JP2011247010A - Foundation structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a foundation structure which keeps heat insulating properties even when a shock is applied to the foundation structure from the outside.SOLUTION: The foundation structure supports a building A and comprises: a steel foundation 2 for supporting the building A; a foundation slab 10 made of reinforced-concrete, which is provided between the steel foundation 2 and a ground, and receives a load from the steel foundation 2; and a foundation heat-insulating body 40 which is arranged between the steel foundation 2 and ambient air and between the foundation slab 10 and the ambient air. The foundation heat-insulating body 40 is arranged so as to stand closer to an ambient air side than the steel foundation 2 and the foundation slab 10 in a state of abutting on them.

Description

  The present invention relates to a foundation structure that supports an upper structure of a building such as a house.

  Cloth foundations with reinforced concrete foundation beams are known as this type of foundation, but such cloth foundations are laborious in terms of construction work, such as groundwork, reinforcement, formwork, anchor sets, etc. There is a demand from the field to improve the labor required. In order to meet such a demand, a structure using a steel frame as a foundation beam is known. For example, Patent Document 1 discloses a foundation structure in which a lower portion of an H-shaped steel is embedded in a foundation slab to use the H-shaped steel as a foundation beam. Is disclosed. Alternatively, Patent Literature 2 discloses a foundation structure in which H-shaped steel is fixed to a foundation slab via an anchor member. Moreover, in these foundation structures, it is necessary to consider the corrosion of the H-shaped steel caused by exposure to wind and rain, and as a countermeasure, a decorative cover is provided on the outer surface of the H-shaped steel.

  By the way, in order to give the thermal performance according to the room to the space under the 1st floor surrounded by the foundation structure, the structure which gave the heat insulation performance to the cloth foundation made from a reinforced concrete is known (patent document 3), and this heat insulation performance is known. Application to a steel base as described above is also being studied.

JP 2001-262586 A Japanese Patent Laid-Open No. 2003-268782 JP 2004-107974 A

  Although it is considered that a heat insulating material is attached instead of the decorative cover of Patent Document 1 or Patent Document 2 as in Patent Document 3, in the basic structure of Patent Document 1 or Patent Document 2, the decorative cover itself has a certain degree of strength. Therefore, even if it is configured to be attached to a steel beam via a bracket or stay with a bolt or the like at predetermined intervals, it will have sufficient strength against external impacts. Low strength compared to the cover. For this reason, when a heat insulating material is installed using the support method disclosed in the above-mentioned patent document, when an impact such as a ball or kicking acts on a midway portion not supported by the bracket or the stay, the heat insulation is performed by the impact. It is conceivable that breakage such as cracks occurs in the material, which reduces the heat insulation performance of the entire foundation.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a basic structure capable of maintaining heat insulation even when an impact is applied from the outside.

(1) In order to solve the above problems, the specific structure of the foundation structure according to the present invention is as follows:
A steel foundation supporting the superstructure,
A support made of reinforced concrete provided between the steel foundation and the ground, which receives a load from the steel foundation;
Comprising a steel base and a base insulator interposed between the support and the outside air,
The basic insulation is
It is characterized in that it is erected on the outside air side with respect to the steel base and the support over the entire surface.
According to this, since the base heat insulator itself is supported by the steel base and the support body over the entire surface, there is no great difference in impact resistance depending on the part, and the strength against shock is uniformly exhibited. Further, damage such as cracks can be suppressed as much as possible. In addition, since the basic thermal insulator is covered to the side surface of the support, the thermal insulation performance for the support will also be exhibited, and thereby, the thermal environment of the first floor underfloor space is better according to the room. It has become something that can be done.

(2) Moreover, the said steel material foundation is assembled at the position which becomes an inner side rather than the outer edge of the said support body,
The basic insulation is
A base heat insulating material that stands up in contact with the steel material foundation, a finish heat insulating material that stands up in contact with the base heat insulating material and covers from the side surface of the support to the side surface of the steel material base;
It is preferable to provide.
According to this, since the foundation heat insulating material is supported by the steel material foundation and the finishing heat insulating material is supported by the foundation heat insulating material, the finishing heat insulating material is supported by the support body and the underlying heat insulating material. It will be supported by the steel base via, and there will be no significant difference in impact resistance depending on the part, it will uniformly exhibit strength against impact, and damage such as cracks can be suppressed as much as possible Become. Further, since the basic heat insulator has a double structure in the thickness direction composed of the base heat insulating material and the finish heat insulating material, the heat insulating performance as a heat insulating material can be improved. In addition, because of such a double structure, even if the finish heat insulating material is damaged due to impact from the outside of the finish heat insulating material, etc., after the finish heat insulating material is removed, a new finish heat insulating material is removed. The return operation can be completed only by bringing the material into close contact with the exposed base heat insulating material.

(3) Moreover, the said finishing heat insulating material is the lower heat insulating material which covers the side surface of the said support body, and the upper heat insulating material which is mounted in the upper end part of this lower heat insulating material, and covers the outer surface of the said steel material foundation. Each has a separate body,
It is preferable that the base heat insulating material has a thickness at least equal to the distance from the back surface of the decorative heat insulating material to the outer surface of the steel material base and is interposed between them.
According to this, it is possible to install the lower thermal insulation of the finishing thermal insulation along with the construction of the support, and install the upper thermal insulation and the base thermal insulation of the finishing thermal insulation along with the construction of the steel foundation. A heat insulating material can be installed in accordance with the construction, and the workability can be improved.

(4) Moreover, the said lower side heat insulating material is extended and provided to the position slightly higher than the upper surface of the said support body, The lower end part of the said base heat insulating material is an upper end part of the said lower side heat insulating material It is preferable that it extends downward and is in contact with the upper surface of the support.
According to this, the base heat insulating material is located on the back side of the seam between the lower heat insulating material and the upper heat insulating material of the finishing heat insulating material, and it is possible to reduce heat insulation and airtight defects due to the seam. .

(5) Moreover, it is preferable that the said base heat insulating material is being fixed to the said finishing heat insulating material with the pin inserted from the outer side of the said finishing heat insulating material.
According to this, the finishing heat insulating material can be fastened to the base heat insulating material from the outside air side. For this reason, as long as the base heat insulating material is attached to the steel base, the finishing heat insulating material can be attached at any time, and the degree of freedom in construction increases. In addition, even if a large impact locally acts on the finished heat insulating material, and this causes damage to the finished heat insulating material, it can be restored to its original state by replacing only the finished heat insulating material. It becomes the original. Moreover, since the pin is inserted from the outer surface side of the finish heat insulating material, work such as replacement of the finish heat insulating material can be performed from the outdoor side, and workability can be improved.

  According to the basic structure of the present invention, heat insulation can be maintained even when an impact is applied from the outside.

It is sectional drawing which shows the basic structure of embodiment which concerns on this invention. It is a top view which shows the part in which the horizontal brace was installed through the beating. It is a perspective view which shows the process of installing a steel frame beam. It is a perspective view which shows the process of installing a horizontal brace. (A)-(d) is a figure which shows the procedure which assembles a foundation heat insulating body. It is a perspective view which shows the process of installing an upper structure in a beam. It is a figure which shows the other structure of the basic heat insulating body and foundation structure which concern on this invention. It is a figure which shows the further another structure of the basic structure which concerns on this invention.

  Hereinafter, an embodiment of a foundation structure according to the present invention will be described in detail with reference to FIGS.

  As shown in FIG. 1, the foundation structure of the present embodiment includes a reinforced concrete foundation slab (support) 10, a steel foundation 2 assembled at the top of the foundation slab 10, the foundation slab 10 and the steel foundation 2. And a basic heat insulating body 40 that covers from the outdoor side.

  Building A illustrated as an upper structure in the present embodiment is a two-story steel-frame industrialized house by a beam winning method having a 305 mm flat module. However, this is only a preferable application example, and the scope of application of the present invention is not limited thereto.

  In the building A, a pillar (hereinafter also referred to as a first-floor pillar) 50 provided on a foundation frame structure composed of a foundation slab 10 and a steel foundation 2 and standingly fixed on the steel foundation 2 (see FIG. 6). ), A second-floor beam arranged so as to connect the upper ends of the first-floor pillars 50, a second-floor pillar arranged on the second-floor beams, an R-floor large beam, and two adjacent pillars 50 Each of the members of the load-bearing elements 51 and the like installed in the plurality is selected from orthogonal reference lines (X-direction reference line, Y-direction reference line) (set to be an integral multiple of the module) ) It is arranged corresponding to the street and the basic frame is configured. Furthermore, in the building A, each floor is composed of floor panels made of ALC (Autoclaved Light-weight Concrete) supported by each floor beam, and each floor is constructed using the outer peripheral beam. An outer wall panel or an opening panel made of ALC or the like is attached to form an outer wall.

  As shown in FIG. 1, the foundation slab 10 as a support is entirely solid. In the foundation slab 10, the bar arrangement amount is calculated by regarding the range of the predetermined width corresponding to each of the above as a foundation beam capable of exhibiting proof strength against the ground reaction force (see FIGS. 3 and 4). . Of the basic slab 10, the area other than this is determined as a fixed slab with four sides receiving a ground reaction force, and the bar arrangement amount is determined.

  In this embodiment, the solid foundation type foundation slab 10 is illustrated, but is not limited to such a solid foundation type, for example, has a desired width according to the ground strength along the street. A footing type configuration can also be employed.

  In addition, the foundation slab 10 is formed with the upper end surface higher than the ground surface, and this prevents water from entering the space under the first floor of the building A that is on the indoor side of the foundation insulation 40. It becomes.

  The steel material foundation 2 includes a steel bundle 20 installed on the upper end surface of the foundation slab 10, a steel beam 30 supported by the bundle 20, and a steel horizontal brace 31 installed between the beams 30. And.

  The bundle 20 is placed on the upper surface of the foundation slab 10 and supports the beam 30. An anchor bolt (anchor frame) 11 is embedded in the foundation slab 10 in advance, and a bundle 20 is joined and fixed to the upper end portion of the anchor bolt 11 with a nut or the like. The bundle 20 has a role of efficiently transmitting the load transmitted from the column (first floor column) 50 of the building A to the foundation slab 10 and is a first floor column standing on at least the large beam 30 (on the street). It is installed immediately below 50 and joined using a bolt hole in the lower flange of the middle part of the joint box 21 or the first-floor large beam 30 to support the beam 30.

  Further, the bundle 20 has a lower flange 20b joined to the upper end portion of the anchor bolt 11, an upper flange 20a joined to the joint box 21, for example, and a cross section connecting these flanges 20a and 20b has a cross or cross, for example. The web 20c has a shape.

  As shown in FIG. 3, the bundle 20 is appropriately arranged on the outer peripheral portion (that is, the portion near the outer wall) and the inner peripheral portion (that is, the portion near the inside of the building A) of the building A. Among these, the bundle 20 arranged on the outer peripheral portion (outer street) has the same edge position of the upper flange 20a and the lower flange 20b on the outside of the building, and the lower flange 20b is more on the inside of the building than the upper flange 20a. It extends toward the inside of the building, and the extending-side web 20c has a shape (offset shape) formed so as to extend from the end edge of the upper flange 20a to the end edge of the lower flange 20b. In addition, at the entrance corner and the exit corner of the building A, the lower flange 20b extends from the upper flange 20a in two directions along the outer wall, and the extended web 20c extends from the edge of the upper flange 20a to the lower flange. A bundle 20 formed so as to spread toward the end edge of 20b is adopted.

  By using such an offset-shaped bundle 20, the load is distributed and transmitted to a wider range of the foundation slab 10, and a width that can be regarded as a foundation beam in structural calculation can be increased in the foundation structure. Yes.

  The beam 30 is made of, for example, an H-shaped steel (including a shaped steel called an I-shaped steel), and gusset plates 34 each having an L-shaped tip and having bolt holes formed at both ends in the longitudinal direction are joined by welding. (See FIG. 2, FIG. 3, etc.).

  The beam 30 is not only a so-called large beam (first-floor large beam) arranged on the street, but also a small bridge that is installed between the large beams that are installed to support the floor panel that forms the first-floor floor of the building A. A beam 30 ′ is also included (see FIG. 3). The small beam 30 'may be bridged between the large beam and another small beam 30'.

  As shown in FIG. 3, the upper flange 30a and the lower flange 30b of the beam 30 are provided with bolt holes 30d through which bolts for joining module columns are inserted at equal intervals based on the module. The bolt hole 30d is drilled so as to be located on the intersection of the plane-view reference line. In addition, bolt holes 30d through which bolts for joining other beams 30 are also inserted into the web 30c at regular intervals with a pitch based on the module. Furthermore, large diameter holes (for example, a diameter of 125 mm) 30e are formed in the web 30c of the beam 30 at predetermined intervals.

  As shown in FIGS. 2 and 3, when the ends of the beams 30 are joined together, a joint box 21 is used in this embodiment.

  The joint box 21 is configured by welding a square upper flange 21a and a lower flange 21b to upper and lower ends of a cross-shaped web 21c in plan view. When joining the beam 30 to the joint box 21, the two surfaces of the gusset plate 34 of the beam 30 are brought into contact with the two surfaces of the web 21c perpendicular to each other, and the bolt holes in the bent portion of the gusset plate 34 and the corresponding bolt holes. Bolts are inserted into the bolt holes of the joint box 21 and bolted.

  As shown in FIGS. 1 and 4, a horizontal brace (stiffener) 31 is installed on the floor construction surface of the first floor, and suppresses deformation of the beam 30 and the like during concrete placing work or the like. The horizontal brace 31 installed on the floor construction surface is a member for securing the in-plane rigidity of the first floor after the building is completed.

  In addition, as shown in FIG. 2, the horizontal brace 31 is attached near the upper end of the beam 30 via a fire hitting 35, thereby preventing the deformation of the beam 30 and the like, workability at the time of foundation formation, under the floor. Usability can be further improved.

  In addition to the horizontal brace 31 exemplified here, it is also possible to use a fire beam (fired base, fired metal) or the like as a stiffener.

  As shown in FIG. 6, the pillar 50 is disposed at the intersection of the street and the reference line perpendicular to the street, and the lower end portion is joined using the bolt hole 30 d of the upper flange 30 a of the middle portion of the joint box 21 or the large beam 30. The

  Further, the strength element 51 is bolted to the inner side surfaces of the two columns 50 arranged at a predetermined interval (for example, 610 mm, 915 mm, etc.). The load-bearing element 51 is constituted by a brace (cross frame), for example.

  As shown in FIG. 1, the foundation heat insulator 40 surrounds the beam 30 provided along the outer periphery of the building A and positioned at the edge of the foundation slab 10 and the outer periphery of the steel foundation 2 from the outside air side. ing.

  In the case of this embodiment, the basic heat insulating body 40 includes a heat insulating portion 41 made of a plastic heat insulating material such as an extruded polystyrene foam or phenol foam, and a protective layer 42 that protects the outer surface of the heat insulating portion 41. Yes.

  The heat insulating portion 41 is erected on the outside air side in contact with the steel slab 2 and the base slab 10 as a support, and the base heat insulating material 43 rising in the state of being in contact with the steel slab 2; A finishing heat insulating material 44 that stands up in contact with the base heat insulating material 43 and covers from the side surface of the foundation slab 10 to the side surface of the steel material foundation 2 is provided.

  The base heat insulating material 43 has a height from the upper surface of the foundation slab 10 to the upper end surface of the beam 30 of the steel material foundation 2. Moreover, it has the thickness equal to the space | interval from the end surface of the foundation slab 10 which will be located in the same plane as the back surface of the finishing heat insulating material 44 to the outer surface of the steel material foundation 2. Therefore, after assembling the foundation slab 10 and the steel foundation 2, the lower surface of the foundation heat insulating material 43 is brought into contact with the upper surface of the foundation slab 10, and the foundation insulation 43 is leaned against the beam 30 of the steel foundation 2 only. While the heat insulating material 43 covers the outer surface of the steel material foundation 2, the outer surface of the base heat insulating material 43 and the side surface of the foundation slab 10 are positioned in the same plane. Further, the base heat insulating material 43 is erected along the steel material base 2, so that the upper end portion and the middle portion are supported in the longitudinal direction of the beam 30 by the upper and lower flanges 30 a and 30 b of the beam 30 of the steel material base 2. Will be.

  The finish heat insulating material 44 is separately formed from a lower heat insulating material 45 that covers the side surface of the foundation slab 10 and an upper heat insulating material 46 that is connected to the upper end portion of the lower heat insulating material 45 and covers the outer surface of the steel material foundation 2. It is equipped with.

  The lower heat insulating material 45 is formed in a flat plate shape that covers the upper end portion from the lower end portion of the side surface of the foundation slab 10 and has a height protruding from the upper end portion.

  The upper heat insulating material 46 has the same thickness as the lower heat insulating material 45, and the upper end surface of the upper heat insulating material 46 is placed on the upper end surface of the lower heat insulating material 45, and the upper flange 30 a of the beam 30 of the steel foundation 2. It is formed in the flat form provided with the height used as the same position. Further, the back surface of the upper heat insulating material 46 is attached in close contact with the side surface of the base heat insulating material 43, whereby the upper heat insulating material 46 is supported by the base heat insulating material 43 over the entire surface. As a result, it is supported by the beam 30 of the steel base 2 through the base heat insulating material 43.

  The upper and lower side heat insulating materials 45 and 46 of the base heat insulating material 43 and the finish heat insulating material 44 are laid along the longitudinal direction of the beam 30, respectively, thereby forming the heat insulating portion 41 of the basic heat insulating body 40. The joint between the base heat insulating material 43 and the seam between the finishing heat insulating material 44 are provided at positions shifted from each other, and the outer surface of the base heat insulating material 43 is located at the back of the joint of the finishing heat insulating material 44. Thereby, the airtightness is improved.

Similarly, since the lower heat insulating material 45 is provided in a state protruding to a position above the upper surface of the foundation slab 10, the base heat insulating material is provided at the back of the joint between the upper heat insulating material 46 and the lower heat insulating material 45. The outer surface of the material 43 is positioned, and even in the joint, the airtightness is improved.
The base heat insulating material 43 is fixed to the finishing heat insulating material 44 by pins 47 inserted from the outside of the finishing heat insulating material 44.

  The pin 47 is made of a non-metallic material such as resin. Further, the pin 47 is generally provided with a head at one end of the shaft portion, but the pin 47 alone or a head that is remarkably smaller than the shaft portion may be employed. . As a result, when the pin 47 is pushed into the upper heat insulating material 46, the pin 47 is hardly exposed on the surface of the upper heat insulating material 46, thereby preventing the pin 47 from forming the protective layer 42. Can be avoided. In addition, the pin 47 of the present embodiment has a slightly uneven shape on the shaft portion, thereby having a frictional resistance with the upper heat insulating material 46 and being difficult to be pulled out.

  As a result, the base heat insulating material 43 is connected to the upper heat insulating material 46 of the finishing heat insulating material 44, and is not joined to the beam 30, but simply contacts.

  Further, the lower heat insulating material 45 of the finish heat insulating material 44 also functions as a formwork (dam plate) on the outer periphery of the foundation slab 10 by being erected in front of the beam 30 before placing the concrete of the foundation slab 10. It becomes. Therefore, the level of the lower end of the lower heat insulating material 45 is the same as the level of the lower end of the basic slab 10. By installing the lower heat insulating material 45 in advance, the degree of adhesion with concrete is increased.

  The protective layer 42 protects the surface of the heat insulating portion 41 that is exposed to the outdoors. In this embodiment, the protective layer 42 is a resin mortar over the entire surface of the finish heat insulating material 44 that is the surface of the heat insulating portion 41. It is formed by plastering. Further, as the resin mortar is plastered on the outer surface of the finish heat insulating material 44, which is the surface of the heat insulating portion 41, a reinforcement net or the like is provided at a joint portion between the finish heat insulating materials 44 to improve waterproofness and strength. It is also possible to adopt. Further, instead of the resin mortar, it is also possible to adopt a configuration in which a protective layer 42 is formed by sticking tiles, sidings, or the like as surface materials on the surface of the finishing heat insulating material 44.

  In addition, a metal fitting 53 that receives the lower end portion of the outer wall of the building A is attached to the upper end portion of the beam 30 in a state of protruding outward. The receiving metal object 53 reaches a position where the tip is slightly outside the basic heat insulating body 40, and the upper part of the basic heat insulating material 40 and the auxiliary material 43 is covered by the receiving metal object 53. Further, the tip end portion of the metal receiving piece 53 is bent downward, and the sealing material 54 is sandwiched between the tip end portion and the basic heat insulating body 40. Further, a sealing material is also interposed between the front end portion of the metal fitting 53 and the lower end portion of the outer wall.

Then, the construction procedure of the said foundation structure is demonstrated below.
As shown in FIG. 3, first, the ground is cut down (root cutting), and crushed stones 17 are spread and rolled. And a PC board is installed in the bundle position (position where the bundle 20 is installed) in the root cutting bottom. After fixing the fixing plate of the anchor bolt 11 to the PC plate, the anchor bolt 11 is fixed to the fixing plate.

  Subsequently, the reinforcing bars 12 are arranged. In this embodiment, the reinforcing bars 12 are densely arranged in a portion (a range of a predetermined width along the street) regarded as the foundation beam that receives the beam 30 of the steel foundation 2 according to the calculated arrangement amount. The

  Thereafter, the bundle 20 is installed on the anchor bolt 11. First, a lower nut for temporarily supporting the bundle 20 is screwed into the anchor bolt 11, and the level (height) of the bundle 20 is adjusted. Subsequently, the anchor bolt 11 is inserted into the bolt hole of the lower flange 20b of the bundle 20, and the upper nut is further screwed to fix the bundle 20.

Subsequently, the beam 30 is placed on the bundle 20 and fixed using bolts and nuts.
Thereafter, as shown in FIG. 4, a stiffener such as a horizontal brace 31 is attached to the first floor construction surface, and the diagonal dimension of the beam 30 is confirmed to adjust the position of the beam 30 (correction of distortion). As described above, it is preferable to install the horizontal brace 31 at a high surface.

After that, as shown in FIG. 5A, the lower heat insulating material 45 is raised around the reinforcing bars 12 which have already been arranged. At this time, an interval between the back surface of the lower heat insulating material 45 and the reinforcing bar 12 is set to an extent that a cover thickness of the outermost reinforcing bar 12a can be sufficiently secured.
Thereafter, a mold is installed outside the lower heat insulating material 45, and concrete is cast. In the present embodiment, concrete is placed in accordance with the lower end level of the bundle 20. Curing concrete for a few days. At this time, the upper end portion of the lower heat insulating material 45 protrudes from the upper surface of the basic slab (see FIG. 5B).

  After the mold is removed from the mold, as shown in FIG. 5C, the base heat insulating material 43 is erected on the outer surface of the beam 30 of the steel base 2. Here, since the upper end portion of the lower heat insulating material 45 protrudes from the upper surface of the foundation slab 10, the lower heat insulating material 45, as shown in FIG. The base slab 10 and the guide portion S formed by the steel base 2 are formed in a groove shape, and the base heat insulating material can be easily formed by fitting the lower end portion of the base heat insulating material 43 to the groove-shaped guide portion S. 43 can be installed in an upright state. Further, the outer surface of the base heat insulating material 43 is the same as the side surface of the foundation slab 10 by leaning the base heat insulating material 43 against the beam 30 in a state where the lower end portion of the base heat insulating material 43 is fitted in the groove-shaped guide portion S. Or it will be located in substantially the same plane shape.

  Next, as shown in FIG. 5D, the upper heat insulating material 46 is installed on the upper end surface of the lower heat insulating material 45, and the heat insulating portion 41 is assembled. At this time, the outer side surface of the base heat insulating material 43 is located on the same plane as the end surface, and consequently the back surface of the lower heat insulating material 45, so that the upper heat insulating material 46 is placed on the upper end surface of the lower heat insulating material 45. As a result, the upper heat insulating material 46 is simultaneously supported by the base heat insulating material 43, and thus the upper heat insulating material 46 can be stably installed. Thereafter, the pins 47 are inserted from the outer surface side of the upper heat insulating material 46, and the base heat insulating material 43 is fastened to the upper heat insulating material 46. On the other hand, the upper heat insulating material 46 is merely placed on the lower heat insulating material 45, and the upper heat insulating material 46 and the lower heat insulating material 45 are not connected to each other. This facilitates the removal of the upper heat insulating material 46 and facilitates repairs such as replacement of the upper heat insulating material 46.

  Thereafter, a protective layer 42 is formed by plastering resin mortar on the surface of the finishing heat insulating material 44 which is the surface of the heat insulating portion 41 to give strength to the outer side surface of the finishing heat insulating material 44, and the seam between the finishing heat insulating materials 44. Fill. Thereby, the basic heat insulating material 40 is formed.

  The basic structure is completed by the above steps, and thereafter, as shown in FIG. 6, each part of the building A such as the column 50 and the load-bearing element 51 is sequentially assembled on the beam 30.

  According to the basic structure of the present embodiment, since the basic thermal insulator 40 itself is supported by the steel base 2 and the basic slab 10 over the entire surface, there is no significant difference in impact resistance depending on the part. In addition, it exhibits strength against impacts uniformly, suppresses damage such as cracks as much as possible, and maintains heat insulation performance. Moreover, since it fills with the plastic-type heat insulating material which forms the heat insulation part 41 from the outside air side to the outer surface of the steel material foundation 2, the said basic heat insulating body 40 breaks through and is surrounded by the external air and the said basic heat insulating body 40. There is no risk of communication with the underfloor space. Of course, since the basic heat insulating body 40 is formed thick in this way, the heat insulating airtightness of the underfloor space is also improved.

  Moreover, since it is the structure by which the base heat insulating body 40 is covered to the side surface of the foundation slab 10, the thermal insulation performance with respect to the said foundation slab 10 will also be exhibited, and, thereby, the thermal environment of the floor space under the first floor is better according to the room It will be something.

  Further, since the basic heat insulating body 40 has a double structure in the thickness direction composed of the base heat insulating material 43 and the finishing heat insulating material 44, the finishing heat insulating material 44 is temporarily received by receiving an impact from the outside of the finishing heat insulating material 44. Even if it is damaged, after the finish heat insulating material 44 is removed, the restoration work can be completed only by bringing the new finish heat insulating material 44 into close contact with the exposed base heat insulating material 43. It is. In particular, although the upper heat insulating material 46 of the finish heat insulating material 44 is protected by the protective layer 42, it is exposed to the outside and covers the steel base 2, so that it is deteriorated and damaged more than other heat insulating materials due to external impacts and wind and rain. However, since the upper heat insulating material 46 is only pinned to the base heat insulating material 43 in a state of being placed on the lower heat insulating material 45, the replacement can be performed very easily. Has become.

  In addition, the basic heat insulating body 40 is configured by being divided into a base heat insulating material 43, a lower heat insulating material 45, and an upper heat insulating material 46, and the basic heat insulating material 40 is formed by assembling them. Along with the construction of the slab 10, the lower heat insulating material 45 of the finishing heat insulating material 44 is installed, and then the upper heat insulating material 46 and the base heat insulating material 43 are installed at an appropriate timing. As a result, the workability can be improved. Here, when the upper heat insulating material 46 and the lower heat insulating material 45 are integrally formed as the finishing heat insulating material 44, when the finishing heat insulating material 44 is erected as a formwork for the foundation slab 10 construction, Compared to the installation height, the finish insulation 44 protrudes more than necessary, which not only hinders the passage of workers, but also damages the finish insulation 44 in the construction stage due to collision of tools and building materials. It is possible that In the present embodiment, the finish heat insulating material 44 is divided into an upper heat insulating material 46 and a lower heat insulating material 45, and a structure that is assembled as appropriate according to the progress of construction is employed. The construction can proceed smoothly.

  The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the scope of the present invention.

  For example, as shown in FIG. 7A, the basic heat insulating body 40 is set as a base heat insulating portion 43a as a portion corresponding to the base heat insulating material 43, and as a portion corresponding to the finishing heat insulating material 44, these are set as the finishing heat insulating portion 44a. Even if it is the structure which forms the heat insulation part 41a of the basic heat insulation body 40 by uniting, it has the same effect as this embodiment.

  Further, as shown in FIG. 7B, a base heat insulating portion 43a is set as a portion corresponding to the base heat insulating material 43, and an upper heat insulating portion 46a is set as a portion corresponding to the upper heat insulating material 46 of the finish heat insulating material 44. It is also possible to adopt a configuration in which the steel base side heat insulating member 41b in which these are integrated and the heat insulating portion 41b of the base heat insulating body 40 is formed by the steel base side heat insulating member 41b and the lower heat insulating material 45. .

  Similarly, as shown in FIG. 7C, a finish heat insulating material 44 c in which the upper heat insulating material 46 and the lower heat insulating material 45 are integrated is formed, and the basic heat insulating material 40 is formed by the finish heat insulating material 44 c and the base heat insulating material 43. The structure which forms can also be employ | adopted.

  Further, as shown in FIG. 8, the upper end surface of the lower heat insulating material 45 of the finishing heat insulating material 44 is formed in a downwardly inclined shape from the indoor side to the outdoor side, and the lower end surface of the upper heat insulating material 46 is made to correspond to that. It is also possible to adopt a configuration in which a downward slope is formed from the inside toward the outdoor side. According to such a configuration, even if rainwater or the like enters between the upper heat insulating material 46 and the base heat insulating material 43, the water can be discharged outdoors using the inclination. Similarly, from the viewpoint of waterproofing, it is possible to adopt a configuration in which the slope is formed in a downward slope from the indoor side to the outdoor side. According to this, it becomes possible to discharge rainwater or the like that has entered between the upper heat insulating material 46 and the base heat insulating material 43 toward the ground.

  Moreover, it is possible to employ | adopt the structure which forms the basic heat insulation body 40 of this embodiment by combining a some heat insulating board suitably irrespective of the said structure.

In addition, the upper heat insulating material 46 is formed to be wider than the lower heat insulating material 45 within a range that does not cause a step on the surface of the heat insulating portion 41 that forms the protective layer 42, while the base heat insulating material 43 is increased by the increased thickness. It is also possible to adopt a configuration in which the thickness of each heat insulating plate is appropriately changed, such as reducing the thickness of the heat insulating plate.
Moreover, the foundation slab 10 can adopt a configuration in which only the outer portion is higher than the ground surface and the central portion is lower than the ground surface, or a configuration in which a water gradient is gently provided from the outer portion toward the ground surface. It is.

  In the above-described embodiment, the anchor bolt 11 is used as a method of fixing the bundle 20 to the foundation slab 10. However, instead of this, the bundle 20 may be fixed by an embedded nut and bolt. it can. When configured in this manner, there is no longer any restraint in the lateral direction of the bundle 20 by removing the bolts. For example, when moving or adding a pillar in accordance with an extension or reconstruction, the bundle 20 can be easily removed. it can.

2 Steel foundation 10 Foundation slab (support)
11 Anchor bolt 12 Reinforcing bar 13 Concrete 20 Bundle 30 Beam 31 Horizontal brace 40 Base heat insulator 41 Heat insulating part 42 Protective layer 43 Base heat insulating material 44 Finishing heat insulating material 45 Lower heat insulating material 46 Upper heat insulating material 47 Pin 50 Pillar 51 Column 51 Strength element A Building

Claims (5)

A steel foundation supporting the superstructure,
A support made of reinforced concrete provided between the steel foundation and the ground, which receives a load from the steel foundation;
Comprising a steel base and a base insulator interposed between the support and the outside air,
The basic insulation is
A foundation structure characterized by being erected on the outside air side in contact with the steel base and the support. The steel material foundation is assembled at a position that is inside the outer edge of the support,
The basic insulation is
A base heat insulating material that stands up in contact with the steel material foundation, a finish heat insulating material that stands up in contact with the base heat insulating material and covers from the side surface of the support to the side surface of the steel material base;
The foundation structure according to claim 1, comprising: The finishing heat insulating material includes a lower heat insulating material that covers the side surface of the support and an upper heat insulating material that is placed on the upper end portion of the lower heat insulating material and covers the outer surface of the steel base. ,
The said base heat insulating material has thickness equal to the space | interval from the back surface of the said finish heat insulating material to the outer surface of the said steel material foundation, and interposes among these. Foundation structure. The lower heat insulating material is provided to extend to a position slightly higher than the upper surface of the support, and the lower end portion of the base heat insulating material extends below the upper end portion of the lower heat insulating material. The foundation structure according to claim 3, wherein the foundation structure is in contact with an upper surface of the support body. The foundation structure according to any one of claims 1 to 4, wherein the base heat insulating material is fixed to the finishing heat insulating material by a pin inserted from the outside of the finishing heat insulating material.