JP7027861B2 - Foundation structure of the building - Google Patents

Description

The present invention relates to the basic structure of a building.

The foundation structure of a building in which a steel foundation is placed on a concrete foundation for weight reduction and the like is known. For example, in the foundation structure of a building described in Patent Document 1, the H-shaped steel (7) is arranged on a flat plate-shaped foundation portion (6) provided on the ground, and the H-shaped steel (7) is provided by an anchor bolt (8). Is connected to the flat plate-shaped foundation portion (6). One opening formed between one flange and the other flange of the H-section steel (7) opens to the outside of the steel foundation. A blind panel (12) that closes this opening is attached to the H-shaped steel (7) installed in the flat foundation portion (6). Further, a finishing layer (124) for enhancing the design of the basic structure is formed on the surface of the blindfold panel (12).

Japanese Unexamined Patent Publication No. 2001-303583

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

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

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

(3) In a preferred example, in the basic structure of the building according to (1) or (2), the plurality of outer peripheral steel materials are all the finished steel materials.
Therefore, the construction time of the foundation structure can be further shortened.

(4) In a preferred example, in the foundation structure of the building according to any one of (1) to (3), the steel foundation further includes at least one section steel material arranged in the outer peripheral foundation. The outer peripheral steel material and the section steel material are shaped steels, and the type of the shaped steel of the section steel material is different from the type of the shaped steel of the outer peripheral steel material.
Therefore, a partition foundation suitable for the structure of the building can be constructed.

(5) In a preferred example, in the foundation structure of the building described in (4), the section steel material is H-shaped steel.
Therefore, the cross-sectional efficiency of the steel foundation is high.

(6) In a preferred example, in the foundation structure of the building according to any one of (1) to (5), the outer peripheral steel material includes an accommodation structure for accommodating anchor bolts.
When the foundation structure is formed, the steel materials necessary for manufacturing the steel foundation, including a plurality of outer peripheral steel materials, are transported around the excavation ditch formed in the ground. In the above foundation structure, in this case, the outer peripheral foundation can be conveyed with the anchor bolts housed in the outer peripheral steel material accommodating structure. Therefore, the outer peripheral steel material and the anchor bolt can be efficiently conveyed.

(7) In a preferred example, in the foundation structure of the building according to any one of (1) to (6), the anchor bolts attached to the steel foundation and the height of the steel foundation with respect to the ground level are set. Further, an adjusting component attached to the anchor bolt is provided so as to be adjustable.
Therefore, the height of the steel foundation with respect to the ground level can be easily adjusted.

(8) In a preferred example, in the basic structure of the building described in (7), the material constituting the adjust component is 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 increased.

(9) The method of constructing the foundation structure of a building according to the present invention includes an arrangement step of arranging a steel foundation including an outer peripheral foundation composed of a plurality of outer peripheral steel materials in an auxiliary layer via anchor bolts, and the auxiliary layer and the above. A method of constructing a foundation structure of a building including a forming step of forming a concrete foundation supporting the steel foundation between the steel foundation and the steel foundation. In the placement step, the horizontal direction orthogonal to the longitudinal direction is used. At least one finished steel material including an outer surface extending between the upper end and the lower end is used, and the steel foundation is assembled so that the outer surface is located on the outer periphery of the outer peripheral foundation.
According to the above-mentioned construction method, the same effect as the effect obtained by the above-mentioned foundation structure (1) can be obtained.

(10) In a preferred example, in the construction method of the foundation structure of the building according to (9), the step is a step carried out between the placement step and the formation step, and the adjust component attached to the anchor bolt is used. It further comprises an adjustment step of adjusting the height of the steel foundation with respect to the ground level by rotation.
According to the above construction method, the same effect as the effect obtained by the above-mentioned foundation structure (7) can be obtained.

According to the foundation structure of a building and the construction method thereof according to the present invention, the construction time of the foundation structure can be shortened.

Sectional drawing of the foundation structure of the building of embodiment. Top view of the foundation structure. Perspective view of the first connecting portion of the steel foundation. Perspective view of the second connecting portion of the steel foundation. Perspective view of the third connecting portion of the steel foundation. Perspective view of the fourth connecting portion of the steel foundation. Front view of the anchor set. Front view showing the accommodation state of the anchor set. Front view showing the protruding state of the anchor set. The figure regarding the 1st process and the 2nd process of the construction method of a foundation structure. The figure regarding the 5th process of the construction method of a foundation structure.

(Embodiment)
With reference to FIG. 1, the foundation structure 10 in which the building body 100 is installed will be described. The foundation structure 10 and the building body 100 constitute the building 200. The foundation structure 10 is installed on the ground G so as to straddle the ground level GL in the vertical direction. When ground reinforcement is required, piles 11 are driven into the ground G. An example of 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 skeleton 110 and an outer wall 120. The main elements constituting 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 connected by a plurality of anchor sets 70. The skeleton 110 is connected to the steel foundation 30 by bolts 130. The outer wall 120 covers the skeleton 110.

The 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 in the production of the concrete foundation 20. An example of the structure of the auxiliary layer 12 is a single-layer structure composed of only a waste concrete layer and a two-layer structure composed of a waste concrete layer and a crushed stone layer. The pile 11 supports the concrete foundation 20 via the auxiliary layer 12. The steel foundation 30 is installed on the upper portion 21 of the concrete foundation 20. The building body 100 is installed on the steel foundation 30. The material constituting the concrete foundation 20 and the discarded concrete layer is strongly alkaline concrete.

A finishing layer 80 is formed on the outer periphery of the steel foundation 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 constituting the finishing layer 80 can be arbitrarily selected. One example is mortar. In the example shown in FIG. 1, the finishing layer 80 is composed of an inner layer 81 and an outer layer 82. The inner layer 81 is formed on the lower ground 30C of the steel foundation 30 so as to cover the wire mesh 90 joined to the steel foundation 30. The outer layer 82 is formed so as to cover the outer surface 21A of the upper portion 21 of the concrete foundation 20 and the inner layer 81.

As shown in FIG. 2, the steel foundation 30 is composed of a plurality of steel materials 40 and 50. The steel foundation 30 is divided into an outer peripheral foundation 30A and a partition foundation 30B. The outer peripheral foundation 30A constitutes the outer shell of the steel foundation 30. The partition foundation 30B partitions the space inside the outer peripheral foundation 30A. The plurality of steel materials 40 and 50 include a plurality of outer peripheral steel materials 40 and a plurality of compartment steel materials 50. The plurality of outer peripheral steel materials 40 constitute the outer peripheral foundation 30A. The plurality of compartment steel materials 50 constitute a partition foundation 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 body 100.

The individual perimeter steel 40 and compartment steel 50 are coupled to the concrete foundation 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 rows along the longitudinal direction of the outer peripheral steel material 40 and the section steel material 50. In the example shown in FIG. 2, the rows of the anchor sets 70 provided on the individual outer peripheral steel materials 40 and the section steel materials 50 are two rows.

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

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

As shown in FIG. 1, the lightweight channel steel, which is the finished steel material 40A, is composed of a first flange 41, a second flange 42, and a web 43. The finished steel material 40A is formed with a recess 44 surrounded by an inner surface 41A of the first flange 41, an inner surface 42A of the second flange 42, and an inner surface 43A which is one of the web surfaces of the web 43. The outer surface 41B of the first flange 41 is installed on the upper portion 21 of the concrete foundation 20. The outer surface 42B of the second flange 42 supports the building body 100. The outer surface 43B, which is the other side 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 the 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 the section steel material 50 can be arbitrarily selected. An example of the type of section steel 50 is H-section steel, channel steel, I-section steel, and prismatic steel pipe. In one example, the type of compartment steel 50 is different from the type of outer peripheral steel 40. In the example shown in FIG. 2, the type of all section steels 50 is H-section steel. As shown in FIG. 1, the H-section steel 50 is composed of a first flange 51, a second flange 52, and a web 53. The section steel 50 is formed with a recess 54 surrounded by an inner surface 51A of the first flange 51, an inner surface 52A of the second flange 52, and a web surface 53A of the web 53. The outer surface 51B of the first flange 51 is installed on the upper portion 21 of the concrete foundation 20. The outer surface 52B of the second flange 52 supports the building body 100.

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

FIG. 3 shows the longitudinal end portions of the two outer peripheral steel members 40 constituting the first connecting portion 31. The first plate 61, which is an example of the connecting plate 60, is joined to the end portion of the outer peripheral steel material 40 in the longitudinal direction. The first plate 61 is joined to the outer peripheral steel material 40 so as to close the opening of the recess 44 that opens in the longitudinal direction of the outer peripheral steel material 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 connecting portion 31, the outer surface 61B of the first plate 61 of one outer peripheral steel material 40 and the outer surface 61B of the first plate 61 of the other outer peripheral steel material 40 are butted against each other. A nut 67 is coupled to a bolt 66 inserted into each of the holes 61C of each first plate 61. The two outer peripheral steel materials 40 are connected by the combined bolt 66 and nut 67. The bolt 66 and the nut 67 are arranged in the recess 44 of the outer peripheral steel material 40. Therefore, various operations including the formation of the finishing layer 80 are not hindered by the bolt 66 and the nut 67.

FIG. 4 shows the longitudinal end portions of the two outer peripheral steel members 40 constituting the second connecting portion 32. The first plate 61 is joined to the end portion of the outer peripheral steel material 40 in the longitudinal direction 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 end portion of the other outer peripheral steel material 40 in the longitudinal direction. However, the hole 61C is not formed in the first plate 61. A second plate 62, which is an example of the connecting plate 60, is further joined to the end portion in the longitudinal direction of the other outer peripheral steel material 40.

The second plate 62 is joined to the outer peripheral steel material 40 so as to close the opening of the recess 44 that opens 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 into the inner surface 62A and the outer surface 62B of the second plate 62.

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

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

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

At the third connecting portion 33, the first main surface 63A of the third plate 63 of the outer peripheral steel material 40 and the first main surface 64A of the fourth plate 64 of the section steel material 50 are butted against each other. A nut 67 is coupled to a bolt 66 inserted into each of the holes 63C and 64C of the plates 63 and 64. The outer peripheral steel material 40 and the section steel material 50 are connected by the combined bolts 66 and nuts 67. The bolt 66 and the nut 67 are arranged in the recess 44 of the outer peripheral steel material 40.

FIG. 6 shows the end portions of the outer peripheral steel material 40 and the section steel material 50 constituting the fourth connecting portion 34 in the longitudinal direction. The first plate 61 is joined to the end portion of the outer peripheral steel material 40 in the longitudinal direction in the same manner as the outer peripheral steel material 40 constituting the first connecting portion 31. A fifth plate 65, which is an example of the connecting plate 60, is joined to the end portion in the longitudinal direction of the section steel material 50. The fifth plate 65 is joined to the section steel material 50 so as to close the opening of each recess 54 that opens in the longitudinal direction of the section steel material 50. Specifically, the inner surface 65A of the fifth plate 65 is joined to the end surface of the first flange 51, the end surface of the second flange 52, and the end surface 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.

At the fourth connecting portion 34, the outer surface 61B of the first plate 61 of the outer peripheral steel material 40 and the outer surface 65B of the fifth plate 65 of the compartmentalized steel material 50 are butted against each other. A nut 67 is coupled to a bolt 66 inserted into each of the holes 61C and 65C of the plates 61 and 65. The outer peripheral steel material 40 and the section steel material 50 are connected by the combined bolts 66 and nuts 67. The bolt 66 and the nut 67 are respectively arranged in the recess 44 of the outer peripheral steel material 40 or the recess 54 of the partition steel material 50.

A specific configuration of the anchor set 70 will be described with reference to FIG. 7. The elements constituting the anchor set 70 are an anchor bolt 71, a plurality of nuts 72, a fixing plate 73, and an adjusting component 74. The anchor bolt 71 connects the steel foundation 30 and the concrete foundation 20. The anchor bolt 71 is inserted into a hole (not shown) formed in the first flange 41 of the outer peripheral steel material 40. In the state where the concrete foundation 20 is formed, the anchor bolt 71 is embedded in the concrete foundation 20.

The anchor bolt 71 is divided into a first portion 71A and a second portion 71B with reference to the first flange 41. The first portion 71A includes the first end portion 71C of the anchor bolt 71, and projects from the inner surface 41A of the first flange 41 toward the recess 44 side. The second portion 71B includes the second end portion 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 joint strength between the concrete foundation 20 and the anchor bolt 71. The fixing plate 73 is attached to a portion of the second portion 71B near the second end portion 71D. The relationship between the section steel material 50 and the anchor set 70 is the same as described above.

The plurality of nuts 72 include 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 72A comes into contact with the inner surface 41A 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 comes into contact with 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 second portion 71B of the anchor bolt 71 with respect to the fixing plate 73. The third nut 72C comes into contact with one main surface of the fixing plate 73. The fourth nut 72D is coupled to the second end 71D side of the second portion 71B of the anchor bolt 71 with respect to the fixing plate 73. The fourth nut 72D contacts the other main surface of the fixing plate 73.

The adjusting component 74 adjusts the height of the steel foundation 30 with respect to the ground level GL. In one example, the adjusting component 74 is a nut that is coupled to the anchor bolt 71. The material constituting the adjusting component 74 can be arbitrarily selected. In a preferred example, the adjusting component 74 is made of a material having high corrosion resistance. One example is synthetic resin or concrete. If the adjusting component 74 is covered with the concrete foundation 20 and moisture enters between the auxiliary layer 12 and the concrete foundation 20, the moisture may adhere to the adjusting component 74. Since the adjusting component 74 has high corrosion resistance, it does not easily corrode even when moisture adheres to it. Therefore, the progress of neutralization of the concrete foundation 20 is suppressed, and the life of the concrete foundation 20 is extended.

The adjusting component 74 is coupled to the second end 71D of the anchor bolt 71. The shape of the adjusting component 74 is approximately a truncated cone. The top surface 74D and the bottom surface 74E of the adjusting component 74 are flat surfaces. 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 installed on the auxiliary layer 12. A hole 74A along the height direction of the adjusting component 74 is formed in the central portion of the adjusting component 74. A female screw 74C to be connected to the anchor bolt 71 is formed on the inner peripheral surface 74B forming the hole 74A.

FIG. 11 shows a temporary installation state in which the steel foundation 30 is installed on the auxiliary layer 12 via the anchor set 70 and the concrete foundation 20 is not formed. In the temporary installation state, a protruding state is formed in which most of the anchor set 70 is arranged below the steel materials 40 and 50 so as to support the steel foundation 30. The relationship between the anchor set 70 and the steel materials 40 and 50 in the protruding state is substantially the same as the relationship shown in FIG. 7.

In the temporary installation state, the adjusting component 74 can be rotated with respect to the anchor bolt 71. As the adjust component 74 rotates with respect to the anchor bolt 71, the anchor bolt 71 moves upward or downward in the vertical direction according to the direction of rotation. As the plurality of anchor bolts 71 coupled to the individual steel materials 40 and 50 move in the vertical direction, the steel materials 40 and 50 also move in the vertical direction. Therefore, the height of the steel foundation 30 with respect to the ground level GL can be adjusted according to the amount of rotation of the adjusting component 74 with respect to the anchor bolt 71. When the steel foundation 30 is lowered to the lowest position in the height adjustment range of the steel foundation 30 (hereinafter referred to as “lower limit state”), the fourth nut 72D comes into contact with the top surface 74D of the adjusting component 74 and is an anchor. 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 protruding from the fourth nut 72D of the anchor bolt 71. In a preferred example, the depth of the hole 74A is determined so 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 foundation 30. Therefore, it is possible to prevent the second end portion 71D of the anchor bolt 71 from coming into contact with the auxiliary layer 12 as the height of the steel foundation 30 is adjusted.

The height LA of the adjusting component 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 foundation 20 and the cover thickness of the anchor bolt 71. The height LA is the distance between the top surface 74D and the bottom surface 74E of the adjusting component 74. An example of the maximum value of height LA is 100 mm. When the height LA is 100 mm or less, the joint strength between the concrete foundation 20 and the anchor bolt 71 becomes high. Examples of minimum height LAs are 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 thickness of the anchor bolt 71 can be further secured. An example of the range that the height LA can take is 40 mm to 100 mm and 60 mm to 100 mm.

As shown in FIG. 8, the outer peripheral steel material 40 further includes a housing structure 46 for accommodating the anchor set 70. The compartment steel 50 also has a similar accommodation structure. Here, the details of the accommodation structure 46 will be illustrated by taking the outer peripheral steel material 40 as an example. The accommodation structure 46 is composed of a recess 44, a hole 41C of the first flange 41, and a hole 42C of the second flange 42. The hole 41C opens in each of the inner surface 41A and the outer surface 41B of the first flange 41. The hole 42C opens in each of the inner surface 42A and the outer surface 42B of the second flange 42. The holes 41C and 42C are formed coaxially. By inserting the anchor bolts 71 into the holes 41C and 42C so that the anchor bolts 71 straddle the entire recess 44, the anchor bolts 71 are accommodated in the accommodation structure 46. Hereinafter, this state is referred to as a “containment state”. The bolt 130 that connects the skeleton 110 of the building body 100 and the steel foundation 30 is inserted into the hole 42C of the second flange 42 (see FIG. 1).

In the housed state, the outer peripheral steel material 40 and the anchor set 70 have the following relationship. A part of the anchor bolt 71 including the first end portion 71C 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 part of the anchor bolt 71 including the second end portion 71D 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 adjusting component 74 are coupled to this portion. The third nut 72C comes into contact with the outer surface 41B of the first flange 41. The movement of the anchor bolt 71 with respect to the outer peripheral steel material 40 is restricted by the nuts 72A to 72C.

When the anchor set 70 is installed in the auxiliary layer 12, as shown in FIG. 9, the anchor bolt 71 housed in the housing structure 46 is pulled out from the recess 44 to form a protruding state. The relationship between the steel materials 40 and 50 and the anchor set 70 in the protruding state is the same as the relationship shown in FIG. 7. The length of the anchor bolt 71 located outside the recess 44 in the housed 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. Therefore, when the outer peripheral steel material 40 is conveyed in the housed state, the bulk of the outer peripheral steel material 40 to which the anchor set 70 is bonded becomes low, and the workability related to the transportation is improved. The above-mentioned items related to the accommodation state and the transportation of the anchor set 70 are also common to the section steel material 50.

An example of the construction method of the foundation structure 10 will be described with reference to FIGS. 8 to 11. The construction method of the foundation structure 10 includes the first step to the ninth step. The fourth step is an example of the placement step. The fifth step is an example of the adjusting step. The eighth step is an example of the forming step.

As shown in FIG. 10, in the first step, an excavation ditch GA is formed in the ground G. Next, a plurality of piles 11 are driven into the bottom GB of the excavation ditch GA. In the second step, a discarded concrete layer is formed as an auxiliary layer 12 in the bottom GB of the excavation ditch GA. In the third step, a plurality of outer peripheral steel materials 40 and a plurality of section steel materials 50 are carried around the excavation groove GA. An anchor set 70 is coupled to the outer peripheral steel material 40 and the compartment steel material 50 so that the accommodation state shown in FIG. 8 is formed in each outer peripheral steel material 40 and each compartment steel material 50 to be carried in. Since the steel materials 40 and 50 and the anchor set 70 are transported together, the efficiency of material transportation is improved. Further, in the housed state, most of the anchor bolts 71 are housed in the recesses 44 of the outer peripheral steel material 40 or the recesses 54 of the compartmentalized steel material 50, so that the bulk of each of the steel materials 40 and 50 including the anchor set 70 becomes low, and the bulk of the materials is reduced. Workability related to transportation is improved.

In the fourth step, the steel materials 40 and 50 are installed 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 arranged above the auxiliary layer 12 by a transport machine. Each steel material 40, 50 is supported by a transport machine until a temporary installation state is formed in which each steel material 40, 50 is supported by the anchor set 70. Next, the first nut 72A is removed from the anchor bolt 71. Next, the anchor bolt 71 is pulled out from the recesses 44 and 54 so that the first end 71C of the anchor bolt 71 is separated from the inner surfaces 42A and 52A of the second flanges 42 and 52 in the recesses 44 and 54. Next, the second nut 72B is removed from the anchor bolt 71. Next, all of the anchor bolts 71 are pulled out from the recesses 44 and 54. Next, the second nut 72B is coupled to the anchor bolt 71. Next, the first end portion 71C of the anchor bolt 71 is included so that the distance from the inner surfaces 41A, 51A of the first flanges 41, 51 to the first end portion 71C of the anchor bolt 71 becomes a predetermined predetermined distance. The portions are arranged in the recesses 44 and 54. Next, the first nut 72A is coupled to the anchor bolt 71. By the work up to this point, the protruding state shown in FIG. 9 is formed. Next, the adjusting component 74 is placed on the auxiliary layer 12.

In the fifth step, the height of the steel foundation 30 with respect to the ground level GL is adjusted. This adjustment is specifically carried out as follows. First, the height of the reference portions of the steel materials 40 and 50 with respect to the ground level GL (hereinafter referred to as “foundation height”) is measured. The reference site is arbitrarily determined. In one example, the reference portion is the outer surfaces 42B, 52B of the second flanges 42, 52 of the steel materials 40, 50, respectively. Next, for the steel materials 40 and 50 whose measured foundation height is not included in the reference range, the adjusting component 74 is rotated so that the foundation height is included in the reference range. The adjustment of the foundation height of the steel materials 40 and 50 by the adjusting component 74 is performed for each of the steel materials 40 and 50. The foundation height is adjusted until the foundation heights of all the steel materials 40 and 50 are included in the reference range.

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

In the seventh step, a formwork (not shown) for forming the concrete foundation 20 is installed in the excavation groove GA. In the eighth step, concrete is poured into the formwork. As the concrete hardens, 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 foundation 30. Specifically, this formation is carried out as follows. First, the wire mesh 90 is joined to the lower ground 30C of the finished steel material 40A, which is the outer peripheral steel material 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. The finishing layer 80 is completed by curing the outer layer 82.

The action and effect of the foundation structure 10 will be described. According to the foundation structure 10, when it is necessary to form the finishing layer 80 on at least a part of the steel foundation 30, the lower ground 30C of the finishing steel material 40A is located at the place where the finishing layer 80 is planned to be formed. The outer peripheral foundation 30A of the steel foundation 30 can be assembled. Since the lower ground 30C is located on the outer periphery of the outer peripheral foundation 30A, unlike the conventional foundation structure, the finishing layer 80 can be formed without attaching a panel for filling the recess of the steel material to the finishing steel material 40A. Therefore, the construction time of the foundation structure 10 can be shortened.

It should be noted that the above embodiment is an example of possible forms of the basic structure of the building and the construction method thereof according to the present invention, and is not intended to limit the forms. The basic structure of the building and the construction method thereof according to the present invention may take a form different from the form exemplified in the above embodiment. One example thereof is a form in which a part of the configuration of the embodiment is replaced, changed, or omitted, or a new configuration is added to the embodiment.

10: Foundation structure 12: Auxiliary layer 20: Concrete foundation 30: Steel foundation 30A: Outer circumference foundation 40: Outer circumference steel material 40A: Finished steel material 43B: Outer surface (web surface)
46: Containment structure 50: Section steel 71: Anchor bolt 74: Adjust parts 80: Finishing layer GL: Ground level

Claims (8)

Equipped with a steel foundation including an outer peripheral foundation composed of multiple outer peripheral steel materials
The plurality of outer peripheral steel materials include at least one finished steel material, and the plurality of outer peripheral steel materials include at least one finished steel material.
The finished steel material comprises an outer surface extending between the upper and lower ends of the finished steel material at a horizontal end orthogonal to the longitudinal direction of the finished steel material.
The outer peripheral foundation is configured such that the outer surface is located on the outer periphery of the outer peripheral foundation.
The outer peripheral steel material whose ends are arranged at the corners so as to form the corners of the outer peripheral foundation is the finished steel material, and the end face of the end portion of the outer peripheral steel material is covered with a plate and the plate is used. Is the foundation structure of the building located on the outer periphery of the outer peripheral foundation at the corner. The finished steel material is channel steel.
The outer surface is the web surface of the channel steel.
The basic structure of the building according to claim 1 . The plurality of outer peripheral steel materials are all the finished steel materials.
The foundation structure of the building according to claim 1 or 2 . The steel foundation further comprises at least one compartment steel material disposed within the outer peripheral foundation.
The outer peripheral steel material and the section steel material are shaped steels.
The type of the section steel shaped steel is different from the type of the outer peripheral steel shaped steel.
The basic structure of the building according to any one of claims 1 to 3 . The section steel material is H-section steel.
The basic structure of the building according to claim 4 . The outer peripheral steel material has a housing structure for accommodating anchor bolts.
The basic structure of the building according to any one of claims 1 to 5 . Anchor bolts attached to the steel foundation and
Further provided with an adjusting component attached to the anchor bolt so that the height of the steel foundation with respect to the ground level can be adjusted.
The basic structure of the building according to any one of claims 1 to 6 . The material constituting the adjusting component is synthetic resin or concrete.
The basic structure of the building according to claim 7 .

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