structures 100.

[0043] The jack mark 202 is a mark that indicates the placement position of the base member 301 of the jack 300 (described later) on the base portion 200 (shown in Figures 4 and 7). In this embodiment, the jack mark 202 is a line that coincides with the depth direction and is written at a position a predetermined distance inward from the exterior wall base surface mark 201b. In this embodiment, one jack mark 202 is written at a position a predetermined distance inward from each of the pair of exterior wall base surface marks 201b, and another jack mark 202 is written a predetermined distance inward from each of the jack marks 202. In other words, in this embodiment, four jack marks 202 are written on the base portion 200. When step S3 is completed, proceed to step S4.

[0044] Here, the jack 300 will be described with reference to Figures 5 and 6. As shown in Figures 5 and 6, the jack 300 is composed of a base member 301, an insertion portion 302, and a handle portion 303. The base member 301, the insertion portion 302, and the handle portion 303 are made of metal such as steel. As shown in Figure 6, the base member 301 is a substantially square plate, and four anchor holes 301a are formed around the periphery of the joint with the insertion portion 302. As shown in Figure 5, the insertion portion 302 is a round bar, and is joined to the center of the base member 301 by welding and extends in a direction perpendicular to the extension direction of the base member 301. A male thread 302a is formed on the outer peripheral surface of the insertion portion 302. The outer diameter of the insertion portion 302 (the outermost diameter of the male thread 302a) is slightly smaller than the inner diameter of the jack insertion portion 12e.

[0045] As shown in Figures 5 and 6, the handle portion 303 is composed of a substantially disk-shaped support portion 303a and a pair of round rod-shaped grip portions 303b protruding from the outer edge of the support portion 303a. A female-threaded screw hole 303c is formed in the center of the support portion 303a. The male threads 302a of the insertion portion 302 are screwed into the screw hole 303c, and the handle portion 303 is rotatably attached to the insertion portion 302. A support surface 303d, which is a flat surface parallel to the base member 301, is formed around the screw hole 303c on the upper surface of the support portion 303a. When the handle portion 303 is rotated relative to the insertion portion 302, the handle portion 303 moves up and down relative to the base member 301 and the insertion portion 302.

[0046] Returning to FIG. 2, the explanation of the unit structure installation method will be resumed. In step S4, the "jack placement process," the jack 300 is placed on the base portion 200 so that the center of the base member 301 of the jack 300 coincides with the jack mark 202, as shown in FIG. 7. In this embodiment, two jacks 300 are placed in the depth direction on a pair of jack marks 202 for one unit structure 100, for a total of four jacks 300. The jacks 300 are placed on the base portion 200 close to the centerline mark 201a so that the outer edge of the base member 301 coincides with the centerline mark 201a. In this embodiment, the jacks 300 of unit structures 100 adjacent in the depth direction are placed on different jack marks 202, as shown in FIG. 7. In other words, when the jack 300 of a certain unit structure 100 is placed at the center of the outer jack mark 202, the jack 300 of the unit structure 100 adjacent to said unit structure 100 is placed at the center of the inner jack mark 202. The jacks 300 are positioned in this manner to prevent interference between the jacks 300 of adjacent unit structures 100. Once step S4 is completed, the process proceeds to step S5.

[0047] In step S5, the "unit structure placement process," first, a crane or the like is used to lift the unit structure 100 onto the base portion 200, and the horizontal position of the unit structure 100 relative to the base portion 200 is adjusted so that the outer edge of the unit structure 100 in the depth direction coincides with the centerline mark 201a and the outer edge of the unit structure 100 in the width direction coincides with the exterior wall base surface mark 201b. Next, the unit structure 100 is lowered, and the insertion portions 302 of each jack 300 are inserted into the corresponding jack insertion portions 12e of the unit structure 100, and the unit structure 100 is placed on each jack 300 (the state shown in FIG. 8). In this state, the lower ends of the jack insertion portions 12e are supported by abutting against the support surfaces 303d of the jacks 300. The horizontal position of the unit structure 100 relative to the base portion 200 may be finely adjusted after each insertion portion 302 has been inserted into each jack insertion portion 12e and before the unit structure 100 is placed on each jack 300. When step S5 is completed, the process proceeds to step S6.

[0048] In step S6, a "leveling step," the handle 303 of each jack 300 is rotated to adjust the vertical position of the unit structure 100 relative to the base 200 to the design dimensions, and to level the unit structure 100. Here, leveling the unit structure 100 means leveling the floor beams 12 and ceiling beams 13, which are components that make up the unit structure 100, and ensuring that these floor beams 12 and ceiling beams 13 are not tilted. In this leveling step, a spirit level (not shown) is placed on the components that make up the unit structure 100, such as the floor beams 12 and ceiling beams 13, and the handle 303 of each jack 300 is rotated so that the components that make up the unit structure 100, such as the floor beams 12 and ceiling beams 13, are level. After step S6 is completed, the process proceeds to step S7.

[0049] In step S7, the "installation confirmation process," it is confirmed that the unit structure 100 is installed in the desired horizontal position on the base portion 200 and that the unit structure 100 is installed horizontally. Note that "the unit structure 100 is installed in the desired horizontal position on the base portion 200" means that the outer edge of the unit structure 100 in the depth direction coincides with the grid mark 201a, and the outer edge of the unit structure 100 in the width direction coincides with the exterior wall base surface mark 201b. Note that an error of 2 mm or less is permitted in the above-mentioned coincidence (preferably 1 mm).

[0050] In this embodiment, as shown in Fig. 9, confirmation is performed using a plumb bob 800 and a ruler 700. The plumb bob 800 is composed of a holder (not shown) to which a permanent magnet is attached, a plumb bob 801 with a pointed tip, and a connecting cord 802 that connects the holder and the plumb bob 801. The holder is equipped with a winding mechanism that winds up the connecting cord 802. The holder of the plumb bob 800 is attached to the outer edge of the unit structure 100 (in the example of Fig. 8, the side surface of the wall base material 14), and the tip of the plumb bob 801 is brought close to the top surface of the base part 200.

[0051] Next, the ruler 700 is used to measure the distance between the centerline mark 201a or the exterior wall base surface mark 201b and the tip of the weight 801. If the distance α (hereinafter abbreviated as distance α) between the centerline mark 201a or the exterior wall base surface mark 201b and the tip of the weight 801 is the same as the distance β (hereinafter abbreviated as distance β) between the attachment surface of the retainer to the outer edge of the unit structure 100 and the base end of the connecting string 802, it is determined that the connecting string 802 is vertical and the unit structure 100 is not tilted. The distances α and β are measured for both the centerline mark 201a and the exterior wall base surface mark 201b, and if these distances α and β are the same, it is determined that the unit structure 100 is installed in the desired horizontal position on the base part 200 and that the unit structure 100 is installed horizontally, and the process proceeds to step S8. On the other hand, if the distance α and the distance β of at least either of the center line mark 201a or the exterior wall base surface mark 201b do not match, it is determined that the unit structure 100 is not installed in the desired horizontal position of the base part 200, or that the unit structure 100 is not installed horizontally, and the process proceeds to step S20. Note that an error of 2 mm or less is allowed for the distance α and the distance β to be the same (preferably 1 mm).

[0052] In step S20, the "horizontal position and level adjustment process," the horizontal position of the unit structure 100 relative to the base portion 200 is adjusted in the same manner as in steps S5 and S6 so that the outer edge of the unit structure 100 coincides with the centerline mark 201a and the exterior wall base surface mark 201b, and the members that make up the unit structure 100 are adjusted so that they are level. When step S20 is completed, the process proceeds to step S7.

[0053] In step S8, the "jack fixing process," the base member 301 of the jack 300 is fixed to the base portion 200. In this embodiment, a pilot hole is drilled in the base portion 200 directly below the anchor hole 301a of the base member 301 of the jack 300, an anchor is inserted into the pilot hole, and after the anchor is fixed to the pilot hole, a nut is tightened onto the anchor, thereby fixing the jack 300 to the base portion 200. Note that the anchors used in this process include driving anchors, tightening anchors, and chemical anchors (registered trademark). After step S8 is completed, the process proceeds to step S9. Note that when multiple unit structures 100 are to be installed on the base portion 200, steps S4 to S8 are performed for each unit structure 100 to be installed on the base portion 200.

[0054] In step S9 "anchor bolt installation process," as shown in Figures 10 and 11, base ends 401a (shown in Figure 11) of anchor bolts 401 are inserted into anchor bolt installation holes 12d formed in the floor beams 12, and the base ends 401a of the anchor bolts 401 are fixed to the lower plate portion 12b of the floor beams 12 with nuts 402 (shown in Figure 11). In this embodiment, as shown in Figure 11, one nut 402 is screwed into the base end 401a of the anchor bolt 401 on the lower side of the lower plate portion 12b, and two nuts 402 are screwed into the base end 401a of the anchor bolt 401 on the upper side of the lower plate portion 12b, forming a double-nut structure. Washers 403 are disposed between the nuts 402 and the lower plate portion 12b. As shown in FIG. 10 , in this embodiment, anchor bolt 401 is formed by bending a rod and includes vertical portion 401b extending vertically downward from floor beam 12, horizontal portion 401c extending horizontally from the lower end of vertical portion 401b, and tip portion 401d bent into a J-shape from the tip of horizontal portion 401c. In this embodiment, as shown in FIG. 11 , anchor bolts 401 are attached radially to the four corners of floor beam 12. Because anchor bolts 401 are attached radially to the four corners of floor beam 12 in this way, when a foundation is formed in step S12 ("foundation formation step") described later, the radially arranged anchor bolts 401 firmly connect the four corners of floor beam 12 to the concrete. After step S9 is completed, the process proceeds to step S10.

[0055] In step S10 "reinforcing bar arrangement step," as shown in Fig. 12, reinforcing bars 450 are arranged in a grid pattern inside the frame-shaped floor beams 12, below the floor beams 12 and above the base portion 200. When step S10 is completed, the process proceeds to step S11.

[0056] In step S11 "formation process," a form 500 (shown in FIG. 11) extending vertically is formed on the base portion 200 so as to surround the floor beams 12, which are the lower part of the unit structure 100. In this embodiment, the form 500 is in close contact with the outer surface of the floor beams 12. When step S11 is completed, the process proceeds to step S12.

[0057] In step S12, the "foundation formation process," fresh concrete is poured into the formwork 500 and allowed to harden and dry to form the foundation. The fresh concrete is poured until it reaches at least the lower plate portion 12b of the floor beam 12. The jack 300 on which the base portion 200 is placed is buried in the fresh concrete. After the fresh concrete has hardened and dried, the formwork 500 is removed. Once the foundation is formed, the unit structure 100 is supported by this foundation. When step S12 is completed, the "unit structure installation method" is completed.

[0058] (Installation of adjacent unit structures) Depending on the size of the building to be constructed, the unit structure 100 is installed horizontally adjacent to the base portion 200 using the unit structure installation method described above. In some cases, an upper unit structure 150, which will be described later, is stacked on top of the unit structure 100 and fixed in place using a method described later. In some cases, one or more upper unit structures 150 are stacked on top of the upper unit structures 150 stacked on top of the unit structure 100 and fixed in place.

[0059] (Unit structure connection process) Next, a description will be given of the unit structure connecting process, which constitutes part of a unit structure construction method according to one embodiment of the present invention. The following description will be given of an example in which an upper unit structure 150 is not stacked on top of a unit structure 100. In step S5 ("unit structure placing process") in FIG. 2, when placing a unit structure 100 next to a unit structure 100 already placed on a jack 300, as shown in FIG. 13A, multiple spacers 600 are first installed on the ceiling beam 13 of the unit structure 100 already placed on the jack 300. These spacers 600 are plate-shaped and bent at a right angle to form an L-shaped cross section. One piece 600a of the spacer 600 is placed on the ceiling beam 13 of the unit structure 100 already placed on the jack 300, and the other piece 600b of the spacer 600 is brought into close contact with the side of the ceiling beam 13 of the unit structure 100 already placed on the jack 300.

[0060] Next, the unit structure 100 to be newly placed on the jack 300 is pulled up, the ceiling beam 13 of this unit structure 100 is brought into abutment against the other piece 600a of the spacer 600, and the unit structure 100 is placed on the jack 300. In this way, adjacent unit structures 100 are placed on the jack 300 in a state where they are accurately spaced apart by the other pieces 600b of the spacers 600, and the unit structures 100 can be placed in accurate positions on the base portion 200.

[0061] Next, as shown in Figure 13(B), the spacer 600 is removed, and then the plate-like first connecting member 651 and second connecting member 652 that connect adjacent unit structures 100 are placed on the ceiling beams 13 of the two adjacent unit structures 100 so as to bridge these ceiling beams 13. The first connecting member 651 and the second connecting member 652 have communication holes 651a, 652a formed therein that correspond to the positions of the connection holes 13d formed on the ceiling beams 13 of the two adjacent unit structures 100. Then, the communication holes 651a, 652a of the first connecting member 651 and the second connecting member 652, respectively, are aligned with the connection holes 13d that correspond to these communication holes 651a, 652a (the state of Figure 13(B)).

[0062] Next, bolts 655 are inserted into the communication holes 651a, 652a and the connecting holes 13d, and nuts (not shown) are tightened onto these bolts 655. This firmly connects the ceiling beams 13 of adjacent unit structures 100 to each other.

[0063] Next, a method for installing an upper unit structure 150 on top of an already installed unit structure 100 and connecting vertically adjacent unit structures 100 and the upper unit structure 150 will be described. The upper unit structures 150 for the second and higher floors basically have the same structure as the unit structure 100 for the first floor described above, except that they do not have the jack insertion portion 12e and anchor bolt mounting holes 12d, and instead have lower connecting holes 12f (shown in FIG. 14) formed in the lower plate portions 12b of the floor beams 12. The lower connecting holes 12f formed in the floor beams 12 are formed in positions corresponding to the connecting holes 13d formed in the ceiling beams 13.

[0064] First, the first connecting member 651 and the second connecting member 652 are placed on the ceiling beam 13 of the already installed unit structure 100. At this time, the positions of the communication holes 651a, 652a formed in the first connecting member 651 and the second connecting member 652 are aligned with the position of the connecting hole 13d formed in the ceiling beam 13 of the unit structure 100. The plate thickness of the first connecting member 651 and the second connecting member 652 is the same as the plate thickness of the spacer plate 13e.

[0065] Next, the upper unit structure 150 is lifted up and placed on the ceiling beams 13 of the already installed unit structure 100. At this time, the position of the lower connecting hole 12f formed in the floor beam 12 of the upper unit structure 150 is aligned with the positions of the communication holes 651a, 652a formed in the first connecting member 651 and the second connecting member 652, and the position of the connecting hole 13d formed in the ceiling beam 13 of the unit structure 100. At this time, if the positions of the communicating holes 651a, 652a of the first connecting member 651 and the second connecting member 652 are misaligned from the position of the connecting hole 13d formed in the ceiling beam 13 of the unit structure 100, a tool such as a crowbar is inserted between the ceiling beam 13 of the unit structure 100 and the floor beam 12 of the upper unit structure 150 to widen the gap between the ceiling beam 13 of the unit structure 100 and the floor beam 12 of the upper unit structure 150, and the first connecting member 651 and the second connecting member 652 are moved to align the positions of the communicating holes 651a, 652a with the connecting hole 13d.

[0066] Next, as shown in Figure 14, bolts 655 are inserted into each of the lower connecting holes 12f, each of the communication holes 651a, 652a, and each of the connecting holes 13d, and nuts 656 are screwed onto these bolts 655 and tightened. This fixes the upper unit structure 150 onto the already installed unit structure 100, and positions it at a specified, accurate position in the horizontal direction. Furthermore, horizontally adjacent unit structures 100, 150 are firmly connected to each other.

[0067] (Exterior wall joining process for unit structures) Next, an exterior wall joining process that constitutes part of a unit structure construction method according to one embodiment of the present invention will be described. As shown in Figure 3, a first joining member 18 and a second joining member 19 are disposed at the joints 17d of horizontally adjacent unit structures 100 to seal the gap between horizontally adjacent exterior walls 17 and prevent wind and rain from entering the interior of the unit structures 100. The first joining member 18 is attached to one end of the horizontally adjacent exterior wall 17, and the second joining member 19 is attached to the other end of the horizontally adjacent exterior wall 17. The first joining member 18 and the second joining member 19 are made of a metal such as an aluminum alloy.

[0068] The first joint member 18 is formed by bending a metal flat plate and is composed of, in order from one end to the other end, an attachment portion 18a, a first rising portion 18b, a first outer plate portion 18c, and a first bent portion 18d. The attachment portion 18a is flat and is disposed in close contact with a recess in the corrugated steel plate 17c. A screw 25 passes through the attachment portion 18a and is threaded into the outer wall 17 to attach the first joint member 18 to the outer wall 17. The first rising portion 18b extends in a direction perpendicular to the attachment portion 18a and protrudes outward from the outer wall 17. The first outer plate portion 18c is connected to an end of the first rising portion 18b and extends in a direction perpendicular to the first rising portion 18b, extending in the same direction as the attachment portion 18a. The first outer plate portion 18c is disposed outside the gap between horizontally adjacent outer walls 17 and closes this gap. The first bent portion 18d is a flat plate connected to the end of the first outer plate portion 18c. The angle formed between the extension direction of the first bent portion 18d and the extension direction of the first outer plate portion 18c is an acute angle.

[0069] The second joining member 19 is formed by bending a metal flat plate, and the cross section of its end is roughly U-shaped. It is composed of a first insertion portion 19a, a second rising portion 19b, and a first engagement portion 19c. The first insertion portion 19a is a flat plate extending laterally and is inserted between the corrugated steel plate 17c and the waterproof sheet 17b at the other horizontal end of the exterior wall 17. The second rising portion 19b extends in a direction perpendicular to the first insertion portion 19a and protrudes outward from the exterior wall 17. The first engagement portion 19c extends in a direction perpendicular to the second rising portion 19b and faces the first insertion portion 19a.

[0070] After attaching the second joint member 19 to the other exterior wall 17, the first bent portion 18d is hooked onto and engaged with the first engaging portion 19c, and as described above, the screw 25 is screwed into the mounting portion 18a to attach the first joint member 18 to one of the exterior walls 17. With this structure, the end of the first outer plate portion 18c and the first engaging portion 19c overlap, preventing wind and rain from entering the unit structure 100.

[0071] As shown in Figure 15, a third joining member 21 and a fourth joining member 22 are arranged at the joints 17e of vertically adjacent unit structures 100 to close the gap between the vertically adjacent exterior walls 17 and prevent wind and rain from entering the interior of the unit structures 100. The third joining member 21 is attached to the upper side of the vertically adjacent exterior wall 17, and the fourth joining member 22 is attached to the lower side of the vertically adjacent exterior wall 17. The third joining member 21 and the fourth joining member 22 are made of a metal such as an aluminum alloy.

[0072] The third joint member 21 is formed by bending a metal flat plate and is composed of, in order from one end to the other end, a second insertion portion 21a, an inclined portion 21b, a second outer plate portion 21c, and a second bent portion 21d. The second insertion portion 21a is a flat plate extending in the vertical direction and is inserted between the corrugated steel plate 17c and the waterproof sheet 17b at the lower end of the outer wall 17 above the adjacent outer wall 17 in the vertical direction. The inclined portion 21b is a flat plate connected to the lower end of the second insertion portion 21a and protrudes outside the outer wall 17. The inclined portion 21b is inclined downward as it moves outside the outer wall 17. The second outer plate portion 21c is a flat plate extending in the vertical direction and connected to the end of the inclined portion 21b. The angle between the extension direction of the second bent portion 21d and the extension direction of the second outer plate portion 21c is an acute angle.

[0073] The fourth joint member 22 is formed by bending a metal flat plate, and its end has a generally U-shaped cross section. It is composed of a third insertion portion 22a, a third rising portion 22b, and a second engagement portion 22c. The third insertion portion 22a is a flat plate extending in the vertical direction and is inserted between the corrugated steel plate 17c and the waterproof sheet 17b at the upper end of the lower of the two adjacent exterior walls 17. The third rising portion 22b extends perpendicular to the third insertion portion 22a and protrudes outward from the exterior wall 17. The second engagement portion 22c extends downward perpendicular to the third rising portion 22b and faces the third insertion portion 22a.

[0074] After the fourth joint member 22 is attached to the exterior wall 17, the second bent portion 21d is engaged with the second engaging portion 22c so as to be hooked onto it, and the third joint member 21 is attached to the exterior wall 17. With this structure, the lower end of the second outer plate portion 21c and the second engaging portion 22c overlap, preventing wind and rain from entering the unit structure 100.

[0075] As described above, the inclined portion 21b is inclined downward as it moves toward the outside of the outer wall 17, so that rainwater does not accumulate in the inclined portion 21b.

[0076] (Subsequent process) After the unit structures 100, 150 are installed on the base portion 200, exterior construction, interior construction, plumbing work, electrical work, etc. of the unit structures 100, 150 are carried out to complete the building.

[0077] (Effects of this embodiment) The unit structure 100 has a plurality of anchor bolt mounting holes 12d formed in the lower part, and is provided with a plurality of cylindrical jack insertion portions 12e that protrude downward.

[0078] According to this, a jack 300 having a rod-shaped insertion portion 302 is placed on the base portion 200, the unit structure 100 is lifted up onto the base portion 200, the unit structure 100 is then lowered, the insertion portion 302 of the jack 300 is inserted into the jack insertion portion 12e, the unit structure 100 is placed on the jack 300, anchor bolts 401 are attached to the anchor bolt attachment holes 12d, a formwork 500 is formed on the base portion 200 surrounding the lower part of the unit structure 100, concrete is poured into the formwork 500 to form a foundation, and the unit structure 100 can be installed on the base portion 200.

[0079] Therefore, when installing the unit structure 100, there is no need to perform the conventional difficult task of moving the unit structure, which is a lifted heavy object, horizontally and inserting anchor bolts provided in the foundation into anchor holes in the unit structure, but workability is improved by simply moving the jack 300 horizontally and inserting the insertion portion 302 of the jack 300 into the jack insertion portion 12e of the unit structure 100. Furthermore, workability is improved because the anchor bolt 401 can be attached to the anchor bolt attachment hole 12d formed in the unit structure 100 after the unit structure placing step S5.

[0080] The unit structure 100 has a ceiling beam 13 extending horizontally at the top, and a connecting hole 13d is formed in the upper surface of the ceiling beam 13, and a spacer plate 13e is attached to the upper surface.

[0081] According to this, connecting members 651, 652 having communicating holes 651a, 652a formed therein corresponding to the connecting holes 13d of the ceiling beams 13 of horizontally adjacent unit structures 100 are placed on the upper surfaces of the horizontally adjacent ceiling beams 13 so as to bridge the horizontally adjacent ceiling beams 13, and then the upper unit structure 150 is lifted up and placed on the ceiling beam 13 of the unit structure 100, and the communicating holes 651a, 652a of the connecting members 651, 652 are aligned with the connecting holes 13d and the lower connecting holes 12f formed at the lower end of the upper unit structure 150, and bolts 655 are inserted into the respective communicating holes 651a, 652a, connecting holes 13d, and lower connecting holes 12f, and nuts 656 are screwed onto the respective bolts 655, thereby connecting the horizontally and vertically adjacent unit structures 100, 150 to each other.

[0082] In addition, since a spacer plate 13e is attached to the upper surface of the ceiling beam 13, if the positions of the respective communicating holes 651a, 652a of the connecting members 651, 652 are misaligned with the connecting hole 13d and the lower connecting hole 12f, a tool such as a crowbar can be inserted between the ceiling beam 13 of the unit structure 100 and the floor beam 12 of the upper unit structure 150 to widen the gap between the ceiling beam 13 of the unit structure 100 and the floor beam 12 of the upper unit structure 150, and the connecting members 651, 652 can be moved to align the positions of the communicating holes 651a, 652a with the connecting hole 13d and the lower connecting hole 12f.

[0083] The unit structure construction method of this embodiment is a method of installing a pre-assembled unit structure 100 on the ground, and the unit structure 100 has a plurality of anchor bolt mounting holes 12d formed in the bottom and a plurality of cylindrical jack insertion portions 12e protruding downward, and includes a base portion forming process S2 of forming a base portion 200 on the ground whose upper surface is horizontal; a jack placing process S4 of placing a jack 300 formed with a rod-shaped insertion portion 302 on the base portion 200; and a step S5 of lifting the unit structure 100 above the base portion 200 and then lowering the unit structure 100. The method includes a unit structure placing process S5 in which the insertion portion 302 of the jack 300 is inserted into the jack insertion portion 12e of the unit structure 100 to place the unit structure 100 on the jack 300, a leveling process S6 in which the unit structure 100 is leveled using the jack 300, an anchor bolt attaching process S9 in which anchor bolts 401 are attached to the anchor bolt attaching holes 12d, a formwork forming process S11 in which a formwork 500 is formed on the base portion 200 to surround the lower part of the unit structure 100, and a base forming process S12 in which concrete is poured into the formwork 500 to form a foundation.

[0084] According to this, when installing the unit structure 100, it is not necessary to perform the conventional difficult task of moving the unit structure, which is a heavy object lifted up, horizontally and inserting anchor bolts provided in the foundation into anchor holes in the unit structure, but rather it is only necessary to move the jack 300 horizontally and insert the insertion portion 302 of the jack 300 into the jack insertion portion 12e of the unit structure 100, thereby improving workability. In other words, since the jack 300 is light compared to the unit structure 100, which is a heavy object, it is easy to move the jack 300 horizontally and insert the insertion portion 302 of the jack 300 into the jack insertion portion 12e of the unit structure 100. Furthermore, it is only necessary to attach the anchor bolt 401 to the anchor bolt attachment hole 12d formed in the unit structure 100 after the unit structure placing step S5, improving workability.

[0085] In this embodiment, it is possible to install the unit structure 100 at the desired horizontal position on the base portion 200 with an error of 2 mm or less. Conventionally, if the horizontal positions of the anchor bolt and anchor hole could not be aligned, the anchor hole was enlarged, resulting in an installation error of up to 5 mm. In this embodiment, it is possible to install the unit structure 100 on the base portion 200 with high precision in its horizontal position. Conventionally, the maximum error in the height direction of the unit structure 100 was 5 mm. However, in this embodiment, the height of the unit structure 100 relative to the base portion 200 is adjusted using the jack 300, so the error in the height direction of the unit structure 100 can be kept within 2 mm.

[0086] The method also includes a marking process S3 for marking the base portion 200 with a centerline mark 201a and an exterior wall base surface mark 201b, which indicate the appropriate horizontal installation position of the unit structure 100, and in the unit structure placement process S5, the centerline mark 201a and the exterior wall base surface mark 201b are used to align the horizontal position of the unit structure 100 relative to the base portion 200.

[0087] This allows the unit structure 100 to be accurately installed at a desired position on the base portion 200.

[0088] Furthermore, the method further includes a jack fixing step S8 of fixing the jack 300 to the base portion 200 before the formwork forming step S11.

[0089] According to this, by fixing the jack 300 to the base portion 200, horizontal displacement of the unit structure 100 attached to the jack 300 relative to the base portion 200 is suppressed.

[0090] The upper end of the unit structure 100 has a ceiling beam 13 extending horizontally, and a connecting hole 13d is formed on the upper surface of the ceiling beam 13. The lower end of the upper unit structure 150 placed on the unit structure 100 has a floor beam 12 extending horizontally, and a lower connecting hole 12f is formed on the lower surface of the floor beam 12. Connecting members 651, 652 having communication holes 651a, 652a formed therein corresponding to the connecting holes 13d of the horizontally adjacent ceiling beams 13 are used to bridge the horizontally adjacent ceiling beams 13. The method further includes a connecting step in which the upper unit structure 150 is placed on the upper surface of the horizontally adjacent ceiling beam 13 so as to bridge the upper unit structure 150, and then the upper unit structure 150 is lifted up and placed on the ceiling beam 13 of the unit structure 100, and the communicating holes 651a, 652a of the connecting members 651, 652 are aligned with the connecting hole 13d and the lower connecting hole 12f, and bolts 655 are inserted into the communicating holes 651a, 652a, the connecting hole 13d, and the lower connecting hole 12f, and then nuts 656 are screwed onto the bolts 655.

[0091] According to this, horizontally adjacent unit structures 100 are connected by the connecting members 651, 652, and horizontal displacement of the unit structures 100 relative to the base portion 200 is suppressed. In addition, the upper unit structure 150 is connected to the unit structure 100. Furthermore, since a spacer plate 13e is attached to the upper surface of the ceiling beam 13, if the positions of the communication holes 651a, 652a of the connecting members 651, 652 are misaligned with the connecting hole 13d and the lower connecting hole 12f, a tool such as a crowbar can be inserted between the ceiling beam 13 of the unit structure 100 and the floor beam 12 of the upper unit structure 150 to widen the gap between the ceiling beam 13 of the unit structure 100 and the floor beam 12 of the upper unit structure 150, and the connecting members 651, 652 can be moved to align the positions of the communication holes 651a, 652a with the connecting hole 13d and the lower connecting hole 12f.

[0092] In this embodiment, as described above, the unit structure 100 can be attached to the base portion 200 with high horizontal precision. Therefore, even if the number of connecting holes 13d and communicating holes 651a and 652a is increased, the bolts 655 can be inserted into the connecting holes 13d and communicating holes 651a and 652a. Therefore, since the number of bolts 655 can be increased, ordinary bolts can be used as the bolts 655, rather than high-strength bolts. As a result, when dismantling the unit structure 100, it is not necessary to destroy the bolts 655 as in the case of using high-strength bolts. Simply loosening the nuts 656 allows the bolts 655 and nuts 656 to be removed. This facilitates dismantling and enables the unit structure 100 to be reused.

[0093] In addition, an outer wall 17 is attached to at least one surface of the unit structure 100 before it is installed on the base portion 200, and the method further includes an outer wall joining process in which the first joining member 18 and the third joining member 21, which are first members having bending portions 18d and 21d at acute angles at the ends, and the second joining member 19 and the fourth joining member 22, which are second members having engaging portions 19c and 22c at the ends formed in a U-shape, are attached to the other outer wall 17 of the adjacent unit structure 100, and the bending portions 18d and 21d are engaged with the engaging portions 19c and 22c, thereby attaching the first members, the first joining member 18 and the third joining member 21, to one outer wall 17 of the adjacent unit structure 100.

[0094] According to this, the gap between the outer walls 17 of adjacent unit structures 100, 150 is blocked by the mutually engaged first members (first joining member 18 and third joining member 21) and second members (second joining member 19 and fourth joining member 22), preventing wind and rain from entering the unit structure 100. Furthermore, simply by engaging the bent portions 18d, 21d of the first members (first joining member 18 and third joining member 21) with the engaging portions 19c, 22c of the second members (second joining member 19 and fourth joining member 22), the first members (first joining member 18 and third joining member 21) can be joined without any gaps to the second members (second joining member 19 and fourth joining member 22). This improves the workability of sealing the gaps between the exterior walls 17 of adjacent unit structures 100, 150, and makes it possible to seal the gaps between the exterior walls 17 of adjacent unit structures 100, 150 even when the space between the exterior wall 17 and another building 900 is small, as shown in Figures 8 and 10.

[0095] Even if the interior decorations applied to the unit structures 100, 150 of this embodiment are different, the basic structure of the unit structures 100, 150 is the same, so once the strength calculation for the unit structures 100, 150 is performed, there is no need to perform strength calculations for each unit structure with a different interior decoration. The unit structures 100, 150 of this embodiment are sized to be able to be loaded onto a truck, but as explained above, by connecting the unit structures 100, 150 horizontally and vertically, buildings of any size can be constructed.

[0096] The members that make up the unit structure 100 of this embodiment are cut and drilled using a laser processing machine, so they can be assembled (welded and joined) with a dimensional error of 2 mm or less.

[0097] (Another embodiment) The present invention has been described above in relation to the embodiment that is considered to be the most practical and preferable at present, but the present invention is not limited to the embodiment disclosed in the specification of this application, and can be modified as appropriate within the scope of the claims and the gist or idea of ​​the invention that can be read from the specification as a whole, and it must be understood that unit structures and unit structure construction methods that involve such modifications are also included within the technical scope.

[0098] In the embodiment described above, the jack insertion portion 12e has a cylindrical shape, but it may have a square cylindrical shape.

[0099] In the embodiment described above, when the unit structure 100 is installed on the base portion 200, the exterior wall 17 is attached in advance to one side of the unit structure 100. In cases where there are no other buildings 900 around the unit structure 100 or where the distance between the unit structure 100 and the other buildings 900 is large, the exterior wall 17 may not be attached to one side of the unit structure 100, and the exterior wall 17 may be attached to the unit structure 100 after the unit structure 100 is installed on the base portion 200. [Explanation of symbols]

[0100] 12d: Anchor bolt mounting hole 12e: Jack insertion part 13: Ceiling beam 13d: Communication hole 13e: Spacer plate 17: Exterior wall 18: First joining member (first member) 18d: First bending part (bending part) 19: Second joining member (second member) 19c: First engaging part (engaging part) 21: Third joining member (first member) 21d: Second bending portion (bending portion) 22: Fourth joining member (second member) 22c: Second engagement portion (engagement portion) 100: Unit structure 200: Base 201a: Grid line mark (mark) 201b: Exterior wall base surface mark (mark) 300: Jack 302: Insertion section 401: Anchor bolt 500: Formwork 651: First connecting member (connecting member) 651a: Communication hole 652: Second connecting member (connecting member) 652a: Communication hole 655: Bolt 656: Nut

Claims

1. A unit structure construction method for installing a pre-assembled unit structure (100) on the ground, comprising: The unit structure has a plurality of anchor bolt mounting holes (12d) formed in the lower part thereof, and a plurality of cylindrical jack insertion portions (12e) protruding downward. a base portion forming step (S2) of forming a base portion (200) having a horizontal upper surface on the ground; a jack placing step (S4) of placing a jack (300) having a rod-shaped insertion portion (302) on the base portion; a unit structure placing step (S5) of lifting the unit structure onto the base portion, lowering the unit structure, inserting the insertion portion into the jack insertion portion, and placing the unit structure on the jack; a leveling step (S6) of leveling the unit structure by the jack; an anchor bolt installation step (S9) of installing the anchor bolt (401) in the anchor bolt installation hole; a form forming step (S11) of forming a form (500) on the base portion to surround the lower portion of the unit structure; A foundation formation step (S12) of pouring concrete into the formwork to form a foundation; A unit structure construction method comprising the steps of:

2. The method further includes a marking step (S3) of marking the base portion with marks (201a, 201b) that indicate appropriate horizontal installation positions of the unit structure, 2. The unit structure construction method according to claim 1, wherein in the unit structure placing step, the mark is used to align the horizontal position of the unit structure with respect to the base portion.

3. 3. The unit structure construction method according to claim 1, further comprising a jack fixing step (S8) of fixing the jack to the base portion prior to the form forming step.

4. The upper end of the unit structure has a ceiling beam (13) extending horizontally, A connecting hole (13d) is formed on the upper surface of the ceiling beam, The unit structure construction method of any one of claims 1 to 3, further comprising a connecting step of placing connecting members (651, 652) having communicating holes (651a, 652a) formed therein corresponding to the connecting holes of horizontally adjacent ceiling beams on the upper surfaces of the horizontally adjacent ceiling beams so as to bridge the horizontally adjacent ceiling beams, aligning each of the communicating holes of the connecting members with the connecting holes formed in the horizontally adjacent ceiling beams, inserting bolts (655) into each of the communicating holes and connecting holes, and then screwing nuts (656) onto each of the bolts.

5. The upper end of the unit structure has a ceiling beam (13) extending horizontally, A connecting hole (13d) is formed on the upper surface of the ceiling beam, and a spacer plate (13e) is attached to the connecting hole (13d). The upper unit structure (150) placed on the unit structure has a floor beam (12) extending horizontally at the lower end thereof, A lower connecting hole (12f) is formed on the lower surface of the floor beam, The unit structure construction method of any one of claims 1 to 3, further comprising a connecting step of placing connecting members (651, 652) having communicating holes (651a, 652a) formed therein corresponding to the connecting holes of the horizontally adjacent ceiling beams on the upper surfaces of the horizontally adjacent ceiling beams so as to bridge the horizontally adjacent ceiling beams, then lifting up the upper unit structure and placing it on the ceiling beams of the unit structure, aligning the communicating holes of each of the connecting members with the connecting holes and the lower connecting holes, inserting bolts (655) into each of the communicating holes, connecting holes, and lower connecting holes, and then screwing nuts (656) onto each of the bolts.

6. An outer wall (17) is attached to at least one surface of the unit structure before it is installed on the base portion; A first member (18, 21) having a bent portion (18d, 21d) whose end is bent at an acute angle, and a second member (19, 22) having an engaging portion (19c, 22c) whose end is formed in a U-shape are used, A unit structure construction method as described in any one of claims 1 to 5, further comprising an exterior wall joining process of attaching the second member to the exterior wall of another of the adjacent unit structures, engaging the bent portion with the engaging portion, and attaching the first member to the exterior wall of one of the adjacent unit structures.

Images