JP2019105100A - Foundation structure of building and construction method thereof - Google Patents

Abstract

To provide a foundation structure of a building capable of shortening a construction time and a construction method thereof.SOLUTION: A foundation structure 10 of the building is provided with a steel foundation 30 including an outer circumferential foundation 30A constituted by a plurality of outer circumferential steel materials 40. The plurality of outer circumferential steel materials 40 include at least one finished steel material 40A. The finished steel material 40A includes an outer surface 43B extending between the upper end and the lower end at the end in the width direction. The outer circumferential foundation 30A is configured such that the outer surface 43B is located on the outer circumference of the outer circumferential foundation 30A.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a foundation structure of a building and a method of constructing the same.

  There is known a foundation structure of a building in which a steel foundation is disposed on a concrete foundation for weight reduction and the like. For example, in the foundation structure of a building described in Patent Document 1, an H-shaped steel (7) is disposed on a flat plate-like foundation portion (6) provided on the ground, and an H-shaped steel (7) is formed by an anchor bolt (8). Are connected to the flat base portion (6). One opening formed between one flange of the H-section steel (7) and the other flange opens to the outside of the steel base. A H-section steel (7) placed on the flat foundation (6) is fitted with a concealing panel (12) closing this opening. Furthermore, on the surface of the blinding panel (12), a finishing layer (124) is formed to enhance the design of the foundation structure.

Unexamined-Japanese-Patent No. 2001-303583

  It is preferable that the time required for the construction of the foundation structure can be shortened to shorten the construction period of the building. For example, according to the basic structure of Patent Document 1, it takes time and effort to attach the blinding panel (12) to the H-shaped steel (7), so there is room for improvement in terms of shortening the construction time.

(1) The foundation structure of a building according to the present invention comprises a steel foundation including a plurality of outer peripheral steel members including outer peripheral steel members, the plurality of outer peripheral steel members including at least one finish steel, the finish steel being the finish The outer surface includes an outer surface extending between the upper end and the lower end of the finished steel at a horizontal end orthogonal to the longitudinal direction of the steel, and the outer peripheral foundation is configured such that the outer surface is located at the outer periphery of the outer peripheral foundation.
According to the above foundation structure, when it is necessary to form the finishing layer on at least a part of the steel foundation, the outer circumferential foundation of the steel foundation is positioned so that the outer surface of the finished steel is located at the place where the formation of the finishing layer is planned. Can be Since the outer surface is located on the outer periphery of the outer peripheral foundation, unlike the conventional foundation structure, the finish layer can be formed on the outer surface without attaching a panel for filling the recess of the steel to the finished steel. For this reason, the construction time of a foundation structure can be shortened.

(2) In a preferred example of the foundation structure of a building according to (1), the finished steel material is a channel steel, and the outer surface is a web surface of the channel steel.
Since the existing channel steel is used as a finished steel material, the productivity of the steel foundation is improved.

(3) In a preferable example, in the foundation structure of the building according to (1) or (2), the plurality of outer peripheral steels are all the finished steels.
For this reason, the construction time of a foundation structure can be shortened further.

(4) In a preferable example, in the foundation structure of a building according to any one of (1) to (3), the steel foundation further includes at least one section steel material disposed in the outer circumferential foundation, The outer circumferential steel and the section steel are shaped steels, and the type of the shaped steel of the section steel differs from the type of the shaped steel of the outer circumferential steel.
For this reason, the partition foundation suitable for the structure of a building can be comprised.

(5) In a preferable example, in the foundation structure of the building according to (4), the section steel material is an H-shaped steel.
For this reason, the cross-sectional efficiency of a steel foundation becomes high.

(6) In a preferable example, in the foundation structure of a building according to any one of (1) to (5), the outer circumferential steel material has a housing structure for housing an anchor bolt.
When the foundation structure is formed, steel materials necessary for manufacturing a steel foundation including a plurality of outer peripheral steel materials are transported around a digging groove formed in the ground. In the above-mentioned foundation structure, in this case, the outer periphery foundation can be transported in a state where the anchor bolt is accommodated in the accommodation structure of the outer periphery steel material. For this reason, outer periphery steel materials and an anchor bolt can be conveyed efficiently.

(7) In a preferred example of the foundation structure of a building according to any one of (1) to (6), an anchor bolt attached to the steel foundation and a height of the steel foundation with respect to a ground level It further comprises an adjustment part attached to the anchor bolt so as to be adjustable.
Thus, the height of the steel foundation relative to the ground level can be easily adjusted.

(8) In a preferred example of the foundation structure of a building according to (7), the material constituting the adjustment part is a synthetic resin or concrete.
Since the adjusting parts do not rust, the durability of the concrete foundation formed below the steel foundation to support the steel foundation is enhanced.

(9) A method of constructing a foundation structure of a building according to the present invention includes a placement step of placing a steel foundation including a plurality of outer periphery steel members including outer peripheral steel members in an auxiliary layer via anchor bolts, the auxiliary layer and the above It is a construction method of foundation structure of a building including a formation process which forms a concrete foundation which supports said steel foundation between steel foundations, and it is a construction method of the horizontal direction orthogonal to a longitudinal direction in said arrangement process. The steel foundation is assembled using at least one finished steel material including an outer surface extending between the upper end and the lower end at the end of the outer surface and the outer surface is located at the outer periphery of the outer peripheral foundation.
According to the said construction method, the effect similar to the effect obtained by the foundation structure of said (1) is acquired.

(10) In a preferred example of the method of installing a foundation structure of a building according to (9), the adjusting part attached to the anchor bolt is a step performed between the disposing step and the forming step. The method further includes an adjusting step of adjusting the height of the steel base relative to the ground level by rotating.
According to the above-mentioned construction method, the same effect as the effect obtained by the foundation structure of the above (7) can be obtained.

  According to the foundation structure of the building concerning the present invention and its construction method, the construction time of the foundation structure can be shortened.

Sectional drawing of the foundation structure of the building of embodiment. Top view of foundation structure. The perspective view of the 1st connection part of a steel foundation. The perspective view of the 2nd connection part of a steel foundation. The perspective view of the 3rd connection part of a steel foundation. The perspective view of the 4th connection part of a steel foundation. Front view of an anchor set. The front view which shows the accommodation state of an anchor set. The front view which shows the protrusion state of an anchor set. The figure regarding the 1st process and the 2nd process of the construction method of foundation structure. The figure regarding the 5th process of the construction method of foundation structure.

(Embodiment)
With reference to FIG. 1, the foundation structure 10 in which the building main body 100 was installed is demonstrated. The foundation structure 10 and the building body 100 constitute a building 200. The foundation structure 10 is installed on the ground G so as to straddle the ground level GL in the vertical direction. The pile 11 is placed on the ground G when the ground reinforcement is required. An example of the pile 11 is a steel pipe.

  An example of the building body 100 is an individual house or an apartment house. The building body 100 includes a housing 110 and an outer wall 120. The main elements of the foundation structure 10 are a concrete foundation 20, a steel foundation 30, and a plurality of anchor sets 70. The concrete foundation 20 and the steel foundation 30 are coupled by a plurality of anchor sets 70. Housing 110 is coupled to steel base 30 by bolts 130. The outer wall 120 covers the housing 110.

  A concrete foundation 20 is formed on the auxiliary layer 12. The upper portion 21 of the concrete foundation 20 is located on the ground. The auxiliary layer 12 is formed as needed to assist the manufacture of the concrete base 20. An example of the structure of the auxiliary layer 12 is a single layer structure constituted only by the discarded concrete layer, and a two-layer structure constituted by the discarded concrete layer and the crushed stone layer. The pile 11 supports the concrete foundation 20 via the auxiliary layer 12. The steel foundation 30 is installed on the top 21 of the concrete foundation 20. The building body 100 is installed on a steel foundation 30. The material constituting the concrete foundation 20 and the discarded concrete layer is a strongly alkaline concrete.

  A finish layer 80 is formed on the outer periphery of the steel base 30. The finishing layer 80 constitutes the appearance of the building body 100 together with the outer wall 120 of the building body 100. The material which comprises the finishing layer 80 can be selected arbitrarily. One example is mortar. In the example shown in FIG. 1, the finishing layer 80 is composed of the inner layer 81 and the outer layer 82. The inner layer 81 is formed on the lower ground 30C of the steel base 30 so as to cover the wire mesh 90 joined to the steel base 30. The outer layer 82 is formed to cover the outer surface 21 A of the upper portion 21 of the concrete base 20 and the inner layer 81.

  As shown in FIG. 2, the steel base 30 is composed of a plurality of steel members 40, 50. The steel base 30 is divided into a peripheral base 30A and a partition base 30B. The outer peripheral foundation 30A constitutes an outer shell of the steel foundation 30. The partition base 30B divides the space inside the outer peripheral base 30A. The plurality of steel products 40 and 50 include a plurality of outer circumferential steel materials 40 and a plurality of section steel products 50. The plurality of outer circumferential steel members 40 constitute an outer circumferential base 30A. The plurality of section steel members 50 constitute a partition base 30B. The shape of the outer peripheral foundation 30A and the installation location of the partition foundation 30B are determined according to the structure of the building main body 100.

  Each outer circumferential steel 40 and section steel 50 are connected to the concrete base 20 by a plurality of anchor sets 70. In one example, a plurality of anchor sets 70 are installed at regular intervals so as to form a row along the longitudinal direction of the outer peripheral steel 40 and the section steel 50. In the example shown in FIG. 2, the number of rows of anchor sets 70 provided on each of the outer circumferential steel members 40 and the section steel members 50 is two.

  In a preferred example, the plurality of outer circumferential steels 40 includes at least one finished steel 40A. The finished steel material 40A is a steel material having a structure capable of forming the finished layer 80 without attaching a panel, which is a base of the finished layer 80, to the outer peripheral steel material 40. Finished steel 40A includes base surface 30C (see FIG. 1). The base surface 30C extends between the upper end and the lower end of the finished steel 40A at the end in the horizontal direction orthogonal to the longitudinal direction of the finished steel 40A. An example of the type of the finished steel 40A is a channel steel and a prismatic steel pipe. Channel steels are classified into ordinary channel steels, lightweight channel steels, and lip channel steels.

  In the example shown by FIG. 2, several outer periphery steel materials 40 are all the finishing steel materials 40A. The type of the finished steel 40A is a lightweight channel steel. When steel materials other than the finished steel 40A are included in the plurality of outer peripheral steels 40, the type of the steel can be selected arbitrarily. Examples of steels other than the finished steel 40A are H-shaped steel and I-shaped steel.

  As shown in FIG. 1, the light-weight grooved steel which is the finished steel 40 </ b> A is constituted by the first flange 41, the second flange 42, and the web 43. In the finished steel material 40A, a recess 44 surrounded by the inner surface 41A of the first flange 41, the inner surface 42A of the second flange 42, and the inner surface 43A which is one of the web surfaces of the web 43 is formed. The outer surface 41 B of the first flange 41 is installed on the upper portion 21 of the concrete base 20. The outer surface 42 B of the second flange 42 supports the building body 100. The other outer surface 43B of the web surface of the web 43 is located on the outer periphery of the outer peripheral foundation 30A. The outer surface 43B of the web 43 is a base surface 30C. The outer surface 43B of the web 43 is between the outer surface 41B of the first flange 41 defining the upper end of the finished steel 40A at the widthwise end of the finished steel 40A and the outer surface 42B of the second flange 42 defining the lower end of the finished steel 40A. spread.

  The type of section steel 50 can be selected arbitrarily. One example of the type of section steel 50 is H-shaped steel, channel steel, I-shaped steel, and prismatic steel pipe. In one example, the type of the section steel 50 is different from the type of the peripheral steel 40. In the example shown in FIG. 2, all types of section steel members 50 are H-shaped steels. As shown in FIG. 1, the H-section steel which is the section steel material 50 is constituted by the first flange 51, the second flange 52, and the web 53. In the section steel material 50, a recess 54 surrounded by the inner surface 51A of the first flange 51, the inner surface 52A of the second flange 52, and the web surface 53A of the web 53 is formed. The outer surface 51 B of the first flange 51 is installed on the upper portion 21 of the concrete base 20. The outer surface 52 </ b> B of the second flange 52 supports the building body 100.

  As shown in FIG. 2, the first connection portion 31, the second connection portion 32, the third connection portion 33, and the fourth connection portion 34 are formed on the steel base 30. The first connecting portion 31 is a portion in which two outer peripheral steel members 40 aligned in the longitudinal direction are connected to each other. The second connecting portion 32 is a portion in which two outer steel members 40 arranged to form a corner of the outer peripheral foundation 30A are connected to each other. The third connecting portion 33 is a portion in which the outer peripheral steel material 40 and the division steel material 50 which are disposed orthogonal to each other are connected to each other. The fourth connection portion 34 is a portion where the outer peripheral steel material 40 and the section steel material 50 aligned in the longitudinal direction are connected to each other. A connection plate 60 (see FIGS. 3 to 6) for connecting the steel materials to each other is joined to a portion of each of the connecting portions 31 to 34 in the outer peripheral steel material 40 and the section steel material 50. An example of the joining means is welding.

  FIG. 3 shows the end portions in the longitudinal direction of the two outer steel members 40 constituting the first connecting portion 31. A first plate 61, which is an example of the connection plate 60, is joined to an end portion in the longitudinal direction of the outer peripheral steel material 40. The first plate 61 is joined to the outer peripheral steel 40 so as to close the opening of the recess 44 opened in the longitudinal direction of the outer peripheral steel 40. Specifically, the inner surface 61A of the first plate 61 is joined to the end surface of the first flange 41, the end surface of the second flange 42, and the end surface of the web 43. The first plate 61 is formed with a plurality of holes 61C that open to the inner surface 61A and the outer surface 61B of the first plate 61.

  In the first connection portion 31, the outer surface 61B of the first plate 61 of one outer peripheral steel 40 and the outer surface 61B of the first plate 61 of the other outer peripheral steel 40 are butted. A nut 67 is coupled to a bolt 66 inserted into each of the holes 61C of each first plate 61. The two outer steel members 40 are connected by the combined bolt 66 and nut 67. The bolt 66 and the nut 67 are disposed in the recess 44 of the outer circumferential steel 40. Therefore, various operations including formation of the finishing layer 80 are not hindered by the bolt 66 and the nut 67.

  FIG. 4 shows the end portions in the longitudinal direction of the two outer steel members 40 constituting the second connecting portion 32. The first plate 61 is joined to the end portion in the longitudinal direction of one outer peripheral steel material 40 in the same manner as the outer peripheral steel material 40 constituting the first connecting portion 31. The first plate 61 is also joined to the longitudinal end of the other outer peripheral steel 40. However, the hole 61 </ b> C is not formed in the first plate 61. A second plate 62, which is an example of a connection plate 60, is further joined to an end of the other outer periphery steel 40 in the longitudinal direction.

  The second plate 62 is joined to the outer peripheral steel material 40 so as to close the opening of the recess 44 opened in the lateral direction of the outer peripheral steel material 40. Specifically, the inner surface 62A of the second plate 62 is joined to the end of the inner surface 41A of the first flange 41, the end of the inner surface 42A of the second flange 42, and the end of the inner surface 61A of the first plate 61. . The second plate 62 is formed with a plurality of holes 62C that open to the inner surface 62A and the outer surface 62B of the second plate 62.

  In the second connection portion 32, the outer surface 61B of the first plate 61 of one of the outer peripheral steel members 40 and the outer surface 62B of the second plate 62 of the other outer peripheral steel member 40 are butted. A nut 67 is coupled to a bolt 66 inserted into each of the holes 61C, 62C of the respective plates 61, 62. The two outer steel members 40 are connected by the combined bolt 66 and nut 67. The bolt 66 and the nut 67 are disposed in the recess 44 of the outer circumferential steel 40.

  FIG. 5 shows the middle portion of the outer peripheral steel material 40 constituting the third connecting portion 33 and the end in the longitudinal direction of the section steel material 50. The third plate 63, which is an example of the connection plate 60, is joined to the middle portion of the outer peripheral steel material 40. The third plate 63 is joined to the outer peripheral steel 40 so as to divide the recess 44 of the outer peripheral steel 40 in the longitudinal direction. Specifically, the bottom surface of the third plate 63 is joined to the inner surface 41A of the first flange 41, and the top surface of the third plate 63 is joined to the inner surface 42A of the second flange 42. One side of the third plate 63 Are bonded to the inner surface 43 A of the web 43. The third plate 63 is formed with a plurality of holes 63C that open to the first main surface 63A and the second main surface 63B of the third plate 63.

  The fourth plate 64, which is an example of the connection plate 60, is joined to the longitudinal end of the section steel 50. The fourth plate 64 is joined to the section steel 50 so as to protrude from the end surface of the section steel 50 in the longitudinal direction. Specifically, the first major surface 64A of the fourth plate 64 is bonded to the web surface 53A of the web 53. The fourth plate 64 is formed with a plurality of holes 64C that open to the first main surface 64A and the second main surface 64B of the fourth plate 64.

  In the third connecting portion 33, the first major surface 63A of the third plate 63 of the outer peripheral steel 40 and the first major surface 64A of the fourth plate 64 of the section steel 50 are butted. A nut 67 is coupled to a bolt 66 inserted into each of the holes 63C, 64C of each plate 63, 64. The outer circumferential steel 40 and the section steel 50 are connected by the bolt 66 and the nut 67 which are joined. The bolt 66 and the nut 67 are disposed in the recess 44 of the outer circumferential steel 40.

  FIG. 6 shows the end portions in the longitudinal direction of the outer peripheral steel material 40 and the section steel material 50 that constitute the fourth connecting portion 34. The first plate 61 is joined to the end portion in the longitudinal direction of the outer circumferential steel material 40 in the same manner as the outer circumferential steel material 40 constituting the first connecting portion 31. A fifth plate 65, which is an example of the connection plate 60, is joined to an end of the section steel 50 in the longitudinal direction. The fifth plate 65 is joined to the section steel 50 so as to close the opening of each recess 54 opened in the longitudinal direction of the section steel 50. Specifically, the inner surface 65A of the fifth plate 65 is joined to the end face of the first flange 51, the end face of the second flange 52, and the end face of the web 53. The fifth plate 65 is formed with a plurality of holes 65C that open to the inner surface 65A and the outer surface 65B of the fifth plate 65.

  In the fourth connecting portion 34, the outer surface 61B of the first plate 61 of the outer peripheral steel 40 and the outer surface 65B of the fifth plate 65 of the section steel 50 are butted. A nut 67 is coupled to a bolt 66 inserted into each of the holes 61C, 65C of the respective plates 61, 65. The outer circumferential steel 40 and the section steel 50 are connected by the bolt 66 and the nut 67 which are joined. The bolt 66 and the nut 67 are respectively disposed in the recess 44 of the outer peripheral steel 40 or the recess 54 of the section steel 50.

  The specific configuration of the anchor set 70 will be described with reference to FIG. The elements constituting the anchor set 70 are an anchor bolt 71, a plurality of nuts 72, a fixing plate 73, and an adjustment part 74. The anchor bolt 71 connects the steel base 30 and the concrete base 20. The anchor bolt 71 is inserted into a hole (not shown) formed in the first flange 41 of the outer peripheral steel 40. In the state in which the concrete base 20 is formed, the anchor bolt 71 is embedded in the concrete base 20.

  The anchor bolt 71 is divided into a first portion 71A and a second portion 71B based on the first flange 41. The first portion 71A includes the first end 71C of the anchor bolt 71, and protrudes from the inner surface 41A of the first flange 41 toward the recess 44. The second portion 71B includes the second end 71D of the anchor bolt 71 and protrudes from the outer surface 41B of the first flange 41 toward the concrete foundation 20 side. The length of the second portion 71B is longer than the length of the first portion 71A. The fixing plate 73 enhances the bonding strength between the concrete base 20 and the anchor bolt 71. The fixing plate 73 is attached to a portion of the second portion 71B near the second end 71D. The relationship between the section steel 50 and the anchor set 70 is the same as described above.

  The plurality of nuts 72 includes a first nut 72A, a second nut 72B, a third nut 72C, and a fourth nut 72D. The first nut 72A and the second nut 72B are coupled to the anchor bolt 71 so as to sandwich the first flange 41. Specifically, the first nut 72A is coupled to the first portion 71A of the anchor bolt 71. The first nut 72 </ b> A contacts the inner surface 41 </ b> A of the first flange 41. The second nut 72B is coupled to the second portion 71B of the anchor bolt 71. The second nut 72B contacts the outer surface 41B of the first flange 41.

  The third nut 72C and the fourth nut 72D are coupled to the anchor bolt 71 so as to sandwich the fixing plate 73. Specifically, the third nut 72C is coupled to the first end 71C side of the fixing plate 73 of the second portion 71B of the anchor bolt 71. The third nut 72 </ b> C contacts one of the main surfaces of the fixing plate 73. The fourth nut 72D is coupled to the second end 71D side of the fixing plate 73 of the second portion 71B of the anchor bolt 71. The fourth nut 72D contacts the other main surface of the fixing plate 73.

  The adjustment component 74 adjusts the height of the steel foundation 30 with respect to the ground level GL. In one example, adjustment component 74 is a nut that is coupled to anchor bolt 71. The material which constitutes adjustment part 74 can be chosen arbitrarily. In a preferred example, the adjustment component 74 is made of a material having high corrosion resistance. An example is synthetic resin or concrete. If moisture intrudes between the auxiliary layer 12 and the concrete foundation 20 in a state where the adjustment component 74 is covered by the concrete foundation 20, the water may adhere to the adjustment component 74. Since the adjustment component 74 has high corrosion resistance, it does not easily corrode even when water adheres. Therefore, the progress of neutralization of the concrete base 20 is suppressed, and the life of the concrete base 20 is extended.

  The adjustment component 74 is coupled to the second end 71 D of the anchor bolt 71. The shape of the adjustment part 74 is approximately a truncated cone. Top surface 74D and bottom surface 74E of adjustment component 74 are planes. The area of the bottom surface 74E is larger than the area of the top surface 74D. The top surface 74D faces the fourth nut 72D in the vertical direction. The bottom surface 74E is disposed on the auxiliary layer 12. A hole 74A is formed in the center of the adjustment part 74 along the height direction of the adjustment part 74. An internal thread 74C coupled with the anchor bolt 71 is formed on the inner circumferential surface 74B forming the hole 74A.

  FIG. 11 shows a temporary installation state where the steel base 30 is installed on the auxiliary layer 12 via the anchor set 70 and the concrete base 20 is not formed. In the temporary installation state, a projecting state is formed in which the majority of the anchor set 70 is disposed below the respective steel members 40, 50 so as to support the steel base 30. The relationship between the anchor set 70 and the steel members 40, 50 in the projecting state is substantially the same as the relationship shown in FIG.

  In the temporary installation state, the adjustment component 74 can be rotated relative to the anchor bolt 71. The rotation of the adjustment component 74 relative to the anchor bolt 71 causes the anchor bolt 71 to move vertically upward or downward depending on the direction of rotation. The steel members 40 and 50 move in the vertical direction as the plurality of anchor bolts 71 coupled to the steel members 40 and 50 move in the vertical direction. Therefore, the height of the steel base 30 relative to the ground level GL can be adjusted in accordance with the amount of rotation of the adjustment component 74 relative to the anchor bolt 71. In a state where the steel base 30 is lowered to the lowest position in the adjustment range of the height of the steel base 30 (hereinafter referred to as “lower limit state”), the fourth nut 72D contacts the top surface 74D of the adjustment component 74 and anchors The downward movement of the bolt 71 is restricted.

  The depth of the hole 74A is deeper than the length of the second portion 71B of the anchor bolt 71 which protrudes from the fourth nut 72D. In a preferred example, the depth of the hole 74A is determined such that a space 75 is formed between the second end 71D of the anchor bolt 71 and the auxiliary layer 12 in the lower limit state of the steel base 30. Therefore, the second end 71D of the anchor bolt 71 is prevented from coming into contact with the auxiliary layer 12 as the height of the steel base 30 is adjusted.

  The height LA of the adjustment part 74 can be arbitrarily selected. In one example, the height LA is determined based on the relationship between the joint strength of the anchor bolt 71 and the concrete base 20 and the cover thickness of the anchor bolt 71. The height LA is the distance between the top surface 74D of the adjustment component 74 and the bottom surface 74E. An example of the maximum value of height LA is 100 mm. When the height LA is 100 mm or less, the bonding strength between the concrete base 20 and the anchor bolt 71 is high. An example of the minimum value of height LA is 40 mm and 60 mm. When the height LA is 40 mm or more, a large cover thickness of the anchor bolt 71 can be secured. When the height LA is 60 mm or more, the cover bolt thickness of the anchor bolt 71 can be further increased. An example of the range which height LA can take is 40 mm-100 mm, 60 mm-100 mm.

  As shown in FIG. 8, the perimeter steel 40 further comprises a receiving structure 46 for receiving the anchor set 70. The section steel material 50 also has a similar accommodation structure. Here, details of the housing structure 46 will be exemplified taking the outer peripheral steel material 40 as an example. The housing structure 46 is constituted by the recess 44, the hole 41 C of the first flange 41, and the hole 42 C of the second flange 42. The holes 41C open in the inner surface 41A and the outer surface 41B of the first flange 41, respectively. The holes 42C open to the inner surface 42A and the outer surface 42B of the second flange 42, respectively. Each hole 41C, 42C is formed coaxially. The anchor bolt 71 is accommodated in the accommodation structure 46 by inserting the anchor bolt 71 into each of the holes 41 C and 42 C so that the anchor bolt 71 straddles the entire recess 44. Hereinafter, this state is referred to as "accommodated state". The bolt 130 connecting the frame 110 of the building body 100 and the steel base 30 is inserted into the hole 42C of the second flange 42 (see FIG. 1).

  In the storage state, the outer circumferential steel 40 and the anchor set 70 have the following relationship. A portion including the first end 71C of the anchor bolt 71 protrudes from the outer surface 42B of the second flange 42. The first nut 72A and the second nut 72B are coupled to the anchor bolt 71 so as to sandwich the second flange 42. A portion including the second end 71D of the anchor bolt 71 protrudes from the outer surface 41B of the first flange 41. The third nut 72C, the fourth nut 72D, the fixing plate 73, and the adjustment component 74 are coupled to this portion. The third nut 72C contacts the outer surface 41B of the first flange 41. The movement of the anchor bolt 71 with respect to the outer peripheral steel 40 is restricted by the nuts 72A to 72C.

  When the anchor set 70 is installed on the auxiliary layer 12, as shown in FIG. 9, the anchor bolt 71 housed in the housing structure 46 is in a projecting state in which the anchor bolt 71 is pulled out from the recess 44. The relationship between each steel material 40, 50 and the anchor set 70 in the projecting state is similar to the relationship shown in FIG. The length of the anchor bolt 71 located outside the recess 44 in the accommodation state of FIG. 8 is shorter than the length of the anchor bolt 71 located outside the recess 44 in the protruding state of FIG. For this reason, when the outer peripheral steel material 40 is transported in the accommodation state, the bulk of the outer peripheral steel material 40 to which the anchor set 70 is coupled is reduced, and the workability regarding transportation is improved. In addition, the above-mentioned matter relevant to the accommodation state of anchor set 70, and conveyance is common also to section steel material 50.

  An example of the construction method of the foundation structure 10 is demonstrated with reference to FIGS. 8-11. The construction method of the foundation structure 10 includes first to ninth steps. The fourth step is an example of the arrangement step. The fifth step is an example of the adjustment step. The eighth step is an example of the forming step.

  As shown in FIG. 10, in the first step, a digging groove GA is formed in the ground G. Next, a plurality of piles 11 are driven at the bottom GB of the digging groove GA. In the second step, a discarded concrete layer is formed as the auxiliary layer 12 at the bottom GB of the digging groove GA. In the third step, the plurality of outer peripheral steel members 40 and the plurality of section steel members 50 are carried around the digging groove GA. The anchor set 70 is joined to the outer circumferential steel 40 and the section steel 50 so that the accommodation state shown in FIG. Since each steel material 40, 50 and the anchor set 70 are conveyed together, the efficiency regarding conveyance of materials improves. Further, since most of the anchor bolt 71 is accommodated in the recess 44 of the outer peripheral steel 40 or the recess 54 of the section steel 50 in the storage state, the bulk of each steel 40, 50 including the anchor set 70 is reduced. Ease of transportation work is improved.

  In the fourth step, each steel material 40, 50 is placed on the auxiliary layer 12 via the anchor set 70. Specifically, this installation is carried out as follows. First, each steel material 40, 50 is disposed above the auxiliary layer 12 by the transport machine. Each steel material 40, 50 is supported by the transport machine until a temporary installation state in which each steel material 40, 50 is supported by the anchor set 70 is formed. Next, the first nut 72A is removed from the anchor bolt 71. Next, the anchor bolt 71 is pulled out from the recess 44, 54 so that the first end 71C of the anchor bolt 71 is separated from the inner surface 42A, 52A of the second flange 42, 52 in the recess 44, 54. Next, the second nut 72B is removed from the anchor bolt 71. Next, all of the anchor bolts 71 are pulled out of the recesses 44, 54. Next, the second nut 72B is coupled to the anchor bolt 71. Next, one including the first end 71C of the anchor bolt 71 such that the distance from the inner surface 41A, 51A of the first flange 41, 51 to the first end 71C of the anchor bolt 71 is a predetermined distance defined in advance. The parts are arranged in the recesses 44, 54. Next, the first nut 72A is coupled to the anchor bolt 71. By the operation up to this point, the projecting state shown in FIG. 9 is formed. Next, the adjustment component 74 is placed on the auxiliary layer 12.

  In the fifth step, the height of the steel base 30 with respect to the ground level GL is adjusted. Specifically, this adjustment is performed as follows. First, the height of the reference portion of each steel material 40, 50 with respect to the ground level GL (hereinafter, "base height") is measured. The reference site is arbitrarily determined. In one example, the reference portion is the outer surface 42B, 52B of the second flange 42, 52 of each steel 40, 50. Next, for the steel materials 40 and 50 whose measured base height is not included in the reference range, the adjustment component 74 is turned so that the base height is included in the reference range. The adjustment of the base height of the steel materials 40, 50 by the adjustment parts 74 is performed for each of the steel materials 40, 50. Adjustment of the base height is carried out until the base height of all the steel products 40, 50 is included in the reference range.

  In the sixth step, the steel products 40 and 50 are connected using the bolts 66 and the nuts 67. The first connecting portion 31 is formed by connecting the outer peripheral steel members 40 (see FIG. 3) aligned in the longitudinal direction. The second connecting portion 32 is formed by connecting the outer peripheral steel materials 40 (see FIG. 4) arranged to form a corner (see FIG. 4). The third connecting portion 33 is formed by connecting the outer peripheral steel members 40 and the divided steel members 50 (see FIG. 5) arranged to be orthogonal to each other. The fourth connecting portion 34 is formed by connecting the outer peripheral steel members 40 and the divided steel members 50 (see FIG. 6) aligned in the longitudinal direction.

  In the seventh step, a mold (not shown) for forming the concrete base 20 is installed in the digging groove GA. In the eighth step, concrete is poured into the formwork. By hardening the concrete, a concrete foundation 20 corresponding to the shape of the formwork is formed. In the ninth step, the finishing layer 80 (see FIG. 1) is formed on the steel base 30. Specifically, this formation is performed as follows. First, the wire mesh 90 is joined to the lower ground 30C of the finished steel 40A which is the outer peripheral steel 40. Next, the inner layer 81 of the finishing layer 80 is formed on the base surface 30C so as to be entangled with the wire mesh 90. Next, the outer layer 82 is formed on the cured inner layer 81. Curing of the outer layer 82 completes the finish layer 80.

  The operation and effects of the foundation structure 10 will be described. According to the foundation structure 10, when it is necessary to form the finish layer 80 on at least a part of the steel foundation 30, the lower ground 30C of the finish steel 40A is located at a place where the formation of the finish layer 80 is planned. The outer peripheral foundation 30A of the steel foundation 30 can be assembled. Since the base surface 30C is located on the outer periphery of the outer peripheral foundation 30A, unlike the conventional foundation structure, the finish layer 80 can be formed without attaching a panel for filling the recess of the steel to the finish steel 40A. For this reason, the construction time of the foundation structure 10 can be shortened.

  In addition, the said embodiment is an illustration of the foundation structure of the building regarding this invention, and the form which the construction method can take, and it is not intending limiting the form. The foundation structure of a building and its installation method according to the present invention may take a form different from the form exemplified in the above embodiment. An example is a form in which part of the configuration of the embodiment is replaced, changed or omitted, or a configuration in which a new configuration is added to the embodiment.

10: Foundation structure 12: Auxiliary layer 20: Concrete foundation 30: Steel foundation 30A: Peripheral foundation 40: Peripheral steel 40A: Finished steel 43B: Outer surface (web surface)
46: Containment structure 50: Section steel 71: Anchor bolt 74: Adjustment component 80: Finish layer GL: Ground level

Claims (10)

It has a steel foundation that includes a perimeter foundation composed of multiple perimeter steel products,
The plurality of outer periphery steels include at least one finish steel,
The finished steel includes an outer surface extending between the upper end and the lower end of the finished steel at a horizontal end orthogonal to the longitudinal direction of the finished steel,
The foundation structure of a building, wherein the outer periphery foundation is configured such that the outer surface is located on the outer periphery of the outer periphery foundation. The finished steel is a channel steel,
The foundation structure of a building according to claim 1, wherein the outer surface is a web surface of the channel steel. The foundation structure of a building according to claim 1, wherein the plurality of outer peripheral steels are all the finished steels. The steel foundation further comprises at least one section steel material disposed within the perimeter foundation,
The outer circumferential steel and the section steel are shaped steels,
The foundation structure of the building according to any one of claims 1 to 3, wherein the type of the section steel of the section steel is different from the type of the section steel of the outer circumferential steel. The foundation structure of a building according to claim 4, wherein the section steel material is an H-shaped steel. The foundation structure of a building according to any one of claims 1 to 5, wherein the outer circumferential steel is provided with a housing structure for housing an anchor bolt. An anchor bolt attached to the steel base;
The foundation structure of a building according to any one of claims 1 to 6, further comprising an adjustment part attached to the anchor bolt so as to adjust the height of the steel base relative to a ground level. The foundation structure of a building according to claim 7, wherein a material constituting the adjustment part is a synthetic resin or concrete. An arrangement step of arranging a steel foundation including an outer periphery foundation composed of a plurality of outer periphery steel members in the auxiliary layer via anchor bolts;
It is a construction method of foundation structure of a building including a forming process which forms a concrete foundation which supports the steel foundation between the auxiliary layer and the steel foundation,
In the placement step, the steel is made of at least one finish steel including an outer surface extending between an upper end and a lower end at horizontal ends orthogonal to the longitudinal direction, and the outer surface is located on the outer periphery of the outer peripheral foundation Build a foundation The construction method of the foundation structure of a building. A step performed between the placing step and the forming step, and further comprising an adjusting step of adjusting the height of the steel base relative to the ground level by rotating an adjusting part attached to the anchor bolt. The construction method of the foundation structure of the building of Claim 9.